[PATCH] I2C: Move hwmon drivers (2/3)

Part 2: Move the driver files themselves.

Note that the patch "adds trailing whitespace", because it does move the
files as-is, and some files happen to have trailing whitespace.

From: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 846 insertions, 0 deletions

diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
new file mode 100644
index 000000000000..8a40b6976e1a
--- /dev/null
+++ b/drivers/hwmon/w83627ehf.c
@@ -0,0 +1,846 @@
+/*
+    w83627ehf - Driver for the hardware monitoring functionality of
+                the Winbond W83627EHF Super-I/O chip
+    Copyright (C) 2005  Jean Delvare <khali@linux-fr.org>
+
+    Shamelessly ripped from the w83627hf driver
+    Copyright (C) 2003  Mark Studebaker
+
+    Thanks to Leon Moonen, Steve Cliffe and Grant Coady for their help
+    in testing and debugging this driver.
+
+    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 the following chips:
+
+    Chip        #vin    #fan    #pwm    #temp   chip_id man_id
+    w83627ehf   -       5       -       3       0x88    0x5ca3
+
+    This is a preliminary version of the driver, only supporting the
+    fan and temperature inputs. The chip does much more than that.
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/i2c-sensor.h>
+#include <asm/io.h>
+#include "lm75.h"
+
+/* Addresses to scan
+   The actual ISA address is read from Super-I/O configuration space */
+static unsigned short normal_i2c[] = { I2C_CLIENT_END };
+static unsigned int normal_isa[] = { 0, I2C_CLIENT_ISA_END };
+
+/* Insmod parameters */
+SENSORS_INSMOD_1(w83627ehf);
+
+/*
+ * Super-I/O constants and functions
+ */
+
+static int REG;         /* The register to read/write */
+static int VAL;         /* The value to read/write */
+
+#define W83627EHF_LD_HWM        0x0b
+
+#define SIO_REG_LDSEL           0x07    /* Logical device select */
+#define SIO_REG_DEVID           0x20    /* Device ID (2 bytes) */
+#define SIO_REG_ENABLE          0x30    /* Logical device enable */
+#define SIO_REG_ADDR            0x60    /* Logical device address (2 bytes) */
+
+#define SIO_W83627EHF_ID        0x8840
+#define SIO_ID_MASK             0xFFC0
+
+static inline void
+superio_outb(int reg, int val)
+{
+        outb(reg, REG);
+        outb(val, VAL);
+}
+
+static inline int
+superio_inb(int reg)
+{
+        outb(reg, REG);
+        return inb(VAL);
+}
+
+static inline void
+superio_select(int ld)
+{
+        outb(SIO_REG_LDSEL, REG);
+        outb(ld, VAL);
+}
+
+static inline void
+superio_enter(void)
+{
+        outb(0x87, REG);
+        outb(0x87, REG);
+}
+
+static inline void
+superio_exit(void)
+{
+        outb(0x02, REG);
+        outb(0x02, VAL);
+}
+
+/*
+ * ISA constants
+ */
+
+#define REGION_LENGTH           8
+#define ADDR_REG_OFFSET         5
+#define DATA_REG_OFFSET         6
+
+#define W83627EHF_REG_BANK              0x4E
+#define W83627EHF_REG_CONFIG            0x40
+#define W83627EHF_REG_CHIP_ID           0x49
+#define W83627EHF_REG_MAN_ID            0x4F
+
+static const u16 W83627EHF_REG_FAN[] = { 0x28, 0x29, 0x2a, 0x3f, 0x553 };
+static const u16 W83627EHF_REG_FAN_MIN[] = { 0x3b, 0x3c, 0x3d, 0x3e, 0x55c };
+
+#define W83627EHF_REG_TEMP1             0x27
+#define W83627EHF_REG_TEMP1_HYST        0x3a
+#define W83627EHF_REG_TEMP1_OVER        0x39
+static const u16 W83627EHF_REG_TEMP[] = { 0x150, 0x250 };
+static const u16 W83627EHF_REG_TEMP_HYST[] = { 0x153, 0x253 };
+static const u16 W83627EHF_REG_TEMP_OVER[] = { 0x155, 0x255 };
+static const u16 W83627EHF_REG_TEMP_CONFIG[] = { 0x152, 0x252 };
+
+/* Fan clock dividers are spread over the following five registers */
+#define W83627EHF_REG_FANDIV1           0x47
+#define W83627EHF_REG_FANDIV2           0x4B
