forked from Minki/linux
e709ed70d1
We have dts property for "ti,sysc-delay-us", and we're using it, but the
wait after OCP softreset only happens if devices are probed in legacy mode.
Let's add a delay after writing the OCP softreset when specified.
Fixes: e0db94fe87
("bus: ti-sysc: Make OCP reset work for sysstatus and sysconfig reset bits")
Cc: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2566 lines
61 KiB
C
2566 lines
61 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* ti-sysc.c - Texas Instruments sysc interconnect target driver
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*/
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/clkdev.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm_domain.h>
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#include <linux/pm_runtime.h>
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#include <linux/reset.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#include <linux/slab.h>
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#include <linux/iopoll.h>
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#include <linux/platform_data/ti-sysc.h>
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#include <dt-bindings/bus/ti-sysc.h>
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#define MAX_MODULE_SOFTRESET_WAIT 10000
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static const char * const reg_names[] = { "rev", "sysc", "syss", };
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enum sysc_clocks {
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SYSC_FCK,
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SYSC_ICK,
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SYSC_OPTFCK0,
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SYSC_OPTFCK1,
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SYSC_OPTFCK2,
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SYSC_OPTFCK3,
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SYSC_OPTFCK4,
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SYSC_OPTFCK5,
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SYSC_OPTFCK6,
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SYSC_OPTFCK7,
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SYSC_MAX_CLOCKS,
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};
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static const char * const clock_names[SYSC_MAX_CLOCKS] = {
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"fck", "ick", "opt0", "opt1", "opt2", "opt3", "opt4",
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"opt5", "opt6", "opt7",
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};
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#define SYSC_IDLEMODE_MASK 3
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#define SYSC_CLOCKACTIVITY_MASK 3
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/**
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* struct sysc - TI sysc interconnect target module registers and capabilities
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* @dev: struct device pointer
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* @module_pa: physical address of the interconnect target module
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* @module_size: size of the interconnect target module
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* @module_va: virtual address of the interconnect target module
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* @offsets: register offsets from module base
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* @mdata: ti-sysc to hwmod translation data for a module
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* @clocks: clocks used by the interconnect target module
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* @clock_roles: clock role names for the found clocks
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* @nr_clocks: number of clocks used by the interconnect target module
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* @rsts: resets used by the interconnect target module
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* @legacy_mode: configured for legacy mode if set
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* @cap: interconnect target module capabilities
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* @cfg: interconnect target module configuration
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* @cookie: data used by legacy platform callbacks
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* @name: name if available
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* @revision: interconnect target module revision
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* @enabled: sysc runtime enabled status
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* @needs_resume: runtime resume needed on resume from suspend
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* @child_needs_resume: runtime resume needed for child on resume from suspend
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* @disable_on_idle: status flag used for disabling modules with resets
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* @idle_work: work structure used to perform delayed idle on a module
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* @clk_enable_quirk: module specific clock enable quirk
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* @clk_disable_quirk: module specific clock disable quirk
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* @reset_done_quirk: module specific reset done quirk
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* @module_enable_quirk: module specific enable quirk
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* @module_disable_quirk: module specific disable quirk
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*/
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struct sysc {
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struct device *dev;
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u64 module_pa;
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u32 module_size;
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void __iomem *module_va;
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int offsets[SYSC_MAX_REGS];
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struct ti_sysc_module_data *mdata;
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struct clk **clocks;
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const char **clock_roles;
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int nr_clocks;
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struct reset_control *rsts;
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const char *legacy_mode;
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const struct sysc_capabilities *cap;
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struct sysc_config cfg;
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struct ti_sysc_cookie cookie;
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const char *name;
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u32 revision;
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unsigned int enabled:1;
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unsigned int needs_resume:1;
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unsigned int child_needs_resume:1;
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struct delayed_work idle_work;
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void (*clk_enable_quirk)(struct sysc *sysc);
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void (*clk_disable_quirk)(struct sysc *sysc);
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void (*reset_done_quirk)(struct sysc *sysc);
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void (*module_enable_quirk)(struct sysc *sysc);
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void (*module_disable_quirk)(struct sysc *sysc);
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};
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static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
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bool is_child);
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static void sysc_write(struct sysc *ddata, int offset, u32 value)
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{
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if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
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writew_relaxed(value & 0xffff, ddata->module_va + offset);
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/* Only i2c revision has LO and HI register with stride of 4 */
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if (ddata->offsets[SYSC_REVISION] >= 0 &&
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offset == ddata->offsets[SYSC_REVISION]) {
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u16 hi = value >> 16;
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writew_relaxed(hi, ddata->module_va + offset + 4);
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}
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return;
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}
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writel_relaxed(value, ddata->module_va + offset);
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}
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static u32 sysc_read(struct sysc *ddata, int offset)
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{
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if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
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u32 val;
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val = readw_relaxed(ddata->module_va + offset);
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/* Only i2c revision has LO and HI register with stride of 4 */
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if (ddata->offsets[SYSC_REVISION] >= 0 &&
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offset == ddata->offsets[SYSC_REVISION]) {
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u16 tmp = readw_relaxed(ddata->module_va + offset + 4);
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val |= tmp << 16;
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}
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return val;
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}
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return readl_relaxed(ddata->module_va + offset);
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}
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static bool sysc_opt_clks_needed(struct sysc *ddata)
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{
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return !!(ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_NEEDED);
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}
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static u32 sysc_read_revision(struct sysc *ddata)
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{
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int offset = ddata->offsets[SYSC_REVISION];
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if (offset < 0)
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return 0;
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return sysc_read(ddata, offset);
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}
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static u32 sysc_read_sysconfig(struct sysc *ddata)
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{
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int offset = ddata->offsets[SYSC_SYSCONFIG];
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if (offset < 0)
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return 0;
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return sysc_read(ddata, offset);
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}
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static u32 sysc_read_sysstatus(struct sysc *ddata)
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{
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int offset = ddata->offsets[SYSC_SYSSTATUS];
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if (offset < 0)
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return 0;
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return sysc_read(ddata, offset);
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}
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static int sysc_add_named_clock_from_child(struct sysc *ddata,
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const char *name,
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const char *optfck_name)
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{
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struct device_node *np = ddata->dev->of_node;
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struct device_node *child;
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struct clk_lookup *cl;
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struct clk *clock;
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const char *n;
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if (name)
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n = name;
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else
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n = optfck_name;
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/* Does the clock alias already exist? */
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clock = of_clk_get_by_name(np, n);
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if (!IS_ERR(clock)) {
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clk_put(clock);
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return 0;
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}
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child = of_get_next_available_child(np, NULL);
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if (!child)
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return -ENODEV;
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clock = devm_get_clk_from_child(ddata->dev, child, name);
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if (IS_ERR(clock))
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return PTR_ERR(clock);
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/*
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* Use clkdev_add() instead of clkdev_alloc() to avoid the MAX_DEV_ID
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* limit for clk_get(). If cl ever needs to be freed, it should be done
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* with clkdev_drop().
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*/
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cl = kcalloc(1, sizeof(*cl), GFP_KERNEL);
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if (!cl)
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return -ENOMEM;
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cl->con_id = n;
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cl->dev_id = dev_name(ddata->dev);
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cl->clk = clock;
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clkdev_add(cl);
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clk_put(clock);
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return 0;
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}
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static int sysc_init_ext_opt_clock(struct sysc *ddata, const char *name)
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{
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const char *optfck_name;
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int error, index;
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if (ddata->nr_clocks < SYSC_OPTFCK0)
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index = SYSC_OPTFCK0;
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else
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index = ddata->nr_clocks;
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if (name)
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optfck_name = name;
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else
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optfck_name = clock_names[index];
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error = sysc_add_named_clock_from_child(ddata, name, optfck_name);
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if (error)
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return error;
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ddata->clock_roles[index] = optfck_name;
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ddata->nr_clocks++;
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return 0;
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}
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static int sysc_get_one_clock(struct sysc *ddata, const char *name)
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{
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int error, i, index = -ENODEV;
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if (!strncmp(clock_names[SYSC_FCK], name, 3))
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index = SYSC_FCK;
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else if (!strncmp(clock_names[SYSC_ICK], name, 3))
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index = SYSC_ICK;
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if (index < 0) {
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for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
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if (!ddata->clocks[i]) {
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index = i;
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break;
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}
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}
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}
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if (index < 0) {
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dev_err(ddata->dev, "clock %s not added\n", name);
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return index;
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}
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ddata->clocks[index] = devm_clk_get(ddata->dev, name);
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if (IS_ERR(ddata->clocks[index])) {
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dev_err(ddata->dev, "clock get error for %s: %li\n",
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name, PTR_ERR(ddata->clocks[index]));
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return PTR_ERR(ddata->clocks[index]);
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}
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error = clk_prepare(ddata->clocks[index]);
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if (error) {
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dev_err(ddata->dev, "clock prepare error for %s: %i\n",
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name, error);
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return error;
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}
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return 0;
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}
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static int sysc_get_clocks(struct sysc *ddata)
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{
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struct device_node *np = ddata->dev->of_node;
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struct property *prop;
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const char *name;
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int nr_fck = 0, nr_ick = 0, i, error = 0;
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ddata->clock_roles = devm_kcalloc(ddata->dev,
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SYSC_MAX_CLOCKS,
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sizeof(*ddata->clock_roles),
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GFP_KERNEL);
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if (!ddata->clock_roles)
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return -ENOMEM;
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of_property_for_each_string(np, "clock-names", prop, name) {
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if (!strncmp(clock_names[SYSC_FCK], name, 3))
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nr_fck++;
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if (!strncmp(clock_names[SYSC_ICK], name, 3))
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nr_ick++;
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ddata->clock_roles[ddata->nr_clocks] = name;
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ddata->nr_clocks++;
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}
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if (ddata->nr_clocks < 1)
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return 0;
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if ((ddata->cfg.quirks & SYSC_QUIRK_EXT_OPT_CLOCK)) {
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error = sysc_init_ext_opt_clock(ddata, NULL);
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if (error)
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return error;
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}
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if (ddata->nr_clocks > SYSC_MAX_CLOCKS) {
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dev_err(ddata->dev, "too many clocks for %pOF\n", np);
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return -EINVAL;
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}
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if (nr_fck > 1 || nr_ick > 1) {
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dev_err(ddata->dev, "max one fck and ick for %pOF\n", np);
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return -EINVAL;
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}
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ddata->clocks = devm_kcalloc(ddata->dev,
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ddata->nr_clocks, sizeof(*ddata->clocks),
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GFP_KERNEL);
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if (!ddata->clocks)
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return -ENOMEM;
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for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
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const char *name = ddata->clock_roles[i];
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if (!name)
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continue;
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error = sysc_get_one_clock(ddata, name);
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if (error)
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return error;
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}
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return 0;
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}
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static int sysc_enable_main_clocks(struct sysc *ddata)
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{
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struct clk *clock;
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int i, error;
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if (!ddata->clocks)
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return 0;
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for (i = 0; i < SYSC_OPTFCK0; i++) {
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clock = ddata->clocks[i];
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/* Main clocks may not have ick */
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if (IS_ERR_OR_NULL(clock))
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continue;
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error = clk_enable(clock);
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if (error)
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goto err_disable;
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}
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return 0;
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err_disable:
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for (i--; i >= 0; i--) {
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clock = ddata->clocks[i];
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/* Main clocks may not have ick */
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if (IS_ERR_OR_NULL(clock))
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continue;
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clk_disable(clock);
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}
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return error;
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}
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static void sysc_disable_main_clocks(struct sysc *ddata)
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{
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struct clk *clock;
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int i;
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if (!ddata->clocks)
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return;
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for (i = 0; i < SYSC_OPTFCK0; i++) {
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clock = ddata->clocks[i];
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if (IS_ERR_OR_NULL(clock))
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continue;
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clk_disable(clock);
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}
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}
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static int sysc_enable_opt_clocks(struct sysc *ddata)
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{
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struct clk *clock;
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int i, error;
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if (!ddata->clocks)
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return 0;
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for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
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clock = ddata->clocks[i];
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/* Assume no holes for opt clocks */
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if (IS_ERR_OR_NULL(clock))
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return 0;
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error = clk_enable(clock);
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if (error)
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goto err_disable;
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}
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return 0;
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err_disable:
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for (i--; i >= 0; i--) {
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clock = ddata->clocks[i];
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if (IS_ERR_OR_NULL(clock))
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continue;
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clk_disable(clock);
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}
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return error;
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}
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static void sysc_disable_opt_clocks(struct sysc *ddata)
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{
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struct clk *clock;
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int i;
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if (!ddata->clocks)
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return;
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for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
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clock = ddata->clocks[i];
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/* Assume no holes for opt clocks */
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if (IS_ERR_OR_NULL(clock))
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return;
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clk_disable(clock);
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}
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}
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static void sysc_clkdm_deny_idle(struct sysc *ddata)
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{
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struct ti_sysc_platform_data *pdata;
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if (ddata->legacy_mode)
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return;
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pdata = dev_get_platdata(ddata->dev);
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if (pdata && pdata->clkdm_deny_idle)
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pdata->clkdm_deny_idle(ddata->dev, &ddata->cookie);
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}
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static void sysc_clkdm_allow_idle(struct sysc *ddata)
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{
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struct ti_sysc_platform_data *pdata;
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if (ddata->legacy_mode)
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return;
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pdata = dev_get_platdata(ddata->dev);
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if (pdata && pdata->clkdm_allow_idle)
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pdata->clkdm_allow_idle(ddata->dev, &ddata->cookie);
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}
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/**
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* sysc_init_resets - init rstctrl reset line if configured
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* @ddata: device driver data
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*
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* See sysc_rstctrl_reset_deassert().
