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clk: qcom: Use parent rate when set rate to pixel RCG clock

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Since the parent rate has been recalculated, pixel RCG clock
should rely on it to find the correct M/N values during set_rate,
instead of calling __clk_round_rate() to its parent again.

Signed-off-by: Hai Li <hali@codeaurora.org>
Tested-by: Archit Taneja <architt@codeaurora.org>
Fixes: 99cbd064b0 ("clk: qcom: Support display RCG clocks")
[sboyd@codeaurora.org: Silenced unused parent variable warning]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Hai Li 2015-06-25 18:35:33 -04:00 committed by Stephen Boyd
parent c76a024e82
commit 6d451367bf
1 changed files with 3 additions and 6 deletions
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9
drivers/clk/qcom/clk-rcg2.c
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@ -530,19 +530,16 @@ static int clk_pixel_set_rate(struct clk_hw *hw, unsigned long rate,
struct clk_rcg2 *rcg = to_clk_rcg2(hw);
struct freq_tbl f = *rcg->freq_tbl;
const struct frac_entry *frac = frac_table_pixel;
unsigned long request, src_rate;
unsigned long request;
int delta = 100000;
u32 mask = BIT(rcg->hid_width) - 1;
u32 hid_div;
int index = qcom_find_src_index(hw, rcg->parent_map, f.src);
struct clk *parent = clk_get_parent_by_index(hw->clk, index);
for (; frac->num; frac++) {
request = (rate * frac->den) / frac->num;
src_rate = __clk_round_rate(parent, request);
if ((src_rate < (request - delta)) ||
(src_rate > (request + delta)))
if ((parent_rate < (request - delta)) ||
(parent_rate > (request + delta)))
continue;
regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,