+#define W83627EHF_REG_VBAT              0x5D
+#define W83627EHF_REG_DIODE             0x59
+#define W83627EHF_REG_SMI_OVT           0x4C
+
+/*
+ * Conversions
+ */
+
+static inline unsigned int
+fan_from_reg(u8 reg, unsigned int div)
+{
+        if (reg == 0 || reg == 255)
+                return 0;
+        return 1350000U / (reg * div);
+}
+
+static inline unsigned int
+div_from_reg(u8 reg)
+{
+        return 1 << reg;
+}
+
+static inline int
+temp1_from_reg(s8 reg)
+{
+        return reg * 1000;
+}
+
+static inline s8
+temp1_to_reg(int temp)
+{
+        if (temp <= -128000)
+                return -128;
+        if (temp >= 127000)
+                return 127;
+        if (temp < 0)
+                return (temp - 500) / 1000;
+        return (temp + 500) / 1000;
+}
+
+/*
+ * Data structures and manipulation thereof
+ */
+
+struct w83627ehf_data {
+        struct i2c_client client;
+        struct semaphore lock;
+
+        struct semaphore update_lock;
+        char valid;             /* !=0 if following fields are valid */
+        unsigned long last_updated;     /* In jiffies */
+
+        /* Register values */
+        u8 fan[5];
+        u8 fan_min[5];
+        u8 fan_div[5];
+        u8 has_fan;             /* some fan inputs can be disabled */
+        s8 temp1;
+        s8 temp1_max;
+        s8 temp1_max_hyst;
+        s16 temp[2];
+        s16 temp_max[2];
+        s16 temp_max_hyst[2];
+};
+
+static inline int is_word_sized(u16 reg)
+{
+        return (((reg & 0xff00) == 0x100
+              || (reg & 0xff00) == 0x200)
+             && ((reg & 0x00ff) == 0x50
+              || (reg & 0x00ff) == 0x53
+              || (reg & 0x00ff) == 0x55));
+}
+
+/* We assume that the default bank is 0, thus the following two functions do
+   nothing for registers which live in bank 0. For others, they respectively
+   set the bank register to the correct value (before the register is
+   accessed), and back to 0 (afterwards). */
+static inline void w83627ehf_set_bank(struct i2c_client *client, u16 reg)
+{
+        if (reg & 0xff00) {
+                outb_p(W83627EHF_REG_BANK, client->addr + ADDR_REG_OFFSET);
+                outb_p(reg >> 8, client->addr + DATA_REG_OFFSET);
+        }
+}
+
+static inline void w83627ehf_reset_bank(struct i2c_client *client, u16 reg)
+{
+        if (reg & 0xff00) {
+                outb_p(W83627EHF_REG_BANK, client->addr + ADDR_REG_OFFSET);
+                outb_p(0, client->addr + DATA_REG_OFFSET);
+        }
+}
+
+static u16 w83627ehf_read_value(struct i2c_client *client, u16 reg)
+{
+        struct w83627ehf_data *data = i2c_get_clientdata(client);
+        int res, word_sized = is_word_sized(reg);
+
+        down(&data->lock);
+
+        w83627ehf_set_bank(client, reg);
+        outb_p(reg & 0xff, client->addr + ADDR_REG_OFFSET);
+        res = inb_p(client->addr + DATA_REG_OFFSET);
+        if (word_sized) {
+                outb_p((reg & 0xff) + 1,
+                       client->addr + ADDR_REG_OFFSET);
+                res = (res << 8) + inb_p(client->addr + DATA_REG_OFFSET);
+        }
+        w83627ehf_reset_bank(client, reg);
+
+        up(&data->lock);
+
+        return res;
+}
+
+static int w83627ehf_write_value(struct i2c_client *client, u16 reg, u16 value)
+{
+        struct w83627ehf_data *data = i2c_get_clientdata(client);
+        int word_sized = is_word_sized(reg);
+
+        down(&data->lock);
+
+        w83627ehf_set_bank(client, reg);
+        outb_p(reg & 0xff, client->addr + ADDR_REG_OFFSET);
+        if (word_sized) {
+                outb_p(value >> 8, client->addr + DATA_REG_OFFSET);
+                outb_p((reg & 0xff) + 1,
+                       client->addr + ADDR_REG_OFFSET);
+        }
