[PATCH 2/2] ARM: tegra: Convert PMC to a driver

Thierry Reding
2014-07-07T14:16:50Z

This commit converts the PMC support code to a platform driver. Because
the boot process needs to call into this driver very early, set up a
minimalistic environment via an early initcall.

While at it, also move the driver out to drivers/power so that it can be
shared with 64-bit SoCs.

Signed-off-by: Thierry Reding <treding-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
arch/arm/mach-tegra/Makefile | 2 -
arch/arm/mach-tegra/board.h | 7 -
arch/arm/mach-tegra/platsmp.c | 1 -
arch/arm/mach-tegra/pm.c | 30 +-
arch/arm/mach-tegra/pm.h | 10 +-
arch/arm/mach-tegra/pmc.c | 402 -----------------
arch/arm/mach-tegra/pmc.h | 62 ---
arch/arm/mach-tegra/powergate.c | 503 ---------------------
arch/arm/mach-tegra/tegra.c | 6 -
drivers/power/Makefile | 1 +
drivers/power/tegra-pmc.c | 948 ++++++++++++++++++++++++++++++++++++++++
include/linux/tegra-soc.h | 46 ++
12 files changed, 1018 insertions(+), 1000 deletions(-)
delete mode 100644 arch/arm/mach-tegra/pmc.c
delete mode 100644 arch/arm/mach-tegra/pmc.h
delete mode 100644 arch/arm/mach-tegra/powergate.c
create mode 100644 drivers/power/tegra-pmc.c

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index c303b55de22e..e48a74458c25 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -2,9 +2,7 @@ asflags-y += -march=armv7-a

obj-y += io.o
obj-y += irq.o
-obj-y += pmc.o
obj-y += flowctrl.o
-obj-y += powergate.o
obj-y += pm.o
obj-y += reset.o
obj-y += reset-handler.o
diff --git a/arch/arm/mach-tegra/board.h b/arch/arm/mach-tegra/board.h
index bcf5dbf69d58..da90c89296b9 100644
--- a/arch/arm/mach-tegra/board.h
+++ b/arch/arm/mach-tegra/board.h
@@ -28,13 +28,6 @@
void __init tegra_map_common_io(void);
void __init tegra_init_irq(void);

-int __init tegra_powergate_init(void);
-#if defined(CONFIG_ARCH_TEGRA_2x_SOC) && defined(CONFIG_DEBUG_FS)
-int __init tegra_powergate_debugfs_init(void);
-#else
-static inline int tegra_powergate_debugfs_init(void) { return 0; }
-#endif
-
void __init tegra_paz00_wifikill_init(void);

#endif
diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c
index d9878acae3d2..1862d44cc0d6 100644
--- a/arch/arm/mach-tegra/platsmp.c
+++ b/arch/arm/mach-tegra/platsmp.c
@@ -28,7 +28,6 @@

#include "flowctrl.h"
#include "reset.h"
-#include "pmc.h"

#include "common.h"
#include "iomap.h"
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index d7e6370ea8dc..41e6b1910dcc 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -39,7 +39,6 @@
#include "reset.h"
#include "flowctrl.h"
#include "pm.h"
-#include "pmc.h"
#include "sleep.h"

#ifdef CONFIG_PM_SLEEP
@@ -166,9 +165,29 @@ static int tegra_sleep_cpu(unsigned long v2p)
return 0;
}

+static void tegra_pm_set(enum tegra_suspend_mode mode)
+{
+ u32 value;
+
+ switch (tegra_chip_id) {
+ case TEGRA20:
+ case TEGRA30:
+ break;
+ default:
+ /* Turn off CRAIL */
+ value = flowctrl_read_cpu_csr(0);
+ value &= ~FLOW_CTRL_CSR_ENABLE_EXT_MASK;
+ value |= FLOW_CTRL_CSR_ENABLE_EXT_CRAIL;
+ flowctrl_write_cpu_csr(0, value);
+ break;
+ }
+
+ tegra_pmc_enter_suspend_mode(mode);
+}
+
void tegra_idle_lp2_last(void)
{
- tegra_pmc_pm_set(TEGRA_SUSPEND_LP2);
+ tegra_pm_set(TEGRA_SUSPEND_LP2);

cpu_cluster_pm_enter();
suspend_cpu_complex();
@@ -267,8 +286,6 @@ static bool tegra_sleep_core_init(void)

static void tegra_suspend_enter_lp1(void)
{
- tegra_pmc_suspend();
-
/* copy the reset vector & SDRAM shutdown code into IRAM */
memcpy(iram_save_addr, IO_ADDRESS(TEGRA_IRAM_LPx_RESUME_AREA),
iram_save_size);
@@ -280,8 +297,6 @@ static void tegra_suspend_enter_lp1(void)

static void tegra_suspend_exit_lp1(void)
{
- tegra_pmc_resume();
-
/* restore IRAM */
memcpy(IO_ADDRESS(TEGRA_IRAM_LPx_RESUME_AREA), iram_save_addr,
iram_save_size);
@@ -306,7 +321,7 @@ static int tegra_suspend_enter(suspend_state_t state)

pr_info("Entering suspend state %s\n", lp_state[mode]);

- tegra_pmc_pm_set(mode);
+ tegra_pm_set(mode);

local_fiq_disable();

@@ -354,7 +369,6 @@ void __init tegra_init_suspend(void)
return;

tegra_tear_down_cpu_init();
- tegra_pmc_suspend_init();

if (mode >= TEGRA_SUSPEND_LP1) {
if (!tegra_lp1_iram_hook() || !tegra_sleep_core_init()) {
diff --git a/arch/arm/mach-tegra/pm.h b/arch/arm/mach-tegra/pm.h
index f4a89698e5b0..83bc87583446 100644
--- a/arch/arm/mach-tegra/pm.h
+++ b/arch/arm/mach-tegra/pm.h
@@ -21,12 +21,11 @@
#ifndef _MACH_TEGRA_PM_H_
#define _MACH_TEGRA_PM_H_

-#include "pmc.h"
-
struct tegra_lp1_iram {
void *start_addr;
void *end_addr;
};
+
extern struct tegra_lp1_iram tegra_lp1_iram;
extern void (*tegra_sleep_core_finish)(unsigned long v2p);

@@ -42,15 +41,8 @@ void tegra_idle_lp2_last(void);
extern void (*tegra_tear_down_cpu)(void);

#ifdef CONFIG_PM_SLEEP
-enum tegra_suspend_mode tegra_pm_validate_suspend_mode(
- enum tegra_suspend_mode mode);
void tegra_init_suspend(void);
#else
-static inline enum tegra_suspend_mode tegra_pm_validate_suspend_mode(
- enum tegra_suspend_mode mode)
-{
- return TEGRA_SUSPEND_NONE;
-}
static inline void tegra_init_suspend(void) {}
#endif

