[PATCH] lp3971: Fix BUCK_VOL_CHANGE_SHIFT logic

[Axel Lin]

Given x=0,1,2, current implementation of BUCK_VOL_CHANGE_SHIFT(x) returns 0,4,8.
The correct return value should be 0,4,6.
This patch fix the logic.

Signed-off-by: Axel Lin <axel.lin@xxxxxxxxx>
---
 drivers/regulator/lp3971.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/regulator/lp3971.c b/drivers/regulator/lp3971.c
index a28ae37..1ba61ab 100644
--- a/drivers/regulator/lp3971.c
+++ b/drivers/regulator/lp3971.c
@@ -45,7 +45,7 @@ static int lp3971_set_bits(struct lp3971 *lp3971, u8
reg, u16 mask, u16 val);
        LP3971_BUCK2 -> 4
        LP3971_BUCK3 -> 6
 */
-#define BUCK_VOL_CHANGE_SHIFT(x) (((1 << x) & ~0x01) << 1)
+#define BUCK_VOL_CHANGE_SHIFT(x) (((!!x) << 2) | (x & ~0x01))
 #define BUCK_VOL_CHANGE_FLAG_GO 0x01
 #define BUCK_VOL_CHANGE_FLAG_TARGET 0x02
 #define BUCK_VOL_CHANGE_FLAG_MASK 0x03
-- 
1.5.4.3
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