+        outb_p(value & 0xff, client->addr + DATA_REG_OFFSET);
+        w83627ehf_reset_bank(client, reg);
+
+        up(&data->lock);
+        return 0;
+}
+
+/* This function assumes that the caller holds data->update_lock */
+static void w83627ehf_write_fan_div(struct i2c_client *client, int nr)
+{
+        struct w83627ehf_data *data = i2c_get_clientdata(client);
+        u8 reg;
+
+        switch (nr) {
+        case 0:
+                reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0xcf)
+                    | ((data->fan_div[0] & 0x03) << 4);
+                w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg);
+                reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xdf)
+                    | ((data->fan_div[0] & 0x04) << 3);
+                w83627ehf_write_value(client, W83627EHF_REG_VBAT, reg);
+                break;
+        case 1:
+                reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0x3f)
+                    | ((data->fan_div[1] & 0x03) << 6);
+                w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg);
+                reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xbf)
+                    | ((data->fan_div[1] & 0x04) << 4);
+                w83627ehf_write_value(client, W83627EHF_REG_VBAT, reg);
+                break;
+        case 2:
+                reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV2) & 0x3f)
+                    | ((data->fan_div[2] & 0x03) << 6);
+                w83627ehf_write_value(client, W83627EHF_REG_FANDIV2, reg);
+                reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0x7f)
+                    | ((data->fan_div[2] & 0x04) << 5);
+                w83627ehf_write_value(client, W83627EHF_REG_VBAT, reg);
+                break;
+        case 3:
+                reg = (w83627ehf_read_value(client, W83627EHF_REG_DIODE) & 0xfc)
+                    | (data->fan_div[3] & 0x03);
+                w83627ehf_write_value(client, W83627EHF_REG_DIODE, reg);
+                reg = (w83627ehf_read_value(client, W83627EHF_REG_SMI_OVT) & 0x7f)
+                    | ((data->fan_div[3] & 0x04) << 5);
+                w83627ehf_write_value(client, W83627EHF_REG_SMI_OVT, reg);
+                break;
+        case 4:
+                reg = (w83627ehf_read_value(client, W83627EHF_REG_DIODE) & 0x73)
+                    | ((data->fan_div[4] & 0x03) << 3)
+                    | ((data->fan_div[4] & 0x04) << 5);
+                w83627ehf_write_value(client, W83627EHF_REG_DIODE, reg);
+                break;
+        }
+}
+
+static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct w83627ehf_data *data = i2c_get_clientdata(client);
+        int i;
+
+        down(&data->update_lock);
+
+        if (time_after(jiffies, data->last_updated + HZ)
+         || !data->valid) {
+                /* Fan clock dividers */
+                i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV1);
+                data->fan_div[0] = (i >> 4) & 0x03;
+                data->fan_div[1] = (i >> 6) & 0x03;
+                i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV2);
+                data->fan_div[2] = (i >> 6) & 0x03;
+                i = w83627ehf_read_value(client, W83627EHF_REG_VBAT);
+                data->fan_div[0] |= (i >> 3) & 0x04;
+                data->fan_div[1] |= (i >> 4) & 0x04;
+                data->fan_div[2] |= (i >> 5) & 0x04;
+                if (data->has_fan & ((1 << 3) | (1 << 4))) {
+                        i = w83627ehf_read_value(client, W83627EHF_REG_DIODE);
+                        data->fan_div[3] = i & 0x03;
+                        data->fan_div[4] = ((i >> 2) & 0x03)
+                                         | ((i >> 5) & 0x04);
