ARM: tegra: core SoC support development

This branch includes major development on the core Tegra SoC support code in the mach-tegra directory: * SMP support for Tegra114. * Exposes SoC chip ID and revision through standard sysfs files. * System-level suspend/resume for Tegra20/30. At present, this only supports "LP2" mode (CPU power-down), but provides the basis to implement "LP0"/"LP1" (various levels of core/chip power-down) in the hopefully near future. * A minor cleanup of a duplicate include, which was introduced in this branch. This branch is based on the previous cleanup pull request. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJRXvvtAAoJEMzrak5tbycxwdAP/ioto6+ekXniT3/Iqx9CmqG4 kDwS6LKn8Y91ePH6R8i23U98PjLwo/HgRWSTLjfwLMAi3AOEgsJ+bUnCmPAszxkY Ayyv+SLbgYaR817ezACXKH0tJHF1yo07bwk76jXQwo9/d71wg8sLweQwuEA1p/u8 ZlMniF731p7oZCNcoK680eFsurTO850GTfCrBowmOiGcPgpbllTEifwRthzQNhD7 b0Yw55rTqz9gbhgYCN33Va6CzwD9CMaxKN28J6qPJ+j7JCXO5Qp2QCuQ5PxLTbGq g1n65h2p5eXQwJwnf70jGuvF9xjdPO0zNTbQVP/hkrRMpB9VA0Z6zw0s12c1H70l Hs/7Hn7IBzCf5jdn802knc0K0b3Q7MhUjfTU6Gmj2KWJ+SfjMQtfqRdTWKsmPXXU 3MVxlJnqHNCjttWXXkxN0lKSgdi5HN431RwD6P9i0NPIq9RKZutw4jFeNLclVuGa xZMBtdDZ/U2KwL0aITkleacMHcb5/pK1z626//rB2CWRSRtVLGgye14FyEBi1U+I EdA16bu9U6MiwlqT0I849pXFb3l0di0+FTVadE+D3aJGjk/IWond0Fk1VayaSCX0 X8SNUByRPtwhJRQH+oX+HDZXWW6gc2cixpYSoDmgdSXSJLBuLlAD+KPAXi2hvTUf REyjYXwVXVyMY/XTz5fP =1KXE -----END PGP SIGNATURE----- Merge tag 'tegra-for-3.10-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/soc From Stephen Warren <swarren@wwwdotorg.org>: ARM: tegra: core SoC support development This branch includes major development on the core Tegra SoC support code in the mach-tegra directory: * SMP support for Tegra114. * Exposes SoC chip ID and revision through standard sysfs files. * System-level suspend/resume for Tegra20/30. At present, this only supports "LP2" mode (CPU power-down), but provides the basis to implement "LP0"/"LP1" (various levels of core/chip power-down) in the hopefully near future. * A minor cleanup of a duplicate include, which was introduced in this branch. This branch is based on the previous cleanup pull request. * tag 'tegra-for-3.10-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra: ARM: tegra: pm: remove duplicated include from pm.c ARM: tegra: cpuidle: remove redundant parameters for powered-down mode ARM: tegra: pm: add platform suspend support ARM: dt: tegra: add bindings of power management configurations for PMC ARM: tegra: irq: add wake up handling gpio: tegra: add gpio wakeup source handling ARM: tegra: moving the CPU power timer function to PMC driver ARM: tegra: add clock source of PMC to device trees ARM: tegra: add speedo-based process id for Tegra114 ARM: tegra: expose chip ID and revision ARM: tegra: bring up secondary CPU for Tegra114 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-04-09 16:32:20 +02:00 · 2013-04-09 16:32:20 +02:00 · 6cd2f8e7da
commit 6cd2f8e7da
parent 3be1812ea3 38be85de69
33 changed files with 780 additions and 67 deletions
--- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
+++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
@ -1,19 +1,84 @@
 NVIDIA Tegra Power Management Controller (PMC)

