linux-imx

/*

 *  it87.c - Part of lm_sensors, Linux kernel modules for hardware

 *           monitoring.

 *

 *  The IT8705F is an LPC-based Super I/O part that contains UARTs, a

 *  parallel port, an IR port, a MIDI port, a floppy controller, etc., in

 *  addition to an Environment Controller (Enhanced Hardware Monitor and

 *  Fan Controller)

 *

 *  This driver supports only the Environment Controller in the IT8705F and

 *  similar parts.  The other devices are supported by different drivers.

 *

 *  Supports: IT8603E  Super I/O chip w/LPC interface

 *            IT8620E  Super I/O chip w/LPC interface

 *            IT8622E  Super I/O chip w/LPC interface

 *            IT8623E  Super I/O chip w/LPC interface

 *            IT8628E  Super I/O chip w/LPC interface

 *            IT8705F  Super I/O chip w/LPC interface

 *            IT8712F  Super I/O chip w/LPC interface

 *            IT8716F  Super I/O chip w/LPC interface

 *            IT8718F  Super I/O chip w/LPC interface

 *            IT8720F  Super I/O chip w/LPC interface

 *            IT8721F  Super I/O chip w/LPC interface

 *            IT8726F  Super I/O chip w/LPC interface

 *            IT8728F  Super I/O chip w/LPC interface

 *            IT8732F  Super I/O chip w/LPC interface

 *            IT8758E  Super I/O chip w/LPC interface

 *            IT8771E  Super I/O chip w/LPC interface

 *            IT8772E  Super I/O chip w/LPC interface

 *            IT8781F  Super I/O chip w/LPC interface

 *            IT8782F  Super I/O chip w/LPC interface

 *            IT8783E/F Super I/O chip w/LPC interface

 *            IT8786E  Super I/O chip w/LPC interface

 *            IT8790E  Super I/O chip w/LPC interface

 *            IT8792E  Super I/O chip w/LPC interface

 *            Sis950   A clone of the IT8705F

 *

 *  Copyright (C) 2001 Chris Gauthron

 *  Copyright (C) 2005-2010 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.

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/bitops.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/jiffies.h>

#include <linux/platform_device.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/hwmon-vid.h>

#include <linux/err.h>

#include <linux/mutex.h>

#include <linux/sysfs.h>

#include <linux/string.h>

#include <linux/dmi.h>

#include <linux/acpi.h>

#include <linux/io.h>

​

#define DRVNAME "it87"

​

enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8732,

         it8771, it8772, it8781, it8782, it8783, it8786, it8790,

         it8792, it8603, it8620, it8622, it8628 };

​

static unsigned short force_id;

module_param(force_id, ushort, 0);

MODULE_PARM_DESC(force_id, "Override the detected device ID");

​

static struct platform_device *it87_pdev[2];

​

#define REG_2E  0x2e    /* The register to read/write */

#define REG_4E  0x4e    /* Secondary register to read/write */

​

#define DEV 0x07    /* Register: Logical device select */

#define PME 0x04    /* The device with the fan registers in it */

​

/* The device with the IT8718F/IT8720F VID value in it */

#define GPIO    0x07

​

#define DEVID   0x20    /* Register: Device ID */