linux-kernel - [PATCH v6 2/3] dt-bindings: rng: bcm2835: document reset support

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Date:   Fri,  5 Mar 2021 08:01:31 +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>,
        Álvaro Fernández Rojas 
        <noltari@...il.com>, Lee Jones <lee.jones@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        Rikard Falkeborn <rikard.falkeborn@...il.com>,
        Tian Tao <tiantao6@...ilicon.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 v6 2/3] dt-bindings: rng: bcm2835: document reset support

brcm,bcm6368-rng controllers require resetting the IPSEC clock in order to get
a functional RNG.

Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
---
 v6: fix dt-bindings warnings.
 v5: no changes.
 v4: pass dt_binding_check.
 v3: make resets required if brcm,bcm6368-rng.
 v2: document reset support.

 .../devicetree/bindings/rng/brcm,bcm2835.yaml         | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/rng/brcm,bcm2835.yaml b/Documentation/devicetree/bindings/rng/brcm,bcm2835.yaml
index 5174492e22f3..6da674666d45 100644
--- a/Documentation/devicetree/bindings/rng/brcm,bcm2835.yaml
+++ b/Documentation/devicetree/bindings/rng/brcm,bcm2835.yaml
@@ -28,6 +28,12 @@ properties:
   clock-names:
     const: ipsec
 
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: ipsec
+
   interrupts:
     maxItems: 1
 
@@ -44,6 +50,8 @@ then:
   required:
     - clocks
     - clock-names
+    - resets
+    - reset-names
 
 additionalProperties: false
 
@@ -68,4 +76,7 @@ examples:
 
         clocks = <&periph_clk 18>;
         clock-names = "ipsec";
+
+        resets = <&periph_rst 4>;
+        reset-names = "ipsec";
     };
-- 
2.20.1