linux-kernel - [PATCH 2/3] dt-bindings: auxdisplay: Add JHD1313 bindings

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Message-Id: <20191128105508.3916-3-kbingham@kernel.org>
Date:   Thu, 28 Nov 2019 10:55:07 +0000
From:   kbingham@...nel.org
To:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Miguel Ojeda Sandonis <miguel.ojeda.sandonis@...il.com>,
        Simon Goda <simon.goda@...los.com>
Cc:     Kieran Bingham <kbingham@...nel.org>
Subject: [PATCH 2/3] dt-bindings: auxdisplay: Add JHD1313 bindings

From: Kieran Bingham <kbingham@...nel.org>

The JHD1313 is used in the Grove RGB LCD controller [0] and provides
an I2C interface to control the LCD.

The implementation is based upon the datasheet for the JHD1214 [1], as
this is the only datasheet referenced by the documentation for the Grove
part.

[0] http://wiki.seeedstudio.com/Grove-LCD_RGB_Backlight/
[1] https://seeeddoc.github.io/Grove-LCD_RGB_Backlight/res/JHD1214Y_YG_1.0.pdf

Signed-off-by: Simon Goda <simon.goda@...los.com>
Signed-off-by: Kieran Bingham <kbingham@...nel.org>
---
 .../bindings/auxdisplay/jhd,jhd1313.yaml      | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/auxdisplay/jhd,jhd1313.yaml

diff --git a/Documentation/devicetree/bindings/auxdisplay/jhd,jhd1313.yaml b/Documentation/devicetree/bindings/auxdisplay/jhd,jhd1313.yaml
new file mode 100644
index 000000000000..b799a91846d2
--- /dev/null
+++ b/Documentation/devicetree/bindings/auxdisplay/jhd,jhd1313.yaml
@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/auxdisplay/jhd,jhd1313.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: DT bindings for the JHD1313 Character LCD Controller
+
+description:
+  The JHD1313 Character LCD Controller is used by the widely available Grove
+  LCD RGB Backlight display. This currently supports only 16x2 LCD Modules. The
+  reg property specifies the I2C address of the module, and is expected to be
+  0x3e.
+
+maintainers:
+  - Kieran Bingham <kbingham@...nel.org>
+
+properties:
+  compatible:
+    const: jhd,jhd1313
+
+  reg: true
+
+required:
+ - compatible
+ - reg
+
+examples:
+ - |
+    auxdisplay: lcd@3e {
+        compatible = "jhd,jhd1313";
+        reg = <0x3e>;
+    };
-- 
2.20.1