linux-imx

/*

 * thmc50.c - Part of lm_sensors, Linux kernel modules for hardware

 *        monitoring

 * Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>

 * Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and

 * Philip Edelbrock <phil@netroedge.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.

 */

​

#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/jiffies.h>

​

MODULE_LICENSE("GPL");

​

/* Addresses to scan */

static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };

​

/* Insmod parameters */

enum chips { thmc50, adm1022 };

​

static unsigned short adm1022_temp3[16];

static unsigned int adm1022_temp3_num;

module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0);

MODULE_PARM_DESC(adm1022_temp3,

         "List of adapter,address pairs to enable 3rd temperature (ADM1022 only)");

​

/* Many THMC50 constants specified below */

​

/* The THMC50 registers */

#define THMC50_REG_CONF             0x40

#define THMC50_REG_COMPANY_ID           0x3E

#define THMC50_REG_DIE_CODE         0x3F

#define THMC50_REG_ANALOG_OUT           0x19

/*

 * The mirror status register cannot be used as

 * reading it does not clear alarms.

 */

#define THMC50_REG_INTR             0x41

​

static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };

static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };

static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };

static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };