linux-imx

/*

 * Device driver for the i2c thermostat found on the iBook G4, Albook G4

 *

 * Copyright (C) 2003, 2004 Colin Leroy, Rasmus Rohde, Benjamin Herrenschmidt

 *

 * Documentation from 115254175ADT7467_pra.pdf and 3686221171167ADT7460_b.pdf

 * http://www.onsemi.com/PowerSolutions/product.do?id=ADT7467

 * http://www.onsemi.com/PowerSolutions/product.do?id=ADT7460

 *

 */

​

#include <linux/types.h>

#include <linux/module.h>

#include <linux/errno.h>

#include <linux/kernel.h>

#include <linux/delay.h>

#include <linux/sched.h>

#include <linux/i2c.h>

#include <linux/slab.h>

#include <linux/init.h>

#include <linux/spinlock.h>

#include <linux/wait.h>

#include <linux/suspend.h>

#include <linux/kthread.h>

#include <linux/moduleparam.h>

#include <linux/freezer.h>

#include <linux/of_platform.h>

​

#include <asm/prom.h>

#include <asm/machdep.h>

#include <asm/io.h>

#include <asm/sections.h>

​

#undef DEBUG

​

#define CONFIG_REG   0x40

#define MANUAL_MASK  0xe0

#define AUTO_MASK    0x20

#define INVERT_MASK  0x10

​

static u8 TEMP_REG[3]    = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */

static u8 LIMIT_REG[3]   = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */

static u8 MANUAL_MODE[2] = {0x5c, 0x5d};       

static u8 REM_CONTROL[2] = {0x00, 0x40};

static u8 FAN_SPEED[2]   = {0x28, 0x2a};

static u8 FAN_SPD_SET[2] = {0x30, 0x31};

​

static u8 default_limits_local[3] = {70, 50, 70};    /* local, sensor1, sensor2 */

static u8 default_limits_chip[3] = {80, 65, 80};    /* local, sensor1, sensor2 */

static const char *sensor_location[3] = { "?", "?", "?" };

​

static int limit_adjust;

static int fan_speed = -1;

static bool verbose;

​

MODULE_AUTHOR("Colin Leroy <colin@colino.net>");

MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and "

           "Powerbook G4 Alu");

MODULE_LICENSE("GPL");

​

module_param(limit_adjust, int, 0644);

MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) "

         "by N degrees.");

​

module_param(fan_speed, int, 0644);

MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) "

         "(default 64)");

​

module_param(verbose, bool, 0);

MODULE_PARM_DESC(verbose,"Verbose log operations "

         "(default 0)");

​

struct thermostat {

    struct i2c_client   *clt;

    u8          temps[3];

    u8          cached_temp[3];

    u8          initial_limits[3];

    u8          limits[3];

    int         last_speed[2];

    int         last_var[2];

    int         pwm_inv[2];

    struct task_struct  *thread;

    struct platform_device  *pdev;

    enum {

        ADT7460,

        ADT7467

    }           type;

};

​

static void write_both_fan_speed(struct thermostat *th, int speed);

static void write_fan_speed(struct thermostat *th, int speed, int fan);

​