diff mbox series

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

Message ID 20240729014311.1746371-2-lanzano.alex@gmail.com
State Not Applicable
Headers show
Series Add driver for Sharp Memory LCD | expand

Checks

Context Check Description
robh/checkpatch success
robh/patch-applied success
robh/dtbs-check warning build log
robh/dt-meta-schema success

Commit Message

Alex Lanzano July 29, 2024, 1:42 a.m. UTC 
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

Comments

Krzysztof Kozlowski July 29, 2024, 6:13 a.m. UTC | #1 
On 29/07/2024 03:42, Alex Lanzano wrote:
> 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>


---

<form letter>
This is an automated instruction, just in case, because many review tags
are being ignored. If you know the process, you can skip it (please do
not feel offended by me posting it here - no bad intentions intended).
If you do not know the process, here is a short explanation:

Please add Acked-by/Reviewed-by/Tested-by tags when posting new
versions, under or above your Signed-off-by tag. Tag is "received", when
provided in a message replied to you on the mailing list. Tools like b4
can help here. However, there's no need to repost patches *only* to add
the tags. The upstream maintainer will do that for tags received on the
version they apply.

https://elixir.bootlin.com/linux/v6.5-rc3/source/Documentation/process/submitting-patches.rst#L577
</form letter>

Best regards,
Krzysztof
diff mbox series

Patch

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";
+        };
+    };
+...