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clk: qcom: Round parent rate in clk_rcg2_determine_rate

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We currently set best_parent_rate to the ideal frequency wanted by the
RCG. This doesn't always align to the exact frequency the parent can
provide. If they differ, then clk_calc_new_rates() will return the
parent as top, even if the rounded parent frequency isn't changing.
This causes clk_propagate_rate_change() to return before being called
for its children, which means children aren't notified of the
PRE_RATE_CHANGE events.

Set best_parent_rate to the rounded rate so that we don't unnecessarily
try to change the parent.

Change-Id: Ic976db7a13dfbc63cb66b032a45060565ca90b43
Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>
This commit is contained in:
Mike Tipton 2021-06-25 05:55:36 -07:00 committed by Mike Tipton
parent b2062dc9f4
commit dec56fe0c0
1 changed files with 1 additions and 1 deletions
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2
drivers/clk/qcom/clk-rcg2.c
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@ -359,7 +359,7 @@ static int _freq_tbl_determine_rate(struct clk_hw *hw, const struct freq_tbl *f,
rate = clk_hw_get_rate(p);
}
req->best_parent_hw = p;
req->best_parent_rate = rate;
req->best_parent_rate = clk_hw_round_rate(p, rate);
req->rate = f->freq;
if (f->src_freq != FIXED_FREQ_SRC) {