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pm2301-charger: Add pm_runtime_resume & pm_runtime_suspend

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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: M BenZoubeir <mustapha.ben.zoubeir-xsig@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Philippe LANGLAIS <philippe.langlais@stericsson.com>
This commit is contained in:
Lee Jones 2013-02-25 14:28:59 +00:00
parent f4095a0f06
commit aee2b8468c
1 changed files with 68 additions and 0 deletions
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68
drivers/power/pm2301_charger.c
View file

@ -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,
};