can: mcp251x: add support for half duplex controllers

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Some SPI host controllers do not support full-duplex SPI and are
marked as such via the SPI_CONTROLLER_HALF_DUPLEX controller flag.

For such controllers use half duplex transactions but retain full
duplex transactions for the controllers that can handle those.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Link: https://lore.kernel.org/r/1595516275-1179-1-git-send-email-tharvey@gateworks.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

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Tim Harvey 2020-07-23 07:57:55 -07:00 • committed by Marc Kleine-Budde

parent 74fa565b63

commit e0e25001d0

1 changed files with 27 additions and 7 deletions

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drivers/net/can/spi/mcp251x.c

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