clocksource: sirf: Fix incorrect clock enable counter for timer
authorZhiwu Song <Zhiwu.Song@csr.com>
Thu, 3 Jul 2014 12:52:51 +0000 (20:52 +0800)
committerDaniel Lezcano <daniel.lezcano@linaro.org>
Wed, 23 Jul 2014 10:02:34 +0000 (12:02 +0200)
commit38941522ecbd2198694b742343a67ea128b44913
tree861ed0477c052cda4d04e8601f90c9667d0cf223
parent40c96312dc3534d97c64d7d69acf1ea14ceff404
clocksource: sirf: Fix incorrect clock enable counter for timer

In the clocksource driver, we didn't explicitly enable the clock. it makes the
clk reference counter wrong. We didn't encounter any hang issue because the
tick's clock input has been open and is shared by some other hardware
components, but if we don't enable those components in kernel, in the stage of
disabling unused clk in kernel boot, Linux tick hangs.

This patch fixes it. it does an explicit prepare and enable to the clock input,
and increases the usage counter of the clk.

Signed-off-by: Zhiwu Song <Zhiwu.Song@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
drivers/clocksource/timer-marco.c
drivers/clocksource/timer-prima2.c