linux-kernel - [PATCH 1/5] dt-bindings: rtc: Rework compatible strings and add #clock-cells

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Date:   Mon, 18 Apr 2022 19:49:29 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     list@...ndingux.net, linux-rtc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Subject: [PATCH 1/5] dt-bindings: rtc: Rework compatible strings and add #clock-cells

The RTC in the JZ4770 is compatible with the JZ4760, but has an extra
register that permits to configure the behaviour of the CLK32K pin. The
same goes for the RTC in the JZ4780.

Therefore, the ingenic,jz4770-rtc and ingenic,jz4780-rtc strings do not
fall back anymore to ingenic,jz4760-rtc. The ingenic,jz4780-rtc string
now falls back to the ingenic,jz4770-rtc string.

Additionally, since the RTCs in the JZ4770 and JZ4780 support outputting
the input oscillator's clock to the CLK32K pin, the RTC node is now also
a clock provider on these SoCs, so a #clock-cells property is added.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
---
 Documentation/devicetree/bindings/rtc/ingenic,rtc.yaml | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/ingenic,rtc.yaml b/Documentation/devicetree/bindings/rtc/ingenic,rtc.yaml
index b235b2441997..57393c3ac724 100644
--- a/Documentation/devicetree/bindings/rtc/ingenic,rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/ingenic,rtc.yaml
@@ -18,14 +18,14 @@ properties:
       - enum:
           - ingenic,jz4740-rtc
           - ingenic,jz4760-rtc
+          - ingenic,jz4770-rtc
       - items:
           - const: ingenic,jz4725b-rtc
           - const: ingenic,jz4740-rtc
       - items:
           - enum:
-              - ingenic,jz4770-rtc
               - ingenic,jz4780-rtc
-          - const: ingenic,jz4760-rtc
+          - const: ingenic,jz4770-rtc
 
   reg:
     maxItems: 1
@@ -39,6 +39,9 @@ properties:
   clock-names:
     const: rtc
 
+  "#clock-cells":
+    const: 0
+
   system-power-controller:
     description: |
       Indicates that the RTC is responsible for powering OFF
-- 
2.35.1