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| author | Codrin Ciubotariu <codrin.ciubotariu@microchip.com> | 2022-04-13 10:13:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-25 09:41:20 +0300 |
| commit | b79bc9f2779117e8f18f82076daccca8c0a10386 (patch) | |
| tree | 3d889097e100173a541a98ecb780ae1c5def3381 | |
| parent | 5fd9a74bf04a1eae5dbde8ca8585106d4410427f (diff) | |
| download | linux-b79bc9f2779117e8f18f82076daccca8c0a10386.tar.xz | |
clk: at91: generated: consider range when calculating best rate
[ 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: 8a8f4bf0c480 ("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>
| -rw-r--r-- | drivers/clk/at91/clk-generated.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c index ea23002be4de..b397556c34d9 100644 --- a/drivers/clk/at91/clk-generated.c +++ b/drivers/clk/at91/clk-generated.c @@ -119,6 +119,10 @@ 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) { |