linux-kernel - [PATCH v10 2/6] dt: bindings: add mt7621-sysc device tree binding documentation

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Date:   Sun,  7 Mar 2021 08:04:22 +0100
From:   Sergio Paracuellos <sergio.paracuellos@...il.com>
To:     sboyd@...nel.org
Cc:     robh+dt@...nel.org, john@...ozen.org, tsbogend@...ha.franken.de,
        gregkh@...uxfoundation.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-mips@...r.kernel.org,
        devel@...verdev.osuosl.org, neil@...wn.name,
        linux-kernel@...r.kernel.org
Subject: [PATCH v10 2/6] dt: bindings: add mt7621-sysc device tree binding documentation

Adds device tree binding documentation for clocks in the
MT7621 SOC.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@...il.com>
---
 .../bindings/clock/mediatek,mt7621-sysc.yaml  | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/mediatek,mt7621-sysc.yaml

diff --git a/Documentation/devicetree/bindings/clock/mediatek,mt7621-sysc.yaml b/Documentation/devicetree/bindings/clock/mediatek,mt7621-sysc.yaml
new file mode 100644
index 000000000000..ef2d71b23ba0
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/mediatek,mt7621-sysc.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/mediatek,mt7621-sysc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MT7621 Clock Device Tree Bindings
+
+maintainers:
+  - Sergio Paracuellos <sergio.paracuellos@...il.com>
+
+description: |
+  The MT7621 has a PLL controller from where the cpu clock is provided
+  as well as derived clocks for the bus and the peripherals. It also
+  can gate SoC device clocks.
+
+  Each clock is assigned an identifier and client nodes use this identifier
+  to specify the clock which they consume.
+
+  All these identifiers could be found in:
+  [1]: <include/dt-bindings/clock/mt7621-clk.h>.
+
+  The clocks are provided inside a system controller node.
+
+properties:
+  compatible:
+    items:
+      - const: mediatek,mt7621-sysc
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+  "#clock-cells":
+    description:
+      The first cell indicates the clock number, see [1] for available
+      clocks.
+    const: 1
+
+  ralink,memctl:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle of syscon used to control memory registers
+
+  clock-output-names:
+    maxItems: 8
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+  - ralink,memctl
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt7621-clk.h>
+
+    sysc: sysc@0 {
+      compatible = "mediatek,mt7621-sysc", "syscon";
+      reg = <0x0 0x100>;
+      #clock-cells = <1>;
+      ralink,memctl = <&memc>;
+      clock-output-names = "xtal", "cpu", "bus",
+                           "50m", "125m", "150m",
+                           "250m", "270m";
+    };
-- 
2.25.1