diff --git a/arch/arm/mach-tegra/pmc.c b/arch/arm/mach-tegra/pmc.c
deleted file mode 100644
index e1677c0a78db..000000000000
--- a/arch/arm/mach-tegra/pmc.c
+++ /dev/null
@@ -1,402 +0,0 @@
-/*
- * Copyright (C) 2012,2013 NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/clk.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/tegra-powergate.h>
-#include <linux/tegra-soc.h>
-
-#include "flowctrl.h"
-#include "pm.h"
-#include "pmc.h"
-#include "sleep.h"
-
-#define TEGRA_POWER_SYSCLK_POLARITY (1 << 10) /* sys clk polarity */
-#define TEGRA_POWER_SYSCLK_OE (1 << 11) /* system clock enable */
-#define TEGRA_POWER_EFFECT_LP0 (1 << 14) /* LP0 when CPU pwr gated */
-#define TEGRA_POWER_CPU_PWRREQ_POLARITY (1 << 15) /* CPU pwr req polarity */
-#define TEGRA_POWER_CPU_PWRREQ_OE (1 << 16) /* CPU pwr req enable */
-
-#define PMC_CTRL 0x0
-#define PMC_CTRL_INTR_LOW (1 << 17)
-#define PMC_PWRGATE_TOGGLE 0x30
-#define PMC_PWRGATE_TOGGLE_START (1 << 8)
-#define PMC_REMOVE_CLAMPING 0x34
-#define PMC_PWRGATE_STATUS 0x38
-
-#define PMC_SCRATCH0 0x50
-#define PMC_SCRATCH0_MODE_RECOVERY (1 << 31)
-#define PMC_SCRATCH0_MODE_BOOTLOADER (1 << 30)
-#define PMC_SCRATCH0_MODE_RCM (1 << 1)
-#define PMC_SCRATCH0_MODE_MASK (PMC_SCRATCH0_MODE_RECOVERY | \
- PMC_SCRATCH0_MODE_BOOTLOADER | \
- PMC_SCRATCH0_MODE_RCM)
-
-#define PMC_CPUPWRGOOD_TIMER 0xc8
-#define PMC_CPUPWROFF_TIMER 0xcc
-
-static u8 tegra_cpu_domains[] = {
- 0xFF, /* not available for CPU0 */
- TEGRA_POWERGATE_CPU1,
- TEGRA_POWERGATE_CPU2,
- TEGRA_POWERGATE_CPU3,
-};
-static DEFINE_SPINLOCK(tegra_powergate_lock);
-
-static bool tegra_pmc_invert_interrupt;
-static struct clk *tegra_pclk;
-void __iomem *tegra_pmc_base;
-
-struct pmc_pm_data {
- u32 cpu_good_time; /* CPU power good time in uS */
- u32 cpu_off_time; /* CPU power off time in uS */
- u32 core_osc_time; /* Core power good osc time in uS */
- u32 core_pmu_time; /* Core power good pmu time in uS */
- u32 core_off_time; /* Core power off time in uS */
- bool corereq_high; /* Core power request active-high */
- bool sysclkreq_high; /* System clock request active-high */
- bool combined_req; /* Combined pwr req for CPU & Core */
- bool cpu_pwr_good_en; /* CPU power good signal is enabled */
- u32 lp0_vec_phy_addr; /* The phy addr of LP0 warm boot code */
- u32 lp0_vec_size; /* The size of LP0 warm boot code */
- enum tegra_suspend_mode suspend_mode;
-};
-static struct pmc_pm_data pmc_pm_data;
-
-static int tegra_pmc_get_cpu_powerdomain_id(int cpuid)
-{
- if (cpuid <= 0 || cpuid >= num_possible_cpus())
- return -EINVAL;
- return tegra_cpu_domains[cpuid];
-}
-
-static bool tegra_pmc_powergate_is_powered(int id)
-{
- return (tegra_pmc_readl(PMC_PWRGATE_STATUS) >> id) & 1;
-}
-
-static int tegra_pmc_powergate_set(int id, bool new_state)
-{
- bool old_state;
- unsigned long flags;
-
- spin_lock_irqsave(&tegra_powergate_lock, flags);
-
- old_state = tegra_pmc_powergate_is_powered(id);
- WARN_ON(old_state == new_state);
-
- tegra_pmc_writel(PMC_PWRGATE_TOGGLE_START | id, PMC_PWRGATE_TOGGLE);
-
- spin_unlock_irqrestore(&tegra_powergate_lock, flags);
-
- return 0;
-}
-
-static int tegra_pmc_powergate_remove_clamping(int id)
-{
- u32 mask;
-
- /*
- * Tegra has a bug where PCIE and VDE clamping masks are
- * swapped relatively to the partition ids.
- */
- if (id == TEGRA_POWERGATE_VDEC)
- mask = (1 << TEGRA_POWERGATE_PCIE);
- else if (id == TEGRA_POWERGATE_PCIE)
- mask = (1 << TEGRA_POWERGATE_VDEC);
- else
- mask = (1 << id);
-
- tegra_pmc_writel(mask, PMC_REMOVE_CLAMPING);
-
- return 0;
-}
-
-bool tegra_pmc_cpu_is_powered(int cpuid)
-{
- int id;
-
- id = tegra_pmc_get_cpu_powerdomain_id(cpuid);
- if (id < 0)
- return false;
- return tegra_pmc_powergate_is_powered(id);
-}
-
-int tegra_pmc_cpu_power_on(int cpuid)
-{
- int id;
-
- id = tegra_pmc_get_cpu_powerdomain_id(cpuid);
- if (id < 0)
- return id;
- return tegra_pmc_powergate_set(id, true);
-}
-
-int tegra_pmc_cpu_remove_clamping(int cpuid)
-{
- int id;
-
- id = tegra_pmc_get_cpu_powerdomain_id(cpuid);
- if (id < 0)
- return id;
- return tegra_pmc_powergate_remove_clamping(id);
-}
-
-void tegra_pmc_restart(enum reboot_mode mode, const char *cmd)
-{
- u32 val;
-
- val = tegra_pmc_readl(PMC_SCRATCH0);
- val &= ~PMC_SCRATCH0_MODE_MASK;
-
- if (cmd) {
- if (strcmp(cmd, "recovery") == 0)
- val |= PMC_SCRATCH0_MODE_RECOVERY;
-
- if (strcmp(cmd, "bootloader") == 0)
- val |= PMC_SCRATCH0_MODE_BOOTLOADER;
-
- if (strcmp(cmd, "forced-recovery") == 0)
- val |= PMC_SCRATCH0_MODE_RCM;
- }
-
- tegra_pmc_writel(val, PMC_SCRATCH0);
-
- val = tegra_pmc_readl(0);
- val |= 0x10;
- tegra_pmc_writel(val, 0);
-}
-
-#ifdef CONFIG_PM_SLEEP
-static void set_power_timers(u32 us_on, u32 us_off, unsigned long rate)
-{
- unsigned long long ticks;
- unsigned long long pclk;
- static unsigned long tegra_last_pclk;
-
- if (WARN_ON_ONCE(rate <= 0))
- pclk = 100000000;
- else
- pclk = rate;
-
- if ((rate != tegra_last_pclk)) {
- ticks = (us_on * pclk) + 999999ull;
- do_div(ticks, 1000000);
- tegra_pmc_writel((unsigned long)ticks, PMC_CPUPWRGOOD_TIMER);
-
- ticks = (us_off * pclk) + 999999ull;
- do_div(ticks, 1000000);
- tegra_pmc_writel((unsigned long)ticks, PMC_CPUPWROFF_TIMER);
- wmb();
- }
- tegra_last_pclk = pclk;
-}
-
-enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void)
-{
- return pmc_pm_data.suspend_mode;
-}
-
-void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode)
-{
- if (mode < TEGRA_SUSPEND_NONE || mode >= TEGRA_MAX_SUSPEND_MODE)
- return;
-
- pmc_pm_data.suspend_mode = mode;
-}
-
-void tegra_pmc_suspend(void)
-{
- tegra_pmc_writel(virt_to_phys(tegra_resume), PMC_SCRATCH41);
-}
-
-void tegra_pmc_resume(void)
-{
- tegra_pmc_writel(0x0, PMC_SCRATCH41);
-}
-
-void tegra_pmc_pm_set(enum tegra_suspend_mode mode)
-{
- u32 reg, csr_reg;
- unsigned long rate = 0;
-
- reg = tegra_pmc_readl(PMC_CTRL);
- reg |= TEGRA_POWER_CPU_PWRREQ_OE;
- reg &= ~TEGRA_POWER_EFFECT_LP0;
-
- switch (tegra_chip_id) {
- case TEGRA20:
- case TEGRA30:
- break;
- default:
- /* Turn off CRAIL */
- csr_reg = flowctrl_read_cpu_csr(0);
- csr_reg &= ~FLOW_CTRL_CSR_ENABLE_EXT_MASK;
- csr_reg |= FLOW_CTRL_CSR_ENABLE_EXT_CRAIL;
- flowctrl_write_cpu_csr(0, csr_reg);
- break;
- }
-
- switch (mode) {
- case TEGRA_SUSPEND_LP1:
- rate = 32768;
- break;
- case TEGRA_SUSPEND_LP2:
- rate = clk_get_rate(tegra_pclk);
- break;
- default:
- break;
- }
-
- set_power_timers(pmc_pm_data.cpu_good_time, pmc_pm_data.cpu_off_time,
- rate);
-
- tegra_pmc_writel(reg, PMC_CTRL);
-}
-
-void tegra_pmc_suspend_init(void)
-{
- u32 reg;
-
- /* Always enable CPU power request */
- reg = tegra_pmc_readl(PMC_CTRL);
- reg |= TEGRA_POWER_CPU_PWRREQ_OE;
- tegra_pmc_writel(reg, PMC_CTRL);
-
- reg = tegra_pmc_readl(PMC_CTRL);
-
- if (!pmc_pm_data.sysclkreq_high)
- reg |= TEGRA_POWER_SYSCLK_POLARITY;
- else
- reg &= ~TEGRA_POWER_SYSCLK_POLARITY;
-
- /* configure the output polarity while the request is tristated */
- tegra_pmc_writel(reg, PMC_CTRL);
-
- /* now enable the request */
- reg |= TEGRA_POWER_SYSCLK_OE;
- tegra_pmc_writel(reg, PMC_CTRL);
-}
-#endif
-
-static const struct of_device_id matches[] __initconst = {
- { .compatible = "nvidia,tegra124-pmc" },
- { .compatible = "nvidia,tegra114-pmc" },
- { .compatible = "nvidia,tegra30-pmc" },
- { .compatible = "nvidia,tegra20-pmc" },
- { }
-};
-
-void __init tegra_pmc_init_irq(void)
-{
- struct device_node *np;
- u32 val;
-
- np = of_find_matching_node(NULL, matches);
- BUG_ON(!np);
-
- tegra_pmc_base = of_iomap(np, 0);
-
- tegra_pmc_invert_interrupt = of_property_read_bool(np,
- "nvidia,invert-interrupt");
-
- val = tegra_pmc_readl(PMC_CTRL);
- if (tegra_pmc_invert_interrupt)
- val |= PMC_CTRL_INTR_LOW;
