[PATCH v2 2/5] iio: adc: stm32: add dt option to set default trigger polarity
From: Fabrice Gasnier <hidden>
Date: 2017-01-30 14:35:54
Also in:
linux-arm-kernel, linux-iio, lkml
Subsystem:
iio subsystem and drivers, the rest · Maintainers:
Jonathan Cameron, Linus Torvalds
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 <redacted> --- 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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