linux-kernel - [PATCH 2/3] dt-bindings: clock: samsung: add bindings for Exynos external clock

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Message-Id: <20210809120544.56596-2-krzysztof.kozlowski@canonical.com>
Date:   Mon,  9 Aug 2021 14:05:43 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     Sam Protsenko <semen.protsenko@...aro.org>
Subject: [PATCH 2/3] dt-bindings: clock: samsung: add bindings for Exynos external clock

Document the bindings for Samsung Exynos external to SoC
(oscclk/XXTI/XusbXTI) clock provided on boards.  The bindings are
already implemented in most of the Exynos clock drivers and DTS files.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
---
 .../clock/samsung,exynos-ext-clock.yaml       | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/samsung,exynos-ext-clock.yaml

diff --git a/Documentation/devicetree/bindings/clock/samsung,exynos-ext-clock.yaml b/Documentation/devicetree/bindings/clock/samsung,exynos-ext-clock.yaml
new file mode 100644
index 000000000000..64d027dbe3b2
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/samsung,exynos-ext-clock.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/samsung,exynos-ext-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung SoC external/osc/XXTI/XusbXTI clock
+
+maintainers:
+  - Chanwoo Choi <cw00.choi@...sung.com>
+  - Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
+  - Sylwester Nawrocki <s.nawrocki@...sung.com>
+  - Tomasz Figa <tomasz.figa@...il.com>
+
+description: |
+  Samsung SoCs require an external clock supplied through XXTI or XusbXTI pins.
+
+properties:
+  compatible:
+    enum:
+      - samsung,clock-xxti
+      - samsung,clock-xusbxti
+      - samsung,exynos5420-oscclk
+
+  "#clock-cells":
+    const: 0
+
+  clock-frequency: true
+
+  clock-output-names:
+    maxItems: 1
+
+required:
+  - compatible
+  - clock-frequency
+
+additionalProperties: false
+
+examples:
+  - |
+    fixed-rate-clocks {
+        clock {
+            compatible = "samsung,clock-xxti";
+            clock-frequency = <24000000>;
+        };
+    };
-- 
2.30.2