Linux-libre 4.6.2-gnu

1 files changed, 57 insertions, 184 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index ee54e841d..df2d2ef5d 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -19,6 +19,7 @@
 #include <linux/rbtree.h>
 #include <linux/sched.h>
 #include <linux/delay.h>
+#include <linux/log2.h>
 
 #define CREATE_TRACE_POINTS
 #include "trace.h"
@@ -557,6 +558,8 @@ enum regmap_endian regmap_get_val_endian(struct device *dev,
 			endian = REGMAP_ENDIAN_BIG;
 		else if (of_property_read_bool(np, "little-endian"))
 			endian = REGMAP_ENDIAN_LITTLE;
+		else if (of_property_read_bool(np, "native-endian"))
+			endian = REGMAP_ENDIAN_NATIVE;
 
 		/* If the endianness was specified in DT, use that */
 		if (endian != REGMAP_ENDIAN_DEFAULT)
@@ -638,6 +641,10 @@ struct regmap *__regmap_init(struct device *dev,
 		map->reg_stride = config->reg_stride;
 	else
 		map->reg_stride = 1;
+	if (is_power_of_2(map->reg_stride))
+		map->reg_stride_order = ilog2(map->reg_stride);
+	else
+		map->reg_stride_order = -1;
 	map->use_single_read = config->use_single_rw || !bus || !bus->read;
 	map->use_single_write = config->use_single_rw || !bus || !bus->write;
 	map->can_multi_write = config->can_multi_write && bus && bus->write;
@@ -1308,7 +1315,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
 	if (map->writeable_reg)
 		for (i = 0; i < val_len / map->format.val_bytes; i++)
 			if (!map->writeable_reg(map->dev,
-						reg + (i * map->reg_stride)))
+					       reg + regmap_get_offset(map, i)))
 				return -EINVAL;
 
 	if (!map->cache_bypass && map->format.parse_val) {
@@ -1316,7 +1323,8 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
 		int val_bytes = map->format.val_bytes;
 		for (i = 0; i < val_len / val_bytes; i++) {
 			ival = map->format.parse_val(val + (i * val_bytes));
-			ret = regcache_write(map, reg + (i * map->reg_stride),
+			ret = regcache_write(map,
+					     reg + regmap_get_offset(map, i),
 					     ival);
 			if (ret) {
 				dev_err(map->dev,
@@ -1690,100 +1698,63 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
 EXPORT_SYMBOL_GPL(regmap_raw_write);
 
 /**
- * regmap_field_write(): Write a value to a single register field
- *
- * @field: Register field to write to
- * @val: Value to be written
- *
- * A value of zero will be returned on success, a negative errno will
- * be returned in error cases.
- */
-int regmap_field_write(struct regmap_field *field, unsigned int val)
-{
-	return regmap_update_bits(field->regmap, field->reg,
-				field->mask, val << field->shift);
-}
-EXPORT_SYMBOL_GPL(regmap_field_write);
-
-/**
- * regmap_field_update_bits():	Perform a read/modify/write cycle
- *                              on the register field
+ * regmap_field_update_bits_base():
+ *	Perform a read/modify/write cycle on the register field
+ *	with change, async, force option
  *
  * @field: Register field to write to
  * @mask: Bitmask to change
  * @val: Value to be written
+ * @change: Boolean indicating if a write was done
+ * @async: Boolean indicating asynchronously
+ * @force: Boolean indicating use force update
  *
  * A value of zero will be returned on success, a negative errno will
  * be returned in error cases.
  */
-int regmap_field_update_bits(struct regmap_field *field, unsigned int mask, unsigned int val)
+int regmap_field_update_bits_base(struct regmap_field *field,
+				  unsigned int mask, unsigned int val,
+				  bool *change, bool async, bool force)
 {
 	mask = (mask << field->shift) & field->mask;
 
-	return regmap_update_bits(field->regmap, field->reg,
-				  mask, val << field->shift);
+	return regmap_update_bits_base(field->regmap, field->reg,
+				       mask, val << field->shift,
+				       change, async, force);
 }
-EXPORT_SYMBOL_GPL(regmap_field_update_bits);
+EXPORT_SYMBOL_GPL(regmap_field_update_bits_base);
 