- else
- val &= ~PMC_CTRL_INTR_LOW;
- tegra_pmc_writel(val, PMC_CTRL);
-}
-
-void __init tegra_pmc_init(void)
-{
- struct device_node *np;
- u32 prop;
- enum tegra_suspend_mode suspend_mode;
- u32 core_good_time[2] = {0, 0};
- u32 lp0_vec[2] = {0, 0};
-
- np = of_find_matching_node(NULL, matches);
- BUG_ON(!np);
-
- tegra_pclk = of_clk_get_by_name(np, "pclk");
- WARN_ON(IS_ERR(tegra_pclk));
-
- /* Grabbing the power management configurations */
- if (of_property_read_u32(np, "nvidia,suspend-mode", &prop)) {
- suspend_mode = TEGRA_SUSPEND_NONE;
- } else {
- switch (prop) {
- case 0:
- suspend_mode = TEGRA_SUSPEND_LP0;
- break;
- case 1:
- suspend_mode = TEGRA_SUSPEND_LP1;
- break;
- case 2:
- suspend_mode = TEGRA_SUSPEND_LP2;
- break;
- default:
- suspend_mode = TEGRA_SUSPEND_NONE;
- break;
- }
- }
- suspend_mode = tegra_pm_validate_suspend_mode(suspend_mode);
-
- if (of_property_read_u32(np, "nvidia,cpu-pwr-good-time", &prop))
- suspend_mode = TEGRA_SUSPEND_NONE;
- pmc_pm_data.cpu_good_time = prop;
-
- if (of_property_read_u32(np, "nvidia,cpu-pwr-off-time", &prop))
- suspend_mode = TEGRA_SUSPEND_NONE;
- pmc_pm_data.cpu_off_time = prop;
-
- if (of_property_read_u32_array(np, "nvidia,core-pwr-good-time",
- core_good_time, ARRAY_SIZE(core_good_time)))
- suspend_mode = TEGRA_SUSPEND_NONE;
- pmc_pm_data.core_osc_time = core_good_time[0];
- pmc_pm_data.core_pmu_time = core_good_time[1];
-
- if (of_property_read_u32(np, "nvidia,core-pwr-off-time",
- &prop))
- suspend_mode = TEGRA_SUSPEND_NONE;
- pmc_pm_data.core_off_time = prop;
-
- pmc_pm_data.corereq_high = of_property_read_bool(np,
- "nvidia,core-power-req-active-high");
-
- pmc_pm_data.sysclkreq_high = of_property_read_bool(np,
- "nvidia,sys-clock-req-active-high");
-
- pmc_pm_data.combined_req = of_property_read_bool(np,
- "nvidia,combined-power-req");
-
- pmc_pm_data.cpu_pwr_good_en = of_property_read_bool(np,
- "nvidia,cpu-pwr-good-en");
-
- if (of_property_read_u32_array(np, "nvidia,lp0-vec", lp0_vec,
- ARRAY_SIZE(lp0_vec)))
- if (suspend_mode == TEGRA_SUSPEND_LP0)
- suspend_mode = TEGRA_SUSPEND_LP1;
-
- pmc_pm_data.lp0_vec_phy_addr = lp0_vec[0];
- pmc_pm_data.lp0_vec_size = lp0_vec[1];
-
- pmc_pm_data.suspend_mode = suspend_mode;
-}
diff --git a/arch/arm/mach-tegra/pmc.h b/arch/arm/mach-tegra/pmc.h
deleted file mode 100644
index 139a30867cb2..000000000000
--- a/arch/arm/mach-tegra/pmc.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#ifndef __MACH_TEGRA_PMC_H
-#define __MACH_TEGRA_PMC_H
-
-#include <linux/io.h>
-#include <linux/reboot.h>
-
-enum tegra_suspend_mode {
- TEGRA_SUSPEND_NONE = 0,
- TEGRA_SUSPEND_LP2, /* CPU voltage off */
- TEGRA_SUSPEND_LP1, /* CPU voltage off, DRAM self-refresh */
- TEGRA_SUSPEND_LP0, /* CPU + core voltage off, DRAM self-refresh */
- TEGRA_MAX_SUSPEND_MODE,
-};
-
-#ifdef CONFIG_PM_SLEEP
-enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void);
-void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode);
-void tegra_pmc_suspend(void);
-void tegra_pmc_resume(void);
-void tegra_pmc_pm_set(enum tegra_suspend_mode mode);
-void tegra_pmc_suspend_init(void);
-#endif
-
-extern void __iomem *tegra_pmc_base;
-
-static inline u32 tegra_pmc_readl(u32 reg)
-{
- return readl(tegra_pmc_base + reg);
-}
-
-static inline void tegra_pmc_writel(u32 val, u32 reg)
-{
- writel(val, tegra_pmc_base + reg);
-}
-
-bool tegra_pmc_cpu_is_powered(int cpuid);
-int tegra_pmc_cpu_power_on(int cpuid);
-int tegra_pmc_cpu_remove_clamping(int cpuid);
-
-void tegra_pmc_restart(enum reboot_mode mode, const char *cmd);
-
-void tegra_pmc_init_irq(void);
-void tegra_pmc_init(void);
-
-#endif
diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c
deleted file mode 100644
index c90f303aad4a..000000000000
--- a/arch/arm/mach-tegra/powergate.c
+++ /dev/null
@@ -1,503 +0,0 @@
-/*
- * drivers/powergate/tegra-powergate.c
- *
- * Copyright (c) 2010 Google, Inc
- *
- * Author:
- * Colin Cross <ccross-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/clk.h>
-#include <linux/debugfs.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/export.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/reset.h>
-#include <linux/seq_file.h>
-#include <linux/spinlock.h>
-#include <linux/clk/tegra.h>
-#include <linux/tegra-powergate.h>
-#include <linux/tegra-soc.h>
-
-#include "pmc.h"
-
-#define DPD_SAMPLE 0x020
-#define DPD_SAMPLE_ENABLE (1 << 0)
-#define DPD_SAMPLE_DISABLE (0 << 0)
-
-#define PWRGATE_TOGGLE 0x30
-#define PWRGATE_TOGGLE_START (1 << 8)
-
-#define REMOVE_CLAMPING 0x34
-
-#define PWRGATE_STATUS 0x38
-
-#define IO_DPD_REQ 0x1b8
-#define IO_DPD_REQ_CODE_IDLE (0 << 30)
-#define IO_DPD_REQ_CODE_OFF (1 << 30)
-#define IO_DPD_REQ_CODE_ON (2 << 30)
-#define IO_DPD_REQ_CODE_MASK (3 << 30)
-
-#define IO_DPD_STATUS 0x1bc
-#define IO_DPD2_REQ 0x1c0
-#define IO_DPD2_STATUS 0x1c4
-#define SEL_DPD_TIM 0x1c8
-
-#define GPU_RG_CNTRL 0x2d4
-
-static int tegra_num_powerdomains;
-static int tegra_num_cpu_domains;
-static const u8 *tegra_cpu_domains;
-
-static const u8 tegra30_cpu_domains[] = {
- TEGRA_POWERGATE_CPU,
- TEGRA_POWERGATE_CPU1,
- TEGRA_POWERGATE_CPU2,
- TEGRA_POWERGATE_CPU3,
-};
-
-static const u8 tegra114_cpu_domains[] = {
- TEGRA_POWERGATE_CPU0,
- TEGRA_POWERGATE_CPU1,
- TEGRA_POWERGATE_CPU2,
- TEGRA_POWERGATE_CPU3,
-};
-
-static const u8 tegra124_cpu_domains[] = {
- TEGRA_POWERGATE_CPU0,
- TEGRA_POWERGATE_CPU1,
- TEGRA_POWERGATE_CPU2,
- TEGRA_POWERGATE_CPU3,
-};
-
-static DEFINE_SPINLOCK(tegra_powergate_lock);
-
-static int tegra_powergate_set(int id, bool new_state)
-{
- bool status;
- unsigned long flags;
-
- spin_lock_irqsave(&tegra_powergate_lock, flags);
-
- status = tegra_pmc_readl(PWRGATE_STATUS) & (1 << id);
-
- if (status == new_state) {
- spin_unlock_irqrestore(&tegra_powergate_lock, flags);
- return 0;
- }
-
- tegra_pmc_writel(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);
-
- spin_unlock_irqrestore(&tegra_powergate_lock, flags);
-
- return 0;
-}
-
-int tegra_powergate_power_on(int id)
-{
- if (id < 0 || id >= tegra_num_powerdomains)
- return -EINVAL;
-
- return tegra_powergate_set(id, true);
-}
-
-int tegra_powergate_power_off(int id)
-{
- if (id < 0 || id >= tegra_num_powerdomains)
- return -EINVAL;
-
- return tegra_powergate_set(id, false);
-}
-EXPORT_SYMBOL(tegra_powergate_power_off);
-
-int tegra_powergate_is_powered(int id)
-{
- u32 status;
-
- if (id < 0 || id >= tegra_num_powerdomains)
- return -EINVAL;
-
- status = tegra_pmc_readl(PWRGATE_STATUS) & (1 << id);
- return !!status;
-}
-
-int tegra_powergate_remove_clamping(int id)
-{
- u32 mask;
-
- if (id < 0 || id >= tegra_num_powerdomains)
- return -EINVAL;
-
- /*
- * The Tegra124 GPU has a separate register (with different semantics)
- * to remove clamps.
- */
- if (tegra_chip_id == TEGRA124) {
- if (id == TEGRA_POWERGATE_3D) {
- tegra_pmc_writel(0, GPU_RG_CNTRL);
- return 0;
- }
- }
-
- /*
- * Tegra 2 has a bug where PCIE and VDE clamping masks are
- * swapped relatively to the partition ids
- */
- if (id == TEGRA_POWERGATE_VDEC)
- mask = (1 << TEGRA_POWERGATE_PCIE);
- else if (id == TEGRA_POWERGATE_PCIE)
- mask = (1 << TEGRA_POWERGATE_VDEC);
- else
- mask = (1 << id);
-
- tegra_pmc_writel(mask, REMOVE_CLAMPING);
-
- return 0;
-}
-EXPORT_SYMBOL(tegra_powergate_remove_clamping);
-
-/* Must be called with clk disabled, and returns with clk enabled */
-int tegra_powergate_sequence_power_up(int id, struct clk *clk,
- struct reset_control *rst)
-{
- int ret;
-
- reset_control_assert(rst);
-
- ret = tegra_powergate_power_on(id);
- if (ret)
- goto err_power;
-
- ret = clk_prepare_enable(clk);
- if (ret)
- goto err_clk;
-
- udelay(10);
-
- ret = tegra_powergate_remove_clamping(id);
- if (ret)
