linux-4.4.1/pinctrl_get_device_gpio_range() の履歴(No.1)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• linux-4.4.1/pinctrl_get_device_gpio_range() へ行く。
  • 1 (2016-05-19 (木) 10:19:47)

参照元†

• linux-4.4.1/pinctrl_request_gpio()

説明†

• パス: linux-4.4.1/drivers/pinctrl/core.c

• FIXME: これは何？
  • 説明

引数†

• unsigned gpio
• struct pinctrl_dev **outdev
  • linux-4.4.1/pinctrl_dev
• struct pinctrl_gpio_range **outrange
  • linux-4.4.1/pinctrl_gpio_range

返り値†

• int

参考†

実装†

/**
 * pinctrl_get_device_gpio_range() - find device for GPIO range
 * @gpio: the pin to locate the pin controller for
 * @outdev: the pin control device if found
 * @outrange: the GPIO range if found
 *
 * Find the pin controller handling a certain GPIO pin from the pinspace of
 * the GPIO subsystem, return the device and the matching GPIO range. Returns
 * -EPROBE_DEFER if the GPIO range could not be found in any device since it
 * may still have not been registered.
 */
static int pinctrl_get_device_gpio_range(unsigned gpio,
                                         struct pinctrl_dev **outdev,
                                         struct pinctrl_gpio_range **outrange)
{
        struct pinctrl_dev *pctldev = NULL;

• • linux-4.4.1/pinctrl_dev

        mutex_lock(&pinctrldev_list_mutex);

• • linux-4.4.1/mutex_lock()
  • linux-4.4.1/pinctrldev_list_mutex(global)

        /* Loop over the pin controllers */
        list_for_each_entry(pctldev, &pinctrldev_list, node) {
                struct pinctrl_gpio_range *range;

• • linux-4.4.1/list_for_each_entry()
  • linux-4.4.1/pinctrldev_list(global)
  • linux-4.4.1/pinctrl_gpio_range

                range = pinctrl_match_gpio_range(pctldev, gpio);
                if (range != NULL) {
                        *outdev = pctldev;
                        *outrange = range;
                        mutex_unlock(&pinctrldev_list_mutex);
                        return 0;
                }

• • linux-4.4.1/pinctrl_match_gpio_range()
  • linux-4.4.1/mutex_unlock()

        }

        mutex_unlock(&pinctrldev_list_mutex);

        return -EPROBE_DEFER;
}

コメント†