 /**
- * regmap_fields_write(): Write a value to a single register field with port ID
- *
- * @field: Register field to write to
- * @id: port ID
- * @val: Value to be written
- *
- * A value of zero will be returned on success, a negative errno will
- * be returned in error cases.
- */
-int regmap_fields_write(struct regmap_field *field, unsigned int id,
-			unsigned int val)
-{
-	if (id >= field->id_size)
-		return -EINVAL;
-
-	return regmap_update_bits(field->regmap,
-				  field->reg + (field->id_offset * id),
-				  field->mask, val << field->shift);
-}
-EXPORT_SYMBOL_GPL(regmap_fields_write);
-
-int regmap_fields_force_write(struct regmap_field *field, unsigned int id,
-			unsigned int val)
-{
-	if (id >= field->id_size)
-		return -EINVAL;
-
-	return regmap_write_bits(field->regmap,
-				  field->reg + (field->id_offset * id),
-				  field->mask, val << field->shift);
-}
-EXPORT_SYMBOL_GPL(regmap_fields_force_write);
-
-/**
- * regmap_fields_update_bits():	Perform a read/modify/write cycle
- *                              on the register field
+ * regmap_fields_update_bits_base():
+ *	Perform a read/modify/write cycle on the register field
+ *	with change, async, force option
  *
  * @field: Register field to write to
  * @id: port ID
  * @mask: Bitmask to change
  * @val: Value to be written
+ * @change: Boolean indicating if a write was done
+ * @async: Boolean indicating asynchronously
+ * @force: Boolean indicating use force update
  *
  * A value of zero will be returned on success, a negative errno will
  * be returned in error cases.
  */
-int regmap_fields_update_bits(struct regmap_field *field,  unsigned int id,
-			      unsigned int mask, unsigned int val)
+int regmap_fields_update_bits_base(struct regmap_field *field,  unsigned int id,
+				   unsigned int mask, unsigned int val,
+				   bool *change, bool async, bool force)
 {
 	if (id >= field->id_size)
 		return -EINVAL;
 
 	mask = (mask << field->shift) & field->mask;
 
-	return regmap_update_bits(field->regmap,
-				  field->reg + (field->id_offset * id),
-				  mask, val << field->shift);
+	return regmap_update_bits_base(field->regmap,
+				       field->reg + (field->id_offset * id),
+				       mask, val << field->shift,
+				       change, async, force);
 }
-EXPORT_SYMBOL_GPL(regmap_fields_update_bits);
+EXPORT_SYMBOL_GPL(regmap_fields_update_bits_base);
 
 /*
  * regmap_bulk_write(): Write multiple registers to the device
@@ -1846,8 +1817,9 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
 				goto out;
 			}
 
-			ret = _regmap_write(map, reg + (i * map->reg_stride),
-					ival);
+			ret = _regmap_write(map,
+					    reg + regmap_get_offset(map, i),
+					    ival);
 			if (ret != 0)
 				goto out;
 		}
@@ -2253,6 +2225,9 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
 
 	WARN_ON(!map->bus);
 
+	if (!map->bus || !map->bus->read)
+		return -EINVAL;
+
 	range = _regmap_range_lookup(map, reg);
 	if (range) {
 		ret = _regmap_select_page(map, &reg, range,
@@ -2416,7 +2391,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
 		 * cost as we expect to hit the cache.
 		 */
 		for (i = 0; i < val_count; i++) {
-			ret = _regmap_read(map, reg + (i * map->reg_stride),
+			ret = _regmap_read(map, reg + regmap_get_offset(map, i),
 					   &v);
 			if (ret != 0)
 				goto out;
@@ -2568,7 +2543,7 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
 	} else {
 		for (i = 0; i < val_count; i++) {
 			unsigned int ival;
-			ret = regmap_read(map, reg + (i * map->reg_stride),
+			ret = regmap_read(map, reg + regmap_get_offset(map, i),
 					  &ival);
 			if (ret != 0)
 				return ret;
@@ -2648,138 +2623,36 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
 }
 