- goto err_clamp;
-
- udelay(10);
- reset_control_deassert(rst);
-
- return 0;
-
-err_clamp:
- clk_disable_unprepare(clk);
-err_clk:
- tegra_powergate_power_off(id);
-err_power:
- return ret;
-}
-EXPORT_SYMBOL(tegra_powergate_sequence_power_up);
-
-int tegra_cpu_powergate_id(int cpuid)
-{
- if (cpuid > 0 && cpuid < tegra_num_cpu_domains)
- return tegra_cpu_domains[cpuid];
-
- return -EINVAL;
-}
-
-int __init tegra_powergate_init(void)
-{
- switch (tegra_chip_id) {
- case TEGRA20:
- tegra_num_powerdomains = 7;
- break;
- case TEGRA30:
- tegra_num_powerdomains = 14;
- tegra_num_cpu_domains = 4;
- tegra_cpu_domains = tegra30_cpu_domains;
- break;
- case TEGRA114:
- tegra_num_powerdomains = 23;
- tegra_num_cpu_domains = 4;
- tegra_cpu_domains = tegra114_cpu_domains;
- break;
- case TEGRA124:
- tegra_num_powerdomains = 25;
- tegra_num_cpu_domains = 4;
- tegra_cpu_domains = tegra124_cpu_domains;
- break;
- default:
- /* Unknown Tegra variant. Disable powergating */
- tegra_num_powerdomains = 0;
- break;
- }
-
- return 0;
-}
-
-#ifdef CONFIG_DEBUG_FS
-
-static const char * const *powergate_name;
-
-static const char * const powergate_name_t20[] = {
- [TEGRA_POWERGATE_CPU] = "cpu",
- [TEGRA_POWERGATE_3D] = "3d",
- [TEGRA_POWERGATE_VENC] = "venc",
- [TEGRA_POWERGATE_VDEC] = "vdec",
- [TEGRA_POWERGATE_PCIE] = "pcie",
- [TEGRA_POWERGATE_L2] = "l2",
- [TEGRA_POWERGATE_MPE] = "mpe",
-};
-
-static const char * const powergate_name_t30[] = {
- [TEGRA_POWERGATE_CPU] = "cpu0",
- [TEGRA_POWERGATE_3D] = "3d0",
- [TEGRA_POWERGATE_VENC] = "venc",
- [TEGRA_POWERGATE_VDEC] = "vdec",
- [TEGRA_POWERGATE_PCIE] = "pcie",
- [TEGRA_POWERGATE_L2] = "l2",
- [TEGRA_POWERGATE_MPE] = "mpe",
- [TEGRA_POWERGATE_HEG] = "heg",
- [TEGRA_POWERGATE_SATA] = "sata",
- [TEGRA_POWERGATE_CPU1] = "cpu1",
- [TEGRA_POWERGATE_CPU2] = "cpu2",
- [TEGRA_POWERGATE_CPU3] = "cpu3",
- [TEGRA_POWERGATE_CELP] = "celp",
- [TEGRA_POWERGATE_3D1] = "3d1",
-};
-
-static const char * const powergate_name_t114[] = {
- [TEGRA_POWERGATE_CPU] = "crail",
- [TEGRA_POWERGATE_3D] = "3d",
- [TEGRA_POWERGATE_VENC] = "venc",
- [TEGRA_POWERGATE_VDEC] = "vdec",
- [TEGRA_POWERGATE_MPE] = "mpe",
- [TEGRA_POWERGATE_HEG] = "heg",
- [TEGRA_POWERGATE_CPU1] = "cpu1",
- [TEGRA_POWERGATE_CPU2] = "cpu2",
- [TEGRA_POWERGATE_CPU3] = "cpu3",
- [TEGRA_POWERGATE_CELP] = "celp",
- [TEGRA_POWERGATE_CPU0] = "cpu0",
- [TEGRA_POWERGATE_C0NC] = "c0nc",
- [TEGRA_POWERGATE_C1NC] = "c1nc",
- [TEGRA_POWERGATE_DIS] = "dis",
- [TEGRA_POWERGATE_DISB] = "disb",
- [TEGRA_POWERGATE_XUSBA] = "xusba",
- [TEGRA_POWERGATE_XUSBB] = "xusbb",
- [TEGRA_POWERGATE_XUSBC] = "xusbc",
-};
-
-static const char * const powergate_name_t124[] = {
- [TEGRA_POWERGATE_CPU] = "crail",
- [TEGRA_POWERGATE_3D] = "3d",
- [TEGRA_POWERGATE_VENC] = "venc",
- [TEGRA_POWERGATE_PCIE] = "pcie",
- [TEGRA_POWERGATE_VDEC] = "vdec",
- [TEGRA_POWERGATE_L2] = "l2",
- [TEGRA_POWERGATE_MPE] = "mpe",
- [TEGRA_POWERGATE_HEG] = "heg",
- [TEGRA_POWERGATE_SATA] = "sata",
- [TEGRA_POWERGATE_CPU1] = "cpu1",
- [TEGRA_POWERGATE_CPU2] = "cpu2",
- [TEGRA_POWERGATE_CPU3] = "cpu3",
- [TEGRA_POWERGATE_CELP] = "celp",
- [TEGRA_POWERGATE_CPU0] = "cpu0",
- [TEGRA_POWERGATE_C0NC] = "c0nc",
- [TEGRA_POWERGATE_C1NC] = "c1nc",
- [TEGRA_POWERGATE_SOR] = "sor",
- [TEGRA_POWERGATE_DIS] = "dis",
- [TEGRA_POWERGATE_DISB] = "disb",
- [TEGRA_POWERGATE_XUSBA] = "xusba",
- [TEGRA_POWERGATE_XUSBB] = "xusbb",
- [TEGRA_POWERGATE_XUSBC] = "xusbc",
- [TEGRA_POWERGATE_VIC] = "vic",
- [TEGRA_POWERGATE_IRAM] = "iram",
-};
-
-static int powergate_show(struct seq_file *s, void *data)
-{
- int i;
-
- seq_printf(s, " powergate powered\n");
- seq_printf(s, "------------------\n");
-
- for (i = 0; i < tegra_num_powerdomains; i++) {
- if (!powergate_name[i])
- continue;
-
- seq_printf(s, " %9s %7s\n", powergate_name[i],
- tegra_powergate_is_powered(i) ? "yes" : "no");
- }
-
- return 0;
-}
-
-static int powergate_open(struct inode *inode, struct file *file)
-{
- return single_open(file, powergate_show, inode->i_private);
-}
-
-static const struct file_operations powergate_fops = {
- .open = powergate_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-int __init tegra_powergate_debugfs_init(void)
-{
- struct dentry *d;
-
- switch (tegra_chip_id) {
- case TEGRA20:
- powergate_name = powergate_name_t20;
- break;
- case TEGRA30:
- powergate_name = powergate_name_t30;
- break;
- case TEGRA114:
- powergate_name = powergate_name_t114;
- break;
- case TEGRA124:
- powergate_name = powergate_name_t124;
- break;
- }
-
- if (powergate_name) {
- d = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
- &powergate_fops);
- if (!d)
- return -ENOMEM;
- }
-
- return 0;
-}
-
-#endif
-
-static int tegra_io_rail_prepare(int id, unsigned long *request,
- unsigned long *status, unsigned int *bit)
-{
- unsigned long rate, value;
- struct clk *clk;
-
- *bit = id % 32;
-
- /*
- * There are two sets of 30 bits to select IO rails, but bits 30 and
- * 31 are control bits rather than IO rail selection bits.
- */
- if (id > 63 || *bit == 30 || *bit == 31)
- return -EINVAL;
-
- if (id < 32) {
- *status = IO_DPD_STATUS;
- *request = IO_DPD_REQ;
- } else {
- *status = IO_DPD2_STATUS;
- *request = IO_DPD2_REQ;
- }
-
- clk = clk_get_sys(NULL, "pclk");
- if (IS_ERR(clk))
- return PTR_ERR(clk);
-
- rate = clk_get_rate(clk);
- clk_put(clk);
-
- tegra_pmc_writel(DPD_SAMPLE_ENABLE, DPD_SAMPLE);
-
- /* must be at least 200 ns, in APB (PCLK) clock cycles */
- value = DIV_ROUND_UP(1000000000, rate);
- value = DIV_ROUND_UP(200, value);
- tegra_pmc_writel(value, SEL_DPD_TIM);
-
- return 0;
-}
-
-static int tegra_io_rail_poll(unsigned long offset, unsigned long mask,
- unsigned long val, unsigned long timeout)
-{
- unsigned long value;
-
- timeout = jiffies + msecs_to_jiffies(timeout);
-
- while (time_after(timeout, jiffies)) {
- value = tegra_pmc_readl(offset);
- if ((value & mask) == val)
- return 0;
-
- usleep_range(250, 1000);
- }
-
- return -ETIMEDOUT;
-}
-
-static void tegra_io_rail_unprepare(void)
-{
- tegra_pmc_writel(DPD_SAMPLE_DISABLE, DPD_SAMPLE);
-}
-
-int tegra_io_rail_power_on(int id)
-{
- unsigned long request, status, value;
- unsigned int bit, mask;
- int err;
-
- err = tegra_io_rail_prepare(id, &request, &status, &bit);
- if (err < 0)
- return err;
-
- mask = 1 << bit;
-
- value = tegra_pmc_readl(request);
- value |= mask;
- value &= ~IO_DPD_REQ_CODE_MASK;
- value |= IO_DPD_REQ_CODE_OFF;
- tegra_pmc_writel(value, request);
-
- err = tegra_io_rail_poll(status, mask, 0, 250);
- if (err < 0)
- return err;
-
- tegra_io_rail_unprepare();
-
- return 0;
-}
-EXPORT_SYMBOL(tegra_io_rail_power_on);
-
-int tegra_io_rail_power_off(int id)
-{
- unsigned long request, status, value;
- unsigned int bit, mask;
- int err;
-
- err = tegra_io_rail_prepare(id, &request, &status, &bit);
- if (err < 0)
- return err;
-
- mask = 1 << bit;
-
- value = tegra_pmc_readl(request);
- value |= mask;
- value &= ~IO_DPD_REQ_CODE_MASK;
- value |= IO_DPD_REQ_CODE_ON;
- tegra_pmc_writel(value, request);
-
- err = tegra_io_rail_poll(status, mask, mask, 250);
- if (err < 0)
- return err;
-
- tegra_io_rail_unprepare();
-
- return 0;
-}
-EXPORT_SYMBOL(tegra_io_rail_power_off);
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index ab6544576eac..087b66a77c34 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -49,7 +49,6 @@
#include "flowctrl.h"
#include "iomap.h"
#include "irq.h"
-#include "pmc.h"
#include "pm.h"
#include "reset.h"
#include "sleep.h"
@@ -75,14 +74,12 @@ static void __init tegra_init_early(void)
of_register_trusted_foundations();
tegra_init_fuse();
tegra_cpu_reset_handler_init();
- tegra_powergate_init();
tegra_hotplug_init();
tegra_flowctrl_init();
}

