path: root/drivers/hwmon/w83791d.c

/*
    w83791d.c - Part of lm_sensors, Linux kernel modules for hardware
                monitoring

    Copyright (C) 2006-2007 Charles Spirakis <bezaur@gmail.com>

    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.
*/

/*
    Supports following chips:

    Chip	#vin	#fanin	#pwm	#temp	wchipid	vendid	i2c	ISA
    w83791d	10	5	3	3	0x71	0x5ca3	yes	no

    The w83791d chip appears to be part way between the 83781d and the
    83792d. Thus, this file is derived from both the w83792d.c and
    w83781d.c files.

    The w83791g chip is the same as the w83791d but lead-free.
*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-vid.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>

#define NUMBER_OF_VIN		10
#define NUMBER_OF_FANIN		5
#define NUMBER_OF_TEMPIN	3

/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
						I2C_CLIENT_END };

/* Insmod parameters */
I2C_CLIENT_INSMOD_1(w83791d);
I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
			"{bus, clientaddr, subclientaddr1, subclientaddr2}");

static int reset;
module_param(reset, bool, 0);
MODULE_PARM_DESC(reset, "Set to one to force a hardware chip reset");

static int init;
module_param(init, bool, 0);
MODULE_PARM_DESC(init, "Set to one to force extra software initialization");

/* The W83791D registers */
static const u8 W83791D_REG_IN[NUMBER_OF_VIN] = {
	0x20,			/* VCOREA in DataSheet */
	0x21,			/* VINR0 in DataSheet */
	0x22,			/* +3.3VIN in DataSheet */
	0x23,			/* VDD5V in DataSheet */
	0x24,			/* +12VIN in DataSheet */
	0x25,			/* -12VIN in DataSheet */
	0x26,			/* -5VIN in DataSheet */
	0xB0,			/* 5VSB in DataSheet */
	0xB1,			/* VBAT in DataSheet */
	0xB2			/* VINR1 in DataSheet */
};

static const u8 W83791D_REG_IN_MAX[NUMBER_OF_VIN] = {
	0x2B,			/* VCOREA High Limit in DataSheet */
	0x2D,			/* VINR0 High Limit in DataSheet */
	0x2F,			/* +3.3VIN High Limit in DataSheet */
	0x31,			/* VDD5V High Limit in DataSheet */
	0x33,			/* +12VIN High Limit in DataSheet */
	0x35,			/* -12VIN High Limit in DataSheet */
	0x37,			/* -5VIN High Limit in DataSheet */
	0xB4,			/* 5VSB High Limit in DataSheet */
	0xB6,			/* VBAT High Limit in DataSheet */
	0xB8			/* VINR1 High Limit in DataSheet */
};
static const u8 W83791D_REG_IN_MIN[NUMBER_OF_VIN] = {
	0x2C,			/* VCOREA Low Limit in DataSheet */
	0x2E,			/* VINR0 Low Limit in DataSheet */
	0x30,