]> err.no Git - linux-2.6/commitdiff
hwmon: New driver for the VIA VT1211
authorJuerg Haefliger <juergh@gmail.com>
Sun, 24 Sep 2006 18:54:04 +0000 (20:54 +0200)
committerGreg Kroah-Hartman <gregkh@suse.de>
Thu, 28 Sep 2006 22:31:16 +0000 (15:31 -0700)
hwmon: New driver for the VIA VT1211

This is a new driver for the VIA VT1211 Super-IO chip. It is a rewrite
of the existing vt1211 driver (by Mark D. Studebaker and Lars Ekman)
which has been around for a while but never made it into the main
kernel tree.

It is implemented as a platform driver and therefore requires
lm_sensors 2.10.1 to function properly.

Signed-off-by: Juerg Haefliger <juergh@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
MAINTAINERS
drivers/hwmon/Kconfig
drivers/hwmon/Makefile
drivers/hwmon/vt1211.c [new file with mode: 0644]

index 63673e6513b717994de75ffb552f546f3c140ab8..332b220f8a23462b3c8930098a53c1354b7dec63 100644 (file)
@@ -3309,6 +3309,12 @@ W:       http://linuxtv.org
 T:     git kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb.git
 S:     Maintained
 
+VT1211 HARDWARE MONITOR DRIVER
+P:     Juerg Haefliger
+M:     juergh@gmail.com
+L:     lm-sensors@lm-sensors.org
+S:     Maintained
+
 VT8231 HARDWARE MONITOR DRIVER
 P:     Roger Lucas
 M:     roger@planbit.co.uk
index 696543ba6a29a8ae516c41d766d0145065000d2c..9b88b25b6edbdfb098dc189c1e54c0efb60e5b4b 100644 (file)
@@ -417,6 +417,17 @@ config SENSORS_VIA686A
          This driver can also be built as a module.  If so, the module
          will be called via686a.
 
+config SENSORS_VT1211
+       tristate "VIA VT1211"
+       depends on HWMON && EXPERIMENTAL
+       select HWMON_VID
+       help
+         If you say yes here then you get support for hardware monitoring
+         features of the VIA VT1211 Super-I/O chip.
+
+         This driver can also be built as a module.  If so, the module
+         will be called vt1211.
+
 config SENSORS_VT8231
        tristate "VIA VT8231"
        depends on HWMON && I2C && PCI && EXPERIMENTAL
index aab4c10630598e61aae81e802aac4a32e8db9621..af01cc64f7d265e31b7c9700f9c9eeefd596f43a 100644 (file)
@@ -46,6 +46,7 @@ obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o
 obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o
 obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o
 obj-$(CONFIG_SENSORS_VIA686A)  += via686a.o
+obj-$(CONFIG_SENSORS_VT1211)   += vt1211.o
 obj-$(CONFIG_SENSORS_VT8231)   += vt8231.o
 obj-$(CONFIG_SENSORS_W83627EHF)        += w83627ehf.o
 obj-$(CONFIG_SENSORS_W83L785TS)        += w83l785ts.o
diff --git a/drivers/hwmon/vt1211.c b/drivers/hwmon/vt1211.c
new file mode 100644 (file)
index 0000000..25cc560
--- /dev/null
@@ -0,0 +1,1355 @@
+/*
+ * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware
+ *            monitoring features
+ * Copyright (C) 2006 Juerg Haefliger <juergh@gmail.com>
+ *
+ * This driver is based on the driver for kernel 2.4 by Mark D. Studebaker
+ * and its port to kernel 2.6 by Lars Ekman.
+ *
+ * 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/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 <asm/io.h>
+
+static int uch_config = -1;
+module_param(uch_config, int, 0);
+MODULE_PARM_DESC(uch_config, "Initialize the universal channel configuration");
+
+static int int_mode = -1;
+module_param(int_mode, int, 0);
+MODULE_PARM_DESC(int_mode, "Force the temperature interrupt mode");
+
+static struct platform_device *pdev;
+
+#define DRVNAME "vt1211"
+
+/* ---------------------------------------------------------------------
+ * Registers
+ *
+ * The sensors are defined as follows.
+ *
+ * Sensor          Voltage Mode   Temp Mode   Notes (from the datasheet)
+ * --------        ------------   ---------   --------------------------
+ * Reading 1                      temp1       Intel thermal diode
+ * Reading 3                      temp2       Internal thermal diode
+ * UCH1/Reading2   in0            temp3       NTC type thermistor
+ * UCH2            in1            temp4       +2.5V
+ * UCH3            in2            temp5       VccP
+ * UCH4            in3            temp6       +5V
+ * UCH5            in4            temp7       +12V
+ * 3.3V            in5                        Internal VDD (+3.3V)
+ *
+ * --------------------------------------------------------------------- */
+
+/* Voltages (in) numbered 0-5 (ix) */
+#define VT1211_REG_IN(ix)              (0x21 + (ix))
+#define VT1211_REG_IN_MIN(ix)          ((ix) == 0 ? 0x3e : 0x2a + 2 * (ix))
+#define VT1211_REG_IN_MAX(ix)          ((ix) == 0 ? 0x3d : 0x29 + 2 * (ix))
+
+/* Temperatures (temp) numbered 0-6 (ix) */
+static u8 regtemp[]    = {0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25};
+static u8 regtempmax[] = {0x39, 0x1d, 0x3d, 0x2b, 0x2d, 0x2f, 0x31};
+static u8 regtemphyst[]        = {0x3a, 0x1e, 0x3e, 0x2c, 0x2e, 0x30, 0x32};
+
+/* Fans numbered 0-1 (ix) */
+#define VT1211_REG_FAN(ix)             (0x29 + (ix))
+#define VT1211_REG_FAN_MIN(ix)         (0x3b + (ix))
+#define VT1211_REG_FAN_DIV              0x47
+
+/* PWMs numbered 0-1 (ix) */
+/* Auto points numbered 0-3 (ap) */
+#define VT1211_REG_PWM(ix)             (0x60 + (ix))
+#define VT1211_REG_PWM_CLK              0x50
+#define VT1211_REG_PWM_CTL              0x51
+#define VT1211_REG_PWM_AUTO_TEMP(ap)   (0x55 - (ap))
+#define VT1211_REG_PWM_AUTO_PWM(ix, ap)        (0x58 + 2 * (ix) - (ap))
+
+/* Miscellaneous registers */
+#define VT1211_REG_CONFIG              0x40
+#define VT1211_REG_ALARM1              0x41
+#define VT1211_REG_ALARM2              0x42
+#define VT1211_REG_VID                 0x45
+#define VT1211_REG_UCH_CONFIG          0x4a
+#define VT1211_REG_TEMP1_CONFIG                0x4b
+#define VT1211_REG_TEMP2_CONFIG                0x4c
+
+/* In, temp & fan alarm bits */
+static const u8 bitalarmin[]   = {11, 0, 1, 3, 8, 2, 9};
+static const u8 bitalarmtemp[] = {4, 15, 11, 0, 1, 3, 8};
+static const u8 bitalarmfan[]  = {6, 7};
+
+/* ---------------------------------------------------------------------
+ * Data structures and manipulation thereof
+ * --------------------------------------------------------------------- */
+
+struct vt1211_data {
+       unsigned short addr;
+       const char *name;
+       struct class_device *class_dev;
+
+       struct mutex update_lock;
+       char valid;                     /* !=0 if following fields are valid */
