83 строки
2.6 KiB
C
83 строки
2.6 KiB
C
#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 i2c_client;
|
|
struct spi_device;
|
|
|
|
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);
|
|
struct regmap *regmap_init_i2c(struct i2c_client *i2c,
|
|
const struct regmap_config *config);
|
|
struct regmap *regmap_init_spi(struct spi_device *dev,
|
|
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
|