-Properties:
+The PMC block interacts with an external Power Management Unit. The PMC
+mostly controls the entry and exit of the system from different sleep
+modes. It provides power-gating controllers for SoC and CPU power-islands.
+
+Required properties:
 - name : Should be pmc
 - compatible : Should contain "nvidia,tegra<chip>-pmc".
 - reg : Offset and length of the register set for the device
+- clocks : Must contain an entry for each entry in clock-names.
+- clock-names : Must include the following entries:
+  "pclk" (The Tegra clock of that name),
+  "clk32k_in" (The 32KHz clock input to Tegra).
+
+Optional properties:
 - nvidia,invert-interrupt : If present, inverts the PMU interrupt signal.
  The PMU is an external Power Management Unit, whose interrupt output
  signal is fed into the PMC. This signal is optionally inverted, and then
  fed into the ARM GIC. The PMC is not involved in the detection or
  handling of this interrupt signal, merely its inversion.
+- nvidia,suspend-mode : The suspend mode that the platform should use.
+  Valid values are 0, 1 and 2:
+  0 (LP0): CPU + Core voltage off and DRAM in self-refresh
+  1 (LP1): CPU voltage off and DRAM in self-refresh
+  2 (LP2): CPU voltage off
+- nvidia,core-power-req-active-high : Boolean, core power request active-high
+- nvidia,sys-clock-req-active-high : Boolean, system clock request active-high
+- nvidia,combined-power-req : Boolean, combined power request for CPU & Core
+- nvidia,cpu-pwr-good-en : Boolean, CPU power good signal (from PMIC to PMC)
+			   is enabled.
+
+Required properties when nvidia,suspend-mode is specified:
+- nvidia,cpu-pwr-good-time : CPU power good time in uS.
+- nvidia,cpu-pwr-off-time : CPU power off time in uS.
+- nvidia,core-pwr-good-time : <Oscillator-stable-time Power-stable-time>
+			      Core power good time in uS.
+- nvidia,core-pwr-off-time : Core power off time in uS.
+
+Required properties when nvidia,suspend-mode=<0>:
+- nvidia,lp0-vec : <start length> Starting address and length of LP0 vector
+  The LP0 vector contains the warm boot code that is executed by AVP when
+  resuming from the LP0 state. The AVP (Audio-Video Processor) is an ARM7
+  processor and always being the first boot processor when chip is power on
+  or resume from deep sleep mode. When the system is resumed from the deep
+  sleep mode, the warm boot code will restore some PLLs, clocks and then
+  bring up CPU0 for resuming the system.

 Example:

+/ SoC dts including file
 pmc@7000f400 {
 	compatible = "nvidia,tegra20-pmc";
 	reg = <0x7000e400 0x400>;
+	clocks = <&tegra_car 110>, <&clk32k_in>;
+	clock-names = "pclk", "clk32k_in";
 	nvidia,invert-interrupt;
+	nvidia,suspend-mode = <1>;
+	nvidia,cpu-pwr-good-time = <2000>;
+	nvidia,cpu-pwr-off-time = <100>;
+	nvidia,core-pwr-good-time = <3845 3845>;
+	nvidia,core-pwr-off-time = <458>;
+	nvidia,core-power-req-active-high;
+	nvidia,sys-clock-req-active-high;
+	nvidia,lp0-vec = <0xbdffd000 0x2000>;
+};
+
+/ Tegra board dts file
+{
+	...
+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+	...
 };
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@ -673,6 +673,7 @@ config ARCH_TEGRA
 	select HAVE_CLK
 	select HAVE_SMP
 	select MIGHT_HAVE_CACHE_L2X0
+	select SOC_BUS
 	select SPARSE_IRQ
 	select USE_OF
 	help
--- a/arch/arm/boot/dts/tegra114-dalmore.dts
+++ b/arch/arm/boot/dts/tegra114-dalmore.dts
@ -18,4 +18,17 @@ serial@70006300 {
 	pmc {
 		nvidia,invert-interrupt;
 	};
+
+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
 };
--- a/arch/arm/boot/dts/tegra114-pluto.dts
+++ b/arch/arm/boot/dts/tegra114-pluto.dts
@ -18,4 +18,17 @@ serial@70006300 {
 	pmc {
 		nvidia,invert-interrupt;
 	};
+
+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
 };
--- a/arch/arm/boot/dts/tegra114.dtsi
+++ b/arch/arm/boot/dts/tegra114.dtsi
@ -101,6 +101,8 @@ rtc {
 	pmc {
 		compatible = "nvidia,tegra114-pmc";
 		reg = <0x7000e400 0x400>;
+		clocks = <&tegra_car 261>, <&clk32k_in>;
+		clock-names = "pclk", "clk32k_in";
 	};

 	iommu {
--- a/arch/arm/boot/dts/tegra20-colibri-512.dtsi
+++ b/arch/arm/boot/dts/tegra20-colibri-512.dtsi
@ -447,6 +447,19 @@ sdhci@c8000600 {
 		cd-gpios = <&gpio 23 1>; /* gpio PC7 */
 	};

+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
 	sound {
 		compatible = "nvidia,tegra-audio-wm9712-colibri_t20",
 			         "nvidia,tegra-audio-wm9712";
--- a/arch/arm/boot/dts/tegra20-harmony.dts
+++ b/arch/arm/boot/dts/tegra20-harmony.dts
@ -451,6 +451,19 @@ sdhci@c8000600 {
 		bus-width = <8>;
 	};

+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
 	kbc {
 		status = "okay";
 		nvidia,debounce-delay-ms = <2>;
--- a/arch/arm/boot/dts/tegra20-paz00.dts
+++ b/arch/arm/boot/dts/tegra20-paz00.dts
@ -447,6 +447,19 @@ sdhci@c8000600 {
 		bus-width = <8>;
 	};