+       unsigned long last_updated;     /* In jiffies */
+
+       /* Register values */
+       u8  in[6];
+       u8  in_max[6];
+       u8  in_min[6];
+       u8  temp[7];
+       u8  temp_max[7];
+       u8  temp_hyst[7];
+       u8  fan[2];
+       u8  fan_min[2];
+       u8  fan_div[2];
+       u8  fan_ctl;
+       u8  pwm[2];
+       u8  pwm_ctl[2];
+       u8  pwm_clk;
+       u8  pwm_auto_temp[4];
+       u8  pwm_auto_pwm[2][4];
+       u8  vid;                /* Read once at init time */
+       u8  vrm;
+       u8  uch_config;         /* Read once at init time */
+       u16 alarms;
+};
+
+/* ix = [0-5] */
+#define ISVOLT(ix, uch_config) ((ix) > 4 ? 1 : \
+                                !(((uch_config) >> ((ix) + 2)) & 1))
+
+/* ix = [0-6] */
+#define ISTEMP(ix, uch_config) ((ix) < 2 ? 1 : \
+                                ((uch_config) >> (ix)) & 1)
+
+/* in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the
+   driver according to the VT1211 BIOS porting guide */
+#define IN_FROM_REG(ix, reg)   ((reg) < 3 ? 0 : (ix) == 5 ? \
+                                (((reg) - 3) * 15882 + 479) / 958 : \
+                                (((reg) - 3) * 10000 + 479) / 958)
+#define IN_TO_REG(ix, val)     (SENSORS_LIMIT((ix) == 5 ? \
+                                ((val) * 958 + 7941) / 15882 + 3 : \
+                                ((val) * 958 + 5000) / 10000 + 3, 0, 255))
+
+/* temp1 (ix = 0) is an intel thermal diode which is scaled in user space.
+   temp2 (ix = 1) is the internal temp diode so it's scaled in the driver
+   according to some measurements that I took on an EPIA M10000.
+   temp3-7 are thermistor based so the driver returns the voltage measured at
+   the pin (range 0V - 2.2V). */
+#define TEMP_FROM_REG(ix, reg) ((ix) == 0 ? (reg) * 1000 : \
+                                (ix) == 1 ? (reg) < 51 ? 0 : \
+                                ((reg) - 51) * 1000 : \
+                                ((253 - (reg)) * 2200 + 105) / 210)
+#define TEMP_TO_REG(ix, val)   SENSORS_LIMIT( \
+                                ((ix) == 0 ? ((val) + 500) / 1000 : \
+                                 (ix) == 1 ? ((val) + 500) / 1000 + 51 : \
+                                 253 - ((val) * 210 + 1100) / 2200), 0, 255)
+
+#define DIV_FROM_REG(reg)      (1 << (reg))
+
+#define RPM_FROM_REG(reg, div) (((reg) == 0) || ((reg) == 255) ? 0 : \
+                                1310720 / (reg) / DIV_FROM_REG(div))
+#define RPM_TO_REG(val, div)   ((val) == 0 ? 255 : \
+                                SENSORS_LIMIT((1310720 / (val) / \
+                                DIV_FROM_REG(div)), 1, 254))
+
+/* ---------------------------------------------------------------------
+ * Super-I/O constants and functions
+ * --------------------------------------------------------------------- */
+
+/* Configuration & data index port registers */
+#define SIO_REG_CIP            0x2e
+#define SIO_REG_DIP            0x2f
+
+/* Configuration registers */
+#define SIO_VT1211_LDN         0x07    /* logical device number */
+#define SIO_VT1211_DEVID       0x20    /* device ID */
+#define SIO_VT1211_DEVREV      0x21    /* device revision */
+#define SIO_VT1211_ACTIVE      0x30    /* HW monitor active */
+#define SIO_VT1211_BADDR       0x60    /* base I/O address */
+#define SIO_VT1211_ID          0x3c    /* VT1211 device ID */
+
+/* VT1211 logical device numbers */
+#define SIO_VT1211_LDN_HWMON   0x0b    /* HW monitor */
+
+static inline void superio_outb(int reg, int val)
+{
+       outb(reg, SIO_REG_CIP);
+       outb(val, SIO_REG_DIP);
+}
+
+static inline int superio_inb(int reg)
+{
+       outb(reg, SIO_REG_CIP);
+       return inb(SIO_REG_DIP);
+}
+
+static inline void superio_select(int ldn)
+{
+       outb(SIO_VT1211_LDN, SIO_REG_CIP);
+       outb(ldn, SIO_REG_DIP);
+}
+
+static inline void superio_enter(void)
+{
+       outb(0x87, SIO_REG_CIP);
+       outb(0x87, SIO_REG_CIP);
+}
+
+static inline void superio_exit(void)
+{
+       outb(0xaa, SIO_REG_CIP);
+}
+
+/* ---------------------------------------------------------------------
+ * Device I/O access
+ * --------------------------------------------------------------------- */
+
+static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg)
+{
+       return inb(data->addr + reg);
+}
+
+static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val)
+{
+       outb(val, data->addr + reg);
+}
+
+static struct vt1211_data *vt1211_update_device(struct device *dev)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+       int ix, val;
+
+       mutex_lock(&data->update_lock);
+
+       /* registers cache is refreshed after 1 second */
+       if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+               /* read VID */
+               data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f;
+
+               /* voltage (in) registers */
+               for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
+                       if (ISVOLT(ix, data->uch_config)) {
+                               data->in[ix] = vt1211_read8(data,
+                                               VT1211_REG_IN(ix));
+                               data->in_min[ix] = vt1211_read8(data,
+                                               VT1211_REG_IN_MIN(ix));
+                               data->in_max[ix] = vt1211_read8(data,
+                                               VT1211_REG_IN_MAX(ix));
+                       }
+               }
+
+               /* temp registers */
+               for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
+                       if (ISTEMP(ix, data->uch_config)) {
+                               data->temp[ix] = vt1211_read8(data,
+                                               regtemp[ix]);
+                               data->temp_max[ix] = vt1211_read8(data,
+                                               regtempmax[ix]);
+                               data->temp_hyst[ix] = vt1211_read8(data,
+                                               regtemphyst[ix]);
+                       }
+               }
+
+               /* fan & pwm registers */
+               for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
+                       data->fan[ix] = vt1211_read8(data,
+                                               VT1211_REG_FAN(ix));
+                       data->fan_min[ix] = vt1211_read8(data,
