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iio: trigger: stm32-timer: add support for stm32mp25

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Add support for STM32MP25 SoC. Use newly introduced compatible to handle
this new HW variant. Add TIM20 trigger definitions that can be used by
the stm32 analog-to-digital converter. Use compatible data to identify
it.
As the counter framework is now superseding the deprecated IIO counter
interface (IIO_COUNT), don't support it. Only register IIO trigger
devices for ADC usage. So, make the valids_table a cfg option.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://patch.msgid.link/20241220095927.1122782-4-fabrice.gasnier@foss.st.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Fabrice Gasnier 2024-12-20 10:59:21 +01:00 committed by Jonathan Cameron
parent e9ed97be4f
commit e2f9d754fc
2 changed files with 25 additions and 2 deletions
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21
drivers/iio/trigger/stm32-timer-trigger.c
View File

@ -38,6 +38,9 @@ static const void *triggers_table[][MAX_TRIGGERS] = {
{ TIM15_TRGO,},
{ TIM16_OC1,},
{ TIM17_OC1,},
{ }, /* timer 18 */
{ }, /* timer 19 */
{ TIM20_TRGO, TIM20_TRGO2, TIM20_OC1, TIM20_OC2, TIM20_OC3, },
};
/* List the triggers accepted by each timer */
@ -791,7 +794,7 @@ static int stm32_timer_trigger_probe(struct platform_device *pdev)
return -EINVAL;
/* Create an IIO device only if we have triggers to be validated */
if (*cfg->valids_table[index])
if (cfg->valids_table && *cfg->valids_table[index])
priv = stm32_setup_counter_device(dev);
else
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@ -804,7 +807,8 @@ static int stm32_timer_trigger_probe(struct platform_device *pdev)
priv->clk = ddata->clk;
priv->max_arr = ddata->max_arr;
priv->triggers = triggers_table[index];
priv->valids = cfg->valids_table[index];
if (cfg->valids_table && *cfg->valids_table[index])
priv->valids = cfg->valids_table[index];
stm32_timer_detect_trgo2(priv);
mutex_init(&priv->lock);
@ -896,6 +900,16 @@ static const struct stm32_timer_trigger_cfg stm32h7_timer_trg_cfg = {
.num_valids_table = ARRAY_SIZE(stm32h7_valids_table),
};
static const struct stm32_timer_trigger_cfg stm32mp25_timer_trg_cfg = {
/*
* valids_table not used: counter framework is now superseding the deprecated IIO
* counter interface (IIO_COUNT), so don't support it. num_valids_table is only
* kept here to register the IIO HW triggers. valids_table should be moved at some
* point to the stm32-timer-cnt driver instead.
*/
.num_valids_table = ARRAY_SIZE(triggers_table),
};
static const struct of_device_id stm32_trig_of_match[] = {
{
.compatible = "st,stm32-timer-trigger",
@ -903,6 +917,9 @@ static const struct of_device_id stm32_trig_of_match[] = {
}, {
.compatible = "st,stm32h7-timer-trigger",
.data = (void *)&stm32h7_timer_trg_cfg,
}, {
.compatible = "st,stm32mp25-timer-trigger",
.data = (void *)&stm32mp25_timer_trg_cfg,
},
{ /* end node */ },
};

6
include/linux/iio/timer/stm32-timer-trigger.h
View File

@ -72,6 +72,12 @@
#define TIM17_OC1 "tim17_oc1"
#define TIM20_OC1 "tim20_oc1"
#define TIM20_OC2 "tim20_oc2"
#define TIM20_OC3 "tim20_oc3"
#define TIM20_TRGO "tim20_trgo"
#define TIM20_TRGO2 "tim20_trgo2"
#if IS_REACHABLE(CONFIG_IIO_STM32_TIMER_TRIGGER)
bool is_stm32_timer_trigger(struct iio_trigger *trig);
#else