Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1375396

Re: [PATCH v2] extcon: usb-gpio: Don't miss event during suspend/resume

Show all headers | View raw

Hi Roger,

On 2016년 04월 08일 16:34, Roger Quadros wrote:
> Pin state might have changed during suspend/resume while
> our interrupts were disabled and if device doesn't support wakeup.
> 
> Scan for change during resume for such case.
> 
> Signed-off-by: Roger Quadros <rogerq@ti.com>
> ---
> v2:
> - only check for state change during resume if device wakeup is not supported
> 
>  drivers/extcon/extcon-usb-gpio.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/extcon/extcon-usb-gpio.c b/drivers/extcon/extcon-usb-gpio.c
> index bc61d11..118f8ab 100644
> --- a/drivers/extcon/extcon-usb-gpio.c
> +++ b/drivers/extcon/extcon-usb-gpio.c
> @@ -185,6 +185,8 @@ static int usb_extcon_resume(struct device *dev)
>  	int ret = 0;
>  
>  	enable_irq(info->id_irq);
> +	if (!device_may_wakeup(dev))
> +		usb_extcon_detect_cable(&info->wq_detcable.work);

The device_may_wakeup() check the following two states:
- dev->power.can_wakeup - device_init_wakeup() function set the this field.
- dev->power.wakeup - device_wakeup_enable() function set the this field.

The probe function of extcon-usb-gpio.c always call the 'device_init_wakeup(dev,true).
But, anywhere in extcon-usb-gpio.c don't handle the device_wakeup_enable() for dev->power.wakeup.

In the extcon-usb-gpio.c, device_may_wakeup(dev) return always 'false'.
If you use the only device_may_wakeup(),
device_may_wakeup() is not able to check whether interrupt is wakeup source or not.

Thanks,
Chanwoo Choi

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH] extcon: usb-gpio: Don't miss event during suspend/resume Roger Quadros <rogerq@ti.com> - 2016-04-06 16:10 +0200
  Re: [PATCH] extcon: usb-gpio: Don't miss event during suspend/resume Chanwoo Choi <cw00.choi@samsung.com> - 2016-04-08 01:40 +0200
  [PATCH v2] extcon: usb-gpio: Don't miss event during suspend/resume Roger Quadros <rogerq@ti.com> - 2016-04-08 09:40 +0200
    Re: [PATCH v2] extcon: usb-gpio: Don't miss event during suspend/resume Chanwoo Choi <cw00.choi@samsung.com> - 2016-04-11 02:40 +0200
      Re: [PATCH v2] extcon: usb-gpio: Don't miss event during  suspend/resume Grygorii Strashko <grygorii.strashko@ti.com> - 2016-04-11 10:40 +0200
        Re: [PATCH v2] extcon: usb-gpio: Don't miss event during suspend/resume Chanwoo Choi <cw00.choi@samsung.com> - 2016-04-11 13:20 +0200
          Re: [PATCH v2] extcon: usb-gpio: Don't miss event during  suspend/resume Roger Quadros <rogerq@ti.com> - 2016-04-11 13:40 +0200
            Re: [PATCH v2] extcon: usb-gpio: Don't miss event during suspend/resume Chanwoo Choi <cwchoi00@gmail.com> - 2016-04-11 15:20 +0200
              Re: [PATCH v2] extcon: usb-gpio: Don't miss event during  suspend/resume Roger Quadros <rogerq@ti.com> - 2016-04-11 16:10 +0200
    [PATCH v3] extcon: usb-gpio: Don't miss event during suspend/resume Roger Quadros <rogerq@ti.com> - 2016-04-11 16:10 +0200
      Re: [PATCH v3] extcon: usb-gpio: Don't miss event during suspend/resume Chanwoo Choi <cw00.choi@samsung.com> - 2016-04-12 00:50 +0200

csiph-web