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authorRongjun Ying <rongjun.ying@csr.com>2014-01-09 01:50:13 +0100
committerChanwoo Choi <cw00.choi@samsung.com>2014-01-09 01:53:30 +0100
commit6544dfa5795060b01042fd62fd1a92e18c2fc485 (patch)
treea5f3f3b261e820aeb7ee703e80ca2a68805f3947
parentextcon: max14577: Add extcon-max14577 driver to support MUIC device (diff)
downloadlinux-6544dfa5795060b01042fd62fd1a92e18c2fc485.tar.xz
linux-6544dfa5795060b01042fd62fd1a92e18c2fc485.zip
extcon: gpio: Add power resume support
When system on the suspend state, Some SoC can't get gpio interrupt. After system resume, need send extcon uevent to userspace. Signed-off-by: Rongjun Ying <rongjun.ying@csr.com> Reviewed-by: Barry Song <Baohua.Song@csr.com> Acked-by: Myungjoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
-rw-r--r--drivers/extcon/extcon-gpio.c21
-rw-r--r--include/linux/extcon/extcon-gpio.h1
2 files changed, 22 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
index 4736a9c57efa..a63a6b21c9ad 100644
--- a/drivers/extcon/extcon-gpio.c
+++ b/drivers/extcon/extcon-gpio.c
@@ -40,6 +40,7 @@ struct gpio_extcon_data {
int irq;
struct delayed_work work;
unsigned long debounce_jiffies;
+ bool check_on_resume;
};
static void gpio_extcon_work(struct work_struct *work)
@@ -103,6 +104,7 @@ static int gpio_extcon_probe(struct platform_device *pdev)
extcon_data->gpio_active_low = pdata->gpio_active_low;
extcon_data->state_on = pdata->state_on;
extcon_data->state_off = pdata->state_off;
+ extcon_data->check_on_resume = pdata->check_on_resume;
if (pdata->state_on && pdata->state_off)
extcon_data->edev.print_state = extcon_gpio_print_state;
@@ -160,12 +162,31 @@ static int gpio_extcon_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int gpio_extcon_resume(struct device *dev)
+{
+ struct gpio_extcon_data *extcon_data;
+
+ extcon_data = dev_get_drvdata(dev);
+ if (extcon_data->check_on_resume)
+ queue_delayed_work(system_power_efficient_wq,
+ &extcon_data->work, extcon_data->debounce_jiffies);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops gpio_extcon_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(NULL, gpio_extcon_resume)
+};
+
static struct platform_driver gpio_extcon_driver = {
.probe = gpio_extcon_probe,
.remove = gpio_extcon_remove,
.driver = {
.name = "extcon-gpio",
.owner = THIS_MODULE,
+ .pm = &gpio_extcon_pm_ops,
},
};
diff --git a/include/linux/extcon/extcon-gpio.h b/include/linux/extcon/extcon-gpio.h
index 4195810f87fe..8900fdf511c6 100644
--- a/include/linux/extcon/extcon-gpio.h
+++ b/include/linux/extcon/extcon-gpio.h
@@ -51,6 +51,7 @@ struct gpio_extcon_platform_data {
/* if NULL, "0" or "1" will be printed */
const char *state_on;
const char *state_off;
+ bool check_on_resume;
};
#endif /* __EXTCON_GPIO_H__ */