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Merge branch 'topic/interface' of git://opensource.wolfsonmicro.com/regmap into for-3.2

This commit is contained in:
Mark Brown 2011-09-09 11:11:24 -07:00
parent 694741471b 069af897f9
commit 4ae7335dae
2 changed files with 61 additions and 0 deletions
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9
drivers/base/regmap/regmap.c
View File

@ -37,6 +37,11 @@ struct regmap {
void *work_buf; /* Scratch buffer used to format I/O */
struct regmap_format format; /* Buffer format */
const struct regmap_bus *bus;
unsigned int max_register;
bool (*writeable_reg)(struct device *dev, unsigned int reg);
bool (*readable_reg)(struct device *dev, unsigned int reg);
bool (*volatile_reg)(struct device *dev, unsigned int reg);
};
static void regmap_format_4_12_write(struct regmap *map,
@ -116,6 +121,10 @@ struct regmap *regmap_init(struct device *dev,
map->format.val_bytes = config->val_bits / 8;
map->dev = dev;
map->bus = bus;
map->max_register = config->max_register;
map->writeable_reg = config->writeable_reg;
map->readable_reg = config->readable_reg;
map->volatile_reg = config->volatile_reg;
switch (config->reg_bits) {
case 4:

52
include/linux/regmap.h
View File

@ -20,9 +20,61 @@
struct i2c_client;
struct spi_device;
/**
* Default value for a register. We use an array of structs rather
* than a simple array as many modern devices have very sparse
* register maps.
*
* @reg: Register address.
* @def: Register default value.
*/
struct reg_default {
unsigned int reg;
unsigned int def;
};
/**
* Configuration for the register map of a device.
*
* @reg_bits: Number of bits in a register address, mandatory.
* @val_bits: Number of bits in a register value, mandatory.
*
* @writeable_reg: Optional callback returning true if the register
* can be written to.
* @readable_reg: Optional callback returning true if the register
* can be read from.
* @volatile_reg: Optional callback returning true if the register
* value can't be cached.
* @precious_reg: Optional callback returning true if the rgister
* should not be read outside of a call from the driver
* (eg, a clear on read interrupt status register).
*
* @max_register: Optional, specifies the maximum valid register index.
* @reg_defaults: Power on reset values for registers (for use with
* register cache support).
* @num_reg_defaults: Number of elements in reg_defaults.
*
* @read_flag_mask: Mask to be set in the top byte of the register when doing
* a read.
* @write_flag_mask: Mask to be set in the top byte of the register when doing
* a write. If both read_flag_mask and write_flag_mask are
* empty the regmap_bus default masks are used.
*/
struct regmap_config {
int reg_bits;
int val_bits;
bool (*writeable_reg)(struct device *dev, unsigned int reg);
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);
unsigned int max_register;
struct reg_default *reg_defaults;
int num_reg_defaults;
u8 read_flag_mask;
u8 write_flag_mask;
};
typedef int (*regmap_hw_write)(struct device *dev, const void *data,