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*/
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static int sysc_init_resets(struct sysc *ddata)
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{
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ddata->rsts =
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devm_reset_control_get_optional_shared(ddata->dev, "rstctrl");
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if (IS_ERR(ddata->rsts))
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return PTR_ERR(ddata->rsts);
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return 0;
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}
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/**
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* sysc_parse_and_check_child_range - parses module IO region from ranges
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* @ddata: device driver data
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*
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* In general we only need rev, syss, and sysc registers and not the whole
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* module range. But we do want the offsets for these registers from the
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* module base. This allows us to check them against the legacy hwmod
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* platform data. Let's also check the ranges are configured properly.
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*/
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static int sysc_parse_and_check_child_range(struct sysc *ddata)
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{
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struct device_node *np = ddata->dev->of_node;
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const __be32 *ranges;
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u32 nr_addr, nr_size;
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int len, error;
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ranges = of_get_property(np, "ranges", &len);
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if (!ranges) {
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dev_err(ddata->dev, "missing ranges for %pOF\n", np);
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return -ENOENT;
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}
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len /= sizeof(*ranges);
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|
|
if (len < 3) {
|
|
dev_err(ddata->dev, "incomplete ranges for %pOF\n", np);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
error = of_property_read_u32(np, "#address-cells", &nr_addr);
|
|
if (error)
|
|
return -ENOENT;
|
|
|
|
error = of_property_read_u32(np, "#size-cells", &nr_size);
|
|
if (error)
|
|
return -ENOENT;
|
|
|
|
if (nr_addr != 1 || nr_size != 1) {
|
|
dev_err(ddata->dev, "invalid ranges for %pOF\n", np);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
ranges++;
|
|
ddata->module_pa = of_translate_address(np, ranges++);
|
|
ddata->module_size = be32_to_cpup(ranges);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct device_node *stdout_path;
|
|
|
|
static void sysc_init_stdout_path(struct sysc *ddata)
|
|
{
|
|
struct device_node *np = NULL;
|
|
const char *uart;
|
|
|
|
if (IS_ERR(stdout_path))
|
|
return;
|
|
|
|
if (stdout_path)
|
|
return;
|
|
|
|
np = of_find_node_by_path("/chosen");
|
|
if (!np)
|
|
goto err;
|
|
|
|
uart = of_get_property(np, "stdout-path", NULL);
|
|
if (!uart)
|
|
goto err;
|
|
|
|
np = of_find_node_by_path(uart);
|
|
if (!np)
|
|
goto err;
|
|
|
|
stdout_path = np;
|
|
|
|
return;
|
|
|
|
err:
|
|
stdout_path = ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static void sysc_check_quirk_stdout(struct sysc *ddata,
|
|
struct device_node *np)
|
|
{
|
|
sysc_init_stdout_path(ddata);
|
|
if (np != stdout_path)
|
|
return;
|
|
|
|
ddata->cfg.quirks |= SYSC_QUIRK_NO_IDLE_ON_INIT |
|
|
SYSC_QUIRK_NO_RESET_ON_INIT;
|
|
}
|
|
|
|
/**
|
|
* sysc_check_one_child - check child configuration
|
|
* @ddata: device driver data
|
|
* @np: child device node
|
|
*
|
|
* Let's avoid messy situations where we have new interconnect target
|
|
* node but children have "ti,hwmods". These belong to the interconnect
|
|
* target node and are managed by this driver.
|
|
*/
|
|
static void sysc_check_one_child(struct sysc *ddata,
|
|
struct device_node *np)
|
|
{
|
|
const char *name;
|
|
|
|
name = of_get_property(np, "ti,hwmods", NULL);
|
|
if (name)
|
|
dev_warn(ddata->dev, "really a child ti,hwmods property?");
|
|
|
|
sysc_check_quirk_stdout(ddata, np);
|
|
sysc_parse_dts_quirks(ddata, np, true);
|
|
}
|
|
|
|
static void sysc_check_children(struct sysc *ddata)
|
|
{
|
|
struct device_node *child;
|
|
|
|
for_each_child_of_node(ddata->dev->of_node, child)
|
|
sysc_check_one_child(ddata, child);
|
|
}
|
|
|
|
/*
|
|
* So far only I2C uses 16-bit read access with clockactivity with revision
|
|
* in two registers with stride of 4. We can detect this based on the rev
|
|
* register size to configure things far enough to be able to properly read
|
|
* the revision register.
|
|
*/
|
|
static void sysc_check_quirk_16bit(struct sysc *ddata, struct resource *res)
|
|
{
|
|
if (resource_size(res) == 8)
|
|
ddata->cfg.quirks |= SYSC_QUIRK_16BIT | SYSC_QUIRK_USE_CLOCKACT;
|
|
}
|
|
|
|
/**
|
|
* sysc_parse_one - parses the interconnect target module registers
|
|
* @ddata: device driver data
|
|
* @reg: register to parse
|
|
*/
|
|
static int sysc_parse_one(struct sysc *ddata, enum sysc_registers reg)
|
|
{
|
|
struct resource *res;
|
|
const char *name;
|
|
|
|
switch (reg) {
|
|
case SYSC_REVISION:
|
|
case SYSC_SYSCONFIG:
|
|
case SYSC_SYSSTATUS:
|
|
name = reg_names[reg];
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
res = platform_get_resource_byname(to_platform_device(ddata->dev),
|
|
IORESOURCE_MEM, name);
|
|
if (!res) {
|
|
ddata->offsets[reg] = -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
ddata->offsets[reg] = res->start - ddata->module_pa;
|
|
if (reg == SYSC_REVISION)
|
|
sysc_check_quirk_16bit(ddata, res);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sysc_parse_registers(struct sysc *ddata)
|
|
{
|
|
int i, error;
|
|
|
|
for (i = 0; i < SYSC_MAX_REGS; i++) {
|
|
error = sysc_parse_one(ddata, i);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sysc_check_registers - check for misconfigured register overlaps
|
|
* @ddata: device driver data
|
|
*/
|
|
static int sysc_check_registers(struct sysc *ddata)
|
|
{
|
|
int i, j, nr_regs = 0, nr_matches = 0;
|
|
|
|
for (i = 0; i < SYSC_MAX_REGS; i++) {
|
|
if (ddata->offsets[i] < 0)
|
|
continue;
|
|
|
|
if (ddata->offsets[i] > (ddata->module_size - 4)) {
|
|
dev_err(ddata->dev, "register outside module range");
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (j = 0; j < SYSC_MAX_REGS; j++) {
|
|
if (ddata->offsets[j] < 0)
|
|
continue;
|
|
|
|
if (ddata->offsets[i] == ddata->offsets[j])
|
|
nr_matches++;
|
|
}
|
|
nr_regs++;
|
|
}
|
|
|
|
if (nr_matches > nr_regs) {
|
|
dev_err(ddata->dev, "overlapping registers: (%i/%i)",
|
|
nr_regs, nr_matches);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* syc_ioremap - ioremap register space for the interconnect target module
|
|
* @ddata: device driver data
|
|
*
|
|
* Note that the interconnect target module registers can be anywhere
|
|
* within the interconnect target module range. For example, SGX has
|
|
* them at offset 0x1fc00 in the 32MB module address space. And cpsw
|
|
* has them at offset 0x1200 in the CPSW_WR child. Usually the
|
|
* the interconnect target module registers are at the beginning of
|
|
* the module range though.
