Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f8bd822c authored by Mark Brown's avatar Mark Brown
Browse files

regmap: cache: Factor out block sync 



The idea of holding blocks of registers in device format is shared between
at least rbtree and lzo cache formats so split out the loop that does the
sync from the rbtree code so optimisations on it can be reused.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: default avatarDimitris Papastamos <dp@opensource.wolfsonmicro.com>
parent 78493f2d

drivers/base/regmap/internal.h

+3 −0
Original line number Diff line number Diff line
@@ -191,6 +191,9 @@ int regcache_read(struct regmap *map, 
int regcache_write(struct regmap *map,

			unsigned int reg, unsigned int value);

int regcache_sync(struct regmap *map);

int regcache_sync_block(struct regmap *map, void *block,

			unsigned int block_base, unsigned int start,

			unsigned int end);



static inline const void *regcache_get_val_addr(struct regmap *map,

						const void *base,

drivers/base/regmap/regcache-rbtree.c

+6 −42
Original line number Diff line number Diff line
@@ -53,12 +53,6 @@ static unsigned int regcache_rbtree_get_register(struct regmap *map, 
	return regcache_get_val(map, rbnode->block, idx);

}



static const void *regcache_rbtree_get_reg_addr(struct regmap *map,

	struct regcache_rbtree_node *rbnode, unsigned int idx)

{

	return regcache_get_val_addr(map, rbnode->block, idx);

}



static void regcache_rbtree_set_register(struct regmap *map,

					 struct regcache_rbtree_node *rbnode,

					 unsigned int idx, unsigned int val)
@@ -390,11 +384,8 @@ static int regcache_rbtree_sync(struct regmap *map, unsigned int min, 
	struct regcache_rbtree_ctx *rbtree_ctx;

	struct rb_node *node;

	struct regcache_rbtree_node *rbnode;

	unsigned int regtmp;

	unsigned int val;

	const void *addr;

	int ret;

	int i, base, end;

	int base, end;



	rbtree_ctx = map->cache;

	for (node = rb_first(&rbtree_ctx->root); node; node = rb_next(node)) {
@@ -417,40 +408,13 @@ static int regcache_rbtree_sync(struct regmap *map, unsigned int min, 
		else

			end = rbnode->blklen;



		for (i = base; i < end; i++) {

			regtmp = rbnode->base_reg + (i * map->reg_stride);



			if (!regcache_reg_present(map, regtmp))

				continue;



			val = regcache_rbtree_get_register(map, rbnode, i);



			/* Is this the hardware default?  If so skip. */

			ret = regcache_lookup_reg(map, regtmp);

			if (ret >= 0 && val == map->reg_defaults[ret].def)

				continue;



			map->cache_bypass = 1;



			if (regmap_can_raw_write(map)) {

				addr = regcache_rbtree_get_reg_addr(map,

								    rbnode, i);

				ret = _regmap_raw_write(map, regtmp, addr,

							map->format.val_bytes,

							false);

			} else {

				ret = _regmap_write(map, regtmp, val);

			}



			map->cache_bypass = 0;

			if (ret)

		ret = regcache_sync_block(map, rbnode->block, rbnode->base_reg,

					  base, end);

		if (ret != 0)

			return ret;

			dev_dbg(map->dev, "Synced register %#x, value %#x\n",

				regtmp, val);

		}

	}



	return 0;

	return regmap_async_complete(map);

}



struct regcache_ops regcache_rbtree_ops = {

drivers/base/regmap/regcache.c

+42 −0
Original line number Diff line number Diff line
@@ -544,3 +544,45 @@ int regcache_lookup_reg(struct regmap *map, unsigned int reg) 
	else

		return -ENOENT;

}



int regcache_sync_block(struct regmap *map, void *block,

			unsigned int block_base, unsigned int start,

			unsigned int end)

{

	unsigned int i, regtmp, val;

	const void *addr;

	int ret;



	for (i = start; i < end; i++) {

		regtmp = block_base + (i * map->reg_stride);



		if (!regcache_reg_present(map, regtmp))

			continue;



		val = regcache_get_val(map, block, i);



		/* Is this the hardware default?  If so skip. */

		ret = regcache_lookup_reg(map, regtmp);

		if (ret >= 0 && val == map->reg_defaults[ret].def)

			continue;



		map->cache_bypass = 1;



		if (regmap_can_raw_write(map)) {

			addr = regcache_get_val_addr(map, block, i);

			ret = _regmap_raw_write(map, regtmp, addr,

						map->format.val_bytes,

						false);

		} else {

			ret = _regmap_write(map, regtmp, val);

		}



		map->cache_bypass = 0;

		if (ret != 0)

			return ret;

		dev_dbg(map->dev, "Synced register %#x, value %#x\n",

			regtmp, val);

	}



	return 0;

}