openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

clk: sunxi-ng: mux: Don't just rely on the parent for CLK_SET_RATE_PARENT 

The current code only rely on the parent to change its rate in the case
where CLK_SET_RATE_PARENT is set.

However, some clock rates might be obtained only through a modification of
the parent and the clock divider. Just rely on the round rate of the clocks
to give us the best computation that might be achieved for a given rate.

round_rate functions now need to honor CLK_SET_RATE_PARENT, but either the
functions already do that if they modify the parent, or don't modify the
praents at all.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
This commit is contained in:
Maxime Ripard 2017-05-17 09:40:33 +02:00
parent e69b2afa87
commit 73e3e04fc0
1 changed files with 1 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/clk/sunxi-ng/ccu_mux.c
View File

@ -95,19 +95,7 @@ int ccu_mux_helper_determine_rate(struct ccu_common *common,
if (!parent)
continue;
if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) {
struct clk_rate_request parent_req = *req;
int ret = __clk_determine_rate(parent, &parent_req);
if (ret)
continue;
parent_rate = parent_req.rate;
} else {
parent_rate = clk_hw_get_rate(parent);
}
adj_parent_rate = parent_rate;
adj_parent_rate = parent_rate = clk_hw_get_rate(parent);
ccu_mux_helper_adjust_parent_for_prediv(common, cm, i,
&adj_parent_rate);