Skip to content

L
linux-davinci
Commit 9dc5801b authored by 's avatar Committed by James Toy
Browse files
Options

Signed-off-by: <tomaz.mertelj@guest.arnes.si> 

Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 94ba7bad
Hide whitespace changes
Inline Side-by-side
Showing with 1149 additions and 0 deletions
Documentation/hwmon/amc6821 0 → 100644
View file @ 9dc5801b
Kernel driver amc6821
=====================
Supported chips:
Prefix: 'amc6821'
Addresses scanned: 0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e, 0x4c, 0x4d, 0x4e
Datasheet: http://focus.ti.com/docs/prod/folders/print/amc6821.html
Authors:
Tomaz Mertelj <tomaz.mertelj@guest.arnes.si>
Description
-----------
This driver implements support for the Texas Instruments amc6821 chip.
The chip has one on-chip and one remote temperature sensor and one pwm fan
regulator.
The pwm can be controlled either from software or automatically.
The driver provides the following sensor accesses in sysfs:
temp1_input ro on-chip temperature
temp1_min rw "
temp1_max rw "
temp1_crit rw "
temp1_min_alarm ro "
temp1_max_alarm ro "
temp1_crit_alarm ro "
temp2_input ro remote temperature
temp2_min rw "
temp2_max rw "
temp2_crit rw "
temp2_min_alarm ro "
temp2_max_alarm ro "
temp2_crit_alarm ro "
temp2_fault ro "
fan1_input ro tachometer speed
fan1_min rw "
fan1_max rw "
fan1_fault ro "
fan1_div rw Fan divisor can be either 2 or 4.
pwm1 rw pwm1
pwm1_enable rw regulator mode, 1=open loop, 2=fan controlled
by remote temperature, 3=fan controlled by
combination of on-chip temperature and
remote-sensor temperature,
pwm1_auto_channels_temp ro 1 if pwm_enable==2, 3 if pwm_enable==3
pwm1_auto_point1_pwm ro Hardwired to 0, shared for both
temperature channels.
pwm1_auto_point2_pwm rw This value, shared for both temperature
channels.
pwm1_auto_point3_pwm rw Hardwired to 255, shared for both
temperature channels.
temp1_auto_point1_temp ro Hardwired to temp2_auto_point1_temp
which is rw. Below this temperature fan stops.
temp1_auto_point2_temp rw The low-temperature limit of the proportional
range. Below this temperature
pwm1 = pwm1_auto_point2_pwm. It can go from
0 degree C and 124 degree C in steps of
4 degree C. Read it out after writing to get
actual value.
temp1_auto_point3_temp rw Above this temperature fan runs at maximum
speed. It can go from temp1_auto_point2_temp.
It can only have certain discrete values
which depend on temp1_auto_point2_temp and
pwm1_auto_point2_pwm. Read it out after
writing to get the actual value.
temp2_auto_point1_temp rw Must be between 0 degree C and 63 degree C and
it defines passive cooling temperature.
Below this temperature the fan stops in
the closed loop mode.
temp2_auto_point2_temp rw The low-temperature limit of the proportional
range. Below this temperature
pwm1 = pwm1_auto_point2_pwm. It can go from
0 degree C and 124 degree C in steps
of 4 degree C.
temp2_auto_point3_temp rw Above this temperature fan runs at maximum
speed. It can only have certain discrete
values which depend on temp2_auto_point2_temp
and pwm1_auto_point2_pwm. Read it out after
writing to get actual value.
Module parameters
-----------------
If your board has a BIOS that initializes the amc6821 correctly, you should
load the module with: init=0.
If your board BIOS doesn't initialize the chip, or you want
different settings, you can set the following parameters:
init=1,
pwminv: 0 default pwm output, 1 inverts pwm output.
drivers/hwmon/Kconfig
View file @ 9dc5801b
......@@ -794,6 +794,16 @@ config SENSORS_ADS7828
This driver can also be built as a module. If so, the module
will be called ads7828.
config SENSORS_AMC6821
tristate "Texas Instruments AMC6821"
depends on I2C && EXPERIMENTAL
help
If you say yes here you get support for the Texas Instruments
AMC6821 hardware monitoring chips.
