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Input: gpio-keys - request and configure GPIOs

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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>
This commit is contained in:
Herbert Valerio Riedel 2007-11-21 14:42:33 -05:00 committed by Dmitry Torokhov
parent 8bf4215e8a
commit 6a2e391190
1 changed files with 28 additions and 10 deletions
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38
drivers/input/keyboard/gpio_keys.c
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@ -75,16 +75,32 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
for (i = 0; i < pdata->nbuttons; i++) { for (i = 0; i < pdata->nbuttons; i++) {
struct gpio_keys_button *button = &pdata->buttons[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; 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) { if (irq < 0) {
error = irq; error = irq;
printk(KERN_ERR pr_err("gpio-keys: Unable to get irq number"
"gpio-keys: " " for GPIO %d, error %d\n",
"Unable to get irq number for GPIO %d,"
"error %d\n",
button->gpio, error); button->gpio, error);
gpio_free(button->gpio);
goto fail; goto fail;
} }
@ -94,9 +110,9 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
button->desc ? button->desc : "gpio_keys", button->desc ? button->desc : "gpio_keys",
pdev); pdev);
if (error) { if (error) {
printk(KERN_ERR pr_err("gpio-keys: Unable to claim irq %d; error %d\n",
"gpio-keys: Unable to claim irq %d; error %d\n",
irq, error); irq, error);
gpio_free(button->gpio);
goto fail; goto fail;
} }
@ -108,8 +124,7 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
error = input_register_device(input); error = input_register_device(input);
if (error) { if (error) {
printk(KERN_ERR pr_err("gpio-keys: Unable to register input device, "
"gpio-keys: Unable to register input device, "
"error: %d\n", error); "error: %d\n", error);
goto fail; goto fail;
} }
@ -119,8 +134,10 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
return 0; return 0;
fail: fail:
while (--i >= 0) while (--i >= 0) {
free_irq(gpio_to_irq(pdata->buttons[i].gpio), pdev); free_irq(gpio_to_irq(pdata->buttons[i].gpio), pdev);
gpio_free(pdata->buttons[i].gpio);
}
platform_set_drvdata(pdev, NULL); platform_set_drvdata(pdev, NULL);
input_free_device(input); 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++) { for (i = 0; i < pdata->nbuttons; i++) {
int irq = gpio_to_irq(pdata->buttons[i].gpio); int irq = gpio_to_irq(pdata->buttons[i].gpio);
free_irq(irq, pdev); free_irq(irq, pdev);
gpio_free(pdata->buttons[i].gpio);
} }
input_unregister_device(input); input_unregister_device(input);