dt-bindings: mfd: Convert Allwinner GPADC bindings to a schema
The Allwinner SoCs have an embedded GPADC that is doing thermal reading as well, supported in Linux, with a matching Device Tree binding. Now that we have the DT validation in place, let's convert the device tree bindings for that controller over to a YAML schemas. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
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Maxime Ripard
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/adc/allwinner,sun8i-a33-ths.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Allwinner A33 Thermal Sensor Device Tree Bindings
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maintainers:
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- Chen-Yu Tsai <wens@csie.org>
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- Maxime Ripard <maxime.ripard@bootlin.com>
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properties:
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"#io-channel-cells":
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const: 0
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"#thermal-sensor-cells":
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const: 0
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compatible:
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const: allwinner,sun8i-a33-ths
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reg:
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maxItems: 1
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required:
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- "#io-channel-cells"
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- "#thermal-sensor-cells"
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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ths: ths@1c25000 {
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compatible = "allwinner,sun8i-a33-ths";
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reg = <0x01c25000 0x100>;
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#thermal-sensor-cells = <0>;
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#io-channel-cells = <0>;
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};
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...
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/mfd/allwinner,sun4i-a10-ts.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Allwinner A10 Resistive Touchscreen Controller Device Tree Bindings
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maintainers:
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- Chen-Yu Tsai <wens@csie.org>
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- Maxime Ripard <maxime.ripard@bootlin.com>
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properties:
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"#thermal-sensor-cells":
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const: 0
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compatible:
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enum:
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- allwinner,sun4i-a10-ts
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- allwinner,sun5i-a13-ts
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- allwinner,sun6i-a31-ts
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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allwinner,ts-attached:
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$ref: /schemas/types.yaml#/definitions/flag
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description: A touchscreen is attached to the controller
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allwinner,tp-sensitive-adjust:
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allOf:
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- $ref: /schemas/types.yaml#/definitions/uint32
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- minimum: 0
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maximum: 15
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default: 15
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description: Sensitivity of pen down detection
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allwinner,filter-type:
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allOf:
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- $ref: /schemas/types.yaml#/definitions/uint32
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- minimum: 0
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maximum: 3
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default: 1
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description: |
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Select median and averaging filter. Sample used for median /
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averaging filter:
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0: 4/2
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1: 5/3
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2: 8/4
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3: 16/8
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required:
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- "#thermal-sensor-cells"
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- compatible
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- reg
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- interrupts
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additionalProperties: false
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examples:
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- |
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rtp: rtp@1c25000 {
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compatible = "allwinner,sun4i-a10-ts";
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reg = <0x01c25000 0x100>;
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interrupts = <29>;
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allwinner,ts-attached;
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#thermal-sensor-cells = <0>;
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/* sensitive/noisy touch panel */
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allwinner,tp-sensitive-adjust = <0>;
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allwinner,filter-type = <3>;
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};
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...
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@ -1,59 +0,0 @@
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Allwinner SoCs' GPADC Device Tree bindings
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------------------------------------------
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The Allwinner SoCs all have an ADC that can also act as a thermal sensor
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and sometimes as a touchscreen controller.
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Required properties:
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- compatible: "allwinner,sun8i-a33-ths",
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- reg: mmio address range of the chip,
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- #thermal-sensor-cells: shall be 0,
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- #io-channel-cells: shall be 0,
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Example:
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ths: ths@1c25000 {
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compatible = "allwinner,sun8i-a33-ths";
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reg = <0x01c25000 0x100>;
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#thermal-sensor-cells = <0>;
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#io-channel-cells = <0>;
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};
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sun4i, sun5i and sun6i SoCs are also supported via the older binding:
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sun4i resistive touchscreen controller
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--------------------------------------
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Required properties:
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- compatible: "allwinner,sun4i-a10-ts", "allwinner,sun5i-a13-ts" or
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"allwinner,sun6i-a31-ts"
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- reg: mmio address range of the chip
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- interrupts: interrupt to which the chip is connected
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- #thermal-sensor-cells: shall be 0
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Optional properties:
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- allwinner,ts-attached : boolean indicating that an actual touchscreen
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is attached to the controller
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- allwinner,tp-sensitive-adjust : integer (4 bits)
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adjust sensitivity of pen down detection
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between 0 (least sensitive) and 15
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(defaults to 15)
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- allwinner,filter-type : integer (2 bits)
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select median and averaging filter
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samples used for median / averaging filter
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0: 4/2
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1: 5/3
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2: 8/4
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3: 16/8
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(defaults to 1)
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Example:
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rtp: rtp@1c25000 {
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compatible = "allwinner,sun4i-a10-ts";
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reg = <0x01c25000 0x100>;
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interrupts = <29>;
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allwinner,ts-attached;
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#thermal-sensor-cells = <0>;
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/* sensitive/noisy touch panel */
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allwinner,tp-sensitive-adjust = <0>;
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allwinner,filter-type = <3>;
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};
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