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authorChen-Yu Tsai2017-10-12 16:36:58 +0800
committerMaxime Ripard2017-10-13 09:27:00 +0200
commit4cdbc40d64d4b8303a97e29a52862e4d99502beb (patch)
tree008c4de280ac88ac3296ba6a422995f579202e61 /drivers/clk/sunxi-ng
parentd51fe3ba9773c8b6fc79f82bbe75d64baf604292 (diff)
clk: sunxi-ng: nm: Check if requested rate is supported by fractional clock
The round_rate callback for N-M-factor style clocks does not check if the requested clock rate is supported by the fractional clock mode. While this doesn't affect usage in practice, since the clock rates are also supported through N-M factors, it does not match the set_rate code. Add a check to the round_rate callback so it matches the set_rate callback. Fixes: 6174a1e24b0d ("clk: sunxi-ng: Add N-M-factor clock support") Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Diffstat (limited to 'drivers/clk/sunxi-ng')
-rw-r--r--drivers/clk/sunxi-ng/ccu_nm.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/clk/sunxi-ng/ccu_nm.c b/drivers/clk/sunxi-ng/ccu_nm.c
index a32158e8f2e3..84a5e7f17f6f 100644
--- a/drivers/clk/sunxi-ng/ccu_nm.c
+++ b/drivers/clk/sunxi-ng/ccu_nm.c
@@ -99,6 +99,9 @@ static long ccu_nm_round_rate(struct clk_hw *hw, unsigned long rate,
struct ccu_nm *nm = hw_to_ccu_nm(hw);
struct _ccu_nm _nm;
+ if (ccu_frac_helper_has_rate(&nm->common, &nm->frac, rate))
+ return rate;
+
_nm.min_n = nm->n.min ?: 1;
_nm.max_n = nm->n.max ?: 1 << nm->n.width;
_nm.min_m = 1;