linux-kernel - [PATCH 2/3] dt-bindings: backlight: lm3630a: add entries to control boost frequency

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Message-Id: <20230602-lm3630a_boost_frequency-v1-2-076472036d1a@mweigand.net>
Date:   Wed, 14 Jun 2023 21:08:53 +0200
From:   Maximilian Weigand <mweigand2017@...il.com>
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>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org,
        Maximilian Weigand <mweigand@...igand.net>
Subject: [PATCH 2/3] dt-bindings: backlight: lm3630a: add entries to
 control boost frequency

From: Maximilian Weigand <mweigand@...igand.net>

Add 'ti,boost_use_1mhz' to switch between 500 kHz and 1 MHz boost
converter switching frequency, and add 'ti,boost_frequency_shift' to
activate a frequency shift to 560 kHz or 1.12 MHz, respectively.

Signed-off-by: Maximilian Weigand <mweigand@...igand.net>
---
 .../bindings/leds/backlight/lm3630a-backlight.yaml           | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
index 3c9b4054ed9a..ef7ea0ad2d25 100644
--- a/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
+++ b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
@@ -33,6 +33,18 @@ properties:
     description: GPIO to use to enable/disable the backlight (HWEN pin).
     maxItems: 1
 
+  ti,boost_use_1mhz:
+    description: |
+      If present, change the boost converter switching frequency from the
+      default 500 kHz to 1 MHz. Refer to data sheet for hardware requirements.
+    type: boolean
+
+  ti,boost_frequency_shift:
+    description: |
+      If present, change boost converter switching frequency from 500 kHz to
+      560 kHz or from 1 Mhz to 1.12 Mhz, respectively.
+    type: boolean
+
 required:
   - compatible
   - reg

-- 
2.39.2