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| author | Prajna Rajendra Kumar <prajna.rajendrakumar@microchip.com> | 2024-05-14 11:45:06 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-05-27 01:33:14 +0100 |
| commit | 3b4c0fbc19930af0904fb5995ed4e7b6ffe0b237 (patch) | |
| tree | 1678ed837f50ab4db163ed34320377f41c52fb5b | |
| parent | Merge existing fixes from spi/for-6.10 into new branch (diff) | |
| download | linux-3b4c0fbc19930af0904fb5995ed4e7b6ffe0b237.tar.gz linux-3b4c0fbc19930af0904fb5995ed4e7b6ffe0b237.zip | |
spi: dt-bindings: Add num-cs property for mpfs-spi
The PolarFire SoC SPI "hard" controller supports eight CS lines, out of
which only one CS line is physically wired. The default value of
'num-cs' was never set and it did not didn't impose a maximum value.
To reflect this hardware limitation in the device tree, the binding
enforces that the 'num-cs' property cannot exceed 1 unless additional
CS lines are explicitly defined using GPIO descriptors.
Fixes: 2da187304e55 ("spi: add bindings for microchip mpfs spi")
Signed-off-by: Prajna Rajendra Kumar <prajna.rajendrakumar@microchip.com>
Link: https://msgid.link/r/20240514104508.938448-2-prajna.rajendrakumar@microchip.com
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/spi/microchip,mpfs-spi.yaml | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/spi/microchip,mpfs-spi.yaml b/Documentation/devicetree/bindings/spi/microchip,mpfs-spi.yaml index 74a817cc7d94..ffa8d1b48f8b 100644 --- a/Documentation/devicetree/bindings/spi/microchip,mpfs-spi.yaml +++ b/Documentation/devicetree/bindings/spi/microchip,mpfs-spi.yaml @@ -13,9 +13,6 @@ description: maintainers: - Conor Dooley <conor.dooley@microchip.com> -allOf: - - $ref: spi-controller.yaml# - properties: compatible: oneOf: @@ -43,6 +40,32 @@ required: - interrupts - clocks +allOf: + - $ref: spi-controller.yaml# + + - if: + properties: + compatible: + contains: + const: microchip,mpfs-spi + then: + properties: + num-cs: + default: 1 + + - if: + properties: + compatible: + contains: + const: microchip,mpfs-spi + not: + required: + - cs-gpios + then: + properties: + num-cs: + maximum: 1 + unevaluatedProperties: false examples: |