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Commit f0b638a7 authored by Fabrice Gasnier's avatar Fabrice Gasnier Committed by Lee Jones
Browse files

iio: adc: stm32: add support for lptimer triggers 



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: default avatarFabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: default avatarJonathan Cameron <jic23@kernel.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent d8958824

drivers/iio/adc/stm32-adc.c

+12 −2
Original line number Original line Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <linux/dmaengine.h>

#include <linux/dmaengine.h>

#include <linux/iio/iio.h>

#include <linux/iio/iio.h>

#include <linux/iio/buffer.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/timer/stm32-timer-trigger.h>

#include <linux/iio/trigger.h>

#include <linux/iio/trigger.h>

#include <linux/iio/trigger_consumer.h>

#include <linux/iio/trigger_consumer.h>
@@ -182,6 +183,11 @@ enum stm32_adc_extsel { 
	STM32_EXT13,

	STM32_EXT13,

	STM32_EXT14,

	STM32_EXT14,

	STM32_EXT15,

	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 },

	{ TIM4_TRGO, STM32_EXT12 },

	{ TIM6_TRGO, STM32_EXT13 },

	{ TIM6_TRGO, STM32_EXT13 },

	{ TIM3_CH4, STM32_EXT15 },

	{ 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

		 * Checking both stm32 timer trigger type and trig name

		 * should be safe against arbitrary trigger names.

		 * 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)) {

		    !strcmp(adc->cfg->trigs[i].name, trig->name)) {

			return adc->cfg->trigs[i].extsel;

			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.parent = &pdev->dev;

	indio_dev->dev.of_node = pdev->dev.of_node;

	indio_dev->dev.of_node = pdev->dev.of_node;

	indio_dev->info = &stm32_adc_iio_info;

	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);

	platform_set_drvdata(pdev, adc);