[PATCH 28/33] clk: zte: change zx_audio_round_rate() return logic

From: Bryan O'Donoghue
Date: Fri Dec 29 2017 - 20:15:26 EST


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: Jun Nie <jun.nie@xxxxxxxxxx>
Cc: Baoyou Xie <baoyou.xie@xxxxxxxxxx>
Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
Cc: Michael Turquette <mturquette@xxxxxxxxxxxx>
Cc: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-clk@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
drivers/clk/zte/clk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/zte/clk.c b/drivers/clk/zte/clk.c
index df91842..6afdc4a 100644
--- a/drivers/clk/zte/clk.c
+++ b/drivers/clk/zte/clk.c
@@ -247,7 +247,7 @@ static unsigned long zx_audio_round_rate(struct clk_hw *hw, unsigned long rate,
u32 reg;

if (rate * 2 > *prate)
- return -EINVAL;
+ return 0;

reg = calc_reg(*prate, rate);
return calc_rate(reg, *prate);
--
2.7.4