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linux/drivers/clk/pxa/clk-pxa.c
Stephen Boyd 62e59c4e69 clk: Remove io.h from clk-provider.h 
Now that we've gotten rid of clk_readl() we can remove io.h from the
clk-provider header and push out the io.h include to any code that isn't
already including the io.h header but using things like readl/writel,
etc.

Found with this grep:

  git grep -l clk-provider.h | grep '.c$' | xargs git grep -L 'linux/io.h' | \
  	xargs git grep -l \
	-e '\<__iowrite32_copy\>' --or \
	-e '\<__ioread32_copy\>' --or \
	-e '\<__iowrite64_copy\>' --or \
	-e '\<ioremap_page_range\>' --or \
	-e '\<ioremap_huge_init\>' --or \
	-e '\<arch_ioremap_pud_supported\>' --or \
	-e '\<arch_ioremap_pmd_supported\>' --or \
	-e '\<devm_ioport_map\>' --or \
	-e '\<devm_ioport_unmap\>' --or \
	-e '\<IOMEM_ERR_PTR\>' --or \
	-e '\<devm_ioremap\>' --or \
	-e '\<devm_ioremap_nocache\>' --or \
	-e '\<devm_ioremap_wc\>' --or \
	-e '\<devm_iounmap\>' --or \
	-e '\<devm_ioremap_release\>' --or \
	-e '\<devm_memremap\>' --or \
	-e '\<devm_memunmap\>' --or \
	-e '\<__devm_memremap_pages\>' --or \
	-e '\<pci_remap_cfgspace\>' --or \
	-e '\<arch_has_dev_port\>' --or \
	-e '\<arch_phys_wc_add\>' --or \
	-e '\<arch_phys_wc_del\>' --or \
	-e '\<memremap\>' --or \
	-e '\<memunmap\>' --or \
	-e '\<arch_io_reserve_memtype_wc\>' --or \
	-e '\<arch_io_free_memtype_wc\>' --or \
	-e '\<__io_aw\>' --or \
	-e '\<__io_pbw\>' --or \
	-e '\<__io_paw\>' --or \
	-e '\<__io_pbr\>' --or \
	-e '\<__io_par\>' --or \
	-e '\<__raw_readb\>' --or \
	-e '\<__raw_readw\>' --or \
	-e '\<__raw_readl\>' --or \
	-e '\<__raw_readq\>' --or \
	-e '\<__raw_writeb\>' --or \
	-e '\<__raw_writew\>' --or \
	-e '\<__raw_writel\>' --or \
	-e '\<__raw_writeq\>' --or \
	-e '\<readb\>' --or \
	-e '\<readw\>' --or \
	-e '\<readl\>' --or \
	-e '\<readq\>' --or \
	-e '\<writeb\>' --or \
	-e '\<writew\>' --or \
	-e '\<writel\>' --or \
	-e '\<writeq\>' --or \
	-e '\<readb_relaxed\>' --or \
	-e '\<readw_relaxed\>' --or \
	-e '\<readl_relaxed\>' --or \
	-e '\<readq_relaxed\>' --or \
	-e '\<writeb_relaxed\>' --or \
	-e '\<writew_relaxed\>' --or \
	-e '\<writel_relaxed\>' --or \
	-e '\<writeq_relaxed\>' --or \
	-e '\<readsb\>' --or \
	-e '\<readsw\>' --or \
