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Date: Wed, 13 Apr 2022 10:13:18 +0300
From: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
To: <linux-clk@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
CC: <mturquette@...libre.com>, <sboyd@...nel.org>,
<nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
<claudiu.beznea@...rochip.com>,
Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
Subject: [PATCH] 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@...rochip.com>
---
drivers/clk/at91/clk-generated.c | 4 ++++
1 file changed, 4 insertions(+)
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) {
--
2.32.0
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