linux

mirror of https://github.com/hardkernel/linux.git synced 2026-04-02 03:03:00 +09:00

Files

Chris Packham e3098ce15f i2c: mpc: Use atomic read and fix break condition

commit a74c313aca upstream.

Maxime points out that the polling code in mpc_i2c_isr should use the
_atomic API because it is called in an irq context and that the
behaviour of the MCF bit is that it is 1 when the byte transfer is
complete. All of this means the original code was effectively a
udelay(100).

Fix this by using readb_poll_timeout_atomic() and removing the negation
of the break condition.

Fixes: 4a8ac5e45c ("i2c: mpc: Poll for MCF")
Reported-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Tested-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2021-12-14 10:57:15 +01:00

algos

i2c: algo: bit: use new macro to specifiy capabilities

2021-01-22 09:59:21 +01:00

busses

i2c: mpc: Use atomic read and fix break condition

2021-12-14 10:57:15 +01:00

muxes

i2c: muxes: i2c-arb-gpio-challenge: Demote non-conformant kernel-doc headers

2021-05-27 21:29:03 +02:00

i2c-boardinfo.c

i2c: Remove support for dangling device properties