	-e '\<readsl\>' --or \
	-e '\<readsq\>' --or \
	-e '\<writesb\>' --or \
	-e '\<writesw\>' --or \
	-e '\<writesl\>' --or \
	-e '\<writesq\>' --or \
	-e '\<inb\>' --or \
	-e '\<inw\>' --or \
	-e '\<inl\>' --or \
	-e '\<outb\>' --or \
	-e '\<outw\>' --or \
	-e '\<outl\>' --or \
	-e '\<inb_p\>' --or \
	-e '\<inw_p\>' --or \
	-e '\<inl_p\>' --or \
	-e '\<outb_p\>' --or \
	-e '\<outw_p\>' --or \
	-e '\<outl_p\>' --or \
	-e '\<insb\>' --or \
	-e '\<insw\>' --or \
	-e '\<insl\>' --or \
	-e '\<outsb\>' --or \
	-e '\<outsw\>' --or \
	-e '\<outsl\>' --or \
	-e '\<insb_p\>' --or \
	-e '\<insw_p\>' --or \
	-e '\<insl_p\>' --or \
	-e '\<outsb_p\>' --or \
	-e '\<outsw_p\>' --or \
	-e '\<outsl_p\>' --or \
	-e '\<ioread8\>' --or \
	-e '\<ioread16\>' --or \
	-e '\<ioread32\>' --or \
	-e '\<ioread64\>' --or \
	-e '\<iowrite8\>' --or \
	-e '\<iowrite16\>' --or \
	-e '\<iowrite32\>' --or \
	-e '\<iowrite64\>' --or \
	-e '\<ioread16be\>' --or \
	-e '\<ioread32be\>' --or \
	-e '\<ioread64be\>' --or \
	-e '\<iowrite16be\>' --or \
	-e '\<iowrite32be\>' --or \
	-e '\<iowrite64be\>' --or \
	-e '\<ioread8_rep\>' --or \
	-e '\<ioread16_rep\>' --or \
	-e '\<ioread32_rep\>' --or \
	-e '\<ioread64_rep\>' --or \
	-e '\<iowrite8_rep\>' --or \
	-e '\<iowrite16_rep\>' --or \
	-e '\<iowrite32_rep\>' --or \
	-e '\<iowrite64_rep\>' --or \
	-e '\<__io_virt\>' --or \
	-e '\<pci_iounmap\>' --or \
	-e '\<virt_to_phys\>' --or \
	-e '\<phys_to_virt\>' --or \
	-e '\<ioremap_uc\>' --or \
	-e '\<ioremap\>' --or \
	-e '\<__ioremap\>' --or \
	-e '\<iounmap\>' --or \
	-e '\<ioremap\>' --or \
	-e '\<ioremap_nocache\>' --or \
	-e '\<ioremap_uc\>' --or \
	-e '\<ioremap_wc\>' --or \
	-e '\<ioremap_wc\>' --or \
	-e '\<ioremap_wt\>' --or \
	-e '\<ioport_map\>' --or \
	-e '\<ioport_unmap\>' --or \
	-e '\<ioport_map\>' --or \
	-e '\<ioport_unmap\>' --or \
	-e '\<xlate_dev_kmem_ptr\>' --or \
	-e '\<xlate_dev_mem_ptr\>' --or \
	-e '\<unxlate_dev_mem_ptr\>' --or \
	-e '\<virt_to_bus\>' --or \
	-e '\<bus_to_virt\>' --or \
	-e '\<memset_io\>' --or \
	-e '\<memcpy_fromio\>' --or \
	-e '\<memcpy_toio\>'

I also reordered a couple includes when they weren't alphabetical and
removed clk.h from kona, replacing it with clk-provider.h because
that driver doesn't use clk consumer APIs.

Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Cc: Chris Zankel <chris@zankel.net>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: John Crispin <john@phrozen.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-05-15 13:21:37 -07:00

249 lines
6.6 KiB
C
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/*
* Marvell PXA family clocks
*
* Copyright (C) 2014 Robert Jarzmik
*
* Common clock code for PXA clocks ("CKEN" type clocks + DT)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/io.h>
#include <linux/of.h>
#include <dt-bindings/clock/pxa-clock.h>
#include "clk-pxa.h"
#define KHz 1000
#define MHz (1000 * 1000)
#define MDREFR_K0DB4 (1 << 29) /* SDCLK0 Divide by 4 Control/Status */
#define MDREFR_K2FREE (1 << 25) /* SDRAM Free-Running Control */
#define MDREFR_K1FREE (1 << 24) /* SDRAM Free-Running Control */
#define MDREFR_K0FREE (1 << 23) /* SDRAM Free-Running Control */
#define MDREFR_SLFRSH (1 << 22) /* SDRAM Self-Refresh Control/Status */
#define MDREFR_APD (1 << 20) /* SDRAM/SSRAM Auto-Power-Down Enable */
#define MDREFR_K2DB2 (1 << 19) /* SDCLK2 Divide by 2 Control/Status */
#define MDREFR_K2RUN (1 << 18) /* SDCLK2 Run Control/Status */
#define MDREFR_K1DB2 (1 << 17) /* SDCLK1 Divide by 2 Control/Status */
#define MDREFR_K1RUN (1 << 16) /* SDCLK1 Run Control/Status */
#define MDREFR_E1PIN (1 << 15) /* SDCKE1 Level Control/Status */
#define MDREFR_K0DB2 (1 << 14) /* SDCLK0 Divide by 2 Control/Status */
#define MDREFR_K0RUN (1 << 13) /* SDCLK0 Run Control/Status */
#define MDREFR_E0PIN (1 << 12) /* SDCKE0 Level Control/Status */
#define MDREFR_DB2_MASK (MDREFR_K2DB2 | MDREFR_K1DB2)
#define MDREFR_DRI_MASK 0xFFF
static DEFINE_SPINLOCK(pxa_clk_lock);
static struct clk *pxa_clocks[CLK_MAX];
static struct clk_onecell_data onecell_data = {
.clks = pxa_clocks,
.clk_num = CLK_MAX,
};
struct pxa_clk {
struct clk_hw hw;
struct clk_fixed_factor lp;
struct clk_fixed_factor hp;
struct clk_gate gate;
bool (*is_in_low_power)(void);
};
#define to_pxa_clk(_hw) container_of(_hw, struct pxa_clk, hw)
static unsigned long cken_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct pxa_clk *pclk = to_pxa_clk(hw);
struct clk_fixed_factor *fix;
if (!pclk->is_in_low_power || pclk->is_in_low_power())
fix = &pclk->lp;
else
fix = &pclk->hp;
__clk_hw_set_clk(&fix->hw, hw);
return clk_fixed_factor_ops.recalc_rate(&fix->hw, parent_rate);
}
static const struct clk_ops cken_rate_ops = {
.recalc_rate = cken_recalc_rate,
};
static u8 cken_get_parent(struct clk_hw *hw)
{
struct pxa_clk *pclk = to_pxa_clk(hw);
if (!pclk->is_in_low_power)
return 0;
return pclk->is_in_low_power() ? 0 : 1;
}
static const struct clk_ops cken_mux_ops = {
.get_parent = cken_get_parent,
.set_parent = dummy_clk_set_parent,
};
void __init clkdev_pxa_register(int ckid, const char *con_id,
const char *dev_id, struct clk *clk)
{
if (!IS_ERR(clk) && (ckid != CLK_NONE))
pxa_clocks[ckid] = clk;
if (!IS_ERR(clk))
clk_register_clkdev(clk, con_id, dev_id);
}
int __init clk_pxa_cken_init(const struct desc_clk_cken *clks, int nb_clks)
{
int i;
struct pxa_clk *pxa_clk;
struct clk *clk;
for (i = 0; i < nb_clks; i++) {
pxa_clk = kzalloc(sizeof(*pxa_clk), GFP_KERNEL);
pxa_clk->is_in_low_power = clks[i].is_in_low_power;
pxa_clk->lp = clks[i].lp;
