linux-kernel - [PATCH 1/4] dt-bindings: backlight: Add max25014 bindings

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Message-Id: <20250725-max25014-v1-1-0e8cce92078e@gocontroll.com>
Date: Fri, 25 Jul 2025 13:09:23 +0200
From: Maud Spierings via B4 Relay <devnull+maudspierings.gocontroll.com@...nel.org>
To: Lee Jones <lee@...nel.org>, Daniel Thompson <danielt@...nel.org>, 
 Jingoo Han <jingoohan1@...il.com>, Pavel Machek <pavel@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Helge Deller <deller@....de>, 
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: dri-devel@...ts.freedesktop.org, linux-leds@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-fbdev@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, 
 Maud Spierings <maudspierings@...ontroll.com>
Subject: [PATCH 1/4] dt-bindings: backlight: Add max25014 bindings

From: Maud Spierings <maudspierings@...ontroll.com>

The Maxim MAX25014 is a 4-channel automotive grade backlight driver IC
with intgrated boost controller.

Signed-off-by: Maud Spierings <maudspierings@...ontroll.com>
---
 .../bindings/leds/backlight/maxim,max25014.yaml    | 78 ++++++++++++++++++++++
 MAINTAINERS                                        |  5 ++
 2 files changed, 83 insertions(+)

diff --git a/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml b/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..63baf1cbcbb14ed93d7e45ba013080872060ce71
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml
@@ -0,0 +1,78 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/maxim,max25014.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim max25014 backlight controller
+
+maintainers:
+  - Maud Spierings <maudspierings@...ontroll.com>
+
+allOf:
+  - $ref: common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - maxim,max25014
+
+  reg:
+    maxItems: 1
+
+  enable-gpios:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  power-supply:
+    description: Regulator which controls the boost converter input rail.
+
+  pwms:
+    maxItems: 1
+
+  maxim,iset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 11
+    description:
+      Value of the ISET register field (0-15). Default is 11.
+
+  maxim,strings:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      A 4-bit bitfield that describes which led strings to turn on.
+    minItems: 4
+    maxItems: 4
+
+required:
+  - compatible
+  - reg
+  - maxim,strings
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        backlight: backlight@6f {
+            reg = <0x6f>;
+            compatible = "maxim,max25014";
+            bl-name = "max25014";
+            default-brightness = <50>;
+            enable-gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
+            interrupt-parent = <&gpio1>;
+            interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&pinctrl_backlight>;
+            maxim,iset = <7>;
+            maxim,strings = <1 1 1 1>;
+        };
+    };
+
diff --git a/MAINTAINERS b/MAINTAINERS
index 5e18349a5556e4d793b63a6b3c600000b21b0418..9e9a45442b7bf60b00eaf3f8ebadf8f4fbaf3bef 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14907,6 +14907,11 @@ F:	Documentation/userspace-api/media/drivers/max2175.rst
 F:	drivers/media/i2c/max2175*
 F:	include/uapi/linux/max2175.h
 
+MAX25014 BACKLIGHT DRIVER
+M:	Maud Spierings <maudspierings@...ontroll.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml
+
 MAX31335 RTC DRIVER
 M:	Antoniu Miclaus <antoniu.miclaus@...log.com>
 L:	linux-rtc@...r.kernel.org

-- 
2.50.1