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ARM: tegra: add Tegra114 ARM_CPUIDLE_WFI_STATE support

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Adding the generic ARM_CPUIDLE_WFI_STATE support for Tegra114.

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Joseph Lo 2013-01-21 17:49:06 +08:00 committed by Stephen Warren
parent 2da139657b
commit 51dc5259e8
4 changed files with 73 additions and 0 deletions
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3
arch/arm/mach-tegra/Makefile
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@ -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

61
arch/arm/mach-tegra/cpuidle-tegra114.c Normal file
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@ -0,0 +1,61 @@
/*
* 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;
}

3
arch/arm/mach-tegra/cpuidle.c
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@ -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;

6
arch/arm/mach-tegra/cpuidle.h
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@ -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