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authorLee Jones <lee.jones@linaro.org>2013-02-25 14:28:59 +0000
committerLee Jones <lee.jones@linaro.org>2013-03-07 12:35:51 +0800
commitaee2b8468caf3d1eed6e329e828bc09eaa61063a (patch)
tree85a025145aa08b9071b93061e53165d7b2c82980 /drivers/power/pm2301_charger.c
parentf4095a0f06476e5914f2c58b4e96258b2e2ba6b7 (diff)
downloadvexpress-lsk-aee2b8468caf3d1eed6e329e828bc09eaa61063a.tar.gz
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: 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>
Diffstat (limited to 'drivers/power/pm2301_charger.c')
-rw-r--r--drivers/power/pm2301_charger.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/drivers/power/pm2301_charger.c b/drivers/power/pm2301_charger.c
index eed8a89ba4f..fde5805fdab 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 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,
};