[dm][pinctrl] new interface for 'pin_gpio_request'

Some GPIO should apply GPIO mode by pinctrl, add `pin_ctrl_gpio_request`
for GPIO driver to apply it auto.

Signed-off-by: GuEe-GUI <[email protected]>

Author: GuEe-GUI

components/drivers/include/drivers/dev_pin.h

@@ -224,6 +224,7 @@ struct rt_pin_ops
 #endif
 #ifdef RT_USING_PINCTRL
     rt_err_t (*pin_ctrl_confs_apply)(struct rt_device *device, void *fw_conf_np);
+    rt_err_t (*pin_ctrl_gpio_request)(struct rt_device *device, rt_base_t gpio, rt_uint32_t flags);
 #endif /* RT_USING_PINCTRL */
 };
 

components/drivers/pin/dev_pin_dm.c

@@ -456,3 +456,20 @@ rt_ssize_t rt_pin_get_named_pin_count(struct rt_device *dev, const char *propnam
 
     return count;
 }
+
+#ifdef RT_USING_PINCTRL
+rt_err_t pin_gpio_request(struct rt_device_pin *pinctrl, rt_base_t gpio, rt_uint32_t flags)
+{
+    if (!pinctrl || gpio < 0)
+    {
+        return -RT_EINVAL;
+    }
+
+    if (pinctrl->ops->pin_ctrl_gpio_request)
+    {
+        return pinctrl->ops->pin_ctrl_gpio_request(&pinctrl->parent, gpio, flags);
+    }
+
+    return RT_EOK;
+}
+#endif /* RT_USING_PINCTRL */

components/drivers/pin/dev_pin_dm.h

@@ -15,9 +15,47 @@
 #include <rtthread.h>
 #include <rtdevice.h>
 
+/**
+ * Bind GPIO pin to system PIN API
+ *
+ * @param gpio Pin device
+ * @param pin_nr GPIO pin number
+ *
+ * @return RT_EOK on success, error code otherwise
+ */
 rt_err_t pin_api_init(struct rt_device_pin *gpio, rt_size_t pin_nr);
 
+/**
+ * Bind GPIO pin to system PIN PIC
+ *
+ * @param gpio Pin device
+ * @param pin_irq GPIO irqno
+ *
+ * @return RT_EOK on success, error code otherwise
+ */
 rt_err_t pin_pic_init(struct rt_device_pin *gpio, int pin_irq);
+
+/**
+ * Handle GPIO one pin's ISR
+ *
+ * @param gpio Pin device
+ * @param pin GPIO pin
+ *
+ * @return RT_EOK on success, error code otherwise
+ */
 rt_err_t pin_pic_handle_isr(struct rt_device_pin *gpio, rt_base_t pin);
 
+#ifdef RT_USING_PINCTRL
+/**
+ * Request GPIO pin configuration from pinctrl
+ *
+ * @param pinctrl Pinctrl device
+ * @param gpio GPIO pin number
+ * @param flags GPIO configuration flags
+ *
+ * @return RT_EOK on success, error code otherwise
+ */
+rt_err_t pin_gpio_request(struct rt_device_pin *pinctrl, rt_base_t gpio, rt_uint32_t flags);
+#endif
+
 #endif /* __DEV_PIN_DM_H__ */