[PATCH v3 09/15] iio: adc: stm32-adc: add support for stm32mp23

[Joshua Crofts]

On Wed, 30 Sep 2026 16:18:30 +0200
Fabrice Gasnier <fabrice.gasnier at foss.st.com> wrote:

> Add support for ADC on STM32MP23 SoC. It has 3 ADCs, split into two blocks:
> - ADC1 & ADC2 are tightly coupled.
> - ADC3 is managed independently.
> 
> It is quite similar to STM32MP25 ADC, except for the trigger list. TIM20
> triggers have been removed. So, handle the differences with a dedicated
> compatible and compatible data.
> 
> Co-developed-by: Cheick Traore <cheick.traore-ext at st.com>
> Signed-off-by: Cheick Traore <cheick.traore-ext at st.com>
> Co-developed-by: Olivier Moysan <olivier.moysan at foss.st.com>
> Signed-off-by: Olivier Moysan <olivier.moysan at foss.st.com>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier at foss.st.com>
> ---
> Changes in v3:
> - Style: Wrap core ID table to 100 chars.
> 
> Changes in v2:
> - New patch, split as advised by Andy: one patch for this new SoC
> ---
>  drivers/iio/adc/stm32-adc-core.c |   1 +
>  drivers/iio/adc/stm32-adc.c      | 112 +++++++++++++++++++++++++++++++++++++++
>  2 files changed, 113 insertions(+)
> 
> diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
> index bb8b53f52914..f94cc6fe4c02 100644
> --- a/drivers/iio/adc/stm32-adc-core.c
> +++ b/drivers/iio/adc/stm32-adc-core.c
> @@ -936,6 +936,7 @@ static const struct of_device_id stm32_adc_of_match[] = {
>  	{ .compatible = "st,stm32h7-adc-core", .data = (void *)&stm32h7_adc_priv_cfg },
>  	{ .compatible = "st,stm32mp1-adc-core",	.data = (void *)&stm32mp1_adc_priv_cfg },
>  	{ .compatible = "st,stm32mp13-adc-core", .data = (void *)&stm32mp13_adc_priv_cfg },
> +	{ .compatible = "st,stm32mp23-adc-core", .data = (void *)&stm32mp25_adc_priv_cfg },
>  	{ .compatible = "st,stm32mp25-adc-core", .data = (void *)&stm32mp25_adc_priv_cfg },
>  	{ }
>  };
> diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
> index 33e41505b2e9..210b76b21d13 100644
> --- a/drivers/iio/adc/stm32-adc.c
> +++ b/drivers/iio/adc/stm32-adc.c
> @@ -563,6 +563,64 @@ static const struct stm32_adc_regspec stm32h7_adc_regspec = {
>  	.smp_bits = stm32h7_smp_bits,
>  };
>  
> +/* STM32MP23 external trigger sources for ADC1 and ADC2 */
> +static struct stm32_adc_trig_info stm32mp23_adc1_adc2_trigs[] = {

This should be const, the trigs field is marked const in stm32_adc_cfg.

> +	{ TIM1_TRGO, STM32_EXT0 },
> +	{ TIM1_TRGO2, STM32_EXT1 },
> +	{ TIM8_TRGO, STM32_EXT2 },
> +	{ TIM8_TRGO2, STM32_EXT3 },
> +	{ TIM2_TRGO, STM32_EXT6 },
> +	{ TIM3_TRGO, STM32_EXT7 },
> +	{ TIM4_TRGO, STM32_EXT8 },
> +	{ TIM5_TRGO, STM32_EXT9 },
> +	{ TIM6_TRGO, STM32_EXT10 },
> +	{ TIM15_TRGO, STM32_EXT11 },
> +	{ TIM1_CH1, STM32_EXT12 },
> +	{ TIM1_CH2, STM32_EXT13 },
> +	{ TIM1_CH3, STM32_EXT14 },
> +	{ TIM2_CH2, STM32_EXT18 },
> +	{ TIM3_CH4, STM32_EXT19 },
> +	{ TIM4_CH4, STM32_EXT20 },
> +	{ TIM5_CH1, STM32_EXT21 },
> +	{ TIM12_CH1, STM32_EXT22 },
> +	{ LPTIM1_CH1, STM32_EXT24 },
> +	{ LPTIM2_CH1, STM32_EXT25 },
> +	{ LPTIM3_CH1, STM32_EXT26 },
> +	{ LPTIM4_CH1, STM32_EXT27 },
> +	{ LPTIM5_OUT, STM32_EXT28 },
> +	{ }
> +};
> +
> +/* STM32MP23 external trigger sources for ADC3 */
> +static struct stm32_adc_trig_info stm32mp23_adc3_trigs[] = {

Same here.

-- 
Kind regards,
Joshua Crofts