forked from Minki/linux
b44a3d2a85
As we've enabled multiplatform kernels on ARM, and greatly done away with
the contents under arch/arm/mach-*, there's still need for SoC-related
drivers to go somewhere.
Many of them go in through other driver trees, but we still have
drivers/soc to hold some of the "doesn't fit anywhere" lowlevel code
that might be shared between ARM and ARM64 (or just in general makes
sense to not have under the architecture directory).
This branch contains mostly such code:
- Drivers for qualcomm SoCs for SMEM, SMD and SMD-RPM, used to communicate
with power management blocks on these SoCs for use by clock, regulator and
bus frequency drivers.
- Allwinner Reduced Serial Bus driver, again used to communicate with PMICs.
- Drivers for ARM's SCPI (System Control Processor). Not to be confused with
PSCI (Power State Coordination Interface). SCPI is used to communicate with
the assistant embedded cores doing power management, and we have yet to see
how many of them will implement this for their hardware vs abstracting in
other ways (or not at all like in the past).
- To make confusion between SCPI and PSCI more likely, this release also
includes an update of PSCI to interface version 1.0.
- Rockchip support for power domains.
- A driver to talk to the firmware on Raspberry Pi.
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Olof Johansson:
"As we've enabled multiplatform kernels on ARM, and greatly done away
with the contents under arch/arm/mach-*, there's still need for
SoC-related drivers to go somewhere.
Many of them go in through other driver trees, but we still have
drivers/soc to hold some of the "doesn't fit anywhere" lowlevel code
that might be shared between ARM and ARM64 (or just in general makes
sense to not have under the architecture directory).
This branch contains mostly such code:
- Drivers for qualcomm SoCs for SMEM, SMD and SMD-RPM, used to
communicate with power management blocks on these SoCs for use by
clock, regulator and bus frequency drivers.
- Allwinner Reduced Serial Bus driver, again used to communicate with
PMICs.
- Drivers for ARM's SCPI (System Control Processor). Not to be
confused with PSCI (Power State Coordination Interface). SCPI is
used to communicate with the assistant embedded cores doing power
management, and we have yet to see how many of them will implement
this for their hardware vs abstracting in other ways (or not at all
like in the past).
- To make confusion between SCPI and PSCI more likely, this release
also includes an update of PSCI to interface version 1.0.
- Rockchip support for power domains.
- A driver to talk to the firmware on Raspberry Pi"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (57 commits)
soc: qcom: smd-rpm: Correct size of outgoing message
bus: sunxi-rsb: Add driver for Allwinner Reduced Serial Bus
bus: sunxi-rsb: Add Allwinner Reduced Serial Bus (RSB) controller bindings
ARM: bcm2835: add mutual inclusion protection
drivers: psci: make PSCI 1.0 functions initialization version dependent
dt-bindings: Correct paths in Rockchip power domains binding document
soc: rockchip: power-domain: don't try to print the clock name in error case
soc: qcom/smem: add HWSPINLOCK dependency
clk: berlin: add cpuclk
ARM: berlin: dts: add CLKID_CPU for BG2Q
ARM: bcm2835: Add the Raspberry Pi firmware driver
soc: qcom: smem: Move RPM message ram out of smem DT node
soc: qcom: smd-rpm: Correct the active vs sleep state flagging
soc: qcom: smd: delete unneeded of_node_put
firmware: qcom-scm: build for correct architecture level
soc: qcom: smd: Correct SMEM items for upper channels
qcom-scm: add missing prototype for qcom_scm_is_available()
qcom-scm: fix endianess issue in __qcom_scm_is_call_available
soc: qcom: smd: Reject send of too big packets
soc: qcom: smd: Handle big endian CPUs
...
390 lines
11 KiB
C
390 lines
11 KiB
C
/*
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* Copyright (c) 2014 Marvell Technology Group Ltd.
