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(parent: 18d30c0) | patch
i2c: pxa: clear all master action bits in i2c_pxa_stop_message()
authorRussell King <rmk+kernel@armlinux.org.uk>
Wed, 6 May 2020 09:36:38 +0000 (10:36 +0100)
committerWolfram Sang <wsa@kernel.org>
Tue, 12 May 2020 10:37:15 +0000 (12:37 +0200)
commite81c979f4e071d516aa27cf5a0c3939da00dc1ca
tree60cd98b891b6cfcd2a5475ece284f48ce620ea09tree | snapshot
parent18d30c0946f912cdb86ab0417661eccda6342375commit | diff
i2c: pxa: clear all master action bits in i2c_pxa_stop_message()

If we timeout during a message transfer, the control register may
contain bits that cause an action to be set. Read-modify-writing the
register leaving these bits set may trigger the hardware to attempt
one of these actions unintentionally.

Always clear these bits when cleaning up after a message or after
a timeout.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
drivers/i2c/busses/i2c-pxa.c diff | blob | history
Domain: System / Kernel;