RP1_GPIO_CTRL_FUNCSEL
[RP1_GPIO_CTRL_FUNCSEL] = REG_FIELD(0x0004, 0, 4),
regmap_field_read(pin->gpio[RP1_GPIO_CTRL_FUNCSEL], &fsel);
regmap_field_write(pin->gpio[RP1_GPIO_CTRL_FUNCSEL], fsel);