+                }
+                if (data->has_fan & (1 << 3)) {
+                        i = w83627ehf_read_value(client, W83627EHF_REG_SMI_OVT);
+                        data->fan_div[3] |= (i >> 5) & 0x04;
+                }
+
+                /* Measured fan speeds and limits */
+                for (i = 0; i < 5; i++) {
+                        if (!(data->has_fan & (1 << i)))
+                                continue;
+
+                        data->fan[i] = w83627ehf_read_value(client,
+                                       W83627EHF_REG_FAN[i]);
+                        data->fan_min[i] = w83627ehf_read_value(client,
+                                           W83627EHF_REG_FAN_MIN[i]);
+
+                        /* If we failed to measure the fan speed and clock
+                           divider can be increased, let's try that for next
+                           time */
+                        if (data->fan[i] == 0xff
+                         && data->fan_div[i] < 0x07) {
+                                dev_dbg(&client->dev, "Increasing fan %d "
+                                        "clock divider from %u to %u\n",
+                                        i, div_from_reg(data->fan_div[i]),
+                                        div_from_reg(data->fan_div[i] + 1));
+                                data->fan_div[i]++;
+                                w83627ehf_write_fan_div(client, i);
+                                /* Preserve min limit if possible */
+                                if (data->fan_min[i] >= 2
+                                 && data->fan_min[i] != 255)
+                                        w83627ehf_write_value(client,
+                                                W83627EHF_REG_FAN_MIN[i],
+                                                (data->fan_min[i] /= 2));
+                        }
+                }
+
+                /* Measured temperatures and limits */
+                data->temp1 = w83627ehf_read_value(client,
+                              W83627EHF_REG_TEMP1);
+                data->temp1_max = w83627ehf_read_value(client,
+                                  W83627EHF_REG_TEMP1_OVER);
+                data->temp1_max_hyst = w83627ehf_read_value(client,
+                                       W83627EHF_REG_TEMP1_HYST);
+                for (i = 0; i < 2; i++) {
+                        data->temp[i] = w83627ehf_read_value(client,
+                                        W83627EHF_REG_TEMP[i]);
+                        data->temp_max[i] = w83627ehf_read_value(client,
+                                            W83627EHF_REG_TEMP_OVER[i]);
+                        data->temp_max_hyst[i] = w83627ehf_read_value(client,
+                                                 W83627EHF_REG_TEMP_HYST[i]);
+                }
+
+                data->last_updated = jiffies;
+                data->valid = 1;
+        }
+
+        up(&data->update_lock);
+        return data;
+}
+
+/*
+ * Sysfs callback functions
+ */
+
+#define show_fan_reg(reg) \
+static ssize_t \
+show_##reg(struct device *dev, char *buf, int nr) \
+{ \
+        struct w83627ehf_data *data = w83627ehf_update_device(dev); \
+        return sprintf(buf, "%d\n", \
+                       fan_from_reg(data->reg[nr], \
+                                    div_from_reg(data->fan_div[nr]))); \
+}
+show_fan_reg(fan);
+show_fan_reg(fan_min);
+
+static ssize_t
+show_fan_div(struct device *dev, char *buf, int nr)
+{
+        struct w83627ehf_data *data = w83627ehf_update_device(dev);
+        return sprintf(buf, "%u\n",
+                       div_from_reg(data->fan_div[nr]));
+}
+
+static ssize_t
