diff mbox

[05/10] smiapp: Round minimum pre_pll up rather than down in ip_clk_freq check

Message ID 1337272209-31061-5-git-send-email-sakari.ailus@maxwell.research.nokia.com (mailing list archive)
State Accepted, archived
Headers

Commit Message

Sakari Ailus May 17, 2012, 4:30 p.m. UTC 
  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>
---
 drivers/media/video/smiapp-pll.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
diff mbox

Patch

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);