tree 73a4d5a38a19c321a867ae6466dc6b5c689bada7
parent 73871d2b5516fc41da8445834360364e17b042e6
author Marek Vasut <marex@denx.de> 1623326400 +0200
committer Tom Rini <trini@konsulko.com> 1625054790 -0400

spi: Update speed/mode on change

The spi_get_bus_and_cs() may be called on the same bus and chipselect
with different frequency or mode. This is valid usecase, but the code
fails to notify the controller of such a configuration change. Call
spi_set_speed_mode() in case bus frequency or bus mode changed to let
the controller update the configuration.

The problem can easily be triggered using the sspi command:
=> sspi 0:0@1000
=> sspi 0:0@2000
Without this patch, both transfers happen at 1000 Hz. With this patch,
the later transfer happens correctly at 2000 Hz.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>