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| author | Emilio López <emilio@elopez.com.ar> | 2014-03-19 15:19:32 -0300 |
|---|---|---|
| committer | Mike Turquette <mturquette@linaro.org> | 2014-03-19 12:34:56 -0700 |
| commit | 2226013972da1ec0a2aeb13a684180bb2b50e0f3 (patch) | |
| tree | 46eb6fa45466430ff9995979607226d4c18f2e87 /drivers/clk | |
| parent | 5a8ddf26822dcf601a44d35efa8fe162cbc84e62 (diff) | |
| download | linux-2226013972da1ec0a2aeb13a684180bb2b50e0f3.tar.gz linux-2226013972da1ec0a2aeb13a684180bb2b50e0f3.tar.bz2 linux-2226013972da1ec0a2aeb13a684180bb2b50e0f3.zip | |
clk: sunxi: fix some calculations
Some divisor calculations were misrounded, causing higher than requested
rates on some clocks. Fix them up using DIV_ROUND_UP, and replace one
homebrew instance of it as well with the right macro.
Reported-by: Boris BREZILLON <b.brezillon.dev@gmail.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/sunxi/clk-sunxi.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c index ef6ad52b7546..aaec9d7867d0 100644 --- a/drivers/clk/sunxi/clk-sunxi.c +++ b/drivers/clk/sunxi/clk-sunxi.c @@ -299,7 +299,7 @@ static void sun4i_get_apb1_factors(u32 *freq, u32 parent_rate, if (parent_rate < *freq) *freq = parent_rate; - parent_rate = (parent_rate + (*freq - 1)) / *freq; + parent_rate = DIV_ROUND_UP(parent_rate, *freq); /* Invalid rate! */ if (parent_rate > 32) @@ -344,7 +344,7 @@ static void sun4i_get_mod0_factors(u32 *freq, u32 parent_rate, if (*freq > parent_rate) *freq = parent_rate; - div = parent_rate / *freq; + div = DIV_ROUND_UP(parent_rate, *freq); if (div < 16) calcp = 0; @@ -385,7 +385,7 @@ static void sun7i_a20_get_out_factors(u32 *freq, u32 parent_rate, if (*freq > parent_rate) *freq = parent_rate; - div = parent_rate / *freq; + div = DIV_ROUND_UP(parent_rate, *freq); if (div < 32) calcp = 0; |