mfd: tqmx86: Do not access I2C_DETECT register through io_base

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[ Upstream commit 1be1b23696 ]

The I2C_DETECT register is at IO port 0x1a7, which is outside the range
passed to devm_ioport_map() for io_base, and was only working because
there aren't actually any bounds checks for IO port accesses.

Extending the range does not seem like a good solution here, as it would
then conflict with the IO resource assigned to the I2C controller. As
this is just a one-off access during probe, use a simple inb() instead.

While we're at it, drop the unused define TQMX86_REG_I2C_INT_EN.

Fixes: 2f17dd34ff ("mfd: tqmx86: IO controller with I2C, Wachdog and GPIO")
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/e8300a30f0791afb67d79db8089fb6004855f378.1676892223.git.matthias.schiffer@ew.tq-group.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Matthias Schiffer 2023-02-20 12:25:44 +01:00 • committed by Greg Kroah-Hartman

parent b3b3f66bd4

commit 8c989fa9e8

1 changed files with 7 additions and 3 deletions

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drivers/mfd/tqmx86.c

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