linux-kernel - [PATCH v3 2/9] dt-bindings: nvmem: sfp: Add clock properties

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Date:   Thu, 28 Apr 2022 14:16:56 -0400
From:   Sean Anderson <sean.anderson@...o.com>
To:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Cc:     Li Yang <leoyang.li@....com>, linux-kernel@...r.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Michael Walle <michael@...le.cc>, Andrew Lunn <andrew@...n.ch>,
        Sean Anderson <sean.anderson@...o.com>
Subject: [PATCH v3 2/9] dt-bindings: nvmem: sfp: Add clock properties

To program fuses, it is necessary to set the fuse programming time. This
is determined based on the value of the platform clock. Add a clock
property.

Because this property is necessary for programming, it is made
mandatory. Since these bindings have not yet been present in a stable
release (though they are on track for 5.18), it is not an ABI break to
change them in this manner.

Signed-off-by: Sean Anderson <sean.anderson@...o.com>
---
This patch causes CI to fail. It will be fixed by patch 5.

Changes in v3:
- Update commit message to note that this binding has not yet been
  present in a relase, so it is OK to make otherwise breaking changes.

 .../bindings/nvmem/fsl,layerscape-sfp.yaml         | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/nvmem/fsl,layerscape-sfp.yaml b/Documentation/devicetree/bindings/nvmem/fsl,layerscape-sfp.yaml
index b7798e903191..54086f50157d 100644
--- a/Documentation/devicetree/bindings/nvmem/fsl,layerscape-sfp.yaml
+++ b/Documentation/devicetree/bindings/nvmem/fsl,layerscape-sfp.yaml
@@ -24,15 +24,29 @@ properties:
   reg:
     maxItems: 1
 
+  clocks:
+    maxItems: 1
+    description:
+      The SFP clock. Typically, this is the platform clock divided by 4.
+
+  clock-names:
+    const: sfp
+
 required:
   - compatible
   - reg
+  - clock-names
+  - clocks
 
 unevaluatedProperties: false
 
 examples:
   - |
+    #include <dt-bindings/clock/fsl,qoriq-clockgen.h>
     efuse@...0000 {
         compatible = "fsl,ls1028a-sfp";
         reg = <0x1e80000 0x8000>;
+        clocks = <&clockgen QORIQ_CLK_PLATFORM_PLL
+                            QORIQ_CLK_PLL_DIV(4)>;
+        clock-names = "sfp";
     };
-- 
2.35.1.1320.gc452695387.dirty