Commit f6c911f3 authored by Tudor Ambarus's avatar Tudor Ambarus Committed by Mark Brown

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: default avatarTudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20221117105249.115649-2-tudor.ambarus@microchip.comSigned-off-by: default avatarMark Brown <broonie@kernel.org>
parent 84b60f2b
...@@ -44,6 +44,11 @@ properties: ...@@ -44,6 +44,11 @@ properties:
description: description:
Maximum SPI clocking speed of the device in Hz. 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: spi-rx-bus-width:
description: description:
Bus width to the SPI bus used for read transfers. Bus width to the SPI bus used for read transfers.
......
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