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/*
* i2c_dev_sysfs.h - The i2c device sysfs library header
*
* Copyright 2015-present Facebook. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef I2C_DEV_SYSFS_H
#define I2C_DEV_SYSFS_H
#include <linux/device.h>
#include <linux/types.h>
typedef ssize_t (*i2c_dev_attr_show_fn)(struct device *dev,
struct device_attribute *attr,
char *buf);
typedef ssize_t (*i2c_dev_attr_store_fn)(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count);
#define I2C_DEV_ATTR_SHOW_DEFAULT (i2c_dev_attr_show_fn)(1)
#define I2C_DEV_ATTR_STORE_DEFAULT (i2c_dev_attr_store_fn)(1)
typedef struct i2c_dev_attr_st_ {
const char *ida_name;
const char *ida_help;
i2c_dev_attr_show_fn ida_show;
i2c_dev_attr_store_fn ida_store;
int ida_reg;
int ida_bit_offset;
int ida_n_bits;
} i2c_dev_attr_st;
typedef struct i2c_sysfs_attr_st_{
struct device_attribute isa_dev_attr;
const i2c_dev_attr_st *isa_i2c_attr;
} i2c_sysfs_attr_st;
#define TO_I2C_SYSFS_ATTR(_attr) \
container_of(_attr, i2c_sysfs_attr_st, isa_dev_attr)
typedef struct i2c_dev_data_st_ {
struct device *idd_hwmon_dev;
struct mutex idd_lock;
i2c_sysfs_attr_st *idd_attrs;
struct attribute_group idd_attr_group;
} i2c_dev_data_st;
int i2c_dev_sysfs_data_init(struct i2c_client *client,
i2c_dev_data_st *data,
const i2c_dev_attr_st *dev_attrs,
int n_attrs);
void i2c_dev_sysfs_data_clean(struct i2c_client *client, i2c_dev_data_st *data);
int i2c_dev_read_byte(struct device *dev,
struct device_attribute *attr);
int i2c_dev_read_nbytes(struct device *dev,
struct device_attribute *attr,
uint8_t values[],
int nbytes);
int i2c_dev_read_word_littleendian(struct device *dev,
struct device_attribute *attr);
int i2c_dev_read_word_bigendian(struct device *dev,
struct device_attribute *attr);
ssize_t i2c_dev_show_label(struct device *dev,
struct device_attribute *attr,
char *buf);
ssize_t i2c_dev_show_ascii(struct device *dev,
struct device_attribute *attr,
char *buf);
#endif
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