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From: "Peng Fan (OSS)" <peng.fan@oss.nxp.com>
To: Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	 Conor Dooley <conor+dt@kernel.org>, Frank Li <Frank.Li@nxp.com>,
	 Sascha Hauer <s.hauer@pengutronix.de>,
	 Pengutronix Kernel Team <kernel@pengutronix.de>,
	 Fabio Estevam <festevam@gmail.com>,
	"A.s. Dong" <aisheng.dong@nxp.com>
Cc: devicetree@vger.kernel.org, imx@lists.linux.dev,
	 linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,  Peng Fan <peng.fan@nxp.com>,
	 Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Subject: [PATCH v3 1/2] dt-bindings: fsl: imx7ulp-smc1: Add #clock-cells property
Date: Mon, 02 Mar 2026 23:07:41 +0800	[thread overview]
Message-ID: <20260302-imx7ulp-v3-1-26b708aecc59@nxp.com> (raw)
In-Reply-To: <20260302-imx7ulp-v3-0-26b708aecc59@nxp.com>

From: Peng Fan <peng.fan@nxp.com>

The SMC1 block on i.MX7ULP is already used as a clock provider in
imx7ulp.dtsi, but the corresponding dt-binding schema does not define
the required '#clock-cells' property. This results in CHECK_DTBS schema
validation errors.

Functionally, SMC1 controls the CPU run mode configuration:
  - 00b: Normal Run (RUN)
  - 10b: Very-Low-Power Run (VLPR)
  - 11b: High-Speed Run (HSRUN)

These run modes determine the effective CPU operating point, and their
programming is tied to the OPP table.

Add the missing `#clock-cells` definition so the dt-binding schema is
consistent with the DTS and validates correctly.

Fixes: 8ba41d6bd9893 ("dt-bindings: fsl: Convert i.MX7ULP PM to json-schema")
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 Documentation/devicetree/bindings/arm/freescale/fsl,imx7ulp-pm.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,imx7ulp-pm.yaml b/Documentation/devicetree/bindings/arm/freescale/fsl,imx7ulp-pm.yaml
index 9d377e193c123c7de0ec4db4d4a649ed966b2d9a..7ad470260c0d08bd1e7146ef49e5f60dd6c6d4d7 100644
--- a/Documentation/devicetree/bindings/arm/freescale/fsl,imx7ulp-pm.yaml
+++ b/Documentation/devicetree/bindings/arm/freescale/fsl,imx7ulp-pm.yaml
@@ -28,6 +28,9 @@ properties:
   reg:
     maxItems: 1
 
+  '#clock-cells':
+    const: 1
+
   clocks:
     maxItems: 2
 
@@ -39,6 +42,7 @@ properties:
 required:
   - compatible
   - reg
+  - '#clock-cells'
 
 additionalProperties: false
 
@@ -47,4 +51,5 @@ examples:
     smc1@40410000 {
         compatible = "fsl,imx7ulp-smc1";
         reg = <0x40410000 0x1000>;
+        #clock-cells = <1>;
     };

-- 
2.37.1


  reply	other threads:[~2026-03-02 15:06 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-02 15:07 [PATCH v3 0/2] ARM: dts: Add CPU clock and OPP table for i.MX7ULP Peng Fan (OSS)
2026-03-02 15:07 ` Peng Fan (OSS) [this message]
2026-03-02 15:07 ` [PATCH v3 2/2] ARM: dts: imx7ulp: Add CPU clock and OPP table support Peng Fan (OSS)
2026-03-09 16:12 ` (subset) [PATCH v3 0/2] ARM: dts: Add CPU clock and OPP table for i.MX7ULP Frank Li
2026-03-09 16:16 ` Frank Li

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