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clk: at91: clk-master: Add check for divide by 3

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[ Upstream commit e0237f5635 ]

A potential divider for the master clock is div/3. The register
configuration for div/3 is MASTER_PRES_MAX. The current bit shifting
method does not work for this case. Checking for MASTER_PRES_MAX will
ensure the correct decimal value is stored in the system.

Signed-off-by: Ryan Wanner <Ryan.Wanner@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ryan Wanner
2025-09-08 13:07:17 -07:00
committed by Greg Kroah-Hartman
parent 7af4f21976
commit 0fbbc99739
1 changed files with 3 additions and 0 deletions
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3
drivers/clk/at91/clk-master.c
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@@ -580,6 +580,9 @@ clk_sama7g5_master_recalc_rate(struct clk_hw *hw,
{
struct clk_master *master = to_clk_master(hw);
if (master->div == MASTER_PRES_MAX)
return DIV_ROUND_CLOSEST_ULL(parent_rate, 3);
return DIV_ROUND_CLOSEST_ULL(parent_rate, (1 << master->div));
}