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@paroga.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
---
.../bindings/leds/backlight/ti,lm3509.yaml | 139 ++++++++++++++++++
1 file changed, 139 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..b67f67648852
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml
@@ -0,0 +1,139 @@
+# 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@paroga.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.
+
+ allOf:
+ - $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:
+ allOf:
+ - 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>;
+ };
+ };
+ };
--
2.44.0On Sat, Mar 30, 2024 at 03:59:24PM +0100, Patrick Gansterer wrote: > 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@paroga.com> > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> > Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> > --- > .../bindings/leds/backlight/ti,lm3509.yaml | 139 ++++++++++++++++++ > 1 file changed, 139 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..b67f67648852 > --- /dev/null > +++ b/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml > @@ -0,0 +1,139 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/leds/backlight/ti,lm3509.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: TI LM3509 High Efficiency Boost for White LED's and/or OLED Displays > + > +maintainers: > + - Patrick Gansterer <paroga@paroga.com> > + > +description: > + The LM3509 current mode boost converter offers two separate outputs. > + https://www.ti.com/product/LM3509 > + > +properties: > + compatible: > + const: ti,lm3509 > + > + reg: > + maxItems: 1 > + > + "#address-cells": > + const: 1 > + > + "#size-cells": > + const: 0 > + > + reset-gpios: > + maxItems: 1 > + > + ti,brightness-rate-of-change-us: > + description: Brightness Rate of Change in microseconds. > + enum: [51, 13000, 26000, 52000] > + > + ti,oled-mode: > + description: Enable OLED mode. > + type: boolean > + > +patternProperties: > + "^led@[01]$": > + type: object > + description: Properties for a string of connected LEDs. > + > + allOf: You don't need allOf here. > + - $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: > + allOf: Or here. > + - minItems: 1 > + maxItems: 2 > + items: > + minimum: 0 > + maximum: 1
© 2016 - 2026 Red Hat, Inc.