From: M BenZoubeir <[email protected]> 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 <[email protected]> Signed-off-by: Lee Jones <[email protected]> Reviewed-by: Philippe LANGLAIS <[email protected]> --- drivers/power/pm2301_charger.c | 68 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) diff --git a/drivers/power/pm2301_charger.c b/drivers/power/pm2301_charger.c index 98e27a8..2cc92ec 100644 --- a/drivers/power/pm2301_charger.c +++ b/drivers/power/pm2301_charger.c @@ -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 __devinit pm2xxx_wall_charger_probe(struct i2c_client *i2c_client, const struct i2c_device_id *id) { @@ -1077,6 +1132,16 @@ static int __devinit 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 __devexit 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, }; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