static void __init tegra_dt_init_irq(void)
{
- tegra_pmc_init_irq();
tegra_init_irq();
irqchip_init();
tegra_legacy_irq_syscore_init();
@@ -94,8 +91,6 @@ static void __init tegra_dt_init(void)
struct soc_device *soc_dev;
struct device *parent = NULL;

- tegra_pmc_init();
-
tegra_clocks_apply_init_table();

soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
@@ -145,7 +140,6 @@ static void __init tegra_dt_init_late(void)

tegra_init_suspend();
tegra_cpuidle_init();
- tegra_powergate_debugfs_init();

for (i = 0; i < ARRAY_SIZE(board_init_funcs); i++) {
if (of_machine_is_compatible(board_init_funcs[i].machine)) {
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index d7a0b9dfd7ad..12b874b01dfb 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_POWER_SUPPLY) += supply/
obj-$(CONFIG_POWER_RESET) += reset/
obj-$(CONFIG_POWER_AVS) += avs/

+obj-$(CONFIG_ARCH_TEGRA) += tegra-pmc.o
diff --git a/drivers/power/tegra-pmc.c b/drivers/power/tegra-pmc.c
new file mode 100644
index 000000000000..fa587028dc3c
--- /dev/null
+++ b/drivers/power/tegra-pmc.c
@@ -0,0 +1,948 @@
+/*
+ * drivers/soc/tegra/pmc.c
+ *
+ * Copyright (c) 2010 Google, Inc
+ *
+ * Author:
+ * Colin Cross <ccross-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/clk/tegra.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/reset.h>
+#include <linux/seq_file.h>
+#include <linux/spinlock.h>
+#include <linux/tegra-powergate.h>
+#include <linux/tegra-soc.h>
+
+#define PMC_CNTRL 0x0
+#define PMC_CNTRL_SYSCLK_POLARITY (1 << 10) /* sys clk polarity */
+#define PMC_CNTRL_SYSCLK_OE (1 << 11) /* system clock enable */
+#define PMC_CNTRL_SIDE_EFFECT_LP0 (1 << 14) /* LP0 when CPU pwr gated */
+#define PMC_CNTRL_CPU_PWRREQ_POLARITY (1 << 15) /* CPU pwr req polarity */
+#define PMC_CNTRL_CPU_PWRREQ_OE (1 << 16) /* CPU pwr req enable */
+#define PMC_CNTRL_INTR_POLARITY (1 << 17) /* inverts INTR polarity */
+
+#define DPD_SAMPLE 0x020
+#define DPD_SAMPLE_ENABLE (1 << 0)
+#define DPD_SAMPLE_DISABLE (0 << 0)
+
+#define PWRGATE_TOGGLE 0x30
+#define PWRGATE_TOGGLE_START (1 << 8)
+
+#define REMOVE_CLAMPING 0x34
+
+#define PWRGATE_STATUS 0x38
+
+#define PMC_SCRATCH0 0x50
+#define PMC_SCRATCH0_MODE_RECOVERY (1 << 31)
+#define PMC_SCRATCH0_MODE_BOOTLOADER (1 << 30)
+#define PMC_SCRATCH0_MODE_RCM (1 << 1)
+#define PMC_SCRATCH0_MODE_MASK (PMC_SCRATCH0_MODE_RECOVERY | \
+ PMC_SCRATCH0_MODE_BOOTLOADER | \
+ PMC_SCRATCH0_MODE_RCM)
+
+#define PMC_CPUPWRGOOD_TIMER 0xc8
+#define PMC_CPUPWROFF_TIMER 0xcc
+
+#define PMC_SCRATCH41 0x140
+
+#define IO_DPD_REQ 0x1b8
+#define IO_DPD_REQ_CODE_IDLE (0 << 30)
+#define IO_DPD_REQ_CODE_OFF (1 << 30)
+#define IO_DPD_REQ_CODE_ON (2 << 30)
+#define IO_DPD_REQ_CODE_MASK (3 << 30)
+
+#define IO_DPD_STATUS 0x1bc
+#define IO_DPD2_REQ 0x1c0
+#define IO_DPD2_STATUS 0x1c4
+#define SEL_DPD_TIM 0x1c8
+
+#define GPU_RG_CNTRL 0x2d4
+
+struct tegra_pmc_soc {
+ unsigned int num_powergates;
+ const char *const *powergates;
+ unsigned int num_cpu_powergates;
+ const u8 *cpu_powergates;
+};
+
+/**
+ * struct tegra_pmc - NVIDIA Tegra PMC
+ * @base: pointer to I/O remapped register region
+ * @clk: pointer to pclk clock
+ * @rate: currently configured rate of pclk
+ * @suspend_mode: lowest suspend mode available
+ * @cpu_good_time: CPU power good time (in microseconds)
+ * @cpu_off_time: CPU power off time (in microsecends)
+ * @core_osc_time: core power good OSC time (in microseconds)
+ * @core_pmu_time: core power good PMU time (in microseconds)
+ * @core_off_time: core power off time (in microseconds)
+ * @corereq_high: core power request is active-high
+ * @sysclkreq_high: system clock request is active-high
+ * @combined_req: combined power request for CPU & core
+ * @cpu_pwr_good_en: CPU power good signal is enabled
+ * @lp0_vec_phys: physical base address of the LP0 warm boot code
+ * @lp0_vec_size: size of the LP0 warm boot code
+ * @powergates_lock: mutex for power gate register access
+ */
+struct tegra_pmc {
+ void __iomem *base;
+ struct clk *clk;
+
+ const struct tegra_pmc_soc *soc;
+
+ unsigned long rate;
+
+ enum tegra_suspend_mode suspend_mode;
+ u32 cpu_good_time;
+ u32 cpu_off_time;
+ u32 core_osc_time;
+ u32 core_pmu_time;
+ u32 core_off_time;
+ bool corereq_high;
+ bool sysclkreq_high;
+ bool combined_req;
+ bool cpu_pwr_good_en;
+ u32 lp0_vec_phys;
+ u32 lp0_vec_size;
+
+ struct mutex powergates_lock;
+};
+
+static struct tegra_pmc *pmc = &(struct tegra_pmc) {
+ .base = NULL,
+ .suspend_mode = TEGRA_SUSPEND_NONE,
+};
+
+static u32 tegra_pmc_readl(unsigned long offset)
+{
+ return readl(pmc->base + offset);
+}
+
+static void tegra_pmc_writel(u32 value, unsigned long offset)
+{
+ writel(value, pmc->base + offset);
+}
+
+/**
+ * tegra_powergate_set() - set the state of a partition
+ * @id: partition ID
+ * @new_state: new state of the partition
+ */
+static int tegra_powergate_set(int id, bool new_state)
+{
+ bool status;
+
+ mutex_lock(&pmc->powergates_lock);
+
+ status = tegra_pmc_readl(PWRGATE_STATUS) & (1 << id);
+
+ if (status == new_state) {
+ mutex_unlock(&pmc->powergates_lock);
+ return 0;
+ }
+
+ tegra_pmc_writel(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);
+
+ mutex_unlock(&pmc->powergates_lock);
+
+ return 0;
+}
+
+/**
+ * tegra_powergate_power_on() - power on partition
+ * @id: partition ID
+ */
+int tegra_powergate_power_on(int id)
+{
+ if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
+ return -EINVAL;
+
+ return tegra_powergate_set(id, true);
+}
+
+/**
+ * tegra_powergate_power_off() - power off partition
+ * @id: partition ID
+ */
+int tegra_powergate_power_off(int id)
+{
+ if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
+ return -EINVAL;
+
+ return tegra_powergate_set(id, false);
+}
+EXPORT_SYMBOL(tegra_powergate_power_off);
+
+/**
+ * tegra_powergate_is_powered() - check if partition is powered
+ * @id: partition ID
+ */
+int tegra_powergate_is_powered(int id)
+{
+ u32 status;
+
+ if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
+ return -EINVAL;
+
+ status = tegra_pmc_readl(PWRGATE_STATUS) & (1 << id);
+ return !!status;
+}
+
+/**
+ * tegra_powergate_remove_clamping() - remove power clamps for partition
+ * @id: partition ID
+ */
+int tegra_powergate_remove_clamping(int id)
+{
+ u32 mask;
+
+ if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
+ return -EINVAL;
+
+ /*
+ * The Tegra124 GPU has a separate register (with different semantics)
+ * to remove clamps.
+ */
+ if (tegra_chip_id == TEGRA124) {
+ if (id == TEGRA_POWERGATE_3D) {
+ tegra_pmc_writel(0, GPU_RG_CNTRL);
+ return 0;
+ }
+ }
+
+ /*
+ * Tegra 2 has a bug where PCIE and VDE clamping masks are
+ * swapped relatively to the partition ids
+ */
+ if (id == TEGRA_POWERGATE_VDEC)
+ mask = (1 << TEGRA_POWERGATE_PCIE);
+ else if (id == TEGRA_POWERGATE_PCIE)
+ mask = (1 << TEGRA_POWERGATE_VDEC);
+ else
+ mask = (1 << id);
+
+ tegra_pmc_writel(mask, REMOVE_CLAMPING);
+
+ return 0;
+}
+EXPORT_SYMBOL(tegra_powergate_remove_clamping);
+
+/**
+ * tegra_powergate_sequence_power_up() - power up partition
+ * @id: partition ID
+ * @clk: clock for partition
+ * @rst: reset for partition
+ *
+ * Must be called with clk disabled, and returns with clk enabled.
+ */
+int tegra_powergate_sequence_power_up(int id, struct clk *clk,
+ struct reset_control *rst)
+{
+ int ret;
+
+ reset_control_assert(rst);
+
+ ret = tegra_powergate_power_on(id);
+ if (ret)
+ goto err_power;
+
+ ret = clk_prepare_enable(clk);
+ if (ret)
+ goto err_clk;
+
+ usleep_range(10, 20);
+
+ ret = tegra_powergate_remove_clamping(id);
+ if (ret)
+ goto err_clamp;
+
+ usleep_range(10, 20);
+ reset_control_deassert(rst);
+
+ return 0;
+
+err_clamp:
+ clk_disable_unprepare(clk);
+err_clk:
+ tegra_powergate_power_off(id);
+err_power:
+ return ret;
+}
+EXPORT_SYMBOL(tegra_powergate_sequence_power_up);
+
+/**
+ * tegra_get_cpu_powergate_id() - convert from CPU ID to partition ID
