[PATCH 15/33] clk: vt8500: change vtwm_pll_round_rate() return logic

[Bryan O'Donoghue]

This patch updates the round_rate() logic here to return zero instead of a
negative number on error.

In conjunction with higher-level changes associated with acting on the
return value of clk_ops->round_rate() it is then possible to have
clk_ops->round_rate() return values from 1 Hz to ULONG_MAX Hz instead of
the current limitation of 1 Hz to LONG_MAX Hz.

Signed-off-by: Bryan O'Donoghue <pure.logic@xxxxxxxxxxxxxxxxx>
Cc: Michael Turquette <mturquette@xxxxxxxxxxxx>
Cc: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
Cc: linux-clk@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: Tony Prisk <linux@xxxxxxxxxxxxxxx>
---
 drivers/clk/clk-vt8500.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/clk-vt8500.c b/drivers/clk/clk-vt8500.c
index 43c88f6..750c087 100644
--- a/drivers/clk/clk-vt8500.c
+++ b/drivers/clk/clk-vt8500.c
@@ -610,7 +610,7 @@ static unsigned long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate,
 	struct clk_pll *pll = to_clk_pll(hw);
 	u32 filter, mul, div1, div2;
 	long round_rate;
-	int ret;
+	int ret = 1;
 
 	switch (pll->type) {
 	case PLL_TYPE_VT8500:
@@ -634,11 +634,11 @@ static unsigned long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate,
 			round_rate = WM8850_BITS_TO_FREQ(*prate, mul, div1, div2);
 		break;
 	default:
-		ret = -EINVAL;
+		break;
 	}
 
 	if (ret)
-		return ret;
+		return 0;
 
 	return round_rate;
 }
-- 
2.7.4