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Message-Id: <20190424092505.6578-3-masneyb@onstation.org>
Date: Wed, 24 Apr 2019 05:25:04 -0400
From: Brian Masney <masneyb@...tation.org>
To: lee.jones@...aro.org, daniel.thompson@...aro.org,
jingoohan1@...il.com, robh+dt@...nel.org
Cc: jacek.anaszewski@...il.com, pavel@....cz, mark.rutland@....com,
b.zolnierkie@...sung.com, dri-devel@...ts.freedesktop.org,
linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
dmurphy@...com, jonathan@...ek.ca, Rob Herring <robh@...nel.org>
Subject: [PATCH v6 2/3] dt-bindings: backlight: add lm3630a bindings
Add new backlight bindings for the TI LM3630A dual-string white LED.
Signed-off-by: Brian Masney <masneyb@...tation.org>
Reviewed-by: Rob Herring <robh@...nel.org>
---
Changes since v5:
- Change 'lm3630a_bl@38' in examples to 'led-controller@38'
Changes since v4:
- Drop $ref from led-sources
- Drop description from reg of i2c address
- Expand description of reg for the control bank
- Drop status from examples
Changes since v3:
- Add label. I didn't add a description for it since that'll come from
the common properties once its converted.
Changes since v2:
- Update description of max-brightness
- Add description for reg
- Correct typo: s/tranisiton/transition
- add reg to control banks
- add additionalProperties
.../leds/backlight/lm3630a-backlight.yaml | 129 ++++++++++++++++++
1 file changed, 129 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
diff --git a/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
new file mode 100644
index 000000000000..4d61fe0a98a4
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
@@ -0,0 +1,129 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/lm3630a-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI LM3630A High-Efficiency Dual-String White LED
+
+maintainers:
+ - Lee Jones <lee.jones@...aro.org>
+ - Daniel Thompson <daniel.thompson@...aro.org>
+ - Jingoo Han <jingoohan1@...il.com>
+
+description: |
+ The LM3630A is a current-mode boost converter which supplies the power and
+ controls the current in up to two strings of 10 LEDs per string.
+ https://www.ti.com/product/LM3630A
+
+properties:
+ compatible:
+ const: ti,lm3630a
+
+ reg:
+ maxItems: 1
+
+ ti,linear-mapping-mode:
+ description: |
+ Enable linear mapping mode. If disabled, then it will use exponential
+ mapping mode in which the ramp up/down appears to have a more uniform
+ transition to the human eye.
+ type: boolean
+
+required:
+ - compatible
+ - reg
+
+patternProperties:
+ "^led@[01]$":
+ type: object
+ description: |
+ Properties for a string of connected LEDs.
+
+ properties:
+ reg:
+ description: |
+ The control bank that is used to program the two current sinks. The
+ LM3630A has two control banks (A and B) and are represented as 0 or 1
+ in this property. The two current sinks can be controlled
+ independently with both banks, or bank A can be configured to control
+ both sinks with the led-sources property.
+ maxItems: 1
+ minimum: 0
+ maximum: 1
+
+ label:
+ maxItems: 1
+
+ led-sources:
+ allOf:
+ - minItems: 1
+ maxItems: 2
+ items:
+ minimum: 0
+ maximum: 1
+
+ default-brightness:
+ description: Default brightness level on boot.
+ minimum: 0
+ maximum: 255
+
+ max-brightness:
+ description: Maximum brightness that is allowed during runtime.
+ minimum: 0
+ maximum: 255
+
+ required:
+ - reg
+
+ additionalProperties: false
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led-controller@38 {
+ compatible = "ti,lm3630a";
+ reg = <0x38>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led@0 {
+ reg = <0>;
+ led-sources = <0 1>;
+ label = "lcd-backlight";
+ default-brightness = <200>;
+ max-brightness = <255>;
+ };
+ };
+ };
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led-controller@38 {
+ compatible = "ti,lm3630a";
+ reg = <0x38>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led@0 {
+ reg = <0>;
+ default-brightness = <150>;
+ ti,linear-mapping-mode;
+ };
+
+ led@1 {
+ reg = <1>;
+ default-brightness = <225>;
+ ti,linear-mapping-mode;
+ };
+ };
+ };
--
2.20.1
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