5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx> commit 27b6aa68a68105086aef9f0cb541cd688e5edea8 upstream. This driver makes use of regmap_mmio, but does not select the required module. Add the missing 'select REGMAP_MMIO'. Fixes: 4d4b30526eb8 ("iio: dac: add support for stm32 DAC") Signed-off-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx> Link: https://patch.msgid.link/20241003-ad2s1210-select-v1-8-4019453f8c33@xxxxxxxxx Cc: <Stable@xxxxxxxxxxxxxxx> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/iio/dac/Kconfig | 1 + 1 file changed, 1 insertion(+) --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -347,6 +347,7 @@ config STM32_DAC config STM32_DAC_CORE tristate + select REGMAP_MMIO config TI_DAC082S085 tristate "Texas Instruments 8/10/12-bit 2/4-channel DAC driver"