powerpc/pmac: Convert therm_adt746x to new i2c probing

This simplifies the driver to stop using the deprecated attach interface,

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 204 insertions, 276 deletions

diff --git a/drivers/macintosh/therm_adt746x.c b/drivers/macintosh/therm_adt746x.c
index fc71723cbc48..f433521a6f9d 100644
--- a/drivers/macintosh/therm_adt746x.c
+++ b/drivers/macintosh/therm_adt746x.c
@@ -47,7 +47,7 @@ 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 const char *sensor_location[3] = { "?", "?", "?" };
 
 static int limit_adjust;
 static int fan_speed = -1;
@@ -79,18 +79,16 @@ struct thermostat {
         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 enum {ADT7460, ADT7467} therm_type;
-static int therm_bus, therm_address;
-static struct platform_device * of_dev;
-static struct thermostat* thermostat;
-static struct task_struct *thread_therm = NULL;
-
 static void write_both_fan_speed(struct thermostat *th, int speed);
 static void write_fan_speed(struct thermostat *th, int speed, int fan);
-static void thermostat_create_files(void);
-static void thermostat_remove_files(void);
 
 static int
 write_reg(struct thermostat* th, int reg, u8 data)
@@ -126,66 +124,6 @@ read_reg(struct thermostat* th, int reg)
         return data;
 }
 
-static struct i2c_driver thermostat_driver;
-
-static int
-attach_thermostat(struct i2c_adapter *adapter)
-{
-        unsigned long bus_no;
-        struct i2c_board_info info;
-        struct i2c_client *client;
-
-        if (strncmp(adapter->name, "uni-n", 5))
-                return -ENODEV;
-        bus_no = simple_strtoul(adapter->name + 6, NULL, 10);
-        if (bus_no != therm_bus)
-                return -ENODEV;
-
-        memset(&info, 0, sizeof(struct i2c_board_info));
-        strlcpy(info.type, "therm_adt746x", I2C_NAME_SIZE);
-        info.addr = therm_address;
-        client = i2c_new_device(adapter, &info);
-        if (!client)
-                return -ENODEV;
-
-        /*
-         * Let i2c-core delete that device on driver removal.
-         * This is safe because i2c-core holds the core_lock mutex for us.
-         */
-        list_add_tail(&client->detected, &thermostat_driver.clients);
-        return 0;
-}
-
-static int
-remove_thermostat(struct i2c_client *client)
-{
-        struct thermostat *th = i2c_get_clientdata(client);
-        int i;
-        
-        thermostat_remove_files();
-
-        if (thread_therm != NULL) {
-                kthread_stop(thread_therm);
-        }
-
-        printk(KERN_INFO "adt746x: Putting max temperatures back from "
-                         "%d, %d, %d to %d, %d, %d\n",
-                th->limits[0], th->limits[1], th->limits[2],
-                th->initial_limits[0], th->initial_limits[1],
-                th->initial_limits[2]);
-
-        for (i = 0; i < 3; i++)
-                write_reg(th, LIMIT_REG[i], th->initial_limits[i]);
-
-        write_both_fan_speed(th, -1);
-
-        thermostat = NULL;
-
-        kfree(th);
-
-        return 0;
-}
-
 static int read_fan_speed(struct thermostat *th, u8 addr)
 {
         u8 tmp[2];
@@ -203,7 +141,7 @@ static int read_fan_speed(struct thermostat *th, u8 addr)
 static void write_both_fan_speed(struct thermostat *th, int speed)
 {
         write_fan_speed(th, speed, 0);
-        if (therm_type == ADT7460)
+        if (th->type == ADT7460)
                 write_fan_speed(th, speed, 1);
 }
 
@@ -216,7 +154,7 @@ static void write_fan_speed(struct thermostat *th, int speed, int fan)
         else if (speed < -1) 
                 speed = 0;
         
