mfd: tps65090: set regmap config reg counts properly

["Maciej S. Szmigiero" <mail@maciej.szmigiero.name>]

Regmap config max_register field should contain number of
device last register, however num_reg_defaults_raw field
should be set to register count instead
(usually one register more than max_register).

tps65090 driver had both of these fields set to the same value,
fix this by introducing separate defines for max register
number and total count of registers.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
---
 drivers/mfd/tps65090.c       | 5 ++---
 include/linux/mfd/tps65090.h | 5 +++++
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/tps65090.c b/drivers/mfd/tps65090.c
index f88085ad9772..d7ec318c40c3 100644
--- a/drivers/mfd/tps65090.c
+++ b/drivers/mfd/tps65090.c
@@ -30,7 +30,6 @@
 #include <linux/err.h>
 
 #define NUM_INT_REG 2
-#define TOTAL_NUM_REG 0x18
 
 #define TPS65090_INT1_MASK_VAC_STATUS_CHANGE		1
 #define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE		2
@@ -161,8 +160,8 @@ static bool is_volatile_reg(struct device *dev, unsigned int reg)
 static const struct regmap_config tps65090_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
-	.max_register = TOTAL_NUM_REG,
-	.num_reg_defaults_raw = TOTAL_NUM_REG,
+	.max_register = TPS65090_MAX_REG,
+	.num_reg_defaults_raw = TPS65090_NUM_REGS,
 	.cache_type = REGCACHE_RBTREE,
 	.volatile_reg = is_volatile_reg,
 };
diff --git a/include/linux/mfd/tps65090.h b/include/linux/mfd/tps65090.h
index 0bf2708df150..67d144b3b8f9 100644
--- a/include/linux/mfd/tps65090.h
+++ b/include/linux/mfd/tps65090.h
@@ -77,6 +77,11 @@ enum {
 #define TPS65090_REG_CG_CTRL5	0x09
 #define TPS65090_REG_CG_STATUS1	0x0a
 #define TPS65090_REG_CG_STATUS2	0x0b
+#define TPS65090_REG_AD_OUT1	0x17
+#define TPS65090_REG_AD_OUT2	0x18
+
+#define TPS65090_MAX_REG	TPS65090_REG_AD_OUT2
+#define TPS65090_NUM_REGS	(TPS65090_MAX_REG + 1)
 
 struct tps65090 {
 	struct device		*dev;