This driver can also be build as a module. If so, the module
will be called amc6821.
config SENSORS_THMC50
tristate "Texas Instruments THMC50 / Analog Devices ADM1022"
depends on I2C && EXPERIMENTAL
......
drivers/hwmon/Makefile
View file @ 9dc5801b
......@@ -82,6 +82,7 @@ obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o
obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o
obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o
obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o
obj-$(CONFIG_SENSORS_AMC6821) += amc6821.o
obj-$(CONFIG_SENSORS_THMC50) += thmc50.o
obj-$(CONFIG_SENSORS_TMP401) += tmp401.o
obj-$(CONFIG_SENSORS_TMP421) += tmp421.o
......
drivers/hwmon/amc6821.c 0 → 100644
View file @ 9dc5801b
/*
amc6821.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring
Copyright (C) 2009 T. Mertelj <tomaz.mertelj@guest.arnes.si>
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/kernel.h> /* Needed for KERN_INFO */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
/*
* Addresses to scan.
*/
static const unsigned short normal_i2c[] = {0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e,
0x4c, 0x4d, 0x4e, I2C_CLIENT_END};
/*
* Insmod parameters
*/
static int pwminv = 0; /*Inverted PWM output. */
module_param(pwminv, int, S_IRUGO);
static int init = 1; /*Power-on initialization.*/
module_param(init, int, S_IRUGO);
I2C_CLIENT_INSMOD_1(amc6821);
#define AMC6821_REG_DEV_ID 0x3D
#define AMC6821_REG_COMP_ID 0x3E
#define AMC6821_REG_CONF1 0x00
#define AMC6821_REG_CONF2 0x01
#define AMC6821_REG_CONF3 0x3F
#define AMC6821_REG_CONF4 0x04
#define AMC6821_REG_STAT1 0x02
#define AMC6821_REG_STAT2 0x03
#define AMC6821_REG_TDATA_LOW 0x08
#define AMC6821_REG_TDATA_HI 0x09
#define AMC6821_REG_LTEMP_HI 0x0A
#define AMC6821_REG_RTEMP_HI 0x0B
#define AMC6821_REG_LTEMP_LIMIT_MIN 0x15
#define AMC6821_REG_LTEMP_LIMIT_MAX 0x14
#define AMC6821_REG_RTEMP_LIMIT_MIN 0x19
#define AMC6821_REG_RTEMP_LIMIT_MAX 0x18
#define AMC6821_REG_LTEMP_CRIT 0x1B
#define AMC6821_REG_RTEMP_CRIT 0x1D
#define AMC6821_REG_PSV_TEMP 0x1C
#define AMC6821_REG_DCY 0x22
#define AMC6821_REG_LTEMP_FAN_CTRL 0x24
#define AMC6821_REG_RTEMP_FAN_CTRL 0x25
#define AMC6821_REG_DCY_LOW_TEMP 0x21
#define AMC6821_REG_TACH_LLIMITL 0x10
#define AMC6821_REG_TACH_LLIMITH 0x11
#define AMC6821_REG_TACH_HLIMITL 0x12
#define AMC6821_REG_TACH_HLIMITH 0x13
#define AMC6821_CONF1_START 0x01
#define AMC6821_CONF1_FAN_INT_EN 0x02
#define AMC6821_CONF1_FANIE 0x04
#define AMC6821_CONF1_PWMINV 0x08
#define AMC6821_CONF1_FAN_FAULT_EN 0x10
#define AMC6821_CONF1_FDRC0 0x20
#define AMC6821_CONF1_FDRC1 0x40
#define AMC6821_CONF1_THERMOVIE 0x80
#define AMC6821_CONF2_PWM_EN 0x01
#define AMC6821_CONF2_TACH_MODE 0x02
#define AMC6821_CONF2_TACH_EN 0x04
#define AMC6821_CONF2_RTFIE 0x08
#define AMC6821_CONF2_LTOIE 0x10
#define AMC6821_CONF2_RTOIE 0x20
#define AMC6821_CONF2_PSVIE 0x40
#define AMC6821_CONF2_RST 0x80
#define AMC6821_CONF3_THERM_FAN_EN 0x80
#define AMC6821_CONF3_REV_MASK 0x0F
#define AMC6821_CONF4_OVREN 0x10
#define AMC6821_CONF4_TACH_FAST 0x20
#define AMC6821_CONF4_PSPR 0x40
#define AMC6821_CONF4_MODE 0x80
#define AMC6821_STAT1_RPM_ALARM 0x01
#define AMC6821_STAT1_FANS 0x02
#define AMC6821_STAT1_RTH 0x04
#define AMC6821_STAT1_RTL 0x08
#define AMC6821_STAT1_R_THERM 0x10
#define AMC6821_STAT1_RTF 0x20
#define AMC6821_STAT1_LTH 0x40
#define AMC6821_STAT1_LTL 0x80
#define AMC6821_STAT2_RTC 0x08
#define AMC6821_STAT2_LTC 0x10
#define AMC6821_STAT2_LPSV 0x20
#define AMC6821_STAT2_L_THERM 0x40
#define AMC6821_STAT2_THERM_IN 0x80
static int amc6821_probe(
struct i2c_client *client,
const struct i2c_device_id *id);
static int amc6821_detect(
struct i2c_client *client,
