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Message-ID: <20251026123923.1531727-2-caojunjie650@gmail.com>
Date: Sun, 26 Oct 2025 20:39:22 +0800
From: Junjie Cao <caojunjie650@...il.com>
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>
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,
Junjie Cao <caojunjie650@...il.com>
Subject: [PATCH 1/2] dt-bindings: leds: backlight: Add Awinic AW99706 backlight
Add Awinic AW99706 backlight binding documentation.
Signed-off-by: Junjie Cao <caojunjie650@...il.com>
---
.../leds/backlight/awinic,aw99706.yaml | 135 ++++++++++++++++++
1 file changed, 135 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/backlight/awinic,aw99706.yaml
diff --git a/Documentation/devicetree/bindings/leds/backlight/awinic,aw99706.yaml b/Documentation/devicetree/bindings/leds/backlight/awinic,aw99706.yaml
new file mode 100644
index 000000000..640af3891
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/awinic,aw99706.yaml
@@ -0,0 +1,135 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/awinic,aw99706.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Awinic AW99706 6-channel WLED Backlight Driver
+
+maintainers:
+ - Junjie Cao <caojunjie650@...il.com>
+
+allOf:
+ - $ref: common.yaml#
+
+properties:
+ compatible:
+ const: awinic,aw99706
+
+ reg:
+ maxItems: 1
+
+ enable-gpios:
+ description: GPIO to use to enable/disable the backlight (HWEN pin).
+ maxItems: 1
+
+ awinic,dim-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: >
+ Select dimming mode of the device.
+ 0 = Bypass mode.
+ 1 = DC mode.
+ 2 = MIX mode.
+ 3 = MIX-26k.
+ enum: [0, 1, 2, 3]
+ default: 1
+
+ awinic,sw-freq:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Boost switching frequency in kHz.
+ enum: [300, 400, 500, 600, 660, 750, 850, 1000, 1200, 1330, 1500, 1700]
+ default: 750
+
+ awinic,sw-ilmt:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Switching current limitation in mA.
+ enum: [1500, 2000, 2500, 3000]
+ default: 3000
+
+ awinic,iled-max:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Maximum LED current setting in uA.
+ minimum: 5000
+ maximum: 50000
+ multipleOf: 500
+ default: 20000
+
+ awinic,uvlo-thres:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: UVLO(Under Voltage Lock Out) in mV.
+ enum: [2200, 5000]
+ default: 2200
+
+ awinic,fade-time:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Fade In/Out Time(per step) in us.
+ enum: [8, 16, 32, 64, 128, 256, 512, 1024]
+ default: 16
+
+ awinic,slope-time:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Slope time in ms.
+ enum: [8, 24, 48, 96, 200, 300, 400, 500]
+ default: 300
+
+ awinic,ramp-ctl:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: >
+ Select ramp control and filter of the device.
+ 0 = Fade in/fade out.
+ 1 = Light filter.
+ 2 = Medium filter.
+ 3 = Heavy filter.
+ enum: [0, 1, 2, 3]
+ default: 2
+
+ awinic,brt-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: >
+ Select brightness control of the device.
+ 0 = PWM.
+ 1 = IIC.
+ 2 = IIC x PWM.
+ 3 = IIC x PWM(P-ramp).
+ enum: [0, 1, 2, 3]
+ default: 1
+
+ awinic,onoff-time:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Turn on/off time(per step) in ns.
+ enum: [250, 500, 1000, 2000, 4000, 8000, 16000]
+ default: 2000
+
+required:
+ - compatible
+ - reg
+ - enable-gpios
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ aw99706@76 {
+ compatible = "awinic,aw99706";
+ reg = <0x76>;
+ enable-gpios = <&tlmm 88 GPIO_ACTIVE_HIGH>;
+ awinic,dim-mode = <1>;
+ awinic,sw-ilmt = <3000>;
+ awinic,sw-freq = <750>;
+ awinic,uvlo-thres = <2200>;
+ awinic,iled-max = <23500>;
+ awinic,ramp-ctl = <2>;
+ awinic,slope-time = <96>;
+ awinic,fade-time = <16>;
+ awinic,brt-mode = <1>;
+ awinic,onoff-time = <2000>;
+ };
+ };
+
+...
--
2.51.1.dirty
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