+store_fan_min(struct device *dev, const char *buf, size_t count, int nr)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct w83627ehf_data *data = i2c_get_clientdata(client);
+        unsigned int val = simple_strtoul(buf, NULL, 10);
+        unsigned int reg;
+        u8 new_div;
+
+        down(&data->update_lock);
+        if (!val) {
+                /* No min limit, alarm disabled */
+                data->fan_min[nr] = 255;
+                new_div = data->fan_div[nr]; /* No change */
+                dev_info(dev, "fan%u low limit and alarm disabled\n", nr + 1);
+        } else if ((reg = 1350000U / val) >= 128 * 255) {
+                /* Speed below this value cannot possibly be represented,
+                   even with the highest divider (128) */
+                data->fan_min[nr] = 254;
+                new_div = 7; /* 128 == (1 << 7) */
+                dev_warn(dev, "fan%u low limit %u below minimum %u, set to "
+                         "minimum\n", nr + 1, val, fan_from_reg(254, 128));
+        } else if (!reg) {
+                /* Speed above this value cannot possibly be represented,
+                   even with the lowest divider (1) */
+                data->fan_min[nr] = 1;
+                new_div = 0; /* 1 == (1 << 0) */
+                dev_warn(dev, "fan%u low limit %u above maximum %u, set to "
+                         "maximum\n", nr + 1, val, fan_from_reg(1, 1));
+        } else {
+                /* Automatically pick the best divider, i.e. the one such
+                   that the min limit will correspond to a register value
+                   in the 96..192 range */
+                new_div = 0;
+                while (reg > 192 && new_div < 7) {
+                        reg >>= 1;
+                        new_div++;
+                }
+                data->fan_min[nr] = reg;
+        }
+
+        /* Write both the fan clock divider (if it changed) and the new
+           fan min (unconditionally) */
+        if (new_div != data->fan_div[nr]) {
+                if (new_div > data->fan_div[nr])
+                        data->fan[nr] >>= (data->fan_div[nr] - new_div);
+                else
+                        data->fan[nr] <<= (new_div - data->fan_div[nr]);
+
+                dev_dbg(dev, "fan%u clock divider changed from %u to %u\n",
+                        nr + 1, div_from_reg(data->fan_div[nr]),
+                        div_from_reg(new_div));
+                data->fan_div[nr] = new_div;
+                w83627ehf_write_fan_div(client, nr);
+        }
+        w83627ehf_write_value(client, W83627EHF_REG_FAN_MIN[nr],
+                              data->fan_min[nr]);
+        up(&data->update_lock);
+
+        return count;
+}
+
+#define sysfs_fan_offset(offset) \
+static ssize_t \
+show_reg_fan_##offset(struct device *dev, struct device_attribute *attr, \
+                      char *buf) \
+{ \
+        return show_fan(dev, buf, offset-1); \
+} \
+static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
+                   show_reg_fan_##offset, NULL);
+
+#define sysfs_fan_min_offset(offset) \
+static ssize_t \
+show_reg_fan##offset##_min(struct device *dev, struct device_attribute *attr, \
+                           char *buf) \
+{ \
+        return show_fan_min(dev, buf, offset-1); \
+} \
+static ssize_t \
+store_reg_fan##offset##_min(struct device *dev, struct device_attribute *attr, \
+                            const char *buf, size_t count) \
+{ \
+        return store_fan_min(dev, buf, count, offset-1); \
+} \
+static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
+                   show_reg_fan##offset##_min, \
+                   store_reg_fan##offset##_min);
+
+#define sysfs_fan_div_offset(offset) \
+static ssize_t \
+show_reg_fan##offset##_div(struct device *dev, struct device_attribute *attr, \
