[v2 2/8] dt-bindings: iio: adc: Binding ast2600 adc.
From: Billy Tsai <hidden>
Date: 2021-07-23 08:16:42
Also in:
linux-arm-kernel, linux-devicetree, linux-iio, lkml
Subsystem:
iio subsystem and drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Jonathan Cameron, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
This patch add more description about aspeed adc and add two property for ast2600: - vref: used to configure reference voltage. - battery-sensing: used to enable battery sensing mode for last channel. Signed-off-by: Billy Tsai <redacted> --- .../bindings/iio/adc/aspeed,adc.yaml | 28 +++++++++++++++++-- 1 file changed, 26 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/iio/adc/aspeed,adc.yaml b/Documentation/devicetree/bindings/iio/adc/aspeed,adc.yaml
index 23f3da1ffca3..a562a7fbc30c 100644
--- a/Documentation/devicetree/bindings/iio/adc/aspeed,adc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/aspeed,adc.yaml@@ -10,14 +10,26 @@ maintainers: - Joel Stanley <joel@jms.id.au> description: - This device is a 10-bit converter for 16 voltage channels. All inputs are - single ended. + ? 10-bits resolution for 16 voltage channels. + At ast2400/ast2500 the device has only one engine with 16 voltage channels. + At ast2600 the device split into two individual engine and each contains 8 voltage channels. + ? Channel scanning can be non-continuous. + ? Programmable ADC clock frequency. + ? Programmable upper and lower bound for each channels. + ? Interrupt when larger or less than bounds for each channels. + ? Support hysteresis for each channels. + ? Buildin a compensating method. + Additional feature at ast2600 + ? Internal or External reference voltage. + ? Support 2 Internal reference voltage 1.2v or 2.5v. + ? Integrate dividing circuit for battery sensing. properties: compatible: enum: - aspeed,ast2400-adc - aspeed,ast2500-adc + - aspeed,ast2600-adc reg: maxItems: 1
@@ -33,6 +45,18 @@ properties: "#io-channel-cells": const: 1 + vref: + minItems: 900 + maxItems: 2700 + default: 2500 + description: + ADC Reference voltage in millivolts. + + battery-sensing: + type: boolean + description: + Inform the driver that last channel will be used to sensor battery. + required: - compatible - reg
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2.25.1