[PATCH 20/27] clk: stm32: stm32-core: convert from divider_round_rate_parent() to divider_determine_rate()

[Brian Masney]

The divider_round_rate_parent() function is now deprecated, so let's
migrate to divider_determine_rate() instead so that this deprecated API
can be removed.

Note that when the main function itself was migrated to use
determine_rate, this was mistakenly converted to:

    req->rate = divider_round_rate(...)

This is invalid in the case when an error occurs since it can set the
rate to a negative value.

Fixes: cd1cb38836c0 ("clk: stm32: stm32-core: convert from round_rate() to determine_rate()")
Signed-off-by: Brian Masney <bmasney@xxxxxxxxxx>

---
To: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
To: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
Cc: linux-stm32@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
---
 drivers/clk/stm32/clk-stm32-core.c | 20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

diff --git a/drivers/clk/stm32/clk-stm32-core.c b/drivers/clk/stm32/clk-stm32-core.c
index b95b9c591fda7d900d523f50c8bd449398aba49f..e921c25a929c303a2e189bf876667178a123eae1 100644
--- a/drivers/clk/stm32/clk-stm32-core.c
+++ b/drivers/clk/stm32/clk-stm32-core.c
@@ -375,13 +375,8 @@ static int clk_stm32_divider_determine_rate(struct clk_hw *hw,
 						 divider->flags, val);
 	}
 
-	req->rate = divider_round_rate_parent(hw, clk_hw_get_parent(hw),
-					      req->rate,
-					      &req->best_parent_rate,
-					      divider->table,
-					      divider->width, divider->flags);
-
-	return 0;
+	return divider_determine_rate(hw, req, divider->table, divider->width,
+				      divider->flags);
 }
 
 static unsigned long clk_stm32_divider_recalc_rate(struct clk_hw *hw,
@@ -438,7 +433,6 @@ static int clk_stm32_composite_determine_rate(struct clk_hw *hw,
 {
 	struct clk_stm32_composite *composite = to_clk_stm32_composite(hw);
 	const struct stm32_div_cfg *divider;
-	long rate;
 
 	if (composite->div_id == NO_STM32_DIV)
 		return 0;
@@ -457,14 +451,8 @@ static int clk_stm32_composite_determine_rate(struct clk_hw *hw,
 						 val);
 	}
 
-	rate = divider_round_rate_parent(hw, clk_hw_get_parent(hw),
-					 req->rate, &req->best_parent_rate,
-					 divider->table, divider->width, divider->flags);
-	if (rate < 0)
-		return rate;
-
-	req->rate = rate;
-	return 0;
+	return divider_determine_rate(hw, req, divider->table, divider->width,
+				      divider->flags);
 }
 
 static u8 clk_stm32_composite_get_parent(struct clk_hw *hw)

-- 
2.52.0