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Message-Id: <20250925-arctic-sand-v1-1-735b5ed8faed@thegoodpenguin.co.uk>
Date: Thu, 25 Sep 2025 14:57:58 +0100
From: Harrison Carter <hcarter@...goodpenguin.co.uk>
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>, Brian Dodge <bdodge@...ticsand.com>
Cc: dri-devel@...ts.freedesktop.org, linux-leds@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Harrison Carter <hcarter@...goodpenguin.co.uk>
Subject: [PATCH] dt-bindings: leds: arc,arc2c0608: Convert to DT Schema
Convert the ArcticSand arc2c0608 LED driver to the dt-schema.
Signed-off-by: Harrison Carter <hcarter@...goodpenguin.co.uk>
---
Maintainer set to the author of the arcxcnn_bl.c file
---
.../bindings/leds/backlight/arc,arc2c0608.yaml | 108 +++++++++++++++++++++
.../bindings/leds/backlight/arcxcnn_bl.txt | 33 -------
2 files changed, 108 insertions(+), 33 deletions(-)
diff --git a/Documentation/devicetree/bindings/leds/backlight/arc,arc2c0608.yaml b/Documentation/devicetree/bindings/leds/backlight/arc,arc2c0608.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..786beced5590bb38b9c864111f7b66302d4c63ec
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/arc,arc2c0608.yaml
@@ -0,0 +1,108 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/arc,arc2c0608.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ArcticSand arc2c0608 LED driver
+
+description: |
+ The ArcticSand arc2c0608 LED driver provides ultra
+ efficient notebook backlighting. Optional properties not
+ specified will default to values in IC EPROM.
+
+ Datasheet:
+ https://www.murata.com/-/media/webrenewal/products/power/power-semiconductor/overview/lineup/led-boost/arc2/arc2c0608.ashx.
+
+maintainers:
+ - Brian Dodge <bdodge@...ticsand.com>
+
+allOf:
+ - $ref: /schemas/leds/common.yaml
+
+properties:
+ compatible:
+ const: arc,arc2c0608
+
+ reg:
+ maxItems: 1
+
+ default-brightness:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 0
+ maximum: 4095
+
+ led-sources:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description: List of enabled channels
+ items:
+ enum: [0, 1, 2, 3, 4, 5]
+ minItems: 1
+ uniqueItems: true
+
+ arc,led-config-0:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Fading speed (period between intensity
+ steps)
+
+ arc,led-config-1:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: If set, sets ILED_CONFIG register. Used for
+ fine tuning the maximum LED current.
+
+ arc,dim-freq:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: PWM mode frequency setting (bits [3:0] used)
+
+ arc,comp-config:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Setting for register CONFIG_COMP which
+ controls internal resitances, feed forward freqs,
+ and initial VOUT at startup. Consult the datasheet.
+
+ arc,filter-config:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: RC and PWM Filter settings.
+ Bit Assignment
+ 7654 3 2 1 0
+ xxxx RCF1 RCF0 PWM1 PWM0
+ RCF statuses PWM Filter Statues
+ 00 = OFF (default) 00 = OFF (default)
+ 01 = LOW 01 = 2 STEPS
+ 10 - MEDIUM 10 = 4 STEPS
+ 11 = HIGH 11 = 8 STEPS
+
+ arc,trim-config:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Sets percentage increase of Maximum LED
+ Current.
+ 0x00 = 0% increase.
+ 0x20 = 20.2%.
+ 0x3F = 41.5%
+
+ label: true
+
+ linux,default-trigger: true
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led-controller@30 {
+ compatible = "arc,arc2c0608";
+ reg = <0x30>;
+ default-brightness = <500>;
+ label = "lcd-backlight";
+ linux,default-trigger = "backlight";
+ led-sources = <0 1 2 5>;
+ };
+ };
+...
diff --git a/Documentation/devicetree/bindings/leds/backlight/arcxcnn_bl.txt b/Documentation/devicetree/bindings/leds/backlight/arcxcnn_bl.txt
deleted file mode 100644
index 230abdefd6e7be20b470c3790e74c4d26d084ee8..0000000000000000000000000000000000000000
--- a/Documentation/devicetree/bindings/leds/backlight/arcxcnn_bl.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-Binding for ArcticSand arc2c0608 LED driver
-
-Required properties:
-- compatible: should be "arc,arc2c0608"
-- reg: slave address
-
-Optional properties:
-- default-brightness: brightness value on boot, value from: 0-4095
-- label: The name of the backlight device
- See Documentation/devicetree/bindings/leds/common.txt
-- led-sources: List of enabled channels from 0 to 5.
- See Documentation/devicetree/bindings/leds/common.txt
-
-- arc,led-config-0: setting for register ILED_CONFIG_0
-- arc,led-config-1: setting for register ILED_CONFIG_1
-- arc,dim-freq: PWM mode frequence setting (bits [3:0] used)
-- arc,comp-config: setting for register CONFIG_COMP
-- arc,filter-config: setting for register FILTER_CONFIG
-- arc,trim-config: setting for register IMAXTUNE
-
-Note: Optional properties not specified will default to values in IC EPROM
-
-Example:
-
-arc2c0608@30 {
- compatible = "arc,arc2c0608";
- reg = <0x30>;
- default-brightness = <500>;
- label = "lcd-backlight";
- linux,default-trigger = "backlight";
- led-sources = <0 1 2 5>;
-};
-
---
base-commit: 76eeb9b8de9880ca38696b2fb56ac45ac0a25c6c
change-id: 20250911-arctic-sand-dac8ebaa3d42
Best regards,
--
Harrison Carter <hcarter@...goodpenguin.co.uk>
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