diff options
Diffstat (limited to 'drivers/extcon/extcon-gpio.c')
| -rw-r--r-- | drivers/extcon/extcon-gpio.c | 66 |
1 files changed, 15 insertions, 51 deletions
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c index b54499771e2b..13ba3a6e81d5 100644 --- a/drivers/extcon/extcon-gpio.c +++ b/drivers/extcon/extcon-gpio.c @@ -18,7 +18,6 @@ */ #include <linux/extcon-provider.h> -#include <linux/gpio.h> #include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/interrupt.h> @@ -35,12 +34,8 @@ * @work: Work fired by the interrupt. * @debounce_jiffies: Number of jiffies to wait for the GPIO to stabilize, from the debounce * value. - * @id_gpiod: GPIO descriptor for this external connector. + * @gpiod: GPIO descriptor for this external connector. * @extcon_id: The unique id of specific external connector. - * @gpio: Corresponding GPIO. - * @gpio_active_low: Boolean describing whether gpio active state is 1 or 0 - * If true, low state of gpio means active. - * If false, high state of gpio means active. * @debounce: Debounce time for GPIO IRQ in ms. * @irq_flags: IRQ Flags (e.g., IRQF_TRIGGER_LOW). * @check_on_resume: Boolean describing whether to check the state of gpio @@ -51,10 +46,8 @@ struct gpio_extcon_data { int irq; struct delayed_work work; unsigned long debounce_jiffies; - struct gpio_desc *id_gpiod; + struct gpio_desc *gpiod; unsigned int extcon_id; - unsigned gpio; - bool gpio_active_low; unsigned long debounce; unsigned long irq_flags; bool check_on_resume; @@ -67,10 +60,7 @@ static void gpio_extcon_work(struct work_struct *work) container_of(to_delayed_work(work), struct gpio_extcon_data, work); - state = gpiod_get_value_cansleep(data->id_gpiod); - if (data->gpio_active_low) - state = !state; - + state = gpiod_get_value_cansleep(data->gpiod); extcon_set_state_sync(data->edev, data->extcon_id, state); } @@ -83,41 +73,13 @@ static irqreturn_t gpio_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } -static int gpio_extcon_init(struct device *dev, struct gpio_extcon_data *data) -{ - int ret; - - ret = devm_gpio_request_one(dev, data->gpio, GPIOF_DIR_IN, - dev_name(dev)); - if (ret < 0) - return ret; - - data->id_gpiod = gpio_to_desc(data->gpio); - if (!data->id_gpiod) - return -EINVAL; - - if (data->debounce) { - ret = gpiod_set_debounce(data->id_gpiod, - data->debounce * 1000); - if (ret < 0) - data->debounce_jiffies = - msecs_to_jiffies(data->debounce); - } - - data->irq = gpiod_to_irq(data->id_gpiod); - if (data->irq < 0) - return data->irq; - - return 0; -} - static int gpio_extcon_probe(struct platform_device *pdev) { struct gpio_extcon_data *data; + struct device *dev = &pdev->dev; int ret; - data = devm_kzalloc(&pdev->dev, sizeof(struct gpio_extcon_data), - GFP_KERNEL); + data = devm_kzalloc(dev, sizeof(struct gpio_extcon_data), GFP_KERNEL); if (!data) return -ENOMEM; @@ -131,19 +93,21 @@ static int gpio_extcon_probe(struct platform_device *pdev) if (!data->irq_flags || data->extcon_id > EXTCON_NONE) return -EINVAL; - /* Initialize the gpio */ - ret = gpio_extcon_init(&pdev->dev, data); - if (ret < 0) - return ret; + data->gpiod = devm_gpiod_get(dev, "extcon", GPIOD_IN); + if (IS_ERR(data->gpiod)) + return PTR_ERR(data->gpiod); + data->irq = gpiod_to_irq(data->gpiod); + if (data->irq <= 0) + return data->irq; /* Allocate the memory of extcon devie and register extcon device */ - data->edev = devm_extcon_dev_allocate(&pdev->dev, &data->extcon_id); + data->edev = devm_extcon_dev_allocate(dev, &data->extcon_id); if (IS_ERR(data->edev)) { - dev_err(&pdev->dev, "failed to allocate extcon device\n"); + dev_err(dev, "failed to allocate extcon device\n"); return -ENOMEM; } - ret = devm_extcon_dev_register(&pdev->dev, data->edev); + ret = devm_extcon_dev_register(dev, data->edev); if (ret < 0) return ret; @@ -153,7 +117,7 @@ static int gpio_extcon_probe(struct platform_device *pdev) * Request the interrupt of gpio to detect whether external connector * is attached or detached. */ - ret = devm_request_any_context_irq(&pdev->dev, data->irq, + ret = devm_request_any_context_irq(dev, data->irq, gpio_irq_handler, data->irq_flags, pdev->name, data); if (ret < 0) |