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charset="utf-8" Message-Id: <20261107-lm3630a-led-max-microamp-v1-1-ec9e441d9b2c@gmail.com> References: <20261107-lm3630a-led-max-microamp-v1-0-ec9e441d9b2c@gmail.com> In-Reply-To: <20261107-lm3630a-led-max-microamp-v1-0-ec9e441d9b2c@gmail.com> To: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Griffin Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Helge Deller Cc: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, Michiel van Beers X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1794053659; l=1673; i=michielvanbeers@gmail.com; s=20261107; h=from:subject:message-id; bh=U0pqMu8uqXgPZkbtID2FcYS33LaVbFy5/+tEgfo7Mus=; b=4xHPhDvtsA3W1B22S+Zw7XWK+Y7rNMjjZrPreUNRCyWsFbfIQ7bT7pvr7QuKz5nYLUAMBLL3Q CAIwNRmh1UnAfEvIQCISm1jQLVlQ8Yr/37RlxxFc+au1Knk4XmjZhaD X-Developer-Key: i=michielvanbeers@gmail.com; a=ed25519; pk=C+lOje7u3+2x3o2NLMXrwz2veP2++eXfIi9MtYsUo4k= X-Endpoint-Received: by B4 Relay for michielvanbeers@gmail.com/20261107 with auth_id=1444 X-Original-From: Michiel van Beers Reply-To: michielvanbeers@gmail.com Content-Transfer-Encoding: 7bit From: Michiel van Beers The LM3630A has a full-scale current setting per control bank, from 5 mA to 28.25 mA in steps of 750 uA. Boards whose LED strings are rated for less than the chip default of 28.25 mA have no way to describe that limit. Add the common led-max-microamp property to the led@0 and led@1 nodes. The property is optional, so existing devicetrees remain valid. Signed-off-by: Michiel van Beers --- .../devicetree/bindings/leds/backlight/lm3630a-backlight.yaml | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml index 6393cbf3afdf..a031679d5468 100644 --- a/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml +++ b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml @@ -77,6 +77,14 @@ patternProperties: minimum: 0 maximum: 255 + led-max-microamp: + description: + Full-scale current of the LED strings driven by this control bank. + The LM3630A sets it from 5 mA to 28.25 mA in steps of 750 uA. + minimum: 5000 + maximum: 28250 + default: 28250 + ti,linear-mapping-mode: description: | Enable linear mapping mode. If disabled, then it will use exponential @@ -112,6 +120,7 @@ examples: label = "lcd-backlight"; default-brightness = <200>; max-brightness = <255>; + led-max-microamp = <20000>; }; }; }; -- 2.43.0