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Message-ID: <20240526105136.721529-2-paroga@paroga.com>
Date: Sun, 26 May 2024 12:51:29 +0200
From: Patrick Gansterer <paroga@...oga.com>
To: dri-devel@...ts.freedesktop.org,
linux-leds@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-fbdev@...r.kernel.org
Cc: Patrick Gansterer <paroga@...oga.com>,
Lee Jones <lee@...nel.org>,
Daniel Thompson <daniel.thompson@...aro.org>,
Jingoo Han <jingoohan1@...il.com>,
Pavel Machek <pavel@....cz>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Helge Deller <deller@....de>,
Sam Ravnborg <sam@...nborg.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v6 1/2] dt-bindings: backlight: Add Texas Instruments LM3509
Add Device Tree bindings for Texas Instruments LM3509 - a
High Efficiency Boost for White LED's and/or OLED Displays
Signed-off-by: Patrick Gansterer <paroga@...oga.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>
---
.../bindings/leds/backlight/ti,lm3509.yaml | 136 ++++++++++++++++++
1 file changed, 136 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml
diff --git a/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml b/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml
new file mode 100644
index 000000000000..482fae71dd53
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml
@@ -0,0 +1,136 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/ti,lm3509.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI LM3509 High Efficiency Boost for White LED's and/or OLED Displays
+
+maintainers:
+ - Patrick Gansterer <paroga@...oga.com>
+
+description:
+ The LM3509 current mode boost converter offers two separate outputs.
+ https://www.ti.com/product/LM3509
+
+properties:
+ compatible:
+ const: ti,lm3509
+
+ reg:
+ maxItems: 1
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ reset-gpios:
+ maxItems: 1
+
+ ti,brightness-rate-of-change-us:
+ description: Brightness Rate of Change in microseconds.
+ enum: [51, 13000, 26000, 52000]
+
+ ti,oled-mode:
+ description: Enable OLED mode.
+ type: boolean
+
+patternProperties:
+ "^led@[01]$":
+ type: object
+ description: Properties for a string of connected LEDs.
+ $ref: common.yaml#
+
+ properties:
+ reg:
+ description:
+ The control register that is used to program the two current sinks.
+ The LM3509 has two registers (BMAIN and BSUB) and are represented
+ as 0 or 1 in this property. The two current sinks can be controlled
+ independently with both registers, or register BMAIN can be
+ configured to control both sinks with the led-sources property.
+ minimum: 0
+ maximum: 1
+
+ label: true
+
+ led-sources:
+ minItems: 1
+ maxItems: 2
+ items:
+ minimum: 0
+ maximum: 1
+
+ default-brightness:
+ minimum: 0
+ maximum: 31
+ default: 18
+
+ max-brightness:
+ minimum: 0
+ maximum: 31
+ default: 31
+
+ required:
+ - reg
+
+ additionalProperties: false
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ backlight@36 {
+ compatible = "ti,lm3509";
+ reg = <0x36>;
+ reset-gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
+
+ ti,oled-mode;
+ ti,brightness-rate-of-change-us = <52000>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led@0 {
+ reg = <0>;
+ led-sources = <0 1>;
+ label = "lcd-backlight";
+ default-brightness = <12>;
+ max-brightness = <31>;
+ };
+ };
+ };
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ backlight@36 {
+ compatible = "ti,lm3509";
+ reg = <0x36>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led@0 {
+ reg = <0>;
+ default-brightness = <12>;
+ };
+
+ led@1 {
+ reg = <1>;
+ default-brightness = <15>;
+ };
+ };
+ };
--
2.45.1
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