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Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Converted the brcm,bcm2835-aux-spi.txt file to its respective yaml file format. Signed-off-by: Karan Sanghavi --- While running make CHECK_DTBS=3Dy broadcom/bcm2711-rpi-4-b.dtb, I encountered an error related to the compatible property for brcm,bcm2835-aux-spi. To resolve this, I converted the text file to a YAML binding file and checked it with make dt_binding_check DT_SCHEMA_FILES=3Dbrcm,bcm2835-aux-spi.yaml and make CHECK_DTBS=3Dy broadcom/bcm2711-rpi-4-b.dtb and generates no error. However, I have a question regarding the cs-gpios property. The BCM2711 datasheet mentions that each Universal SPI Master has 3 independent chip selects. I=E2=80=99m wondering if this means these chip select (CS) pins are native, or if we still need to attach GPIOs to them. If GPIOs are required for these 3 CS pins, does that mean we also need to include them in the device tree schema? and also as arequired property in binding? .../bindings/spi/brcm,bcm2835-aux-spi.txt | 38 ----------- .../bindings/spi/brcm,bcm2835-aux-spi.yaml | 66 +++++++++++++++++++ 2 files changed, 66 insertions(+), 38 deletions(-) delete mode 100644 Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-= spi.txt create mode 100644 Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-= spi.yaml diff --git a/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt= b/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt deleted file mode 100644 index d7668f41b03b..000000000000 --- a/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt +++ /dev/null @@ -1,38 +0,0 @@ -Broadcom BCM2835 auxiliary SPI1/2 controller - -The BCM2835 contains two forms of SPI master controller, one known simply = as -SPI0, and the other known as the "Universal SPI Master"; part of the -auxiliary block. This binding applies to the SPI1/2 controller. - -Required properties: -- compatible: Should be "brcm,bcm2835-aux-spi". -- reg: Should contain register location and length for the spi block -- interrupts: Should contain shared interrupt of the aux block -- clocks: The clock feeding the SPI controller - needs to - point to the auxiliary clock driver of the bcm2835, - as this clock will enable the output gate for the specific - clock. -- cs-gpios: the cs-gpios (native cs is NOT supported) - see also spi-bus.txt - -Example: - -spi1@7e215080 { - compatible =3D "brcm,bcm2835-aux-spi"; - reg =3D <0x7e215080 0x40>; - interrupts =3D <1 29>; - clocks =3D <&aux_clocks BCM2835_AUX_CLOCK_SPI1>; - #address-cells =3D <1>; - #size-cells =3D <0>; - cs-gpios =3D <&gpio 18>, <&gpio 17>, <&gpio 16>; -}; - -spi2@7e2150c0 { - compatible =3D "brcm,bcm2835-aux-spi"; - reg =3D <0x7e2150c0 0x40>; - interrupts =3D <1 29>; - clocks =3D <&aux_clocks BCM2835_AUX_CLOCK_SPI2>; - #address-cells =3D <1>; - #size-cells =3D <0>; - cs-gpios =3D <&gpio 43>, <&gpio 44>, <&gpio 45>; -}; diff --git a/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.yam= l b/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.yaml new file mode 100644 index 000000000000..4c24cf2fe214 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.yaml @@ -0,0 +1,66 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/brcm,bcm2835-aux-spi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Broadcom BCM2835 Auxiliary SPI1/2 Controller + +maintainers: + - Karan Sanghavi + +description: | + The BCM2835 contains two forms of SPI master controller. One is known si= mply as + SPI0, and the other as the "Universal SPI Master," part of the auxiliary= block. + This binding applies to the SPI1 and SPI2 auxiliary controllers. + +allOf: + - $ref: spi-controller.yaml# + +properties: + compatible: + enum: + - brcm,bcm2835-aux-spi + description: Broadcom BCM2835 Auxiliary SPI controller for SPI1 and SP= I2. + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + items: + - description: Reference to the auxiliary clock driver for the BCM28= 35. + +required: + - compatible + - reg + - interrupts + - clocks + +unevaluatedProperties: false + +examples: + - | + #include + spi@7e215080 { + compatible =3D "brcm,bcm2835-aux-spi"; + reg =3D <0x7e215080 0x40>; + interrupts =3D <1 29>; + clocks =3D <&aux_clocks BCM2835_AUX_CLOCK_SPI1>; + #address-cells =3D <1>; + #size-cells =3D <0>; + }; + + - | + #include + spi@7e2150c0 { + compatible =3D "brcm,bcm2835-aux-spi"; + reg =3D <0x7e2150c0 0x40>; + interrupts =3D <1 29>; + clocks =3D <&aux_clocks BCM2835_AUX_CLOCK_SPI2>; + #address-cells =3D <1>; + #size-cells =3D <0>; + }; + --=20 2.43.0