int kind,
struct i2c_board_info *info);
static int amc6821_init_client(struct i2c_client *client);
static int amc6821_remove(struct i2c_client *client);
static struct amc6821_data *amc6821_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
static const struct i2c_device_id amc6821_id[] = {
{ "amc6821", amc6821 },
{ }
};
MODULE_DEVICE_TABLE(i2c, amc6821_id);
static struct i2c_driver amc6821_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "amc6821",
},
.probe = amc6821_probe,
.remove = amc6821_remove,
.id_table = amc6821_id,
.detect = amc6821_detect,
.address_data = &addr_data,
};
/*
* Client data (each client gets its own)
*/
struct amc6821_data {
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
/* register values */
int temp1_input;
int temp1_min;
int temp1_max;
int temp1_crit;
int temp2_input;
int temp2_min;
int temp2_max;
int temp2_crit;
u16 fan1_input;
u16 fan1_min;
u16 fan1_max;
u8 fan1_div;
u8 pwm1;
u8 temp1_auto_point_temp[3];
u8 temp2_auto_point_temp[3];
u8 pwm1_auto_point_pwm[3];
u8 pwm1_enable;
u8 pwm1_auto_channels_temp;
u8 stat1;
u8 stat2;
};
#define get_temp_para(name) \
static ssize_t get_##name(\
struct device *dev,\
struct device_attribute *devattr,\
char *buf)\
{\
struct amc6821_data *data = amc6821_update_device(dev);\
return sprintf(buf, "%d\n", data->name * 1000);\
}
get_temp_para(temp1_input);
get_temp_para(temp1_min);
get_temp_para(temp1_max);
get_temp_para(temp2_input);
get_temp_para(temp2_min);
get_temp_para(temp2_max);
get_temp_para(temp1_crit);
get_temp_para(temp2_crit);
#define set_temp_para(name, reg)\
static ssize_t set_##name(\
struct device *dev,\
struct device_attribute *attr,\
const char *buf,\
size_t count)\
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct amc6821_data *data = i2c_get_clientdata(client); \
int val = simple_strtol(buf, NULL, 10); \
\
mutex_lock(&data->update_lock); \
data->name = SENSORS_LIMIT(val / 1000, -128, 127); \
if (i2c_smbus_write_byte_data(client, reg, data->name)) {\
dev_err(&client->dev, "Register write error, aborting.\n");\
count = -EIO;\
} \
mutex_unlock(&data->update_lock); \
return count; \
}
set_temp_para(temp1_min, AMC6821_REG_LTEMP_LIMIT_MIN);
set_temp_para(temp1_max, AMC6821_REG_LTEMP_LIMIT_MAX);
set_temp_para(temp2_min, AMC6821_REG_RTEMP_LIMIT_MIN);
set_temp_para(temp2_max, AMC6821_REG_RTEMP_LIMIT_MAX);
set_temp_para(temp1_crit, AMC6821_REG_LTEMP_CRIT);
set_temp_para(temp2_crit, AMC6821_REG_RTEMP_CRIT);
#define get_temp_alarm(name, reg, mask)\
static ssize_t get_##name(\
struct device *dev, \
struct device_attribute *devattr,\
char *buf)\
{\
struct amc6821_data *data = amc6821_update_device(dev);\
if (data->reg & mask)\
return sprintf(buf, "1");\
else \
return sprintf(buf, "0");\
} \
get_temp_alarm(temp1_min_alarm, stat1, AMC6821_STAT1_LTL)
get_temp_alarm(temp1_max_alarm, stat1, AMC6821_STAT1_LTH)
get_temp_alarm(temp2_min_alarm, stat1, AMC6821_STAT1_RTL)
get_temp_alarm(temp2_max_alarm, stat1, AMC6821_STAT1_RTH)
get_temp_alarm(temp1_crit_alarm, stat2, AMC6821_STAT2_LTC)
get_temp_alarm(temp2_crit_alarm, stat2, AMC6821_STAT2_RTC)
static ssize_t get_temp2_fault(
struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct amc6821_data *data = amc6821_update_device(dev);
if (data->stat1 & AMC6821_STAT1_RTF)
return sprintf(buf, "1");
else
return sprintf(buf, "0");
}
static ssize_t get_pwm1(
struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct amc6821_data *data = amc6821_update_device(dev);
return sprintf(buf, "%d\n", data->pwm1);
}
static ssize_t set_pwm1(
struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct amc6821_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->pwm1 = SENSORS_LIMIT(val , 0, 255);
