Merge tag 'tegra-for-3.17-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/cleanup

Merge "ARM: tegra: core code changes for 3.17" from Thierry Reding:

Some of the code that's currently called from the Tegra machine setup
code is moved to regular initcalls. To catch dependency violations, the
various code paths now WARN if they're called to early. Not all of the
potential candidates are converted yet, but those that were have been
verified to work across all supported Tegra generations.

A new function, soc_is_tegra(), is also provided to make sure that the
initcalls can abort early if they aren't run on Tegra, which can happen
for multi-platform builds.

Finally this also moves out the PMC driver to drivers/soc/tegra so that
it can be shared with 64-bit ARM.

This is based on the for-3.17/fuse-move branch. The split is somewhat
arbitrary but allows the dependents of the for-3.17/fuse-move to pull
in as little code as necessary.

* tag 'tegra-for-3.17-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  ARM: tegra: Convert PMC to a driver
  soc/tegra: fuse: Set up in early initcall
  ARM: tegra: Always lock the CPU reset vector
  ARM: tegra: Setup CPU hotplug in a pure initcall
  soc/tegra: Implement runtime check for Tegra SoCs

Signed-off-by: Olof Johansson <olof@lixom.net>

25 files changed, 1132 insertions, 1038 deletions

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/hotplug.c b/arch/arm/mach-tegra/hotplug.c
index d60339c996cb..6fc71f1534b0 100644
--- a/arch/arm/mach-tegra/hotplug.c
+++ b/arch/arm/mach-tegra/hotplug.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/smp.h>
 
+#include <soc/tegra/common.h>
 #include <soc/tegra/fuse.h>
 
 #include <asm/smp_plat.h>
@@ -38,6 +39,11 @@ int tegra_cpu_kill(unsigned cpu)
  */
 void __ref tegra_cpu_die(unsigned int cpu)
 {
+	if (!tegra_hotplug_shutdown) {
+		WARN(1, "hotplug is not yet initialized\n");
+		return;
+	}
+
 	/* Clean L1 data cache */
 	tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS);
 
@@ -48,10 +54,13 @@ void __ref tegra_cpu_die(unsigned int cpu)
 	BUG();
 }
 
-void __init tegra_hotplug_init(void)
+static int __init tegra_hotplug_init(void)
 {
 	if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))
-		return;
+		return 0;
+
+	if (!soc_is_tegra())
+		return 0;
 
 	if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_get_chip_id() == TEGRA20)
 		tegra_hotplug_shutdown = tegra20_hotplug_shutdown;
@@ -61,4 +70,7 @@ void __init tegra_hotplug_init(void)
 		tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
 	if (IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC) && tegra_get_chip_id() == TEGRA124)
 		tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
+
+	return 0;
 }
+pure_initcall(tegra_hotplug_init);
diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c
index 0466a145b500..b45086666648 100644
--- a/arch/arm/mach-tegra/platsmp.c
+++ b/arch/arm/mach-tegra/platsmp.c
@@ -22,6 +22,7 @@
 #include <linux/smp.h>
 
 #include <soc/tegra/fuse.h>
+#include <soc/tegra/pmc.h>
 
 #include <asm/cacheflush.h>
 #include <asm/mach-types.h>
@@ -31,7 +32,6 @@
 #include "common.h"
 #include "flowctrl.h"
 #include "iomap.h"
-#include "pmc.h"
 #include "reset.h"
 
 static cpumask_t tegra_cpu_init_mask;
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index 94db3b6664df..b0f48a3946fa 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -28,6 +28,8 @@
 #include <linux/suspend.h>
 
 #include <soc/tegra/fuse.h>
+#include <soc/tegra/pm.h>
+#include <soc/tegra/pmc.h>
 
