linux-kernel - [PATCH v3 1/2] dt-bindings: rng: bcm2835: document reset support

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Date:   Tue, 23 Feb 2021 18:00:05 +0100
From:   Álvaro Fernández Rojas 
        <noltari@...il.com>
To:     Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Rob Herring <robh+dt@...nel.org>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mark Brown <broonie@...nel.org>,
        Álvaro Fernández Rojas 
        <noltari@...il.com>, Guenter Roeck <linux@...ck-us.net>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Nícolas F. R. A. Prado 
        <nfraprado@...tonmail.com>,
        Rikard Falkeborn <rikard.falkeborn@...il.com>,
        Stefan Wahren <stefan.wahren@...e.com>,
        linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 1/2] dt-bindings: rng: bcm2835: document reset support

Some devices may need to perform a reset before using the RNG, such as the
BCM6368.

Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
---
 v3: make resets required if brcm,bcm6368-rng.
 v2: document reset support.

 .../devicetree/bindings/rng/brcm,bcm2835.yaml   | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/rng/brcm,bcm2835.yaml b/Documentation/devicetree/bindings/rng/brcm,bcm2835.yaml
index c147900f9041..11c23e1f6988 100644
--- a/Documentation/devicetree/bindings/rng/brcm,bcm2835.yaml
+++ b/Documentation/devicetree/bindings/rng/brcm,bcm2835.yaml
@@ -37,6 +37,21 @@ required:
 
 additionalProperties: false
 
+if:
+  properties:
+    compatible:
+      enum:
+        - brcm,bcm6368-rng
+then:
+  properties:
+    resets:
+      maxItems: 1
+  required:
+    - resets
+else:
+  properties:
+    resets: false
+
 examples:
   - |
     rng@...04000 {
@@ -58,4 +73,6 @@ examples:
 
         clocks = <&periph_clk 18>;
         clock-names = "ipsec";
+
+        resets = <&periph_rst 4>;
     };
-- 
2.20.1