i2c_smbus_write_byte_data(client, AMC6821_REG_DCY, data->pwm1);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t get_pwm1_enable(
struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct amc6821_data *data = amc6821_update_device(dev);
return sprintf(buf, "%d\n", data->pwm1_enable);
}
static ssize_t set_pwm1_enable(
struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct amc6821_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
int config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
if (config < 0) {
dev_err(&client->dev,
"Error reading configuration register, aborting.\n");
return -EIO;
}
switch (val) {
case 1:
config &= ~AMC6821_CONF1_FDRC0;
config &= ~AMC6821_CONF1_FDRC1;
break;
case 2:
config &= ~AMC6821_CONF1_FDRC0;
config |= AMC6821_CONF1_FDRC1;
break;
case 3:
config |= AMC6821_CONF1_FDRC0;
config |= AMC6821_CONF1_FDRC1;
break;
default:
return -EINVAL;
}
mutex_lock(&data->update_lock);
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF1, config)) {
dev_err(&client->dev,
"Configuration register write error, aborting.\n");
count = -EIO;
}
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t get_pwm1_auto_channels_temp(
struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct amc6821_data *data = amc6821_update_device(dev);
return sprintf(buf, "%d\n", data->pwm1_auto_channels_temp);
}
#define get_auto_point(name)\
static ssize_t get_##name(\
struct device *dev,\
struct device_attribute *devattr,\
char *buf)\
{\
int nr = to_sensor_dev_attr(devattr)->index;\
struct amc6821_data *data = amc6821_update_device(dev);\
return sprintf(buf, "%d\n", data->name[nr] * 1000);\
}
get_auto_point(temp1_auto_point_temp);
get_auto_point(temp2_auto_point_temp);
static ssize_t get_pwm1_auto_point_pwm(
struct device *dev,
struct device_attribute *devattr,
char *buf)
{
int nr = to_sensor_dev_attr(devattr)->index;
struct amc6821_data *data = amc6821_update_device(dev);
return sprintf(buf, "%d\n", data->pwm1_auto_point_pwm[nr]);
}
#define set_temp_auto_point_temp(name, reg)\
static ssize_t set_##name(\
struct device *dev,\
struct device_attribute *attr,\
const char *buf,\
size_t count)\
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct amc6821_data *data = amc6821_update_device(dev);\
int nr = to_sensor_dev_attr(attr)->index;\
int val = simple_strtol(buf, NULL, 10); \
u8 tmp;\
int dt;\
int dpwm;\
\
mutex_lock(&data->update_lock); \
switch (nr) {\
case 0:\
data->name[0] = SENSORS_LIMIT(val / 1000, 0,\
data->temp1_auto_point_temp[1]);\
data->name[0] = SENSORS_LIMIT(data->name[0], 0,\
data->temp2_auto_point_temp[1]);\
data->name[0] = SENSORS_LIMIT(data->name[0], 0, 63); \
data->valid = 0;\
if (i2c_smbus_write_byte_data(\
client,\
AMC6821_REG_PSV_TEMP,\
data->name[0])) {\
dev_err(&client->dev,\
"Register write error, aborting.\n");\
count = -EIO;\
} \
goto EXIT;\
break;\
case 1:\
data->name[1] = SENSORS_LIMIT(\
val / 1000,\
(data->name[0] & 0x7C) + 4,\
124);\
data->name[1] &= 0x7C;\
data->name[2] = SENSORS_LIMIT(\
data->name[2], data->name[1] + 1,\
255);\
break;\
case 2:\
data->name[2] = SENSORS_LIMIT(\
val / 1000,\
data->name[1]+1,\
255); \
break;\
} \
dt = data->name[2]-data->name[1];\
dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1];\
for (tmp = 4; tmp > 0; tmp--) {\
if (dt * (0x20 >> tmp) >= dpwm)\
break;\
} \
tmp |= (data->name[1] & 0x7C) << 1;\
if (i2c_smbus_write_byte_data(client, reg, tmp)) {\
dev_err(&client->dev, "Register write error, aborting.\n");\
count = -EIO;\
} \
data->valid = 0;\
EXIT:\
mutex_unlock(&data->update_lock); \
return count; \
}
set_temp_auto_point_temp(temp1_auto_point_temp, AMC6821_REG_LTEMP_FAN_CTRL);