|
|
*/
|
|
static int sysc_ioremap(struct sysc *ddata)
|
|
{
|
|
int size;
|
|
|
|
if (ddata->offsets[SYSC_REVISION] < 0 &&
|
|
ddata->offsets[SYSC_SYSCONFIG] < 0 &&
|
|
ddata->offsets[SYSC_SYSSTATUS] < 0) {
|
|
size = ddata->module_size;
|
|
} else {
|
|
size = max3(ddata->offsets[SYSC_REVISION],
|
|
ddata->offsets[SYSC_SYSCONFIG],
|
|
ddata->offsets[SYSC_SYSSTATUS]);
|
|
|
|
if (size < SZ_1K)
|
|
size = SZ_1K;
|
|
|
|
if ((size + sizeof(u32)) > ddata->module_size)
|
|
size = ddata->module_size;
|
|
}
|
|
|
|
ddata->module_va = devm_ioremap(ddata->dev,
|
|
ddata->module_pa,
|
|
size + sizeof(u32));
|
|
if (!ddata->module_va)
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sysc_map_and_check_registers - ioremap and check device registers
|
|
* @ddata: device driver data
|
|
*/
|
|
static int sysc_map_and_check_registers(struct sysc *ddata)
|
|
{
|
|
int error;
|
|
|
|
error = sysc_parse_and_check_child_range(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
sysc_check_children(ddata);
|
|
|
|
error = sysc_parse_registers(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_ioremap(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_check_registers(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sysc_show_rev - read and show interconnect target module revision
|
|
* @bufp: buffer to print the information to
|
|
* @ddata: device driver data
|
|
*/
|
|
static int sysc_show_rev(char *bufp, struct sysc *ddata)
|
|
{
|
|
int len;
|
|
|
|
if (ddata->offsets[SYSC_REVISION] < 0)
|
|
return sprintf(bufp, ":NA");
|
|
|
|
len = sprintf(bufp, ":%08x", ddata->revision);
|
|
|
|
return len;
|
|
}
|
|
|
|
static int sysc_show_reg(struct sysc *ddata,
|
|
char *bufp, enum sysc_registers reg)
|
|
{
|
|
if (ddata->offsets[reg] < 0)
|
|
return sprintf(bufp, ":NA");
|
|
|
|
return sprintf(bufp, ":%x", ddata->offsets[reg]);
|
|
}
|
|
|
|
static int sysc_show_name(char *bufp, struct sysc *ddata)
|
|
{
|
|
if (!ddata->name)
|
|
return 0;
|
|
|
|
return sprintf(bufp, ":%s", ddata->name);
|
|
}
|
|
|
|
/**
|
|
* sysc_show_registers - show information about interconnect target module
|
|
* @ddata: device driver data
|
|
*/
|
|
static void sysc_show_registers(struct sysc *ddata)
|
|
{
|
|
char buf[128];
|
|
char *bufp = buf;
|
|
int i;
|
|
|
|
for (i = 0; i < SYSC_MAX_REGS; i++)
|
|
bufp += sysc_show_reg(ddata, bufp, i);
|
|
|
|
bufp += sysc_show_rev(bufp, ddata);
|
|
bufp += sysc_show_name(bufp, ddata);
|
|
|
|
dev_dbg(ddata->dev, "%llx:%x%s\n",
|
|
ddata->module_pa, ddata->module_size,
|
|
buf);
|
|
}
|
|
|
|
#define SYSC_IDLE_MASK (SYSC_NR_IDLEMODES - 1)
|
|
#define SYSC_CLOCACT_ICK 2
|
|
|
|
/* Caller needs to manage sysc_clkdm_deny_idle() and sysc_clkdm_allow_idle() */
|
|
static int sysc_enable_module(struct device *dev)
|
|
{
|
|
struct sysc *ddata;
|
|
const struct sysc_regbits *regbits;
|
|
u32 reg, idlemodes, best_mode;
|
|
|
|
ddata = dev_get_drvdata(dev);
|
|
if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV)
|
|
return 0;
|
|
|
|
regbits = ddata->cap->regbits;
|
|
reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
|
|
|
|
/* Set CLOCKACTIVITY, we only use it for ick */
|
|
if (regbits->clkact_shift >= 0 &&
|
|
(ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT ||
|
|
ddata->cfg.sysc_val & BIT(regbits->clkact_shift)))
|
|
reg |= SYSC_CLOCACT_ICK << regbits->clkact_shift;
|
|
|
|
/* Set SIDLE mode */
|
|
idlemodes = ddata->cfg.sidlemodes;
|
|
if (!idlemodes || regbits->sidle_shift < 0)
|
|
goto set_midle;
|
|
|
|
if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_SIDLE |
|
|
SYSC_QUIRK_SWSUP_SIDLE_ACT)) {
|
|
best_mode = SYSC_IDLE_NO;
|
|
} else {
|
|
best_mode = fls(ddata->cfg.sidlemodes) - 1;
|
|
if (best_mode > SYSC_IDLE_MASK) {
|
|
dev_err(dev, "%s: invalid sidlemode\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Set WAKEUP */
|
|
if (regbits->enwkup_shift >= 0 &&
|
|
ddata->cfg.sysc_val & BIT(regbits->enwkup_shift))
|
|
reg |= BIT(regbits->enwkup_shift);
|
|
}
|
|
|
|
reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift);
|
|
reg |= best_mode << regbits->sidle_shift;
|
|
sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
|
|
|
|
set_midle:
|
|
/* Set MIDLE mode */
|
|
idlemodes = ddata->cfg.midlemodes;
|
|
if (!idlemodes || regbits->midle_shift < 0)
|
|
goto set_autoidle;
|
|
|
|
best_mode = fls(ddata->cfg.midlemodes) - 1;
|
|
if (best_mode > SYSC_IDLE_MASK) {
|
|
dev_err(dev, "%s: invalid midlemode\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_MSTANDBY)
|
|
best_mode = SYSC_IDLE_NO;
|
|
|
|
reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);
|
|
reg |= best_mode << regbits->midle_shift;
|
|
sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
|
|
|
|
set_autoidle:
|
|
/* Autoidle bit must enabled separately if available */
|
|
if (regbits->autoidle_shift >= 0 &&
|
|
ddata->cfg.sysc_val & BIT(regbits->autoidle_shift)) {
|
|
reg |= 1 << regbits->autoidle_shift;
|
|
sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
|
|
}
|
|
|
|
if (ddata->module_enable_quirk)
|
|
ddata->module_enable_quirk(ddata);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sysc_best_idle_mode(u32 idlemodes, u32 *best_mode)
|
|
{
|
|
if (idlemodes & BIT(SYSC_IDLE_SMART_WKUP))
|
|
*best_mode = SYSC_IDLE_SMART_WKUP;
|
|
else if (idlemodes & BIT(SYSC_IDLE_SMART))
|
|
*best_mode = SYSC_IDLE_SMART;
|
|
else if (idlemodes & BIT(SYSC_IDLE_FORCE))
|
|
*best_mode = SYSC_IDLE_FORCE;
|
|
else
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Caller needs to manage sysc_clkdm_deny_idle() and sysc_clkdm_allow_idle() */
|
|
static int sysc_disable_module(struct device *dev)
|
|
{
|
|
struct sysc *ddata;
|
|
const struct sysc_regbits *regbits;
|
|
u32 reg, idlemodes, best_mode;
|
|
int ret;
|
|
|
|
ddata = dev_get_drvdata(dev);
|
|
if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV)
|
|
return 0;
|
|
|
|
if (ddata->module_disable_quirk)
|
|
ddata->module_disable_quirk(ddata);
|
|
|
|
regbits = ddata->cap->regbits;
|
|
reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
|
|
|
|
/* Set MIDLE mode */
|
|
idlemodes = ddata->cfg.midlemodes;
|
|
if (!idlemodes || regbits->midle_shift < 0)
|
|
goto set_sidle;
|
|
|
|
ret = sysc_best_idle_mode(idlemodes, &best_mode);
|
|
if (ret) {
|
|
dev_err(dev, "%s: invalid midlemode\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_MSTANDBY) ||
|
|
ddata->cfg.quirks & (SYSC_QUIRK_FORCE_MSTANDBY))
|
|
best_mode = SYSC_IDLE_FORCE;
|
|
|
|
reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);
|
|
reg |= best_mode << regbits->midle_shift;
|
|
sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
|
|
|
|
set_sidle:
|
|
/* Set SIDLE mode */
|
|
idlemodes = ddata->cfg.sidlemodes;
|
|
if (!idlemodes || regbits->sidle_shift < 0)
|
|
return 0;
|
|
|
|
if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_SIDLE) {
|
|
best_mode = SYSC_IDLE_FORCE;
|
|
} else {
|
|
ret = sysc_best_idle_mode(idlemodes, &best_mode);
|
|
if (ret) {
|
|
dev_err(dev, "%s: invalid sidlemode\n", __func__);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift);
|
|
reg |= best_mode << regbits->sidle_shift;
|
|
if (regbits->autoidle_shift >= 0 &&
|
|
ddata->cfg.sysc_val & BIT(regbits->autoidle_shift))
|
|
reg |= 1 << regbits->autoidle_shift;
|
|
sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused sysc_runtime_suspend_legacy(struct device *dev,
|
|
struct sysc *ddata)
|
|
{
|
|
struct ti_sysc_platform_data *pdata;
|
|
int error;
|
|
|
|
pdata = dev_get_platdata(ddata->dev);
|
|
if (!pdata)
|
|
return 0;
|
|
|
|
if (!pdata->idle_module)
|
|
return -ENODEV;
|
|
|
|
error = pdata->idle_module(dev, &ddata->cookie);
|
|
if (error)
|
|
dev_err(dev, "%s: could not idle: %i\n",
|
|
__func__, error);
|
|
|
|
reset_control_assert(ddata->rsts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused sysc_runtime_resume_legacy(struct device *dev,
|
|
struct sysc *ddata)
|
|
{
|
|
struct ti_sysc_platform_data *pdata;
|
|
int error;
|
|
|
|
pdata = dev_get_platdata(ddata->dev);
|
|
if (!pdata)
|
|
return 0;
|
|
|
|
if (!pdata->enable_module)
|
|
return -ENODEV;
|
|
|
|
error = pdata->enable_module(dev, &ddata->cookie);
|
|
if (error)
|
|
dev_err(dev, "%s: could not enable: %i\n",
|
|
__func__, error);
|
|
|
|
reset_control_deassert(ddata->rsts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused sysc_runtime_suspend(struct device *dev)
|
|
{
|
|
struct sysc *ddata;
|
|
int error = 0;
|
|
|
|
ddata = dev_get_drvdata(dev);
|
|
|
|
if (!ddata->enabled)
|
|
return 0;
|
|
|
|
sysc_clkdm_deny_idle(ddata);
|
|
|
|
if (ddata->legacy_mode) {
|
|
error = sysc_runtime_suspend_legacy(dev, ddata);
|
|
if (error)
|
|
goto err_allow_idle;
|
|
} else {
|
|
error = sysc_disable_module(dev);
|
|
if (error)
|
|
goto err_allow_idle;
|
|
}
|
|
|
|
sysc_disable_main_clocks(ddata);
|
|
|
|
if (sysc_opt_clks_needed(ddata))
