can: c_can: Update D_CAN TX and RX functions to 32 bit - fix Altera Cyclone access

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commit 427460c83c upstream.

When testing CAN write floods on Altera's CycloneV, the first 2 bytes
are sometimes 0x00, 0x00 or corrupted instead of the values sent. Also
observed bytes 4 & 5 were corrupted in some cases.

The D_CAN Data registers are 32 bits and changing from 16 bit writes to
32 bit writes fixes the problem.

Testing performed on Altera CycloneV (D_CAN).  Requesting tests on other
C_CAN & D_CAN platforms.

Reported-by: Richard Andrysek <richard.andrysek@gomtec.de>
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Thor Thayer 2016-06-16 11:10:19 -05:00 • committed by Ben Hutchings

parent f3ce5ab490

commit 2283ea0ed9

1 changed files with 31 additions and 7 deletions

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drivers/net/can/c_can/c_can.c

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