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Message-Id: <20221118005904.23557-2-hayashi.kunihiko@socionext.com>
Date: Fri, 18 Nov 2022 09:59:03 +0900
From: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To: Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Subject: [PATCH 1/2] dt-bindings: spi: Add Socionext F_OSPI controller bindings
Add devicetree binding documentation for Socionext F_OSPI SPI flash
controller.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
---
.../bindings/spi/socionext,f-ospi.yaml | 99 +++++++++++++++++++
1 file changed, 99 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/socionext,f-ospi.yaml
diff --git a/Documentation/devicetree/bindings/spi/socionext,f-ospi.yaml b/Documentation/devicetree/bindings/spi/socionext,f-ospi.yaml
new file mode 100644
index 000000000000..f52cac9ee9f8
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/socionext,f-ospi.yaml
@@ -0,0 +1,99 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/spi/socionext,f-ospi.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Socionext F_OSPI controller
+
+description: |
+ The Socionext F_OSPI is a controller used to interface with flash
+ memories using the SPI communication interface.
+
+maintainers:
+ - Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
+
+allOf:
+ - $ref: "spi-controller.yaml#"
+
+properties:
+ compatible:
+ const: socionext,f-ospi
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ num-cs:
+ minimum: 1
+ maximum: 4
+
+ socionext,cs-start-cycle:
+ description:
+ Specifies the number of SPI_CLK cycles between CS assertion and
+ command transfer.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 15
+
+ socionext,cs-end-cycle:
+ description:
+ Specify the number of SPI_CLK cycles between data transfer and
+ CS deassertion.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 15
+
+ socionext,cs-deassert-clk-cycle:
+ description:
+ Specify the number of SPI_CLK cycles to output while CS is deasserted.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 15
+
+ socionext,alternative-byte:
+ description:
+ Specify the extra bytes to transfer after address transfer.
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ items:
+ - description: the number of bytes to transfer
+ maximum: 4
+ - description: value to transfer
+ default: 0
+ - description: bit-width to transfer
+ enum: [0, 1, 2, 4, 8]
+
+ socionext,data-swap-2byte:
+ description:
+ Indicates swap byte order per 2-bytes.
+ type: boolean
+
+ socionext,data-swap-4byte:
+ description:
+ Indicates swap byte order per 4-bytes.
+ type: boolean
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - "#address-cells"
+ - "#size-cells"
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ ospi0: spi@...00000 {
+ compatible = "socionext,f-ospi";
+ reg = <0x80000000 0x1000>;
+ clocks = <&clks 0>;
+ num-cs = <1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ flash@0 {
+ compatible = "spansion,s25fl128s", "jedec,spi-nor";
+ reg = <0>;
+ spi-max-frequency = <50000000>;
+ };
+ };
--
2.25.1
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