+                                               VT1211_REG_FAN_MIN(ix));
+                       data->pwm[ix] = vt1211_read8(data,
+                                               VT1211_REG_PWM(ix));
+               }
+               val = vt1211_read8(data, VT1211_REG_FAN_DIV);
+               data->fan_div[0] = (val >> 4) & 3;
+               data->fan_div[1] = (val >> 6) & 3;
+               data->fan_ctl = val & 0xf;
+
+               val = vt1211_read8(data, VT1211_REG_PWM_CTL);
+               data->pwm_ctl[0] = val & 0xf;
+               data->pwm_ctl[1] = (val >> 4) & 0xf;
+
+               data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK);
+
+               /* pwm & temp auto point registers */
+               data->pwm_auto_pwm[0][1] = vt1211_read8(data,
+                                               VT1211_REG_PWM_AUTO_PWM(0, 1));
+               data->pwm_auto_pwm[0][2] = vt1211_read8(data,
+                                               VT1211_REG_PWM_AUTO_PWM(0, 2));
+               data->pwm_auto_pwm[1][1] = vt1211_read8(data,
+                                               VT1211_REG_PWM_AUTO_PWM(1, 1));
+               data->pwm_auto_pwm[1][2] = vt1211_read8(data,
+                                               VT1211_REG_PWM_AUTO_PWM(1, 2));
+               for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) {
+                       data->pwm_auto_temp[ix] = vt1211_read8(data,
+                                               VT1211_REG_PWM_AUTO_TEMP(ix));
+               }
+
+               /* alarm registers */
+               data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) |
+                               vt1211_read8(data, VT1211_REG_ALARM1);
+
+               data->last_updated = jiffies;
+               data->valid = 1;
+       }
+
+       mutex_unlock(&data->update_lock);
+
+       return data;
+}
+
+/* ---------------------------------------------------------------------
+ * Voltage sysfs interfaces
+ * ix = [0-5]
+ * --------------------------------------------------------------------- */
+
+#define SHOW_IN_INPUT  0
+#define SHOW_SET_IN_MIN        1
+#define SHOW_SET_IN_MAX        2
+#define SHOW_IN_ALARM  3
+
+static ssize_t show_in(struct device *dev, struct device_attribute *attr,
+                      char *buf)
+{
+       struct vt1211_data *data = vt1211_update_device(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int fn = sensor_attr_2->nr;
+       int res;
+
+       switch (fn) {
+       case SHOW_IN_INPUT:
+               res = IN_FROM_REG(ix, data->in[ix]);
+               break;
+       case SHOW_SET_IN_MIN:
+               res = IN_FROM_REG(ix, data->in_min[ix]);
+               break;
+       case SHOW_SET_IN_MAX:
+               res = IN_FROM_REG(ix, data->in_max[ix]);
+               break;
+       case SHOW_IN_ALARM:
+               res = (data->alarms >> bitalarmin[ix]) & 1;
+               break;
+       default:
+               res = 0;
+               dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
+       }
+
+       return sprintf(buf, "%d\n", res);
+}
+
+static ssize_t set_in(struct device *dev, struct device_attribute *attr,
+                     const char *buf, size_t count)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int fn = sensor_attr_2->nr;
+       long val = simple_strtol(buf, NULL, 10);
+
+       mutex_lock(&data->update_lock);
+       switch (fn) {
+       case SHOW_SET_IN_MIN:
+               data->in_min[ix] = IN_TO_REG(ix, val);
+               vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]);
+               break;
+       case SHOW_SET_IN_MAX:
+               data->in_max[ix] = IN_TO_REG(ix, val);
+               vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]);
+               break;
+       default:
+               dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
+       }
+       mutex_unlock(&data->update_lock);
+
+       return count;
+}
+
+/* ---------------------------------------------------------------------
+ * Temperature sysfs interfaces
+ * ix = [0-6]
+ * --------------------------------------------------------------------- */
+
+#define SHOW_TEMP_INPUT                0
+#define SHOW_SET_TEMP_MAX      1
+#define SHOW_SET_TEMP_MAX_HYST 2
+#define SHOW_TEMP_ALARM                3
+
+static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
+                        char *buf)
+{
+       struct vt1211_data *data = vt1211_update_device(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int fn = sensor_attr_2->nr;
+       int res;
+
+       switch (fn) {
+       case SHOW_TEMP_INPUT:
+               res = TEMP_FROM_REG(ix, data->temp[ix]);
+               break;
+       case SHOW_SET_TEMP_MAX:
+               res = TEMP_FROM_REG(ix, data->temp_max[ix]);
+               break;
+       case SHOW_SET_TEMP_MAX_HYST:
+               res = TEMP_FROM_REG(ix, data->temp_hyst[ix]);
+               break;
+       case SHOW_TEMP_ALARM:
+               res = (data->alarms >> bitalarmtemp[ix]) & 1;
+               break;
+       default:
+               res = 0;
+               dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
+       }
+
+       return sprintf(buf, "%d\n", res);
+}
+
+static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
+                       const char *buf, size_t count)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int fn = sensor_attr_2->nr;
+       long val = simple_strtol(buf, NULL, 10);
+
+       mutex_lock(&data->update_lock);
+       switch (fn) {
+       case SHOW_SET_TEMP_MAX:
+               data->temp_max[ix] = TEMP_TO_REG(ix, val);
+               vt1211_write8(data, regtempmax[ix],
+                             data->temp_max[ix]);
+               break;
+       case SHOW_SET_TEMP_MAX_HYST:
+               data->temp_hyst[ix] = TEMP_TO_REG(ix, val);
+               vt1211_write8(data, regtemphyst[ix],
+                             data->temp_hyst[ix]);
+               break;
+       default:
+               dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
+       }
+       mutex_unlock(&data->update_lock);
+
+       return count;
+}
+
+/* ---------------------------------------------------------------------
+ * Fan sysfs interfaces
+ * ix = [0-1]
+ * --------------------------------------------------------------------- */