+                           char *buf) \
+{ \
+        return show_fan_div(dev, buf, offset - 1); \
+} \
+static DEVICE_ATTR(fan##offset##_div, S_IRUGO, \
+                   show_reg_fan##offset##_div, NULL);
+
+sysfs_fan_offset(1);
+sysfs_fan_min_offset(1);
+sysfs_fan_div_offset(1);
+sysfs_fan_offset(2);
+sysfs_fan_min_offset(2);
+sysfs_fan_div_offset(2);
+sysfs_fan_offset(3);
+sysfs_fan_min_offset(3);
+sysfs_fan_div_offset(3);
+sysfs_fan_offset(4);
+sysfs_fan_min_offset(4);
+sysfs_fan_div_offset(4);
+sysfs_fan_offset(5);
+sysfs_fan_min_offset(5);
+sysfs_fan_div_offset(5);
+
+#define show_temp1_reg(reg) \
+static ssize_t \
+show_##reg(struct device *dev, struct device_attribute *attr, \
+           char *buf) \
+{ \
+        struct w83627ehf_data *data = w83627ehf_update_device(dev); \
+        return sprintf(buf, "%d\n", temp1_from_reg(data->reg)); \
+}
+show_temp1_reg(temp1);
+show_temp1_reg(temp1_max);
+show_temp1_reg(temp1_max_hyst);
+
+#define store_temp1_reg(REG, reg) \
+static ssize_t \
+store_temp1_##reg(struct device *dev, struct device_attribute *attr, \
+                  const char *buf, size_t count) \
+{ \
+        struct i2c_client *client = to_i2c_client(dev); \
+        struct w83627ehf_data *data = i2c_get_clientdata(client); \
+        u32 val = simple_strtoul(buf, NULL, 10); \
+ \
+        down(&data->update_lock); \
+        data->temp1_##reg = temp1_to_reg(val); \
+        w83627ehf_write_value(client, W83627EHF_REG_TEMP1_##REG, \
+                              data->temp1_##reg); \
+        up(&data->update_lock); \
+        return count; \
+}
+store_temp1_reg(OVER, max);
+store_temp1_reg(HYST, max_hyst);
+
+static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp1, NULL);
+static DEVICE_ATTR(temp1_max, S_IRUGO| S_IWUSR,
+                   show_temp1_max, store_temp1_max);
+static DEVICE_ATTR(temp1_max_hyst, S_IRUGO| S_IWUSR,
+                   show_temp1_max_hyst, store_temp1_max_hyst);
+
+#define show_temp_reg(reg) \
+static ssize_t \
+show_##reg (struct device *dev, char *buf, int nr) \
+{ \
+        struct w83627ehf_data *data = w83627ehf_update_device(dev); \
+        return sprintf(buf, "%d\n", \
+                       LM75_TEMP_FROM_REG(data->reg[nr])); \
+}
+show_temp_reg(temp);
+show_temp_reg(temp_max);
+show_temp_reg(temp_max_hyst);
+
+#define store_temp_reg(REG, reg) \
+static ssize_t \
+store_##reg (struct device *dev, const char *buf, size_t count, int nr) \
+{ \
+        struct i2c_client *client = to_i2c_client(dev); \
+        struct w83627ehf_data *data = i2c_get_clientdata(client); \
+        u32 val = simple_strtoul(buf, NULL, 10); \
+ \
+        down(&data->update_lock); \
+        data->reg[nr] = LM75_TEMP_TO_REG(val); \
+        w83627ehf_write_value(client, W83627EHF_REG_TEMP_##REG[nr], \
+                              data->reg[nr]); \
+        up(&data->update_lock); \
+        return count; \
+}
+store_temp_reg(OVER, temp_max);
+store_temp_reg(HYST, temp_max_hyst);
+
+#define sysfs_temp_offset(offset) \
+static ssize_t \
+show_reg_temp##offset (struct device *dev, struct device_attribute *attr, \
+                       char *buf) \
+{ \
+        return show_temp(dev, buf, offset - 2); \
+} \
+static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
+                   show_reg_temp##offset, NULL);
+
+#define sysfs_temp_reg_offset(reg, offset) \
+static ssize_t \
+show_reg_temp##offset##_##reg(struct device *dev, struct device_attribute *attr, \
+                              char *buf) \
+{ \
+        return show_temp_##reg(dev, buf, offset - 2); \
+} \
+static ssize_t \
+store_reg_temp##offset##_##reg(struct device *dev, struct device_attribute *attr, \
