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ARM: tegra: cpuidle: replace LP3 with ARM_CPUIDLE_WFI_STATE

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The Tegra CPU idle LP3 state is doing ARM WFI only. So it's same with
the common ARM_CPUIDLE_WFI_STATE. Using it to replace LP3 now.

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Joseph Lo 2012-10-08 18:24:16 +08:00 committed by Stephen Warren
parent d1d3b978f6
commit d5db9a4422
1 changed files with 3 additions and 39 deletions
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42
arch/arm/mach-tegra/cpuidle.c
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@ -23,58 +23,22 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/cpu.h>
#include <linux/cpuidle.h> #include <linux/cpuidle.h>
#include <linux/hrtimer.h>
#include <asm/proc-fns.h> #include <asm/cpuidle.h>
static int tegra_idle_enter_lp3(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index);
struct cpuidle_driver tegra_idle_driver = { struct cpuidle_driver tegra_idle_driver = {
.name = "tegra_idle", .name = "tegra_idle",
.owner = THIS_MODULE, .owner = THIS_MODULE,
.en_core_tk_irqen = 1,
.state_count = 1, .state_count = 1,
.states = { .states = {
[0] = { [0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
.enter = tegra_idle_enter_lp3,
.exit_latency = 10,
.target_residency = 10,
.power_usage = 600,
.flags = CPUIDLE_FLAG_TIME_VALID,
.name = "LP3",
.desc = "CPU flow-controlled",
},
}, },
}; };
static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device); static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device);
static int tegra_idle_enter_lp3(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
ktime_t enter, exit;
s64 us;
local_irq_disable();
local_fiq_disable();
enter = ktime_get();
cpu_do_idle();
exit = ktime_sub(ktime_get(), enter);
us = ktime_to_us(exit);
local_fiq_enable();
local_irq_enable();
dev->last_residency = us;
return index;
}
static int __init tegra_cpuidle_init(void) static int __init tegra_cpuidle_init(void)
{ {
int ret; int ret;