diff options
Diffstat (limited to 'drivers/input/keyboard/gpio_keys.c')
| -rw-r--r-- | drivers/input/keyboard/gpio_keys.c | 103 |
1 files changed, 68 insertions, 35 deletions
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c index 6a68041c261d..b29ca651a395 100644 --- a/drivers/input/keyboard/gpio_keys.c +++ b/drivers/input/keyboard/gpio_keys.c @@ -423,10 +423,10 @@ out: return IRQ_HANDLED; } -static int __devinit gpio_keys_setup_key(struct platform_device *pdev, - struct input_dev *input, - struct gpio_button_data *bdata, - const struct gpio_keys_button *button) +static int gpio_keys_setup_key(struct platform_device *pdev, + struct input_dev *input, + struct gpio_button_data *bdata, + const struct gpio_keys_button *button) { const char *desc = button->desc ? button->desc : "gpio_keys"; struct device *dev = &pdev->dev; @@ -440,21 +440,13 @@ static int __devinit gpio_keys_setup_key(struct platform_device *pdev, if (gpio_is_valid(button->gpio)) { - error = gpio_request(button->gpio, desc); + error = gpio_request_one(button->gpio, GPIOF_IN, desc); if (error < 0) { dev_err(dev, "Failed to request GPIO %d, error %d\n", button->gpio, error); return error; } - error = gpio_direction_input(button->gpio); - if (error < 0) { - dev_err(dev, - "Failed to configure direction for GPIO %d, error %d\n", - button->gpio, error); - goto fail; - } - if (button->debounce_interval) { error = gpio_set_debounce(button->gpio, button->debounce_interval * 1000); @@ -526,12 +518,35 @@ fail: return error; } +static void gpio_keys_report_state(struct gpio_keys_drvdata *ddata) +{ + struct input_dev *input = ddata->input; + int i; + + for (i = 0; i < ddata->pdata->nbuttons; i++) { + struct gpio_button_data *bdata = &ddata->data[i]; + if (gpio_is_valid(bdata->button->gpio)) + gpio_keys_gpio_report_event(bdata); + } + input_sync(input); +} + static int gpio_keys_open(struct input_dev *input) { struct gpio_keys_drvdata *ddata = input_get_drvdata(input); const struct gpio_keys_platform_data *pdata = ddata->pdata; + int error; - return pdata->enable ? pdata->enable(input->dev.parent) : 0; + if (pdata->enable) { + error = pdata->enable(input->dev.parent); + if (error) + return error; + } + + /* Report current state of buttons that are connected to GPIOs */ + gpio_keys_report_state(ddata); + + return 0; } static void gpio_keys_close(struct input_dev *input) @@ -551,7 +566,7 @@ static void gpio_keys_close(struct input_dev *input) /* * Translate OpenFirmware node properties into platform_data */ -static struct gpio_keys_platform_data * __devinit +static struct gpio_keys_platform_data * gpio_keys_get_devtree_pdata(struct device *dev) { struct device_node *node, *pp; @@ -587,6 +602,7 @@ gpio_keys_get_devtree_pdata(struct device *dev) i = 0; for_each_child_of_node(node, pp) { + int gpio; enum of_gpio_flags flags; if (!of_find_property(pp, "gpios", NULL)) { @@ -595,9 +611,19 @@ gpio_keys_get_devtree_pdata(struct device *dev) continue; } + gpio = of_get_gpio_flags(pp, 0, &flags); + if (gpio < 0) { + error = gpio; + if (error != -EPROBE_DEFER) + dev_err(dev, + "Failed to get gpio flags, error: %d\n", + error); + goto err_free_pdata; + } + button = &pdata->buttons[i++]; - button->gpio = of_get_gpio_flags(pp, 0, &flags); + button->gpio = gpio; button->active_low = flags & OF_GPIO_ACTIVE_LOW; if (of_property_read_u32(pp, "linux,code", &button->code)) { @@ -658,7 +684,7 @@ static void gpio_remove_key(struct gpio_button_data *bdata) gpio_free(bdata->button->gpio); } -static int __devinit gpio_keys_probe(struct platform_device *pdev) +static int gpio_keys_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; const struct gpio_keys_platform_data *pdata = dev_get_platdata(dev); @@ -731,14 +757,6 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) goto fail3; } - /* get current state of buttons that are connected to GPIOs */ - for (i = 0; i < pdata->nbuttons; i++) { - struct gpio_button_data *bdata = &ddata->data[i]; - if (gpio_is_valid(bdata->button->gpio)) - gpio_keys_gpio_report_event(bdata); - } - input_sync(input); - device_init_wakeup(&pdev->dev, wakeup); return 0; @@ -760,7 +778,7 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) return error; } -static int __devexit gpio_keys_remove(struct platform_device *pdev) +static int gpio_keys_remove(struct platform_device *pdev) { struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); struct input_dev *input = ddata->input; @@ -788,6 +806,7 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev) static int gpio_keys_suspend(struct device *dev) { struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev); + struct input_dev *input = ddata->input; int i; if (device_may_wakeup(dev)) { @@ -796,6 +815,11 @@ static int gpio_keys_suspend(struct device *dev) if (bdata->button->wakeup) enable_irq_wake(bdata->irq); } + } else { + mutex_lock(&input->mutex); + if (input->users) + gpio_keys_close(input); + mutex_unlock(&input->mutex); } return 0; @@ -804,18 +828,27 @@ static int gpio_keys_suspend(struct device *dev) static int gpio_keys_resume(struct device *dev) { struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev); + struct input_dev *input = ddata->input; + int error = 0; int i; - for (i = 0; i < ddata->pdata->nbuttons; i++) { - struct gpio_button_data *bdata = &ddata->data[i]; - if (bdata->button->wakeup && device_may_wakeup(dev)) - disable_irq_wake(bdata->irq); - - if (gpio_is_valid(bdata->button->gpio)) - gpio_keys_gpio_report_event(bdata); + if (device_may_wakeup(dev)) { + for (i = 0; i < ddata->pdata->nbuttons; i++) { + struct gpio_button_data *bdata = &ddata->data[i]; + if (bdata->button->wakeup) + disable_irq_wake(bdata->irq); + } + } else { + mutex_lock(&input->mutex); + if (input->users) + error = gpio_keys_open(input); + mutex_unlock(&input->mutex); } - input_sync(ddata->input); + if (error) + return error; + + gpio_keys_report_state(ddata); return 0; } #endif @@ -824,7 +857,7 @@ static SIMPLE_DEV_PM_OPS(gpio_keys_pm_ops, gpio_keys_suspend, gpio_keys_resume); static struct platform_driver gpio_keys_device_driver = { .probe = gpio_keys_probe, - .remove = __devexit_p(gpio_keys_remove), + .remove = gpio_keys_remove, .driver = { .name = "gpio-keys", .owner = THIS_MODULE, |