[PATCH 1/2] dt-bindings: iio: stm32-adc: add option to set resolution
From: jic23@kernel.org (Jonathan Cameron)
Date: 2017-02-19 12:11:27
Also in:
linux-devicetree, linux-iio, lkml
On 15/02/17 16:55, Fabrice Gasnier wrote:
Add documentation for 'st,adc-res' dt optional property. Signed-off-by: Fabrice Gasnier <redacted>
I'm happy with this, but would like to leave time for a device tree review. Ultimately we may well want to make this a generic property and call it something like adc-resolution but perhaps we need to wait until we have a few more devices supporting setting it via device tree to figure out what the best interface is. It would exactly be a problem to support this as a deprecated binding at that point. Give me a poke if we hear nothing from Rob or Mark for say another week. Thanks, Jonathan
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--- Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt | 4 ++++ 1 file changed, 4 insertions(+)diff --git a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt index 5dfc88e..45f7ff2 100644 --- a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt +++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt@@ -57,6 +57,9 @@ Optional properties: - dmas: Phandle to dma channel for this ADC instance. See ../../dma/dma.txt for details. - dma-names: Must be "rx" when dmas property is being used. +- st,adc-res: Resolution (bits) to use for conversions. Must match device + available resolutions (e.g. can be 6, 8, 10 or 12 on stm32f4). Default + is maximum resolution if unset. Example: adc: adc at 40012000 {@@ -84,6 +87,7 @@ Example: st,adc-channels = <8>; dmas = <&dma2 0 0 0x400 0x0>; dma-names = "rx"; + st,adc-res = <8>; }; ... other adc child nodes follow...