+
+#define SHOW_FAN_INPUT         0
+#define SHOW_SET_FAN_MIN       1
+#define SHOW_SET_FAN_DIV       2
+#define SHOW_FAN_ALARM         3
+
+static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
+                       char *buf)
+{
+       struct vt1211_data *data = vt1211_update_device(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int fn = sensor_attr_2->nr;
+       int res;
+
+       switch (fn) {
+       case SHOW_FAN_INPUT:
+               res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]);
+               break;
+       case SHOW_SET_FAN_MIN:
+               res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]);
+               break;
+       case SHOW_SET_FAN_DIV:
+               res = DIV_FROM_REG(data->fan_div[ix]);
+               break;
+       case SHOW_FAN_ALARM:
+               res = (data->alarms >> bitalarmfan[ix]) & 1;
+               break;
+       default:
+               res = 0;
+               dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
+       }
+
+       return sprintf(buf, "%d\n", res);
+}
+
+static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
+                      const char *buf, size_t count)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int fn = sensor_attr_2->nr;
+       long val = simple_strtol(buf, NULL, 10);
+       int reg;
+
+       mutex_lock(&data->update_lock);
+
+       /* sync the data cache */
+       reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
+       data->fan_div[0] = (reg >> 4) & 3;
+       data->fan_div[1] = (reg >> 6) & 3;
+       data->fan_ctl = reg & 0xf;
+
+       switch (fn) {
+       case SHOW_SET_FAN_MIN:
+               data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]);
+               vt1211_write8(data, VT1211_REG_FAN_MIN(ix),
+                             data->fan_min[ix]);
+               break;
+       case SHOW_SET_FAN_DIV:
+               switch (val) {
+                       case 1: data->fan_div[ix] = 0; break;
+                       case 2: data->fan_div[ix] = 1; break;
+                       case 4: data->fan_div[ix] = 2; break;
+                       case 8: data->fan_div[ix] = 3; break;
+                       default:
+                               count = -EINVAL;
+                               dev_warn(dev, "fan div value %ld not "
+                                        "supported. Choose one of 1, 2, "
+                                        "4, or 8.\n", val);
+                               goto EXIT;
+               }
+               vt1211_write8(data, VT1211_REG_FAN_DIV,
+                             ((data->fan_div[1] << 6) |
+                              (data->fan_div[0] << 4) |
+                               data->fan_ctl));
+               break;
+       default:
+               dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
+       }
+
+EXIT:
+       mutex_unlock(&data->update_lock);
+       return count;
+}
+
+/* ---------------------------------------------------------------------
+ * PWM sysfs interfaces
+ * ix = [0-1]
+ * --------------------------------------------------------------------- */
+
+#define SHOW_PWM                       0
+#define SHOW_SET_PWM_ENABLE            1
+#define SHOW_SET_PWM_FREQ              2
+#define SHOW_SET_PWM_AUTO_CHANNELS_TEMP        3
+
+static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
+                       char *buf)
+{
+       struct vt1211_data *data = vt1211_update_device(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int fn = sensor_attr_2->nr;
+       int res;
+
+       switch (fn) {
+       case SHOW_PWM:
+               res = data->pwm[ix];
+               break;
+       case SHOW_SET_PWM_ENABLE:
+               res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
+               break;
+       case SHOW_SET_PWM_FREQ:
+               res = 90000 >> (data->pwm_clk & 7);
+               break;
+       case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
+               res = (data->pwm_ctl[ix] & 7) + 1;
+               break;
+       default:
+               res = 0;
+               dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
+       }
+
+       return sprintf(buf, "%d\n", res);
+}
+
+static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
+                      const char *buf, size_t count)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int fn = sensor_attr_2->nr;
+       long val = simple_strtol(buf, NULL, 10);
+       int tmp, reg;
+
+       mutex_lock(&data->update_lock);
+
+       switch (fn) {
+       case SHOW_SET_PWM_ENABLE:
+               /* sync the data cache */
+               reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
+               data->fan_div[0] = (reg >> 4) & 3;
+               data->fan_div[1] = (reg >> 6) & 3;
+               data->fan_ctl = reg & 0xf;
+               reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
+               data->pwm_ctl[0] = reg & 0xf;
+               data->pwm_ctl[1] = (reg >> 4) & 0xf;
+               switch (val) {
+               case 0:
+                       data->pwm_ctl[ix] &= 7;
+                       /* disable SmartGuardian if both PWM outputs are
+                        * disabled */
+                       if ((data->pwm_ctl[ix ^ 1] & 1) == 0) {
+                               data->fan_ctl &= 0xe;
+                       }
+                       break;
+               case 2:
+                       data->pwm_ctl[ix] |= 8;
+                       data->fan_ctl |= 1;
+                       break;
+               default:
+                       count = -EINVAL;
+                       dev_warn(dev, "pwm mode %ld not supported. "
+                                "Choose one of 0 or 2.\n", val);
+                       goto EXIT;
+               }
+               vt1211_write8(data, VT1211_REG_PWM_CTL,
+                             ((data->pwm_ctl[1] << 4) |
+                               data->pwm_ctl[0]));
+               vt1211_write8(data, VT1211_REG_FAN_DIV,
+                             ((data->fan_div[1] << 6) |
+                              (data->fan_div[0] << 4) |
+                               data->fan_ctl));
+               break;
+       case SHOW_SET_PWM_FREQ:
+               val = 135000 / SENSORS_LIMIT(val, 135000 >> 7, 135000);
+               /* calculate tmp = log2(val) */
