[PATCH v9 06/15] dt-bindings: mfd: amd,pensando-elbasr: Add AMD Pensando System Resource chip
From: Brad Larson <hidden>
Date: 2023-01-19 03:52:21
Also in:
linux-devicetree, linux-mmc, linux-spi, lkml
Subsystem:
arm/amd pensando arm64 architecture, open firmware and flattened device tree bindings, spi subsystem, the rest · Maintainers:
Brad Larson, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Mark Brown, Linus Torvalds
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
diff --git a/Documentation/devicetree/bindings/spi/amd,pensando-sr.yaml b/Documentation/devicetree/bindings/spi/amd,pensando-sr.yaml
new file mode 100644
index 000000000000..8504652f6e19
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/amd,pensando-sr.yaml@@ -0,0 +1,68 @@ +# 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>; + }; + }; + +...
--
2.17.1
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