+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";

--- a/arch/arm/boot/dts/tegra20-seaboard.dts
+++ b/arch/arm/boot/dts/tegra20-seaboard.dts
@ -595,6 +595,19 @@ sdhci@c8000600 {
 		bus-width = <8>;
 	};

+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";

--- a/arch/arm/boot/dts/tegra20-tamonten.dtsi
+++ b/arch/arm/boot/dts/tegra20-tamonten.dtsi
@ -471,6 +471,19 @@ sdhci@c8000600 {
 		status = "okay";
 	};

+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
 	regulators {
 		compatible = "simple-bus";

--- a/arch/arm/boot/dts/tegra20-trimslice.dts
+++ b/arch/arm/boot/dts/tegra20-trimslice.dts
@ -330,6 +330,19 @@ sdhci@c8000600 {
 		bus-width = <4>;
 	};

+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
 	poweroff {
 		compatible = "gpio-poweroff";
 		gpios = <&gpio 191 1>; /* gpio PX7, active low */
--- a/arch/arm/boot/dts/tegra20-ventana.dts
+++ b/arch/arm/boot/dts/tegra20-ventana.dts
@ -531,6 +531,19 @@ sdhci@c8000600 {
 		bus-width = <8>;
 	};

+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
 	regulators {
 		compatible = "simple-bus";
 		#address-cells = <1>;
--- a/arch/arm/boot/dts/tegra20-whistler.dts
+++ b/arch/arm/boot/dts/tegra20-whistler.dts
@ -520,6 +520,19 @@ sdhci@c8000600 {
 		bus-width = <8>;
 	};

+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
 	kbc {
 		status = "okay";
 		nvidia,debounce-delay-ms = <20>;
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@ -418,6 +418,8 @@ kbc {
 	pmc {
 		compatible = "nvidia,tegra20-pmc";
 		reg = <0x7000e400 0x400>;
+		clocks = <&tegra_car 110>, <&clk32k_in>;
+		clock-names = "pclk", "clk32k_in";
 	};

 	memory-controller@7000f000 {
--- a/arch/arm/boot/dts/tegra30-beaver.dts
+++ b/arch/arm/boot/dts/tegra30-beaver.dts
@ -268,6 +268,19 @@ sdhci@78000600 {
 		bus-width = <8>;
 	};

+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
 	regulators {
 		compatible = "simple-bus";
 		#address-cells = <1>;
--- a/arch/arm/boot/dts/tegra30-cardhu.dtsi
+++ b/arch/arm/boot/dts/tegra30-cardhu.dtsi
@ -322,6 +322,19 @@ sdhci@78000600 {
 		bus-width = <8>;
 	};

+	clocks {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		clk32k_in: clock {
+			compatible = "fixed-clock";
+			reg=<0>;
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+	};
+
 	regulators {
 		compatible = "simple-bus";
 		#address-cells = <1>;
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@ -427,6 +427,8 @@ kbc {
 	pmc {
 		compatible = "nvidia,tegra30-pmc";
 		reg = <0x7000e400 0x400>;
+		clocks = <&tegra_car 218>, <&clk32k_in>;
+		clock-names = "pclk", "clk32k_in";
 	};

 	memory-controller {
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@ -28,6 +28,7 @@ obj-$(CONFIG_HOTPLUG_CPU)               += hotplug.o
 obj-$(CONFIG_CPU_FREQ)                  += cpu-tegra.o
 obj-$(CONFIG_TEGRA_PCI)			+= pcie.o

+obj-$(CONFIG_ARCH_TEGRA_114_SOC)	+= tegra114_speedo.o
 ifeq ($(CONFIG_CPU_IDLE),y)
 obj-$(CONFIG_ARCH_TEGRA_114_SOC)	+= cpuidle-tegra114.o
 endif
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@ -33,6 +33,7 @@
 #include "common.h"
 #include "fuse.h"
 #include "iomap.h"
+#include "irq.h"
 #include "pmc.h"
 #include "apbio.h"
 #include "sleep.h"
@ -61,8 +62,10 @@ u32 tegra_uart_config[4] = {
 void __init tegra_dt_init_irq(void)
 {
 	tegra_clocks_init();
+	tegra_pmc_init();
 	tegra_init_irq();
 	irqchip_init();
+	tegra_legacy_irq_syscore_init();
 }
 #endif

