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Message-ID: <20250521210712.59742-1-robh@kernel.org>
Date: Wed, 21 May 2025 16:07:11 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Andrew Bresticker <abrestic@...omium.org>
Cc: linux-clk@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: clock: Convert img,pistachio-clk to DT schema
Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
.../bindings/clock/img,pistachio-clk.yaml | 136 ++++++++++++++++++
.../bindings/clock/pistachio-clock.txt | 123 ----------------
2 files changed, 136 insertions(+), 123 deletions(-)
create mode 100644 Documentation/devicetree/bindings/clock/img,pistachio-clk.yaml
delete mode 100644 Documentation/devicetree/bindings/clock/pistachio-clock.txt
diff --git a/Documentation/devicetree/bindings/clock/img,pistachio-clk.yaml b/Documentation/devicetree/bindings/clock/img,pistachio-clk.yaml
new file mode 100644
index 000000000000..e70feee8e894
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/img,pistachio-clk.yaml
@@ -0,0 +1,136 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/img,pistachio-clk.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Imagination Technologies Pistachio SoC clock controllers
+
+maintainers:
+ - Andrew Bresticker <abrestic@...omium.org>
+
+description: |
+ Pistachio has four clock controllers (core clock, peripheral clock, peripheral
+ general control, and top general control) which are instantiated individually
+ from the device-tree.
+
+ Core clock controller:
+
+ The core clock controller generates clocks for the CPU, RPU (WiFi + BT
+ co-processor), audio, and several peripherals.
+
+ Peripheral clock controller:
+
+ The peripheral clock controller generates clocks for the DDR, ROM, and other
+ peripherals. The peripheral system clock ("periph_sys") generated by the core
+ clock controller is the input clock to the peripheral clock controller.
+
+ Peripheral general control:
+
+ The peripheral general control block generates system interface clocks and
+ resets for various peripherals. It also contains miscellaneous peripheral
+ control registers.
+
+ Top-level general control:
+
+ The top-level general control block contains miscellaneous control registers
+ and gates for the external clocks "audio_clk_in" and "enet_clk_in".
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - img,pistachio-clk
+ - img,pistachio-clk-periph
+ - img,pistachio-cr-periph
+ - img,pistachio-cr-top
+
+ reg:
+ maxItems: 1
+
+ '#clock-cells':
+ const: 1
+
+ clocks:
+ minItems: 1
+ maxItems: 3
+
+ clock-names:
+ minItems: 1
+ maxItems: 3
+
+required:
+ - compatible
+ - reg
+ - '#clock-cells'
+ - clocks
+ - clock-names
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: img,pistachio-clk
+ then:
+ properties:
+ clocks:
+ items:
+ - description: External 52Mhz oscillator
+ - description: Alternate audio reference clock
+ - description: Alternate ethernet PHY clock
+
+ clock-names:
+ items:
+ - const: xtal
+ - const: audio_refclk_ext_gate
+ - const: ext_enet_in_gate
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: img,pistachio-clk-periph
+ then:
+ properties:
+ clocks:
+ items:
+ - description: Peripheral system clock
+
+ clock-names:
+ items:
+ - const: periph_sys_core
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: img,pistachio-cr-periph
+ then:
+ properties:
+ clocks:
+ items:
+ - description: System interface clock
+
+ clock-names:
+ items:
+ - const: sys
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: img,pistachio-cr-top
+ then:
+ properties:
+ clocks:
+ items:
+ - description: External audio reference clock
+ - description: External ethernet PHY clock
+
+ clock-names:
+ items:
+ - const: audio_clk_in
+ - const: enet_clk_in
+
+additionalProperties: false
diff --git a/Documentation/devicetree/bindings/clock/pistachio-clock.txt b/Documentation/devicetree/bindings/clock/pistachio-clock.txt
deleted file mode 100644
index 868db499eed2..000000000000
--- a/Documentation/devicetree/bindings/clock/pistachio-clock.txt
+++ /dev/null
@@ -1,123 +0,0 @@
-Imagination Technologies Pistachio SoC clock controllers
-========================================================
-
-Pistachio has four clock controllers (core clock, peripheral clock, peripheral
-general control, and top general control) which are instantiated individually
-from the device-tree.
