From 3b4c0fbc19930af0904fb5995ed4e7b6ffe0b237 Mon Sep 17 00:00:00 2001 From: Prajna Rajendra Kumar Date: Tue, 14 May 2024 11:45:06 +0100 Subject: [PATCH] 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 Link: https://msgid.link/r/20240514104508.938448-2-prajna.rajendrakumar@microchip.com Reviewed-by: Conor Dooley Signed-off-by: Mark Brown --- .../bindings/spi/microchip,mpfs-spi.yaml | 29 +++++++++++++++++-- 1 file 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 74a817cc7d942..ffa8d1b48f8bd 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 -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: -- 2.47.3