+               tmp = 0;
+               for (val >>= 1; val > 0; val >>= 1) {
+                       tmp++;
+               }
+               /* sync the data cache */
+               reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
+               data->pwm_clk = (reg & 0xf8) | tmp;
+               vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
+               break;
+       case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
+               if ((val < 1) || (val > 7)) {
+                       count = -EINVAL;
+                       dev_warn(dev, "temp channel %ld not supported. "
+                                "Choose a value between 1 and 7.\n", val);
+                       goto EXIT;
+               }
+               if (!ISTEMP(val - 1, data->uch_config)) {
+                       count = -EINVAL;
+                       dev_warn(dev, "temp channel %ld is not available.\n",
+                                val);
+                       goto EXIT;
+               }
+               /* sync the data cache */
+               reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
+               data->pwm_ctl[0] = reg & 0xf;
+               data->pwm_ctl[1] = (reg >> 4) & 0xf;
+               data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
+               vt1211_write8(data, VT1211_REG_PWM_CTL,
+                             ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
+               break;
+       default:
+               dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
+       }
+
+EXIT:
+       mutex_unlock(&data->update_lock);
+       return count;
+}
+
+/* ---------------------------------------------------------------------
+ * PWM auto point definitions
+ * ix = [0-1]
+ * ap = [0-3]
+ * --------------------------------------------------------------------- */
+
+/*
+ * pwm[ix+1]_auto_point[ap+1]_temp mapping table:
+ * Note that there is only a single set of temp auto points that controls both
+ * PWM controllers. We still create 2 sets of sysfs files to make it look
+ * more consistent even though they map to the same registers.
+ *
+ * ix ap : description
+ * -------------------
+ * 0  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
+ * 0  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
+ * 0  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
+ * 0  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
+ * 1  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
+ * 1  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
+ * 1  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
+ * 1  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
+ */
+
+static ssize_t show_pwm_auto_point_temp(struct device *dev,
+                                       struct device_attribute *attr,
+                                       char *buf)
+{
+       struct vt1211_data *data = vt1211_update_device(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int ap = sensor_attr_2->nr;
+
+       return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
+                      data->pwm_auto_temp[ap]));
+}
+
+static ssize_t set_pwm_auto_point_temp(struct device *dev,
+                                      struct device_attribute *attr,
+                                      const char *buf, size_t count)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int ap = sensor_attr_2->nr;
+       long val = simple_strtol(buf, NULL, 10);
+       int reg;
+
+       mutex_lock(&data->update_lock);
+
+       /* sync the data cache */
+       reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
+       data->pwm_ctl[0] = reg & 0xf;
+       data->pwm_ctl[1] = (reg >> 4) & 0xf;
+
+       data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
+       vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
+                     data->pwm_auto_temp[ap]);
+       mutex_unlock(&data->update_lock);
+
+       return count;
+}
+
+/*
+ * pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
+ * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
+ * be changed.
+ *
+ * ix ap : description
+ * -------------------
+ * 0  0  : pwm1 off                   (pwm_auto_pwm[0][0], hard-wired to 0)
+ * 0  1  : pwm1 low speed duty cycle  (pwm_auto_pwm[0][1])
+ * 0  2  : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
+ * 0  3  : pwm1 full speed            (pwm_auto_pwm[0][3], hard-wired to 255)
+ * 1  0  : pwm2 off                   (pwm_auto_pwm[1][0], hard-wired to 0)
+ * 1  1  : pwm2 low speed duty cycle  (pwm_auto_pwm[1][1])
+ * 1  2  : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
+ * 1  3  : pwm2 full speed            (pwm_auto_pwm[1][3], hard-wired to 255)
+*/
+
+static ssize_t show_pwm_auto_point_pwm(struct device *dev,
+                                      struct device_attribute *attr,
+                                      char *buf)
+{
+       struct vt1211_data *data = vt1211_update_device(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int ap = sensor_attr_2->nr;
+
+       return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
+}
+
+static ssize_t set_pwm_auto_point_pwm(struct device *dev,
+                                     struct device_attribute *attr,
+                                     const char *buf, size_t count)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+       struct sensor_device_attribute_2 *sensor_attr_2 =
+                                               to_sensor_dev_attr_2(attr);
+       int ix = sensor_attr_2->index;
+       int ap = sensor_attr_2->nr;
+       long val = simple_strtol(buf, NULL, 10);
+
+       if ((val < 0) || (val > 255)) {
+               dev_err(dev, "pwm value %ld is out of range. "
+                       "Choose a value between 0 and 255." , val);
+               return -EINVAL;
+       }
+
+       mutex_lock(&data->update_lock);
+       data->pwm_auto_pwm[ix][ap] = val;
+       vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
+                     data->pwm_auto_pwm[ix][ap]);
+       mutex_unlock(&data->update_lock);
+
+       return count;
+}
+
+/* ---------------------------------------------------------------------
+ * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
+ * --------------------------------------------------------------------- */
+
+static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