 #include <asm/cacheflush.h>
 #include <asm/idmap.h>
@@ -38,7 +40,6 @@
 
 #include "flowctrl.h"
 #include "iomap.h"
-#include "pmc.h"
 #include "pm.h"
 #include "reset.h"
 #include "sleep.h"
@@ -167,9 +168,29 @@ static int tegra_sleep_cpu(unsigned long v2p)
 	return 0;
 }
 
+static void tegra_pm_set(enum tegra_suspend_mode mode)
+{
+	u32 value;
+
+	switch (tegra_get_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();
@@ -268,8 +289,6 @@ 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);
@@ -281,8 +300,6 @@ 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);
@@ -307,7 +324,7 @@ 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();
 
@@ -355,7 +372,6 @@ 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 69df18090c8b..000000000000
--- a/arch/arm/mach-tegra/pmc.c
+++ /dev/null
@@ -1,414 +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/clk.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-
-#include <soc/tegra/fuse.h>
-#include <soc/tegra/powergate.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 void __iomem *tegra_pmc_base;
-static bool tegra_pmc_invert_interrupt;
-static struct clk *tegra_pclk;
-
-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 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);
-}
-
-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_get_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 59e19c344298..000000000000
--- a/arch/arm/mach-tegra/pmc.h
+++ /dev/null
@@ -1,49 +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/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
-
-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 0a14b8638437..000000000000
--- a/arch/arm/mach-tegra/powergate.c
+++ /dev/null
@@ -1,516 +0,0 @@
-/*
- * drivers/powergate/tegra-powergate.c
- *
- * Copyright (c) 2010 Google, Inc
- *
- * Author:
- *	Colin Cross <ccross@google.com>
- *
- * 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/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/kernel.h>
-#include <linux/reset.h>
-#include <linux/seq_file.h>
-#include <linux/spinlock.h>
-
-#include <soc/tegra/fuse.h>
-#include <soc/tegra/powergate.h>
-
-#include "iomap.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 void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
-
-static u32 pmc_read(unsigned long reg)
-{
-	return readl(pmc + reg);
-}
-
-static void pmc_write(u32 val, unsigned long reg)
-{
-	writel(val, pmc + reg);
-}
-
-static int tegra_powergate_set(int id, bool new_state)
-{
-	bool status;
-	unsigned long flags;
-
-	spin_lock_irqsave(&tegra_powergate_lock, flags);
-
-	status = pmc_read(PWRGATE_STATUS) & (1 << id);
-
-	if (status == new_state) {
-		spin_unlock_irqrestore(&tegra_powergate_lock, flags);
-		return 0;
-	}
-
-	pmc_write(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 = pmc_read(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_get_chip_id() == TEGRA124) {
-		if (id == TEGRA_POWERGATE_3D) {
-			pmc_write(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);
-
-	pmc_write(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_get_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_get_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);
-
-	pmc_write(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);
-	pmc_write(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 = pmc_read(offset);
-		if ((value & mask) == val)
-			return 0;
-
-		usleep_range(250, 1000);
-	}
-
-	return -ETIMEDOUT;
-}
-
-static void tegra_io_rail_unprepare(void)
-{
-	pmc_write(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 = pmc_read(request);
-	value |= mask;
-	value &= ~IO_DPD_REQ_CODE_MASK;
-	value |= IO_DPD_REQ_CODE_OFF;
-	pmc_write(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 = pmc_read(request);
-	value |= mask;
-	value &= ~IO_DPD_REQ_CODE_MASK;
-	value |= IO_DPD_REQ_CODE_ON;
-	pmc_write(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/reset.c b/arch/arm/mach-tegra/reset.c
index 5377495d41b8..894c5c472184 100644
--- a/arch/arm/mach-tegra/reset.c
+++ b/arch/arm/mach-tegra/reset.c
@@ -54,12 +54,10 @@ static void __init tegra_cpu_reset_handler_set(const u32 reset_address)
 	 * Prevent further modifications to the physical reset vector.
 	 *  NOTE: Has no effect on chips prior to Tegra30.
 	 */
-	if (tegra_get_chip_id() != TEGRA20) {
-		reg = readl(sb_ctrl);
-		reg |= 2;
-		writel(reg, sb_ctrl);
-		wmb();
-	}
+	reg = readl(sb_ctrl);
+	reg |= 2;
+	writel(reg, sb_ctrl);
+	wmb();
 }
 
