On 24 October 2017 17:41:38 BST, Rob Herring <robh@xxxxxxxxxx> wrote: >On Tue, Oct 17, 2017 at 03:15:43PM +0200, Fabrice Gasnier wrote: >> STM32H7 ADC channels may be configured either as single-ended or >> differential. >> Add 'st,adc-diff-channels' property to support differential channels. >> Differential channels are defined as a pair of positive and negative >> inputs: vinp & vinn. >> >> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@xxxxxx> >> --- >> Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt | 6 >++++++ >> 1 file changed, 6 insertions(+) >> >> diff --git >a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt >b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt >> index 48bfcaa3..c3c8de1 100644 >> --- a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt >> +++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt >> @@ -62,6 +62,12 @@ Required properties: >> - st,adc-channels: List of single-ended channels muxed for this ADC. >> It can have up to 16 channels on stm32f4 or 20 channels on >stm32h7, numbered >> from 0 to 15 or 19 (resp. for in0..in15 or in0..in19). >> +- st,adc-diff-channels: List of differential channels muxed for this >ADC. >> + Depending on part used, some channels can be configured as >differential >> + instead of single-ended (e.g. stm32h7). List here positive and >negative >> + inputs pairs as <vinp vinn>, <vinp vinn>,... vinp and vinn are >numbered >> + from 0 to 19 on stm32h7) >> + Note: At least one of "st,adc-channels" or "st,adc-diff-channels" >is required. > >Wouldn't both present be invalid? > Probably invalid to have a number in both but some channels in each would be fine. >> - #io-channel-cells = <1>: See the IIO bindings section "IIO >consumers" in >> Documentation/devicetree/bindings/iio/iio-bindings.txt >> >> -- >> 1.9.1 >> -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
