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clk: at91: generated: consider range when calculating best rate

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[ Upstream commit d0031e6fbed955ff8d5f5bbc8fe7382482559cec ]

clk_generated_best_diff() helps in finding the parent and the divisor to
compute a rate closest to the required one. However, it doesn't take into
account the request's range for the new rate. Make sure the new rate
is within the required range.

Fixes: 8a8f4bf0c4 ("clk: at91: clk-generated: create function to find best_diff")
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20220413071318.244912-1-codrin.ciubotariu@microchip.com
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Codrin Ciubotariu 2022-04-13 10:13:18 +03:00 committed by Greg Kroah-Hartman
parent 8cb1a05fe3
commit d672eee9e4
1 changed files with 4 additions and 0 deletions
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4
drivers/clk/at91/clk-generated.c
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@ -105,6 +105,10 @@ static void clk_generated_best_diff(struct clk_rate_request *req,
tmp_rate = parent_rate;
else
tmp_rate = parent_rate / div;
if (tmp_rate < req->min_rate || tmp_rate > req->max_rate)
return;
tmp_diff = abs(req->rate - tmp_rate);
if (*best_diff < 0 || *best_diff >= tmp_diff) {