linux-kernel - [PATCH 1/4] dt-bindings: rng: add st,stm32mp25-rng support

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Message-ID: <20241007132721.168428-2-gatien.chevallier@foss.st.com>
Date: Mon, 7 Oct 2024 15:27:18 +0200
From: Gatien Chevallier <gatien.chevallier@...s.st.com>
To: Olivia Mackall <olivia@...enic.com>,
        Herbert Xu
	<herbert@...dor.apana.org.au>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof
 Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre
 Torgue <alexandre.torgue@...s.st.com>,
        Marek Vasut <marex@...x.de>
CC: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        Lionel Debieve <lionel.debieve@...s.st.com>,
        <linux-crypto@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        Yang
 Yingliang <yangyingliang@...wei.com>,
        Gatien Chevallier
	<gatien.chevallier@...s.st.com>
Subject: [PATCH 1/4] dt-bindings: rng: add st,stm32mp25-rng support

Add RNG STM32MP25x platforms compatible. Update the clock
properties management to support all versions.

Signed-off-by: Gatien Chevallier <gatien.chevallier@...s.st.com>
---
 .../devicetree/bindings/rng/st,stm32-rng.yaml | 41 +++++++++++++++++--
 1 file changed, 38 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/rng/st,stm32-rng.yaml b/Documentation/devicetree/bindings/rng/st,stm32-rng.yaml
index 340d01d481d1..c92ce92b6ac9 100644
--- a/Documentation/devicetree/bindings/rng/st,stm32-rng.yaml
+++ b/Documentation/devicetree/bindings/rng/st,stm32-rng.yaml
@@ -18,12 +18,19 @@ properties:
     enum:
       - st,stm32-rng
       - st,stm32mp13-rng
+      - st,stm32mp25-rng
 
   reg:
     maxItems: 1
 
   clocks:
-    maxItems: 1
+    minItems: 1
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: rng_clk
+      - const: rng_hclk
 
   resets:
     maxItems: 1
@@ -57,15 +64,43 @@ allOf:
       properties:
         st,rng-lock-conf: false
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - st,stm32mp25-rng
+    then:
+      properties:
+        clocks:
+          description: >
+            RNG bus clock must be named "rng_hclk". The RNG kernel clock
+            must be named "rng_clk".
+          maxItems: 2
+      required:
+        - clock-names
+    else:
+      properties:
+        clocks:
+          maxItems: 1
+
 additionalProperties: false
 
 examples:
   - |
-    #include <dt-bindings/clock/stm32mp1-clks.h>
     rng@...03000 {
       compatible = "st,stm32-rng";
       reg = <0x54003000 0x400>;
-      clocks = <&rcc RNG1_K>;
+      clocks = <&rcc 124>;
     };
 
+  - |
+    rng: rng@...20000 {
+      compatible = "st,stm32mp25-rng";
+      reg = <0x42020000 0x400>;
+      clocks = <&clk_rcbsec>, <&rcc 110>;
+      clock-names = "rng_clk", "rng_hclk";
+      resets = <&rcc 97>;
+      access-controllers = <&rifsc 92>;
+    };
 ...
-- 
2.25.1