diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/regmap.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h index 60a65cd7e1a0..c878a4bf717e 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -20,9 +20,32 @@ struct i2c_client; struct spi_device; +/** + * 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. + * + * @max_register: Optional, specifies the maximum valid register index. + * @writeable_register: Optional callback returning true if the register + * can be written to. + * @readable_register: Optional callback returning true if the register + * can be read from. + * @volatile_register: Optional callback returning true if the register + * value can't be cached. + * @precious_register: 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). + */ struct regmap_config { int reg_bits; int val_bits; + + 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); + bool (*precious_reg)(struct device *dev, unsigned int reg); }; typedef int (*regmap_hw_write)(struct device *dev, const void *data, |