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*
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* Alexandre Belloni <alexandre.belloni@free-electrons.com>
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* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/slab.h>
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#include <dt-bindings/clock/berlin2q.h>
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#include "berlin2-div.h"
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#include "berlin2-pll.h"
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#include "common.h"
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#define REG_PINMUX0 0x0018
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#define REG_PINMUX5 0x002c
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#define REG_SYSPLLCTL0 0x0030
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#define REG_SYSPLLCTL4 0x0040
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#define REG_CLKENABLE 0x00e8
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#define REG_CLKSELECT0 0x00ec
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#define REG_CLKSELECT1 0x00f0
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#define REG_CLKSELECT2 0x00f4
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#define REG_CLKSWITCH0 0x00f8
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#define REG_CLKSWITCH1 0x00fc
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#define REG_SW_GENERIC0 0x0110
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#define REG_SW_GENERIC3 0x011c
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#define REG_SDIO0XIN_CLKCTL 0x0158
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#define REG_SDIO1XIN_CLKCTL 0x015c
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#define MAX_CLKS 28
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static struct clk *clks[MAX_CLKS];
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static struct clk_onecell_data clk_data;
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static DEFINE_SPINLOCK(lock);
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static void __iomem *gbase;
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static void __iomem *cpupll_base;
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enum {
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REFCLK,
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SYSPLL, CPUPLL,
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AVPLL_B1, AVPLL_B2, AVPLL_B3, AVPLL_B4,
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AVPLL_B5, AVPLL_B6, AVPLL_B7, AVPLL_B8,
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};
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static const char *clk_names[] = {
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[REFCLK] = "refclk",
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[SYSPLL] = "syspll",
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[CPUPLL] = "cpupll",
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[AVPLL_B1] = "avpll_b1",
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[AVPLL_B2] = "avpll_b2",
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[AVPLL_B3] = "avpll_b3",
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[AVPLL_B4] = "avpll_b4",
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[AVPLL_B5] = "avpll_b5",
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[AVPLL_B6] = "avpll_b6",
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[AVPLL_B7] = "avpll_b7",
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[AVPLL_B8] = "avpll_b8",
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};
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static const struct berlin2_pll_map bg2q_pll_map __initconst = {
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.vcodiv = {1, 0, 2, 0, 3, 4, 0, 6, 8},
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.mult = 1,
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.fbdiv_shift = 7,
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.rfdiv_shift = 2,
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.divsel_shift = 9,
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};
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static const u8 default_parent_ids[] = {
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SYSPLL, AVPLL_B4, AVPLL_B5, AVPLL_B6, AVPLL_B7, SYSPLL
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};
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static const struct berlin2_div_data bg2q_divs[] __initconst = {
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{
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.name = "sys",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 0),
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BERLIN2_PLL_SELECT(REG_CLKSELECT0, 0),
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BERLIN2_DIV_SELECT(REG_CLKSELECT0, 3),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 3),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 4),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 5),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = CLK_IGNORE_UNUSED,
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},
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{
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.name = "drmfigo",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 17),
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BERLIN2_PLL_SELECT(REG_CLKSELECT0, 6),
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BERLIN2_DIV_SELECT(REG_CLKSELECT0, 9),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 6),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 7),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 8),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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{
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.name = "cfg",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 1),
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BERLIN2_PLL_SELECT(REG_CLKSELECT0, 12),
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BERLIN2_DIV_SELECT(REG_CLKSELECT0, 15),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 9),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 10),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 11),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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{
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.name = "gfx2d",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 4),
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BERLIN2_PLL_SELECT(REG_CLKSELECT0, 18),
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BERLIN2_DIV_SELECT(REG_CLKSELECT0, 21),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 12),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 13),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 14),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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{
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.name = "zsp",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 6),
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BERLIN2_PLL_SELECT(REG_CLKSELECT0, 24),
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BERLIN2_DIV_SELECT(REG_CLKSELECT0, 27),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 15),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 16),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 17),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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{
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.name = "perif",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 7),
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BERLIN2_PLL_SELECT(REG_CLKSELECT1, 0),
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BERLIN2_DIV_SELECT(REG_CLKSELECT1, 3),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 18),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 19),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 20),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = CLK_IGNORE_UNUSED,
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},
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{
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.name = "pcube",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 2),
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BERLIN2_PLL_SELECT(REG_CLKSELECT1, 6),
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BERLIN2_DIV_SELECT(REG_CLKSELECT1, 9),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 21),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 22),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 23),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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{
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.name = "vscope",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 3),
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BERLIN2_PLL_SELECT(REG_CLKSELECT1, 12),
