From 196de71a9d9e9090406a87362d22b67ae633fa7a Mon Sep 17 00:00:00 2001
From: James Liao <jamesjj.liao@mediatek.com>
Date: Fri, 10 Jul 2015 16:39:33 +0800
Subject: [PATCH] clk: mediatek: Fix calculation of PLL rate settings
Avoid u32 overflow when calculate post divider setting, and
increase the max post divider setting from 3 (/8) to 4 (/16).
Signed-off-by: James Liao <jamesjj.liao@mediatek.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
drivers/clk/mediatek/clk-pll.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c
index 68af5183cda0..0e3f4ef0e871 100644
--- a/drivers/clk/mediatek/clk-pll.c
+++ b/drivers/clk/mediatek/clk-pll.c
@@ -144,9 +144,9 @@ static void mtk_pll_calc_values(struct mtk_clk_pll *pll, u32 *pcw, u32 *postdiv,
if (freq > pll->data->fmax)
freq = pll->data->fmax;
- for (val = 0; val < 4; val++) {
+ for (val = 0; val < 5; val++) {
*postdiv = 1 << val;
- if (freq * *postdiv >= fmin)
+ if ((u64)freq * *postdiv >= fmin)
break;
}
--
2.30.9