Messages in this thread Patch in this message | | | From | Fabrice Gasnier <> | Subject | [PATCH 2/5] iio: adc: stm32: add dt option to set default trigger polarity | Date | Mon, 30 Jan 2017 14:57:40 +0100 |
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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@st.com> --- 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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