[PATCH v4 01/17] spi: dt-bindings: Document the IBM FSI-attached SPI controller

Eddie James
2024-04-29T21:01:51Z

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@linux.ibm.com>
---
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 000000000000..d7fec4c3a801
--- /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@linux.ibm.com>
+
+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