set_temp_auto_point_temp(temp2_auto_point_temp, AMC6821_REG_RTEMP_FAN_CTRL);
static ssize_t set_pwm1_auto_point_pwm(
struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct amc6821_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
u8 tmp;
int dt;
int dpwm;
mutex_lock(&data->update_lock);
data->pwm1_auto_point_pwm[1] = SENSORS_LIMIT(val, 0, 254);
if (i2c_smbus_write_byte_data(client, AMC6821_REG_DCY_LOW_TEMP,
data->pwm1_auto_point_pwm[1])) {
dev_err(&client->dev, "Register write error, aborting.\n");
count = -EIO;
}
dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1];
dt = data->temp1_auto_point_temp[2]-data->temp1_auto_point_temp[1];
for (tmp = 4; tmp > 0; tmp--) {
if (dt * (0x20 >> tmp) >= dpwm)
break;
}
tmp |= (data->temp1_auto_point_temp[1] & 0x7C) << 1;
if (i2c_smbus_write_byte_data(client,
AMC6821_REG_LTEMP_FAN_CTRL, tmp)) {
dev_err(&client->dev, "Register write error, aborting.\n");
count = -EIO;
}
dt = data->temp2_auto_point_temp[2]-data->temp2_auto_point_temp[1];
for (tmp = 4; tmp > 0; tmp--) {
if (dt * (0x20 >> tmp) >= dpwm)
break;
}
tmp |= (data->temp2_auto_point_temp[1] & 0x7C) << 1;
if (i2c_smbus_write_byte_data(client,
AMC6821_REG_RTEMP_FAN_CTRL, tmp)) {
dev_err(&client->dev, "Register write error, aborting.\n");
count = -EIO;
}
data->valid = 0;
mutex_unlock(&data->update_lock);
return count;
}
#define get_fan_para(name) static ssize_t get_##name(\
struct device *dev,\
struct device_attribute *devattr,\
char *buf)\
{ \
struct amc6821_data *data = amc6821_update_device(dev); \
if (0 == data->name)\
return sprintf(buf, "0");\
return sprintf(buf, "%d\n", (int)(6000000 / data->name)); \
}
get_fan_para(fan1_input);
get_fan_para(fan1_min);
get_fan_para(fan1_max);
static ssize_t get_fan1_fault(
struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct amc6821_data *data = amc6821_update_device(dev);
if (data->stat1 & AMC6821_STAT1_FANS)
return sprintf(buf, "1");
else
return sprintf(buf, "0");
}
#define set_fan_para(name, reg) \
static ssize_t set_##name(\
struct device *dev,\
struct device_attribute *attr,\
const char *buf, size_t count)\
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct amc6821_data *data = i2c_get_clientdata(client); \
int val = simple_strtol(buf, NULL, 10); \
val = 1 > val ? 0xFFFF : 6000000/val; \
\
mutex_lock(&data->update_lock); \
data->name = (u16) SENSORS_LIMIT(val, 1, 0xFFFF); \
if (i2c_smbus_write_byte_data(client, reg, data->name & 0xFF)) { \
dev_err(&client->dev, "Register write error, aborting.\n");\
count = -EIO;\
} \
if (i2c_smbus_write_byte_data(client, reg+1, data->name >> 8)) { \
dev_err(&client->dev, "Register write error, aborting.\n");\
count = -EIO;\
} \
mutex_unlock(&data->update_lock); \
return count; \
}
set_fan_para(fan1_min, AMC6821_REG_TACH_LLIMITL);
set_fan_para(fan1_max, AMC6821_REG_TACH_HLIMITL);
static ssize_t get_fan1_div(
struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct amc6821_data *data = amc6821_update_device(dev);
return sprintf(buf, "%d\n", data->fan1_div);
}
static ssize_t set_fan1_div(
struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct amc6821_data *data = i2c_get_clientdata(client);
int val = simple_strtol(buf, NULL, 10);
int config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4);
if (config < 0) {
dev_err(&client->dev,
"Error reading configuration register, aborting.\n");
return -EIO;
}
mutex_lock(&data->update_lock);
switch (val) {
case 2:
config &= ~AMC6821_CONF4_PSPR;
data->fan1_div = 2;
break;
case 4:
config |= AMC6821_CONF4_PSPR;
data->fan1_div = 4;
break;
default:
mutex_unlock(&data->update_lock);
return -EINVAL;
}
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, config)) {
dev_err(&client->dev,
