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Message-ID: <20260121235746.370607-1-robh@kernel.org>
Date: Wed, 21 Jan 2026 17:57:45 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Lee Jones <lee@...nel.org>,
Pavel Machek <pavel@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Dan Murphy <dmurphy@...com>
Cc: linux-leds@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: leds: Convert ti,lm3697 to DT schema
Convert the TI LM3697 LED driver binding to DT schema format. It's a
straight-forward conversion.
Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
.../devicetree/bindings/leds/leds-lm3697.txt | 73 ----------
.../devicetree/bindings/leds/ti,lm3697.yaml | 125 ++++++++++++++++++
2 files changed, 125 insertions(+), 73 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/leds/leds-lm3697.txt
create mode 100644 Documentation/devicetree/bindings/leds/ti,lm3697.yaml
diff --git a/Documentation/devicetree/bindings/leds/leds-lm3697.txt b/Documentation/devicetree/bindings/leds/leds-lm3697.txt
deleted file mode 100644
index 221b37b6049b..000000000000
--- a/Documentation/devicetree/bindings/leds/leds-lm3697.txt
+++ /dev/null
@@ -1,73 +0,0 @@
-* Texas Instruments - LM3697 Highly Efficient White LED Driver
-
-The LM3697 11-bit LED driver provides high-
-performance backlight dimming for 1, 2, or 3 series
-LED strings while delivering up to 90% efficiency.
-
-This device is suitable for display and keypad lighting
-
-Required properties:
- - compatible:
- "ti,lm3697"
- - reg : I2C slave address
- - #address-cells : 1
- - #size-cells : 0
-
-Optional properties:
- - enable-gpios : GPIO pin to enable/disable the device
- - vled-supply : LED supply
-
-Required child properties:
- - reg : 0 - LED is Controlled by bank A
- 1 - LED is Controlled by bank B
- - led-sources : Indicates which HVLED string is associated to which
- control bank. This is a zero based property so
- HVLED1 = 0, HVLED2 = 1, HVLED3 = 2.
- Additional information is contained
- in Documentation/devicetree/bindings/leds/common.txt
-
-Optional child properties:
- - ti,brightness-resolution - see Documentation/devicetree/bindings/mfd/ti-lmu.txt
- - ramp-up-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt
- - ramp-down-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt
- - label : see Documentation/devicetree/bindings/leds/common.txt
- - linux,default-trigger :
- see Documentation/devicetree/bindings/leds/common.txt
-
-Example:
-
-HVLED string 1 and 3 are controlled by control bank A and HVLED 2 string is
-controlled by control bank B.
-
-led-controller@36 {
- compatible = "ti,lm3697";
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <0x36>;
-
- enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
- vled-supply = <&vbatt>;
-
- led@0 {
- reg = <0>;
- led-sources = <0 2>;
- ti,brightness-resolution = <2047>;
- ramp-up-us = <5000>;
- ramp-down-us = <1000>;
- label = "white:first_backlight_cluster";
- linux,default-trigger = "backlight";
- };
-
- led@1 {
- reg = <1>;
- led-sources = <1>;
- ti,brightness-resolution = <255>;
- ramp-up-us = <500>;
- ramp-down-us = <1000>;
- label = "white:second_backlight_cluster";
- linux,default-trigger = "backlight";
- };
-}
-
-For more product information please see the link below:
-https://www.ti.com/lit/ds/symlink/lm3697.pdf
diff --git a/Documentation/devicetree/bindings/leds/ti,lm3697.yaml b/Documentation/devicetree/bindings/leds/ti,lm3697.yaml
new file mode 100644
index 000000000000..a9f839470a84
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/ti,lm3697.yaml
@@ -0,0 +1,125 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/ti,lm3697.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI LM3697 Highly Efficient White LED Driver
+
+maintainers:
+ - Dan Murphy <dmurphy@...com>
+
+description: >
+ The LM3697 11-bit LED driver provides high-performance backlight dimming for
+ 1, 2, or 3 series LED strings while delivering up to 90% efficiency.
+
+ This device is suitable for display and keypad lighting.
+
+properties:
+ compatible:
+ const: ti,lm3697
+
+ reg:
+ maxItems: 1
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ enable-gpios:
+ description: GPIO pin to enable or disable the device.
+ maxItems: 1
+
+ vled-supply:
+ description: LED supply for the device.
+
+patternProperties:
+ '^led@[01]$':
+ description: LED control bank nodes.
+ $ref: common.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ description: Control bank selection (0 = bank A, 1 = bank B).
+ maximum: 1
+
+ led-sources:
+ description: >
+ HVLED strings associated with this control bank:
+
+ 0 - HVLED1
+ 1 - HVLED2
+ 2 - HVLED3
+ minItems: 1
+ maxItems: 3
+ items:
+ maximum: 2
+
+ ti,brightness-resolution:
+ description: Brightness resolution for the LED string.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 2047
+
+ ramp-up-us:
+ description: Ramp-up time in microseconds.
+ minimum: 117
+ maximum: 2048
+
+ ramp-down-us:
+ description: Ramp-down time in microseconds.
+ minimum: 117
+ maximum: 2048
+
+ required:
+ - reg
+ - led-sources
+
+required:
+ - compatible
+ - reg
+ - '#address-cells'
+ - '#size-cells'
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led-controller@36 {
+ compatible = "ti,lm3697";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x36>;
+
+ enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
+ vled-supply = <&vbatt>;
+
+ led@0 {
+ reg = <0>;
+ led-sources = <0 2>;
+ ti,brightness-resolution = <2047>;
+ ramp-up-us = <500>;
+ ramp-down-us = <1000>;
+ label = "white:first_backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+
+ led@1 {
+ reg = <1>;
+ led-sources = <1>;
+ ti,brightness-resolution = <255>;
+ ramp-up-us = <500>;
+ ramp-down-us = <1000>;
+ label = "white:second_backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+ };
+ };
--
2.51.0
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