diff options
Diffstat (limited to 'drivers/base/regmap')
| -rw-r--r-- | drivers/base/regmap/regcache-rbtree.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c index e71320f61d1..7767cbb8d15 100644 --- a/drivers/base/regmap/regcache-rbtree.c +++ b/drivers/base/regmap/regcache-rbtree.c @@ -11,7 +11,9 @@ */ #include <linux/slab.h> +#include <linux/debugfs.h> #include <linux/rbtree.h> +#include <linux/seq_file.h> #include "internal.h" @@ -125,6 +127,51 @@ static int regcache_rbtree_insert(struct rb_root *root, return 1; } +#ifdef CONFIG_DEBUG_FS +static int rbtree_show(struct seq_file *s, void *ignored) +{ + struct regmap *map = s->private; + struct regcache_rbtree_ctx *rbtree_ctx = map->cache; + struct regcache_rbtree_node *n; + struct rb_node *node; + unsigned int base, top; + int nodes = 0; + int registers = 0; + + mutex_lock(&map->lock); + + for (node = rb_first(&rbtree_ctx->root); node != NULL; + node = rb_next(node)) { + n = container_of(node, struct regcache_rbtree_node, node); + + regcache_rbtree_get_base_top_reg(n, &base, &top); + seq_printf(s, "%x-%x (%d)\n", base, top, top - base + 1); + + nodes++; + registers += top - base + 1; + } + + seq_printf(s, "%d nodes, %d registers, average %d registers\n", + nodes, registers, registers / nodes); + + mutex_unlock(&map->lock); + + return 0; +} + +static int rbtree_open(struct inode *inode, struct file *file) +{ + return single_open(file, rbtree_show, inode->i_private); +} + +static const struct file_operations rbtree_fops = { + .open = rbtree_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; +#endif + static int regcache_rbtree_init(struct regmap *map) { struct regcache_rbtree_ctx *rbtree_ctx; @@ -147,6 +194,8 @@ static int regcache_rbtree_init(struct regmap *map) goto err; } + debugfs_create_file("rbtree", 0400, map->debugfs, map, &rbtree_fops); + return 0; err: |