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+# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/amd,pensando-sr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AMD Pensando SoC Resource Controller
+
+description: |
+ AMD Pensando SoC Resource Controller is a set of
+ control/status registers accessed on four chip-selects.
+ This device is present in all Pensando SoC based designs.
+
+maintainers:
+ - Brad Larson <blarson@amd.com>
+
+properties:
+ compatible:
+ contains:
+ enum:
+ - amd,pensando-sr
+
+ reg:
+ minItems: 1
+
+ cs:
+ minItems: 1
+ maxItems: 4
+ description:
+ Device chip select
+
+ '#reset-cells':
+ const: 1
+
+ interrupts:
+ maxItems: 1
+
+ spi-max-frequency: true
+
+required:
+ - compatible
+ - cs
+ - spi-max-frequency
+ - '#reset-cells'
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ num-cs = <4>;
+
+ system-controller@0 {
+ compatible = "amd,pensando-sr";
+ reg = <0>;
+ cs = <0 1 2 3>;
+ spi-max-frequency = <12000000>;
+ interrupt-parent = <&porta>;
+ interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+ #reset-cells = <1>;
+ };
+ };
+
+...
Add support for the AMD Pensando SoC System Resource chip using the SPI interface. The device functions are accessed using four chip-selects. This device is present for all Pensando SoC designs. Signed-off-by: Brad Larson <blarson@amd.com> --- Changes since v6: - Instead of four nodes, one per chip-select, a single node is used with reset-cells in the parent. - No MFD API is used anymore in the driver so it made sense to move this to drivers/spi. - This driver is common for all Pensando SoC based designs so changed the name to pensando-sr.c to not make it Elba SoC specific. - Added property cs for the chip-select number which is used by the driver to create /dev/pensr0.<cs> --- .../bindings/spi/amd,pensando-sr.yaml | 68 +++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/amd,pensando-sr.yaml