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authorBen Whitten <ben.whitten@gmail.com>2018-10-19 12:33:50 +0300
committerMark Brown <broonie@kernel.org>2018-10-19 14:51:19 +0300
commitcdf6b11daa77d4b55ddf0530842a551cc5562a93 (patch)
tree928650d932f30bc39a7eeae0b652a97a650bd69c /include/linux/regmap.h
parent5b394b2ddf0347bef56e50c69a58773c94343ff3 (diff)
downloadlinux-cdf6b11daa77d4b55ddf0530842a551cc5562a93.tar.xz
regmap: Add regmap_noinc_write API
The regmap API had a noinc_read function added for instances where devices supported returning data from an internal FIFO in a single read. This commit adds the noinc_write variant to allow writing to a non incrementing register, this is used in devices such as the sx1301 for loading firmware. Signed-off-by: Ben Whitten <ben.whitten@lairdtech.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/regmap.h')
-rw-r--r--include/linux/regmap.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 379505a53722..de04dc46c7a9 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -268,6 +268,13 @@ typedef void (*regmap_unlock)(void *);
* field is NULL but precious_table (see below) is not, the
* check is performed on such table (a register is precious if
* it belongs to one of the ranges specified by precious_table).
+ * @writeable_noinc_reg: Optional callback returning true if the register
+ * supports multiple write operations without incrementing
+ * the register number. If this field is NULL but
+ * wr_noinc_table (see below) is not, the check is
+ * performed on such table (a register is no increment
+ * writeable if it belongs to one of the ranges specified
+ * by wr_noinc_table).
* @readable_noinc_reg: Optional callback returning true if the register
* supports multiple read operations without incrementing
* the register number. If this field is NULL but
@@ -302,6 +309,7 @@ typedef void (*regmap_unlock)(void *);
* @rd_table: As above, for read access.
* @volatile_table: As above, for volatile registers.
* @precious_table: As above, for precious registers.
+ * @wr_noinc_table: As above, for no increment writeable registers.
* @rd_noinc_table: As above, for no increment readable registers.
* @reg_defaults: Power on reset values for registers (for use with
* register cache support).
@@ -352,6 +360,7 @@ struct regmap_config {
bool (*readable_reg)(struct device *dev, unsigned int reg);
bool (*volatile_reg)(struct device *dev, unsigned int reg);
bool (*precious_reg)(struct device *dev, unsigned int reg);
+ bool (*writeable_noinc_reg)(struct device *dev, unsigned int reg);
bool (*readable_noinc_reg)(struct device *dev, unsigned int reg);
bool disable_locking;
@@ -369,6 +378,7 @@ struct regmap_config {
const struct regmap_access_table *rd_table;
const struct regmap_access_table *volatile_table;
const struct regmap_access_table *precious_table;
+ const struct regmap_access_table *wr_noinc_table;
const struct regmap_access_table *rd_noinc_table;
const struct reg_default *reg_defaults;
unsigned int num_reg_defaults;
@@ -979,6 +989,8 @@ int regmap_write(struct regmap *map, unsigned int reg, unsigned int val);
int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val);
int regmap_raw_write(struct regmap *map, unsigned int reg,
const void *val, size_t val_len);
+int regmap_noinc_write(struct regmap *map, unsigned int reg,
+ const void *val, size_t val_len);
int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
size_t val_count);
int regmap_multi_reg_write(struct regmap *map, const struct reg_sequence *regs,
@@ -1222,6 +1234,13 @@ static inline int regmap_raw_write_async(struct regmap *map, unsigned int reg,
return -EINVAL;
}
+static inline int regmap_noinc_write(struct regmap *map, unsigned int reg,
+ const void *val, size_t val_len)
+{
+ WARN_ONCE(1, "regmap API is disabled");
+ return -EINVAL;
+}
+
static inline int regmap_bulk_write(struct regmap *map, unsigned int reg,
const void *val, size_t val_count)
{