On 12/27/2013 02:40 PM, rjying wrote:
> From: Rongjun Ying <rongjun.y...@csr.com>
>
> 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.y...@csr.com>
> ---
> -v2: Add lost_sleep_irq flags.
>
> drivers/extcon/extcon-gpio.c | 20 ++++++++++++++++++++
> include/linux/extcon/extcon-gpio.h | 1 +
> 2 files changed, 21 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
> index 7e0dff5..fde52c1 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 lost_sleep_irq;
I prefer 'check_on_resume' instead of 'load_sleep_irq'.
> };
>
> 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->lost_sleep_irq = pdata->lost_sleep_irq;
ditto.
> if (pdata->state_on && pdata->state_off)
> extcon_data->edev.print_state = extcon_gpio_print_state;
> if (pdata->debounce) {
> @@ -159,12 +161,30 @@ 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->lost_sleep_irq)
ditto.
> + 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 4195810..c7f0c3e 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 lost_sleep_irq;
ditto.
> };
>
> #endif /* __EXTCON_GPIO_H__ */
>
Thanks,
Chanwoo Choi
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