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regmap: Add a bulk field API

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Useful for devices with many fields.
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Merge tag 'regmap-field-bulk-api' into regmap-5.10

regmap: Add a bulk field API

Useful for devices with many fields.
This commit is contained in:
Mark Brown 2020-09-28 20:50:47 +01:00
commit d05199af72
2 changed files with 111 additions and 0 deletions
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100
drivers/base/regmap/regmap.c
View file

@ -1254,6 +1254,106 @@ struct regmap_field *devm_regmap_field_alloc(struct device *dev,
}
EXPORT_SYMBOL_GPL(devm_regmap_field_alloc);
/**
* regmap_field_bulk_alloc() - Allocate and initialise a bulk register field.
*
* @regmap: regmap bank in which this register field is located.
* @rm_field: regmap register fields within the bank.
* @reg_field: Register fields within the bank.
* @num_fields: Number of register fields.
*
* The return value will be an -ENOMEM on error or zero for success.
* Newly allocated regmap_fields should be freed by calling
* regmap_field_bulk_free()
*/
int regmap_field_bulk_alloc(struct regmap *regmap,
struct regmap_field **rm_field,
struct reg_field *reg_field,
int num_fields)
{
struct regmap_field *rf;
int i;
rf = kcalloc(num_fields, sizeof(*rf), GFP_KERNEL);
if (!rf)
return -ENOMEM;
for (i = 0; i < num_fields; i++) {
regmap_field_init(&rf[i], regmap, reg_field[i]);
rm_field[i] = &rf[i];
}
return 0;
}
EXPORT_SYMBOL_GPL(regmap_field_bulk_alloc);
/**
* devm_regmap_field_bulk_alloc() - Allocate and initialise a bulk register
* fields.
*
* @dev: Device that will be interacted with
* @regmap: regmap bank in which this register field is located.
* @rm_field: regmap register fields within the bank.
* @reg_field: Register fields within the bank.
* @num_fields: Number of register fields.
*
* The return value will be an -ENOMEM on error or zero for success.
* Newly allocated regmap_fields will be automatically freed by the
* device management code.
*/
int devm_regmap_field_bulk_alloc(struct device *dev,
struct regmap *regmap,
struct regmap_field **rm_field,
struct reg_field *reg_field,
int num_fields)
{
struct regmap_field *rf;
int i;
rf = devm_kcalloc(dev, num_fields, sizeof(*rf), GFP_KERNEL);
if (!rf)
return -ENOMEM;
for (i = 0; i < num_fields; i++) {
regmap_field_init(&rf[i], regmap, reg_field[i]);
rm_field[i] = &rf[i];
}
return 0;
}
EXPORT_SYMBOL_GPL(devm_regmap_field_bulk_alloc);
/**
* regmap_field_bulk_free() - Free register field allocated using
* regmap_field_bulk_alloc.
*
* @field: regmap fields which should be freed.
*/
void regmap_field_bulk_free(struct regmap_field *field)
{
kfree(field);
}
EXPORT_SYMBOL_GPL(regmap_field_bulk_free);
/**
* devm_regmap_field_bulk_free() - Free a bulk register field allocated using
* devm_regmap_field_bulk_alloc.
*
* @dev: Device that will be interacted with
* @field: regmap field which should be freed.
*
* Free register field allocated using devm_regmap_field_bulk_alloc(). Usually
* drivers need not call this function, as the memory allocated via devm
* will be freed as per device-driver life-cycle.
*/
void devm_regmap_field_bulk_free(struct device *dev,
struct regmap_field *field)
{
devm_kfree(dev, field);
}
EXPORT_SYMBOL_GPL(devm_regmap_field_bulk_free);
/**
* devm_regmap_field_free() - Free a register field allocated using
* devm_regmap_field_alloc.

11
include/linux/regmap.h
View file

@ -1189,6 +1189,17 @@ struct regmap_field *devm_regmap_field_alloc(struct device *dev,
struct regmap *regmap, struct reg_field reg_field);
void devm_regmap_field_free(struct device *dev, struct regmap_field *field);
int regmap_field_bulk_alloc(struct regmap *regmap,
struct regmap_field **rm_field,
struct reg_field *reg_field,
int num_fields);
void regmap_field_bulk_free(struct regmap_field *field);
int devm_regmap_field_bulk_alloc(struct device *dev, struct regmap *regmap,
struct regmap_field **field,
struct reg_field *reg_field, int num_fields);
void devm_regmap_field_bulk_free(struct device *dev,
struct regmap_field *field);
int regmap_field_read(struct regmap_field *field, unsigned int *val);
int regmap_field_update_bits_base(struct regmap_field *field,
unsigned int mask, unsigned int val,