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Fri, 1 Nov 2019 10:38:55 -0400 (EDT) From: Maxime Ripard To: Mark Rutland , Rob Herring , Frank Rowand Subject: [PATCH] dt-bindings: Add syscon YAML description Date: Fri, 1 Nov 2019 15:10:34 +0100 Message-Id: <20191101141034.259906-1-maxime@cerno.tech> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191101_073901_487810_A83D1F85 X-CRM114-Status: GOOD ( 12.95 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [66.111.4.230 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Maxime Ripard , Chen-Yu Tsai , Maxime Ripard , lee.jones@linaro.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The syscon binding is a pretty loose one, with everyone having a bunch of vendor specific compatibles. In order to start the effort to describe them using YAML, let's create a binding that tolerates additional, not listed, compatibles. Signed-off-by: Maxime Ripard --- .../devicetree/bindings/mfd/syscon.txt | 32 -------- .../bindings/misc/allwinner,syscon.txt | 20 ----- .../devicetree/bindings/misc/syscon.yaml | 74 +++++++++++++++++++ 3 files changed, 74 insertions(+), 52 deletions(-) delete mode 100644 Documentation/devicetree/bindings/mfd/syscon.txt delete mode 100644 Documentation/devicetree/bindings/misc/allwinner,syscon.txt create mode 100644 Documentation/devicetree/bindings/misc/syscon.yaml diff --git a/Documentation/devicetree/bindings/mfd/syscon.txt b/Documentation/devicetree/bindings/mfd/syscon.txt deleted file mode 100644 index 25d9e9c2fd53..000000000000 --- a/Documentation/devicetree/bindings/mfd/syscon.txt +++ /dev/null @@ -1,32 +0,0 @@ -* System Controller Registers R/W driver - -System controller node represents a register region containing a set -of miscellaneous registers. The registers are not cohesive enough to -represent as any specific type of device. The typical use-case is for -some other node's driver, or platform-specific code, to acquire a -reference to the syscon node (e.g. by phandle, node path, or search -using a specific compatible value), interrogate the node (or associated -OS driver) to determine the location of the registers, and access the -registers directly. - -Required properties: -- compatible: Should contain "syscon". -- reg: the register region can be accessed from syscon - -Optional property: -- reg-io-width: the size (in bytes) of the IO accesses that should be - performed on the device. -- hwlocks: reference to a phandle of a hardware spinlock provider node. - -Examples: -gpr: iomuxc-gpr@20e0000 { - compatible = "fsl,imx6q-iomuxc-gpr", "syscon"; - reg = <0x020e0000 0x38>; - hwlocks = <&hwlock1 1>; -}; - -hwlock1: hwspinlock@40500000 { - ... - reg = <0x40500000 0x1000>; - #hwlock-cells = <1>; -}; diff --git a/Documentation/devicetree/bindings/misc/allwinner,syscon.txt b/Documentation/devicetree/bindings/misc/allwinner,syscon.txt deleted file mode 100644 index 31494a24fe69..000000000000 --- a/Documentation/devicetree/bindings/misc/allwinner,syscon.txt +++ /dev/null @@ -1,20 +0,0 @@ -* Allwinner sun8i system controller - -This file describes the bindings for the system controller present in -Allwinner SoC H3, A83T and A64. -The principal function of this syscon is to control EMAC PHY choice and -config. - -Required properties for the system controller: -- reg: address and length of the register for the device. -- compatible: should be "syscon" and one of the following string: - "allwinner,sun8i-h3-system-controller" - "allwinner,sun8i-v3s-system-controller" - "allwinner,sun50i-a64-system-controller" - "allwinner,sun8i-a83t-system-controller" - -Example: -syscon: syscon@1c00000 { - compatible = "allwinner,sun8i-h3-system-controller", "syscon"; - reg = <0x01c00000 0x1000>; -}; diff --git a/Documentation/devicetree/bindings/misc/syscon.yaml b/Documentation/devicetree/bindings/misc/syscon.yaml new file mode 100644 index 000000000000..f2d81bed612f --- /dev/null +++ b/Documentation/devicetree/bindings/misc/syscon.yaml @@ -0,0 +1,74 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/misc/syscon.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: System Controller Registers R/W Device Tree Bindings + +description: | + System controller node represents a register region containing a set + of miscellaneous registers. The registers are not cohesive enough to + represent as any specific type of device. The typical use-case is + for some other node's driver, or platform-specific code, to acquire + a reference to the syscon node (e.g. by phandle, node path, or + search using a specific compatible value), interrogate the node (or + associated OS driver) to determine the location of the registers, + and access the registers directly. + +maintainers: + - Lee Jones + +properties: + compatible: + anyOf: + - items: + - enum: + - allwinner,sun8i-a83t-system-controller + - allwinner,sun8i-h3-system-controller + - allwinner,sun8i-v3s-system-controller + - allwinner,sun50i-a64-system-controller + + - const: syscon + + - contains: + const: syscon + additionalItems: true + + reg: + maxItems: 1 + + reg-io-width: + description: | + The size (in bytes) of the IO accesses that should be performed + on the device. + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - enum: [ 1, 2, 4, 8 ] + + hwlocks: + maxItems: 1 + description: + Reference to a phandle of a hardware spinlock provider node. + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + syscon: syscon@1c00000 { + compatible = "allwinner,sun8i-h3-system-controller", "syscon"; + reg = <0x01c00000 0x1000>; + }; + + - | + gpr: iomuxc-gpr@20e0000 { + compatible = "fsl,imx6q-iomuxc-gpr", "syscon"; + reg = <0x020e0000 0x38>; + hwlocks = <&hwlock1 1>; + }; + +...