tc_mode() can be called from interrupt context and thus must not call
clk_*prepare*() functions.
Signed-off-by: NDavid Jander <david@protonic.nl>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>