+ * @cpuid: CPU partition ID
+ *
+ * Returns the partition ID corresponding to the CPU partition ID or a
+ * negative error code on failure.
+ */
+static int tegra_get_cpu_powergate_id(int cpuid)
+{
+ if (pmc->soc && cpuid > 0 && cpuid < pmc->soc->num_cpu_powergates)
+ return pmc->soc->cpu_powergates[cpuid];
+
+ return -EINVAL;
+}
+
+/**
+ * tegra_pmc_cpu_is_powered() - check if CPU partition is powered
+ * @cpuid: CPU partition ID
+ */
+bool tegra_pmc_cpu_is_powered(int cpuid)
+{
+ int id;
+
+ id = tegra_get_cpu_powergate_id(cpuid);
+ if (id < 0)
+ return false;
+
+ return tegra_powergate_is_powered(id);
+}
+
+/**
+ * tegra_pmc_cpu_power_on() - power on CPU partition
+ * @cpuid: CPU partition ID
+ */
+int tegra_pmc_cpu_power_on(int cpuid)
+{
+ int id;
+
+ id = tegra_get_cpu_powergate_id(cpuid);
+ if (id < 0)
+ return id;
+
+ return tegra_powergate_set(id, true);
+}
+
+/**
+ * tegra_pmc_cpu_remove_clamping() - remove power clamps for CPU partition
+ * @cpuid: CPU partition ID
+ */
+int tegra_pmc_cpu_remove_clamping(int cpuid)
+{
+ int id;
+
+ id = tegra_get_cpu_powergate_id(cpuid);
+ if (id < 0)
+ return id;
+
+ return tegra_powergate_remove_clamping(id);
+}
+
+/**
+ * tegra_pmc_restart() - reboot the system
+ * @mode: which mode to reboot in
+ * @cmd: reboot command
+ */
+void tegra_pmc_restart(enum reboot_mode mode, const char *cmd)
+{
+ u32 value;
+
+ value = tegra_pmc_readl(PMC_SCRATCH0);
+ value &= ~PMC_SCRATCH0_MODE_MASK;
+
+ if (cmd) {
+ if (strcmp(cmd, "recovery") == 0)
+ value |= PMC_SCRATCH0_MODE_RECOVERY;
+
+ if (strcmp(cmd, "bootloader") == 0)
+ value |= PMC_SCRATCH0_MODE_BOOTLOADER;
+
+ if (strcmp(cmd, "forced-recovery") == 0)
+ value |= PMC_SCRATCH0_MODE_RCM;
+ }
+
+ tegra_pmc_writel(value, PMC_SCRATCH0);
+
+ value = tegra_pmc_readl(0);
+ value |= 0x10;
+ tegra_pmc_writel(value, 0);
+}
+
+static int powergate_show(struct seq_file *s, void *data)
+{
+ unsigned int i;
+
+ seq_printf(s, " powergate powered\n");
+ seq_printf(s, "------------------\n");
+
+ for (i = 0; i < pmc->soc->num_powergates; i++) {
+ if (!pmc->soc->powergates[i])
+ continue;
+
+ seq_printf(s, " %9s %7s\n", pmc->soc->powergates[i],
+ tegra_powergate_is_powered(i) ? "yes" : "no");
+ }
+
+ return 0;
+}
+
+static int powergate_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, powergate_show, inode->i_private);
+}
+
+static const struct file_operations powergate_fops = {
+ .open = powergate_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int tegra_powergate_debugfs_init(void)
+{
+ struct dentry *d;
+
+ d = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
+ &powergate_fops);
+ if (!d)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int tegra_io_rail_prepare(int id, unsigned long *request,
+ unsigned long *status, unsigned int *bit)
+{
+ unsigned long rate, value;
+ struct clk *clk;
+
+ *bit = id % 32;
+
+ /*
+ * There are two sets of 30 bits to select IO rails, but bits 30 and
+ * 31 are control bits rather than IO rail selection bits.
+ */
+ if (id > 63 || *bit == 30 || *bit == 31)
+ return -EINVAL;
+
+ if (id < 32) {
+ *status = IO_DPD_STATUS;
+ *request = IO_DPD_REQ;
+ } else {
+ *status = IO_DPD2_STATUS;
+ *request = IO_DPD2_REQ;
+ }
+
+ clk = clk_get_sys(NULL, "pclk");
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ rate = clk_get_rate(clk);
+ clk_put(clk);
+
+ tegra_pmc_writel(DPD_SAMPLE_ENABLE, DPD_SAMPLE);
+
+ /* must be at least 200 ns, in APB (PCLK) clock cycles */
+ value = DIV_ROUND_UP(1000000000, rate);
+ value = DIV_ROUND_UP(200, value);
+ tegra_pmc_writel(value, SEL_DPD_TIM);
+
+ return 0;
+}
+
+static int tegra_io_rail_poll(unsigned long offset, unsigned long mask,
+ unsigned long val, unsigned long timeout)
+{
+ unsigned long value;
+
+ timeout = jiffies + msecs_to_jiffies(timeout);
+
+ while (time_after(timeout, jiffies)) {
+ value = tegra_pmc_readl(offset);
+ if ((value & mask) == val)
+ return 0;
+
+ usleep_range(250, 1000);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static void tegra_io_rail_unprepare(void)
+{
+ tegra_pmc_writel(DPD_SAMPLE_DISABLE, DPD_SAMPLE);
+}
+
+int tegra_io_rail_power_on(int id)
+{
+ unsigned long request, status, value;
+ unsigned int bit, mask;
+ int err;
+
+ err = tegra_io_rail_prepare(id, &request, &status, &bit);
+ if (err < 0)
+ return err;
+
+ mask = 1 << bit;
+
+ value = tegra_pmc_readl(request);
+ value |= mask;
+ value &= ~IO_DPD_REQ_CODE_MASK;
+ value |= IO_DPD_REQ_CODE_OFF;
+ tegra_pmc_writel(value, request);
+
+ err = tegra_io_rail_poll(status, mask, 0, 250);
+ if (err < 0)
+ return err;
+
+ tegra_io_rail_unprepare();
+
+ return 0;
+}
+EXPORT_SYMBOL(tegra_io_rail_power_on);
+
+int tegra_io_rail_power_off(int id)
+{
+ unsigned long request, status, value;
+ unsigned int bit, mask;
+ int err;
+
+ err = tegra_io_rail_prepare(id, &request, &status, &bit);
+ if (err < 0)
+ return err;
+
+ mask = 1 << bit;
+
+ value = tegra_pmc_readl(request);
+ value |= mask;
+ value &= ~IO_DPD_REQ_CODE_MASK;
+ value |= IO_DPD_REQ_CODE_ON;
+ tegra_pmc_writel(value, request);
+
+ err = tegra_io_rail_poll(status, mask, mask, 250);
+ if (err < 0)
+ return err;
+
+ tegra_io_rail_unprepare();
+
+ return 0;
+}
+EXPORT_SYMBOL(tegra_io_rail_power_off);
+
+enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void)
+{
+ return pmc->suspend_mode;
+}
+
+void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode)
+{
+ if (mode < TEGRA_SUSPEND_NONE || mode >= TEGRA_MAX_SUSPEND_MODE)
+ return;
+
+ pmc->suspend_mode = mode;
+}
+
+void tegra_pmc_enter_suspend_mode(enum tegra_suspend_mode mode)
+{
+ unsigned long long rate = 0;
+ u32 value;
+
+ switch (mode) {
+ case TEGRA_SUSPEND_LP1:
+ rate = 32768;
+ break;
+
+ case TEGRA_SUSPEND_LP2:
+ rate = clk_get_rate(pmc->clk);
+ break;
+
+ default:
+ break;
+ }
+
+ if (WARN_ON_ONCE(rate == 0))
+ rate = 100000000;
+
+ if (rate != pmc->rate) {
+ u64 ticks;
+
+ ticks = pmc->cpu_good_time * rate + USEC_PER_SEC - 1;
+ do_div(ticks, USEC_PER_SEC);
+ tegra_pmc_writel(ticks, PMC_CPUPWRGOOD_TIMER);
+
+ ticks = pmc->cpu_off_time * rate + USEC_PER_SEC - 1;
+ do_div(ticks, USEC_PER_SEC);
+ tegra_pmc_writel(ticks, PMC_CPUPWROFF_TIMER);
+
+ wmb();
+
+ pmc->rate = rate;
+ }
+
+ value = tegra_pmc_readl(PMC_CNTRL);
+ value &= ~PMC_CNTRL_SIDE_EFFECT_LP0;
+ value |= PMC_CNTRL_CPU_PWRREQ_OE;
+ tegra_pmc_writel(value, PMC_CNTRL);
+}
+
+static int tegra_pmc_parse_dt(struct tegra_pmc *pmc, struct device_node *np)
+{
+ u32 value, values[2];
+
+ if (of_property_read_u32(np, "nvidia,suspend-mode", &value)) {
+ } else {
+ switch (value) {
+ case 0:
+ pmc->suspend_mode = TEGRA_SUSPEND_LP0;
+ break;
+
+ case 1:
+ pmc->suspend_mode = TEGRA_SUSPEND_LP1;
+ break;
+
+ case 2:
+ pmc->suspend_mode = TEGRA_SUSPEND_LP2;
+ break;
+
+ default:
+ pmc->suspend_mode = TEGRA_SUSPEND_NONE;
+ break;
+ }
+ }
+
+ pmc->suspend_mode = tegra_pm_validate_suspend_mode(pmc->suspend_mode);
+
+ if (of_property_read_u32(np, "nvidia,cpu-pwr-good-time", &value))
+ pmc->suspend_mode = TEGRA_SUSPEND_NONE;
+
+ pmc->cpu_good_time = value;
+
+ if (of_property_read_u32(np, "nvidia,cpu-pwr-off-time", &value))
+ pmc->suspend_mode = TEGRA_SUSPEND_NONE;
+
+ pmc->cpu_off_time = value;
+
+ if (of_property_read_u32_array(np, "nvidia,core-pwr-good-time",
+ values, ARRAY_SIZE(values)))
+ pmc->suspend_mode = TEGRA_SUSPEND_NONE;
+
+ pmc->core_osc_time = values[0];
+ pmc->core_pmu_time = values[1];
+
+ if (of_property_read_u32(np, "nvidia,core-pwr-off-time", &value))
+ pmc->suspend_mode = TEGRA_SUSPEND_NONE;
+
+ pmc->core_off_time = value;
+
+ pmc->corereq_high = of_property_read_bool(np,
+ "nvidia,core-power-req-active-high");
+
+ pmc->sysclkreq_high = of_property_read_bool(np,
+ "nvidia,sys-clock-req-active-high");
+
+ pmc->combined_req = of_property_read_bool(np,
+ "nvidia,combined-power-req");
+
+ pmc->cpu_pwr_good_en = of_property_read_bool(np,