@ -100,12 +103,12 @@ void __init tegra_init_early(void)
 	tegra_apb_io_init();
 	tegra_init_fuse();
 	tegra_init_cache();
-	tegra_pmc_init();
 	tegra_powergate_init();
 	tegra_hotplug_init();
 }

 void __init tegra_init_late(void)
 {
+	tegra_init_suspend();
 	tegra_powergate_debugfs_init();
 }
--- a/arch/arm/mach-tegra/cpuidle-tegra20.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra20.c
@ -130,10 +130,6 @@ static bool tegra20_cpu_cluster_power_down(struct cpuidle_device *dev,
 					   struct cpuidle_driver *drv,
 					   int index)
 {
-	struct cpuidle_state *state = &drv->states[index];
-	u32 cpu_on_time = state->exit_latency;
-	u32 cpu_off_time = state->target_residency - state->exit_latency;
-
 	while (tegra20_cpu_is_resettable_soon())
 		cpu_relax();

@ -142,7 +138,7 @@ static bool tegra20_cpu_cluster_power_down(struct cpuidle_device *dev,

 	clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu);

-	tegra_idle_lp2_last(cpu_on_time, cpu_off_time);
+	tegra_idle_lp2_last();

 	clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu);

--- a/arch/arm/mach-tegra/cpuidle-tegra30.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra30.c
@ -72,10 +72,6 @@ static bool tegra30_cpu_cluster_power_down(struct cpuidle_device *dev,
 					   struct cpuidle_driver *drv,
 					   int index)
 {
-	struct cpuidle_state *state = &drv->states[index];
-	u32 cpu_on_time = state->exit_latency;
-	u32 cpu_off_time = state->target_residency - state->exit_latency;
-
 	/* All CPUs entering LP2 is not working.
 	 * Don't let CPU0 enter LP2 when any secondary CPU is online.
 	 */
@ -86,7 +82,7 @@ static bool tegra30_cpu_cluster_power_down(struct cpuidle_device *dev,

 	clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu);

-	tegra_idle_lp2_last(cpu_on_time, cpu_off_time);
+	tegra_idle_lp2_last();

 	clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu);

--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@ -2,6 +2,7 @@
 * arch/arm/mach-tegra/fuse.c
 *
 * Copyright (C) 2010 Google, Inc.
+ * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.
 *
 * Author:
 *	Colin Cross <ccross@android.com>
@ -137,6 +138,9 @@ void tegra_init_fuse(void)
 		tegra_fuse_spare_bit = TEGRA30_FUSE_SPARE_BIT;
 		tegra_init_speedo_data = &tegra30_init_speedo_data;
 		break;
+	case TEGRA114:
+		tegra_init_speedo_data = &tegra114_init_speedo_data;
+		break;
 	default:
 		pr_warn("Tegra: unknown chip id %d\n", tegra_chip_id);
 		tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
--- a/arch/arm/mach-tegra/fuse.h
+++ b/arch/arm/mach-tegra/fuse.h
@ -1,5 +1,6 @@
 /*
 * Copyright (C) 2010 Google, Inc.
+ * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.
 *
 * Author:
 *	Colin Cross <ccross@android.com>
@ -66,4 +67,10 @@ void tegra30_init_speedo_data(void);
 static inline void tegra30_init_speedo_data(void) {}
 #endif

+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+void tegra114_init_speedo_data(void);
+#else
+static inline void tegra114_init_speedo_data(void) {}
+#endif
+
 #endif
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@ -4,7 +4,7 @@
 * Author:
 *	Colin Cross <ccross@android.com>
 *
- * Copyright (C) 2010, NVIDIA Corporation
+ * Copyright (C) 2010,2013, NVIDIA Corporation
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
@ -23,6 +23,7 @@
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/irqchip/arm-gic.h>
+#include <linux/syscore_ops.h>

 #include "board.h"
 #include "iomap.h"
@ -43,6 +44,7 @@
 #define ICTLR_COP_IEP_CLASS	0x3c

 #define FIRST_LEGACY_IRQ 32
+#define TEGRA_MAX_NUM_ICTLRS	5

 #define SGI_MASK 0xFFFF

@ -56,6 +58,15 @@ static void __iomem *ictlr_reg_base[] = {
 	IO_ADDRESS(TEGRA_QUINARY_ICTLR_BASE),
 };

+#ifdef CONFIG_PM_SLEEP
+static u32 cop_ier[TEGRA_MAX_NUM_ICTLRS];
+static u32 cop_iep[TEGRA_MAX_NUM_ICTLRS];
+static u32 cpu_ier[TEGRA_MAX_NUM_ICTLRS];
+static u32 cpu_iep[TEGRA_MAX_NUM_ICTLRS];
+
+static u32 ictlr_wake_mask[TEGRA_MAX_NUM_ICTLRS];
+#endif
+
 bool tegra_pending_sgi(void)
 {
 	u32 pending_set;
@ -125,6 +136,87 @@ static int tegra_retrigger(struct irq_data *d)
 	return 1;
 }

