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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Jan 2023 03:52:35.5827 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: fe0166cb-2001-4a19-45b7-08daf9d099ee X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT099.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4079 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org 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 --- 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. --- .../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 + +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 + + 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>; + }; + }; + +...