|
|
sysc_disable_opt_clocks(ddata);
|
|
|
|
ddata->enabled = false;
|
|
|
|
err_allow_idle:
|
|
reset_control_assert(ddata->rsts);
|
|
|
|
sysc_clkdm_allow_idle(ddata);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int __maybe_unused sysc_runtime_resume(struct device *dev)
|
|
{
|
|
struct sysc *ddata;
|
|
int error = 0;
|
|
|
|
ddata = dev_get_drvdata(dev);
|
|
|
|
if (ddata->enabled)
|
|
return 0;
|
|
|
|
|
|
sysc_clkdm_deny_idle(ddata);
|
|
|
|
if (sysc_opt_clks_needed(ddata)) {
|
|
error = sysc_enable_opt_clocks(ddata);
|
|
if (error)
|
|
goto err_allow_idle;
|
|
}
|
|
|
|
error = sysc_enable_main_clocks(ddata);
|
|
if (error)
|
|
goto err_opt_clocks;
|
|
|
|
reset_control_deassert(ddata->rsts);
|
|
|
|
if (ddata->legacy_mode) {
|
|
error = sysc_runtime_resume_legacy(dev, ddata);
|
|
if (error)
|
|
goto err_main_clocks;
|
|
} else {
|
|
error = sysc_enable_module(dev);
|
|
if (error)
|
|
goto err_main_clocks;
|
|
}
|
|
|
|
ddata->enabled = true;
|
|
|
|
sysc_clkdm_allow_idle(ddata);
|
|
|
|
return 0;
|
|
|
|
err_main_clocks:
|
|
sysc_disable_main_clocks(ddata);
|
|
err_opt_clocks:
|
|
if (sysc_opt_clks_needed(ddata))
|
|
sysc_disable_opt_clocks(ddata);
|
|
err_allow_idle:
|
|
sysc_clkdm_allow_idle(ddata);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int __maybe_unused sysc_noirq_suspend(struct device *dev)
|
|
{
|
|
struct sysc *ddata;
|
|
|
|
ddata = dev_get_drvdata(dev);
|
|
|
|
if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
|
|
return 0;
|
|
|
|
return pm_runtime_force_suspend(dev);
|
|
}
|
|
|
|
static int __maybe_unused sysc_noirq_resume(struct device *dev)
|
|
{
|
|
struct sysc *ddata;
|
|
|
|
ddata = dev_get_drvdata(dev);
|
|
|
|
if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
|
|
return 0;
|
|
|
|
return pm_runtime_force_resume(dev);
|
|
}
|
|
|
|
static const struct dev_pm_ops sysc_pm_ops = {
|
|
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_noirq_suspend, sysc_noirq_resume)
|
|
SET_RUNTIME_PM_OPS(sysc_runtime_suspend,
|
|
sysc_runtime_resume,
|
|
NULL)
|
|
};
|
|
|
|
/* Module revision register based quirks */
|
|
struct sysc_revision_quirk {
|
|
const char *name;
|
|
u32 base;
|
|
int rev_offset;
|
|
int sysc_offset;
|
|
int syss_offset;
|
|
u32 revision;
|
|
u32 revision_mask;
|
|
u32 quirks;
|
|
};
|
|
|
|
#define SYSC_QUIRK(optname, optbase, optrev, optsysc, optsyss, \
|
|
optrev_val, optrevmask, optquirkmask) \
|
|
{ \
|
|
.name = (optname), \
|
|
.base = (optbase), \
|
|
.rev_offset = (optrev), \
|
|
.sysc_offset = (optsysc), \
|
|
.syss_offset = (optsyss), \
|
|
.revision = (optrev_val), \
|
|
.revision_mask = (optrevmask), \
|
|
.quirks = (optquirkmask), \
|
|
}
|
|
|
|
static const struct sysc_revision_quirk sysc_revision_quirks[] = {
|
|
/* These drivers need to be fixed to not use pm_runtime_irq_safe() */
|
|
SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffff00ff,
|
|
SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET),
|
|
SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
|
|
SYSC_QUIRK_LEGACY_IDLE),
|
|
SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000030, 0xffffffff,
|
|
SYSC_QUIRK_LEGACY_IDLE),
|
|
SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff,
|
|
SYSC_QUIRK_LEGACY_IDLE),
|
|
SYSC_QUIRK("smartreflex", 0, -1, 0x24, -1, 0x00000000, 0xffffffff,
|
|
SYSC_QUIRK_LEGACY_IDLE),
|
|
SYSC_QUIRK("smartreflex", 0, -1, 0x38, -1, 0x00000000, 0xffffffff,
|
|
SYSC_QUIRK_LEGACY_IDLE),
|
|
SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000015, 0xffffffff,
|
|
0),
|
|
/* Some timers on omap4 and later */
|
|
SYSC_QUIRK("timer", 0, 0, 0x10, -1, 0x50002100, 0xffffffff,
|
|
0),
|
|
SYSC_QUIRK("timer", 0, 0, 0x10, -1, 0x4fff1301, 0xffff00ff,
|
|
0),
|
|
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000046, 0xffffffff,
|
|
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
|
|
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff,
|
|
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
|
|
/* Uarts on omap4 and later */
|
|
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffff00ff,
|
|
SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
|
|
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47422e03, 0xffffffff,
|
|
SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
|
|
|
|
/* Quirks that need to be set based on the module address */
|
|
SYSC_QUIRK("mcpdm", 0x40132000, 0, 0x10, -1, 0x50000800, 0xffffffff,
|
|
SYSC_QUIRK_EXT_OPT_CLOCK | SYSC_QUIRK_NO_RESET_ON_INIT |
|
|
SYSC_QUIRK_SWSUP_SIDLE),
|
|
|
|
/* Quirks that need to be set based on detected module */
|
|
SYSC_QUIRK("aess", 0, 0, 0x10, -1, 0x40000000, 0xffffffff,
|
|
SYSC_MODULE_QUIRK_AESS),
|
|
SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff,
|
|
SYSC_MODULE_QUIRK_HDQ1W),
|
|
SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x0000000a, 0xffffffff,
|
|
SYSC_MODULE_QUIRK_HDQ1W),
|
|
SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000036, 0x000000ff,
|
|
SYSC_MODULE_QUIRK_I2C),
|
|
SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x0000003c, 0x000000ff,
|
|
SYSC_MODULE_QUIRK_I2C),
|
|
SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000040, 0x000000ff,
|
|
SYSC_MODULE_QUIRK_I2C),
|
|
SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xfffff0f0,
|
|
SYSC_MODULE_QUIRK_I2C),
|
|
SYSC_QUIRK("gpu", 0x50000000, 0x14, -1, -1, 0x00010201, 0xffffffff, 0),
|
|
SYSC_QUIRK("gpu", 0x50000000, 0xfe00, 0xfe10, -1, 0x40000000 , 0xffffffff,
|
|
SYSC_MODULE_QUIRK_SGX),
|
|
SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
|
|
0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
|
|
SYSC_QUIRK("usb_otg_hs", 0, 0, 0x10, -1, 0x4ea2080d, 0xffffffff,
|
|
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
|
|
SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0,
|
|
SYSC_MODULE_QUIRK_WDT),
|
|
/* Watchdog on am3 and am4 */
|
|
SYSC_QUIRK("wdt", 0x44e35000, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0,
|
|
SYSC_MODULE_QUIRK_WDT | SYSC_QUIRK_SWSUP_SIDLE),
|
|
|
|
#ifdef DEBUG
|
|
SYSC_QUIRK("adc", 0, 0, 0x10, -1, 0x47300001, 0xffffffff, 0),
|
|
SYSC_QUIRK("atl", 0, 0, -1, -1, 0x0a070100, 0xffffffff, 0),
|
|
SYSC_QUIRK("cm", 0, 0, -1, -1, 0x40000301, 0xffffffff, 0),
|
|
SYSC_QUIRK("control", 0, 0, 0x10, -1, 0x40000900, 0xffffffff, 0),
|
|
SYSC_QUIRK("cpgmac", 0, 0x1200, 0x1208, 0x1204, 0x4edb1902,
|
|
0xffff00f0, 0),
|
|
SYSC_QUIRK("dcan", 0, 0x20, -1, -1, 0xa3170504, 0xffffffff, 0),
|
|
SYSC_QUIRK("dcan", 0, 0x20, -1, -1, 0x4edb1902, 0xffffffff, 0),
|
|
SYSC_QUIRK("dmic", 0, 0, 0x10, -1, 0x50010000, 0xffffffff, 0),
|
|
SYSC_QUIRK("dwc3", 0, 0, 0x10, -1, 0x500a0200, 0xffffffff, 0),
|
|
SYSC_QUIRK("d2d", 0x4a0b6000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
|
|
SYSC_QUIRK("d2d", 0x4a0cd000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
|
|
SYSC_QUIRK("epwmss", 0, 0, 0x4, -1, 0x47400001, 0xffffffff, 0),
|
|
SYSC_QUIRK("gpu", 0, 0x1fc00, 0x1fc10, -1, 0, 0, 0),
|
|
SYSC_QUIRK("gpu", 0, 0xfe00, 0xfe10, -1, 0x40000000 , 0xffffffff, 0),
|
|
SYSC_QUIRK("hsi", 0, 0, 0x10, 0x14, 0x50043101, 0xffffffff, 0),
|
|
SYSC_QUIRK("iss", 0, 0, 0x10, -1, 0x40000101, 0xffffffff, 0),
|
|
SYSC_QUIRK("lcdc", 0, 0, 0x54, -1, 0x4f201000, 0xffffffff, 0),
|
|
SYSC_QUIRK("mcasp", 0, 0, 0x4, -1, 0x44306302, 0xffffffff, 0),
|
|
SYSC_QUIRK("mcasp", 0, 0, 0x4, -1, 0x44307b02, 0xffffffff, 0),
|
|
SYSC_QUIRK("mcbsp", 0, -1, 0x8c, -1, 0, 0, 0),
|
|
SYSC_QUIRK("mcspi", 0, 0, 0x10, -1, 0x40300a0b, 0xffff00ff, 0),
|
|
SYSC_QUIRK("mcspi", 0, 0, 0x110, 0x114, 0x40300a0b, 0xffffffff, 0),
|
|
SYSC_QUIRK("mailbox", 0, 0, 0x10, -1, 0x00000400, 0xffffffff, 0),
|
|
SYSC_QUIRK("m3", 0, 0, -1, -1, 0x5f580105, 0x0fff0f00, 0),
|
|
SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xfffffff0, 0),
|
|
SYSC_QUIRK("ocp2scp", 0, 0, -1, -1, 0x50060007, 0xffffffff, 0),
|
|
SYSC_QUIRK("padconf", 0, 0, 0x10, -1, 0x4fff0800, 0xffffffff, 0),
|
|
SYSC_QUIRK("padconf", 0, 0, -1, -1, 0x40001100, 0xffffffff, 0),
|
|
SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000100, 0xffffffff, 0),
|
|
SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x00004102, 0xffffffff, 0),
|
|
SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000400, 0xffffffff, 0),
|
|
SYSC_QUIRK("scm", 0, 0, 0x10, -1, 0x40000900, 0xffffffff, 0),
|
|
SYSC_QUIRK("scm", 0, 0, -1, -1, 0x4e8b0100, 0xffffffff, 0),
|
|
SYSC_QUIRK("scm", 0, 0, -1, -1, 0x4f000100, 0xffffffff, 0),
|
|
SYSC_QUIRK("scm", 0, 0, -1, -1, 0x40000900, 0xffffffff, 0),
|
|
SYSC_QUIRK("scrm", 0, 0, -1, -1, 0x00000010, 0xffffffff, 0),
|
|
SYSC_QUIRK("sdio", 0, 0, 0x10, -1, 0x40202301, 0xffff0ff0, 0),
|
|
SYSC_QUIRK("sdio", 0, 0x2fc, 0x110, 0x114, 0x31010000, 0xffffffff, 0),
|
|
SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff, 0),
|
|
SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40000902, 0xffffffff, 0),
|
