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authorCodrin Ciubotariu <codrin.ciubotariu@microchip.com>2022-04-13 10:13:18 +0300
committerStephen Boyd <sboyd@kernel.org>2022-05-17 22:41:07 +0300
commitd0031e6fbed955ff8d5f5bbc8fe7382482559cec (patch)
treee2b48cf69a42db8f3559554e68d63ac4c3cf9a62 /drivers/clk
parent60d9f050da63b71392810af9b69ca8de6d23a17a (diff)
downloadlinux-d0031e6fbed955ff8d5f5bbc8fe7382482559cec.tar.xz
clk: at91: generated: consider range when calculating best rate
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>
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/at91/clk-generated.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c
index 23cc8297ec4c..d429ba52a719 100644
--- a/drivers/clk/at91/clk-generated.c
+++ b/drivers/clk/at91/clk-generated.c
@@ -117,6 +117,10 @@ 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) {