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Commit aee2b846 authored by Lee Jones's avatar Lee Jones
Browse files

pm2301-charger: Add pm_runtime_resume & pm_runtime_suspend 



To optimize the current consumption we use pm_runtime autosuspend
functions which execute the pm_runtime_suspend after a delay of
inactivity on the other hand we use pm_runtime_resume every time
we receive an interruption to wake up the pm2301.

Signed-off-by: default avatarM BenZoubeir <mustapha.ben.zoubeir-xsig@stericsson.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Reviewed-by: default avatarPhilippe LANGLAIS <philippe.langlais@stericsson.com>
parent f4095a0f

drivers/power/pm2301_charger.c

+68 −0
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
#include <linux/mfd/abx500/ux500_chargalg.h>

#include <linux/pm2301_charger.h>

#include <linux/gpio.h>

#include <linux/pm_runtime.h>



#include "pm2301_charger.h"
@@ -36,6 +37,7 @@ 
		struct pm2xxx_charger, ac_chg)

#define SLEEP_MIN		50

#define SLEEP_MAX		100

#define PM2XXX_AUTOSUSPEND_DELAY 500



static int pm2xxx_interrupt_registers[] = {

	PM2XXX_REG_INT1,
@@ -493,6 +495,9 @@ static irqreturn_t pm2xxx_irq_int(int irq, void *data) 
	struct pm2xxx_interrupts *interrupt = pm2->pm2_int;

	int i;



	/* wake up the device */

	pm_runtime_get_sync(pm2->dev);



	do {

		for (i = 0; i < PM2XXX_NUM_INT_REG; i++) {

			pm2xxx_reg_read(pm2,
@@ -504,6 +509,9 @@ static irqreturn_t pm2xxx_irq_int(int irq, void *data) 
		}

	} while (gpio_get_value(pm2->pdata->gpio_irq_number) == 0);



	pm_runtime_mark_last_busy(pm2->dev);

	pm_runtime_put_autosuspend(pm2->dev);



	return IRQ_HANDLED;

}
@@ -946,6 +954,53 @@ static int pm2xxx_wall_charger_suspend(struct i2c_client *i2c_client, 
	return 0;

}



#ifdef CONFIG_PM

static int  pm2xxx_runtime_suspend(struct device *dev)

{

	struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev);

	struct pm2xxx_charger *pm2;

	int ret = 0;



	pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client);

	if (!pm2) {

		dev_err(pm2->dev, "no pm2xxx_charger data supplied\n");

		ret = -EINVAL;

		return ret;

	}



	clear_lpn_pin(pm2);



	return ret;

}



static int  pm2xxx_runtime_resume(struct device *dev)

{

	struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev);

	struct pm2xxx_charger *pm2;

	int ret = 0;



	pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client);

	if (!pm2) {

		dev_err(pm2->dev, "no pm2xxx_charger data supplied\n");

		ret = -EINVAL;

		return ret;

	}



	if (gpio_is_valid(pm2->lpn_pin) && gpio_get_value(pm2->lpn_pin) == 0)

		set_lpn_pin(pm2);



	return ret;

}



static const struct dev_pm_ops pm2xxx_pm_ops = {

	.runtime_suspend = pm2xxx_runtime_suspend,

	.runtime_resume = pm2xxx_runtime_resume,

};

#define  PM2XXX_PM_OPS (&pm2xxx_pm_ops)

#else

#define  PM2XXX_PM_OPS  NULL

#endif



static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,

		const struct i2c_device_id *id)

{
@@ -1077,6 +1132,16 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client, 
			gpio_to_irq(pm2->pdata->gpio_irq_number), ret);

		goto unregister_pm2xxx_charger;

	}



	ret = pm_runtime_set_active(pm2->dev);

	if (ret)

		dev_err(pm2->dev, "set active Error\n");



	pm_runtime_enable(pm2->dev);

	pm_runtime_set_autosuspend_delay(pm2->dev, PM2XXX_AUTOSUSPEND_DELAY);

	pm_runtime_use_autosuspend(pm2->dev);

	pm_runtime_resume(pm2->dev);



	/* pm interrupt can wake up system */

	ret = enable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number));

	if (ret) {
@@ -1148,6 +1213,8 @@ static int pm2xxx_wall_charger_remove(struct i2c_client *i2c_client) 
{

	struct pm2xxx_charger *pm2 = i2c_get_clientdata(i2c_client);



	/* Disable pm_runtime */

	pm_runtime_disable(pm2->dev);

	/* Disable AC charging */

	pm2xxx_charger_ac_en(&pm2->ac_chg, false, 0, 0);
@@ -1189,6 +1256,7 @@ static struct i2c_driver pm2xxx_charger_driver = { 
	.driver = {

		.name = "pm2xxx-wall_charger",

		.owner = THIS_MODULE,

		.pm = PM2XXX_PM_OPS,

	},

	.id_table = pm2xxx_id,

};