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authorPeter Chen <peter.chen@nxp.com>2017-01-04 08:19:51 +0100
committerChanwoo Choi <cw00.choi@samsung.com>2017-01-09 02:04:12 +0100
commitbcb7440e76a96c8a244bd683142a38f7d5cecb93 (patch)
treed10b19d22a15882c2f28d01319cd947af6dd278e /drivers/extcon
parentextcon: Move defintion of struct extcon_dev to driver/extcon directory (diff)
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extcon: usb-gpio: Add pinctrl operation during system PM
At some systems, the pinctrl setting will be lost or needs to set as "sleep" state to save power consumption. So, we need to configure pinctrl as "sleep" state when system enters suspend, and as "default" state after system resumes. In this way, the pinctrl value can be recovered as "default" state after resuming. Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/extcon')
-rw-r--r--drivers/extcon/extcon-usb-gpio.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-usb-gpio.c b/drivers/extcon/extcon-usb-gpio.c
index d589c5feff3d..a5e1882b4ca6 100644
--- a/drivers/extcon/extcon-usb-gpio.c
+++ b/drivers/extcon/extcon-usb-gpio.c
@@ -27,6 +27,7 @@
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/acpi.h>
+#include <linux/pinctrl/consumer.h>
#define USB_GPIO_DEBOUNCE_MS 20 /* ms */
@@ -245,6 +246,9 @@ static int usb_extcon_suspend(struct device *dev)
if (info->vbus_gpiod)
disable_irq(info->vbus_irq);
+ if (!device_may_wakeup(dev))
+ pinctrl_pm_select_sleep_state(dev);
+
return ret;
}
@@ -253,6 +257,9 @@ static int usb_extcon_resume(struct device *dev)
struct usb_extcon_info *info = dev_get_drvdata(dev);
int ret = 0;
+ if (!device_may_wakeup(dev))
+ pinctrl_pm_select_default_state(dev);
+
if (device_may_wakeup(dev)) {
if (info->id_gpiod) {
ret = disable_irq_wake(info->id_irq);