-
-External clocks:
-----------------
-
-There are three external inputs to the clock controllers which should be
-defined with the following clock-output-names:
-- "xtal": External 52Mhz oscillator (required)
-- "audio_clk_in": Alternate audio reference clock (optional)
-- "enet_clk_in": Alternate ethernet PHY clock (optional)
-
-Core clock controller:
-----------------------
-
-The core clock controller generates clocks for the CPU, RPU (WiFi + BT
-co-processor), audio, and several peripherals.
-
-Required properties:
-- compatible: Must be "img,pistachio-clk".
-- reg: Must contain the base address and length of the core clock controller.
-- #clock-cells: Must be 1. The single cell is the clock identifier.
- See dt-bindings/clock/pistachio-clk.h for the list of valid identifiers.
-- clocks: Must contain an entry for each clock in clock-names.
-- clock-names: Must include "xtal" (see "External clocks") and
- "audio_clk_in_gate", "enet_clk_in_gate" which are generated by the
- top-level general control.
-
-Example:
- clk_core: clock-controller@...44000 {
- compatible = "img,pistachio-clk";
- reg = <0x18144000 0x800>;
- clocks = <&xtal>, <&cr_top EXT_CLK_AUDIO_IN>,
- <&cr_top EXT_CLK_ENET_IN>;
- clock-names = "xtal", "audio_clk_in_gate", "enet_clk_in_gate";
-
- #clock-cells = <1>;
- };
-
-Peripheral clock controller:
-----------------------------
-
-The peripheral clock controller generates clocks for the DDR, ROM, and other
-peripherals. The peripheral system clock ("periph_sys") generated by the core
-clock controller is the input clock to the peripheral clock controller.
-
-Required properties:
-- compatible: Must be "img,pistachio-periph-clk".
-- reg: Must contain the base address and length of the peripheral clock
- controller.
-- #clock-cells: Must be 1. The single cell is the clock identifier.
- See dt-bindings/clock/pistachio-clk.h for the list of valid identifiers.
-- clocks: Must contain an entry for each clock in clock-names.
-- clock-names: Must include "periph_sys", the peripheral system clock generated
- by the core clock controller.
-
-Example:
- clk_periph: clock-controller@...44800 {
- compatible = "img,pistachio-clk-periph";
- reg = <0x18144800 0x800>;
- clocks = <&clk_core CLK_PERIPH_SYS>;
- clock-names = "periph_sys";
-
- #clock-cells = <1>;
- };
-
-Peripheral general control:
----------------------------
-
-The peripheral general control block generates system interface clocks and
-resets for various peripherals. It also contains miscellaneous peripheral
-control registers. The system clock ("sys") generated by the peripheral clock
-controller is the input clock to the system clock controller.
-
-Required properties:
-- compatible: Must include "img,pistachio-periph-cr" and "syscon".
-- reg: Must contain the base address and length of the peripheral general
- control registers.
-- #clock-cells: Must be 1. The single cell is the clock identifier.
- See dt-bindings/clock/pistachio-clk.h for the list of valid identifiers.
-- clocks: Must contain an entry for each clock in clock-names.
-- clock-names: Must include "sys", the system clock generated by the peripheral
- clock controller.
-
-Example:
- cr_periph: syscon@...44800 {
- compatible = "img,pistachio-cr-periph", "syscon";
- reg = <0x18148000 0x1000>;
- clocks = <&clock_periph PERIPH_CLK_PERIPH_SYS>;
- clock-names = "sys";
-
- #clock-cells = <1>;
- };
-
-Top-level general control:
---------------------------
-
-The top-level general control block contains miscellaneous control registers and
-gates for the external clocks "audio_clk_in" and "enet_clk_in".
-
-Required properties:
-- compatible: Must include "img,pistachio-cr-top" and "syscon".
-- reg: Must contain the base address and length of the top-level
- control registers.
-- clocks: Must contain an entry for each clock in clock-names.
-- clock-names: Two optional clocks, "audio_clk_in" and "enet_clk_in" (see
- "External clocks").
-- #clock-cells: Must be 1. The single cell is the clock identifier.
- See dt-bindings/clock/pistachio-clk.h for the list of valid identifiers.
-
-Example:
- cr_top: syscon@...44800 {
- compatible = "img,pistachio-cr-top", "syscon";
- reg = <0x18149000 0x200>;
- clocks = <&audio_refclk>, <&ext_enet_in>;
- clock-names = "audio_clk_in", "enet_clk_in";
-
- #clock-cells = <1>;
- };
--
2.47.2
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