+#ifdef CONFIG_PM_SLEEP
+static int tegra_set_wake(struct irq_data *d, unsigned int enable)
+{
+	u32 irq = d->irq;
+	u32 index, mask;
+
+	if (irq < FIRST_LEGACY_IRQ ||
+		irq >= FIRST_LEGACY_IRQ + num_ictlrs * 32)
+		return -EINVAL;
+
+	index = ((irq - FIRST_LEGACY_IRQ) / 32);
+	mask = BIT((irq - FIRST_LEGACY_IRQ) % 32);
+	if (enable)
+		ictlr_wake_mask[index] |= mask;
+	else
+		ictlr_wake_mask[index] &= ~mask;
+
+	return 0;
+}
+
+static int tegra_legacy_irq_suspend(void)
+{
+	unsigned long flags;
+	int i;
+
+	local_irq_save(flags);
+	for (i = 0; i < num_ictlrs; i++) {
+		void __iomem *ictlr = ictlr_reg_base[i];
+		/* Save interrupt state */
+		cpu_ier[i] = readl_relaxed(ictlr + ICTLR_CPU_IER);
+		cpu_iep[i] = readl_relaxed(ictlr + ICTLR_CPU_IEP_CLASS);
+		cop_ier[i] = readl_relaxed(ictlr + ICTLR_COP_IER);
+		cop_iep[i] = readl_relaxed(ictlr + ICTLR_COP_IEP_CLASS);
+
+		/* Disable COP interrupts */
+		writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
+
+		/* Disable CPU interrupts */
+		writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
+
+		/* Enable the wakeup sources of ictlr */
+		writel_relaxed(ictlr_wake_mask[i], ictlr + ICTLR_CPU_IER_SET);
+	}
+	local_irq_restore(flags);
+
+	return 0;
+}
+
+static void tegra_legacy_irq_resume(void)
+{
+	unsigned long flags;
+	int i;
+
+	local_irq_save(flags);
+	for (i = 0; i < num_ictlrs; i++) {
+		void __iomem *ictlr = ictlr_reg_base[i];
+		writel_relaxed(cpu_iep[i], ictlr + ICTLR_CPU_IEP_CLASS);
+		writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
+		writel_relaxed(cpu_ier[i], ictlr + ICTLR_CPU_IER_SET);
+		writel_relaxed(cop_iep[i], ictlr + ICTLR_COP_IEP_CLASS);
+		writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
+		writel_relaxed(cop_ier[i], ictlr + ICTLR_COP_IER_SET);
+	}
+	local_irq_restore(flags);
+}
+
+static struct syscore_ops tegra_legacy_irq_syscore_ops = {
+	.suspend = tegra_legacy_irq_suspend,
+	.resume = tegra_legacy_irq_resume,
+};
+
+int tegra_legacy_irq_syscore_init(void)
+{
+	register_syscore_ops(&tegra_legacy_irq_syscore_ops);
+
+	return 0;
+}
+#else
+#define tegra_set_wake NULL
+#endif
+
 void __init tegra_init_irq(void)
 {
 	int i;
@ -150,6 +242,8 @@ void __init tegra_init_irq(void)
 	gic_arch_extn.irq_mask = tegra_mask;
 	gic_arch_extn.irq_unmask = tegra_unmask;
 	gic_arch_extn.irq_retrigger = tegra_retrigger;
+	gic_arch_extn.irq_set_wake = tegra_set_wake;
+	gic_arch_extn.flags = IRQCHIP_MASK_ON_SUSPEND;

 	/*
 	 * Check if there is a devicetree present, since the GIC will be
--- a/arch/arm/mach-tegra/irq.h
+++ b/arch/arm/mach-tegra/irq.h
@ -19,4 +19,10 @@

 bool tegra_pending_sgi(void);

+#ifdef CONFIG_PM_SLEEP
+int tegra_legacy_irq_syscore_init(void);
+#else
+static inline int tegra_legacy_irq_syscore_init(void) { return 0; }
+#endif
+
 #endif
--- a/arch/arm/mach-tegra/platsmp.c
+++ b/arch/arm/mach-tegra/platsmp.c
@ -146,6 +146,12 @@ static int tegra30_boot_secondary(unsigned int cpu, struct task_struct *idle)
 	return 0;
 }

+static int tegra114_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	cpu = cpu_logical_map(cpu);
+	return tegra_pmc_cpu_power_on(cpu);
+}
+
 static int __cpuinit tegra_boot_secondary(unsigned int cpu,
 					  struct task_struct *idle)
 {
@ -153,6 +159,8 @@ static int __cpuinit tegra_boot_secondary(unsigned int cpu,
 		return tegra20_boot_secondary(cpu, idle);
 	if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_chip_id == TEGRA30)
 		return tegra30_boot_secondary(cpu, idle);
+	if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_chip_id == TEGRA114)
+		return tegra114_boot_secondary(cpu, idle);

 	return -EINVAL;
 }
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@ -22,7 +22,7 @@
 #include <linux/cpumask.h>
 #include <linux/delay.h>
 #include <linux/cpu_pm.h>
-#include <linux/clk.h>
+#include <linux/suspend.h>
 #include <linux/err.h>
 #include <linux/clk/tegra.h>

