linux-kernel - [PATCH v2 11/14] staging: iio: ad7746: Add devicetree bindings documentation

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Message-Id: <1523637411-8531-12-git-send-email-hernan@vanguardiasur.com.ar>
Date:   Fri, 13 Apr 2018 13:36:48 -0300
From:   Hernán Gonzalez <hernan@...guardiasur.com.ar>
To:     jic23@...nel.org, knaack.h@....de, lars@...afoo.de,
        pmeerw@...erw.net, gregkh@...uxfoundation.org,
        Michael.Hennerich@...log.com, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Hernán Gonzalez <hernan@...guardiasur.com.ar>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org
Subject: [PATCH v2 11/14] staging: iio: ad7746: Add devicetree bindings documentation

Cc: Rob Herring <robh+dt@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: devicetree@...r.kernel.org
Signed-off-by: Hernán Gonzalez <hernan@...guardiasur.com.ar>
---
 .../devicetree/bindings/staging/iio/cdc/ad7746.txt | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt

diff --git a/Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt b/Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt
new file mode 100644
index 0000000..7740f05
--- /dev/null
+++ b/Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt
@@ -0,0 +1,34 @@
+Analog Devices AD7746/5/7 capacitive sensor driver
+
+Required properties:
+	- compatible: Should be one of
+		* "adi,ad7745"
+		* "adi,ad7746"
+	  * "adi,ad7747"
+	- reg: The 7-bits long I2c address of the device
+
+Optional properties:
+	- adi,exclvl: This property defines the excitation voltage level for the
+    capacitance to be measured. Possible values are:
+      * 0 = +-VDD/8
+      * 1 = +-VDD/4
+      * 2 = +-VDD * 3/8
+      * 3 = +-VDD/2 (Default)
+	- adi,nexca_en: Invert excitation output A.
+	- adi,nexcb_en:	Invert excitation output B.
+
+Example:
+Here exclvl would be 1 (VDD/4), Excitation pin A would be inverted and
+Excitation pin B would NOT be inverted.
+
+i2c2 {
+
+      < . . . >
+
+      ad7746: ad7746@60 {
+              compatible = "ad7746";
+              reg = <0x60>;
+              adi,exclvl = <1>;
+              adi,nexca_en;
+      };
+};
-- 
2.7.4