From: Fabrice Gasnier <fabrice.gasnier@st.com>
To: <jic23@kernel.org>, <robh+dt@kernel.org>
Cc: <linux@armlinux.org.uk>, <mark.rutland@arm.com>,
<mcoquelin.stm32@gmail.com>, <alexandre.torgue@st.com>,
<lars@metafoo.de>, <knaack.h@gmx.de>, <pmeerw@pmeerw.net>,
<fabrice.gasnier@st.com>, <linux-iio@vger.kernel.org>,
<devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <benjamin.gaignard@linaro.org>,
<benjamin.gaignard@st.com>
Subject: [PATCH 1/3] dt-bindings: iio: adc: stm32: add support for diff channels
Date: Tue, 17 Oct 2017 15:15:43 +0200 [thread overview]
Message-ID: <1508246145-19417-2-git-send-email-fabrice.gasnier@st.com> (raw)
In-Reply-To: <1508246145-19417-1-git-send-email-fabrice.gasnier@st.com>
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@st.com>
---
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.
- #io-channel-cells = <1>: See the IIO bindings section "IIO consumers" in
Documentation/devicetree/bindings/iio/iio-bindings.txt
--
1.9.1
next prev parent reply other threads:[~2017-10-17 13:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-17 13:15 [PATCH 0/3] iio: adc: stm32: Add support for differential channels Fabrice Gasnier
2017-10-17 13:15 ` Fabrice Gasnier [this message]
2017-10-21 17:54 ` [PATCH 1/3] dt-bindings: iio: adc: stm32: add support for diff channels Jonathan Cameron
2017-10-21 17:55 ` Jonathan Cameron
2017-10-21 19:23 ` Jonathan Cameron
2017-10-23 8:06 ` Fabrice Gasnier
2017-10-23 13:09 ` Jonathan Cameron
2017-10-24 16:41 ` Rob Herring
2017-10-24 18:42 ` Jonathan Cameron
2017-10-25 8:05 ` Fabrice Gasnier
2017-10-17 13:15 ` [PATCH 2/3] iio: adc: stm32: remove const channel names definition Fabrice Gasnier
2017-10-21 17:59 ` Jonathan Cameron
2017-10-17 13:15 ` [PATCH 3/3] iio: adc: stm32: add support for differential channels Fabrice Gasnier
2017-10-21 19:25 ` Jonathan Cameron
2017-10-23 8:09 ` Fabrice Gasnier
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