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extcon: usb-gpio: Add pinctrl operation during system PM

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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>
This commit is contained in:
Peter Chen 2017-01-04 15:19:51 +08:00 committed by Chanwoo Choi
parent e6cf046543
commit bcb7440e76
1 changed files with 7 additions and 0 deletions
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7
drivers/extcon/extcon-usb-gpio.c
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@ -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);