linux-imx

/*

 * w83781d.c - Part of lm_sensors, Linux kernel modules for hardware

 *         monitoring

 * Copyright (c) 1998 - 2001  Frodo Looijaard <frodol@dds.nl>,

 *                Philip Edelbrock <phil@netroedge.com>,

 *                and Mark Studebaker <mdsxyz123@yahoo.com>

 * Copyright (c) 2007 - 2008  Jean Delvare <jdelvare@suse.de>

 *

 * 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

 * as99127f 7   3   0   3   0x31    0x12c3  yes no

 * as99127f rev.2 (type_name = as99127f)    0x31    0x5ca3  yes no

 * w83781d  7   3   0   3   0x10-1  0x5ca3  yes yes

 * w83782d  9   3   2-4 3   0x30    0x5ca3  yes yes

 * w83783s  5-6 3   2   1-2 0x40    0x5ca3  yes no

 *

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/jiffies.h>

#include <linux/i2c.h>

#include <linux/hwmon.h>

#include <linux/hwmon-vid.h>

#include <linux/hwmon-sysfs.h>

#include <linux/sysfs.h>

#include <linux/err.h>

#include <linux/mutex.h>

​

#ifdef CONFIG_ISA

#include <linux/platform_device.h>

#include <linux/ioport.h>

#include <linux/io.h>

#endif

​

#include "lm75.h"

​

/* Addresses to scan */

static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,

                        0x2e, 0x2f, I2C_CLIENT_END };

​

enum chips { w83781d, w83782d, w83783s, as99127f };

​

/* 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 reset;

module_param(reset, bool, 0);

MODULE_PARM_DESC(reset, "Set to one to reset chip on load");

​

static bool init = 1;

module_param(init, bool, 0);

MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");

​

/* Constants specified below */

​

/* Length of ISA address segment */

#define W83781D_EXTENT          8

​

/* Where are the ISA address/data registers relative to the base address */

#define W83781D_ADDR_REG_OFFSET     5

#define W83781D_DATA_REG_OFFSET     6

​

/* The device registers */

/* in nr from 0 to 8 */

#define W83781D_REG_IN_MAX(nr)      ((nr < 7) ? (0x2b + (nr) * 2) : \

                            (0x554 + (((nr) - 7) * 2)))

#define W83781D_REG_IN_MIN(nr)      ((nr < 7) ? (0x2c + (nr) * 2) : \

                            (0x555 + (((nr) - 7) * 2)))