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regmap: Add provisions to have user-defined write operation

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This commit is a preparatory commit to provide "no-bus" configuration
option for regmap API. It adds necessary plumbing needed to have the
ability to provide user define register write function.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Andrey Smirnov 2013-01-12 12:54:13 -08:00 committed by Mark Brown
parent ad278406b3
commit 07c320dc31
2 changed files with 55 additions and 29 deletions
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1
drivers/base/regmap/internal.h
View file

@ -75,6 +75,7 @@ struct regmap {
const struct regmap_access_table *precious_table;
int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
int (*reg_write)(void *context, unsigned int reg, unsigned int val);
u8 read_flag_mask;
u8 write_flag_mask;

83
drivers/base/regmap/regmap.c
View file

@ -36,6 +36,10 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
static int _regmap_bus_read(void *context, unsigned int reg,
unsigned int *val);
static int _regmap_bus_formatted_write(void *context, unsigned int reg,
unsigned int val);
static int _regmap_bus_raw_write(void *context, unsigned int reg,
unsigned int val);
bool regmap_reg_in_ranges(unsigned int reg,
const struct regmap_range *ranges,
@ -580,6 +584,11 @@ struct regmap *regmap_init(struct device *dev,
goto err_map;
}
if (map->format.format_write)
map->reg_write = _regmap_bus_formatted_write;
else if (map->format.format_val)
map->reg_write = _regmap_bus_raw_write;
map->range_tree = RB_ROOT;
for (i = 0; i < config->num_ranges; i++) {
const struct regmap_range_cfg *range_cfg = &config->ranges[i];
@ -986,12 +995,54 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
return ret;
}
static int _regmap_bus_formatted_write(void *context, unsigned int reg,
unsigned int val)
{
int ret;
struct regmap_range_node *range;
struct regmap *map = context;
BUG_ON(!map->format.format_write);
range = _regmap_range_lookup(map, reg);
if (range) {
ret = _regmap_select_page(map, &reg, range, 1);
if (ret != 0)
return ret;
}
map->format.format_write(map, reg, val);
trace_regmap_hw_write_start(map->dev, reg, 1);
ret = map->bus->write(map->bus_context, map->work_buf,
map->format.buf_size);
trace_regmap_hw_write_done(map->dev, reg, 1);
return ret;
}
static int _regmap_bus_raw_write(void *context, unsigned int reg,
unsigned int val)
{
struct regmap *map = context;
BUG_ON(!map->format.format_val);
map->format.format_val(map->work_buf + map->format.reg_bytes
+ map->format.pad_bytes, val, 0);
return _regmap_raw_write(map, reg,
map->work_buf +
map->format.reg_bytes +
map->format.pad_bytes,
map->format.val_bytes);
}
int _regmap_write(struct regmap *map, unsigned int reg,
unsigned int val)
{
struct regmap_range_node *range;
int ret;
BUG_ON(!map->format.format_write && !map->format.format_val);
if (!map->cache_bypass && map->format.format_write) {
ret = regcache_write(map, reg, val);
@ -1010,33 +1061,7 @@ int _regmap_write(struct regmap *map, unsigned int reg,
trace_regmap_reg_write(map->dev, reg, val);
if (map->format.format_write) {
range = _regmap_range_lookup(map, reg);
if (range) {
ret = _regmap_select_page(map, &reg, range, 1);
if (ret != 0)
return ret;
}
map->format.format_write(map, reg, val);
trace_regmap_hw_write_start(map->dev, reg, 1);
ret = map->bus->write(map->bus_context, map->work_buf,
map->format.buf_size);
trace_regmap_hw_write_done(map->dev, reg, 1);
return ret;
} else {
map->format.format_val(map->work_buf + map->format.reg_bytes
+ map->format.pad_bytes, val, 0);
return _regmap_raw_write(map, reg,
map->work_buf +
map->format.reg_bytes +
map->format.pad_bytes,
map->format.val_bytes);
}
return map->reg_write(map, reg, val);
}
/**