clk: sunxi-ng: Wait for lock when using fractional mode
Currently ccu_frac_helper_set_rate() doesn't wait for a lock bit to be set before returning. Because of that, unstable clock may be used. Add a wait for lock in the helper function. Fixes: 89a3dfb7 ("clk: sunxi-ng: Add fractional lib") Signed-off-by: NJernej Skrabec <jernej.skrabec@siol.net> Signed-off-by: NChen-Yu Tsai <wens@csie.org>
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