can: mcp251x: fix support for half duplex SPI host controllers
Some SPI host controllers do not support full-duplex SPI transfers. The function mcp251x_spi_trans() does a full duplex transfer. It is used in several places in the driver, where a TX half duplex transfer is sufficient. To fix support for half duplex SPI host controllers, this patch introduces a new function mcp251x_spi_write() and changes all callers that do a TX half duplex transfer to use mcp251x_spi_write(). Fixes: e0e25001 ("can: mcp251x: add support for half duplex controllers") Link: https://lore.kernel.org/r/20210330100246.1074375-1-mkl@pengutronix.de Cc: Tim Harvey <tharvey@gateworks.com> Tested-By:Tim Harvey <tharvey@gateworks.com> Reported-by:
Gerhard Bertelsmann <info@gerhard-bertelsmann.de> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
parent
08c27f33
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