rtc: sun6i: Add some locking
authorMaxime Ripard <maxime.ripard@free-electrons.com>
Mon, 23 Jan 2017 10:41:47 +0000 (11:41 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 12 Mar 2017 05:37:30 +0000 (06:37 +0100)
commitee360e99dae09a4b735aa24cc84f792bb82eb0ab
tree847d6bffb5bd0dbe0474d8d197c13707f15aa16a
parenta0378b5bfc2700365829858e3ab95a5995a3f266
rtc: sun6i: Add some locking

commit a9422a19ce270a22fc520f2278fb7e80c58be508 upstream.

Some registers have a read-modify-write access pattern that are not atomic.

Add some locking to prevent from concurrent accesses.

Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/rtc/rtc-sun6i.c