1 files changed, 42 insertions, 17 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index d2a54eb0efd9..fa2d3fba6ac9 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -814,7 +814,7 @@ struct regmap *__regmap_init(struct device *dev,
 
 	map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8);
 	map->format.pad_bytes = config->pad_bits / 8;
-	map->format.reg_downshift = config->reg_downshift;
+	map->format.reg_shift = config->reg_shift;
 	map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8);
 	map->format.buf_size = DIV_ROUND_UP(config->reg_bits +
 			config->val_bits + config->pad_bits, 8);
@@ -1676,6 +1676,18 @@ static void regmap_set_work_buf_flag_mask(struct regmap *map, int max_bytes,
 		buf[i] |= (mask >> (8 * i)) & 0xff;
 }
 
+static unsigned int regmap_reg_addr(struct regmap *map, unsigned int reg)
+{
+	reg += map->reg_base;
+
+	if (map->format.reg_shift > 0)
+		reg >>= map->format.reg_shift;
+	else if (map->format.reg_shift < 0)
+		reg <<= -(map->format.reg_shift);
+
+	return reg;
+}
+
 static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
 				  const void *val, size_t val_len, bool noinc)
 {
@@ -1753,8 +1765,7 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
 			return ret;
 	}
 
-	reg += map->reg_base;
-	reg >>= map->format.reg_downshift;
+	reg = regmap_reg_addr(map, reg);
 	map->format.format_reg(map->work_buf, reg, map->reg_shift);
 	regmap_set_work_buf_flag_mask(map, map->format.reg_bytes,
 				      map->write_flag_mask);
@@ -1924,8 +1935,7 @@ static int _regmap_bus_formatted_write(void *context, unsigned int reg,
 			return ret;
 	}
 
-	reg += map->reg_base;
-	reg >>= map->format.reg_downshift;
+	reg = regmap_reg_addr(map, reg);
 	map->format.format_write(map, reg, val);
 
 	trace_regmap_hw_write_start(map, reg, 1);
@@ -1941,9 +1951,17 @@ static int _regmap_bus_reg_write(void *context, unsigned int reg,
 				 unsigned int val)
 {
 	struct regmap *map = context;
+	struct regmap_range_node *range;
+	int ret;
 
-	reg += map->reg_base;
-	reg >>= map->format.reg_downshift;
+	range = _regmap_range_lookup(map, reg);
+	if (range) {
+		ret = _regmap_select_page(map, &reg, range, 1);
+		if (ret != 0)
+			return ret;
+	}
+
+	reg = regmap_reg_addr(map, reg);
 	return map->bus->reg_write(map->bus_context, reg, val);
 }
 
@@ -2064,6 +2082,8 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
 	size_t val_count = val_len / val_bytes;
 	size_t chunk_count, chunk_bytes;
 	size_t chunk_regs = val_count;
+	size_t max_data = map->max_raw_write - map->format.reg_bytes -
+			map->format.pad_bytes;
 	int ret, i;
 
 	if (!val_count)
@@ -2071,8 +2091,8 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
 
 	if (map->use_single_write)
 		chunk_regs = 1;
-	else if (map->max_raw_write && val_len > map->max_raw_write)
-		chunk_regs = map->max_raw_write / val_bytes;
+	else if (map->max_raw_write && val_len > max_data)
+		chunk_regs = max_data / val_bytes;
 
 	chunk_count = val_count / chunk_regs;
 	chunk_bytes = chunk_regs * val_bytes;
@@ -2494,8 +2514,7 @@ static int _regmap_raw_multi_reg_write(struct regmap *map,
 		unsigned int reg = regs[i].reg;
 		unsigned int val = regs[i].def;
 		trace_regmap_hw_write_start(map, reg, 1);
-		reg += map->reg_base;
-		reg >>= map->format.reg_downshift;
+		reg = regmap_reg_addr(map, reg);
 		map->format.format_reg(u8, reg, map->reg_shift);
 		u8 += reg_bytes + pad_bytes;
 		map->format.format_val(u8, val, 0);
@@ -2821,8 +2840,7 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
 			return ret;
 	}
 
-	reg += map->reg_base;
-	reg >>= map->format.reg_downshift;
+	reg = regmap_reg_addr(map, reg);
 	map->format.format_reg(map->work_buf, reg, map->reg_shift);
 	regmap_set_work_buf_flag_mask(map, map->format.reg_bytes,
 				      map->read_flag_mask);
@@ -2841,9 +2859,17 @@ static int _regmap_bus_reg_read(void *context, unsigned int reg,
 				unsigned int *val)
 {
 	struct regmap *map = context;
+	struct regmap_range_node *range;
+	int ret;
 
-	reg += map->reg_base;
-	reg >>= map->format.reg_downshift;
+	range = _regmap_range_lookup(map, reg);
+	if (range) {
+		ret = _regmap_select_page(map, &reg, range, 1);
+		if (ret != 0)
+			return ret;
+	}
+
+	reg = regmap_reg_addr(map, reg);
 	return map->bus->reg_read(map->bus_context, reg, val);
 }
 
@@ -3235,8 +3261,7 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
 		*change = false;
 
 	if (regmap_volatile(map, reg) && map->reg_update_bits) {
-		reg += map->reg_base;
-		reg >>= map->format.reg_downshift;
+		reg = regmap_reg_addr(map, reg);
 		ret = map->reg_update_bits(map->bus_context, reg, mask, val);
 		if (ret == 0 && change)
 			*change = true;