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Chris Brandt 75aaa6f612 i2c: riic: Clear NACK in tend isr

commit a71e2ac1f3 upstream.

The NACKF flag should be cleared in INTRIICNAKI interrupt processing as
description in HW manual.

This issue shows up quickly when PREEMPT_RT is applied and a device is
probed that is not plugged in (like a touchscreen controller). The result
is endless interrupts that halt system boot.

Fixes: 310c18a414 ("i2c: riic: add driver")
Cc: stable@vger.kernel.org
Reported-by: Chien Nguyen <chien.nguyen.eb@rvc.renesas.com>
Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2019-10-05 12:30:36 +02:00

algos

i2c: algo-bit: declare i2c_bit_quirk_no_clk_stretch as static

2016-05-11 17:16:30 +02:00

busses

i2c: riic: Clear NACK in tend isr

2019-10-05 12:30:36 +02:00

muxes

i2c: mux: reg: put away the parent i2c adapter on probe failure

2018-04-13 19:47:57 +02:00

i2c-boardinfo.c

i2c: remove __init from i2c_register_board_info()