Document support for AD7606 Analog to Digital Converter.
Signed-off-by: Stefan Popa <stefan.popa@xxxxxxxxxx>
---
Changes in v2:
- fixed indentation issues.
- used gpios instead of gpio.
- added vendor prefix for conversion-start-gpios, first-data-gpios,
and range-gpios.
Changes in v3:
- Added adi,oversampling-ratio-gpios.
Changes in v4:
- Specified if the gpios are active high or low and set the flag
appropriately.
.../devicetree/bindings/iio/adc/adi,ad7606.txt | 65 ++++++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 66 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt b/Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt
new file mode 100644
index 0000000..d7b6241
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt
@@ -0,0 +1,65 @@
+Analog Devices AD7606 Simultaneous Sampling ADC
+
+Required properties for the AD7606:
+
+- compatible: Must be one of
+ * "adi,ad7605-4"
+ * "adi,ad7606-8"
+ * "adi,ad7606-6"
+ * "adi,ad7606-4"
+- reg: SPI chip select number for the device
+- spi-max-frequency: Max SPI frequency to use
+ see: Documentation/devicetree/bindings/spi/spi-bus.txt
+- spi-cpha: See Documentation/devicetree/bindings/spi/spi-bus.txt
+- avcc-supply: phandle to the Avcc power supply
+- interrupts: IRQ line for the ADC
+ see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+- adi,conversion-start-gpios: must be the device tree identifier of the CONVST pin.
+ This logic input is used to initiate conversions on the analog
+ input channels. As the line is active high, it should be marked
+ GPIO_ACTIVE_HIGH.
+
+Optional properties:
+
+- reset-gpios: must be the device tree identifier of the RESET pin. If specified,
+ it will be asserted during driver probe. As the line is active high,
+ it should be marked GPIO_ACTIVE_HIGH.
+- standby-gpios: must be the device tree identifier of the STBY pin. This pin is used
+ to place the AD7606 into one of two power-down modes, Standby mode or
+ Shutdown mode. As the line is active low, it should be marked
+ GPIO_ACTIVE_LOW.
+- adi,first-data-gpios: must be the device tree identifier of the FRSTDATA pin.
+ The FRSTDATA output indicates when the first channel, V1, is
+ being read back on either the parallel, byte or serial interface.
+ As the line is active high, it should be marked GPIO_ACTIVE_HIGH.
+- adi,range-gpios: must be the device tree identifier of the RANGE pin. The polarity on
+ this pin determines the input range of the analog input channels. If
+ this pin is tied to a logic high, the analog input range is ±10V for
+ all channels. If this pin is tied to a logic low, the analog input range
+ is ±5V for all channels. As the line is active high, it should be marked
+ GPIO_ACTIVE_HIGH.
+- adi,oversampling-ratio-gpios: must be the device tree identifier of the over-sampling
+ mode pins. As the line is active high, it should be marked
+ GPIO_ACTIVE_HIGH.
+
+Example:
+
+ adc@0 {
+ compatible = "adi,ad7606-8";
+ reg = <0>;
+ spi-max-frequency = <1000000>;
+ spi-cpol;
+
+ avcc-supply = <&adc_vref>;
+
+ interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
+ interrupt-parent = <&gpio>;
+
+ adi,conversion-start-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>;
+ reset-gpios = <&gpio 27 GPIO_ACTIVE_HIGH>;
+ adi,first-data-gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
+ adi,oversampling-ratio-gpios = <&gpio 18 GPIO_ACTIVE_HIGH
+ &gpio 23 GPIO_ACTIVE_HIGH
+ &gpio 26 GPIO_ACTIVE_HIGH>;
+ standby-gpios = <&gpio 24 GPIO_ACTIVE_LOW>;
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 843545d..6d63db4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -845,6 +845,7 @@ L: linux-iio@xxxxxxxxxxxxxxx
W: http://ez.analog.com/community/linux-device-drivers
S: Supported
F: drivers/iio/adc/ad7606.c
+F: Documentation/devicetree/bindings/iio/adc/ad7606.txt
ANALOG DEVICES INC AD9389B DRIVER
M: Hans Verkuil <hans.verkuil@xxxxxxxxx>
--
2.7.4
