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12f6baa472
Add device tree bindings for the monochrome Sharp Memory LCD Co-developed-by: Mehdi Djait <mehdi.djait@bootlin.com> Signed-off-by: Mehdi Djait <mehdi.djait@bootlin.com> Signed-off-by: Alex Lanzano <lanzano.alex@gmail.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20241015230617.3020230-2-lanzano.alex@gmail.com Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
93 lines
2.1 KiB
YAML
93 lines
2.1 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/display/sharp,ls010b7dh04.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Sharp Memory LCD panels
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maintainers:
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- Alex Lanzano <lanzano.alex@gmail.com>
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description:
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Sharp Memory LCDs are a series of monochrome displays that operate over
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a SPI bus. The displays require a signal (VCOM) to be generated to prevent
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DC bias build up resulting in pixels being unable to change. Three modes
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can be used to provide the VCOM signal ("software", "external", "pwm").
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properties:
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compatible:
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enum:
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- sharp,ls010b7dh04
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- sharp,ls011b7dh03
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- sharp,ls012b7dd01
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- sharp,ls013b7dh03
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- sharp,ls013b7dh05
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- sharp,ls018b7dh02
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- sharp,ls027b7dh01
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- sharp,ls027b7dh01a
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- sharp,ls032b7dd02
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- sharp,ls044q7dh01
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reg:
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maxItems: 1
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spi-max-frequency:
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maximum: 2000000
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sharp,vcom-mode:
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$ref: /schemas/types.yaml#/definitions/string
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description: |
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software - This mode relies on a software operation to send a
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"maintain display" message to the display, toggling the vcom
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bit on and off with each message
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external - This mode relies on an external clock to generate
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the signal on the EXTCOMM pin
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pwm - This mode relies on a pwm device to generate the signal
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on the EXTCOMM pin
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enum: [software, external, pwm]
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enable-gpios: true
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pwms:
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maxItems: 1
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description: External VCOM signal
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required:
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- compatible
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- reg
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- sharp,vcom-mode
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allOf:
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- $ref: panel/panel-common.yaml#
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- $ref: /schemas/spi/spi-peripheral-props.yaml#
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- if:
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properties:
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sharp,vcom-mode:
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const: pwm
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then:
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required:
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- pwms
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unevaluatedProperties: false
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examples:
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- |
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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display@0 {
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compatible = "sharp,ls013b7dh03";
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reg = <0>;
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spi-cs-high;
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spi-max-frequency = <1000000>;
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sharp,vcom-mode = "software";
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};
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};
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...
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