-        if (therm_type == ADT7467 && fan == 1)
+        if (th->type == ADT7467 && fan == 1)
                 return;
         
         if (th->last_speed[fan] != speed) {
@@ -239,7 +177,7 @@ static void write_fan_speed(struct thermostat *th, int speed, int fan)
                 write_reg(th, FAN_SPD_SET[fan], speed);
         } else {
                 /* back to automatic */
-                if(therm_type == ADT7460) {
+                if(th->type == ADT7460) {
                         manual = read_reg(th,
                                 MANUAL_MODE[fan]) & (~MANUAL_MASK);
                         manual &= ~INVERT_MASK;
@@ -293,7 +231,7 @@ static void update_fans_speed (struct thermostat *th)
         /* we don't care about local sensor, so we start at sensor 1 */
         for (i = 1; i < 3; i++) {
                 int started = 0;
-                int fan_number = (therm_type == ADT7460 && i == 2);
+                int fan_number = (th->type == ADT7460 && i == 2);
                 int var = th->temps[i] - th->limits[i];
 
                 if (var > -1) {
@@ -370,116 +308,22 @@ static int monitor_task(void *arg)
 
 static void set_limit(struct thermostat *th, int i)
 {
-                /* Set sensor1 limit higher to avoid powerdowns */
-                th->limits[i] = default_limits_chip[i] + limit_adjust;
-                write_reg(th, LIMIT_REG[i], th->limits[i]);
+        /* Set sensor1 limit higher to avoid powerdowns */
+        th->limits[i] = default_limits_chip[i] + limit_adjust;
+        write_reg(th, LIMIT_REG[i], th->limits[i]);
                 
-                /* set our limits to normal */
-                th->limits[i] = default_limits_local[i] + limit_adjust;
+        /* set our limits to normal */
+        th->limits[i] = default_limits_local[i] + limit_adjust;
 }
 
-static int probe_thermostat(struct i2c_client *client,
-                            const struct i2c_device_id *id)
-{
-        struct thermostat* th;
-        int rc;
-        int i;
-
-        if (thermostat)
-                return 0;
-
-        th = kzalloc(sizeof(struct thermostat), GFP_KERNEL);
-        if (!th)
-                return -ENOMEM;
-
-        i2c_set_clientdata(client, th);
-        th->clt = client;
-
-        rc = read_reg(th, CONFIG_REG);
-        if (rc < 0) {
-                dev_err(&client->dev, "Thermostat failed to read config!\n");
-                kfree(th);
-                return -ENODEV;
-        }
-
-        /* force manual control to start the fan quieter */
-        if (fan_speed == -1)
-                fan_speed = 64;
-        
-        if(therm_type == ADT7460) {
-                printk(KERN_INFO "adt746x: ADT7460 initializing\n");
-                /* The 7460 needs to be started explicitly */
-                write_reg(th, CONFIG_REG, 1);
-        } else
-                printk(KERN_INFO "adt746x: ADT7467 initializing\n");
-
-        for (i = 0; i < 3; i++) {
-                th->initial_limits[i] = read_reg(th, LIMIT_REG[i]);
-                set_limit(th, i);
-        }
-
-        printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d"
-                         " to %d, %d, %d\n",
-                         th->initial_limits[0], th->initial_limits[1],
-                         th->initial_limits[2], th->limits[0], th->limits[1],
-                         th->limits[2]);
-
-        thermostat = th;
-
-        /* record invert bit status because fw can corrupt it after suspend */
-        th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK;
-        th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK;
-
-        /* be sure to really write fan speed the first time */
-        th->last_speed[0] = -2;
-        th->last_speed[1] = -2;
-        th->last_var[0] = -80;
-        th->last_var[1] = -80;
-
-        if (fan_speed != -1) {
-                /* manual mode, stop fans */
-                write_both_fan_speed(th, 0);
-        } else {
-                /* automatic mode */
-                write_both_fan_speed(th, -1);
-        }
-        
-        thread_therm = kthread_run(monitor_task, th, "kfand");
-
-        if (thread_therm == ERR_PTR(-ENOMEM)) {
-                printk(KERN_INFO "adt746x: Kthread creation failed\n");
-                thread_therm = NULL;
-                return -ENOMEM;
-        }
-
-        thermostat_create_files();
-
-        return 0;
+#define BUILD_SHOW_FUNC_INT(name, data)                         \
+static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf)        \
+{                                                               \
+        struct thermostat *th = dev_get_drvdata(dev);           \
+        return sprintf(buf, "%d\n", data);                      \
 }
 