+                       char *buf)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+
+       return sprintf(buf, "%d\n", data->vrm);
+}
+
+static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
+                      const char *buf, size_t count)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+       long val = simple_strtol(buf, NULL, 10);
+
+       data->vrm = val;
+
+       return count;
+}
+
+static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
+                       char *buf)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+
+       return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
+}
+
+static ssize_t show_name(struct device *dev,
+                        struct device_attribute *attr, char *buf)
+{
+       struct vt1211_data *data = dev_get_drvdata(dev);
+
+       return sprintf(buf, "%s\n", data->name);
+}
+
+static ssize_t show_alarms(struct device *dev,
+                          struct device_attribute *attr, char *buf)
+{
+       struct vt1211_data *data = vt1211_update_device(dev);
+
+       return sprintf(buf, "%d\n", data->alarms);
+}
+
+/* ---------------------------------------------------------------------
+ * Device attribute structs
+ * --------------------------------------------------------------------- */
+
+#define SENSOR_ATTR_IN_INPUT(ix) \
+       SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
+               show_in, NULL, SHOW_IN_INPUT, ix)
+
+static struct sensor_device_attribute_2 vt1211_sysfs_in_input[] = {
+       SENSOR_ATTR_IN_INPUT(0),
+       SENSOR_ATTR_IN_INPUT(1),
+       SENSOR_ATTR_IN_INPUT(2),
+       SENSOR_ATTR_IN_INPUT(3),
+       SENSOR_ATTR_IN_INPUT(4),
+       SENSOR_ATTR_IN_INPUT(5),
+};
+
+#define SENSOR_ATTR_IN_MIN(ix) \
+       SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
+               show_in, set_in, SHOW_SET_IN_MIN, ix)
+
+static struct sensor_device_attribute_2 vt1211_sysfs_in_min[] = {
+       SENSOR_ATTR_IN_MIN(0),
+       SENSOR_ATTR_IN_MIN(1),
+       SENSOR_ATTR_IN_MIN(2),
+       SENSOR_ATTR_IN_MIN(3),
+       SENSOR_ATTR_IN_MIN(4),
+       SENSOR_ATTR_IN_MIN(5),
+};
+
+#define SENSOR_ATTR_IN_MAX(ix) \
+       SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
+               show_in, set_in, SHOW_SET_IN_MAX, ix)
+
+static struct sensor_device_attribute_2 vt1211_sysfs_in_max[] = {
+       SENSOR_ATTR_IN_MAX(0),
+       SENSOR_ATTR_IN_MAX(1),
+       SENSOR_ATTR_IN_MAX(2),
+       SENSOR_ATTR_IN_MAX(3),
+       SENSOR_ATTR_IN_MAX(4),
+       SENSOR_ATTR_IN_MAX(5),
+};
+
+#define SENSOR_ATTR_IN_ALARM(ix) \
+       SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
+               show_in, NULL, SHOW_IN_ALARM, ix)
+
+static struct sensor_device_attribute_2 vt1211_sysfs_in_alarm[] = {
+       SENSOR_ATTR_IN_ALARM(0),
+       SENSOR_ATTR_IN_ALARM(1),
+       SENSOR_ATTR_IN_ALARM(2),
+       SENSOR_ATTR_IN_ALARM(3),
+       SENSOR_ATTR_IN_ALARM(4),
+       SENSOR_ATTR_IN_ALARM(5),
+};
+
+#define SENSOR_ATTR_TEMP_INPUT(ix) \
+       SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
+               show_temp, NULL, SHOW_TEMP_INPUT, ix-1)
+
+static struct sensor_device_attribute_2 vt1211_sysfs_temp_input[] = {
+       SENSOR_ATTR_TEMP_INPUT(1),
+       SENSOR_ATTR_TEMP_INPUT(2),
+       SENSOR_ATTR_TEMP_INPUT(3),
+       SENSOR_ATTR_TEMP_INPUT(4),
+       SENSOR_ATTR_TEMP_INPUT(5),
+       SENSOR_ATTR_TEMP_INPUT(6),
+       SENSOR_ATTR_TEMP_INPUT(7),
+};
+
+#define SENSOR_ATTR_TEMP_MAX(ix) \
+       SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
+               show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1)
+
+static struct sensor_device_attribute_2 vt1211_sysfs_temp_max[] = {
+       SENSOR_ATTR_TEMP_MAX(1),
+       SENSOR_ATTR_TEMP_MAX(2),
+       SENSOR_ATTR_TEMP_MAX(3),
+       SENSOR_ATTR_TEMP_MAX(4),
+       SENSOR_ATTR_TEMP_MAX(5),
+       SENSOR_ATTR_TEMP_MAX(6),
+       SENSOR_ATTR_TEMP_MAX(7),
+};
+
+#define SENSOR_ATTR_TEMP_MAX_HYST(ix) \
+       SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
+               show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1)
+
+static struct sensor_device_attribute_2 vt1211_sysfs_temp_max_hyst[] = {
+       SENSOR_ATTR_TEMP_MAX_HYST(1),
+       SENSOR_ATTR_TEMP_MAX_HYST(2),
+       SENSOR_ATTR_TEMP_MAX_HYST(3),
+       SENSOR_ATTR_TEMP_MAX_HYST(4),
+       SENSOR_ATTR_TEMP_MAX_HYST(5),
+       SENSOR_ATTR_TEMP_MAX_HYST(6),
+       SENSOR_ATTR_TEMP_MAX_HYST(7),
+};
+
+#define SENSOR_ATTR_TEMP_ALARM(ix) \
+       SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
+               show_temp, NULL, SHOW_TEMP_ALARM, ix-1)
+
+static struct sensor_device_attribute_2 vt1211_sysfs_temp_alarm[] = {
+       SENSOR_ATTR_TEMP_ALARM(1),
+       SENSOR_ATTR_TEMP_ALARM(2),
+       SENSOR_ATTR_TEMP_ALARM(3),
+       SENSOR_ATTR_TEMP_ALARM(4),
+       SENSOR_ATTR_TEMP_ALARM(5),
+       SENSOR_ATTR_TEMP_ALARM(6),
+       SENSOR_ATTR_TEMP_ALARM(7),
+};
+
+#define SENSOR_ATTR_FAN(ix) \
+       SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
+               show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
+       SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
+               show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
+       SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
+               show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
+       SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
+               show_fan, NULL, SHOW_FAN_ALARM, ix-1)
+
+#define SENSOR_ATTR_PWM(ix) \
+       SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
+               show_pwm, NULL, SHOW_PWM, ix-1), \
+       SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
+               show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
+       SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
+               show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)
+
+#define SENSOR_ATTR_PWM_FREQ(ix) \
+       SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
+               show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)
+
+#define SENSOR_ATTR_PWM_FREQ_RO(ix) \
+       SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
+               show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)
+
+#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
