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Message-Id: <20231016150554.27144-1-f.suligoi@asem.it>
Date: Mon, 16 Oct 2023 17:05:54 +0200
From: Flavio Suligoi <f.suligoi@...m.it>
To: Lee Jones <lee@...nel.org>,
Daniel Thompson <daniel.thompson@...aro.org>,
Jingoo Han <jingoohan1@...il.com>,
Helge Deller <deller@....de>, Pavel Machek <pavel@....cz>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: dri-devel@...ts.freedesktop.org, linux-leds@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Flavio Suligoi <f.suligoi@...m.it>
Subject: [PATCH v1] dt-bindings: backlight: add brightness-levels related common properties
Both files pwm-backlight.yaml and led-backlight.yaml contain properties
in common with each other, regarding the brightness levels:
- brightness-levels
- default-brightness-level
These properties can then be moved to backlight/common.yaml.
Signed-off-by: Flavio Suligoi <f.suligoi@...m.it>
---
.../bindings/leds/backlight/common.yaml | 17 ++++++++++++++++
.../leds/backlight/led-backlight.yaml | 19 ++++--------------
.../leds/backlight/pwm-backlight.yaml | 20 ++++---------------
3 files changed, 25 insertions(+), 31 deletions(-)
diff --git a/Documentation/devicetree/bindings/leds/backlight/common.yaml b/Documentation/devicetree/bindings/leds/backlight/common.yaml
index 3b60afbab68b..e0983e44934c 100644
--- a/Documentation/devicetree/bindings/leds/backlight/common.yaml
+++ b/Documentation/devicetree/bindings/leds/backlight/common.yaml
@@ -33,4 +33,21 @@ properties:
due to restrictions in a specific system, such as mounting conditions.
$ref: /schemas/types.yaml#/definitions/uint32
+ brightness-levels:
+ description:
+ Array of distinct brightness levels. The levels must be in the range
+ accepted by the underlying LED device. Typically these are in the range
+ from 0 to 255, but any range starting at 0 will do, as long as they are
+ accepted by the LED.
+ The 0 value means a 0% of brightness (darkest/off), while the last value
+ in the array represents a full 100% brightness (brightest).
+ If this array is not provided, the driver default mapping is used.
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+
+ default-brightness-level:
+ description:
+ The default brightness level (index into the array defined by the
+ "brightness-levels" property).
+ $ref: /schemas/types.yaml#/definitions/uint32
+
additionalProperties: true
diff --git a/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml
index d7b78198abc2..f5554da6bc6c 100644
--- a/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml
+++ b/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml
@@ -16,6 +16,9 @@ description:
can also be used to describe a backlight device controlled by the output of
a LED driver.
+allOf:
+ - $ref: common.yaml#
+
properties:
compatible:
const: led-backlight
@@ -26,25 +29,11 @@ properties:
items:
maxItems: 1
- brightness-levels:
- description:
- Array of distinct brightness levels. The levels must be in the range
- accepted by the underlying LED devices. This is used to translate a
- backlight brightness level into a LED brightness level. If it is not
- provided, the identity mapping is used.
- $ref: /schemas/types.yaml#/definitions/uint32-array
-
- default-brightness-level:
- description:
- The default brightness level (index into the array defined by the
- "brightness-levels" property).
- $ref: /schemas/types.yaml#/definitions/uint32
-
required:
- compatible
- leds
-additionalProperties: false
+unevaluatedProperties: false
examples:
- |
diff --git a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.yaml
index 535690288990..b71f6454a4ac 100644
--- a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.yaml
+++ b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.yaml
@@ -11,6 +11,9 @@ maintainers:
- Daniel Thompson <daniel.thompson@...aro.org>
- Jingoo Han <jingoohan1@...il.com>
+allOf:
+ - $ref: common.yaml#
+
properties:
compatible:
const: pwm-backlight
@@ -39,21 +42,6 @@ properties:
Delay in ms between disabling the backlight using GPIO and setting PWM
value to 0.
- brightness-levels:
- description:
- Array of distinct brightness levels. Typically these are in the range
- from 0 to 255, but any range starting at 0 will do. The actual brightness
- level (PWM duty cycle) will be interpolated from these values. 0 means a
- 0% duty cycle (darkest/off), while the last value in the array represents
- a 100% duty cycle (brightest).
- $ref: /schemas/types.yaml#/definitions/uint32-array
-
- default-brightness-level:
- description:
- The default brightness level (index into the array defined by the
- "brightness-levels" property).
- $ref: /schemas/types.yaml#/definitions/uint32
-
num-interpolated-steps:
description:
Number of interpolated steps between each value of brightness-levels
@@ -69,7 +57,7 @@ required:
- compatible
- pwms
-additionalProperties: false
+unevaluatedProperties: false
examples:
- |
--
2.34.1
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