-static const struct i2c_device_id therm_adt746x_id[] = {
-        { "therm_adt746x", 0 },
-        { }
-};
-
-static struct i2c_driver thermostat_driver = {
-        .driver = {
-                .name   = "therm_adt746x",
-        },
-        .attach_adapter = attach_thermostat,
-        .probe = probe_thermostat,
-        .remove = remove_thermostat,
-        .id_table = therm_adt746x_id,
-};
-
-/* 
- * Now, unfortunately, sysfs doesn't give us a nice void * we could
- * pass around to the attribute functions, so we don't really have
- * choice but implement a bunch of them...
- *
- * FIXME, it does now...
- */
-#define BUILD_SHOW_FUNC_INT(name, data)                         \
+#define BUILD_SHOW_FUNC_INT_LITE(name, data)                            \
 static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf)        \
 {                                                               \
         return sprintf(buf, "%d\n", data);                      \
@@ -494,22 +338,24 @@ static ssize_t show_##name(struct device *dev, struct device_attribute *attr, ch
 #define BUILD_SHOW_FUNC_FAN(name, data)                         \
 static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf)       \
 {                                                               \
+        struct thermostat *th = dev_get_drvdata(dev);           \
         return sprintf(buf, "%d (%d rpm)\n",                    \
-                thermostat->last_speed[data],                   \
-                read_fan_speed(thermostat, FAN_SPEED[data])     \
+                th->last_speed[data],                           \
+                read_fan_speed(th, FAN_SPEED[data])             \
                 );                                              \
 }
 
 #define BUILD_STORE_FUNC_DEG(name, data)                        \
 static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
 {                                                               \
+        struct thermostat *th = dev_get_drvdata(dev);           \
         int val;                                                \
         int i;                                                  \
         val = simple_strtol(buf, NULL, 10);                     \
         printk(KERN_INFO "Adjusting limits by %d degrees\n", val);      \
         limit_adjust = val;                                     \
         for (i=0; i < 3; i++)                                   \
-                set_limit(thermostat, i);                       \
+                set_limit(th, i);                               \
         return n;                                               \
 }
 
@@ -525,20 +371,21 @@ static ssize_t store_##name(struct device *dev, struct device_attribute *attr, c
         return n;                                               \
 }
 
-BUILD_SHOW_FUNC_INT(sensor1_temperature,         (read_reg(thermostat, TEMP_REG[1])))
-BUILD_SHOW_FUNC_INT(sensor2_temperature,         (read_reg(thermostat, TEMP_REG[2])))
-BUILD_SHOW_FUNC_INT(sensor1_limit,               thermostat->limits[1])
-BUILD_SHOW_FUNC_INT(sensor2_limit,               thermostat->limits[2])
+BUILD_SHOW_FUNC_INT(sensor1_temperature,         (read_reg(th, TEMP_REG[1])))
+BUILD_SHOW_FUNC_INT(sensor2_temperature,         (read_reg(th, TEMP_REG[2])))
+BUILD_SHOW_FUNC_INT(sensor1_limit,               th->limits[1])
+BUILD_SHOW_FUNC_INT(sensor2_limit,               th->limits[2])
 BUILD_SHOW_FUNC_STR(sensor1_location,            sensor_location[1])
 BUILD_SHOW_FUNC_STR(sensor2_location,            sensor_location[2])
 