+                               const char *buf, size_t count) \
+{ \
+        return store_temp_##reg(dev, buf, count, offset - 2); \
+} \
+static DEVICE_ATTR(temp##offset##_##reg, S_IRUGO| S_IWUSR, \
+                   show_reg_temp##offset##_##reg, \
+                   store_reg_temp##offset##_##reg);
+
+sysfs_temp_offset(2);
+sysfs_temp_reg_offset(max, 2);
+sysfs_temp_reg_offset(max_hyst, 2);
+sysfs_temp_offset(3);
+sysfs_temp_reg_offset(max, 3);
+sysfs_temp_reg_offset(max_hyst, 3);
+
+/*
+ * Driver and client management
+ */
+
+static struct i2c_driver w83627ehf_driver;
+
+static void w83627ehf_init_client(struct i2c_client *client)
+{
+        int i;
+        u8 tmp;
+
+        /* Start monitoring is needed */
+        tmp = w83627ehf_read_value(client, W83627EHF_REG_CONFIG);
+        if (!(tmp & 0x01))
+                w83627ehf_write_value(client, W83627EHF_REG_CONFIG,
+                                      tmp | 0x01);
+
+        /* Enable temp2 and temp3 if needed */
+        for (i = 0; i < 2; i++) {
+                tmp = w83627ehf_read_value(client,
+                                           W83627EHF_REG_TEMP_CONFIG[i]);
+                if (tmp & 0x01)
+                        w83627ehf_write_value(client,
+                                              W83627EHF_REG_TEMP_CONFIG[i],
+                                              tmp & 0xfe);
+        }
+}
+
+static int w83627ehf_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+        struct i2c_client *client;
+        struct w83627ehf_data *data;
+        int i, err = 0;
+
+        if (!i2c_is_isa_adapter(adapter))
+                return 0;
+
+        if (!request_region(address, REGION_LENGTH, w83627ehf_driver.name)) {
+                err = -EBUSY;
+                goto exit;
+        }
+
+        if (!(data = kmalloc(sizeof(struct w83627ehf_data), GFP_KERNEL))) {
+                err = -ENOMEM;
+                goto exit_release;
+        }
+        memset(data, 0, sizeof(struct w83627ehf_data));
+
+        client = &data->client;
+        i2c_set_clientdata(client, data);
+        client->addr = address;
+        init_MUTEX(&data->lock);
+        client->adapter = adapter;
+        client->driver = &w83627ehf_driver;
+        client->flags = 0;
+
+        strlcpy(client->name, "w83627ehf", I2C_NAME_SIZE);
+        data->valid = 0;
+        init_MUTEX(&data->update_lock);
+
+        /* Tell the i2c layer a new client has arrived */
+        if ((err = i2c_attach_client(client)))
+                goto exit_free;
+
+        /* Initialize the chip */
+        w83627ehf_init_client(client);
+
+        /* A few vars need to be filled upon startup */
+        for (i = 0; i < 5; i++)
+                data->fan_min[i] = w83627ehf_read_value(client,
+                                   W83627EHF_REG_FAN_MIN[i]);
+
+        /* It looks like fan4 and fan5 pins can be alternatively used
+           as fan on/off switches */
+        data->has_fan = 0x07; /* fan1, fan2 and fan3 */
+        i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV1);
+        if (i & (1 << 2))
+                data->has_fan |= (1 << 3);
+        if (i & (1 << 0))
+                data->has_fan |= (1 << 4);
+
+        /* Register sysfs hooks */
+        device_create_file(&client->dev, &dev_attr_fan1_input);
+        device_create_file(&client->dev, &dev_attr_fan1_min);
+        device_create_file(&client->dev, &dev_attr_fan1_div);
+        device_create_file(&client->dev, &dev_attr_fan2_input);
+        device_create_file(&client->dev, &dev_attr_fan2_min);
+        device_create_file(&client->dev, &dev_attr_fan2_div);
+        device_create_file(&client->dev, &dev_attr_fan3_input);
+        device_create_file(&client->dev, &dev_attr_fan3_min);
