The pre_pll divisor must be such that ext_clk / pre_pll divisor does not
result in a frequency that is greater than pll_ip_clk_freq. Fix this.
Signed-off-by: Sakari Ailus <sakari.ai...@maxwell.research.nokia.com>
---
drivers/media/video/smiapp-pll.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/media/video/smiapp-pll.c b/drivers/media/video/smiapp-pll.c
index a416e27..a2e41a2 100644
--- a/drivers/media/video/smiapp-pll.c
+++ b/drivers/media/video/smiapp-pll.c
@@ -124,8 +124,9 @@ int smiapp_pll_calculate(struct device *dev, struct
smiapp_pll_limits *limits,
limits->min_pll_ip_freq_hz));
limits->min_pre_pll_clk_div =
max_t(uint16_t, limits->min_pre_pll_clk_div,
- clk_div_even(pll->ext_clk_freq_hz /
- limits->max_pll_ip_freq_hz));
+ clk_div_even_up(
+ DIV_ROUND_UP(pll->ext_clk_freq_hz,
+ limits->max_pll_ip_freq_hz)));
dev_dbg(dev, "pre-pll check: min / max pre_pll_clk_div: %d / %d\n",
limits->min_pre_pll_clk_div, limits->max_pre_pll_clk_div);
--
1.7.2.5
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