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Commit 4b020b3f authored by Mark Brown's avatar Mark Brown
Browse files

regmap: Provide debugfs read of register ranges 



If a register range is named then provide a debugfs file showing the
contents of the range separately.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent bd9cc12f

drivers/base/regmap/internal.h

+1 −0
Original line number Diff line number Diff line
@@ -121,6 +121,7 @@ int _regmap_write(struct regmap *map, unsigned int reg, 
struct regmap_range_node {

	struct rb_node node;

	const char *name;

	struct regmap *map;



	unsigned int range_min;

	unsigned int range_max;

drivers/base/regmap/regmap-debugfs.c

+31 −0
Original line number Diff line number Diff line
@@ -183,6 +183,22 @@ static const struct file_operations regmap_map_fops = { 
	.llseek = default_llseek,

};



static ssize_t regmap_range_read_file(struct file *file, char __user *user_buf,

				      size_t count, loff_t *ppos)

{

	struct regmap_range_node *range = file->private_data;

	struct regmap *map = range->map;



	return regmap_read_debugfs(map, range->range_min, range->range_max,

				   user_buf, count, ppos);

}



static const struct file_operations regmap_range_fops = {

	.open = simple_open,

	.read = regmap_range_read_file,

	.llseek = default_llseek,

};



static ssize_t regmap_access_read_file(struct file *file,

				       char __user *user_buf, size_t count,

				       loff_t *ppos)
@@ -253,6 +269,9 @@ static const struct file_operations regmap_access_fops = { 


void regmap_debugfs_init(struct regmap *map, const char *name)

{

	struct rb_node *next;

	struct regmap_range_node *range_node;



	if (name) {

		map->debugfs_name = kasprintf(GFP_KERNEL, "%s-%s",

					      dev_name(map->dev), name);
@@ -285,6 +304,18 @@ void regmap_debugfs_init(struct regmap *map, const char *name) 
		debugfs_create_bool("cache_bypass", 0400, map->debugfs,

				    &map->cache_bypass);

	}



	next = rb_first(&map->range_tree);

	while (next) {

		range_node = rb_entry(next, struct regmap_range_node, node);



		if (range_node->name)

			debugfs_create_file(range_node->name, 0400,

					    map->debugfs, range_node,

					    &regmap_range_fops);



		next = rb_next(&range_node->node);

	}

}



void regmap_debugfs_exit(struct regmap *map)

drivers/base/regmap/regmap.c

+1 −0
Original line number Diff line number Diff line
@@ -579,6 +579,7 @@ struct regmap *regmap_init(struct device *dev, 
			goto err_range;

		}



		new->map = map;

		new->name = range_cfg->name;

		new->range_min = range_cfg->range_min;

		new->range_max = range_cfg->range_max;