+        device_create_file(&client->dev, &dev_attr_fan3_div);
+
+        if (data->has_fan & (1 << 3)) {
+                device_create_file(&client->dev, &dev_attr_fan4_input);
+                device_create_file(&client->dev, &dev_attr_fan4_min);
+                device_create_file(&client->dev, &dev_attr_fan4_div);
+        }
+        if (data->has_fan & (1 << 4)) {
+                device_create_file(&client->dev, &dev_attr_fan5_input);
+                device_create_file(&client->dev, &dev_attr_fan5_min);
+                device_create_file(&client->dev, &dev_attr_fan5_div);
+        }
+
+        device_create_file(&client->dev, &dev_attr_temp1_input);
+        device_create_file(&client->dev, &dev_attr_temp1_max);
+        device_create_file(&client->dev, &dev_attr_temp1_max_hyst);
+        device_create_file(&client->dev, &dev_attr_temp2_input);
+        device_create_file(&client->dev, &dev_attr_temp2_max);
+        device_create_file(&client->dev, &dev_attr_temp2_max_hyst);
+        device_create_file(&client->dev, &dev_attr_temp3_input);
+        device_create_file(&client->dev, &dev_attr_temp3_max);
+        device_create_file(&client->dev, &dev_attr_temp3_max_hyst);
+
+        return 0;
+
+exit_free:
+        kfree(data);
+exit_release:
+        release_region(address, REGION_LENGTH);
+exit:
+        return err;
+}
+
+static int w83627ehf_attach_adapter(struct i2c_adapter *adapter)
+{
+        if (!(adapter->class & I2C_CLASS_HWMON))
+                return 0;
+        return i2c_detect(adapter, &addr_data, w83627ehf_detect);
+}
+
+static int w83627ehf_detach_client(struct i2c_client *client)
+{
+        int err;
+
+        if ((err = i2c_detach_client(client))) {
+                dev_err(&client->dev, "Client deregistration failed, "
+                        "client not detached.\n");
+                return err;
+        }
+        release_region(client->addr, REGION_LENGTH);
+        kfree(i2c_get_clientdata(client));
+
+        return 0;
+}
+
+static struct i2c_driver w83627ehf_driver = {
+        .owner          = THIS_MODULE,
+        .name           = "w83627ehf",
+        .flags          = I2C_DF_NOTIFY,
+        .attach_adapter = w83627ehf_attach_adapter,
+        .detach_client  = w83627ehf_detach_client,
+};
+
+static int __init w83627ehf_find(int sioaddr, int *address)
+{
+        u16 val;
+
+        REG = sioaddr;
+        VAL = sioaddr + 1;
+        superio_enter();
+
+        val = (superio_inb(SIO_REG_DEVID) << 8)
+            | superio_inb(SIO_REG_DEVID + 1);
+        if ((val & SIO_ID_MASK) != SIO_W83627EHF_ID) {
+                superio_exit();
+                return -ENODEV;
+        }
+
+        superio_select(W83627EHF_LD_HWM);
+        val = (superio_inb(SIO_REG_ADDR) << 8)
+            | superio_inb(SIO_REG_ADDR + 1);
+        *address = val & ~(REGION_LENGTH - 1);
+        if (*address == 0) {
+                superio_exit();
+                return -ENODEV;
+        }
+
+        /* Activate logical device if needed */
+        val = superio_inb(SIO_REG_ENABLE);
+        if (!(val & 0x01))
+                superio_outb(SIO_REG_ENABLE, val | 0x01);
+
+        superio_exit();
+        return 0;
+}
+
+static int __init sensors_w83627ehf_init(void)
+{
+        if (w83627ehf_find(0x2e, &normal_isa[0])
+         && w83627ehf_find(0x4e, &normal_isa[0]))
+                return -ENODEV;
+
+        return i2c_add_driver(&w83627ehf_driver);
+}
+
+static void __exit sensors_w83627ehf_exit(void)
+{
+        i2c_del_driver(&w83627ehf_driver);
+}
+
+MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
+MODULE_DESCRIPTION("W83627EHF driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_w83627ehf_init);
+module_exit(sensors_w83627ehf_exit);