+       SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
+               show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
+               ap-1, ix-1)
+
+#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
+       SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
+               show_pwm_auto_point_temp, NULL, \
+               ap-1, ix-1)
+
+#define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
+       SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
+               show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
+               ap-1, ix-1)
+
+#define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
+       SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
+               show_pwm_auto_point_pwm, NULL, \
+               ap-1, ix-1)
+
+static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
+       SENSOR_ATTR_FAN(1),
+       SENSOR_ATTR_FAN(2),
+       SENSOR_ATTR_PWM(1),
+       SENSOR_ATTR_PWM(2),
+       SENSOR_ATTR_PWM_FREQ(1),
+       SENSOR_ATTR_PWM_FREQ_RO(2),
+       SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
+       SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
+       SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
+       SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
+       SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
+       SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
+       SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
+       SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
+       SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
+       SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
+       SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
+       SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
+       SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
+       SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
+       SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
+       SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
+};
+
+static struct device_attribute vt1211_sysfs_misc[] = {
+       __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
+       __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
+       __ATTR(name, S_IRUGO, show_name, NULL),
+       __ATTR(alarms, S_IRUGO, show_alarms, NULL),
+};
+
+/* ---------------------------------------------------------------------
+ * Device registration and initialization
+ * --------------------------------------------------------------------- */
+
+static void __devinit vt1211_init_device(struct vt1211_data *data)
+{
+       /* set VRM */
+       data->vrm = vid_which_vrm();
+
+       /* Read (and initialize) UCH config */
+       data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
+       if (uch_config > -1) {
+               data->uch_config = (data->uch_config & 0x83) |
+                                  (uch_config << 2);
+               vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
+       }
+
+       /* Initialize the interrupt mode (if request at module load time).
+        * The VT1211 implements 3 different modes for clearing interrupts:
+        * 0: Clear INT when status register is read. Regenerate INT as long
+        *    as temp stays above hysteresis limit.
+        * 1: Clear INT when status register is read. DON'T regenerate INT
+        *    until temp falls below hysteresis limit and exceeds hot limit
+        *    again.
+        * 2: Clear INT when temp falls below max limit.
+        *
+        * The driver only allows to force mode 0 since that's the only one
+        * that makes sense for 'sensors' */
+       if (int_mode == 0) {
+               vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
+               vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
+       }
+
+       /* Fill in some hard wired values into our data struct */
+       data->pwm_auto_pwm[0][3] = 255;
+       data->pwm_auto_pwm[1][3] = 255;
+}
+
+static void vt1211_remove_sysfs(struct platform_device *pdev)
+{
+       struct device *dev = &pdev->dev;
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) {
+               device_remove_file(dev,
+                       &vt1211_sysfs_in_input[i].dev_attr);
+               device_remove_file(dev,
+                       &vt1211_sysfs_in_min[i].dev_attr);
+               device_remove_file(dev,
+                       &vt1211_sysfs_in_max[i].dev_attr);
+               device_remove_file(dev,
+                       &vt1211_sysfs_in_alarm[i].dev_attr);
+       }
+       for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) {
+               device_remove_file(dev,
+                       &vt1211_sysfs_temp_input[i].dev_attr);
+               device_remove_file(dev,
+                       &vt1211_sysfs_temp_max[i].dev_attr);
+               device_remove_file(dev,
+                       &vt1211_sysfs_temp_max_hyst[i].dev_attr);
+               device_remove_file(dev,
+                       &vt1211_sysfs_temp_alarm[i].dev_attr);
+       }
+       for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
+               device_remove_file(dev,
+                       &vt1211_sysfs_fan_pwm[i].dev_attr);
+       }
+       for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
+               device_remove_file(dev, &vt1211_sysfs_misc[i]);
+       }
+}
+
+static int __devinit vt1211_probe(struct platform_device *pdev)
+{
+       struct device *dev = &pdev->dev;
+       struct vt1211_data *data;
+       struct resource *res;
+       int i, err;
+
+       if (!(data = kzalloc(sizeof(struct vt1211_data), GFP_KERNEL))) {
+               err = -ENOMEM;
+               dev_err(dev, "Out of memory\n");
+               goto EXIT;
+       }
+
+       res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+       data->addr = res->start;
+       data->name = DRVNAME;
+       mutex_init(&data->update_lock);
+
+       platform_set_drvdata(pdev, data);
+
+       /* Initialize the VT1211 chip */
+       vt1211_init_device(data);
+
+       /* Create sysfs interface files */
+       for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) {
+               if (ISVOLT(i, data->uch_config)) {
+                       if ((err = device_create_file(dev,
+                               &vt1211_sysfs_in_input[i].dev_attr)) ||
+                           (err = device_create_file(dev,