@ -37,52 +37,13 @@
 #include "reset.h"
 #include "flowctrl.h"
 #include "fuse.h"
+#include "pmc.h"
 #include "sleep.h"

-#define TEGRA_POWER_CPU_PWRREQ_OE	(1 << 16)  /* CPU pwr req enable */
-
-#define PMC_CTRL		0x0
-#define PMC_CPUPWRGOOD_TIMER	0xc8
-#define PMC_CPUPWROFF_TIMER	0xcc
-
 #ifdef CONFIG_PM_SLEEP
 static DEFINE_SPINLOCK(tegra_lp2_lock);
-static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
-static struct clk *tegra_pclk;
 void (*tegra_tear_down_cpu)(void);

-static void set_power_timers(unsigned long us_on, unsigned long us_off)
-{
-	unsigned long long ticks;
-	unsigned long long pclk;
-	unsigned long rate;
-	static unsigned long tegra_last_pclk;
-
-	if (tegra_pclk == NULL) {
-		tegra_pclk = clk_get_sys(NULL, "pclk");
-		WARN_ON(IS_ERR(tegra_pclk));
-	}
-
-	rate = clk_get_rate(tegra_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);
-		writel((unsigned long)ticks, pmc + PMC_CPUPWRGOOD_TIMER);
-
-		ticks = (us_off * pclk) + 999999ull;
-		do_div(ticks, 1000000);
-		writel((unsigned long)ticks, pmc + PMC_CPUPWROFF_TIMER);
-		wmb();
-	}
-	tegra_last_pclk = pclk;
-}
-
 /*
 * restore_cpu_complex
 *
@ -173,16 +134,9 @@ static int tegra_sleep_cpu(unsigned long v2p)
 	return 0;
 }

-void tegra_idle_lp2_last(u32 cpu_on_time, u32 cpu_off_time)
+void tegra_idle_lp2_last(void)
 {
-	u32 mode;
-
-	/* Only the last cpu down does the final suspend steps */
-	mode = readl(pmc + PMC_CTRL);
-	mode |= TEGRA_POWER_CPU_PWRREQ_OE;
-	writel(mode, pmc + PMC_CTRL);
-
-	set_power_timers(cpu_on_time, cpu_off_time);
+	tegra_pmc_pm_set(TEGRA_SUSPEND_LP2);

 	cpu_cluster_pm_enter();
 	suspend_cpu_complex();
@ -192,4 +146,81 @@ void tegra_idle_lp2_last(u32 cpu_on_time, u32 cpu_off_time)
 	restore_cpu_complex();
 	cpu_cluster_pm_exit();
 }
+
+enum tegra_suspend_mode tegra_pm_validate_suspend_mode(
+				enum tegra_suspend_mode mode)
+{
+	/* Tegra114 didn't support any suspending mode yet. */
+	if (tegra_chip_id == TEGRA114)
+		return TEGRA_SUSPEND_NONE;
+
+	/*
+	 * The Tegra devices only support suspending to LP2 currently.
+	 */
+	if (mode > TEGRA_SUSPEND_LP2)
+		return TEGRA_SUSPEND_LP2;
+
+	return mode;
+}
+
+static const char *lp_state[TEGRA_MAX_SUSPEND_MODE] = {
+	[TEGRA_SUSPEND_NONE] = "none",
+	[TEGRA_SUSPEND_LP2] = "LP2",
+	[TEGRA_SUSPEND_LP1] = "LP1",
+	[TEGRA_SUSPEND_LP0] = "LP0",
+};
+
+static int __cpuinit tegra_suspend_enter(suspend_state_t state)
+{
+	enum tegra_suspend_mode mode = tegra_pmc_get_suspend_mode();
+
+	if (WARN_ON(mode < TEGRA_SUSPEND_NONE ||
+		    mode >= TEGRA_MAX_SUSPEND_MODE))
+		return -EINVAL;
+
+	pr_info("Entering suspend state %s\n", lp_state[mode]);
+
+	tegra_pmc_pm_set(mode);
+
+	local_fiq_disable();
+
+	suspend_cpu_complex();
+	switch (mode) {
+	case TEGRA_SUSPEND_LP2:
+		tegra_set_cpu_in_lp2(0);
+		break;
+	default:
+		break;
+	}
+
+	cpu_suspend(PHYS_OFFSET - PAGE_OFFSET, &tegra_sleep_cpu);
+
+	switch (mode) {
+	case TEGRA_SUSPEND_LP2:
+		tegra_clear_cpu_in_lp2(0);
+		break;
+	default:
+		break;
+	}
+	restore_cpu_complex();
+
+	local_fiq_enable();
+
+	return 0;
+}
+
+static const struct platform_suspend_ops tegra_suspend_ops = {
+	.valid		= suspend_valid_only_mem,
+	.enter		= tegra_suspend_enter,
+};
+
+void __init tegra_init_suspend(void)
+{
+	if (tegra_pmc_get_suspend_mode() == TEGRA_SUSPEND_NONE)
+		return;
+
+	tegra_pmc_suspend_init();
+
+	suspend_set_ops(&tegra_suspend_ops);
+}
 #endif
--- a/arch/arm/mach-tegra/pm.h
+++ b/arch/arm/mach-tegra/pm.h
@ -21,6 +21,8 @@
 #ifndef _MACH_TEGRA_PM_H_
 #define _MACH_TEGRA_PM_H_

