MCP3911 is a dual channel Analog Front End (AFE) containing two
synchronous sampling delta-sigma Analog-to-Digital Converters (ADC).
Co-Developed-by: Kent Gustavsson <k...@minoris.se>
Signed-off-by: Kent Gustavsson <k...@minoris.se>
Signed-off-by: Marcus Folkesson <marcus.folkes...@gmail.com>
Reviewed-by: Rob Herring <r...@kernel.org>
---
Notes:
v4:
- remove reference to Documentation/.../interrupts.txt
- add Kent as co-developer
v3:
- add bindings for interrupt
- prefix device-addr with `microchip`
- drop `clock-names`
v2:
- drop channel width
- drop `external_vref`
- replace `external-clock` with proper clock bindings
.../devicetree/bindings/iio/adc/mcp3911.txt | 30 ++++++++++++++++++++++
1 file changed, 30 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/mcp3911.txt
diff --git a/Documentation/devicetree/bindings/iio/adc/mcp3911.txt
b/Documentation/devicetree/bindings/iio/adc/mcp3911.txt
new file mode 100644
index 000000000000..3071f48fb30b
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/mcp3911.txt
@@ -0,0 +1,30 @@
+* Microchip MCP3911 Dual channel analog front end (ADC)
+
+Required properties:
+ - compatible: Should be "microchip,mcp3911"
+ - reg: SPI chip select number for the device
+
+Recommended properties:
+ - spi-max-frequency: Definition as per
+ Documentation/devicetree/bindings/spi/spi-bus.txt.
+ Max frequency for this chip is 20MHz.
+
+Optional properties:
+ - clocks: Phandle and clock identifier for sampling clock
+ - interrupt-parent: Phandle to the parent interrupt controller
+ - interrupts: IRQ line for the ADC
+ - microchip,device-addr: Device address when multiple MCP3911 chips are
present on the
+ same SPI bus. Valid values are 0-3. Defaults to 0.
+ - vref-supply: Phandle to the external reference voltage supply.
+
+Example:
+adc@0 {
+ compatible = "microchip,mcp3911";
+ reg = <0>;
+ interrupt-parent = <&gpio5>;
+ interrupts = <15 IRQ_TYPE_EDGE_RISING>;
+ spi-max-frequency = <20000000>;
+ microchip,device-addr = <0>;
+ vref-supply = <&vref_reg>;
+ clocks = <&xtal>;
+};
--
2.11.0.rc2