-BUILD_SHOW_FUNC_INT(specified_fan_speed, fan_speed)
+BUILD_SHOW_FUNC_INT_LITE(specified_fan_speed, fan_speed)
+BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed)
+
 BUILD_SHOW_FUNC_FAN(sensor1_fan_speed,   0)
 BUILD_SHOW_FUNC_FAN(sensor2_fan_speed,   1)
 
-BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed)
-BUILD_SHOW_FUNC_INT(limit_adjust,        limit_adjust)
-BUILD_STORE_FUNC_DEG(limit_adjust,       thermostat)
+BUILD_SHOW_FUNC_INT_LITE(limit_adjust,   limit_adjust)
+BUILD_STORE_FUNC_DEG(limit_adjust,       th)
                 
 static DEVICE_ATTR(sensor1_temperature, S_IRUGO,
                    show_sensor1_temperature,NULL);
@@ -564,53 +411,77 @@ static DEVICE_ATTR(sensor2_fan_speed,	S_IRUGO,
 static DEVICE_ATTR(limit_adjust,        S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
                    show_limit_adjust,   store_limit_adjust);
 
-
-static int __init
-thermostat_init(void)
+static void thermostat_create_files(struct thermostat *th)
 {
-        struct device_node* np;
-        const u32 *prop;
-        int i = 0, offset = 0;
+        struct device_node *np = th->clt->dev.of_node;
+        struct device *dev;
+        int err;
 
-        np = of_find_node_by_name(NULL, "fan");
-        if (!np)
-                return -ENODEV;
-        if (of_device_is_compatible(np, "adt7460"))
-                therm_type = ADT7460;
-        else if (of_device_is_compatible(np, "adt7467"))
-                therm_type = ADT7467;
-        else {
-                of_node_put(np);
-                return -ENODEV;
-        }
+        /* To maintain ABI compatibility with userspace, create
+         * the old style platform driver and attach the attributes
+         * to it here
+         */
+        th->pdev = of_platform_device_create(np, "temperatures", NULL);
+        if (!th->pdev)
+                return;
+        dev = &th->pdev->dev;
+        dev_set_drvdata(dev, th);
+        err = device_create_file(dev, &dev_attr_sensor1_temperature);
+        err |= device_create_file(dev, &dev_attr_sensor2_temperature);
+        err |= device_create_file(dev, &dev_attr_sensor1_limit);
+        err |= device_create_file(dev, &dev_attr_sensor2_limit);
+        err |= device_create_file(dev, &dev_attr_sensor1_location);
+        err |= device_create_file(dev, &dev_attr_sensor2_location);
+        err |= device_create_file(dev, &dev_attr_limit_adjust);
+        err |= device_create_file(dev, &dev_attr_specified_fan_speed);
+        err |= device_create_file(dev, &dev_attr_sensor1_fan_speed);
+        if(th->type == ADT7460)
+                err |= device_create_file(dev, &dev_attr_sensor2_fan_speed);
+        if (err)
+                printk(KERN_WARNING
+                        "Failed to create temperature attribute file(s).\n");
+}
 
-        prop = of_get_property(np, "hwsensor-params-version", NULL);
-        printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop,
-                         (*prop == 1)?"":"un");
-        if (*prop != 1) {
-                of_node_put(np);
-                return -ENODEV;
-        }
+static void thermostat_remove_files(struct thermostat *th)
+{
+        struct device *dev;
 
-        prop = of_get_property(np, "reg", NULL);
-        if (!prop) {
-                of_node_put(np);
-                return -ENODEV;
-        }
+        if (!th->pdev)
+                return;
+        dev = &th->pdev->dev;
+        device_remove_file(dev, &dev_attr_sensor1_temperature);
+        device_remove_file(dev, &dev_attr_sensor2_temperature);
+        device_remove_file(dev, &dev_attr_sensor1_limit);
+        device_remove_file(dev, &dev_attr_sensor2_limit);
+        device_remove_file(dev, &dev_attr_sensor1_location);
+        device_remove_file(dev, &dev_attr_sensor2_location);
+        device_remove_file(dev, &dev_attr_limit_adjust);
+        device_remove_file(dev, &dev_attr_specified_fan_speed);
+        device_remove_file(dev, &dev_attr_sensor1_fan_speed);   
+        if (th->type == ADT7460)
+                device_remove_file(dev, &dev_attr_sensor2_fan_speed);
+        of_device_unregister(th->pdev);
 
