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authorFabrice Gasnier <fabrice.gasnier@st.com>2017-08-28 12:04:14 +0200
committerLee Jones <lee.jones@linaro.org>2017-09-04 14:49:34 +0100
commitf0b638a7f6dba2eb6bf99fc648eab77f7ad5e59f (patch)
tree6b57cb6b085a9f0bbeada8a8da1df0f09e56bf4a /drivers/iio
parentd8958824cf0714cc4ddcf320cf12028277ad55c4 (diff)
downloadlinux-f0b638a7f6dba2eb6bf99fc648eab77f7ad5e59f.tar.bz2
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: Fabrice Gasnier <fabrice.gasnier@st.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/adc/stm32-adc.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index 5bfcc1f13105..1147d7e9055b 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -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);