From b467e08a15563dede0d37d3233baa24fb97a7310 Mon Sep 17 00:00:00 2001 From: Icenowy Zheng Date: Sat, 18 Mar 2017 04:19:43 +0800 Subject: [PATCH] clk: sunxi-ng: fix recalc_rate formula of NKMP clocks In commit e66f81bbd746 ("clk: sunxi-ng: Implement factors offsets"), the final formula of NKMP clocks' recalc_rate is refactored; however, the refactored formula broke the calculation due to some C language operand priority problem -- the priority of operand >> is lower than * and /, makes the formula being parsed as "(parent_rate * n * k) >> (p / m)", but it should be "(parent_rate * n * k >> p) / m". Add the pair of parentheses to fix up this issue. This pair of parentheses used to exist in the old formula. Fixes: e66f81bbd746 ("clk: sunxi-ng: Implement factors offsets") Signed-off-by: Icenowy Zheng Signed-off-by: Maxime Ripard --- drivers/clk/sunxi-ng/ccu_nkmp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c index a2b40a0..488055e 100644 --- a/drivers/clk/sunxi-ng/ccu_nkmp.c +++ b/drivers/clk/sunxi-ng/ccu_nkmp.c @@ -107,7 +107,7 @@ static unsigned long ccu_nkmp_recalc_rate(struct clk_hw *hw, p = reg >> nkmp->p.shift; p &= (1 << nkmp->p.width) - 1; - return parent_rate * n * k >> p / m; + return (parent_rate * n * k >> p) / m; } static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate, -- 2.7.4