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[media] smiapp: Round minimum pre_pll up rather than down in ip_clk_freq check

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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.ailus@maxwell.research.nokia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sakari Ailus 2012-04-26 11:21:30 -03:00 committed by Mauro Carvalho Chehab
parent 98add8e807
commit 6f36799398
1 changed files with 3 additions and 2 deletions
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5
drivers/media/video/smiapp-pll.c
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@ -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);