linux-kernel - [PATCH 1/2] dt-bindings: display: Add Sharp LS027B7DH01 Memory LCD

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Message-ID: <2a7c51b6e619c02ec175a5c219b0a0fd7a24499d.1701267411.git.mehdi.djait@bootlin.com>
Date:   Wed, 29 Nov 2023 15:29:09 +0100
From:   Mehdi Djait <mehdi.djait@...tlin.com>
To:     mripard@...nel.org, maarten.lankhorst@...ux.intel.com,
        tzimmermann@...e.de, airlied@...il.com, daniel@...ll.ch,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        conor+dt@...nel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        thomas.petazzoni@...tlin.com, alexandre.belloni@...tlin.com,
        luca.ceresoli@...tlin.com, paul.kocialkowski@...tlin.com,
        dri-devel@...ts.freedesktop.org, geert@...ux-m68k.org,
        Mehdi Djait <mehdi.djait@...tlin.com>
Subject: [PATCH 1/2] dt-bindings: display: Add Sharp LS027B7DH01 Memory LCD

Add device tree bindings for the Sharp LS027B7DH01: a 2.7" 400x240
monochrome display connected over SPI.

Signed-off-by: Mehdi Djait <mehdi.djait@...tlin.com>
---
 .../bindings/display/sharp,ls027b7dh01.yaml   | 71 +++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sharp,ls027b7dh01.yaml

diff --git a/Documentation/devicetree/bindings/display/sharp,ls027b7dh01.yaml b/Documentation/devicetree/bindings/display/sharp,ls027b7dh01.yaml
new file mode 100644
index 000000000000..d0a4efae2827
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sharp,ls027b7dh01.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sharp,ls027b7dh01.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sharp LS027B7DH01 Memory LCD Display
+
+maintainers:
+  - Mehdi Djait <mehdi.djait@...tlin.com>
+
+description:
+  The Sharp LS027B7DH01 is a 2.7" 400x240 monochrome display connected over a
+  SPI bus. The display requires an alternating signal to prevent the buildup of
+  a DC bias that will stop any update. Two modes can be used for the generation
+  of this signal Software by writing to the display or Hardware by supplying the
+  External COM inversion signal.
+
+allOf:
+  - $ref: panel/panel-common.yaml#
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    const: sharp,ls027b7dh01
+
+  reg:
+    maxItems: 1
+
+  spi-cs-high: true
+
+  spi-lsb-first: true
+
+  spi-max-frequency:
+    maximum: 2000000
+
+  enable-gpios:
+    maxItems: 1
+
+  pwms:
+    maxItems: 1
+    description: External COM inversion signal
+
+required:
+  - compatible
+  - reg
+  - spi-lsb-first
+  - enable-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            display@0{
+                    compatible = "sharp,ls027b7dh01";
+                    reg = <0>;
+                    spi-cs-high;
+                    spi-lsb-first;
+                    spi-max-frequency = <2000000>;
+                    enable-gpios = <&gpiof 3 GPIO_ACTIVE_HIGH>;
+                    pwms = <&pwm 1 1000000000 0>;
+            };
+    };
+
+...
-- 
2.41.0