 static void __init tegra_cpu_reset_handler_enable(void)
diff --git a/arch/arm/mach-tegra/sleep.h b/arch/arm/mach-tegra/sleep.h
index 339fe42cd6fb..92d46ec1361a 100644
--- a/arch/arm/mach-tegra/sleep.h
+++ b/arch/arm/mach-tegra/sleep.h
@@ -130,9 +130,6 @@ void tegra_disable_clean_inv_dcache(u32 flag);
 #ifdef CONFIG_HOTPLUG_CPU
 void tegra20_hotplug_shutdown(void);
 void tegra30_hotplug_shutdown(void);
-void tegra_hotplug_init(void);
-#else
-static inline void tegra_hotplug_init(void) {}
 #endif
 
 void tegra20_cpu_shutdown(int cpu);
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 6ccbc8ca1db5..5ef5173dec83 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -36,6 +36,7 @@
 #include <linux/usb/tegra_usb_phy.h>
 
 #include <soc/tegra/fuse.h>
+#include <soc/tegra/pmc.h>
 
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/mach/arch.h>
@@ -49,7 +50,6 @@
 #include "cpuidle.h"
 #include "iomap.h"
 #include "irq.h"
-#include "pmc.h"
 #include "pm.h"
 #include "reset.h"
 #include "sleep.h"
@@ -73,15 +73,11 @@ u32 tegra_uart_config[3] = {
 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();
 }
 
 static void __init tegra_dt_init_irq(void)
 {
-	tegra_pmc_init_irq();
 	tegra_init_irq();
 	irqchip_init();
 	tegra_legacy_irq_syscore_init();
@@ -93,8 +89,6 @@ 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);
@@ -144,7 +138,6 @@ 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/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c
index 5679ffdb3f8c..5bbacd01094f 100644
--- a/drivers/clk/tegra/clk-tegra30.c
+++ b/drivers/clk/tegra/clk-tegra30.c
@@ -23,7 +23,7 @@
 #include <linux/of_address.h>
 #include <linux/clk/tegra.h>
 
-#include <soc/tegra/powergate.h>
+#include <soc/tegra/pmc.h>
 
 #include <dt-bindings/clock/tegra30-car.h>
 
diff --git a/drivers/gpu/drm/tegra/gr3d.c b/drivers/gpu/drm/tegra/gr3d.c
index 69974851e564..2d07616a7d80 100644
--- a/drivers/gpu/drm/tegra/gr3d.c
+++ b/drivers/gpu/drm/tegra/gr3d.c
@@ -13,7 +13,7 @@
 #include <linux/platform_device.h>
 #include <linux/reset.h>
 
-#include <soc/tegra/powergate.h>
+#include <soc/tegra/pmc.h>
 
 #include "drm.h"
 #include "gem.h"
diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index eafd0b8a71d2..7f8ca5d4718f 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -12,7 +12,7 @@
 #include <linux/platform_device.h>
 #include <linux/reset.h>
 
-#include <soc/tegra/powergate.h>
+#include <soc/tegra/pmc.h>
 
 #include <drm/drm_dp_helper.h>
 
diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index a2f0f88be382..acbfee0d7947 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -45,7 +45,7 @@
 #include <linux/regulator/consumer.h>
 
 #include <soc/tegra/cpuidle.h>
-#include <soc/tegra/powergate.h>
+#include <soc/tegra/pmc.h>
 
