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Message-Id: <20220402143636.15222-7-jbx6244@gmail.com>
Date: Sat, 2 Apr 2022 16:36:26 +0200
From: Johan Jonker <jbx6244@...il.com>
To: heiko@...ech.de, zhangqing@...k-chips.com
Cc: robh+dt@...nel.org, krzk+dt@...nel.org, mturquette@...libre.com,
sboyd@...nel.org, linux-clk@...r.kernel.org,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 06/16] dt-bindings: clock: convert rockchip,rk3308-cru.txt to YAML
Convert rockchip,rk3308-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@...il.com>
---
Changed V4:
add more clocks
add clocks to example
add clocks requirement
---
.../bindings/clock/rockchip,rk3308-cru.txt | 60 -------------
.../bindings/clock/rockchip,rk3308-cru.yaml | 86 +++++++++++++++++++
2 files changed, 86 insertions(+), 60 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3308-cru.txt
create mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3308-cru.yaml
diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3308-cru.txt b/Documentation/devicetree/bindings/clock/rockchip,rk3308-cru.txt
deleted file mode 100644
index 9b151c5b0..000000000
--- a/Documentation/devicetree/bindings/clock/rockchip,rk3308-cru.txt
+++ /dev/null
@@ -1,60 +0,0 @@
-* Rockchip RK3308 Clock and Reset Unit
-
-The RK3308 clock controller generates and supplies clock to various
-controllers within the SoC and also implements a reset controller for SoC
-peripherals.
-
-Required Properties:
-
-- compatible: CRU should be "rockchip,rk3308-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/rk3308-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,
- - "mclk_i2s0_8ch_in", "mclk_i2s1_8ch_in", "mclk_i2s2_8ch_in",
- "mclk_i2s3_8ch_in", "mclk_i2s0_2ch_in",
- "mclk_i2s1_2ch_in" - external I2S or SPDIF clock - optional,
- - "mac_clkin" - external MAC clock - optional
-
-Example: Clock controller node:
-
- cru: clock-controller@...00000 {
- compatible = "rockchip,rk3308-cru";
- reg = <0x0 0xff500000 0x0 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@...a0000 {
- compatible = "rockchip,rk3308-uart", "snps,dw-apb-uart";
- reg = <0x0 0xff0a0000 0x0 0x100>;
- interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&cru SCLK_UART0>, <&cru PCLK_UART0>;
- clock-names = "baudclk", "apb_pclk";
- reg-shift = <2>;
- reg-io-width = <4>;
- status = "disabled";
- };
diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3308-cru.yaml b/Documentation/devicetree/bindings/clock/rockchip,rk3308-cru.yaml
new file mode 100644
index 000000000..01f2d1690
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/rockchip,rk3308-cru.yaml
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/rockchip,rk3308-cru.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip RK3308 Clock and Reset Unit (CRU)
+
+maintainers:
+ - Elaine Zhang <zhangqing@...k-chips.com>
+ - Heiko Stuebner <heiko@...ech.de>
+
+description: |
+ The RK3308 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/rk3308-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,rk3308-cru
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ minItems: 1
+ maxItems: 9
+
+ clock-names:
+ minItems: 1
+ maxItems: 9
+ items:
+ enum:
+ - xin24m
+ - xin32k
+ - mac_clkin
+ - mclk_i2s0_2ch_in
+ - mclk_i2s1_2ch_in
+ - mclk_i2s0_8ch_in
+ - mclk_i2s1_8ch_in
+ - mclk_i2s2_8ch_in
+ - mclk_i2s3_8ch_in
+
+ 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@...00000 {
+ compatible = "rockchip,rk3308-cru";
+ reg = <0xff500000 0x1000>;
+ clocks = <&xin24m>;
+ clock-names = "xin24m";
+ rockchip,grf = <&grf>;
+ #clock-cells = <1>;
+ #reset-cells = <1>;
+ };
--
2.20.1
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