From: Guenter Roeck Date: Fri, 22 Nov 2013 17:26:01 +0000 (-0800) Subject: extcon: gpio: Request gpio pin before modifying its state X-Git-Tag: upstream/snapshot3+hdmi~3630^2~4^2~11 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4288d9b8edcec7289e00eecdad44f14c9ea1ba0e;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git extcon: gpio: Request gpio pin before modifying its state Commit 338de0ca (extcon: gpio: Use gpio driver/chip debounce if supported) introduced a call to gpio_set_debounce() before actually requesting the respective gpio pin from the gpio subsystem. The gpio subsystem expects that a gpio pin was requested before modifying its state. Not doing so results in a warning from gpiolib, and the gpio pin is auto-requested. This in turn causes the subsequent devm_gpio_request_one() to fail. So devm_gpio_request_one() must be called prior to calling gpio_set_debounce(). Signed-off-by: Guenter Roeck Acked-by: MyungJoo Ham Signed-off-by: Chanwoo Choi --- diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c index 7e0dff5..4736a9c 100644 --- a/drivers/extcon/extcon-gpio.c +++ b/drivers/extcon/extcon-gpio.c @@ -105,6 +105,12 @@ static int gpio_extcon_probe(struct platform_device *pdev) extcon_data->state_off = pdata->state_off; if (pdata->state_on && pdata->state_off) extcon_data->edev.print_state = extcon_gpio_print_state; + + ret = devm_gpio_request_one(&pdev->dev, extcon_data->gpio, GPIOF_DIR_IN, + pdev->name); + if (ret < 0) + return ret; + if (pdata->debounce) { ret = gpio_set_debounce(extcon_data->gpio, pdata->debounce * 1000); @@ -117,11 +123,6 @@ static int gpio_extcon_probe(struct platform_device *pdev) if (ret < 0) return ret; - ret = devm_gpio_request_one(&pdev->dev, extcon_data->gpio, GPIOF_DIR_IN, - pdev->name); - if (ret < 0) - goto err; - INIT_DELAYED_WORK(&extcon_data->work, gpio_extcon_work); extcon_data->irq = gpio_to_irq(extcon_data->gpio);