|
SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40002903, 0xffffffff, 0),
|
|
SYSC_QUIRK("spinlock", 0, 0, 0x10, -1, 0x50020000, 0xffffffff, 0),
|
|
SYSC_QUIRK("rng", 0, 0x1fe0, 0x1fe4, -1, 0x00000020, 0xffffffff, 0),
|
|
SYSC_QUIRK("rtc", 0, 0x74, 0x78, -1, 0x4eb01908, 0xffff00f0, 0),
|
|
SYSC_QUIRK("timer32k", 0, 0, 0x4, -1, 0x00000060, 0xffffffff, 0),
|
|
SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000004, 0xffffffff, 0),
|
|
SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000008, 0xffffffff, 0),
|
|
SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff, 0),
|
|
SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, -1, 0x50700101, 0xffffffff, 0),
|
|
SYSC_QUIRK("vfpe", 0, 0, 0x104, -1, 0x4d001200, 0xffffffff, 0),
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Early quirks based on module base and register offsets only that are
|
|
* needed before the module revision can be read
|
|
*/
|
|
static void sysc_init_early_quirks(struct sysc *ddata)
|
|
{
|
|
const struct sysc_revision_quirk *q;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) {
|
|
q = &sysc_revision_quirks[i];
|
|
|
|
if (!q->base)
|
|
continue;
|
|
|
|
if (q->base != ddata->module_pa)
|
|
continue;
|
|
|
|
if (q->rev_offset >= 0 &&
|
|
q->rev_offset != ddata->offsets[SYSC_REVISION])
|
|
continue;
|
|
|
|
if (q->sysc_offset >= 0 &&
|
|
q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG])
|
|
continue;
|
|
|
|
if (q->syss_offset >= 0 &&
|
|
q->syss_offset != ddata->offsets[SYSC_SYSSTATUS])
|
|
continue;
|
|
|
|
ddata->name = q->name;
|
|
ddata->cfg.quirks |= q->quirks;
|
|
}
|
|
}
|
|
|
|
/* Quirks that also consider the revision register value */
|
|
static void sysc_init_revision_quirks(struct sysc *ddata)
|
|
{
|
|
const struct sysc_revision_quirk *q;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) {
|
|
q = &sysc_revision_quirks[i];
|
|
|
|
if (q->base && q->base != ddata->module_pa)
|
|
continue;
|
|
|
|
if (q->rev_offset >= 0 &&
|
|
q->rev_offset != ddata->offsets[SYSC_REVISION])
|
|
continue;
|
|
|
|
if (q->sysc_offset >= 0 &&
|
|
q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG])
|
|
continue;
|
|
|
|
if (q->syss_offset >= 0 &&
|
|
q->syss_offset != ddata->offsets[SYSC_SYSSTATUS])
|
|
continue;
|
|
|
|
if (q->revision == ddata->revision ||
|
|
(q->revision & q->revision_mask) ==
|
|
(ddata->revision & q->revision_mask)) {
|
|
ddata->name = q->name;
|
|
ddata->cfg.quirks |= q->quirks;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 1-wire needs module's internal clocks enabled for reset */
|
|
static void sysc_clk_enable_quirk_hdq1w(struct sysc *ddata)
|
|
{
|
|
int offset = 0x0c; /* HDQ_CTRL_STATUS */
|
|
u16 val;
|
|
|
|
val = sysc_read(ddata, offset);
|
|
val |= BIT(5);
|
|
sysc_write(ddata, offset, val);
|
|
}
|
|
|
|
/* AESS (Audio Engine SubSystem) needs autogating set after enable */
|
|
static void sysc_module_enable_quirk_aess(struct sysc *ddata)
|
|
{
|
|
int offset = 0x7c; /* AESS_AUTO_GATING_ENABLE */
|
|
|
|
sysc_write(ddata, offset, 1);
|
|
}
|
|
|
|
/* I2C needs extra enable bit toggling for reset */
|
|
static void sysc_clk_quirk_i2c(struct sysc *ddata, bool enable)
|
|
{
|
|
int offset;
|
|
u16 val;
|
|
|
|
/* I2C_CON, omap2/3 is different from omap4 and later */
|
|
if ((ddata->revision & 0xffffff00) == 0x001f0000)
|
|
offset = 0x24;
|
|
else
|
|
offset = 0xa4;
|
|
|
|
/* I2C_EN */
|
|
val = sysc_read(ddata, offset);
|
|
if (enable)
|
|
val |= BIT(15);
|
|
else
|
|
val &= ~BIT(15);
|
|
sysc_write(ddata, offset, val);
|
|
}
|
|
|
|
static void sysc_clk_enable_quirk_i2c(struct sysc *ddata)
|
|
{
|
|
sysc_clk_quirk_i2c(ddata, true);
|
|
}
|
|
|
|
static void sysc_clk_disable_quirk_i2c(struct sysc *ddata)
|
|
{
|
|
sysc_clk_quirk_i2c(ddata, false);
|
|
}
|
|
|
|
/* 36xx SGX needs a quirk for to bypass OCP IPG interrupt logic */
|
|
static void sysc_module_enable_quirk_sgx(struct sysc *ddata)
|
|
{
|
|
int offset = 0xff08; /* OCP_DEBUG_CONFIG */
|
|
u32 val = BIT(31); /* THALIA_INT_BYPASS */
|
|
|
|
sysc_write(ddata, offset, val);
|
|
}
|
|
|
|
/* Watchdog timer needs a disable sequence after reset */
|
|
static void sysc_reset_done_quirk_wdt(struct sysc *ddata)
|
|
{
|
|
int wps, spr, error;
|
|
u32 val;
|
|
|
|
wps = 0x34;
|
|
spr = 0x48;
|
|
|
|
sysc_write(ddata, spr, 0xaaaa);
|
|
error = readl_poll_timeout(ddata->module_va + wps, val,
|
|
!(val & 0x10), 100,
|
|
MAX_MODULE_SOFTRESET_WAIT);
|
|
if (error)
|
|
dev_warn(ddata->dev, "wdt disable step1 failed\n");
|
|
|
|
sysc_write(ddata, spr, 0x5555);
|
|
error = readl_poll_timeout(ddata->module_va + wps, val,
|
|
!(val & 0x10), 100,
|
|
MAX_MODULE_SOFTRESET_WAIT);
|
|
if (error)
|
|
dev_warn(ddata->dev, "wdt disable step2 failed\n");
|
|
}
|
|
|
|
static void sysc_init_module_quirks(struct sysc *ddata)
|
|
{
|
|
if (ddata->legacy_mode || !ddata->name)
|
|
return;
|
|
|
|
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_HDQ1W) {
|
|
ddata->clk_enable_quirk = sysc_clk_enable_quirk_hdq1w;
|
|
|
|
return;
|
|
}
|
|
|
|
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_I2C) {
|
|
ddata->clk_enable_quirk = sysc_clk_enable_quirk_i2c;
|
|
ddata->clk_disable_quirk = sysc_clk_disable_quirk_i2c;
|
|
|
|
return;
|
|
}
|
|
|
|
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_AESS)
|
|
ddata->module_enable_quirk = sysc_module_enable_quirk_aess;
|
|
|
|
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_SGX)
|
|
ddata->module_enable_quirk = sysc_module_enable_quirk_sgx;
|
|
|
|
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_WDT) {
|
|
ddata->reset_done_quirk = sysc_reset_done_quirk_wdt;
|
|
ddata->module_disable_quirk = sysc_reset_done_quirk_wdt;
|
|
}
|
|
}
|
|
|
|
static int sysc_clockdomain_init(struct sysc *ddata)
|
|
{
|
|
struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
|
|
struct clk *fck = NULL, *ick = NULL;
|
|
int error;
|
|
|
|
if (!pdata || !pdata->init_clockdomain)
|
|
return 0;
|
|
|
|
switch (ddata->nr_clocks) {
|
|
case 2:
|
|
ick = ddata->clocks[SYSC_ICK];
|
|
/* fallthrough */
|
|
case 1:
|
|
fck = ddata->clocks[SYSC_FCK];
|
|
break;
|
|
case 0:
|
|
return 0;
|
|
}
|
|
|
|
error = pdata->init_clockdomain(ddata->dev, fck, ick, &ddata->cookie);
|
|
if (!error || error == -ENODEV)
|
|
return 0;
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Note that pdata->init_module() typically does a reset first. After
|
|
* pdata->init_module() is done, PM runtime can be used for the interconnect
|
|
* target module.
|
|
*/
|
|
static int sysc_legacy_init(struct sysc *ddata)
|
|
{
|
|
struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
|
|
int error;
|
|
|
|
if (!pdata || !pdata->init_module)
|
|
return 0;
|
|
|
|
error = pdata->init_module(ddata->dev, ddata->mdata, &ddata->cookie);
|
|
if (error == -EEXIST)
|
|
error = 0;
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Note that the caller must ensure the interconnect target module is enabled
|
|
* before calling reset. Otherwise reset will not complete.
|
|
*/
|
|
static int sysc_reset(struct sysc *ddata)
|
|
{
|
|
int sysc_offset, syss_offset, sysc_val, rstval, error = 0;
|
|
u32 sysc_mask, syss_done;
|
|
|
|
sysc_offset = ddata->offsets[SYSC_SYSCONFIG];
|
|
syss_offset = ddata->offsets[SYSC_SYSSTATUS];
|
|
|
|
if (ddata->legacy_mode || sysc_offset < 0 ||
|
|
ddata->cap->regbits->srst_shift < 0 ||
|
|
ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
|
|
return 0;
|
|
|
|
sysc_mask = BIT(ddata->cap->regbits->srst_shift);
|
|
|
|
if (ddata->cfg.quirks & SYSS_QUIRK_RESETDONE_INVERTED)
|
|
syss_done = 0;
|
|
else
|
|
syss_done = ddata->cfg.syss_mask;
|
|
|
|
if (ddata->clk_disable_quirk)
|
|
ddata->clk_disable_quirk(ddata);
|
|
|
|
sysc_val = sysc_read_sysconfig(ddata);
|
|
sysc_val |= sysc_mask;
|
|
sysc_write(ddata, sysc_offset, sysc_val);
|
|
|
|
if (ddata->cfg.srst_udelay)
|
|
usleep_range(ddata->cfg.srst_udelay,
|
|
ddata->cfg.srst_udelay * 2);
|
|
|
|
if (ddata->clk_enable_quirk)
|
|
ddata->clk_enable_quirk(ddata);
|
|
|
|
/* Poll on reset status */
|
|
if (syss_offset >= 0) {
|
|
error = readx_poll_timeout(sysc_read_sysstatus, ddata, rstval,
|
|
(rstval & ddata->cfg.syss_mask) ==
|
|
syss_done,
|
|
100, MAX_MODULE_SOFTRESET_WAIT);
|
|
|
|
} else if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS) {
|
|
error = readx_poll_timeout(sysc_read_sysconfig, ddata, rstval,
|
|
!(rstval & sysc_mask),
|
|
100, MAX_MODULE_SOFTRESET_WAIT);
|
|
}
|
|
|
|
if (ddata->reset_done_quirk)
|
|
ddata->reset_done_quirk(ddata);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* At this point the module is configured enough to read the revision but
|
|
* module may not be completely configured yet to use PM runtime. Enable
|
|
* all clocks directly during init to configure the quirks needed for PM
|
|
* runtime based on the revision register.
