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Add the compatible strings "aspeed,ast2700-adc0" and "aspeed,ast2700-adc1" to the binding for the Aspeed ADC. These new compatibles represent the ADC instances found on the AST2700 SoC, which are similar to the AST2600 but have their trimming data located at different SCU offset. Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
96 lines
2.5 KiB
YAML
96 lines
2.5 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/adc/aspeed,ast2600-adc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: ADC that forms part of an ASPEED server management processor.
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maintainers:
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- Billy Tsai <billy_tsai@aspeedtech.com>
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description: |
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• 10-bits resolution for 16 voltage channels.
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• The device split into two individual engine and each contains 8 voltage
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channels.
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• Channel scanning can be non-continuous.
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• Programmable ADC clock frequency.
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• Programmable upper and lower threshold for each channels.
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• Interrupt when larger or less than threshold for each channels.
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• Support hysteresis for each channels.
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• Built-in a compensating method.
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• Built-in a register to trim internal reference voltage.
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• Internal or External reference voltage.
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• Support 2 Internal reference voltage 1.2v or 2.5v.
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• Integrate dividing circuit for battery sensing.
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properties:
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compatible:
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enum:
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- aspeed,ast2600-adc0
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- aspeed,ast2600-adc1
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- aspeed,ast2700-adc0
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- aspeed,ast2700-adc1
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description:
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Their trimming data, which is used to calibrate internal reference volage,
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locates in different address of OTP.
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reg:
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maxItems: 1
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clocks:
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maxItems: 1
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description:
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Input clock used to derive the sample clock. Expected to be the
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SoC's APB clock.
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resets:
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maxItems: 1
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"#io-channel-cells":
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const: 1
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vref-supply:
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description:
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The external regulator supply ADC reference voltage.
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aspeed,int-vref-microvolt:
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enum: [1200000, 2500000]
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description:
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ADC internal reference voltage in microvolts.
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aspeed,battery-sensing:
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type: boolean
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description:
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Inform the driver that last channel will be used to sensor battery.
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required:
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- compatible
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- reg
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- clocks
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- resets
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- "#io-channel-cells"
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/ast2600-clock.h>
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adc0: adc@1e6e9000 {
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compatible = "aspeed,ast2600-adc0";
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reg = <0x1e6e9000 0x100>;
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clocks = <&syscon ASPEED_CLK_APB2>;
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resets = <&syscon ASPEED_RESET_ADC>;
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#io-channel-cells = <1>;
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aspeed,int-vref-microvolt = <2500000>;
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};
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adc1: adc@1e6e9100 {
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compatible = "aspeed,ast2600-adc1";
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reg = <0x1e6e9100 0x100>;
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clocks = <&syscon ASPEED_CLK_APB2>;
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resets = <&syscon ASPEED_RESET_ADC>;
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#io-channel-cells = <1>;
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aspeed,int-vref-microvolt = <2500000>;
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};
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...
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