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clk: bcm2835: fix bcm2835_clock_choose_div 

The commit 09e3b18ca5 ("clk: bcm2835: Remove unused variable")
accidentially breaks the behavior of bcm2835_clock_choose_div() and
booting of Raspberry Pi. The removed do_div macro call had side effects,
so we need to restore it.

Fixes: 09e3b18ca5 ("clk: bcm2835: Remove unused variable")
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/20220428183010.1635248-1-stefan.wahren@i2se.com
Tested-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Stefan Wahren 2022-04-28 20:30:10 +02:00 committed by Stephen Boyd
parent a91b05f6b9
commit 88110a9f62
1 changed files with 1 additions and 0 deletions
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drivers/clk/bcm/clk-bcm2835.c
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@ -941,6 +941,7 @@ static u32 bcm2835_clock_choose_div(struct clk_hw *hw,
u64 temp = (u64)parent_rate << CM_DIV_FRAC_BITS;
u32 div, mindiv, maxdiv;
do_div(temp, rate);
div = temp;
div &= ~unused_frac_mask;