linux-kernel - [PATCH v3 7/8] dt-bindings: mfd: Add img,boston-platform-regs

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Message-Id: <20240618-boston-syscon-v3-7-c47c06647a26@flygoat.com>
Date: Tue, 18 Jun 2024 16:11:07 +0100
From: Jiaxun Yang <jiaxun.yang@...goat.com>
To: Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Paul Burton <paulburton@...nel.org>, 
 Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-mips@...r.kernel.org, Jiaxun Yang <jiaxun.yang@...goat.com>
Subject: [PATCH v3 7/8] dt-bindings: mfd: Add img,boston-platform-regs

This compatible has been used in arch/mips/boot/dts/img/boston.dts
for a while but never documented properly.

Write a new binding for this device.
This also covers old img,boston-clock binding so remove that binding.

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
v3: Rename clock and reboot node
---
 .../devicetree/bindings/clock/img,boston-clock.txt | 31 ---------
 .../bindings/mfd/img,boston-platform-regs.yaml     | 74 ++++++++++++++++++++++
 2 files changed, 74 insertions(+), 31 deletions(-)

diff --git a/Documentation/devicetree/bindings/clock/img,boston-clock.txt b/Documentation/devicetree/bindings/clock/img,boston-clock.txt
deleted file mode 100644
index 7bc5e9ffb624..000000000000
--- a/Documentation/devicetree/bindings/clock/img,boston-clock.txt
+++ /dev/null
@@ -1,31 +0,0 @@
-Binding for Imagination Technologies MIPS Boston clock sources.
-
-This binding uses the common clock binding[1].
-
-[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
-
-The device node must be a child node of the syscon node corresponding to the
-Boston system's platform registers.
-
-Required properties:
-- compatible : Should be "img,boston-clock".
-- #clock-cells : Should be set to 1.
-  Values available for clock consumers can be found in the header file:
-    <dt-bindings/clock/boston-clock.h>
-
-Example:
-
-	system-controller@...fd000 {
-		compatible = "img,boston-platform-regs", "syscon";
-		reg = <0x17ffd000 0x1000>;
-
-		clk_boston: clock {
-			compatible = "img,boston-clock";
-			#clock-cells = <1>;
-		};
-	};
-
-	uart0: uart@...fe000 {
-		/* ... */
-		clocks = <&clk_boston BOSTON_CLK_SYS>;
-	};
diff --git a/Documentation/devicetree/bindings/mfd/img,boston-platform-regs.yaml b/Documentation/devicetree/bindings/mfd/img,boston-platform-regs.yaml
new file mode 100644
index 000000000000..79cae87c6758
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/img,boston-platform-regs.yaml
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/img,boston-platform-regs.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Imagination Technologies Boston Platform Registers
+
+maintainers:
+  - Jiaxun Yang <jiaxun.yang@...goat.com>
+
+properties:
+  compatible:
+    items:
+      - const: img,boston-platform-regs
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  clock-controller:
+    type: object
+
+    description: Boston Clock Controller Device Node
+      The clock consumer should specify the desired clock by having the clock
+      ID in its "clocks" phandle cell.
+      See include/dt-bindings/clock/boston-clock.h for the full list of boston
+      clock IDs.
+
+    properties:
+      "#clock-cells":
+        const: 1
+
+      compatible:
+        const: img,boston-clock
+
+    required:
+      - "#clock-cells"
+      - compatible
+
+    additionalProperties: false
+
+  reboot:
+    $ref: /schemas/power/reset/syscon-reboot.yaml#
+
+required:
+  - compatible
+  - reg
+  - clock-controller
+  - reboot
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/boston-clock.h>
+
+    plat_regs: system-controller@...fd000 {
+      compatible = "img,boston-platform-regs", "syscon", "simple-mfd";
+      reg = <0x17ffd000 0x1000>;
+
+      clk_boston: clock-controller {
+        compatible = "img,boston-clock";
+        #clock-cells = <1>;
+      };
+
+      reboot: reboot {
+        compatible = "syscon-reboot";
+        regmap = <&plat_regs>;
+        offset = <0x10>;
+        mask = <0x10>;
+      };
+    };

-- 
2.43.0