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iio: adc: stm32: add support for lptimer triggers

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STM32 ADC supports hardware triggers like STM32 Low-Power Timer.
For instance, STM32H7 ADC may be triggered by instances 1, 2 or 3.
Add hardware triggered mode so Low-Power Timer Trigger driver can
validate device.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Fabrice Gasnier 2017-08-28 12:04:14 +02:00 committed by Lee Jones
parent d8958824cf
commit f0b638a7f6
1 changed files with 12 additions and 2 deletions
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14
drivers/iio/adc/stm32-adc.c
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@ -25,6 +25,7 @@
#include <linux/dmaengine.h>
#include <linux/iio/iio.h>
#include <linux/iio/buffer.h>
#include <linux/iio/timer/stm32-lptim-trigger.h>
#include <linux/iio/timer/stm32-timer-trigger.h>
#include <linux/iio/trigger.h>
#include <linux/iio/trigger_consumer.h>
@ -182,6 +183,11 @@ enum stm32_adc_extsel {
STM32_EXT13,
STM32_EXT14,
STM32_EXT15,
STM32_EXT16,
STM32_EXT17,
STM32_EXT18,
STM32_EXT19,
STM32_EXT20,
};
/**
@ -480,6 +486,9 @@ static struct stm32_adc_trig_info stm32h7_adc_trigs[] = {
{ TIM4_TRGO, STM32_EXT12 },
{ TIM6_TRGO, STM32_EXT13 },
{ TIM3_CH4, STM32_EXT15 },
{ LPTIM1_OUT, STM32_EXT18 },
{ LPTIM2_OUT, STM32_EXT19 },
{ LPTIM3_OUT, STM32_EXT20 },
{},
};
@ -995,7 +1004,8 @@ static int stm32_adc_get_trig_extsel(struct iio_dev *indio_dev,
* Checking both stm32 timer trigger type and trig name
* should be safe against arbitrary trigger names.
*/
if (is_stm32_timer_trigger(trig) &&
if ((is_stm32_timer_trigger(trig) ||
is_stm32_lptim_trigger(trig)) &&
!strcmp(adc->cfg->trigs[i].name, trig->name)) {
return adc->cfg->trigs[i].extsel;
}
@ -1634,7 +1644,7 @@ static int stm32_adc_probe(struct platform_device *pdev)
indio_dev->dev.parent = &pdev->dev;
indio_dev->dev.of_node = pdev->dev.of_node;
indio_dev->info = &stm32_adc_iio_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->modes = INDIO_DIRECT_MODE | INDIO_HARDWARE_TRIGGERED;
platform_set_drvdata(pdev, adc);