linux-imx

/*

 * w83792d.c - Part of lm_sensors, Linux kernel modules for hardware

 *         monitoring

 * Copyright (C) 2004, 2005 Winbond Electronics Corp.

 *              Shane Huang,

 *              Rudolf Marek <r.marek@assembler.cz>

 *

 * 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.

 *

 * Note:

 * 1. This driver is only for 2.6 kernel, 2.4 kernel need a different driver.

 * 2. This driver is only for Winbond W83792D C version device, there

 *     are also some motherboards with B version W83792D device. The

 *     calculation method to in6-in7(measured value, limits) is a little

 *     different between C and B version. C or B version can be identified

 *     by CR[0x49h].

 */

​

/*

 * Supports following chips:

 *

 * Chip     #vin    #fanin  #pwm    #temp   wchipid vendid  i2c ISA

 * w83792d  9   7   7   3   0x7a    0x5ca3  yes no

 */

​

#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/i2c.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/err.h>

#include <linux/mutex.h>

#include <linux/sysfs.h>

#include <linux/jiffies.h>

​

/* Addresses to scan */

static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,

                        I2C_CLIENT_END };

​

/* Insmod parameters */

​

static unsigned short force_subclients[4];

module_param_array(force_subclients, short, NULL, 0);

MODULE_PARM_DESC(force_subclients,

         "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");

​

static bool init;

module_param(init, bool, 0);

MODULE_PARM_DESC(init, "Set to one to force chip initialization");

​

/* The W83792D registers */

static const u8 W83792D_REG_IN[9] = {

    0x20,   /* Vcore A in DataSheet */

    0x21,   /* Vcore B in DataSheet */

    0x22,   /* VIN0 in DataSheet */

    0x23,   /* VIN1 in DataSheet */

    0x24,   /* VIN2 in DataSheet */

    0x25,   /* VIN3 in DataSheet */

    0x26,   /* 5VCC in DataSheet */

    0xB0,   /* 5VSB in DataSheet */

    0xB1    /* VBAT in DataSheet */

};

#define W83792D_REG_LOW_BITS1 0x3E  /* Low Bits I in DataSheet */

#define W83792D_REG_LOW_BITS2 0x3F  /* Low Bits II in DataSheet */

static const u8 W83792D_REG_IN_MAX[9] = {

    0x2B,   /* Vcore A High Limit in DataSheet */

    0x2D,   /* Vcore B High Limit in DataSheet */

    0x2F,   /* VIN0 High Limit in DataSheet */

    0x31,   /* VIN1 High Limit in DataSheet */

    0x33,   /* VIN2 High Limit in DataSheet */

    0x35,   /* VIN3 High Limit in DataSheet */

    0x37,   /* 5VCC High Limit in DataSheet */

    0xB4,   /* 5VSB High Limit in DataSheet */

    0xB6    /* VBAT High Limit in DataSheet */

};

static const u8 W83792D_REG_IN_MIN[9] = {

    0x2C,   /* Vcore A Low Limit in DataSheet */

    0x2E,   /* Vcore B Low Limit in DataSheet */

    0x30,   /* VIN0 Low Limit in DataSheet */