From ffe9819b6766b9a623822f3427df4953ab448127 Mon Sep 17 00:00:00 2001 From: Alexandru Ardelean Date: Mon, 21 Dec 2020 17:29:36 +0200 Subject: [PATCH] spi: dt-bindings: document zero value for spi-{rx,tx}-bus-width properties Following a change to the SPI framework, providing a value of zero for 'spi-rx-bus-width' and 'spi-tx-bus-width' is now possible and will essentially mean that no RX or TX is allowed. Reviewed-by: Rob Herring Signed-off-by: Alexandru Ardelean Link: https://lore.kernel.org/r/20201221152936.53873-3-alexandru.ardelean@analog.com Signed-off-by: Mark Brown --- Documentation/devicetree/bindings/spi/spi-controller.yaml | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/spi/spi-controller.yaml b/Documentation/devicetree/bindings/spi/spi-controller.yaml index 5f50581..06786f1 100644 --- a/Documentation/devicetree/bindings/spi/spi-controller.yaml +++ b/Documentation/devicetree/bindings/spi/spi-controller.yaml @@ -152,8 +152,9 @@ patternProperties: spi-rx-bus-width: description: Bus width to the SPI bus used for read transfers. + If 0 is provided, then no RX will be possible on this device. $ref: /schemas/types.yaml#/definitions/uint32 - enum: [1, 2, 4, 8] + enum: [0, 1, 2, 4, 8] default: 1 spi-rx-delay-us: @@ -163,8 +164,9 @@ patternProperties: spi-tx-bus-width: description: Bus width to the SPI bus used for write transfers. + If 0 is provided, then no TX will be possible on this device. $ref: /schemas/types.yaml#/definitions/uint32 - enum: [1, 2, 4, 8] + enum: [0, 1, 2, 4, 8] default: 1 spi-tx-delay-us: -- 2.7.4