+#include "pmc.h"
+
 extern unsigned long l2x0_saved_regs_addr;

 void save_cpu_arch_register(void);
@ -29,7 +31,20 @@ void restore_cpu_arch_register(void);
 void tegra_clear_cpu_in_lp2(int phy_cpu_id);
 bool tegra_set_cpu_in_lp2(int phy_cpu_id);

-void tegra_idle_lp2_last(u32 cpu_on_time, u32 cpu_off_time);
+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
+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
+
 #endif /* _MACH_TEGRA_PM_H_ */
--- a/arch/arm/mach-tegra/pmc.c
+++ b/arch/arm/mach-tegra/pmc.c
@ -16,10 +16,20 @@
 */

 #include <linux/kernel.h>
+#include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_address.h>

+#include "fuse.h"
+#include "pm.h"
+#include "pmc.h"
+#include "sleep.h"
+
+#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
@ -27,6 +37,9 @@
 #define PMC_REMOVE_CLAMPING		0x34
 #define PMC_PWRGATE_STATUS		0x38

+#define PMC_CPUPWRGOOD_TIMER	0xc8
+#define PMC_CPUPWROFF_TIMER	0xcc
+
 #define TEGRA_POWERGATE_PCIE	3
 #define TEGRA_POWERGATE_VDEC	4
 #define TEGRA_POWERGATE_CPU1	9
@ -43,6 +56,23 @@ 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)
 {
@ -133,6 +163,70 @@ int tegra_pmc_cpu_remove_clamping(int cpuid)
 	return tegra_pmc_powergate_remove_clamping(id);
 }

+#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_pm_set(enum tegra_suspend_mode mode)
+{
+	u32 reg;
+	unsigned long rate = 0;
+
+	reg = tegra_pmc_readl(PMC_CTRL);
+	reg |= TEGRA_POWER_CPU_PWRREQ_OE;
+	reg &= ~TEGRA_POWER_EFFECT_LP0;
+
+	switch (mode) {
+	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);
+}
+#endif
+
 static const struct of_device_id matches[] __initconst = {
 	{ .compatible = "nvidia,tegra114-pmc" },
 	{ .compatible = "nvidia,tegra30-pmc" },
@ -143,6 +237,10 @@ static const struct of_device_id matches[] __initconst = {
 static void tegra_pmc_parse_dt(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);
@ -151,6 +249,70 @@ static void tegra_pmc_parse_dt(void)

 	tegra_pmc_invert_interrupt = of_property_read_bool(np,
 				     "nvidia,invert-interrupt");
+	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;
 }

 void __init tegra_pmc_init(void)
--- a/arch/arm/mach-tegra/pmc.h
+++ b/arch/arm/mach-tegra/pmc.h
@ -18,6 +18,20 @@
 #ifndef __MACH_TEGRA_PMC_H
 #define __MACH_TEGRA_PMC_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_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);
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@ -33,6 +33,8 @@
 #include <linux/io.h>
 #include <linux/i2c.h>
 #include <linux/i2c-tegra.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
 #include <linux/usb/tegra_usb_phy.h>

 #include <asm/mach-types.h>
@ -42,6 +44,7 @@

 #include "board.h"
 #include "common.h"
+#include "fuse.h"
 #include "iomap.h"

 static struct tegra_ehci_platform_data tegra_ehci1_pdata = {
@ -80,12 +83,36 @@ static struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = {

 static void __init tegra_dt_init(void)
 {
+	struct soc_device_attribute *soc_dev_attr;
+	struct soc_device *soc_dev;
+	struct device *parent = NULL;
+
+	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+	if (!soc_dev_attr)
+		goto out;
+
+	soc_dev_attr->family = kasprintf(GFP_KERNEL, "Tegra");
+	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d", tegra_revision);
+	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%d", tegra_chip_id);
+
+	soc_dev = soc_device_register(soc_dev_attr);
+	if (IS_ERR(soc_dev)) {
+		kfree(soc_dev_attr->family);
+		kfree(soc_dev_attr->revision);
+		kfree(soc_dev_attr->soc_id);
+		kfree(soc_dev_attr);
+		goto out;
+	}
+
+	parent = soc_device_to_device(soc_dev);
+
 	/*
 	 * Finished with the static registrations now; fill in the missing
 	 * devices
 	 */
+out:
 	of_platform_populate(NULL, of_default_bus_match_table,
-				tegra20_auxdata_lookup, NULL);
+				tegra20_auxdata_lookup, parent);
 }