 /**
- * regmap_update_bits: Perform a read/modify/write cycle on the register map
- *
- * @map: Register map to update
- * @reg: Register to update
- * @mask: Bitmask to change
- * @val: New value for bitmask
- *
- * Returns zero for success, a negative number on error.
- */
-int regmap_update_bits(struct regmap *map, unsigned int reg,
-		       unsigned int mask, unsigned int val)
-{
-	int ret;
-
-	map->lock(map->lock_arg);
-	ret = _regmap_update_bits(map, reg, mask, val, NULL, false);
-	map->unlock(map->lock_arg);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(regmap_update_bits);
-
-/**
- * regmap_write_bits: Perform a read/modify/write cycle on the register map
- *
- * @map: Register map to update
- * @reg: Register to update
- * @mask: Bitmask to change
- * @val: New value for bitmask
- *
- * Returns zero for success, a negative number on error.
- */
-int regmap_write_bits(struct regmap *map, unsigned int reg,
-		      unsigned int mask, unsigned int val)
-{
-	int ret;
-
-	map->lock(map->lock_arg);
-	ret = _regmap_update_bits(map, reg, mask, val, NULL, true);
-	map->unlock(map->lock_arg);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(regmap_write_bits);
-
-/**
- * regmap_update_bits_async: Perform a read/modify/write cycle on the register
- *                           map asynchronously
- *
- * @map: Register map to update
- * @reg: Register to update
- * @mask: Bitmask to change
- * @val: New value for bitmask
- *
- * With most buses the read must be done synchronously so this is most
- * useful for devices with a cache which do not need to interact with
- * the hardware to determine the current register value.
- *
- * Returns zero for success, a negative number on error.
- */
-int regmap_update_bits_async(struct regmap *map, unsigned int reg,
-			     unsigned int mask, unsigned int val)
-{
-	int ret;
-
-	map->lock(map->lock_arg);
-
-	map->async = true;
-
-	ret = _regmap_update_bits(map, reg, mask, val, NULL, false);
-
-	map->async = false;
-
-	map->unlock(map->lock_arg);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(regmap_update_bits_async);
-
-/**
- * regmap_update_bits_check: Perform a read/modify/write cycle on the
- *                           register map and report if updated
- *
- * @map: Register map to update
- * @reg: Register to update
- * @mask: Bitmask to change
- * @val: New value for bitmask
- * @change: Boolean indicating if a write was done
- *
- * Returns zero for success, a negative number on error.
- */
-int regmap_update_bits_check(struct regmap *map, unsigned int reg,
-			     unsigned int mask, unsigned int val,
-			     bool *change)
-{
-	int ret;
-
-	map->lock(map->lock_arg);
-	ret = _regmap_update_bits(map, reg, mask, val, change, false);
-	map->unlock(map->lock_arg);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(regmap_update_bits_check);
-
-/**
- * regmap_update_bits_check_async: Perform a read/modify/write cycle on the
- *                                 register map asynchronously and report if
- *                                 updated
+ * regmap_update_bits_base:
+ *	Perform a read/modify/write cycle on the
+ *	register map with change, async, force option
  *
  * @map: Register map to update
  * @reg: Register to update
  * @mask: Bitmask to change
  * @val: New value for bitmask
  * @change: Boolean indicating if a write was done
+ * @async: Boolean indicating asynchronously
+ * @force: Boolean indicating use force update
  *
+ * if async was true,
  * With most buses the read must be done synchronously so this is most
  * useful for devices with a cache which do not need to interact with
  * the hardware to determine the current register value.
  *
  * Returns zero for success, a negative number on error.
  */
-int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
-				   unsigned int mask, unsigned int val,
-				   bool *change)
+int regmap_update_bits_base(struct regmap *map, unsigned int reg,
+			    unsigned int mask, unsigned int val,
+			    bool *change, bool async, bool force)
 {
 	int ret;
 
 	map->lock(map->lock_arg);
 
-	map->async = true;
+	map->async = async;
 
-	ret = _regmap_update_bits(map, reg, mask, val, change, false);
+	ret = _regmap_update_bits(map, reg, mask, val, change, force);
 
 	map->async = false;
 
@@ -2787,7 +2660,7 @@ int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(regmap_update_bits_check_async);
+EXPORT_SYMBOL_GPL(regmap_update_bits_base);
 
 void regmap_async_complete_cb(struct regmap_async *async, int ret)
 {