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Commit 51dc5259 authored by Joseph Lo's avatar Joseph Lo Committed by Stephen Warren
Browse files

ARM: tegra: add Tegra114 ARM_CPUIDLE_WFI_STATE support 



Adding the generic ARM_CPUIDLE_WFI_STATE support for Tegra114.

Signed-off-by: default avatarJoseph Lo <josephl@nvidia.com>
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
parent 2da13965

arch/arm/mach-tegra/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -30,6 +30,9 @@ obj-$(CONFIG_TEGRA_PCI) += pcie.o 
obj-$(CONFIG_ARCH_TEGRA_2x_SOC)		+= board-dt-tegra20.o

obj-$(CONFIG_ARCH_TEGRA_3x_SOC)		+= board-dt-tegra30.o

obj-$(CONFIG_ARCH_TEGRA_114_SOC)	+= board-dt-tegra114.o

ifeq ($(CONFIG_CPU_IDLE),y)

obj-$(CONFIG_ARCH_TEGRA_114_SOC)	+= cpuidle-tegra114.o

endif



obj-$(CONFIG_ARCH_TEGRA_2x_SOC)		+= board-harmony-pcie.o

arch/arm/mach-tegra/cpuidle-tegra114.c

0 → 100644
+61 −0
Original line number Diff line number Diff line 
/*

 * 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/module.h>

#include <linux/cpuidle.h>



#include <asm/cpuidle.h>



static struct cpuidle_driver tegra_idle_driver = {

	.name = "tegra_idle",

	.owner = THIS_MODULE,

	.en_core_tk_irqen = 1,

	.state_count = 1,

	.states = {

		[0] = ARM_CPUIDLE_WFI_STATE_PWR(600),

	},

};



static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device);



int __init tegra114_cpuidle_init(void)

{

	int ret;

	unsigned int cpu;

	struct cpuidle_device *dev;

	struct cpuidle_driver *drv = &tegra_idle_driver;



	ret = cpuidle_register_driver(&tegra_idle_driver);

	if (ret) {

		pr_err("CPUidle driver registration failed\n");

		return ret;

	}



	for_each_possible_cpu(cpu) {

		dev = &per_cpu(tegra_idle_device, cpu);

		dev->cpu = cpu;



		dev->state_count = drv->state_count;

		ret = cpuidle_register_device(dev);

		if (ret) {

			pr_err("CPU%u: CPUidle device registration failed\n",

				cpu);

			return ret;

		}

	}

	return 0;

}

arch/arm/mach-tegra/cpuidle.c

+3 −0
Original line number Diff line number Diff line
@@ -38,6 +38,9 @@ static int __init tegra_cpuidle_init(void) 
	case TEGRA30:

		ret = tegra30_cpuidle_init();

		break;

	case TEGRA114:

		ret = tegra114_cpuidle_init();

		break;

	default:

		ret = -ENODEV;

		break;

arch/arm/mach-tegra/cpuidle.h

+6 −0
Original line number Diff line number Diff line
@@ -29,4 +29,10 @@ int tegra30_cpuidle_init(void); 
static inline int tegra30_cpuidle_init(void) { return -ENODEV; }

#endif



#ifdef CONFIG_ARCH_TEGRA_114_SOC

int tegra114_cpuidle_init(void);

#else

static inline int tegra114_cpuidle_init(void) { return -ENODEV; }

#endif



#endif