Signed-off-by: Rick Altherr <ralth...@google.com>
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.../devicetree/bindings/hwmon/aspeed_adc.txt | 48 ++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed_adc.txt
diff --git a/Documentation/devicetree/bindings/hwmon/aspeed_adc.txt
b/Documentation/devicetree/bindings/hwmon/aspeed_adc.txt
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+Aspeed AST2400/2500 ADC
+
+This device is a 10-bit converter for 16 voltage channels. All inputs are
+single ended. Each channel can be individually enabled to allow for use of
+alternate pin functions.
+
+1) adc node
+
+ Required properties:
+ - compatible : Should be one of
+ "aspeed,ast2400-adc"
+ "aspeed,ast2500-adc"
+ - reg : memory window mapping address and length
+ - #address-cells : must be <1> corresponding to the channel child binding
+ - #size-cells : must be <0> corresponding to the channel child binding
+ - clocks : Input clock used to derive the sample clock. Expected to be the
+ SoC's APB clock.
+ - update-interval-ms : initial time between updates on a channel
+
+ The node contains child nodes for each channel that the platform uses.
+
+ Example adc node:
+ adc@1e6e9000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "aspeed,ast2400-adc";
+ reg = <0x1e6e9000 0xB0>;
+ clocks = <&clk_apb>;
+ update-interval-ms = <100>;
+
+ [ child node definitions... ]
+ };
+
+2) channel nodes
+
+ Optional properties:
+ - status: indicates the operational status of the device.
+ Value must be either "disabled" or "okay".
+ - label : string describing the monitored value
+
+ Example channel node:
+ channel@1 {
+ status = "okay";
+ label = "3V3 rail";
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_adc0_default>;
+ };
--
2.11.0.483.g087da7b7c-goog