+ "nvidia,cpu-pwr-good-en");
+
+ if (of_property_read_u32_array(np, "nvidia,lp0-vec", values,
+ ARRAY_SIZE(values)))
+ if (pmc->suspend_mode == TEGRA_SUSPEND_LP0)
+ pmc->suspend_mode = TEGRA_SUSPEND_LP1;
+
+ pmc->lp0_vec_phys = values[0];
+ pmc->lp0_vec_size = values[1];
+
+ return 0;
+}
+
+static void tegra_pmc_init(struct tegra_pmc *pmc)
+{
+ u32 value;
+
+ /* Always enable CPU power request */
+ value = tegra_pmc_readl(PMC_CNTRL);
+ value |= PMC_CNTRL_CPU_PWRREQ_OE;
+ tegra_pmc_writel(value, PMC_CNTRL);
+
+ value = tegra_pmc_readl(PMC_CNTRL);
+
+ if (pmc->sysclkreq_high)
+ value &= ~PMC_CNTRL_SYSCLK_POLARITY;
+ else
+ value |= PMC_CNTRL_SYSCLK_POLARITY;
+
+ /* configure the output polarity while the request is tristated */
+ tegra_pmc_writel(value, PMC_CNTRL);
+
+ /* now enable the request */
+ value = tegra_pmc_readl(PMC_CNTRL);
+ value |= PMC_CNTRL_SYSCLK_OE;
+ tegra_pmc_writel(value, PMC_CNTRL);
+}
+
+static int tegra_pmc_probe(struct platform_device *pdev)
+{
+ void __iomem *base = pmc->base;
+ struct resource *res;
+ int err;
+
+ err = tegra_pmc_parse_dt(pmc, pdev->dev.of_node);
+ if (err < 0)
+ return err;
+
+ /* take over the memory region from the early initialization */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ pmc->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pmc->base))
+ return PTR_ERR(pmc->base);
+
+ iounmap(base);
+
+ pmc->clk = devm_clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(pmc->clk)) {
+ err = PTR_ERR(pmc->clk);
+ dev_err(&pdev->dev, "failed to get pclk: %d\n", err);
+ return err;
+ }
+
+ tegra_pmc_init(pmc);
+
+ if (IS_ENABLED(CONFIG_DEBUG_FS)) {
+ err = tegra_powergate_debugfs_init();
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra_pmc_suspend(struct device *dev)
+{
+ tegra_pmc_writel(virt_to_phys(tegra_resume), PMC_SCRATCH41);
+
+ return 0;
+}
+
+static int tegra_pmc_resume(struct device *dev)
+{
+ tegra_pmc_writel(0x0, PMC_SCRATCH41);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(tegra_pmc_pm_ops, tegra_pmc_suspend, tegra_pmc_resume);
+
+static const char * const tegra20_powergates[] = {
+ [TEGRA_POWERGATE_CPU] = "cpu",
+ [TEGRA_POWERGATE_3D] = "3d",
+ [TEGRA_POWERGATE_VENC] = "venc",
+ [TEGRA_POWERGATE_VDEC] = "vdec",
+ [TEGRA_POWERGATE_PCIE] = "pcie",
+ [TEGRA_POWERGATE_L2] = "l2",
+ [TEGRA_POWERGATE_MPE] = "mpe",
+};
+
+static const struct tegra_pmc_soc tegra20_pmc_soc = {
+ .num_powergates = ARRAY_SIZE(tegra20_powergates),
+ .powergates = tegra20_powergates,
+ .num_cpu_powergates = 0,
+ .cpu_powergates = NULL,
+};
+
+static const char * const tegra30_powergates[] = {
+ [TEGRA_POWERGATE_CPU] = "cpu0",
+ [TEGRA_POWERGATE_3D] = "3d0",
+ [TEGRA_POWERGATE_VENC] = "venc",
+ [TEGRA_POWERGATE_VDEC] = "vdec",
+ [TEGRA_POWERGATE_PCIE] = "pcie",
+ [TEGRA_POWERGATE_L2] = "l2",
+ [TEGRA_POWERGATE_MPE] = "mpe",
+ [TEGRA_POWERGATE_HEG] = "heg",
+ [TEGRA_POWERGATE_SATA] = "sata",
+ [TEGRA_POWERGATE_CPU1] = "cpu1",
+ [TEGRA_POWERGATE_CPU2] = "cpu2",
+ [TEGRA_POWERGATE_CPU3] = "cpu3",
+ [TEGRA_POWERGATE_CELP] = "celp",
+ [TEGRA_POWERGATE_3D1] = "3d1",
+};
+
+static const u8 tegra30_cpu_powergates[] = {
+ TEGRA_POWERGATE_CPU,
+ TEGRA_POWERGATE_CPU1,
+ TEGRA_POWERGATE_CPU2,
+ TEGRA_POWERGATE_CPU3,
+};
+
+static const struct tegra_pmc_soc tegra30_pmc_soc = {
+ .num_powergates = ARRAY_SIZE(tegra20_powergates),
+ .powergates = tegra30_powergates,
+ .num_cpu_powergates = ARRAY_SIZE(tegra30_cpu_powergates),
+ .cpu_powergates = tegra30_cpu_powergates,
+};
+
+static const char * const tegra114_powergates[] = {
+ [TEGRA_POWERGATE_CPU] = "crail",
+ [TEGRA_POWERGATE_3D] = "3d",
+ [TEGRA_POWERGATE_VENC] = "venc",
+ [TEGRA_POWERGATE_VDEC] = "vdec",
+ [TEGRA_POWERGATE_MPE] = "mpe",
+ [TEGRA_POWERGATE_HEG] = "heg",
+ [TEGRA_POWERGATE_CPU1] = "cpu1",
+ [TEGRA_POWERGATE_CPU2] = "cpu2",
+ [TEGRA_POWERGATE_CPU3] = "cpu3",
+ [TEGRA_POWERGATE_CELP] = "celp",
+ [TEGRA_POWERGATE_CPU0] = "cpu0",
+ [TEGRA_POWERGATE_C0NC] = "c0nc",
+ [TEGRA_POWERGATE_C1NC] = "c1nc",
+ [TEGRA_POWERGATE_DIS] = "dis",
+ [TEGRA_POWERGATE_DISB] = "disb",
+ [TEGRA_POWERGATE_XUSBA] = "xusba",
+ [TEGRA_POWERGATE_XUSBB] = "xusbb",
+ [TEGRA_POWERGATE_XUSBC] = "xusbc",
+};
+
+static const u8 tegra114_cpu_powergates[] = {
+ TEGRA_POWERGATE_CPU0,
+ TEGRA_POWERGATE_CPU1,
+ TEGRA_POWERGATE_CPU2,
+ TEGRA_POWERGATE_CPU3,
+};
+
+static const struct tegra_pmc_soc tegra114_pmc_soc = {
+ .num_powergates = ARRAY_SIZE(tegra114_powergates),
+ .powergates = tegra114_powergates,
+ .num_cpu_powergates = ARRAY_SIZE(tegra114_cpu_powergates),
+ .cpu_powergates = tegra114_cpu_powergates,
+};
+
+static const char * const tegra124_powergates[] = {
+ [TEGRA_POWERGATE_CPU] = "crail",
+ [TEGRA_POWERGATE_3D] = "3d",
+ [TEGRA_POWERGATE_VENC] = "venc",
+ [TEGRA_POWERGATE_PCIE] = "pcie",
+ [TEGRA_POWERGATE_VDEC] = "vdec",
+ [TEGRA_POWERGATE_L2] = "l2",
+ [TEGRA_POWERGATE_MPE] = "mpe",
+ [TEGRA_POWERGATE_HEG] = "heg",
+ [TEGRA_POWERGATE_SATA] = "sata",
+ [TEGRA_POWERGATE_CPU1] = "cpu1",
+ [TEGRA_POWERGATE_CPU2] = "cpu2",
+ [TEGRA_POWERGATE_CPU3] = "cpu3",
+ [TEGRA_POWERGATE_CELP] = "celp",
+ [TEGRA_POWERGATE_CPU0] = "cpu0",
+ [TEGRA_POWERGATE_C0NC] = "c0nc",
+ [TEGRA_POWERGATE_C1NC] = "c1nc",
+ [TEGRA_POWERGATE_SOR] = "sor",
+ [TEGRA_POWERGATE_DIS] = "dis",
+ [TEGRA_POWERGATE_DISB] = "disb",
+ [TEGRA_POWERGATE_XUSBA] = "xusba",
+ [TEGRA_POWERGATE_XUSBB] = "xusbb",
+ [TEGRA_POWERGATE_XUSBC] = "xusbc",
+ [TEGRA_POWERGATE_VIC] = "vic",
+ [TEGRA_POWERGATE_IRAM] = "iram",
+};
+
+static const u8 tegra124_cpu_powergates[] = {
+ TEGRA_POWERGATE_CPU0,
+ TEGRA_POWERGATE_CPU1,
+ TEGRA_POWERGATE_CPU2,
+ TEGRA_POWERGATE_CPU3,
+};
+
+static const struct tegra_pmc_soc tegra124_pmc_soc = {
+ .num_powergates = ARRAY_SIZE(tegra124_powergates),
+ .powergates = tegra124_powergates,
+ .num_cpu_powergates = ARRAY_SIZE(tegra124_cpu_powergates),
+ .cpu_powergates = tegra124_cpu_powergates,
+};
+
+static const struct of_device_id tegra_pmc_match[] = {
+ { .compatible = "nvidia,tegra124-pmc", .data = &tegra124_pmc_soc },
+ { .compatible = "nvidia,tegra114-pmc", .data = &tegra114_pmc_soc },
+ { .compatible = "nvidia,tegra30-pmc", .data = &tegra30_pmc_soc },
+ { .compatible = "nvidia,tegra20-pmc", .data = &tegra20_pmc_soc },
+ { }
+};
+
+static struct platform_driver tegra_pmc_driver = {
+ .driver = {
+ .name = "tegra-pmc",
+ .suppress_bind_attrs = true,
+ .of_match_table = tegra_pmc_match,
+ .pm = &tegra_pmc_pm_ops,
+ },
+ .probe = tegra_pmc_probe,
+};
+module_platform_driver(tegra_pmc_driver);
+
+/*
+ * Early initialization to allow access to registers in the very early boot
+ * process.
+ */
+static int __init tegra_pmc_early_init(void)
+{
+ const struct of_device_id *match;
+ struct device_node *np;
+ struct resource regs;
+ bool invert;
+ u32 value;
+
+ np = of_find_matching_node_and_match(NULL, tegra_pmc_match, &match);
+ if (!np) {
+ pr_warn("PMC device node not found, disabling powergating\n");
+
+ regs.start = 0x7000e400;
+ regs.end = 0x7000e7ff;
+ regs.flags = IORESOURCE_MEM;
+
+ pr_warn("Using memory region %pR\n", &regs);
+ } else {
+ pmc->soc = match->data;
+ }
+
+ if (of_address_to_resource(np, 0, &regs) < 0) {
+ pr_err("failed to get PMC registers\n");
+ return -ENXIO;
+ }
+
+ pmc->base = ioremap_nocache(regs.start, resource_size(&regs));
+ if (!pmc->base) {
+ pr_err("failed to map PMC registers\n");
+ return -ENXIO;
+ }
+
+ mutex_init(&pmc->powergates_lock);
+
+ invert = of_property_read_bool(np, "nvidia,invert-interrupt");
+
+ value = tegra_pmc_readl(PMC_CNTRL);
+
+ if (invert)
+ value |= PMC_CNTRL_INTR_POLARITY;
+ else
+ value &= ~PMC_CNTRL_INTR_POLARITY;
+
+ tegra_pmc_writel(value, PMC_CNTRL);
+
+ return 0;
+}
+early_initcall(tegra_pmc_early_init);
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index fcf65ecbecca..c9013eaa167b 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -27,6 +27,8 @@