 #include <asm/mach/irq.h>
 #include <asm/mach/map.h>
diff --git a/drivers/soc/tegra/Makefile b/drivers/soc/tegra/Makefile
index 236600f91bb3..cdaad9d53a05 100644
--- a/drivers/soc/tegra/Makefile
+++ b/drivers/soc/tegra/Makefile
@@ -1 +1,4 @@
 obj-$(CONFIG_ARCH_TEGRA) += fuse/
+
+obj-$(CONFIG_ARCH_TEGRA) += common.o
+obj-$(CONFIG_ARCH_TEGRA) += pmc.o
diff --git a/drivers/soc/tegra/common.c b/drivers/soc/tegra/common.c
new file mode 100644
index 000000000000..a71cb74f3674
--- /dev/null
+++ b/drivers/soc/tegra/common.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2014 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/of.h>
+
+#include <soc/tegra/common.h>
+
+static const struct of_device_id tegra_machine_match[] = {
+	{ .compatible = "nvidia,tegra20", },
+	{ .compatible = "nvidia,tegra30", },
+	{ .compatible = "nvidia,tegra114", },
+	{ .compatible = "nvidia,tegra124", },
+	{ }
+};
+
+bool soc_is_tegra(void)
+{
+	struct device_node *root;
+
+	root = of_find_node_by_path("/");
+	if (!root)
+		return false;
+
+	return of_match_node(tegra_machine_match, root) != NULL;
+}
diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c
index 03742edcfe83..11a5043959dc 100644
--- a/drivers/soc/tegra/fuse/fuse-tegra.c
+++ b/drivers/soc/tegra/fuse/fuse-tegra.c
@@ -23,6 +23,7 @@
 #include <linux/of_address.h>
 #include <linux/io.h>
 
+#include <soc/tegra/common.h>
 #include <soc/tegra/fuse.h>
 
 #include "fuse.h"
@@ -125,11 +126,14 @@ int tegra_fuse_create_sysfs(struct device *dev, int size,
 	return device_create_bin_file(dev, &fuse_bin_attr);
 }
 
-void __init tegra_init_fuse(void)
+static int __init tegra_init_fuse(void)
 {
 	struct device_node *np;
 	void __iomem *car_base;
 
+	if (!soc_is_tegra())
+		return 0;
+
 	tegra_init_apbmisc();
 
 	np = of_find_matching_node(NULL, car_match);
@@ -139,7 +143,7 @@ void __init tegra_init_fuse(void)
 		iounmap(car_base);
 	} else {
 		pr_err("Could not enable fuse clk. ioremap tegra car failed.\n");
-		return;
+		return -ENXIO;
 	}
 
 	if (tegra_get_chip_id() == TEGRA20)
@@ -153,4 +157,7 @@ void __init tegra_init_fuse(void)
 		tegra_sku_info.core_process_id);
 	pr_debug("Tegra CPU Speedo ID %d, Soc Speedo ID %d\n",
 		tegra_sku_info.cpu_speedo_id, tegra_sku_info.soc_speedo_id);
+
+	return 0;
 }
+early_initcall(tegra_init_fuse);
diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c
index bfc1d54ac4ad..3bf5aba4caaa 100644
--- a/drivers/soc/tegra/fuse/tegra-apbmisc.c
+++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c
@@ -38,9 +38,12 @@ u32 tegra_read_chipid(void)
 
 u8 tegra_get_chip_id(void)
 {
-	u32 id = tegra_read_chipid();
+	if (!apbmisc_base) {
+		WARN(1, "Tegra Chip ID not yet available\n");
+		return 0;
+	}
 
