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Date: Wed, 8 Apr 2020 11:14:51 +0200
From: Geert Uytterhoeven <geert+renesas@...der.be>
To: Rob Herring <robh+dt@...nel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-renesas-soc@...r.kernel.org,
Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH] dt-bindings: timer: renesas: tmu: Convert to json-schema
Convert the Renesas R-Mobile/R-Car Timer Unit (TMU) Device Tree binding
documentation to json-schema.
Document missing properties.
Update the example to match reality.
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
.../devicetree/bindings/timer/renesas,tmu.txt | 49 ----------
.../bindings/timer/renesas,tmu.yaml | 97 +++++++++++++++++++
2 files changed, 97 insertions(+), 49 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/timer/renesas,tmu.txt
create mode 100644 Documentation/devicetree/bindings/timer/renesas,tmu.yaml
diff --git a/Documentation/devicetree/bindings/timer/renesas,tmu.txt b/Documentation/devicetree/bindings/timer/renesas,tmu.txt
deleted file mode 100644
index 29159f4e65abece9..0000000000000000
--- a/Documentation/devicetree/bindings/timer/renesas,tmu.txt
+++ /dev/null
@@ -1,49 +0,0 @@
-* Renesas R-Mobile/R-Car Timer Unit (TMU)
-
-The TMU is a 32-bit timer/counter with configurable clock inputs and
-programmable compare match.
-
-Channels share hardware resources but their counter and compare match value
-are independent. The TMU hardware supports up to three channels.
-
-Required Properties:
-
- - compatible: must contain one or more of the following:
- - "renesas,tmu-r8a7740" for the r8a7740 TMU
- - "renesas,tmu-r8a774a1" for the r8a774A1 TMU
- - "renesas,tmu-r8a774b1" for the r8a774B1 TMU
- - "renesas,tmu-r8a774c0" for the r8a774C0 TMU
- - "renesas,tmu-r8a7778" for the r8a7778 TMU
- - "renesas,tmu-r8a7779" for the r8a7779 TMU
- - "renesas,tmu-r8a77970" for the r8a77970 TMU
- - "renesas,tmu-r8a77980" for the r8a77980 TMU
- - "renesas,tmu" for any TMU.
- This is a fallback for the above renesas,tmu-* entries
-
- - reg: base address and length of the registers block for the timer module.
-
- - interrupts: interrupt-specifier for the timer, one per channel.
-
- - clocks: a list of phandle + clock-specifier pairs, one for each entry
- in clock-names.
- - clock-names: must contain "fck" for the functional clock.
-
-Optional Properties:
-
- - #renesas,channels: number of channels implemented by the timer, must be 2
- or 3 (if not specified the value defaults to 3).
-
-
-Example: R8A7779 (R-Car H1) TMU0 node
-
- tmu0: timer@...80000 {
- compatible = "renesas,tmu-r8a7779", "renesas,tmu";
- reg = <0xffd80000 0x30>;
- interrupts = <0 32 IRQ_TYPE_LEVEL_HIGH>,
- <0 33 IRQ_TYPE_LEVEL_HIGH>,
- <0 34 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&mstp0_clks R8A7779_CLK_TMU0>;
- clock-names = "fck";
-
- #renesas,channels = <3>;
- };
diff --git a/Documentation/devicetree/bindings/timer/renesas,tmu.yaml b/Documentation/devicetree/bindings/timer/renesas,tmu.yaml
new file mode 100644
index 0000000000000000..3cae4298feb43db3
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/renesas,tmu.yaml
@@ -0,0 +1,97 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/renesas,tmu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Mobile/R-Car Timer Unit (TMU)
+
+maintainers:
+ - Geert Uytterhoeven <geert+renesas@...der.be>
+ - Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
+
+description:
+ The TMU is a 32-bit timer/counter with configurable clock inputs and
+ programmable compare match.
+
+ Channels share hardware resources but their counter and compare match value
+ are independent. The TMU hardware supports up to three channels.
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - renesas,tmu-r8a7740 # R-Mobile A1
+ - renesas,tmu-r8a774a1 # RZ/G2M
+ - renesas,tmu-r8a774b1 # RZ/G2N
+ - renesas,tmu-r8a774c0 # RZ/G2E
+ - renesas,tmu-r8a7778 # R-Car M1A
+ - renesas,tmu-r8a7779 # R-Car H1
+ - renesas,tmu-r8a77970 # R-Car V3M
+ - renesas,tmu-r8a77980 # R-Car V3H
+ - const: renesas,tmu
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ minItems: 2
+ maxItems: 3
+
+ clocks:
+ maxItems: 1
+
+ clock-names:
+ const: fck
+
+ power-domains:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ '#renesas,channels':
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+ - enum: [ 2, 3 ]
+ - default: 3
+ description:
+ Number of channels implemented by the timer.
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - clock-names
+ - power-domains
+
+if:
+ not:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - renesas,tmu-r8a7740
+ - renesas,tmu-r8a7778
+ - renesas,tmu-r8a7779
+then:
+ required:
+ - resets
+
+examples:
+ - |
+ #include <dt-bindings/clock/r8a7779-clock.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/power/r8a7779-sysc.h>
+ tmu0: timer@...80000 {
+ compatible = "renesas,tmu-r8a7779", "renesas,tmu";
+ reg = <0xffd80000 0x30>;
+ interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&mstp0_clks R8A7779_CLK_TMU0>;
+ clock-names = "fck";
+ power-domains = <&sysc R8A7779_PD_ALWAYS_ON>;
+ #renesas,channels = <3>;
+ };
--
2.17.1
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