+                               &vt1211_sysfs_in_min[i].dev_attr)) ||
+                           (err = device_create_file(dev,
+                               &vt1211_sysfs_in_max[i].dev_attr)) ||
+                           (err = device_create_file(dev,
+                               &vt1211_sysfs_in_alarm[i].dev_attr))) {
+                               goto EXIT_DEV_REMOVE;
+                       }
+               }
+       }
+       for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) {
+               if (ISTEMP(i, data->uch_config)) {
+                       if ((err = device_create_file(dev,
+                               &vt1211_sysfs_temp_input[i].dev_attr)) ||
+                           (err = device_create_file(dev,
+                               &vt1211_sysfs_temp_max[i].dev_attr)) ||
+                           (err = device_create_file(dev,
+                               &vt1211_sysfs_temp_max_hyst[i].dev_attr)) ||
+                           (err = device_create_file(dev,
+                               &vt1211_sysfs_temp_alarm[i].dev_attr))) {
+                               goto EXIT_DEV_REMOVE;
+                       }
+               }
+       }
+       for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
+               err = device_create_file(dev,
+                       &vt1211_sysfs_fan_pwm[i].dev_attr);
+               if (err) {
+                       goto EXIT_DEV_REMOVE;
+               }
+       }
+       for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
+               err = device_create_file(dev,
+                      &vt1211_sysfs_misc[i]);
+               if (err) {
+                       goto EXIT_DEV_REMOVE;
+               }
+       }
+
+       /* Register device */
+       data->class_dev = hwmon_device_register(dev);
+       if (IS_ERR(data->class_dev)) {
+               err = PTR_ERR(data->class_dev);
+               dev_err(dev, "Class registration failed (%d)\n", err);
+               goto EXIT_DEV_REMOVE_SILENT;
+       }
+
+       return 0;
+
+EXIT_DEV_REMOVE:
+       dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
+EXIT_DEV_REMOVE_SILENT:
+       vt1211_remove_sysfs(pdev);
+       platform_set_drvdata(pdev, NULL);
+       kfree(data);
+EXIT:
+       return err;
+}
+
+static int __devexit vt1211_remove(struct platform_device *pdev)
+{
+       struct vt1211_data *data = platform_get_drvdata(pdev);
+
+       hwmon_device_unregister(data->class_dev);
+       vt1211_remove_sysfs(pdev);
+       platform_set_drvdata(pdev, NULL);
+       kfree(data);
+
+       return 0;
+}
+
+static struct platform_driver vt1211_driver = {
+       .driver = {
+               .owner = THIS_MODULE,
+               .name  = DRVNAME,
+       },
+       .probe  = vt1211_probe,
+       .remove = __devexit_p(vt1211_remove),
+};
+
+static int __init vt1211_device_add(unsigned short address)
+{
+       struct resource res = {
+               .start  = address,
+               .end    = address + 0x7f,
+               .flags  = IORESOURCE_IO,
+       };
+       int err;
+
+       pdev = platform_device_alloc(DRVNAME, address);
+       if (!pdev) {
+               err = -ENOMEM;
+               printk(KERN_ERR DRVNAME ": Device allocation failed (%d)\n",
+                      err);
+               goto EXIT;
+       }
+
+       res.name = pdev->name;
+       err = platform_device_add_resources(pdev, &res, 1);
+       if (err) {
+               printk(KERN_ERR DRVNAME ": Device resource addition failed "
+                      "(%d)\n", err);
+               goto EXIT_DEV_PUT;
+       }
+
+       err = platform_device_add(pdev);
+       if (err) {
+               printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
+                      err);
+               goto EXIT_DEV_PUT;
+       }
+
+       return 0;
+
+EXIT_DEV_PUT:
+       platform_device_put(pdev);
+EXIT:
+       return err;
+}
+
+static int __init vt1211_find(unsigned short *address)
+{
+       int err = -ENODEV;
+
+       superio_enter();
+
+       if (superio_inb(SIO_VT1211_DEVID) != SIO_VT1211_ID) {
+               goto EXIT;
+       }
+
+       superio_select(SIO_VT1211_LDN_HWMON);
+
+       if ((superio_inb(SIO_VT1211_ACTIVE) & 1) == 0) {
+               printk(KERN_WARNING DRVNAME ": HW monitor is disabled, "
+                      "skipping\n");
+               goto EXIT;
+       }
+
+       *address = ((superio_inb(SIO_VT1211_BADDR) << 8) |
+                   (superio_inb(SIO_VT1211_BADDR + 1))) & 0xff00;
+       if (*address == 0) {
+               printk(KERN_WARNING DRVNAME ": Base address is not set, "
+                      "skipping\n");
+               goto EXIT;
+       }
+
+       err = 0;
+       printk(KERN_INFO DRVNAME ": Found VT1211 chip at 0x%04x, "
+              "revision %u\n", *address, superio_inb(SIO_VT1211_DEVREV));
+
+EXIT:
+       superio_exit();
+       return err;
+}
+
+static int __init vt1211_init(void)
+{
+       int err;
+       unsigned short address = 0;
+
+       err = vt1211_find(&address);
+       if (err) {
+               goto EXIT;
+       }
+
+       if ((uch_config < -1) || (uch_config > 31)) {
+               err = -EINVAL;
+               printk(KERN_WARNING DRVNAME ": Invalid UCH configuration %d. "
+                      "Choose a value between 0 and 31.\n", uch_config);
+         goto EXIT;
+       }
+
+       if ((int_mode < -1) || (int_mode > 0)) {
+               err = -EINVAL;
+               printk(KERN_WARNING DRVNAME ": Invalid interrupt mode %d. "
+                      "Only mode 0 is supported.\n", int_mode);
+         goto EXIT;
+       }
+
+       err = platform_driver_register(&vt1211_driver);
+       if (err) {
+               goto EXIT;
+       }
+
+       /* Sets global pdev as a side effect */
+       err = vt1211_device_add(address);
+       if (err) {
+               goto EXIT_DRV_UNREGISTER;
+       }
+
+       return 0;
+
+EXIT_DRV_UNREGISTER:
+       platform_driver_unregister(&vt1211_driver);
+EXIT:
+       return err;
+}
+
+static void __exit vt1211_exit(void)
+{
+       platform_device_unregister(pdev);
+       platform_driver_unregister(&vt1211_driver);
+}
+
+MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
+MODULE_DESCRIPTION("VT1211 sensors");
+MODULE_LICENSE("GPL");
+
+module_init(vt1211_init);
+module_exit(vt1211_exit);