* @unprepare: optional unprepare routine (disable, power-down)
* @irq_clear: routine to clear irqs
* @smp_cycles: programmable sampling time (ADC clock cycles)
- * @ts_vrefint_ns: vrefint minimum sampling time in ns
+ * @ts_int_ch: pointer to array of internal channels minimum sampling time in ns
*/
struct stm32_adc_cfg {
const struct stm32_adc_regspec *regs;
void (*unprepare)(struct iio_dev *);
void (*irq_clear)(struct iio_dev *indio_dev, u32 msk);
const unsigned int *smp_cycles;
- const unsigned int ts_vrefint_ns;
+ const unsigned int *ts_int_ch;
};
/**
{
const struct stm32_adc_regs *smpr = &adc->cfg->regs->smp_bits[channel];
u32 period_ns, shift = smpr->shift, mask = smpr->mask;
- unsigned int smp, r = smpr->reg;
+ unsigned int i, smp, r = smpr->reg;
/*
- * For vrefint channel, ensure that the sampling time cannot
+ * For internal channels, ensure that the sampling time cannot
* be lower than the one specified in the datasheet
*/
- if (channel == adc->int_ch[STM32_ADC_INT_CH_VREFINT])
- smp_ns = max(smp_ns, adc->cfg->ts_vrefint_ns);
+ for (i = 0; i < STM32_ADC_INT_CH_NB; i++)
+ if (channel == adc->int_ch[i] && adc->int_ch[i] != STM32_ADC_INT_CH_NONE)
+ smp_ns = max(smp_ns, adc->cfg->ts_int_ch[i]);
/* Determine sampling time (ADC clock cycles) */
period_ns = NSEC_PER_SEC / adc->common->rate;
.irq_clear = stm32f4_adc_irq_clear,
};
+const unsigned int stm32_adc_min_ts_h7[] = { 0, 0, 0, 4300, 9000 };
+static_assert(ARRAY_SIZE(stm32_adc_min_ts_h7) == STM32_ADC_INT_CH_NB);
+
static const struct stm32_adc_cfg stm32h7_adc_cfg = {
.regs = &stm32h7_adc_regspec,
.adc_info = &stm32h7_adc_info,
.unprepare = stm32h7_adc_unprepare,
.smp_cycles = stm32h7_adc_smp_cycles,
.irq_clear = stm32h7_adc_irq_clear,
+ .ts_int_ch = stm32_adc_min_ts_h7,
};
+const unsigned int stm32_adc_min_ts_mp1[] = { 100, 100, 100, 4300, 9800 };
+static_assert(ARRAY_SIZE(stm32_adc_min_ts_mp1) == STM32_ADC_INT_CH_NB);
+
static const struct stm32_adc_cfg stm32mp1_adc_cfg = {
.regs = &stm32mp1_adc_regspec,
.adc_info = &stm32h7_adc_info,
.unprepare = stm32h7_adc_unprepare,
.smp_cycles = stm32h7_adc_smp_cycles,
.irq_clear = stm32h7_adc_irq_clear,
- .ts_vrefint_ns = 4300,
+ .ts_int_ch = stm32_adc_min_ts_mp1,
};
+const unsigned int stm32_adc_min_ts_mp13[] = { 100, 0, 0, 4300, 9800 };
+static_assert(ARRAY_SIZE(stm32_adc_min_ts_mp13) == STM32_ADC_INT_CH_NB);
+
static const struct stm32_adc_cfg stm32mp13_adc_cfg = {
.regs = &stm32mp13_adc_regspec,
.adc_info = &stm32mp13_adc_info,
.unprepare = stm32h7_adc_unprepare,
.smp_cycles = stm32mp13_adc_smp_cycles,
.irq_clear = stm32h7_adc_irq_clear,
+ .ts_int_ch = stm32_adc_min_ts_mp13,
};
static const struct of_device_id stm32_adc_of_match[] = {