Merge branch 'for-linus' into for-next

1 files changed, 14 insertions, 15 deletions

diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index db7f8bce7467..25006a8bb8e6 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -144,12 +144,6 @@ static unsigned long clk_divider_recalc_rate(struct clk_hw *hw,
 				   divider->flags);
 }
 
-/*
- * The reverse of DIV_ROUND_UP: The maximum number which
- * divided by m is r
- */
-#define MULT_ROUND_UP(r, m) ((r) * (m) + (m) - 1)
-
 static bool _is_valid_table_div(const struct clk_div_table *table,
 							 unsigned int div)
 {
@@ -225,19 +219,24 @@ static int _div_round_closest(const struct clk_div_table *table,
 			      unsigned long parent_rate, unsigned long rate,
 			      unsigned long flags)
 {
-	int up, down, div;
+	int up, down;
+	unsigned long up_rate, down_rate;
 
-	up = down = div = DIV_ROUND_CLOSEST(parent_rate, rate);
+	up = DIV_ROUND_UP(parent_rate, rate);
+	down = parent_rate / rate;
 
 	if (flags & CLK_DIVIDER_POWER_OF_TWO) {
-		up = __roundup_pow_of_two(div);
-		down = __rounddown_pow_of_two(div);
+		up = __roundup_pow_of_two(up);
+		down = __rounddown_pow_of_two(down);
 	} else if (table) {
-		up = _round_up_table(table, div);
-		down = _round_down_table(table, div);
+		up = _round_up_table(table, up);
+		down = _round_down_table(table, down);
 	}
 
-	return (up - div) <= (div - down) ? up : down;
+	up_rate = DIV_ROUND_UP(parent_rate, up);
+	down_rate = DIV_ROUND_UP(parent_rate, down);
+
+	return (rate - up_rate) <= (down_rate - rate) ? up : down;
 }
 
 static int _div_round(const struct clk_div_table *table,
@@ -313,7 +312,7 @@ static int clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
 			return i;
 		}
 		parent_rate = __clk_round_rate(__clk_get_parent(hw->clk),
-				MULT_ROUND_UP(rate, i));
+					       rate * i);
 		now = DIV_ROUND_UP(parent_rate, i);
 		if (_is_best_div(rate, now, best, flags)) {
 			bestdiv = i;
@@ -353,7 +352,7 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
 		bestdiv = readl(divider->reg) >> divider->shift;
 		bestdiv &= div_mask(divider->width);
 		bestdiv = _get_div(divider->table, bestdiv, divider->flags);
-		return bestdiv;
+		return DIV_ROUND_UP(*prate, bestdiv);
 	}
 
 	return divider_round_rate(hw, rate, prate, divider->table,