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extcon: gpio: update power management operations

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During system resume, other subsystem may need to get the extcon state to
decide if a hotplug device is present. So we need to make sure the extcon
gpio device resumes early and update its state in a sync way.

Change-Id: Id5c4e8c8c7e9196fea8fa8eecb42dfb4914aeb7b
Signed-off-by: Can Guo <cang@codeaurora.org>
This commit is contained in:
Can Guo
2019-05-27 08:13:46 +08:00
parent b53cdddc15
commit a3d39568ec
1 changed files with 21 additions and 7 deletions
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28
drivers/extcon/extcon-gpio.c
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@@ -178,6 +178,8 @@ static int gpio_extcon_probe(struct platform_device *pdev)
if (data->irq <= 0) if (data->irq <= 0)
return data->irq; return data->irq;
data->check_on_resume = true;
data->supported_cable = devm_kzalloc(dev, data->supported_cable = devm_kzalloc(dev,
sizeof(*data->supported_cable) * 2, sizeof(*data->supported_cable) * 2,
GFP_KERNEL); GFP_KERNEL);
@@ -229,17 +231,29 @@ static int gpio_extcon_remove(struct platform_device *pdev)
static int gpio_extcon_resume(struct device *dev) static int gpio_extcon_resume(struct device *dev)
{ {
struct gpio_extcon_data *data; struct gpio_extcon_data *data;
int state, ret = 0;
data = dev_get_drvdata(dev); data = dev_get_drvdata(dev);
if (data->check_on_resume) if (data->check_on_resume) {
queue_delayed_work(system_power_efficient_wq, state = gpiod_get_value_cansleep(data->gpiod);
&data->work, data->debounce_jiffies); ret = extcon_set_state_sync(data->edev, data->extcon_id, state);
if (ret)
dev_err(dev, "%s: Failed to set extcon gpio state\n",
__func__);
}
return 0; return ret;
} }
#endif
static SIMPLE_DEV_PM_OPS(gpio_extcon_pm_ops, NULL, gpio_extcon_resume); static const struct dev_pm_ops gpio_extcon_pm_ops = {
SET_LATE_SYSTEM_SLEEP_PM_OPS(NULL, gpio_extcon_resume)
};
#define EXTCON_GPIO_PMOPS (&gpio_extcon_pm_ops)
#else
#define EXTCON_GPIO_PMOPS NULL
#endif
static const struct of_device_id extcon_gpio_of_match[] = { static const struct of_device_id extcon_gpio_of_match[] = {
{ .compatible = "extcon-gpio"}, { .compatible = "extcon-gpio"},
@@ -251,7 +265,7 @@ static struct platform_driver gpio_extcon_driver = {
.remove = gpio_extcon_remove, .remove = gpio_extcon_remove,
.driver = { .driver = {
.name = "extcon-gpio", .name = "extcon-gpio",
.pm = &gpio_extcon_pm_ops, .pm = EXTCON_GPIO_PMOPS,
.of_match_table = of_match_ptr(extcon_gpio_of_match), .of_match_table = of_match_ptr(extcon_gpio_of_match),
}, },
}; };