IBM Power processors have a SPI controller that can be accessed over FSI from a service processor. Document it. Signed-off-by: Eddie James <eajames@xxxxxxxxxxxxx> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> --- This patch was previously included in https://lore.kernel.org/all/20240429210131.373487-1-eajames@xxxxxxxxxxxxx/ No changes since v3. Changes since v2: - Change name from ibm,p10-spi to ibm,spi-fsi for two reasons. One, this matches the I2C controller binding (ibm,i2c-fsi), and two, this binding is specifically for the FSI-attached SPI controllers on the P10 but accessed from the service processor. P10 SPI controllers accessed from the P10 would have different bindings. - Fix warnings by using generic FSI parent node - Fix prefix .../devicetree/bindings/spi/ibm,spi-fsi.yaml | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/ibm,spi-fsi.yaml diff --git a/Documentation/devicetree/bindings/spi/ibm,spi-fsi.yaml b/Documentation/devicetree/bindings/spi/ibm,spi-fsi.yaml new file mode 100644 index 0000000000000..d7fec4c3a8016 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/ibm,spi-fsi.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/ibm,spi-fsi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: IBM FSI-attached SPI Controller + +maintainers: + - Eddie James <eajames@xxxxxxxxxxxxx> + +description: + A SPI controller found on IBM Power processors, accessed over FSI from a + service processor. This node will always be a child node of an ibm,fsi2spi + node. + +properties: + compatible: + enum: + - ibm,spi-fsi + + reg: + maxItems: 1 + +required: + - compatible + - reg + +allOf: + - $ref: spi-controller.yaml# + +unevaluatedProperties: false + +examples: + - | + fsi { + #address-cells = <1>; + #size-cells = <0>; + + spi@0 { + compatible = "ibm,spi-fsi"; + reg = <0>; + #address-cells = <1>; + #size-cells = <0>; + + eeprom@0 { + compatible = "atmel,at25"; + reg = <0>; + size = <0x80000>; + address-width = <24>; + pagesize = <256>; + spi-max-frequency = <1000000>; + }; + }; + }; -- 2.39.3
