Function gpio_get_drive_capability

pub unsafe extern "C" fn gpio_get_drive_capability(
    gpio_num: i32,
    strength: *mut u32,
) -> i32

@brief Get GPIO pad drive capability

@param gpio_num GPIO number, only support output GPIOs @param strength Pointer to accept drive capability of the pad

@return - ESP_OK Success - ESP_ERR_INVALID_ARG Parameter error