diff options
| author | Nicholas Mc Guire <hofrat@osadl.org> | 2016-12-12 08:40:09 +0100 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2017-01-09 16:06:41 -0800 |
| commit | ed784c532a3d0959db488f40a96c5127f63d42dc (patch) | |
| tree | ad2bc1ac6daaee970f48d998a8e0b0df58a3b5e6 /drivers/clk/clk-wm831x.c | |
| parent | c77cbdd11b688fa0d1fbb140473dad4bc47cf5e6 (diff) | |
| download | lwn-ed784c532a3d0959db488f40a96c5127f63d42dc.tar.gz lwn-ed784c532a3d0959db488f40a96c5127f63d42dc.zip | |
clk: wm831x: fix usleep_range with bad range
The delay here is not in atomic context and does not seem critical with
respect to precision, but usleep_range(min,max) with min==max results in
giving the timer subsystem no room to optimize uncritical delays. Fix
this by setting the range to 2000,3000 us.
Fixes: commit f05259a6ffa4 ("clk: wm831x: Add initial WM831x clock driver")
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/clk-wm831x.c')
| -rw-r--r-- | drivers/clk/clk-wm831x.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/clk/clk-wm831x.c b/drivers/clk/clk-wm831x.c index 0621fbfb4beb..a47960aacfa5 100644 --- a/drivers/clk/clk-wm831x.c +++ b/drivers/clk/clk-wm831x.c @@ -97,7 +97,8 @@ static int wm831x_fll_prepare(struct clk_hw *hw) if (ret != 0) dev_crit(wm831x->dev, "Failed to enable FLL: %d\n", ret); - usleep_range(2000, 2000); + /* wait 2-3 ms for new frequency taking effect */ + usleep_range(2000, 3000); return ret; } |