[PATCH v2 08/14] iio: adc: stm32-adc: add support for stm32mp23
Fabrice Gasnier
fabrice.gasnier at foss.st.com
Wed Sep 23 08:39:11 PDT 2026
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 v2:
- New patch, split as advised by Andy: one patch for this new SoC
---
drivers/iio/adc/stm32-adc-core.c | 3 ++
drivers/iio/adc/stm32-adc.c | 112 +++++++++++++++++++++++++++++++++++++++
2 files changed, 115 insertions(+)
diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index 7027d86f7457..418846f736ba 100644
--- a/drivers/iio/adc/stm32-adc-core.c
+++ b/drivers/iio/adc/stm32-adc-core.c
@@ -948,6 +948,9 @@ static const struct of_device_id stm32_adc_of_match[] = {
}, {
.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 a5bffc09898b..a14f858299ae 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[] = {
+ { 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[] = {
+ { 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 },
+ { TIM7_TRGO, STM32_EXT11 },
+ { TIM15_TRGO, STM32_EXT12 },
+ { TIM17_OC1, STM32_EXT13 },
+ { TIM1_CH3, STM32_EXT14 },
+ { TIM8_CH1, STM32_EXT15 },
+ { TIM2_CH1, STM32_EXT17 },
+ { TIM2_CH3, STM32_EXT18 },
+ { TIM3_CH1, STM32_EXT19 },
+ { TIM4_CH1, STM32_EXT20 },
+ { TIM5_CH3, 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 },
+ { }
+};
+
/* STM32MP25 external trigger sources for ADC1 and ADC2 */
static struct stm32_adc_trig_info stm32mp25_adc1_adc2_trigs[] = {
{ TIM1_TRGO, STM32_EXT0 },
@@ -3104,6 +3162,57 @@ static const unsigned int stm32_adc_min_ts_mp25[STM32_ADC_INT_CH_NB] = {
[STM32_ADC_INT_CH_VBAT] = 34,
};
+static const struct stm32_adc_cfg stm32mp23_adc1_cfg = {
+ .regs = &stm32mp25_adc1_regspec,
+ .adc_info = &stm32mp25_adc_info,
+ .trigs = stm32mp23_adc1_adc2_trigs,
+ .has_oversampling = true,
+ .has_presel = true,
+ .start_conv = stm32h7_adc_start_conv,
+ .stop_conv = stm32h7_adc_stop_conv,
+ .prepare = stm32mp25_adc_prepare,
+ .unprepare = stm32mp25_adc_unprepare,
+ .smp_cycles = stm32mp25_adc_smp_cycles,
+ .irq_clear = stm32h7_adc_irq_clear,
+ .set_ovs = stm32h7_adc_set_ovs,
+ .ts_int_ch = stm32_adc_min_ts_mp25,
+ .vref_charac_mv = 1800,
+};
+
+static const struct stm32_adc_cfg stm32mp23_adc2_cfg = {
+ .regs = &stm32mp25_adc2_adc3_regspec,
+ .adc_info = &stm32mp25_adc_info,
+ .trigs = stm32mp23_adc1_adc2_trigs,
+ .has_oversampling = true,
+ .has_presel = true,
+ .start_conv = stm32h7_adc_start_conv,
+ .stop_conv = stm32h7_adc_stop_conv,
+ .prepare = stm32mp25_adc_prepare,
+ .unprepare = stm32mp25_adc_unprepare,
+ .smp_cycles = stm32mp25_adc_smp_cycles,
+ .irq_clear = stm32h7_adc_irq_clear,
+ .set_ovs = stm32h7_adc_set_ovs,
+ .ts_int_ch = stm32_adc_min_ts_mp25,
+ .vref_charac_mv = 1800,
+};
+
+static const struct stm32_adc_cfg stm32mp23_adc3_cfg = {
+ .regs = &stm32mp25_adc2_adc3_regspec,
+ .adc_info = &stm32mp25_adc_info,
+ .trigs = stm32mp23_adc3_trigs,
+ .has_oversampling = true,
+ .has_presel = true,
+ .start_conv = stm32h7_adc_start_conv,
+ .stop_conv = stm32h7_adc_stop_conv,
+ .prepare = stm32mp25_adc_prepare,
+ .unprepare = stm32mp25_adc_unprepare,
+ .smp_cycles = stm32mp25_adc_smp_cycles,
+ .irq_clear = stm32h7_adc_irq_clear,
+ .set_ovs = stm32h7_adc_set_ovs,
+ .ts_int_ch = stm32_adc_min_ts_mp25,
+ .vref_charac_mv = 1800,
+};
+
static const struct stm32_adc_cfg stm32mp25_adc1_cfg = {
.regs = &stm32mp25_adc1_regspec,
.adc_info = &stm32mp25_adc_info,
@@ -3160,6 +3269,9 @@ static const struct of_device_id stm32_adc_of_match[] = {
{ .compatible = "st,stm32h7-adc", .data = (void *)&stm32h7_adc_cfg },
{ .compatible = "st,stm32mp1-adc", .data = (void *)&stm32mp1_adc_cfg },
{ .compatible = "st,stm32mp13-adc", .data = (void *)&stm32mp13_adc_cfg },
+ { .compatible = "st,stm32mp23-adc1", .data = (void *)&stm32mp23_adc1_cfg },
+ { .compatible = "st,stm32mp23-adc2", .data = (void *)&stm32mp23_adc2_cfg },
+ { .compatible = "st,stm32mp23-adc3", .data = (void *)&stm32mp23_adc3_cfg },
{ .compatible = "st,stm32mp25-adc1", .data = (void *)&stm32mp25_adc1_cfg },
{ .compatible = "st,stm32mp25-adc2", .data = (void *)&stm32mp25_adc2_cfg },
{ .compatible = "st,stm32mp25-adc3", .data = (void *)&stm32mp25_adc3_cfg },
--
2.43.0
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