From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Gaignard Subject: [PATCH v2] dt-bindings: spi: Convert stm32 spi bindings to json-schema Date: Tue, 17 Dec 2019 10:07:15 +0100 Message-ID: <20191217090715.13334-1-benjamin.gaignard@st.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: devicetree@vger.kernel.org, Amelie Delaunay , Benjamin Gaignard , linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, Erwan Leray , Fabrice Gasnier , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org To: , , , Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org List-Id: linux-spi.vger.kernel.org Convert the STM32 spi binding to DT schema format using json-schema Signed-off-by: Benjamin Gaignard CC: Erwan Leray CC: Fabrice Gasnier CC: Amelie Delaunay --- changes in version 2: - fix typo in if block (compatible + contains) The boths typos weren't detected by checkpatch. - remove type for st,spi-midi-ns property but not add upper limit because the driver compute a delay (expressed in SPI clock cycles periods) from this value (expressed in nanoseconds) and all that depends of the SPI bus clock. .../devicetree/bindings/spi/spi-stm32.txt | 62 ------------ .../devicetree/bindings/spi/st,stm32-spi.yaml | 105 +++++++++++++++++++++ 2 files changed, 105 insertions(+), 62 deletions(-) delete mode 100644 Documentation/devicetree/bindings/spi/spi-stm32.txt create mode 100644 Documentation/devicetree/bindings/spi/st,stm32-spi.yaml diff --git a/Documentation/devicetree/bindings/spi/spi-stm32.txt b/Documentation/devicetree/bindings/spi/spi-stm32.txt deleted file mode 100644 index d82755c63eaf..000000000000 --- a/Documentation/devicetree/bindings/spi/spi-stm32.txt +++ /dev/null @@ -1,62 +0,0 @@ -STMicroelectronics STM32 SPI Controller - -The STM32 SPI controller is used to communicate with external devices using -the Serial Peripheral Interface. It supports full-duplex, half-duplex and -simplex synchronous serial communication with external devices. It supports -from 4 to 32-bit data size. Although it can be configured as master or slave, -only master is supported by the driver. - -Required properties: -- compatible: Should be one of: - "st,stm32h7-spi" - "st,stm32f4-spi" -- reg: Offset and length of the device's register set. -- interrupts: Must contain the interrupt id. -- clocks: Must contain an entry for spiclk (which feeds the internal clock - generator). -- #address-cells: Number of cells required to define a chip select address. -- #size-cells: Should be zero. - -Optional properties: -- resets: Must contain the phandle to the reset controller. -- A pinctrl state named "default" may be defined to set pins in mode of - operation for SPI transfer. -- dmas: DMA specifiers for tx and rx dma. DMA fifo mode must be used. See the - STM32 DMA bindings, Documentation/devicetree/bindings/dma/stm32-dma.txt. -- dma-names: DMA request names should include "tx" and "rx" if present. -- cs-gpios: list of GPIO chip selects. See the SPI bus bindings, - Documentation/devicetree/bindings/spi/spi-bus.txt - - -Child nodes represent devices on the SPI bus - See ../spi/spi-bus.txt - -Optional properties: -- st,spi-midi-ns: Only for STM32H7, (Master Inter-Data Idleness) minimum time - delay in nanoseconds inserted between two consecutive data - frames. - - -Example: - spi2: spi@40003800 { - #address-cells = <1>; - #size-cells = <0>; - compatible = "st,stm32h7-spi"; - reg = <0x40003800 0x400>; - interrupts = <36>; - clocks = <&rcc SPI2_CK>; - resets = <&rcc 1166>; - dmas = <&dmamux1 0 39 0x400 0x01>, - <&dmamux1 1 40 0x400 0x01>; - dma-names = "rx", "tx"; - pinctrl-0 = <&spi2_pins_b>; - pinctrl-names = "default"; - cs-gpios = <&gpioa 11 0>; - - aardvark@0 { - compatible = "totalphase,aardvark"; - reg = <0>; - spi-max-frequency = <4000000>; - st,spi-midi-ns = <4000>; - }; - }; diff --git a/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml b/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml new file mode 100644 index 000000000000..f0d979664f07 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml @@ -0,0 +1,105 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/st,stm32-spi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: STMicroelectronics STM32 SPI Controller bindings + +description: | + The STM32 SPI controller is used to communicate with external devices using + the Serial Peripheral Interface. It supports full-duplex, half-duplex and + simplex synchronous serial communication with external devices. It supports + from 4 to 32-bit data size. + +maintainers: + - Erwan Leray + - Fabrice Gasnier + +allOf: + - $ref: "spi-controller.yaml#" + - if: + properties: + compatible: + contains: + const: st,stm32f4-spi + + then: + properties: + st,spi-midi-ns: false + +properties: + compatible: + enum: + - st,stm32f4-spi + - st,stm32h7-spi + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + interrupts: + maxItems: 1 + + resets: + maxItems: 1 + + dmas: + description: | + DMA specifiers for tx and rx dma. DMA fifo mode must be used. See + the STM32 DMA bindings Documentation/devicetree/bindings/dma/stm32-dma.txt. + items: + - description: rx DMA channel + - description: tx DMA channel + + dma-names: + items: + - const: rx + - const: tx + +patternProperties: + "^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-f]+$": + type: object + # SPI slave nodes must be children of the SPI master node and can + # contain the following properties. + properties: + st,spi-midi-ns: + description: | + Only for STM32H7, (Master Inter-Data Idleness) minimum time + delay in nanoseconds inserted between two consecutive data frames. + +required: + - compatible + - reg + - clocks + - interrupts + +examples: + - | + #include + #include + #include + spi@4000b000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "st,stm32h7-spi"; + reg = <0x4000b000 0x400>; + interrupts = ; + clocks = <&rcc SPI2_K>; + resets = <&rcc SPI2_R>; + dmas = <&dmamux1 0 39 0x400 0x05>, + <&dmamux1 1 40 0x400 0x05>; + dma-names = "rx", "tx"; + cs-gpios = <&gpioa 11 0>; + + aardvark@0 { + compatible = "totalphase,aardvark"; + reg = <0>; + spi-max-frequency = <4000000>; + st,spi-midi-ns = <4000>; + }; + }; + +... -- 2.15.0