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authorMark Brown <broonie@opensource.wolfsonmicro.com>2013-02-14 17:11:06 +0000
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-02-14 17:11:06 +0000
commit43280026c842c44a8505a1b909378e62f754ecfe (patch)
tree5184f1d8844a0018f776906d637ba46a926455fa /drivers/base
parent3689cf7fd17ea50850f9036f398bd56e08c8806d (diff)
parent4dd7c5531d3b046574da39096b1a66c738aca102 (diff)
Merge remote-tracking branch 'regmap/topic/debugfs' into regmap-next
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/regmap/internal.h1
-rw-r--r--drivers/base/regmap/regmap-debugfs.c50
2 files changed, 33 insertions, 18 deletions
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 20251864177..2cad787fa54 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -26,6 +26,7 @@ struct regmap_debugfs_off_cache {
off_t min;
off_t max;
unsigned int base_reg;
+ unsigned int max_reg;
};
struct regmap_format {
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index d9a6c94ce42..78d5f20c5f5 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -81,6 +81,8 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
struct regmap_debugfs_off_cache *c = NULL;
loff_t p = 0;
unsigned int i, ret;
+ unsigned int fpos_offset;
+ unsigned int reg_offset;
/*
* If we don't have a cache build one so we don't have to do a
@@ -93,6 +95,9 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
regmap_precious(map, i)) {
if (c) {
c->max = p - 1;
+ fpos_offset = c->max - c->min;
+ reg_offset = fpos_offset / map->debugfs_tot_len;
+ c->max_reg = c->base_reg + reg_offset;
list_add_tail(&c->list,
&map->debugfs_off_cache);
c = NULL;
@@ -119,6 +124,9 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
/* Close the last entry off if we didn't scan beyond it */
if (c) {
c->max = p - 1;
+ fpos_offset = c->max - c->min;
+ reg_offset = fpos_offset / map->debugfs_tot_len;
+ c->max_reg = c->base_reg + reg_offset;
list_add_tail(&c->list,
&map->debugfs_off_cache);
}
@@ -128,25 +136,38 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
* allocate and we should never be in this code if there are
* no registers at all.
*/
- if (list_empty(&map->debugfs_off_cache)) {
- WARN_ON(list_empty(&map->debugfs_off_cache));
- return base;
- }
+ WARN_ON(list_empty(&map->debugfs_off_cache));
+ ret = base;
- /* Find the relevant block */
+ /* Find the relevant block:offset */
list_for_each_entry(c, &map->debugfs_off_cache, list) {
if (from >= c->min && from <= c->max) {
- *pos = c->min;
- return c->base_reg;
+ fpos_offset = from - c->min;
+ reg_offset = fpos_offset / map->debugfs_tot_len;
+ *pos = c->min + (reg_offset * map->debugfs_tot_len);
+ return c->base_reg + reg_offset;
}
- *pos = c->min;
- ret = c->base_reg;
+ *pos = c->max;
+ ret = c->max_reg;
}
return ret;
}
+static inline void regmap_calc_tot_len(struct regmap *map,
+ void *buf, size_t count)
+{
+ /* Calculate the length of a fixed format */
+ if (!map->debugfs_tot_len) {
+ map->debugfs_reg_len = regmap_calc_reg_len(map->max_register,
+ buf, count);
+ map->debugfs_val_len = 2 * map->format.val_bytes;
+ map->debugfs_tot_len = map->debugfs_reg_len +
+ map->debugfs_val_len + 3; /* : \n */
+ }
+}
+
static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from,
unsigned int to, char __user *user_buf,
size_t count, loff_t *ppos)
@@ -165,14 +186,7 @@ static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from,
if (!buf)
return -ENOMEM;
- /* Calculate the length of a fixed format */
- if (!map->debugfs_tot_len) {
- map->debugfs_reg_len = regmap_calc_reg_len(map->max_register,
- buf, count);
- map->debugfs_val_len = 2 * map->format.val_bytes;
- map->debugfs_tot_len = map->debugfs_reg_len +
- map->debugfs_val_len + 3; /* : \n */
- }
+ regmap_calc_tot_len(map, buf, count);
/* Work out which register we're starting at */
start_reg = regmap_debugfs_get_dump_start(map, from, *ppos, &p);
@@ -187,7 +201,7 @@ static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from,
/* If we're in the region the user is trying to read */
if (p >= *ppos) {
/* ...but not beyond it */
- if (buf_pos + 1 + map->debugfs_tot_len >= count)
+ if (buf_pos + map->debugfs_tot_len > count)
break;
/* Format the register */