STM32 ADC trigger polarity can be set to either rising, falling
or both edges. Add dt option to configure it.
Note: default value may be overridden later via trigger_polarity
sysfs attribute.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@xxxxxx>
---
drivers/iio/adc/stm32-adc.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index 9b49a6ad..be0e457 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -997,6 +997,13 @@ static int stm32_adc_probe(struct platform_device *pdev)
return -EINVAL;
}
+ of_property_read_u32(pdev->dev.of_node, "st,trigger-polarity",
+ &adc->trigger_polarity);
+ if (adc->trigger_polarity >= ARRAY_SIZE(stm32_trig_pol_items)) {
+ dev_err(&pdev->dev, "Invalid st,trigger-polarity property\n");
+ return -EINVAL;
+ }
+
adc->irq = platform_get_irq(pdev, 0);
if (adc->irq < 0) {
dev_err(&pdev->dev, "failed to get irq\n");
--
1.9.1
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