|
|
*/
|
|
static int sysc_init_module(struct sysc *ddata)
|
|
{
|
|
int error = 0;
|
|
|
|
error = sysc_clockdomain_init(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
sysc_clkdm_deny_idle(ddata);
|
|
|
|
/*
|
|
* Always enable clocks. The bootloader may or may not have enabled
|
|
* the related clocks.
|
|
*/
|
|
error = sysc_enable_opt_clocks(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_enable_main_clocks(ddata);
|
|
if (error)
|
|
goto err_opt_clocks;
|
|
|
|
if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)) {
|
|
error = reset_control_deassert(ddata->rsts);
|
|
if (error)
|
|
goto err_main_clocks;
|
|
}
|
|
|
|
ddata->revision = sysc_read_revision(ddata);
|
|
sysc_init_revision_quirks(ddata);
|
|
sysc_init_module_quirks(ddata);
|
|
|
|
if (ddata->legacy_mode) {
|
|
error = sysc_legacy_init(ddata);
|
|
if (error)
|
|
goto err_reset;
|
|
}
|
|
|
|
if (!ddata->legacy_mode) {
|
|
error = sysc_enable_module(ddata->dev);
|
|
if (error)
|
|
goto err_reset;
|
|
}
|
|
|
|
error = sysc_reset(ddata);
|
|
if (error)
|
|
dev_err(ddata->dev, "Reset failed with %d\n", error);
|
|
|
|
if (error && !ddata->legacy_mode)
|
|
sysc_disable_module(ddata->dev);
|
|
|
|
err_reset:
|
|
if (error && !(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT))
|
|
reset_control_assert(ddata->rsts);
|
|
|
|
err_main_clocks:
|
|
if (error)
|
|
sysc_disable_main_clocks(ddata);
|
|
err_opt_clocks:
|
|
/* No re-enable of clockdomain autoidle to prevent module autoidle */
|
|
if (error) {
|
|
sysc_disable_opt_clocks(ddata);
|
|
sysc_clkdm_allow_idle(ddata);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static int sysc_init_sysc_mask(struct sysc *ddata)
|
|
{
|
|
struct device_node *np = ddata->dev->of_node;
|
|
int error;
|
|
u32 val;
|
|
|
|
error = of_property_read_u32(np, "ti,sysc-mask", &val);
|
|
if (error)
|
|
return 0;
|
|
|
|
ddata->cfg.sysc_val = val & ddata->cap->sysc_mask;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sysc_init_idlemode(struct sysc *ddata, u8 *idlemodes,
|
|
const char *name)
|
|
{
|
|
struct device_node *np = ddata->dev->of_node;
|
|
struct property *prop;
|
|
const __be32 *p;
|
|
u32 val;
|
|
|
|
of_property_for_each_u32(np, name, prop, p, val) {
|
|
if (val >= SYSC_NR_IDLEMODES) {
|
|
dev_err(ddata->dev, "invalid idlemode: %i\n", val);
|
|
return -EINVAL;
|
|
}
|
|
*idlemodes |= (1 << val);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sysc_init_idlemodes(struct sysc *ddata)
|
|
{
|
|
int error;
|
|
|
|
error = sysc_init_idlemode(ddata, &ddata->cfg.midlemodes,
|
|
"ti,sysc-midle");
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_init_idlemode(ddata, &ddata->cfg.sidlemodes,
|
|
"ti,sysc-sidle");
|
|
if (error)
|
|
return error;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Only some devices on omap4 and later have SYSCONFIG reset done
|
|
* bit. We can detect this if there is no SYSSTATUS at all, or the
|
|
* SYSTATUS bit 0 is not used. Note that some SYSSTATUS registers
|
|
* have multiple bits for the child devices like OHCI and EHCI.
|
|
* Depends on SYSC being parsed first.
|
|
*/
|
|
static int sysc_init_syss_mask(struct sysc *ddata)
|
|
{
|
|
struct device_node *np = ddata->dev->of_node;
|
|
int error;
|
|
u32 val;
|
|
|
|
error = of_property_read_u32(np, "ti,syss-mask", &val);
|
|
if (error) {
|
|
if ((ddata->cap->type == TI_SYSC_OMAP4 ||
|
|
ddata->cap->type == TI_SYSC_OMAP4_TIMER) &&
|
|
(ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
|
|
ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (!(val & 1) && (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
|
|
ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
|
|
|
|
ddata->cfg.syss_mask = val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Many child device drivers need to have fck and opt clocks available
|
|
* to get the clock rate for device internal configuration etc.
|
|
*/
|
|
static int sysc_child_add_named_clock(struct sysc *ddata,
|
|
struct device *child,
|
|
const char *name)
|
|
{
|
|
struct clk *clk;
|
|
struct clk_lookup *l;
|
|
int error = 0;
|
|
|
|
if (!name)
|
|
return 0;
|
|
|
|
clk = clk_get(child, name);
|
|
if (!IS_ERR(clk)) {
|
|
error = -EEXIST;
|
|
goto put_clk;
|
|
}
|
|
|
|
clk = clk_get(ddata->dev, name);
|
|
if (IS_ERR(clk))
|
|
return -ENODEV;
|
|
|
|
l = clkdev_create(clk, name, dev_name(child));
|
|
if (!l)
|
|
error = -ENOMEM;
|
|
put_clk:
|
|
clk_put(clk);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int sysc_child_add_clocks(struct sysc *ddata,
|
|
struct device *child)
|
|
{
|
|
int i, error;
|
|
|
|
for (i = 0; i < ddata->nr_clocks; i++) {
|
|
error = sysc_child_add_named_clock(ddata,
|
|
child,
|
|
ddata->clock_roles[i]);
|
|
if (error && error != -EEXIST) {
|
|
dev_err(ddata->dev, "could not add child clock %s: %i\n",
|
|
ddata->clock_roles[i], error);
|
|
|
|
return error;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct device_type sysc_device_type = {
|
|
};
|
|
|
|
static struct sysc *sysc_child_to_parent(struct device *dev)
|
|
{
|
|
struct device *parent = dev->parent;
|
|
|
|
if (!parent || parent->type != &sysc_device_type)
|
|
return NULL;
|
|
|
|
return dev_get_drvdata(parent);
|
|
}
|
|
|
|
static int __maybe_unused sysc_child_runtime_suspend(struct device *dev)
|
|
{
|
|
struct sysc *ddata;
|
|
int error;
|
|
|
|
ddata = sysc_child_to_parent(dev);
|
|
|
|
error = pm_generic_runtime_suspend(dev);
|
|
if (error)
|
|
return error;
|
|
|
|
if (!ddata->enabled)
|
|
return 0;
|
|
|
|
return sysc_runtime_suspend(ddata->dev);
|
|
}
|
|
|
|
static int __maybe_unused sysc_child_runtime_resume(struct device *dev)
|
|
{
|
|
struct sysc *ddata;
|
|
int error;
|
|
|
|
ddata = sysc_child_to_parent(dev);
|
|
|
|
if (!ddata->enabled) {
|
|
error = sysc_runtime_resume(ddata->dev);
|
|
if (error < 0)
|
|
dev_err(ddata->dev,
|
|
"%s error: %i\n", __func__, error);
|
|
}
|
|
|
|
return pm_generic_runtime_resume(dev);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int sysc_child_suspend_noirq(struct device *dev)
|
|
{
|
|
struct sysc *ddata;
|
|
int error;
|
|
|
|
ddata = sysc_child_to_parent(dev);
|
|
|
|
dev_dbg(ddata->dev, "%s %s\n", __func__,
|
|
ddata->name ? ddata->name : "");
|
|
|
|
error = pm_generic_suspend_noirq(dev);
|
|
if (error) {
|
|
dev_err(dev, "%s error at %i: %i\n",
|
|
__func__, __LINE__, error);
|
|
|
|
return error;
|
|
}
|
|
|
|
if (!pm_runtime_status_suspended(dev)) {
|
|
error = pm_generic_runtime_suspend(dev);
|
|
if (error) {
|
|
dev_dbg(dev, "%s busy at %i: %i\n",
|
|
__func__, __LINE__, error);
|
|
|
|
return 0;
|
|
}
|
|
|
|
error = sysc_runtime_suspend(ddata->dev);
|
|
if (error) {
|
|
dev_err(dev, "%s error at %i: %i\n",
|
|
__func__, __LINE__, error);
|
|
|
|
return error;
|
|
}
|
|
|
|
ddata->child_needs_resume = true;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sysc_child_resume_noirq(struct device *dev)
|
|
{
|
|
struct sysc *ddata;
|
|
int error;
|
|
|
|
ddata = sysc_child_to_parent(dev);
|
|
|
|
dev_dbg(ddata->dev, "%s %s\n", __func__,
|
|
ddata->name ? ddata->name : "");
|
|
|
|
if (ddata->child_needs_resume) {
|
|
ddata->child_needs_resume = false;
|
|
|
|
error = sysc_runtime_resume(ddata->dev);
|
|
if (error)
|
|
dev_err(ddata->dev,
|
|
"%s runtime resume error: %i\n",
|
|
__func__, error);
|
|
|
|
error = pm_generic_runtime_resume(dev);
|
|
if (error)
|
|
dev_err(ddata->dev,
|
|
"%s generic runtime resume: %i\n",
|
|
__func__, error);
|
|
}
|
|
|
|
return pm_generic_resume_noirq(dev);
|
|
}
|
|
#endif
|
|
|
|
static struct dev_pm_domain sysc_child_pm_domain = {
|
|
.ops = {
|
|
SET_RUNTIME_PM_OPS(sysc_child_runtime_suspend,
|
|
sysc_child_runtime_resume,
|
|
NULL)
|
|
USE_PLATFORM_PM_SLEEP_OPS
|
|
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_child_suspend_noirq,
|
|
sysc_child_resume_noirq)
|
|
}
|
|
};
|
|
|
|
/**
|
|
* sysc_legacy_idle_quirk - handle children in omap_device compatible way
|
|
* @ddata: device driver data
|
|
* @child: child device driver
|
|
*
|
|
* Allow idle for child devices as done with _od_runtime_suspend().
