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Subject[PATCH 2/3] [regmap] [RESEND] Add provisions to have user-defined write operation
Date
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>
---
drivers/base/regmap/internal.h | 1 +
drivers/base/regmap/regmap.c | 83 ++++++++++++++++++++++++++--------------
2 files changed, 55 insertions(+), 29 deletions(-)

diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 471eb90..51f0574 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -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;
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index ceaefcf..6845a07 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -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);
}

/**
--
1.7.9.5


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