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From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To:     Andi Shyti <andi.shyti@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Alim Akhtar <alim.akhtar@samsung.com>,
        Thierry Reding <thierry.reding@gmail.com>,
        =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= 
        <u.kleine-koenig@pengutronix.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jirislaby@kernel.org>,
        Wim Van Sebroeck <wim@linux-watchdog.org>,
        Guenter Roeck <linux@roeck-us.net>, linux-fsd@tesla.com,
        linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-pwm@vger.kernel.org, linux-serial@vger.kernel.org,
        linux-watchdog@vger.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Subject: [PATCH 5/6] dt-bindings: watchdog: samsung: add specific compatible for Tesla FSD
Date:   Tue,  5 Dec 2023 10:22:28 +0100
Message-Id: <20231205092229.19135-6-krzysztof.kozlowski@linaro.org>
In-Reply-To: <20231205092229.19135-1-krzysztof.kozlowski@linaro.org>
References: <20231205092229.19135-1-krzysztof.kozlowski@linaro.org>
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Tesla FSD is a derivative of Samsung Exynos SoC, thus just like the
others it reuses several devices from older designs.  Historically we
kept the old (block's) compatible only.  This works fine and there is no
bug here, however guidelines expressed in
Documentation/devicetree/bindings/writing-bindings.rst state that:
1. Compatibles should be specific.
2. We should add new compatibles in case of bugs or features.

Add Tesla FSD compatible specific to be used with an existing fallback.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

---

I propose to take the patch through Samsung SoC (me). See cover letter
for explanation.
---
 .../bindings/watchdog/samsung-wdt.yaml        | 21 ++++++++++++-------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml b/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml
index 8fb6656ba0c2..ea2d206b05ab 100644
--- a/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml
@@ -16,14 +16,19 @@ description: |+
 
 properties:
   compatible:
-    enum:
-      - samsung,s3c2410-wdt                   # for S3C2410
-      - samsung,s3c6410-wdt                   # for S3C6410, S5PV210 and Exynos4
-      - samsung,exynos5250-wdt                # for Exynos5250
-      - samsung,exynos5420-wdt                # for Exynos5420
-      - samsung,exynos7-wdt                   # for Exynos7
-      - samsung,exynos850-wdt                 # for Exynos850
-      - samsung,exynosautov9-wdt              # for Exynosautov9
+    oneOf:
+      - enum:
+          - samsung,s3c2410-wdt                   # for S3C2410
+          - samsung,s3c6410-wdt                   # for S3C6410, S5PV210 and Exynos4
+          - samsung,exynos5250-wdt                # for Exynos5250
+          - samsung,exynos5420-wdt                # for Exynos5420
+          - samsung,exynos7-wdt                   # for Exynos7
+          - samsung,exynos850-wdt                 # for Exynos850
+          - samsung,exynosautov9-wdt              # for Exynosautov9
+      - items:
+          - enum:
+              - tesla,fsd-wdt
+          - const: samsung,exynos7-wdt
 
   reg:
     maxItems: 1
-- 
2.34.1