diff options
| author | Herbert Valerio Riedel <hvr@gnu.org> | 2007-11-21 22:42:33 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2007-11-21 22:42:33 +0300 |
| commit | 6a2e391190b17f4fb895bd2d5e8b08c7c8f897a2 (patch) | |
| tree | ee5a7af733b8eef5b877614ac02886632208eda1 /drivers/input | |
| parent | 8bf4215e8a7f7416d7258af211488aabf65863c3 (diff) | |
| download | linux-6a2e391190b17f4fb895bd2d5e8b08c7c8f897a2.tar.xz | |
Input: gpio-keys - request and configure GPIOs
Currently, gpio_keys.c assumes the GPIOs to be already properly configured;
this patch changes gpio-keys to perform explicit calls to gpio_request() and
gpio_configure_input().
This matches the behaviour of leds-gpio.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/keyboard/gpio_keys.c | 38 |
1 files changed, 28 insertions, 10 deletions
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c index 3eddf52a0bba..6a9ca4bdcb74 100644 --- a/drivers/input/keyboard/gpio_keys.c +++ b/drivers/input/keyboard/gpio_keys.c @@ -75,16 +75,32 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) for (i = 0; i < pdata->nbuttons; i++) { struct gpio_keys_button *button = &pdata->buttons[i]; - int irq = gpio_to_irq(button->gpio); + int irq; unsigned int type = button->type ?: EV_KEY; + error = gpio_request(button->gpio, button->desc ?: "gpio_keys"); + if (error < 0) { + pr_err("gpio-keys: failed to request GPIO %d," + " error %d\n", button->gpio, error); + goto fail; + } + + error = gpio_direction_input(button->gpio); + if (error < 0) { + pr_err("gpio-keys: failed to configure input" + " direction for GPIO %d, error %d\n", + button->gpio, error); + gpio_free(button->gpio); + goto fail; + } + + irq = gpio_to_irq(button->gpio); if (irq < 0) { error = irq; - printk(KERN_ERR - "gpio-keys: " - "Unable to get irq number for GPIO %d," - "error %d\n", + pr_err("gpio-keys: Unable to get irq number" + " for GPIO %d, error %d\n", button->gpio, error); + gpio_free(button->gpio); goto fail; } @@ -94,9 +110,9 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) button->desc ? button->desc : "gpio_keys", pdev); if (error) { - printk(KERN_ERR - "gpio-keys: Unable to claim irq %d; error %d\n", + pr_err("gpio-keys: Unable to claim irq %d; error %d\n", irq, error); + gpio_free(button->gpio); goto fail; } @@ -108,8 +124,7 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) error = input_register_device(input); if (error) { - printk(KERN_ERR - "gpio-keys: Unable to register input device, " + pr_err("gpio-keys: Unable to register input device, " "error: %d\n", error); goto fail; } @@ -119,8 +134,10 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) return 0; fail: - while (--i >= 0) + while (--i >= 0) { free_irq(gpio_to_irq(pdata->buttons[i].gpio), pdev); + gpio_free(pdata->buttons[i].gpio); + } platform_set_drvdata(pdev, NULL); input_free_device(input); @@ -139,6 +156,7 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev) for (i = 0; i < pdata->nbuttons; i++) { int irq = gpio_to_irq(pdata->buttons[i].gpio); free_irq(irq, pdev); + gpio_free(pdata->buttons[i].gpio); } input_unregister_device(input); |