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From:   Johan Jonker <jbx6244@gmail.com>
To:     heiko@sntech.de, zhangqing@rock-chips.com
Cc:     robh+dt@kernel.org, krzk+dt@kernel.org, mturquette@baylibre.com,
        sboyd@kernel.org, linux-clk@vger.kernel.org,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 03/16] dt-bindings: clock: convert rockchip,rk3188-cru.txt to YAML
Date:   Sat,  2 Apr 2022 16:36:23 +0200
Message-Id: <20220402143636.15222-4-jbx6244@gmail.com>
In-Reply-To: <20220402143636.15222-1-jbx6244@gmail.com>
References: <20220402143636.15222-1-jbx6244@gmail.com>
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Precedence: bulk

Convert rockchip,rk3188-cru.txt to YAML.

Changes against original bindings:
  Add clocks and clock-names because the device has to have
  at least one input clock.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
---

Changed V4:
  add more clocks
  add clocks to example
  add clocks requirement

Changed V3:
  add Rockchip maintainer on her request
  fix yamllint line too long

Changed V2:
  change clocks maxItems
  add clock-names
  use clock-controller node name
  remove assigned-xxx
---
 .../bindings/clock/rockchip,rk3188-cru.txt    | 61 -------------
 .../bindings/clock/rockchip,rk3188-cru.yaml   | 86 +++++++++++++++++++
 2 files changed, 86 insertions(+), 61 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.txt
 create mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.yaml

diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.txt b/Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.txt
deleted file mode 100644
index 7f368530a..000000000
--- a/Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.txt
+++ /dev/null
@@ -1,61 +0,0 @@
-* Rockchip RK3188/RK3066 Clock and Reset Unit
-
-The RK3188/RK3066 clock controller generates and supplies clock to various
-controllers within the SoC and also implements a reset controller for SoC
-peripherals.
-
-Required Properties:
-
-- compatible: should be "rockchip,rk3188-cru", "rockchip,rk3188a-cru" or
-			"rockchip,rk3066a-cru"
-- reg: physical base address of the controller and length of memory mapped
-  region.
-- #clock-cells: should be 1.
-- #reset-cells: should be 1.
-
-Optional Properties:
-
-- rockchip,grf: phandle to the syscon managing the "general register files"
-  If missing pll rates are not changeable, due to the missing pll lock status.
-
-Each clock is assigned an identifier and client nodes can use this identifier
-to specify the clock which they consume. All available clocks are defined as
-preprocessor macros in the dt-bindings/clock/rk3188-cru.h and
-dt-bindings/clock/rk3066-cru.h headers and can be used in device tree sources.
-Similar macros exist for the reset sources in these files.
-
-External clocks:
-
-There are several clocks that are generated outside the SoC. It is expected
-that they are defined using standard clock bindings with following
-clock-output-names:
- - "xin24m" - crystal input - required,
- - "xin32k" - rtc clock - optional,
- - "xin27m" - 27mhz crystal input on rk3066 - optional,
- - "ext_hsadc" - external HSADC clock - optional,
- - "ext_cif0" - external camera clock - optional,
- - "ext_rmii" - external RMII clock - optional,
- - "ext_jtag" - externalJTAG clock - optional
-
-Example: Clock controller node:
-
-	cru: cru@20000000 {
-		compatible = "rockchip,rk3188-cru";
-		reg = <0x20000000 0x1000>;
-		rockchip,grf = <&grf>;
-
-		#clock-cells = <1>;
-		#reset-cells = <1>;
-	};
-
-Example: UART controller node that consumes the clock generated by the clock
-  controller:
-
-	uart0: serial@10124000 {
-		compatible = "snps,dw-apb-uart";
-		reg = <0x10124000 0x400>;
-		interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
-		reg-shift = <2>;
-		reg-io-width = <1>;
-		clocks = <&cru SCLK_UART0>;
-	};
diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.yaml b/Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.yaml
new file mode 100644
index 000000000..ff849c729
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.yaml
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/rockchip,rk3188-cru.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip RK3188/RK3066 Clock and Reset Unit (CRU)
+
+maintainers:
+  - Elaine Zhang <zhangqing@rock-chips.com>
+  - Heiko Stuebner <heiko@sntech.de>
+
+description: |
+  The RK3188/RK3066 clock controller generates and supplies clocks to various
+  controllers within the SoC and also implements a reset controller for SoC
+  peripherals.
+  Each clock is assigned an identifier and client nodes can use this identifier
+  to specify the clock which they consume. All available clocks are defined as
+  preprocessor macros in the dt-bindings/clock/rk3188-cru.h and
+  dt-bindings/clock/rk3066-cru.h headers and can be used in device tree sources.
+  Similar macros exist for the reset sources in these files.
+  There are several clocks that are generated outside the SoC. It is expected
+  that they are defined using standard clock bindings with the
+  clock-output-names defined in this schema.
+
+properties:
+  compatible:
+    enum:
+      - rockchip,rk3066a-cru
+      - rockchip,rk3188-cru
+      - rockchip,rk3188a-cru
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    maxItems: 7
+
+  clock-names:
+    minItems: 1
+    maxItems: 7
+    items:
+      enum:
+        - xin24m
+        - xin27m
+        - xin32k
+        - ext_cif0
+        - ext_hsadc
+        - ext_jtag
+        - ext_rmii
+
+  rockchip,grf:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to the syscon managing the "general register files" (GRF),
+      if missing pll rates are not changeable, due to the missing pll
+      lock status.
+
+  "#clock-cells":
+    const: 1
+
+  "#reset-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - "#clock-cells"
+  - "#reset-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    cru: clock-controller@20000000 {
+      compatible = "rockchip,rk3188-cru";
+      reg = <0x20000000 0x1000>;
+      clocks = <&xin24m>;
+      clock-names = "xin24m";
+      rockchip,grf = <&grf>;
+      #clock-cells = <1>;
+      #reset-cells = <1>;
+    };
-- 
2.20.1