Document support for AD7768-1 Analog to Digital Converter.
Signed-off-by: Stefan Popa <stefan.popa@xxxxxxxxxx>
---
Changes in v2:
- Added information regarding the simultaneous sampling of the SYNC-IN pin
- Added the reset-gpios in the binding.
.../devicetree/bindings/iio/adc/adi,ad7768-1.txt | 41 ++++++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 42 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.txt
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.txt b/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.txt
new file mode 100644
index 0000000..9f5b88c
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.txt
@@ -0,0 +1,41 @@
+Analog Devices AD7768-1 ADC device driver
+
+Required properties for the AD7768-1:
+
+- compatible: Must be "adi,ad7768-1"
+- reg: SPI chip select number for the device
+- spi-max-frequency: Max SPI frequency to use
+ see: Documentation/devicetree/bindings/spi/spi-bus.txt
+- clocks: phandle to the master clock (mclk)
+ see: Documentation/devicetree/bindings/clock/clock-bindings.txt
+- clock-names: Must be "mclk".
+- interrupts: IRQ line for the ADC
+ see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+- vref-supply: vref supply can be used as reference for conversion
+- adi,sync-in-gpios: must be the device tree identifier of the SYNC-IN pin. Enables
+ synchronization of multiple devices that require simultaneous sampling.
+ A pulse is always required if the configuration is changed in any way, for example
+ if the filter decimation rate changes. As the line is active low, it should
+ be marked GPIO_ACTIVE_LOW.
+
+Optional properties:
+
+ - reset-gpios : GPIO spec for the RESET pin. If specified, it will be asserted during
+ driver probe. As the line is active low, it should be marked GPIO_ACTIVE_LOW.
+
+Example:
+
+ adc@0 {
+ compatible = "adi,ad7768-1";
+ reg = <0>;
+ spi-max-frequency = <2000000>;
+ spi-cpol;
+ spi-cpha;
+ vref-supply = <&adc_vref>;
+ interrupts = <25 IRQ_TYPE_EDGE_RISING>;
+ interrupt-parent = <&gpio>;
+ adi,sync-in-gpios = <&gpio 22 GPIO_ACTIVE_LOW>;
+ reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
+ clocks = <&ad7768_mclk>;
+ clock-names = "mclk";
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 3ba3811..e5613b6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -868,6 +868,7 @@ L: linux-iio@xxxxxxxxxxxxxxx
W: http://ez.analog.com/community/linux-device-drivers
S: Supported
F: drivers/iio/adc/ad7768-1.c
+F: Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.txt
ANALOG DEVICES INC AD9389B DRIVER
M: Hans Verkuil <hans.verkuil@xxxxxxxxx>
--
2.7.4
