[PATCH v3 1/2] dt-bindings: display: Add Sharp Memory LCD bindings

Alex Lanzano
2024-07-29T01:44:14Z

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>
---
.../bindings/display/sharp,ls010b7dh04.yaml | 92 +++++++++++++++++++
1 file changed, 92 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..8097f091c2a5
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sharp,ls010b7dh04.yaml
@@ -0,0 +1,92 @@
+# 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@gmail.com>
+
+description:
+ Sharp Memory LCDs are a series of monochrome displays that operate over
+ a SPI bus. 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-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
+
+ enum: [software, external, pwm]
+
+ enable-gpios: true
+
+ pwms:
+ maxItems: 1
+ description: External VCOM signal
+
+required:
+ - compatible
+ - reg
+ - 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
+
+unevaluatedProperties: 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