-	return (id >> 8) & 0xff;
+	return (tegra_read_chipid() >> 8) & 0xff;
 }
 
 u32 tegra_read_straps(void)
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
new file mode 100644
index 000000000000..a2c0ceb95f8f
--- /dev/null
+++ b/drivers/soc/tegra/pmc.c
@@ -0,0 +1,957 @@
+/*
+ * drivers/soc/tegra/pmc.c
+ *
+ * Copyright (c) 2010 Google, Inc
+ *
+ * Author:
+ *	Colin Cross <ccross@google.com>
+ *
+ * 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 <soc/tegra/common.h>
+#include <soc/tegra/fuse.h>
+#include <soc/tegra/pmc.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_get_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);
+
+#ifdef CONFIG_SMP
+/**
+ * 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);
+}
+#endif /* CONFIG_SMP */
+
+/**
+ * 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);
+
+#ifdef CONFIG_PM_SLEEP
+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);
+}
+#endif
+
+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(tegra30_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;
+
+	if (!soc_is_tegra())
+		return 0;
+
+	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/soc/tegra/common.h b/include/soc/tegra/common.h
new file mode 100644
index 000000000000..fc13a9a134e9
--- /dev/null
+++ b/include/soc/tegra/common.h
@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) 2014 NVIDIA Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __SOC_TEGRA_COMMON_H__
+#define __SOC_TEGRA_COMMON_H__
+
+bool soc_is_tegra(void);
+
+#endif /* __SOC_TEGRA_COMMON_H__ */
diff --git a/include/soc/tegra/fuse.h b/include/soc/tegra/fuse.h
index 738712d75cfe..8e1249474e84 100644
--- a/include/soc/tegra/fuse.h
+++ b/include/soc/tegra/fuse.h
@@ -56,7 +56,6 @@ struct tegra_sku_info {
 
 u32 tegra_read_straps(void);
 u32 tegra_read_chipid(void);
-void tegra_init_fuse(void);
 int tegra_fuse_readl(unsigned long offset, u32 *value);
 
 extern struct tegra_sku_info tegra_sku_info;
diff --git a/include/soc/tegra/pm.h b/include/soc/tegra/pm.h
new file mode 100644
index 000000000000..30fe2078a547
--- /dev/null
+++ b/include/soc/tegra/pm.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2014 NVIDIA Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __SOC_TEGRA_PM_H__
+#define __SOC_TEGRA_PM_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_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 /* CONFIG_PM_SLEEP */
+
+#endif /* __SOC_TEGRA_PM_H__ */
diff --git a/include/soc/tegra/powergate.h b/include/soc/tegra/pmc.h
index c16912ed1a8d..65a93273e72f 100644
--- a/include/soc/tegra/powergate.h
+++ b/include/soc/tegra/pmc.h
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2010 Google, Inc
+ * Copyright (c) 2014 NVIDIA Corporation
  *
  * Author:
  *	Colin Cross <ccross@google.com>
@@ -15,12 +16,34 @@
  *
  */
 
-#ifndef __SOC_TEGRA_POWERGATE_H__
-#define __SOC_TEGRA_POWERGATE_H__
+#ifndef __SOC_TEGRA_PMC_H__
+#define __SOC_TEGRA_PMC_H__
+
+#include <linux/reboot.h>
+
+#include <soc/tegra/pm.h>
 
 struct clk;
 struct reset_control;
 
+void tegra_pmc_restart(enum reboot_mode mode, const char *cmd);
+
+#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);
+#endif /* CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_SMP
+bool tegra_pmc_cpu_is_powered(int cpuid);
+int tegra_pmc_cpu_power_on(int cpuid);
+int tegra_pmc_cpu_remove_clamping(int cpuid);
+#endif /* CONFIG_SMP */
+
+/*
+ * powergate and I/O rail APIs
+ */
+
 #define TEGRA_POWERGATE_CPU	0
 #define TEGRA_POWERGATE_3D	1
 #define TEGRA_POWERGATE_VENC	2
@@ -129,6 +152,6 @@ static inline int tegra_io_rail_power_off(int id)
 {
 	return -ENOSYS;
 }
-#endif
+#endif /* CONFIG_ARCH_TEGRA */
 
-#endif /* __SOC_TEGRA_POWERGATE_H__ */
+#endif /* __SOC_TEGRA_PMC_H__ */