From: Peng Fan <[email protected]>
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 <[email protected]>
---
drivers/clk/imx/clk-pfdv2.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/clk/imx/clk-pfdv2.c b/drivers/clk/imx/clk-pfdv2.c
index f8707278aad9..28b5f208ced9 100644
--- a/drivers/clk/imx/clk-pfdv2.c
+++ b/drivers/clk/imx/clk-pfdv2.c
@@ -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,
};
--
2.16.4