|
|
* Otherwise many child devices will not idle because of the permanent
|
|
* parent usecount set in pm_runtime_irq_safe().
|
|
*
|
|
* Note that the long term solution is to just modify the child device
|
|
* drivers to not set pm_runtime_irq_safe() and then this can be just
|
|
* dropped.
|
|
*/
|
|
static void sysc_legacy_idle_quirk(struct sysc *ddata, struct device *child)
|
|
{
|
|
if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
|
|
dev_pm_domain_set(child, &sysc_child_pm_domain);
|
|
}
|
|
|
|
static int sysc_notifier_call(struct notifier_block *nb,
|
|
unsigned long event, void *device)
|
|
{
|
|
struct device *dev = device;
|
|
struct sysc *ddata;
|
|
int error;
|
|
|
|
ddata = sysc_child_to_parent(dev);
|
|
if (!ddata)
|
|
return NOTIFY_DONE;
|
|
|
|
switch (event) {
|
|
case BUS_NOTIFY_ADD_DEVICE:
|
|
error = sysc_child_add_clocks(ddata, dev);
|
|
if (error)
|
|
return error;
|
|
sysc_legacy_idle_quirk(ddata, dev);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block sysc_nb = {
|
|
.notifier_call = sysc_notifier_call,
|
|
};
|
|
|
|
/* Device tree configured quirks */
|
|
struct sysc_dts_quirk {
|
|
const char *name;
|
|
u32 mask;
|
|
};
|
|
|
|
static const struct sysc_dts_quirk sysc_dts_quirks[] = {
|
|
{ .name = "ti,no-idle-on-init",
|
|
.mask = SYSC_QUIRK_NO_IDLE_ON_INIT, },
|
|
{ .name = "ti,no-reset-on-init",
|
|
.mask = SYSC_QUIRK_NO_RESET_ON_INIT, },
|
|
{ .name = "ti,no-idle",
|
|
.mask = SYSC_QUIRK_NO_IDLE, },
|
|
};
|
|
|
|
static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
|
|
bool is_child)
|
|
{
|
|
const struct property *prop;
|
|
int i, len;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sysc_dts_quirks); i++) {
|
|
const char *name = sysc_dts_quirks[i].name;
|
|
|
|
prop = of_get_property(np, name, &len);
|
|
if (!prop)
|
|
continue;
|
|
|
|
ddata->cfg.quirks |= sysc_dts_quirks[i].mask;
|
|
if (is_child) {
|
|
dev_warn(ddata->dev,
|
|
"dts flag should be at module level for %s\n",
|
|
name);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int sysc_init_dts_quirks(struct sysc *ddata)
|
|
{
|
|
struct device_node *np = ddata->dev->of_node;
|
|
int error;
|
|
u32 val;
|
|
|
|
ddata->legacy_mode = of_get_property(np, "ti,hwmods", NULL);
|
|
|
|
sysc_parse_dts_quirks(ddata, np, false);
|
|
error = of_property_read_u32(np, "ti,sysc-delay-us", &val);
|
|
if (!error) {
|
|
if (val > 255) {
|
|
dev_warn(ddata->dev, "bad ti,sysc-delay-us: %i\n",
|
|
val);
|
|
}
|
|
|
|
ddata->cfg.srst_udelay = (u8)val;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sysc_unprepare(struct sysc *ddata)
|
|
{
|
|
int i;
|
|
|
|
if (!ddata->clocks)
|
|
return;
|
|
|
|
for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
|
|
if (!IS_ERR_OR_NULL(ddata->clocks[i]))
|
|
clk_unprepare(ddata->clocks[i]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Common sysc register bits found on omap2, also known as type1
|
|
*/
|
|
static const struct sysc_regbits sysc_regbits_omap2 = {
|
|
.dmadisable_shift = -ENODEV,
|
|
.midle_shift = 12,
|
|
.sidle_shift = 3,
|
|
.clkact_shift = 8,
|
|
.emufree_shift = 5,
|
|
.enwkup_shift = 2,
|
|
.srst_shift = 1,
|
|
.autoidle_shift = 0,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_omap2 = {
|
|
.type = TI_SYSC_OMAP2,
|
|
.sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
|
|
SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
|
|
SYSC_OMAP2_AUTOIDLE,
|
|
.regbits = &sysc_regbits_omap2,
|
|
};
|
|
|
|
/* All omap2 and 3 timers, and timers 1, 2 & 10 on omap 4 and 5 */
|
|
static const struct sysc_capabilities sysc_omap2_timer = {
|
|
.type = TI_SYSC_OMAP2_TIMER,
|
|
.sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
|
|
SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
|
|
SYSC_OMAP2_AUTOIDLE,
|
|
.regbits = &sysc_regbits_omap2,
|
|
.mod_quirks = SYSC_QUIRK_USE_CLOCKACT,
|
|
};
|
|
|
|
/*
|
|
* SHAM2 (SHA1/MD5) sysc found on omap3, a variant of sysc_regbits_omap2
|
|
* with different sidle position
|
|
*/
|
|
static const struct sysc_regbits sysc_regbits_omap3_sham = {
|
|
.dmadisable_shift = -ENODEV,
|
|
.midle_shift = -ENODEV,
|
|
.sidle_shift = 4,
|
|
.clkact_shift = -ENODEV,
|
|
.enwkup_shift = -ENODEV,
|
|
.srst_shift = 1,
|
|
.autoidle_shift = 0,
|
|
.emufree_shift = -ENODEV,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_omap3_sham = {
|
|
.type = TI_SYSC_OMAP3_SHAM,
|
|
.sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
|
|
.regbits = &sysc_regbits_omap3_sham,
|
|
};
|
|
|
|
/*
|
|
* AES register bits found on omap3 and later, a variant of
|
|
* sysc_regbits_omap2 with different sidle position
|
|
*/
|
|
static const struct sysc_regbits sysc_regbits_omap3_aes = {
|
|
.dmadisable_shift = -ENODEV,
|
|
.midle_shift = -ENODEV,
|
|
.sidle_shift = 6,
|
|
.clkact_shift = -ENODEV,
|
|
.enwkup_shift = -ENODEV,
|
|
.srst_shift = 1,
|
|
.autoidle_shift = 0,
|
|
.emufree_shift = -ENODEV,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_omap3_aes = {
|
|
.type = TI_SYSC_OMAP3_AES,
|
|
.sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
|
|
.regbits = &sysc_regbits_omap3_aes,
|
|
};
|
|
|
|
/*
|
|
* Common sysc register bits found on omap4, also known as type2
|
|
*/
|
|
static const struct sysc_regbits sysc_regbits_omap4 = {
|
|
.dmadisable_shift = 16,
|
|
.midle_shift = 4,
|
|
.sidle_shift = 2,
|
|
.clkact_shift = -ENODEV,
|
|
.enwkup_shift = -ENODEV,
|
|
.emufree_shift = 1,
|
|
.srst_shift = 0,
|
|
.autoidle_shift = -ENODEV,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_omap4 = {
|
|
.type = TI_SYSC_OMAP4,
|
|
.sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
|
|
SYSC_OMAP4_SOFTRESET,
|
|
.regbits = &sysc_regbits_omap4,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_omap4_timer = {
|
|
.type = TI_SYSC_OMAP4_TIMER,
|
|
.sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
|
|
SYSC_OMAP4_SOFTRESET,
|
|
.regbits = &sysc_regbits_omap4,
|
|
};
|
|
|
|
/*
|
|
* Common sysc register bits found on omap4, also known as type3
|
|
*/
|
|
static const struct sysc_regbits sysc_regbits_omap4_simple = {
|
|
.dmadisable_shift = -ENODEV,
|
|
.midle_shift = 2,
|
|
.sidle_shift = 0,
|
|
.clkact_shift = -ENODEV,
|
|
.enwkup_shift = -ENODEV,
|
|
.srst_shift = -ENODEV,
|
|
.emufree_shift = -ENODEV,
|
|
.autoidle_shift = -ENODEV,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_omap4_simple = {
|
|
.type = TI_SYSC_OMAP4_SIMPLE,
|
|
.regbits = &sysc_regbits_omap4_simple,
|
|
};
|
|
|
|
/*
|
|
* SmartReflex sysc found on omap34xx
|
|
*/
|
|
static const struct sysc_regbits sysc_regbits_omap34xx_sr = {
|
|
.dmadisable_shift = -ENODEV,
|
|
.midle_shift = -ENODEV,
|
|
.sidle_shift = -ENODEV,
|
|
.clkact_shift = 20,
|
|
.enwkup_shift = -ENODEV,
|
|
.srst_shift = -ENODEV,
|
|
.emufree_shift = -ENODEV,
|
|
.autoidle_shift = -ENODEV,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_34xx_sr = {
|
|
.type = TI_SYSC_OMAP34XX_SR,
|
|
.sysc_mask = SYSC_OMAP2_CLOCKACTIVITY,
|
|
.regbits = &sysc_regbits_omap34xx_sr,
|
|
.mod_quirks = SYSC_QUIRK_USE_CLOCKACT | SYSC_QUIRK_UNCACHED |
|
|
SYSC_QUIRK_LEGACY_IDLE,
|
|
};
|
|
|
|
/*
|
|
* SmartReflex sysc found on omap36xx and later
|
|
*/
|
|
static const struct sysc_regbits sysc_regbits_omap36xx_sr = {
|
|
.dmadisable_shift = -ENODEV,
|
|
.midle_shift = -ENODEV,
|
|
.sidle_shift = 24,
|
|
.clkact_shift = -ENODEV,
|
|
.enwkup_shift = 26,
|
|
.srst_shift = -ENODEV,
|
|
.emufree_shift = -ENODEV,
|
|
.autoidle_shift = -ENODEV,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_36xx_sr = {
|
|
.type = TI_SYSC_OMAP36XX_SR,
|
|
.sysc_mask = SYSC_OMAP3_SR_ENAWAKEUP,
|
|
.regbits = &sysc_regbits_omap36xx_sr,
|
|
.mod_quirks = SYSC_QUIRK_UNCACHED | SYSC_QUIRK_LEGACY_IDLE,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_omap4_sr = {
|
|
.type = TI_SYSC_OMAP4_SR,
|
|
.regbits = &sysc_regbits_omap36xx_sr,
|
|
.mod_quirks = SYSC_QUIRK_LEGACY_IDLE,
|
|
};
|
|
|
|
/*
|
|
* McASP register bits found on omap4 and later
|
|
*/
|
|
static const struct sysc_regbits sysc_regbits_omap4_mcasp = {
|
|
.dmadisable_shift = -ENODEV,
|
|
.midle_shift = -ENODEV,
|
|
.sidle_shift = 0,
|
|
.clkact_shift = -ENODEV,
|
|
.enwkup_shift = -ENODEV,
|
|
.srst_shift = -ENODEV,
|
|
.emufree_shift = -ENODEV,
|
|
.autoidle_shift = -ENODEV,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_omap4_mcasp = {
|
|
.type = TI_SYSC_OMAP4_MCASP,
|
|