#ifndef __ASSEMBLY__

+#include <linux/reboot.h>
+
enum tegra_revision {
TEGRA_REVISION_UNKNOWN = 0,
TEGRA_REVISION_A01,
@@ -59,6 +61,50 @@ int tegra_fuse_readl(u32 offset, u32 *val);
extern int tegra_chip_id;
extern struct tegra_sku_info tegra_sku_info;

+/*
+ * PMC
+ */
+enum tegra_suspend_mode {
+ TEGRA_SUSPEND_NONE = 0,
+ TEGRA_SUSPEND_LP2, /* CPU voltage off */
+ TEGRA_SUSPEND_LP1, /* CPU voltage off, DRAM self-refresh */
+ TEGRA_SUSPEND_LP0, /* CPU + core voltage off, DRAM self-refresh */
+ TEGRA_MAX_SUSPEND_MODE,
+};
+
+#ifdef CONFIG_PM_SLEEP
+enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void);
+void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode);
+void tegra_pmc_enter_suspend_mode(enum tegra_suspend_mode mode);
+
+bool tegra_pmc_cpu_is_powered(int cpuid);
+int tegra_pmc_cpu_power_on(int cpuid);
+int tegra_pmc_cpu_remove_clamping(int cpuid);
+
+void tegra_pmc_restart(enum reboot_mode mode, const char *cmd);
+#endif
+
+/*
+ * PM
+ */
+#ifdef CONFIG_PM_SLEEP
+enum tegra_suspend_mode
+tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode);
+
+/* low-level resume entry point */
+void tegra_resume(void);
+#else
+static inline enum tegra_suspend_mode
+tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode)
+{
+ return TEGRA_SUSPEND_NONE;
+}
+
+static inline void tegra_resume(void)
+{
+}
+#endif
+
#endif /* __ASSEMBLY__ */

#endif /* __LINUX_TEGRA_SOC_H_ */
--
2.0.1