-        /* look for bus either by path or using "reg" */
-        if (strstr(np->full_name, "/i2c-bus@") != NULL) {
-                const char *tmp_bus = (strstr(np->full_name, "/i2c-bus@") + 9);
-                therm_bus = tmp_bus[0]-'0';
-        } else {
-                therm_bus = ((*prop) >> 8) & 0x0f;
-        }
+}
 
-        therm_address = ((*prop) & 0xff) >> 1;
+static int probe_thermostat(struct i2c_client *client,
+                            const struct i2c_device_id *id)
+{
+        struct device_node *np = client->dev.of_node;
+        struct thermostat* th;
+        const __be32 *prop;
+        int i, rc, vers, offset = 0;
 
-        printk(KERN_INFO "adt746x: Thermostat bus: %d, address: 0x%02x, "
-                         "limit_adjust: %d, fan_speed: %d\n",
-                         therm_bus, therm_address, limit_adjust, fan_speed);
+        if (!np)
+                return -ENXIO;
+        prop = of_get_property(np, "hwsensor-params-version", NULL);
+        if (!prop)
+                return -ENXIO;
+        vers = be32_to_cpup(prop);
+        printk(KERN_INFO "adt746x: version %d (%ssupported)\n",
+               vers, vers == 1 ? "" : "un");
+        if (vers != 1)
+                return -ENXIO;
 
         if (of_get_property(np, "hwsensor-location", NULL)) {
                 for (i = 0; i < 3; i++) {
@@ -623,72 +494,129 @@ thermostat_init(void)
                         printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]);
                         offset += strlen(sensor_location[i]) + 1;
                 }
-        } else {
-                sensor_location[0] = "?";
-                sensor_location[1] = "?";
-                sensor_location[2] = "?";
         }
 
-        of_dev = of_platform_device_create(np, "temperatures", NULL);
-        of_node_put(np);
+        th = kzalloc(sizeof(struct thermostat), GFP_KERNEL);
+        if (!th)
+                return -ENOMEM;
+
+        i2c_set_clientdata(client, th);
+        th->clt = client;
+        th->type = id->driver_data;
 
-        if (of_dev == NULL) {
-                printk(KERN_ERR "Can't register temperatures device !\n");
+        rc = read_reg(th, CONFIG_REG);
+        if (rc < 0) {
+                dev_err(&client->dev, "Thermostat failed to read config!\n");
+                kfree(th);
                 return -ENODEV;
         }
 
-#ifndef CONFIG_I2C_POWERMAC
-        request_module("i2c-powermac");
-#endif
+        /* force manual control to start the fan quieter */
+        if (fan_speed == -1)
+                fan_speed = 64;
+        
+        if (th->type == ADT7460) {
+                printk(KERN_INFO "adt746x: ADT7460 initializing\n");
+                /* The 7460 needs to be started explicitly */
+                write_reg(th, CONFIG_REG, 1);
+        } else
+                printk(KERN_INFO "adt746x: ADT7467 initializing\n");
 
-        return i2c_add_driver(&thermostat_driver);
+        for (i = 0; i < 3; i++) {
+                th->initial_limits[i] = read_reg(th, LIMIT_REG[i]);
+                set_limit(th, i);
+        }
+
+        printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d"
+                         " to %d, %d, %d\n",
+                         th->initial_limits[0], th->initial_limits[1],
+                         th->initial_limits[2], th->limits[0], th->limits[1],
+                         th->limits[2]);
+
+        /* record invert bit status because fw can corrupt it after suspend */
+        th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK;
+        th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK;
+
+        /* be sure to really write fan speed the first time */
+        th->last_speed[0] = -2;
+        th->last_speed[1] = -2;
+        th->last_var[0] = -80;
+        th->last_var[1] = -80;
+
+        if (fan_speed != -1) {
+                /* manual mode, stop fans */
+                write_both_fan_speed(th, 0);
+        } else {
+                /* automatic mode */
+                write_both_fan_speed(th, -1);
+        }
+        
+        th->thread = kthread_run(monitor_task, th, "kfand");
+        if (th->thread == ERR_PTR(-ENOMEM)) {
+                printk(KERN_INFO "adt746x: Kthread creation failed\n");
+                th->thread = NULL;
+                return -ENOMEM;
+        }
+
+        thermostat_create_files(th);
+
+        return 0;
 }
 
