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gem5/arm/linux/917e007a4150d26a0a/./drivers/hwmon/vt1211.c
blob: 3a6bfa51cb94f69cb8323ee69f32c88c62360575 [file]
/*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/ioport.h>
#include <linux/acpi.h>
#include <linux/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 unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");
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 device *hwmon_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) (clamp_val((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) clamp_val( \
((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 : \
clamp_val((1310720 / (val) / \
DIV_FROM_REG(div)), 1, 254))
/* ---------------------------------------------------------------------
* Super-I/O constants and functions
* --------------------------------------------------------------------- */
/*
* Configuration index port registers
* The vt1211 can live at 2 different addresses so we need to probe both
*/
#define SIO_REG_CIP1 0x2e
#define SIO_REG_CIP2 0x4e
/* 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 sio_cip, int reg, int val)
{
outb(reg, sio_cip);
outb(val, sio_cip + 1);
}
static inline int superio_inb(int sio_cip, int reg)
{
outb(reg, sio_cip);
return inb(sio_cip + 1);
}
static inline void superio_select(int sio_cip, int ldn)
{
outb(SIO_VT1211_LDN, sio_cip);
outb(ldn, sio_cip + 1);
}
static inline void superio_enter(int sio_cip)
{
outb(0x87, sio_cip);
outb(0x87, sio_cip);
}
static inline void superio_exit(int sio_cip)
{
outb(0xaa, sio_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;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
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;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
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;
int reg;
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
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;
int tmp, reg;
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
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 / clamp_val(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;
int reg;
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
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;
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->pwm_auto_pwm[ix][ap] = clamp_val(val, 0, 255);
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);
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err)
return err;
if (val > 255)
return -EINVAL;
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(ix) \
{ SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
show_in, NULL, SHOW_IN_INPUT, ix), \
SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
show_in, set_in, SHOW_SET_IN_MIN, ix), \
SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
show_in, set_in, SHOW_SET_IN_MAX, 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[][4] = {
SENSOR_ATTR_IN(0),
SENSOR_ATTR_IN(1),
SENSOR_ATTR_IN(2),
SENSOR_ATTR_IN(3),
SENSOR_ATTR_IN(4),
SENSOR_ATTR_IN(5)
};
#define IN_UNIT_ATTRS(X) \
{ &vt1211_sysfs_in[X][0].dev_attr.attr, \
&vt1211_sysfs_in[X][1].dev_attr.attr, \
&vt1211_sysfs_in[X][2].dev_attr.attr, \
&vt1211_sysfs_in[X][3].dev_attr.attr, \
NULL \
}
static struct attribute *vt1211_in_attr[][5] = {
IN_UNIT_ATTRS(0),
IN_UNIT_ATTRS(1),
IN_UNIT_ATTRS(2),
IN_UNIT_ATTRS(3),
IN_UNIT_ATTRS(4),
IN_UNIT_ATTRS(5)
};
static const struct attribute_group vt1211_in_attr_group[] = {
{ .attrs = vt1211_in_attr[0] },
{ .attrs = vt1211_in_attr[1] },
{ .attrs = vt1211_in_attr[2] },
{ .attrs = vt1211_in_attr[3] },
{ .attrs = vt1211_in_attr[4] },
{ .attrs = vt1211_in_attr[5] }
};
#define SENSOR_ATTR_TEMP(ix) \
{ SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
show_temp, NULL, SHOW_TEMP_INPUT, ix-1), \
SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1), \
SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1), \
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[][4] = {
SENSOR_ATTR_TEMP(1),
SENSOR_ATTR_TEMP(2),
