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Message-Id: <20200227123648.12785-1-yamada.masahiro@socionext.com>
Date: Thu, 27 Feb 2020 21:36:48 +0900
From: Masahiro Yamada <yamada.masahiro@...ionext.com>
To: devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>
Cc: Frank Rowand <frowand.list@...il.com>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Mark Rutland <mark.rutland@....com>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: arm: Convert UniPhier System Cache to json-schema
Convert the UniPhier System Cache binding to DT schema format.
This is a full-custom outer cache (L2 and L3) used on UniPhier
ARM 32-bit SoCs.
While I was here, I added the interrupts property. This is not
used in Linux, but the hardware has interrupt lines at least.
Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---
.../bindings/arm/socionext/cache-uniphier.txt | 60 -----------
.../socionext,uniphier-system-cache.yaml | 102 ++++++++++++++++++
2 files changed, 102 insertions(+), 60 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/arm/socionext/cache-uniphier.txt
create mode 100644 Documentation/devicetree/bindings/arm/socionext/socionext,uniphier-system-cache.yaml
diff --git a/Documentation/devicetree/bindings/arm/socionext/cache-uniphier.txt b/Documentation/devicetree/bindings/arm/socionext/cache-uniphier.txt
deleted file mode 100644
index d27a646f48a9..000000000000
--- a/Documentation/devicetree/bindings/arm/socionext/cache-uniphier.txt
+++ /dev/null
@@ -1,60 +0,0 @@
-UniPhier outer cache controller
-
-UniPhier SoCs are integrated with a full-custom outer cache controller system.
-All of them have a level 2 cache controller, and some have a level 3 cache
-controller as well.
-
-Required properties:
-- compatible: should be "socionext,uniphier-system-cache"
-- reg: offsets and lengths of the register sets for the device. It should
- contain 3 regions: control register, revision register, operation register,
- in this order.
-- cache-unified: specifies the cache is a unified cache.
-- cache-size: specifies the size in bytes of the cache
-- cache-sets: specifies the number of associativity sets of the cache
-- cache-line-size: specifies the line size in bytes
-- cache-level: specifies the level in the cache hierarchy. The value should
- be 2 for L2 cache, 3 for L3 cache, etc.
-
-Optional properties:
-- next-level-cache: phandle to the next level cache if present. The next level
- cache should be also compatible with "socionext,uniphier-system-cache".
-
-The L2 cache must exist to use the L3 cache; the cache hierarchy must be
-indicated correctly with "next-level-cache" properties.
-
-Example 1 (system with L2):
- l2: l2-cache@...c0000 {
- compatible = "socionext,uniphier-system-cache";
- reg = <0x500c0000 0x2000>, <0x503c0100 0x4>,
- <0x506c0000 0x400>;
- cache-unified;
- cache-size = <0x80000>;
- cache-sets = <256>;
- cache-line-size = <128>;
- cache-level = <2>;
- };
-
-Example 2 (system with L2 and L3):
- l2: l2-cache@...c0000 {
- compatible = "socionext,uniphier-system-cache";
- reg = <0x500c0000 0x2000>, <0x503c0100 0x8>,
- <0x506c0000 0x400>;
- cache-unified;
- cache-size = <0x200000>;
- cache-sets = <512>;
- cache-line-size = <128>;
- cache-level = <2>;
- next-level-cache = <&l3>;
- };
-
- l3: l3-cache@...c8000 {
- compatible = "socionext,uniphier-system-cache";
- reg = <0x500c8000 0x2000>, <0x503c8100 0x8>,
- <0x506c8000 0x400>;
- cache-unified;
- cache-size = <0x400000>;
- cache-sets = <512>;
- cache-line-size = <256>;
- cache-level = <3>;
- };
diff --git a/Documentation/devicetree/bindings/arm/socionext/socionext,uniphier-system-cache.yaml b/Documentation/devicetree/bindings/arm/socionext/socionext,uniphier-system-cache.yaml
new file mode 100644
index 000000000000..2e765bb3e6f6
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/socionext/socionext,uniphier-system-cache.yaml
@@ -0,0 +1,102 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/socionext/socionext,uniphier-system-cache.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: UniPhier outer cache controller
+
+description: |
+ UniPhier ARM 32-bit SoCs are integrated with a full-custom outer cache
+ controller system. All of them have a level 2 cache controller, and some
+ have a level 3 cache controller as well.
+
+maintainers:
+ - Masahiro Yamada <yamada.masahiro@...ionext.com>
+
+properties:
+ compatible:
+ const: socionext,uniphier-system-cache
+
+ reg:
+ description: |
+ should contain 3 regions: control register, revision register,
+ operation register, in this order.
+ minItems: 3
+ maxItems: 3
+
+ interrupts:
+ description: |
+ Interrupts can be used to notify the completion of cache operations.
+ The number of interrupts should match to the number of CPU cores.
+ The specified interrupts correspond to CPU0, CPU1, ... in this order.
+ minItems: 1
+ maxItems: 4
+
+ cache-unified: true
+
+ cache-size: true
+
+ cache-sets: true
+
+ cache-line-size: true
+
+ cache-level:
+ minimum: 2
+ maximum: 3
+
+ next-level-cache: true
+
+allOf:
+ - $ref: /schemas/cache-controller.yaml#
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - cache-unified
+ - cache-size
+ - cache-sets
+ - cache-line-size
+ - cache-level
+
+examples:
+ - |
+ // System with L2.
+ cache-controller@...c0000 {
+ compatible = "socionext,uniphier-system-cache";
+ reg = <0x500c0000 0x2000>, <0x503c0100 0x4>, <0x506c0000 0x400>;
+ interrupts = <0 174 4>, <0 175 4>, <0 190 4>, <0 191 4>;
+ cache-unified;
+ cache-size = <0x140000>;
+ cache-sets = <512>;
+ cache-line-size = <128>;
+ cache-level = <2>;
+ };
+ - |
+ // System with L2 and L3.
+ // L2 should specify the next level cache by 'next-level-cache'.
+ l2: cache-controller@...c0000 {
+ compatible = "socionext,uniphier-system-cache";
+ reg = <0x500c0000 0x2000>, <0x503c0100 0x8>, <0x506c0000 0x400>;
+ interrupts = <0 190 4>, <0 191 4>;
+ cache-unified;
+ cache-size = <0x200000>;
+ cache-sets = <512>;
+ cache-line-size = <128>;
+ cache-level = <2>;
+ next-level-cache = <&l3>;
+ };
+
+ l3: cache-controller@...c8000 {
+ compatible = "socionext,uniphier-system-cache";
+ reg = <0x500c8000 0x2000>, <0x503c8100 0x8>, <0x506c8000 0x400>;
+ interrupts = <0 174 4>, <0 175 4>;
+ cache-unified;
+ cache-size = <0x200000>;
+ cache-sets = <512>;
+ cache-line-size = <256>;
+ cache-level = <3>;
+ };
--
2.17.1
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