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clk: imx: pfdv2: switch to use determine_rate 

Per clk_ops, compared with round_rate, determine_rate could optionally
support the parent clock that should be used to provide the clock rate.

In this patch, the parent clock is just parent->rate as round_rate.

The following patch will calculate the best parent clock.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Peng Fan 2020-02-19 15:59:47 +08:00 committed by Shawn Guo
parent 28b2f82e03
commit 8ffe9c7bb9
1 changed files with 9 additions and 6 deletions
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15
drivers/clk/imx/clk-pfdv2.c
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@ -98,10 +98,11 @@ static unsigned long clk_pfdv2_recalc_rate(struct clk_hw *hw,
return tmp;
}
static long clk_pfdv2_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
static int clk_pfdv2_determine_rate(struct clk_hw *hw,
struct clk_rate_request *req)
{
u64 tmp = *prate;
u64 tmp = req->best_parent_rate;
u64 rate = req->rate;
u8 frac;
tmp = tmp * 18 + rate / 2;
@ -113,11 +114,13 @@ static long clk_pfdv2_round_rate(struct clk_hw *hw, unsigned long rate,
else if (frac > 35)
frac = 35;
tmp = *prate;
tmp = req->best_parent_rate;
tmp *= 18;
do_div(tmp, frac);
return tmp;
req->rate = tmp;
return 0;
}
static int clk_pfdv2_is_enabled(struct clk_hw *hw)
@ -167,7 +170,7 @@ static const struct clk_ops clk_pfdv2_ops = {
.enable = clk_pfdv2_enable,
.disable = clk_pfdv2_disable,
.recalc_rate = clk_pfdv2_recalc_rate,
.round_rate = clk_pfdv2_round_rate,
.determine_rate = clk_pfdv2_determine_rate,
.set_rate = clk_pfdv2_set_rate,
.is_enabled = clk_pfdv2_is_enabled,
};