From a70b93bcb36ffe0844b7b4ca33e5c5234f629006 Mon Sep 17 00:00:00 2001
From: Eva Rachel Retuya <eraretuya@gmail.com>
Date: Sat, 4 Mar 2017 16:31:23 +0800
Subject: [PATCH] dt-bindings: iio: accel: Document ADXL345 accelerometer
binding
Add the device tree binding documentation for the ADXL345 3-axis digital
accelerometer.
Signed-off-by: Eva Rachel Retuya <eraretuya@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
---
.../devicetree/bindings/iio/accel/adxl345.txt | 38 +++++++++++++++++++
1 file changed, 38 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/accel/adxl345.txt
diff --git a/Documentation/devicetree/bindings/iio/accel/adxl345.txt b/Documentation/devicetree/bindings/iio/accel/adxl345.txt
new file mode 100644
index 0000000000000..e7111b02c02c4
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/accel/adxl345.txt
@@ -0,0 +1,38 @@
+Analog Devices ADXL345 3-Axis, +/-(2g/4g/8g/16g) Digital Accelerometer
+
+http://www.analog.com/en/products/mems/accelerometers/adxl345.html
+
+Required properties:
+ - compatible : should be "adi,adxl345"
+ - reg : the I2C address or SPI chip select number of the sensor
+
+Required properties for SPI bus usage:
+ - spi-max-frequency : set maximum clock frequency, must be 5000000
+ - spi-cpol and spi-cpha : must be defined for adxl345 to enable SPI mode 3
+
+Optional properties:
+ - interrupt-parent : phandle to the parent interrupt controller as documented
+ in Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+ - interrupts: interrupt mapping for IRQ as documented in
+ Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+
+Example for a I2C device node:
+
+ accelerometer@2a {
+ compatible = "adi,adxl345";
+ reg = <0x53>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
+ };
+
+Example for a SPI device node:
+
+ accelerometer@0 {
+ compatible = "adi,adxl345";
+ reg = <0>;
+ spi-max-frequency = <5000000>;
+ spi-cpol;
+ spi-cpha;
+ interrupt-parent = <&gpio1>;
+ interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
+ };
--
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