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>

diff --git a/drivers/extcon/extcon-usb-gpio.c b/drivers/extcon/extcon-usb-gpio.c
index d589c5feff3d7d082fd8372cf48a0c3d3181b9ff..a5e1882b4ca66e370f4c52c7c024290a1685afd7 100644 (file)
--- 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);