Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d5db9a44 authored by Joseph Lo's avatar Joseph Lo Committed by Stephen Warren
Browse files

ARM: tegra: cpuidle: replace LP3 with ARM_CPUIDLE_WFI_STATE 



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: default avatarJoseph Lo <josephl@nvidia.com>
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
parent d1d3b978

arch/arm/mach-tegra/cpuidle.c

+3 −39
Original line number Diff line number Diff line
@@ -23,58 +23,22 @@ 


#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/cpu.h>

#include <linux/cpuidle.h>

#include <linux/hrtimer.h>



#include <asm/proc-fns.h>



static int tegra_idle_enter_lp3(struct cpuidle_device *dev,

				struct cpuidle_driver *drv, int index);

#include <asm/cpuidle.h>



struct cpuidle_driver tegra_idle_driver = {

	.name = "tegra_idle",

	.owner = THIS_MODULE,

	.en_core_tk_irqen = 1,

	.state_count = 1,

	.states = {

		[0] = {

			.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",

		},

		[0] = ARM_CPUIDLE_WFI_STATE_PWR(600),

	},

};



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)

{

	int ret;