Messages in this thread Patch in this message | | | From | RongJun Ying <> | Subject | [PATCH v3] extcon: gpio: Add power resume support | Date | Tue, 7 Jan 2014 12:56:30 +0800 |
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From: Rongjun Ying <rongjun.ying@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.ying@csr.com> Reviewed-by: Barry Song <Baohua.Song@csr.com> --- -v3: 'check_on_resume' instead of 'load_sleep_irq' as Chanwoo Choi's proposal.
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 check_on_resume; };
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->check_on_resume = pdata->check_on_resume; 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->check_on_resume) + 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 check_on_resume; };
#endif /* __EXTCON_GPIO_H__ */ -- 1.7.5.4
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