diff options
| author | Chen-Yu Tsai <wens@csie.org> | 2017-01-28 15:22:30 +0300 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@free-electrons.com> | 2017-01-30 10:35:37 +0300 |
| commit | ed48205fb4054bab68fe47648ba4b7ceb67fcc17 (patch) | |
| tree | f028fa3eb8d63132a4977ca6dd2e4203447bdbf7 | |
| parent | 64afa89ff60844f561a8934f40f0ed93e37b6a8b (diff) | |
| download | linux-ed48205fb4054bab68fe47648ba4b7ceb67fcc17.tar.xz | |
clk: sunxi-ng: mux: Fix determine_rate for mux clocks with pre-dividers
The determine_rate helper used ccu_mux_helper_adjust_parent_for_prediv()
to adjust the parent_rate to account for pre-dividers, but then passed
the pristine parent clock rate from clk_hw_get_rate() to the round()
callback, thereby ignoring the pre-divider adjustment. In addition,
it was saving the adjusted parent rate back into struct
clk_rate_request.
This patch fixes this by saving the pristine parent clock rate, and
adding a copy that is adjusted and passed to the round() callback.
The pristine copy, if it is the best solution, would be saved back
to struct clk_rate_request.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
| -rw-r--r-- | drivers/clk/sunxi-ng/ccu_mux.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/clk/sunxi-ng/ccu_mux.c b/drivers/clk/sunxi-ng/ccu_mux.c index 858a48621631..eb66adb28807 100644 --- a/drivers/clk/sunxi-ng/ccu_mux.c +++ b/drivers/clk/sunxi-ng/ccu_mux.c @@ -71,7 +71,7 @@ int ccu_mux_helper_determine_rate(struct ccu_common *common, unsigned int i; for (i = 0; i < clk_hw_get_num_parents(hw); i++) { - unsigned long tmp_rate, parent_rate; + unsigned long tmp_rate, parent_rate, adj_parent_rate; struct clk_hw *parent; parent = clk_hw_get_parent_by_index(hw, i); @@ -79,10 +79,11 @@ int ccu_mux_helper_determine_rate(struct ccu_common *common, continue; parent_rate = clk_hw_get_rate(parent); + adj_parent_rate = parent_rate; ccu_mux_helper_adjust_parent_for_prediv(common, cm, i, - &parent_rate); + &adj_parent_rate); - tmp_rate = round(cm, clk_hw_get_rate(parent), req->rate, data); + tmp_rate = round(cm, adj_parent_rate, req->rate, data); if (tmp_rate == req->rate) { best_parent = parent; best_parent_rate = parent_rate; |