From mboxrd@z Thu Jan 1 00:00:00 1970 From: fabrice.gasnier@st.com (Fabrice Gasnier) Date: Tue, 17 Oct 2017 15:15:43 +0200 Subject: [PATCH 1/3] dt-bindings: iio: adc: stm32: add support for diff channels In-Reply-To: <1508246145-19417-1-git-send-email-fabrice.gasnier@st.com> References: <1508246145-19417-1-git-send-email-fabrice.gasnier@st.com> Message-ID: <1508246145-19417-2-git-send-email-fabrice.gasnier@st.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- 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 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. - #io-channel-cells = <1>: See the IIO bindings section "IIO consumers" in Documentation/devicetree/bindings/iio/iio-bindings.txt -- 1.9.1