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Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/g…
…it/kgene/linux-samsung into devel-stable Conflicts: arch/arm/Kconfig arch/arm/mach-exynos4/mach-nuri.c
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /* linux/arch/arm/mach-exynos4/cpuidle.c | ||
| * | ||
| * Copyright (c) 2011 Samsung Electronics Co., Ltd. | ||
| * http://www.samsung.com | ||
| * | ||
| * 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/kernel.h> | ||
| #include <linux/init.h> | ||
| #include <linux/cpuidle.h> | ||
| #include <linux/io.h> | ||
|
|
||
| #include <asm/proc-fns.h> | ||
|
|
||
| static int exynos4_enter_idle(struct cpuidle_device *dev, | ||
| struct cpuidle_state *state); | ||
|
|
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| static struct cpuidle_state exynos4_cpuidle_set[] = { | ||
| [0] = { | ||
| .enter = exynos4_enter_idle, | ||
| .exit_latency = 1, | ||
| .target_residency = 100000, | ||
| .flags = CPUIDLE_FLAG_TIME_VALID, | ||
| .name = "IDLE", | ||
| .desc = "ARM clock gating(WFI)", | ||
| }, | ||
| }; | ||
|
|
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| static DEFINE_PER_CPU(struct cpuidle_device, exynos4_cpuidle_device); | ||
|
|
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| static struct cpuidle_driver exynos4_idle_driver = { | ||
| .name = "exynos4_idle", | ||
| .owner = THIS_MODULE, | ||
| }; | ||
|
|
||
| static int exynos4_enter_idle(struct cpuidle_device *dev, | ||
| struct cpuidle_state *state) | ||
| { | ||
| struct timeval before, after; | ||
| int idle_time; | ||
|
|
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| local_irq_disable(); | ||
| do_gettimeofday(&before); | ||
|
|
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| cpu_do_idle(); | ||
|
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| do_gettimeofday(&after); | ||
| local_irq_enable(); | ||
| idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC + | ||
| (after.tv_usec - before.tv_usec); | ||
|
|
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| return idle_time; | ||
| } | ||
|
|
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| static int __init exynos4_init_cpuidle(void) | ||
| { | ||
| int i, max_cpuidle_state, cpu_id; | ||
| struct cpuidle_device *device; | ||
|
|
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| cpuidle_register_driver(&exynos4_idle_driver); | ||
|
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| for_each_cpu(cpu_id, cpu_online_mask) { | ||
| device = &per_cpu(exynos4_cpuidle_device, cpu_id); | ||
| device->cpu = cpu_id; | ||
|
|
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| device->state_count = (sizeof(exynos4_cpuidle_set) / | ||
| sizeof(struct cpuidle_state)); | ||
|
|
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| max_cpuidle_state = device->state_count; | ||
|
|
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| for (i = 0; i < max_cpuidle_state; i++) { | ||
| memcpy(&device->states[i], &exynos4_cpuidle_set[i], | ||
| sizeof(struct cpuidle_state)); | ||
| } | ||
|
|
||
| if (cpuidle_register_device(device)) { | ||
| printk(KERN_ERR "CPUidle register device failed\n,"); | ||
| return -EIO; | ||
| } | ||
| } | ||
| return 0; | ||
| } | ||
| device_initcall(exynos4_init_cpuidle); |
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