[PATCH v3 31/34] clk: at91: change 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: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
Cc: Michael Turquette <mturquette@xxxxxxxxxxxx>
Cc: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
Cc: Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxx>
Cc: linux-clk@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 drivers/clk/at91/clk-audio-pll.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/at91/clk-audio-pll.c b/drivers/clk/at91/clk-audio-pll.c
index 56227cb..48231e3 100644
--- a/drivers/clk/at91/clk-audio-pll.c
+++ b/drivers/clk/at91/clk-audio-pll.c
@@ -278,7 +278,7 @@ static unsigned long clk_audio_pll_pad_round_rate(struct clk_hw *hw,
 						  unsigned long *parent_rate)
 {
 	struct clk_hw *pclk = clk_hw_get_parent(hw);
-	long best_rate = -EINVAL;
+	unsigned long best_rate = 0;
 	unsigned long best_parent_rate;
 	unsigned long tmp_qd;
 	u32 div;
@@ -330,7 +330,7 @@ static unsigned long clk_audio_pll_pmc_round_rate(struct clk_hw *hw,
 						  unsigned long *parent_rate)
 {
 	struct clk_hw *pclk = clk_hw_get_parent(hw);
-	long best_rate = -EINVAL;
+	unsigned long best_rate = 0;
 	unsigned long best_parent_rate = 0;
 	u32 tmp_qd = 0, div;
 	long tmp_rate;
-- 
2.7.4