.regbits = &sysc_regbits_omap4_mcasp,
|
|
.mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED,
|
|
};
|
|
|
|
/*
|
|
* McASP found on dra7 and later
|
|
*/
|
|
static const struct sysc_capabilities sysc_dra7_mcasp = {
|
|
.type = TI_SYSC_OMAP4_SIMPLE,
|
|
.regbits = &sysc_regbits_omap4_simple,
|
|
.mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED,
|
|
};
|
|
|
|
/*
|
|
* FS USB host found on omap4 and later
|
|
*/
|
|
static const struct sysc_regbits sysc_regbits_omap4_usb_host_fs = {
|
|
.dmadisable_shift = -ENODEV,
|
|
.midle_shift = -ENODEV,
|
|
.sidle_shift = 24,
|
|
.clkact_shift = -ENODEV,
|
|
.enwkup_shift = 26,
|
|
.srst_shift = -ENODEV,
|
|
.emufree_shift = -ENODEV,
|
|
.autoidle_shift = -ENODEV,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_omap4_usb_host_fs = {
|
|
.type = TI_SYSC_OMAP4_USB_HOST_FS,
|
|
.sysc_mask = SYSC_OMAP2_ENAWAKEUP,
|
|
.regbits = &sysc_regbits_omap4_usb_host_fs,
|
|
};
|
|
|
|
static const struct sysc_regbits sysc_regbits_dra7_mcan = {
|
|
.dmadisable_shift = -ENODEV,
|
|
.midle_shift = -ENODEV,
|
|
.sidle_shift = -ENODEV,
|
|
.clkact_shift = -ENODEV,
|
|
.enwkup_shift = 4,
|
|
.srst_shift = 0,
|
|
.emufree_shift = -ENODEV,
|
|
.autoidle_shift = -ENODEV,
|
|
};
|
|
|
|
static const struct sysc_capabilities sysc_dra7_mcan = {
|
|
.type = TI_SYSC_DRA7_MCAN,
|
|
.sysc_mask = SYSC_DRA7_MCAN_ENAWAKEUP | SYSC_OMAP4_SOFTRESET,
|
|
.regbits = &sysc_regbits_dra7_mcan,
|
|
.mod_quirks = SYSS_QUIRK_RESETDONE_INVERTED,
|
|
};
|
|
|
|
static int sysc_init_pdata(struct sysc *ddata)
|
|
{
|
|
struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
|
|
struct ti_sysc_module_data *mdata;
|
|
|
|
if (!pdata)
|
|
return 0;
|
|
|
|
mdata = devm_kzalloc(ddata->dev, sizeof(*mdata), GFP_KERNEL);
|
|
if (!mdata)
|
|
return -ENOMEM;
|
|
|
|
if (ddata->legacy_mode) {
|
|
mdata->name = ddata->legacy_mode;
|
|
mdata->module_pa = ddata->module_pa;
|
|
mdata->module_size = ddata->module_size;
|
|
mdata->offsets = ddata->offsets;
|
|
mdata->nr_offsets = SYSC_MAX_REGS;
|
|
mdata->cap = ddata->cap;
|
|
mdata->cfg = &ddata->cfg;
|
|
}
|
|
|
|
ddata->mdata = mdata;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sysc_init_match(struct sysc *ddata)
|
|
{
|
|
const struct sysc_capabilities *cap;
|
|
|
|
cap = of_device_get_match_data(ddata->dev);
|
|
if (!cap)
|
|
return -EINVAL;
|
|
|
|
ddata->cap = cap;
|
|
if (ddata->cap)
|
|
ddata->cfg.quirks |= ddata->cap->mod_quirks;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ti_sysc_idle(struct work_struct *work)
|
|
{
|
|
struct sysc *ddata;
|
|
|
|
ddata = container_of(work, struct sysc, idle_work.work);
|
|
|
|
/*
|
|
* One time decrement of clock usage counts if left on from init.
|
|
* Note that we disable opt clocks unconditionally in this case
|
|
* as they are enabled unconditionally during init without
|
|
* considering sysc_opt_clks_needed() at that point.
|
|
*/
|
|
if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE |
|
|
SYSC_QUIRK_NO_IDLE_ON_INIT)) {
|
|
sysc_disable_main_clocks(ddata);
|
|
sysc_disable_opt_clocks(ddata);
|
|
sysc_clkdm_allow_idle(ddata);
|
|
}
|
|
|
|
/* Keep permanent PM runtime usage count for SYSC_QUIRK_NO_IDLE */
|
|
if (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE)
|
|
return;
|
|
|
|
/*
|
|
* Decrement PM runtime usage count for SYSC_QUIRK_NO_IDLE_ON_INIT
|
|
* and SYSC_QUIRK_NO_RESET_ON_INIT
|
|
*/
|
|
if (pm_runtime_active(ddata->dev))
|
|
pm_runtime_put_sync(ddata->dev);
|
|
}
|
|
|
|
static const struct of_device_id sysc_match_table[] = {
|
|
{ .compatible = "simple-bus", },
|
|
{ /* sentinel */ },
|
|
};
|
|
|
|
static int sysc_probe(struct platform_device *pdev)
|
|
{
|
|
struct ti_sysc_platform_data *pdata = dev_get_platdata(&pdev->dev);
|
|
struct sysc *ddata;
|
|
int error;
|
|
|
|
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
|
|
if (!ddata)
|
|
return -ENOMEM;
|
|
|
|
ddata->dev = &pdev->dev;
|
|
platform_set_drvdata(pdev, ddata);
|
|
|
|
error = sysc_init_match(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_init_dts_quirks(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_map_and_check_registers(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_init_sysc_mask(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_init_idlemodes(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_init_syss_mask(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_init_pdata(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
sysc_init_early_quirks(ddata);
|
|
|
|
error = sysc_get_clocks(ddata);
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysc_init_resets(ddata);
|
|
if (error)
|
|
goto unprepare;
|
|
|
|
error = sysc_init_module(ddata);
|
|
if (error)
|
|
goto unprepare;
|
|
|
|
pm_runtime_enable(ddata->dev);
|
|
error = pm_runtime_get_sync(ddata->dev);
|
|
if (error < 0) {
|
|
pm_runtime_put_noidle(ddata->dev);
|
|
pm_runtime_disable(ddata->dev);
|
|
goto unprepare;
|
|
}
|
|
|
|
/* Balance use counts as PM runtime should have enabled these all */
|
|
if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT))
|
|
reset_control_assert(ddata->rsts);
|
|
|
|
if (!(ddata->cfg.quirks &
|
|
(SYSC_QUIRK_NO_IDLE | SYSC_QUIRK_NO_IDLE_ON_INIT))) {
|
|
sysc_disable_main_clocks(ddata);
|
|
sysc_disable_opt_clocks(ddata);
|
|
sysc_clkdm_allow_idle(ddata);
|
|
}
|
|
|
|
sysc_show_registers(ddata);
|
|
|
|
ddata->dev->type = &sysc_device_type;
|
|
error = of_platform_populate(ddata->dev->of_node, sysc_match_table,
|
|
pdata ? pdata->auxdata : NULL,
|
|
ddata->dev);
|
|
if (error)
|
|
goto err;
|
|
|
|
INIT_DELAYED_WORK(&ddata->idle_work, ti_sysc_idle);
|
|
|
|
/* At least earlycon won't survive without deferred idle */
|
|
if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE |
|
|
SYSC_QUIRK_NO_IDLE_ON_INIT |
|
|
SYSC_QUIRK_NO_RESET_ON_INIT)) {
|
|
schedule_delayed_work(&ddata->idle_work, 3000);
|
|
} else {
|
|
pm_runtime_put(&pdev->dev);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
unprepare:
|
|
sysc_unprepare(ddata);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int sysc_remove(struct platform_device *pdev)
|
|
{
|
|
struct sysc *ddata = platform_get_drvdata(pdev);
|
|
int error;
|
|
|
|
cancel_delayed_work_sync(&ddata->idle_work);
|
|
|
|
error = pm_runtime_get_sync(ddata->dev);
|
|
if (error < 0) {
|
|
pm_runtime_put_noidle(ddata->dev);
|
|
pm_runtime_disable(ddata->dev);
|
|
goto unprepare;
|
|
}
|
|
|
|
of_platform_depopulate(&pdev->dev);
|
|
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
reset_control_assert(ddata->rsts);
|
|
|
|
unprepare:
|
|
sysc_unprepare(ddata);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id sysc_match[] = {
|
|
{ .compatible = "ti,sysc-omap2", .data = &sysc_omap2, },
|
|
{ .compatible = "ti,sysc-omap2-timer", .data = &sysc_omap2_timer, },
|
|
{ .compatible = "ti,sysc-omap4", .data = &sysc_omap4, },
|
|
{ .compatible = "ti,sysc-omap4-timer", .data = &sysc_omap4_timer, },
|
|
{ .compatible = "ti,sysc-omap4-simple", .data = &sysc_omap4_simple, },
|
|
{ .compatible = "ti,sysc-omap3430-sr", .data = &sysc_34xx_sr, },
|
|
{ .compatible = "ti,sysc-omap3630-sr", .data = &sysc_36xx_sr, },
|
|
{ .compatible = "ti,sysc-omap4-sr", .data = &sysc_omap4_sr, },
|
|
{ .compatible = "ti,sysc-omap3-sham", .data = &sysc_omap3_sham, },
|
|
{ .compatible = "ti,sysc-omap-aes", .data = &sysc_omap3_aes, },
|
|
{ .compatible = "ti,sysc-mcasp", .data = &sysc_omap4_mcasp, },
|
|
{ .compatible = "ti,sysc-dra7-mcasp", .data = &sysc_dra7_mcasp, },
|
|
{ .compatible = "ti,sysc-usb-host-fs",
|
|
.data = &sysc_omap4_usb_host_fs, },
|
|
{ .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sysc_match);
|
|
|
|
static struct platform_driver sysc_driver = {
|
|
.probe = sysc_probe,
|
|
.remove = sysc_remove,
|
|
.driver = {
|
|
.name = "ti-sysc",
|
|
.of_match_table = sysc_match,
|
|
.pm = &sysc_pm_ops,
|
|
},
|
|
};
|
|
|
|
static int __init sysc_init(void)
|
|
{
|
|
bus_register_notifier(&platform_bus_type, &sysc_nb);
|
|
|
|
return platform_driver_register(&sysc_driver);
|
|
}
|
|
module_init(sysc_init);
|
|
|
|
static void __exit sysc_exit(void)
|
|
{
|
|
bus_unregister_notifier(&platform_bus_type, &sysc_nb);
|
|
platform_driver_unregister(&sysc_driver);
|
|
}
|
|
module_exit(sysc_exit);
|
|
|
|
MODULE_DESCRIPTION("TI sysc interconnect target driver");
|
|
MODULE_LICENSE("GPL v2");
|