"Configuration register write error, aborting.\n");
count = -EIO;
}
mutex_unlock(&data->update_lock);
return count;
}
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp1_input, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, get_temp1_min,
set_temp1_min, 0);
static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, get_temp1_max,
set_temp1_max, 0);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR, get_temp1_crit,
set_temp1_crit, 0);
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO,
get_temp1_min_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
get_temp1_max_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
get_temp1_crit_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO | S_IWUSR,
get_temp2_input, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR, get_temp2_min,
set_temp2_min, 0);
static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, get_temp2_max,
set_temp2_max, 0);
static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO | S_IWUSR, get_temp2_crit,
set_temp2_crit, 0);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO,
get_temp2_fault, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO,
get_temp2_min_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO,
get_temp2_max_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO,
get_temp2_crit_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan1_input, NULL, 0);
static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
get_fan1_min, set_fan1_min, 0);
static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO | S_IWUSR,
get_fan1_max, set_fan1_max, 0);
static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, get_fan1_fault, NULL, 0);
static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
get_fan1_div, set_fan1_div, 0);
static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, get_pwm1, set_pwm1, 0);
static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
get_pwm1_enable, set_pwm1_enable, 0);
static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IRUGO,
get_pwm1_auto_point_pwm, NULL, 0);
static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
get_pwm1_auto_point_pwm, set_pwm1_auto_point_pwm, 1);
static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IRUGO,
get_pwm1_auto_point_pwm, NULL, 2);
static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO,
get_pwm1_auto_channels_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IRUGO,
get_temp1_auto_point_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
get_temp1_auto_point_temp, set_temp1_auto_point_temp, 1);
static SENSOR_DEVICE_ATTR(temp1_auto_point3_temp, S_IWUSR | S_IRUGO,
get_temp1_auto_point_temp, set_temp1_auto_point_temp, 2);
static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
get_temp2_auto_point_temp, set_temp2_auto_point_temp, 0);
static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
get_temp2_auto_point_temp, set_temp2_auto_point_temp, 1);
static SENSOR_DEVICE_ATTR(temp2_auto_point3_temp, S_IWUSR | S_IRUGO,
get_temp2_auto_point_temp, set_temp2_auto_point_temp, 2);
static struct attribute *amc6821_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp2_crit.dev_attr.attr,
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan1_min.dev_attr.attr,
&sensor_dev_attr_fan1_max.dev_attr.attr,
&sensor_dev_attr_fan1_fault.dev_attr.attr,
&sensor_dev_attr_fan1_div.dev_attr.attr,
&sensor_dev_attr_pwm1.dev_attr.attr,
&sensor_dev_attr_pwm1_enable.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
&sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_temp1_auto_point3_temp.dev_attr.attr,
&sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_temp2_auto_point3_temp.dev_attr.attr,
NULL
};
