linux-kernel - [PATCH RESEND v1 2/7] dt-bindings: can: mpfs: add missing required clock

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Date:   Fri,  8 Dec 2023 17:12:24 +0000
From:   Conor Dooley <conor@...nel.org>
To:     linux-riscv@...ts.infradead.org
Cc:     conor@...nel.org, Conor Dooley <conor.dooley@...rochip.com>,
        Daire McNamara <daire.mcnamara@...rochip.com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-can@...r.kernel.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: [PATCH RESEND v1 2/7] dt-bindings: can: mpfs: add missing required clock

From: Conor Dooley <conor.dooley@...rochip.com>

The CAN controller on PolarFire SoC has an AHB peripheral clock _and_ a
CAN bus clock. The bus clock was omitted when the binding was written,
but is required for operation. Make up for lost time and add it.

Cautionary tale in adding bindings without having implemented a real
user for them perhaps.

Fixes: c878d518d7b6 ("dt-bindings: can: mpfs: document the mpfs CAN controller")
Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
 .../devicetree/bindings/net/can/microchip,mpfs-can.yaml    | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/can/microchip,mpfs-can.yaml b/Documentation/devicetree/bindings/net/can/microchip,mpfs-can.yaml
index 45aa3de7cf01..05f680f15b17 100644
--- a/Documentation/devicetree/bindings/net/can/microchip,mpfs-can.yaml
+++ b/Documentation/devicetree/bindings/net/can/microchip,mpfs-can.yaml
@@ -24,7 +24,10 @@ properties:
     maxItems: 1
 
   clocks:
-    maxItems: 1
+    maxItems: 2
+    items:
+      - description: AHB peripheral clock
+      - description: CAN bus clock
 
 required:
   - compatible
@@ -39,7 +42,7 @@ examples:
     can@...0c000 {
         compatible = "microchip,mpfs-can";
         reg = <0x2010c000 0x1000>;
-        clocks = <&clkcfg 17>;
+        clocks = <&clkcfg 17>, <&clkcfg 37>;
         interrupt-parent = <&plic>;
         interrupts = <56>;
     };
-- 
2.39.2