i2c: cadence: Avoid fifo clear after start

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[ Upstream commit c2e55b449d ]

The Driver unintentionally programs ctrl reg to clear the fifo, which
happens after the start of transaction. Previously, this was not an issue
as it involved read-modified-write. However, this issue breaks i2c reads
on QEMU, as i2c-read is executed before guest starts programming control
register.

Fixes: ff0cf7bca6 ("i2c: cadence: Remove unnecessary register reads")
Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@amd.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Sai Pavan Boddu 2024-05-03 15:12:08 +05:30 • committed by Greg Kroah-Hartman

parent ec3468221e

commit bb220136ae

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drivers/i2c/busses/i2c-cadence.c

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