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regmap: Implement managed regmap_init() 

Save error handling and unwinding code in drivers by providing managed
versions of the regmap init functions, simplifying usage.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
hifive-unleashed-5.1
Mark Brown 2012-01-30 19:56:52 +00:00
parent 567e47935a
commit c0eb46766d
4 changed files with 81 additions and 0 deletions
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17
drivers/base/regmap/regmap-i2c.c
View File

@ -111,4 +111,21 @@ struct regmap *regmap_init_i2c(struct i2c_client *i2c,
}
EXPORT_SYMBOL_GPL(regmap_init_i2c);
/**
* devm_regmap_init_i2c(): Initialise managed register map
*
* @i2c: Device that will be interacted with
* @config: Configuration for register map
*
* The return value will be an ERR_PTR() on error or a valid pointer
* to a struct regmap. The regmap will be automatically freed by the
* device management code.
*/
struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,
const struct regmap_config *config)
{
return devm_regmap_init(&i2c->dev, &regmap_i2c, config);
}
EXPORT_SYMBOL_GPL(devm_regmap_init_i2c);
MODULE_LICENSE("GPL");

17
drivers/base/regmap/regmap-spi.c
View File

@ -70,4 +70,21 @@ struct regmap *regmap_init_spi(struct spi_device *spi,
}
EXPORT_SYMBOL_GPL(regmap_init_spi);
/**
* devm_regmap_init_spi(): Initialise register map
*
* @spi: Device that will be interacted with
* @config: Configuration for register map
*
* The return value will be an ERR_PTR() on error or a valid pointer
* to a struct regmap. The map will be automatically freed by the
* device management code.
*/
struct regmap *devm_regmap_init_spi(struct spi_device *spi,
const struct regmap_config *config)
{
return devm_regmap_init(&spi->dev, &regmap_spi, config);
}
EXPORT_SYMBOL_GPL(devm_regmap_init_spi);
MODULE_LICENSE("GPL");

39
drivers/base/regmap/regmap.c
View File

@ -258,6 +258,45 @@ err:
}
EXPORT_SYMBOL_GPL(regmap_init);
static void devm_regmap_release(struct device *dev, void *res)
{
regmap_exit(*(struct regmap **)res);
}
/**
* devm_regmap_init(): Initialise managed register map
*
* @dev: Device that will be interacted with
* @bus: Bus-specific callbacks to use with device
* @config: Configuration for register map
*
* The return value will be an ERR_PTR() on error or a valid pointer
* to a struct regmap. This function should generally not be called
* directly, it should be called by bus-specific init functions. The
* map will be automatically freed by the device management code.
*/
struct regmap *devm_regmap_init(struct device *dev,
const struct regmap_bus *bus,
const struct regmap_config *config)
{
struct regmap **ptr, *regmap;
ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
regmap = regmap_init(dev, bus, config);
if (!IS_ERR(regmap)) {
*ptr = regmap;
devres_add(dev, ptr);
} else {
devres_free(ptr);
}
return regmap;
}
EXPORT_SYMBOL_GPL(devm_regmap_init);
/**
* regmap_reinit_cache(): Reinitialise the current register cache
*

8
include/linux/regmap.h
View File

@ -127,6 +127,14 @@ struct regmap *regmap_init_i2c(struct i2c_client *i2c,
struct regmap *regmap_init_spi(struct spi_device *dev,
const struct regmap_config *config);
struct regmap *devm_regmap_init(struct device *dev,
const struct regmap_bus *bus,
const struct regmap_config *config);
struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,
const struct regmap_config *config);
struct regmap *devm_regmap_init_spi(struct spi_device *dev,
const struct regmap_config *config);
void regmap_exit(struct regmap *map);
int regmap_reinit_cache(struct regmap *map,
const struct regmap_config *config);