spi: dt-bindings: Add num-cs property for mpfs-spi

Browse source

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: 2da187304e ("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>

...

This commit is contained in:

Prajna Rajendra Kumar 2024-05-14 11:45:06 +01:00 • committed by Mark Brown

parent f44b3730b0

commit 3b4c0fbc19

1 changed files with 26 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

29

Documentation/devicetree/bindings/spi/microchip,mpfs-spi.yaml

View file