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Diffstat (limited to 'include/linux/regmap.h')
-rw-r--r-- | include/linux/regmap.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h new file mode 100644 index 0000000..a26c1d0 --- /dev/null +++ b/include/linux/regmap.h @@ -0,0 +1,74 @@ +#ifndef __LINUX_REGMAP_H +#define __LINUX_REGMAP_H + +/* + * Register map access API + * + * Copyright 2011 Wolfson Microelectronics plc + * + * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/device.h> +#include <linux/list.h> +#include <linux/module.h> + +struct regmap_config { + int reg_bits; + int val_bits; +}; + +typedef int (*regmap_hw_write)(struct device *dev, const void *data, + size_t count); +typedef int (*regmap_hw_gather_write)(struct device *dev, + const void *reg, size_t reg_len, + const void *val, size_t val_len); +typedef int (*regmap_hw_read)(struct device *dev, + const void *reg_buf, size_t reg_size, + void *val_buf, size_t val_size); + +/** + * Description of a hardware bus for the register map infrastructure. + * + * @list: Internal use. + * @type: Bus type, used to identify bus to be used for a device. + * @write: Write operation. + * @gather_write: Write operation with split register/value, return -ENOTSUPP + * if not implemented on a given device. + * @read: Read operation. Data is returned in the buffer used to transmit + * data. + * @owner: Module with the bus implementation, used to pin the implementation + * in memory. + * @read_flag_mask: Mask to be set in the top byte of the register when doing + * a read. + */ +struct regmap_bus { + struct list_head list; + struct bus_type *type; + regmap_hw_write write; + regmap_hw_gather_write gather_write; + regmap_hw_read read; + struct module *owner; + u8 read_flag_mask; +}; + +struct regmap *regmap_init(struct device *dev, + const struct regmap_bus *bus, + const struct regmap_config *config); +void regmap_exit(struct regmap *map); +int regmap_write(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_read(struct regmap *map, unsigned int reg, unsigned int *val); +int regmap_raw_read(struct regmap *map, unsigned int reg, + void *val, size_t val_len); +int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, + size_t val_count); +int regmap_update_bits(struct regmap *map, unsigned int reg, + unsigned int mask, unsigned int val); + +#endif |