i2c: imx-lpi2c: check only for enabled interrupt flags

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[ Upstream commit 1c78850045 ]

When reading from I2C, the Tx watermark is set to 0. Unfortunately the
TDF (transmit data flag) is enabled when Tx FIFO entries is equal or less
than watermark. So it is set in every case, hence the reset default of 1.
This results in the MSR_RDF _and_ MSR_TDF flags to be set thus trying
to send Tx data on a read message.
Mask the IRQ status to filter for wanted flags only.

Fixes: a55fa9d0e4 ("i2c: imx-lpi2c: add low power i2c bus driver")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Tested-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Alexander Stein 2023-01-30 16:32:47 +01:00 • committed by Greg Kroah-Hartman

parent b2f10e87f4

commit 8906737c78

1 changed files with 4 additions and 0 deletions

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drivers/i2c/busses/i2c-imx-lpi2c.c

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