pxa_clk->hp = clks[i].hp;
pxa_clk->gate = clks[i].gate;
pxa_clk->gate.lock = &pxa_clk_lock;
clk = clk_register_composite(NULL, clks[i].name,
clks[i].parent_names, 2,
&pxa_clk->hw, &cken_mux_ops,
&pxa_clk->hw, &cken_rate_ops,
&pxa_clk->gate.hw, &clk_gate_ops,
clks[i].flags);
clkdev_pxa_register(clks[i].ckid, clks[i].con_id,
clks[i].dev_id, clk);
}
return 0;
}
void __init clk_pxa_dt_common_init(struct device_node *np)
{
of_clk_add_provider(np, of_clk_src_onecell_get, &onecell_data);
}
void pxa2xx_core_turbo_switch(bool on)
{
unsigned long flags;
unsigned int unused, clkcfg;
local_irq_save(flags);
asm("mrc p14, 0, %0, c6, c0, 0" : "=r" (clkcfg));
clkcfg &= ~CLKCFG_TURBO & ~CLKCFG_HALFTURBO;
if (on)
clkcfg |= CLKCFG_TURBO;
clkcfg |= CLKCFG_FCS;
asm volatile(
" b 2f\n"
" .align 5\n"
"1: mcr p14, 0, %1, c6, c0, 0\n"
" b 3f\n"
"2: b 1b\n"
"3: nop\n"
: "=&r" (unused) : "r" (clkcfg));
local_irq_restore(flags);
}
void pxa2xx_cpll_change(struct pxa2xx_freq *freq,
u32 (*mdrefr_dri)(unsigned int), void __iomem *mdrefr,
void __iomem *cccr)
{
unsigned int clkcfg = freq->clkcfg;
unsigned int unused, preset_mdrefr, postset_mdrefr;
unsigned long flags;
local_irq_save(flags);
/* Calculate the next MDREFR. If we're slowing down the SDRAM clock
* we need to preset the smaller DRI before the change. If we're
* speeding up we need to set the larger DRI value after the change.
*/
preset_mdrefr = postset_mdrefr = readl(mdrefr);
if ((preset_mdrefr & MDREFR_DRI_MASK) > mdrefr_dri(freq->membus_khz)) {
preset_mdrefr = (preset_mdrefr & ~MDREFR_DRI_MASK);
preset_mdrefr |= mdrefr_dri(freq->membus_khz);
}
postset_mdrefr =
(postset_mdrefr & ~MDREFR_DRI_MASK) |
mdrefr_dri(freq->membus_khz);
/* If we're dividing the memory clock by two for the SDRAM clock, this
* must be set prior to the change. Clearing the divide must be done
* after the change.
*/
if (freq->div2) {
preset_mdrefr |= MDREFR_DB2_MASK;
postset_mdrefr |= MDREFR_DB2_MASK;
} else {
postset_mdrefr &= ~MDREFR_DB2_MASK;
}
/* Set new the CCCR and prepare CLKCFG */
writel(freq->cccr, cccr);
asm volatile(
" ldr r4, [%1]\n"
" b 2f\n"
" .align 5\n"
"1: str %3, [%1] /* preset the MDREFR */\n"
" mcr p14, 0, %2, c6, c0, 0 /* set CLKCFG[FCS] */\n"
" str %4, [%1] /* postset the MDREFR */\n"
" b 3f\n"
"2: b 1b\n"
"3: nop\n"
: "=&r" (unused)
: "r" (mdrefr), "r" (clkcfg), "r" (preset_mdrefr),
"r" (postset_mdrefr)
: "r4", "r5");
local_irq_restore(flags);
}
int pxa2xx_determine_rate(struct clk_rate_request *req,
struct pxa2xx_freq *freqs, int nb_freqs)
{
int i, closest_below = -1, closest_above = -1;
unsigned long rate;
for (i = 0; i < nb_freqs; i++) {
rate = freqs[i].cpll;
if (rate == req->rate)
break;
if (rate < req->min_rate)
continue;
if (rate > req->max_rate)
continue;
if (rate <= req->rate)
closest_below = i;
if ((rate >= req->rate) && (closest_above == -1))
closest_above = i;
}
req->best_parent_hw = NULL;
if (i < nb_freqs) {
rate = req->rate;
} else if (closest_below >= 0) {
rate = freqs[closest_below].cpll;
} else if (closest_above >= 0) {
rate = freqs[closest_above].cpll;
} else {
pr_debug("%s(rate=%lu) no match\n", __func__, req->rate);
return -EINVAL;
}
pr_debug("%s(rate=%lu) rate=%lu\n", __func__, req->rate, rate);
req->rate = rate;
return 0;
}
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