linux-kernel - [PATCH v1 1/8] MT9M114: Add bypass-pll DT-binding

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Message-Id: <20250226153929.274562-2-mathis.foerst@mt.com>
Date: Wed, 26 Feb 2025 16:39:22 +0100
From: Mathis Foerst <mathis.foerst@...com>
To: linux-kernel@...r.kernel.org
Cc: Mathis Foerst <mathis.foerst@...com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	linux-media@...r.kernel.org,
	devicetree@...r.kernel.org,
	manuel.traut@...com
Subject: [PATCH v1 1/8] MT9M114: Add bypass-pll DT-binding

The MT9M114 sensor has an internal PLL that generates the required SYSCLK
from EXTCLK. It also has the option to bypass the PLL and use EXTCLK
directly as SYSCLK.
The current driver implementation uses a hardcoded PLL configuration that
requires a specific EXTCLK frequency. Depending on the available clocks,
it can be desirable to use a different PLL configuration or to bypass it.

Add the 'bypass-pll' property to the MT9M114 DT-bindings to allow selecting
the PLL bypass mode.

Signed-off-by: Mathis Foerst <mathis.foerst@...com>
---
 Documentation/devicetree/bindings/media/i2c/onnn,mt9m114.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/onnn,mt9m114.yaml b/Documentation/devicetree/bindings/media/i2c/onnn,mt9m114.yaml
index f6b87892068a..72e258d57186 100644
--- a/Documentation/devicetree/bindings/media/i2c/onnn,mt9m114.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/onnn,mt9m114.yaml
@@ -70,6 +70,10 @@ properties:
           - bus-type
           - link-frequencies
 
+  onnn,bypass-pll:
+    description: Bypass the internal PLL of the sensor to use EXTCLK directly as SYSCLK.
+    type: boolean
+
 required:
   - compatible
   - reg
-- 
2.34.1