If a clock has CLK_GET_RATE_NOCACHE flag set the rate needs to be recalculated, rather than referencing the cached value.
Currently cached clk->rate is compared with new value to see if anything needs to be done in clk_set_rate(). This may cause required clock controller registers update to not happen when same clock frequency value is being set subsequently. Signed-off-by: Sylwester Nawrocki <[email protected]> Signed-off-by: Kyungmin Park <[email protected]> --- drivers/clk/clk.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 1144e8c..ffa304e 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -1215,6 +1215,9 @@ int clk_set_rate(struct clk *clk, unsigned long rate) /* prevent racing with updates to the clock topology */ clk_prepare_lock(); + if (clk->flags & CLK_GET_RATE_NOCACHE) + __clk_recalc_rates(clk, 0); + /* bail early if nothing to do */ if (rate == clk->rate) goto out; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
