diff options
| author | Chen-Yu Tsai <wens@csie.org> | 2025-08-31 01:08:56 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-25 11:16:54 +0200 |
| commit | 40108f69c372af3aea73e7829d6849a44638d662 (patch) | |
| tree | 16232791a6d1a061e2562b6f4d77d68719c3c677 | |
| parent | f9fa006e35272c025fe587a067e9f9f87e8ea9fc (diff) | |
clk: sunxi-ng: mp: Fix dual-divider clock rate readback
commit 25fbbaf515acd13399589bd5ee6de5f35740cef2 upstream.
When dual-divider clock support was introduced, the P divider offset was
left out of the .recalc_rate readback function. This causes the clock
rate to become bogus or even zero (possibly due to the P divider being
1, leading to a divide-by-zero).
Fix this by incorporating the P divider offset into the calculation.
Fixes: 45717804b75e ("clk: sunxi-ng: mp: introduce dual-divider clock")
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Link: https://patch.msgid.link/20250830170901.1996227-4-wens@kernel.org
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/clk/sunxi-ng/ccu_mp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/clk/sunxi-ng/ccu_mp.c b/drivers/clk/sunxi-ng/ccu_mp.c index 354c981943b6..4221b1888b38 100644 --- a/drivers/clk/sunxi-ng/ccu_mp.c +++ b/drivers/clk/sunxi-ng/ccu_mp.c @@ -185,7 +185,7 @@ static unsigned long ccu_mp_recalc_rate(struct clk_hw *hw, p &= (1 << cmp->p.width) - 1; if (cmp->common.features & CCU_FEATURE_DUAL_DIV) - rate = (parent_rate / p) / m; + rate = (parent_rate / (p + cmp->p.offset)) / m; else rate = (parent_rate >> p) / m; |