static struct attribute_group amc6821_attr_grp = {
.attrs = amc6821_attrs,
};
/* Return 0 if detection is successful, -ENODEV otherwise */
static int amc6821_detect(
struct i2c_client *client,
int kind,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
int address = client->addr;
dev_dbg(&adapter->dev, "amc6821_detect called, kind = %d\n", kind);
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_dbg(&adapter->dev,
"max6650: I2C bus doesn't support byte read mode, skipping.\n");
return -ENODEV;
}
if ((kind < 0) &&
((i2c_smbus_read_byte_data(client, AMC6821_REG_DEV_ID) &
0xDE) ||
(i2c_smbus_read_byte_data(client, AMC6821_REG_COMP_ID) &
0xB6))) {
dev_dbg(&adapter->dev,
"amc6821: detection failed at 0x%02x.\n",
address);
return -ENODEV;
}
dev_info(&adapter->dev, "amc6821: chip found at 0x%02x.\n", address);
strlcpy(info->type, "amc6821", I2C_NAME_SIZE);
return 0;
}
static int amc6821_probe(
struct i2c_client *client,
const struct i2c_device_id *id)
{
struct amc6821_data *data;
int err;
data = kzalloc(sizeof(struct amc6821_data), GFP_KERNEL);
if (!data) {
dev_err(&client->dev, "out of memory.\n");
return -ENOMEM;
}
i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
/*
* Initialize the amc6821 chip
*/
err = amc6821_init_client(client);
if (err)
goto err_free;
err = sysfs_create_group(&client->dev.kobj, &amc6821_attr_grp);
if (err)
goto err_free;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (!IS_ERR(data->hwmon_dev))
return 0;
err = PTR_ERR(data->hwmon_dev);
dev_err(&client->dev, "error registering hwmon device.\n");
sysfs_remove_group(&client->dev.kobj, &amc6821_attr_grp);
err_free:
kfree(data);
return err;
}
static int amc6821_remove(struct i2c_client *client)
{
struct amc6821_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &amc6821_attr_grp);
kfree(data);
return 0;
}
static int amc6821_init_client(struct i2c_client *client)
{
int config;
int err = -EIO;
if (init) {
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4);
if (config < 0) {
dev_err(&client->dev,
"Error reading configuration register, aborting.\n");
return err;
}
config |= AMC6821_CONF4_MODE;
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4,
config)) {
dev_err(&client->dev,
"Configuration register write error, aborting.\n");
return err;
}
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF3);
if (config < 0) {
dev_err(&client->dev,
"Error reading configuration register, aborting.\n");
return err;
}
config &= ~AMC6821_CONF3_THERM_FAN_EN;
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF3,
config)) {
dev_err(&client->dev,
"Configuration register write error, aborting.\n");
return err;
}
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF2);
if (config < 0) {
dev_err(&client->dev,
"Error reading configuration register, aborting.\n");
return err;
}
config &= ~AMC6821_CONF2_RTFIE;
config &= ~AMC6821_CONF2_LTOIE;
config &= ~AMC6821_CONF2_RTOIE;
if (i2c_smbus_write_byte_data(client,
AMC6821_REG_CONF2, config)) {
dev_err(&client->dev,
"Configuration register write error, aborting.\n");
return err;
}
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
if (config < 0) {
dev_err(&client->dev,
"Error reading configuration register, aborting.\n");
return err;
}
config &= ~AMC6821_CONF1_THERMOVIE;
config &= ~AMC6821_CONF1_FANIE;
config |= AMC6821_CONF1_START;
if (pwminv)
config |= AMC6821_CONF1_PWMINV;
else
config &= ~AMC6821_CONF1_PWMINV;
if (i2c_smbus_write_byte_data(
client, AMC6821_REG_CONF1, config)) {
dev_err(&client->dev,
"Configuration register write error, aborting.\n");
return err;
}
}
return 0;
}
static struct amc6821_data *amc6821_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct amc6821_data *data = i2c_get_clientdata(client);