 static void __init trimslice_init(void)
--- a/arch/arm/mach-tegra/tegra114_speedo.c
+++ b/arch/arm/mach-tegra/tegra114_speedo.c
@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 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/bug.h>
+
+#include "fuse.h"
+
+#define CORE_PROCESS_CORNERS_NUM	2
+#define CPU_PROCESS_CORNERS_NUM		2
+
+enum {
+	THRESHOLD_INDEX_0,
+	THRESHOLD_INDEX_1,
+	THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
+	{1123,     UINT_MAX},
+	{0,        UINT_MAX},
+};
+
+static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
+	{1695,     UINT_MAX},
+	{0,        UINT_MAX},
+};
+
+static void rev_sku_to_speedo_ids(int rev, int sku, int *threshold)
+{
+	u32 tmp;
+
+	switch (sku) {
+	case 0x00:
+	case 0x10:
+	case 0x05:
+	case 0x06:
+		tegra_cpu_speedo_id = 1;
+		tegra_soc_speedo_id = 0;
+		*threshold = THRESHOLD_INDEX_0;
+		break;
+
+	case 0x03:
+	case 0x04:
+		tegra_cpu_speedo_id = 2;
+		tegra_soc_speedo_id = 1;
+		*threshold = THRESHOLD_INDEX_1;
+		break;
+
+	default:
+		pr_err("Tegra114 Unknown SKU %d\n", sku);
+		tegra_cpu_speedo_id = 0;
+		tegra_soc_speedo_id = 0;
+		*threshold = THRESHOLD_INDEX_0;
+		break;
+	}
+
+	if (rev == TEGRA_REVISION_A01) {
+		tmp = tegra_fuse_readl(0x270) << 1;
+		tmp |= tegra_fuse_readl(0x26c);
+		if (!tmp)
+			tegra_cpu_speedo_id = 0;
+	}
+}
+
+void tegra114_init_speedo_data(void)
+{
+	u32 cpu_speedo_val;
+	u32 core_speedo_val;
+	int threshold;
+	int i;
+
+	BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+	BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
+			THRESHOLD_INDEX_COUNT);
+
+	rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id, &threshold);
+
+	cpu_speedo_val = tegra_fuse_readl(0x12c) + 1024;
+	core_speedo_val = tegra_fuse_readl(0x134);
+
+	for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++)
+		if (cpu_speedo_val < cpu_process_speedos[threshold][i])
+			break;
+	tegra_cpu_process_id = i;
+
+	for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++)
+		if (core_speedo_val < core_process_speedos[threshold][i])
+			break;
+	tegra_core_process_id = i;
+}
--- a/drivers/gpio/gpio-tegra.c
+++ b/drivers/gpio/gpio-tegra.c
@ -72,6 +72,7 @@ struct tegra_gpio_bank {
 	u32 oe[4];
 	u32 int_enb[4];
 	u32 int_lvl[4];
+	u32 wake_enb[4];
 #endif
 };

@ -333,15 +334,31 @@ static int tegra_gpio_suspend(struct device *dev)
 			bank->oe[p] = tegra_gpio_readl(GPIO_OE(gpio));
 			bank->int_enb[p] = tegra_gpio_readl(GPIO_INT_ENB(gpio));
 			bank->int_lvl[p] = tegra_gpio_readl(GPIO_INT_LVL(gpio));
+
+			/* Enable gpio irq for wake up source */
+			tegra_gpio_writel(bank->wake_enb[p],
+					  GPIO_INT_ENB(gpio));
 		}
 	}
 	local_irq_restore(flags);
 	return 0;
 }

-static int tegra_gpio_wake_enable(struct irq_data *d, unsigned int enable)
+static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
 {
 	struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
+	int gpio = d->hwirq;
+	u32 port, bit, mask;
+
+	port = GPIO_PORT(gpio);
+	bit = GPIO_BIT(gpio);
+	mask = BIT(bit);
+
+	if (enable)
+		bank->wake_enb[port] |= mask;
+	else
+		bank->wake_enb[port] &= ~mask;
+
 	return irq_set_irq_wake(bank->irq, enable);
 }
 #endif
@ -353,7 +370,7 @@ static struct irq_chip tegra_gpio_irq_chip = {
 	.irq_unmask	= tegra_gpio_irq_unmask,
 	.irq_set_type	= tegra_gpio_irq_set_type,
 #ifdef CONFIG_PM_SLEEP
-	.irq_set_wake	= tegra_gpio_wake_enable,
+	.irq_set_wake	= tegra_gpio_irq_set_wake,
 #endif
 };