Add device tree bindings for the monochrome Sharp Memory LCD Signed-off-by: Alex Lanzano <lanzano.alex@xxxxxxxxx> Co-developed-by: Mehdi Djait <mehdi.djait@xxxxxxxxxxx> Signed-off-by: Mehdi Djait <mehdi.djait@xxxxxxxxxxx> --- .../bindings/display/sharp,ls010b7dh04.yaml | 94 +++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/sharp,ls010b7dh04.yaml diff --git a/Documentation/devicetree/bindings/display/sharp,ls010b7dh04.yaml b/Documentation/devicetree/bindings/display/sharp,ls010b7dh04.yaml new file mode 100644 index 000000000000..79bde7bf0d7d --- /dev/null +++ b/Documentation/devicetree/bindings/display/sharp,ls010b7dh04.yaml @@ -0,0 +1,94 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/sharp,ls010b7dh04.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Sharp Memory LCD panels + +maintainers: + - Alex Lanzano <lanzano.alex@xxxxxxxxx> + +description: + Sharp Memory LCDs are a series of monochrome displays that operate over + a SPI bus when the chip select is high. The displays require a signal (VCOM) + to be generated to prevent DC bias build up resulting in pixels being + unable to change. Three modes can be used to provide the VCOM signal + ("software", "external", "pwm"). + +properties: + compatible: + enum: + - sharp,ls010b7dh04 + - sharp,ls011b7dh03 + - sharp,ls012b7dd01 + - sharp,ls013b7dh03 + - sharp,ls013b7dh05 + - sharp,ls018b7dh02 + - sharp,ls027b7dh01 + - sharp,ls027b7dh01a + - sharp,ls032b7dd02 + - sharp,ls044q7dh01 + + reg: + maxItems: 1 + + spi-cs-high: true + + spi-max-frequency: + maximum: 2000000 + + sharp,vcom-mode: + $ref: /schemas/types.yaml#/definitions/string + description: | + software - This mode relies on a software operation to send a + "maintain display" message to the display, toggling the vcom + bit on and off with each message + + external - This mode relies on an external clock to generate + the signal on the EXTCOMM pin + + pwm - This mode relies on a pwm device to generate the signal + on the EXTCOMM pin + + enable-gpios: true + + pwms: + maxItems: 1 + description: External VCOM signal + +required: + - compatible + - reg + - spi-cs-high + - sharp,vcom-mode + +allOf: + - $ref: panel/panel-common.yaml# + - $ref: /schemas/spi/spi-peripheral-props.yaml# + + - if: + properties: + sharp,vcom-mode: + const: pwm + then: + required: + - pwms + +additionalProperties: false + +examples: + - | + spi { + #address-cells = <1>; + #size-cells = <0>; + + display@0{ + compatible = "sharp,ls013b7dh03"; + reg = <0>; + spi-cs-high; + spi-max-frequency = <1000000>; + sharp,vcom-mode = "software"; + }; + }; +... -- 2.45.2
