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Date: Wed, 7 Jul 2021 16:12:13 +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>,
<ludovic.desroches@...rochip.com>, <claudiu.beznea@...rochip.com>,
"Codrin Ciubotariu" <codrin.ciubotariu@...rochip.com>
Subject: [PATCH] clk: at91: clk-generated: Limit the requested rate to our range
On clk_generated_determine_rate(), the requested rate could be outside
of clk's range. Limit the rate to the clock's range to not return an
error.
Fixes: df70aeef6083 ("clk: at91: add generated clock driver")
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
---
drivers/clk/at91/clk-generated.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c
index b4fc8d71daf2..b656d25a9767 100644
--- a/drivers/clk/at91/clk-generated.c
+++ b/drivers/clk/at91/clk-generated.c
@@ -128,6 +128,12 @@ static int clk_generated_determine_rate(struct clk_hw *hw,
int i;
u32 div;
+ /* do not look for a rate that is outside of our range */
+ if (gck->range.max && req->rate > gck->range.max)
+ req->rate = gck->range.max;
+ if (gck->range.min && req->rate < gck->range.min)
+ req->rate = gck->range.min;
+
for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
if (gck->chg_pid == i)
continue;
--
2.30.2
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