linux-kernel - [PATCH 1/6] dt-bindings: clock: imx8m-anatop: support spread spectrum clocking

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Message-ID: <20240928083804.1073942-2-dario.binacchi@amarulasolutions.com>
Date: Sat, 28 Sep 2024 10:37:49 +0200
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: linux-kernel@...r.kernel.org
Cc: linux-amarula@...rulasolutions.com,
	Dario Binacchi <dario.binacchi@...rulasolutions.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Peng Fan <peng.fan@....com>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	Stephen Boyd <sboyd@...nel.org>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-clk@...r.kernel.org
Subject: [PATCH 1/6] dt-bindings: clock: imx8m-anatop: support spread spectrum clocking

The patch adds the DT bindings for enabling and tuning spread spectrum
clocking generation.

Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
---

 .../bindings/clock/fsl,imx8m-anatop.yaml      | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/fsl,imx8m-anatop.yaml b/Documentation/devicetree/bindings/clock/fsl,imx8m-anatop.yaml
index bbd22e95b319..c91eb4229ed3 100644
--- a/Documentation/devicetree/bindings/clock/fsl,imx8m-anatop.yaml
+++ b/Documentation/devicetree/bindings/clock/fsl,imx8m-anatop.yaml
@@ -32,6 +32,47 @@ properties:
 
   '#clock-cells':
     const: 1
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - fsl,imx8mm-anatop
+
+then:
+  properties:
+    fsl,ssc-clocks:
+      $ref: /schemas/types.yaml#/definitions/phandle-array
+      description:
+        The phandles to the PLLs with spread spectrum clock generation
+        hardware capability.
+      maxItems: 4
+
+    fsl,ssc-modfreq-hz:
+      $ref: /schemas/types.yaml#/definitions/uint32-array
+      description:
+        The values of modulation frequency (Hz unit) of spread spectrum
+        clocking for each PLL.
+      maxItems: 4
+
+    fsl,ssc-modrate-percent:
+      $ref: /schemas/types.yaml#/definitions/uint32-array
+      description:
+        The percentage values of modulation rate of spread spectrum
+        clocking for each PLL.
+      maxItems: 4
+
+    fsl,ssc-modmethod:
+      $ref: /schemas/types.yaml#/definitions/string-array
+      description:
+        The modulation techniques of spread spectrum clocking for
+        each PLL.
+      oneOf:
+        - enum:
+            - down-spread
+            - up-spread
+            - center-spread
+      maxItems: 4
 
 required:
   - compatible
-- 
2.43.0