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BERLIN2_DIV_SELECT(REG_CLKSELECT1, 15),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 24),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 25),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 26),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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{
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.name = "nfc_ecc",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 19),
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BERLIN2_PLL_SELECT(REG_CLKSELECT1, 18),
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BERLIN2_DIV_SELECT(REG_CLKSELECT1, 21),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 27),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 28),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 29),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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{
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.name = "vpp",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 21),
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BERLIN2_PLL_SELECT(REG_CLKSELECT1, 24),
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BERLIN2_DIV_SELECT(REG_CLKSELECT1, 27),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 30),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 31),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 0),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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{
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.name = "app",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_DIV_GATE(REG_CLKENABLE, 20),
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BERLIN2_PLL_SELECT(REG_CLKSELECT2, 0),
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BERLIN2_DIV_SELECT(REG_CLKSELECT2, 3),
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BERLIN2_PLL_SWITCH(REG_CLKSWITCH1, 1),
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BERLIN2_DIV_SWITCH(REG_CLKSWITCH1, 2),
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BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 3),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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{
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.name = "sdio0xin",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_SINGLE_DIV(REG_SDIO0XIN_CLKCTL),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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{
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.name = "sdio1xin",
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.parent_ids = default_parent_ids,
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.num_parents = ARRAY_SIZE(default_parent_ids),
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.map = {
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BERLIN2_SINGLE_DIV(REG_SDIO1XIN_CLKCTL),
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},
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.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
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.flags = 0,
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},
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};
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static const struct berlin2_gate_data bg2q_gates[] __initconst = {
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{ "gfx2daxi", "perif", 5 },
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{ "geth0", "perif", 8 },
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{ "sata", "perif", 9 },
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{ "ahbapb", "perif", 10, CLK_IGNORE_UNUSED },
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{ "usb0", "perif", 11 },
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{ "usb1", "perif", 12 },
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{ "usb2", "perif", 13 },
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{ "usb3", "perif", 14 },
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{ "pbridge", "perif", 15, CLK_IGNORE_UNUSED },
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{ "sdio", "perif", 16 },
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{ "nfc", "perif", 18 },
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{ "pcie", "perif", 22 },
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};
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static void __init berlin2q_clock_setup(struct device_node *np)
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{
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struct device_node *parent_np = of_get_parent(np);
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const char *parent_names[9];
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struct clk *clk;
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int n;
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gbase = of_iomap(parent_np, 0);
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if (!gbase) {
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pr_err("%s: Unable to map global base\n", np->full_name);
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return;
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}
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/* BG2Q CPU PLL is not part of global registers */
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cpupll_base = of_iomap(parent_np, 1);
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if (!cpupll_base) {
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pr_err("%s: Unable to map cpupll base\n", np->full_name);
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iounmap(gbase);
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return;
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}
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/* overwrite default clock names with DT provided ones */
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clk = of_clk_get_by_name(np, clk_names[REFCLK]);
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if (!IS_ERR(clk)) {
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clk_names[REFCLK] = __clk_get_name(clk);
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clk_put(clk);
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}
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/* simple register PLLs */
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clk = berlin2_pll_register(&bg2q_pll_map, gbase + REG_SYSPLLCTL0,
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clk_names[SYSPLL], clk_names[REFCLK], 0);
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if (IS_ERR(clk))
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goto bg2q_fail;
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clk = berlin2_pll_register(&bg2q_pll_map, cpupll_base,
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clk_names[CPUPLL], clk_names[REFCLK], 0);
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if (IS_ERR(clk))
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goto bg2q_fail;
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/* TODO: add BG2Q AVPLL */
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/*
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* TODO: add reference clock bypass switches:
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* memPLLSWBypass, cpuPLLSWBypass, and sysPLLSWBypass
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*/
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/* clock divider cells */
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for (n = 0; n < ARRAY_SIZE(bg2q_divs); n++) {
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const struct berlin2_div_data *dd = &bg2q_divs[n];
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int k;
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for (k = 0; k < dd->num_parents; k++)
|
|
parent_names[k] = clk_names[dd->parent_ids[k]];
|
|
|
|
clks[CLKID_SYS + n] = berlin2_div_register(&dd->map, gbase,
|
|
dd->name, dd->div_flags, parent_names,
|
|
dd->num_parents, dd->flags, &lock);
|
|
}
|
|
|
|
/* clock gate cells */
|
|
for (n = 0; n < ARRAY_SIZE(bg2q_gates); n++) {
|
|
const struct berlin2_gate_data *gd = &bg2q_gates[n];
|
|
|
|
clks[CLKID_GFX2DAXI + n] = clk_register_gate(NULL, gd->name,
|
|
gd->parent_name, gd->flags, gbase + REG_CLKENABLE,
|
|
gd->bit_idx, 0, &lock);
|
|
}
|
|
|
|
/* cpuclk divider is fixed to 1 */
|
|
clks[CLKID_CPU] =
|
|
clk_register_fixed_factor(NULL, "cpu", clk_names[CPUPLL],
|
|
0, 1, 1);
|
|
/* twdclk is derived from cpu/3 */
|
|
clks[CLKID_TWD] =
|
|
clk_register_fixed_factor(NULL, "twd", "cpu", 0, 1, 3);
|
|
|
|
/* check for errors on leaf clocks */
|
|
for (n = 0; n < MAX_CLKS; n++) {
|
|
if (!IS_ERR(clks[n]))
|
|
continue;
|
|
|
|
pr_err("%s: Unable to register leaf clock %d\n",
|
|
np->full_name, n);
|
|
goto bg2q_fail;
|
|
}
|
|
|
|
/* register clk-provider */
|
|
clk_data.clks = clks;
|
|
clk_data.clk_num = MAX_CLKS;
|
|
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
|
|
|
|
return;
|
|
|
|
bg2q_fail:
|
|
iounmap(cpupll_base);
|
|
iounmap(gbase);
|
|
}
|
|
CLK_OF_DECLARE(berlin2q_clk, "marvell,berlin2q-clk",
|
|
berlin2q_clock_setup);
|