i2c: npcm: Remove own slave addresses 2:10

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[ Upstream commit 47d506d1a2 ]

NPCM can support up to 10 own slave addresses. In practice, only one
address is actually being used. In order to access addresses 2 and above,
need to switch register banks. The switch needs spinlock.
To avoid using spinlock for this useless feature removed support of SA >=
2. Also fix returned slave event enum.

Remove some comment since the bank selection is not required. The bank
selection is not required since the supported slave addresses are reduced.

Fixes: 56a1485b10 ("i2c: npcm7xx: Add Nuvoton NPCM I2C controller driver")
Signed-off-by: Tali Perry <tali.perry1@gmail.com>
Signed-off-by: Tyrone Ting <kfting@nuvoton.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Tali Perry 2022-05-25 11:23:38 +08:00 • committed by Greg Kroah-Hartman

parent 308d0d5d98

commit 261aeadc7b

1 changed files with 16 additions and 25 deletions

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drivers/i2c/busses/i2c-npcm7xx.c

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