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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/adc/aspeed,ast2600-adc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ADC that forms part of an ASPEED server management processor.
maintainers:
- Billy Tsai <billy_tsai@aspeedtech.com>
description: |
• 10-bits resolution for 16 voltage channels.
• 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 threshold for each channels.
• Interrupt when larger or less than threshold for each channels.
• Support hysteresis for each channels.
• Built-in a compensating method.
• Built-in a register to trim internal reference voltage.
• 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,ast2600-adc0
- aspeed,ast2600-adc1
description:
Their trimming data, which is used to calibrate internal reference volage,
locates in different address of OTP.
reg:
maxItems: 1
clocks:
maxItems: 1
description:
Input clock used to derive the sample clock. Expected to be the
SoC's APB clock.
resets:
maxItems: 1
"#io-channel-cells":
const: 1
vref-supply:
description:
The external regulator supply ADC reference voltage.
aspeed,int-vref-microvolt:
enum: [1200000, 2500000]
description:
ADC internal reference voltage in microvolts.
aspeed,battery-sensing:
type: boolean
description:
Inform the driver that last channel will be used to sensor battery.
required:
- compatible
- reg
- clocks
- resets
- "#io-channel-cells"
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/ast2600-clock.h>
adc0: adc@1e6e9000 {
compatible = "aspeed,ast2600-adc0";
reg = <0x1e6e9000 0x100>;
clocks = <&syscon ASPEED_CLK_APB2>;
resets = <&syscon ASPEED_RESET_ADC>;
#io-channel-cells = <1>;
aspeed,int-vref-microvolt = <2500000>;
};
adc1: adc@1e6e9100 {
compatible = "aspeed,ast2600-adc1";
reg = <0x1e6e9100 0x100>;
clocks = <&syscon ASPEED_CLK_APB2>;
resets = <&syscon ASPEED_RESET_ADC>;
#io-channel-cells = <1>;
aspeed,int-vref-microvolt = <2500000>;
};
...
|
