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Commit ccc12b32 authored by Robert Lee's avatar Robert Lee Committed by Sascha Hauer
Browse files

ARM: imx: Add imx5 cpuidle 



Add cpuidle driver for imx5 platform.

Signed-off-by: default avatarRobert Lee <rob.lee@linaro.org>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent 2da50e62

arch/arm/mach-imx/pm-imx5.c

+41 −2
Original line number Diff line number Diff line
@@ -12,10 +12,12 @@ 
#include <linux/clk.h>

#include <linux/io.h>

#include <linux/err.h>

#include <linux/export.h>

#include <asm/cacheflush.h>

#include <asm/system_misc.h>

#include <asm/tlbflush.h>

#include <mach/common.h>

#include <mach/cpuidle.h>

#include <mach/hardware.h>

#include "crm-regs-imx5.h"
@@ -134,12 +136,48 @@ static const struct platform_suspend_ops mx5_suspend_ops = { 
	.enter = mx5_suspend_enter,

};



static void imx5_pm_idle(void)

static inline int imx5_cpu_do_idle(void)

{

	if (likely(!tzic_enable_wake()))

	int ret = tzic_enable_wake();



	if (likely(!ret))

		cpu_do_idle();



	return ret;

}



static void imx5_pm_idle(void)

{

	imx5_cpu_do_idle();

}



static int imx5_cpuidle_enter(struct cpuidle_device *dev,

				struct cpuidle_driver *drv, int idx)

{

	int ret;



	ret = imx5_cpu_do_idle();

	if (ret < 0)

		return ret;



	return idx;

}



static struct cpuidle_driver imx5_cpuidle_driver = {

	.name			= "imx5_cpuidle",

	.owner			= THIS_MODULE,

	.en_core_tk_irqen	= 1,

	.states[0]	= {

		.enter			= imx5_cpuidle_enter,

		.exit_latency		= 2,

		.target_residency	= 1,

		.flags			= CPUIDLE_FLAG_TIME_VALID,

		.name			= "IMX5 SRPG",

		.desc			= "CPU state retained,powered off",

	},

	.state_count		= 1,

};



static int __init imx5_pm_common_init(void)

{

	int ret;
@@ -157,6 +195,7 @@ static int __init imx5_pm_common_init(void) 
	/* Set the registers to the default cpu idle state. */

	mx5_cpu_lp_set(IMX5_DEFAULT_CPU_IDLE_STATE);



	imx_cpuidle_init(&imx5_cpuidle_driver);

	return 0;

}