From: Tudor Ambarus Date: Thu, 17 Nov 2022 10:52:42 +0000 (+0200) Subject: spi: dt-bindings: Introduce spi-cs-setup-ns property X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f6c911f3308c;p=linux.git spi: dt-bindings: Introduce spi-cs-setup-ns property SPI NOR flashes have specific cs-setup time requirements without which they can't work at frequencies close to their maximum supported frequency, as they miss the first bits of the instruction command. Unrecognized commands are ignored, thus the flash will be unresponsive. Introduce the spi-cs-setup-ns property to allow spi devices to specify their cs setup time. Signed-off-by: Tudor Ambarus Link: https://lore.kernel.org/r/20221117105249.115649-2-tudor.ambarus@microchip.com Signed-off-by: Mark Brown --- diff --git a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml index dca677f9e1b98..ead2cccf658fd 100644 --- a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml +++ b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml @@ -44,6 +44,11 @@ properties: description: Maximum SPI clocking speed of the device in Hz. + spi-cs-setup-ns: + description: + Delay in nanosecods to be introduced by the controller after CS is + asserted. + spi-rx-bus-width: description: Bus width to the SPI bus used for read transfers.