SENSOR_ATTR_TEMP(3),
SENSOR_ATTR_TEMP(4),
SENSOR_ATTR_TEMP(5),
SENSOR_ATTR_TEMP(6),
SENSOR_ATTR_TEMP(7),
};
#define TEMP_UNIT_ATTRS(X) \
{ &vt1211_sysfs_temp[X][0].dev_attr.attr, \
&vt1211_sysfs_temp[X][1].dev_attr.attr, \
&vt1211_sysfs_temp[X][2].dev_attr.attr, \
&vt1211_sysfs_temp[X][3].dev_attr.attr, \
NULL \
}
static struct attribute *vt1211_temp_attr[][5] = {
TEMP_UNIT_ATTRS(0),
TEMP_UNIT_ATTRS(1),
TEMP_UNIT_ATTRS(2),
TEMP_UNIT_ATTRS(3),
TEMP_UNIT_ATTRS(4),
TEMP_UNIT_ATTRS(5),
TEMP_UNIT_ATTRS(6)
};
static const struct attribute_group vt1211_temp_attr_group[] = {
{ .attrs = vt1211_temp_attr[0] },
{ .attrs = vt1211_temp_attr[1] },
{ .attrs = vt1211_temp_attr[2] },
{ .attrs = vt1211_temp_attr[3] },
{ .attrs = vt1211_temp_attr[4] },
{ .attrs = vt1211_temp_attr[5] },
{ .attrs = vt1211_temp_attr[6] }
};
#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 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_in_attr_group); i++)
sysfs_remove_group(&dev->kobj, &vt1211_in_attr_group[i]);
for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++)
sysfs_remove_group(&dev->kobj, &vt1211_temp_attr_group[i]);
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 vt1211_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct vt1211_data *data;
struct resource *res;
int i, err;
data = devm_kzalloc(dev, sizeof(struct vt1211_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!devm_request_region(dev, res->start, resource_size(res),
DRVNAME)) {
dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
(unsigned long)res->start, (unsigned long)res->end);
return -EBUSY;
}
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_in_attr_group); i++) {
if (ISVOLT(i, data->uch_config)) {
err = sysfs_create_group(&dev->kobj,
&vt1211_in_attr_group[i]);
if (err)
goto EXIT_DEV_REMOVE;
}
}
for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) {
if (ISTEMP(i, data->uch_config)) {
err = sysfs_create_group(&dev->kobj,
&vt1211_temp_attr_group[i]);
if (err)
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->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_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);
return err;
}
static int vt1211_remove(struct platform_device *pdev)
{
struct vt1211_data *data = platform_get_drvdata(pdev);
hwmon_device_unregister(data->hwmon_dev);
vt1211_remove_sysfs(pdev);
return 0;
}
static struct platform_driver vt1211_driver = {
.driver = {
.name = DRVNAME,
},
.probe = vt1211_probe,
.remove = 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;
pr_err("Device allocation failed (%d)\n", err);
goto EXIT;
}
res.name = pdev->name;
err = acpi_check_resource_conflict(&res);
if (err)
goto EXIT_DEV_PUT;
err = platform_device_add_resources(pdev, &res, 1);
if (err) {
pr_err("Device resource addition failed (%d)\n", err);
goto EXIT_DEV_PUT;
}
err = platform_device_add(pdev);
if (err) {
pr_err("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(int sio_cip, unsigned short *address)
{
int err = -ENODEV;
int devid;
superio_enter(sio_cip);
devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
if (devid != SIO_VT1211_ID)
goto EXIT;
superio_select(sio_cip, SIO_VT1211_LDN_HWMON);
if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
pr_warn("HW monitor is disabled, skipping\n");
goto EXIT;
}
*address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
(superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
if (*address == 0) {
pr_warn("Base address is not set, skipping\n");
goto EXIT;
}
err = 0;
pr_info("Found VT1211 chip at 0x%04x, revision %u\n",
*address, superio_inb(sio_cip, SIO_VT1211_DEVREV));
EXIT:
superio_exit(sio_cip);
return err;
}
static int __init vt1211_init(void)
{
int err;
unsigned short address = 0;
err = vt1211_find(SIO_REG_CIP1, &address);
if (err) {
err = vt1211_find(SIO_REG_CIP2, &address);
if (err)
goto EXIT;
}
if ((uch_config < -1) || (uch_config > 31)) {
err = -EINVAL;
pr_warn("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;
pr_warn("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);