153a197077
The Allwinner F1C100s series of SoCs contain a LRADC (aka. KEYADC) compatible to the version in other SoCs. The manual doesn't mention the ratio of the input voltage that is used, but comparing actual measurements with the values in the register suggests that it is 3/4 of Vref. Add an F1C100s compatible string to the list, and pair it with the A83T fallback. Since the A64 is the same, combined both using an enum. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20221101141658.3631342-9-andre.przywara@arm.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
120 lines
2.3 KiB
YAML
120 lines
2.3 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/input/allwinner,sun4i-a10-lradc-keys.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Allwinner A10 LRADC
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maintainers:
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- Chen-Yu Tsai <wens@csie.org>
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- Maxime Ripard <mripard@kernel.org>
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properties:
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compatible:
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oneOf:
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- const: allwinner,sun4i-a10-lradc-keys
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- const: allwinner,sun8i-a83t-r-lradc
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- items:
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- enum:
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- allwinner,suniv-f1c100s-lradc
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- allwinner,sun50i-a64-lradc
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- const: allwinner,sun8i-a83t-r-lradc
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- const: allwinner,sun50i-r329-lradc
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- items:
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- const: allwinner,sun20i-d1-lradc
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- const: allwinner,sun50i-r329-lradc
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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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resets:
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maxItems: 1
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interrupts:
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maxItems: 1
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vref-supply:
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description:
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Regulator for the LRADC reference voltage
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wakeup-source: true
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patternProperties:
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"^button-[0-9]+$":
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type: object
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$ref: input.yaml#
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properties:
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label:
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$ref: /schemas/types.yaml#/definitions/string
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description: Descriptive name of the key
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linux,code: true
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channel:
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1]
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description: ADC Channel this key is attached to
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voltage:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Voltage in microvolts at LRADC input when this key is
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pressed
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required:
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- label
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- linux,code
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- channel
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- voltage
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additionalProperties: false
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required:
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- compatible
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- reg
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- interrupts
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- vref-supply
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if:
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properties:
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compatible:
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contains:
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enum:
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- allwinner,sun50i-r329-lradc
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then:
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required:
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- clocks
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- resets
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additionalProperties: false
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examples:
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- |
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lradc: lradc@1c22800 {
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compatible = "allwinner,sun4i-a10-lradc-keys";
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reg = <0x01c22800 0x100>;
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interrupts = <31>;
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vref-supply = <®_vcc3v0>;
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button-191 {
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label = "Volume Up";
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linux,code = <115>;
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channel = <0>;
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voltage = <191274>;
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};
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button-392 {
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label = "Volume Down";
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linux,code = <114>;
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channel = <0>;
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voltage = <392644>;
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};
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};
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...
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