-static void thermostat_create_files(void)
+static int remove_thermostat(struct i2c_client *client)
 {
-        int err;
+        struct thermostat *th = i2c_get_clientdata(client);
+        int i;
+        
+        thermostat_remove_files(th);
 
-        err = device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature);
-        err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature);
-        err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_limit);
-        err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_limit);
-        err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_location);
-        err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_location);
-        err |= device_create_file(&of_dev->dev, &dev_attr_limit_adjust);
-        err |= device_create_file(&of_dev->dev, &dev_attr_specified_fan_speed);
-        err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_fan_speed);
-        if(therm_type == ADT7460)
-                err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_fan_speed);
-        if (err)
-                printk(KERN_WARNING
-                        "Failed to create temperature attribute file(s).\n");
+        if (th->thread != NULL)
+                kthread_stop(th->thread);
+
+        printk(KERN_INFO "adt746x: Putting max temperatures back from "
+                         "%d, %d, %d to %d, %d, %d\n",
+                th->limits[0], th->limits[1], th->limits[2],
+                th->initial_limits[0], th->initial_limits[1],
+                th->initial_limits[2]);
+
+        for (i = 0; i < 3; i++)
+                write_reg(th, LIMIT_REG[i], th->initial_limits[i]);
+
+        write_both_fan_speed(th, -1);
+
+        kfree(th);
+
+        return 0;
 }
 
-static void thermostat_remove_files(void)
+static const struct i2c_device_id therm_adt746x_id[] = {
+        { "MAC,adt7460", ADT7460 },
+        { "MAC,adt7467", ADT7467 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, therm_adt746x_id);
+
+static struct i2c_driver thermostat_driver = {
+        .driver = {
+                .name   = "therm_adt746x",
+        },
+        .probe = probe_thermostat,
+        .remove = remove_thermostat,
+        .id_table = therm_adt746x_id,
+};
+
+static int __init thermostat_init(void)
 {
-        if (of_dev) {
-                device_remove_file(&of_dev->dev, &dev_attr_sensor1_temperature);
-                device_remove_file(&of_dev->dev, &dev_attr_sensor2_temperature);
-                device_remove_file(&of_dev->dev, &dev_attr_sensor1_limit);
-                device_remove_file(&of_dev->dev, &dev_attr_sensor2_limit);
-                device_remove_file(&of_dev->dev, &dev_attr_sensor1_location);
-                device_remove_file(&of_dev->dev, &dev_attr_sensor2_location);
-                device_remove_file(&of_dev->dev, &dev_attr_limit_adjust);
-                device_remove_file(&of_dev->dev, &dev_attr_specified_fan_speed);
-                device_remove_file(&of_dev->dev, &dev_attr_sensor1_fan_speed);
-
-                if(therm_type == ADT7460)
-                        device_remove_file(&of_dev->dev,
-                                           &dev_attr_sensor2_fan_speed);
+#ifndef CONFIG_I2C_POWERMAC
+        request_module("i2c-powermac");
+#endif
 
-        }
+        return i2c_add_driver(&thermostat_driver);
 }
 
-static void __exit
-thermostat_exit(void)
+static void __exit thermostat_exit(void)
 {
         i2c_del_driver(&thermostat_driver);
-        of_device_unregister(of_dev);
 }
 
 module_init(thermostat_init);