int timeout = HZ;
u8 reg;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + timeout) ||
!data->valid) {
data->temp1_input = i2c_smbus_read_byte_data(client,
AMC6821_REG_LTEMP_HI);
data->temp1_min = i2c_smbus_read_byte_data(client,
AMC6821_REG_LTEMP_LIMIT_MIN);
data->temp1_max = i2c_smbus_read_byte_data(client,
AMC6821_REG_LTEMP_LIMIT_MAX);
data->temp1_crit = i2c_smbus_read_byte_data(client,
AMC6821_REG_LTEMP_CRIT);
data->temp2_input = i2c_smbus_read_byte_data(client,
AMC6821_REG_RTEMP_HI);
data->temp2_min = i2c_smbus_read_byte_data(client,
AMC6821_REG_RTEMP_LIMIT_MIN);
data->temp2_max = i2c_smbus_read_byte_data(client,
AMC6821_REG_RTEMP_LIMIT_MAX);
data->temp2_crit = i2c_smbus_read_byte_data(client,
AMC6821_REG_RTEMP_CRIT);
data->stat1 = i2c_smbus_read_byte_data(client,
AMC6821_REG_STAT1);
data->stat2 = i2c_smbus_read_byte_data(client,
AMC6821_REG_STAT2);
data->pwm1 = i2c_smbus_read_byte_data(client,
AMC6821_REG_DCY);
data->fan1_input = i2c_smbus_read_byte_data(client,
AMC6821_REG_TDATA_LOW);
data->fan1_input += i2c_smbus_read_byte_data(client,
AMC6821_REG_TDATA_HI) << 8;
data->fan1_min = i2c_smbus_read_byte_data(client,
AMC6821_REG_TACH_LLIMITL);
data->fan1_min += i2c_smbus_read_byte_data(client,
AMC6821_REG_TACH_LLIMITL+1) << 8;
data->fan1_max = i2c_smbus_read_byte_data(client,
AMC6821_REG_TACH_HLIMITL);
data->fan1_max += i2c_smbus_read_byte_data(client,
AMC6821_REG_TACH_HLIMITL+1) << 8;
data->fan1_div = i2c_smbus_read_byte_data(client,
AMC6821_REG_CONF4);
data->fan1_div = data->fan1_div & AMC6821_CONF4_PSPR ? 4 : 2;
data->pwm1_auto_point_pwm[0] = 0;
data->pwm1_auto_point_pwm[2] = 255;
data->pwm1_auto_point_pwm[1] = i2c_smbus_read_byte_data(client,
AMC6821_REG_DCY_LOW_TEMP);
data->temp1_auto_point_temp[0] =
i2c_smbus_read_byte_data(client,
AMC6821_REG_PSV_TEMP);
data->temp2_auto_point_temp[0] =
data->temp1_auto_point_temp[0];
reg = i2c_smbus_read_byte_data(client,
AMC6821_REG_LTEMP_FAN_CTRL);
data->temp1_auto_point_temp[1] = (reg & 0xF8) >> 1;
reg &= 0x07;
reg = 0x20 >> reg;
if (reg > 0)
data->temp1_auto_point_temp[2] =
data->temp1_auto_point_temp[1] +
(data->pwm1_auto_point_pwm[2] -
data->pwm1_auto_point_pwm[1]) / reg;
else
data->temp1_auto_point_temp[2] = 255;
reg = i2c_smbus_read_byte_data(client,
AMC6821_REG_RTEMP_FAN_CTRL);
data->temp2_auto_point_temp[1] = (reg & 0xF8) >> 1;
reg &= 0x07;
reg = 0x20 >> reg;
if (reg > 0)
data->temp2_auto_point_temp[2] =
data->temp2_auto_point_temp[1] +
(data->pwm1_auto_point_pwm[2] -
data->pwm1_auto_point_pwm[1]) / reg;
else
data->temp2_auto_point_temp[2] = 255;
reg = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
reg = (reg >> 5) & 0x3;
switch (reg) {
case 0: /*open loop: software sets pwm1*/
data->pwm1_auto_channels_temp = 0;
data->pwm1_enable = 1;
break;
case 2: /*closed loop: remote T (temp2)*/
data->pwm1_auto_channels_temp = 2;
data->pwm1_enable = 2;
break;
case 3: /*closed loop: local and remote T (temp2)*/
data->pwm1_auto_channels_temp = 3;
data->pwm1_enable = 3;
break;
case 1: /*semi-open loop: software sets rpm, chip controls pwm1,
*currently not implemented
*/
data->pwm1_auto_channels_temp = 0;
data->pwm1_enable = 0;
break;
}
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static int __init amc6821_init(void)
{
return i2c_add_driver(&amc6821_driver);
}
static void __exit amc6821_exit(void)
{
i2c_del_driver(&amc6821_driver);
}
module_init(amc6821_init);
module_exit(amc6821_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("T. Mertelj <tomaz.mertelj@guest.arnes.si>");
MODULE_DESCRIPTION("Texas Instruments amc6821 hwmon driver");
MODULE_SUPPORTED_DEVICE("amc6821");
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment