extcon: gpio: Use descriptor-based GPIO interface instead of legacy gpio_* API
This patch uses the descriptor-based GPIO interface (gpiod_* API) instead of
legacy gpio_* API and add the internal gpio_extcon_init() to handle
all gpio-related tasks.
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
index 27de6ae..279ff8f 100644
--- a/drivers/extcon/extcon-gpio.c
+++ b/drivers/extcon/extcon-gpio.c
@@ -20,6 +20,7 @@
#include <linux/extcon.h>
#include <linux/extcon/extcon-gpio.h>
#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@@ -34,6 +35,7 @@
struct delayed_work work;
unsigned long debounce_jiffies;
+ struct gpio_desc *id_gpiod;
struct gpio_extcon_pdata *pdata;
};
@@ -44,7 +46,7 @@
container_of(to_delayed_work(work), struct gpio_extcon_data,
work);
- state = gpio_get_value(data->pdata->gpio);
+ state = gpiod_get_value_cansleep(data->id_gpiod);
if (data->pdata->gpio_active_low)
state = !state;
extcon_set_state(data->edev, state);
@@ -59,6 +61,35 @@
return IRQ_HANDLED;
}
+static int gpio_extcon_init(struct device *dev, struct gpio_extcon_data *data)
+{
+ struct gpio_extcon_pdata *pdata = data->pdata;
+ int ret;
+
+ ret = devm_gpio_request_one(dev, pdata->gpio, GPIOF_DIR_IN,
+ dev_name(dev));
+ if (ret < 0)
+ return ret;
+
+ data->id_gpiod = gpio_to_desc(pdata->gpio);
+ if (!data->id_gpiod)
+ return -EINVAL;
+
+ if (pdata->debounce) {
+ ret = gpiod_set_debounce(data->id_gpiod,
+ pdata->debounce * 1000);
+ if (ret < 0)
+ data->debounce_jiffies =
+ msecs_to_jiffies(pdata->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_pdata *pdata = dev_get_platdata(&pdev->dev);
@@ -74,26 +105,19 @@
GFP_KERNEL);
if (!data)
return -ENOMEM;
+ data->pdata = pdata;
+ /* Initialize the gpio */
+ ret = gpio_extcon_init(&pdev->dev, data);
+ if (ret < 0)
+ return ret;
+
+ /* Allocate the memory of extcon devie and register extcon device */
data->edev = devm_extcon_dev_allocate(&pdev->dev, &pdata->extcon_id);
if (IS_ERR(data->edev)) {
dev_err(&pdev->dev, "failed to allocate extcon device\n");
return -ENOMEM;
}
- data->pdata = pdata;
-
- ret = devm_gpio_request_one(&pdev->dev, data->pdata->gpio, GPIOF_DIR_IN,
- pdev->name);
- if (ret < 0)
- return ret;
-
- if (pdata->debounce) {
- ret = gpio_set_debounce(data->pdata->gpio,
- pdata->debounce * 1000);
- if (ret < 0)
- data->debounce_jiffies =
- msecs_to_jiffies(pdata->debounce);
- }
ret = devm_extcon_dev_register(&pdev->dev, data->edev);
if (ret < 0)
@@ -101,10 +125,10 @@
INIT_DELAYED_WORK(&data->work, gpio_extcon_work);
- data->irq = gpio_to_irq(data->pdata->gpio);
- if (data->irq < 0)
- return data->irq;
-
+ /*
+ * Request the interrput of gpio to detect whether external connector
+ * is attached or detached.
+ */
ret = devm_request_any_context_irq(&pdev->dev, data->irq,
gpio_irq_handler, pdata->irq_flags,
pdev->name, data);