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adt7462.c
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adt7462.c
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/*
* A hwmon driver for the Analog Devices ADT7462
* Copyright (C) 2008 IBM
*
* Author: Darrick J. Wong <[email protected]>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.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>
#include <linux/log2.h>
#include <linux/slab.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x58, 0x5C, I2C_CLIENT_END };
/* ADT7462 registers */
#define ADT7462_REG_DEVICE 0x3D
#define ADT7462_REG_VENDOR 0x3E
#define ADT7462_REG_REVISION 0x3F
#define ADT7462_REG_MIN_TEMP_BASE_ADDR 0x44
#define ADT7462_REG_MIN_TEMP_MAX_ADDR 0x47
#define ADT7462_REG_MAX_TEMP_BASE_ADDR 0x48
#define ADT7462_REG_MAX_TEMP_MAX_ADDR 0x4B
#define ADT7462_REG_TEMP_BASE_ADDR 0x88
#define ADT7462_REG_TEMP_MAX_ADDR 0x8F
#define ADT7462_REG_FAN_BASE_ADDR 0x98
#define ADT7462_REG_FAN_MAX_ADDR 0x9F
#define ADT7462_REG_FAN2_BASE_ADDR 0xA2
#define ADT7462_REG_FAN2_MAX_ADDR 0xA9
#define ADT7462_REG_FAN_ENABLE 0x07
#define ADT7462_REG_FAN_MIN_BASE_ADDR 0x78
#define ADT7462_REG_FAN_MIN_MAX_ADDR 0x7F
#define ADT7462_REG_CFG2 0x02
#define ADT7462_FSPD_MASK 0x20
#define ADT7462_REG_PWM_BASE_ADDR 0xAA
#define ADT7462_REG_PWM_MAX_ADDR 0xAD
#define ADT7462_REG_PWM_MIN_BASE_ADDR 0x28
#define ADT7462_REG_PWM_MIN_MAX_ADDR 0x2B
#define ADT7462_REG_PWM_MAX 0x2C
#define ADT7462_REG_PWM_TEMP_MIN_BASE_ADDR 0x5C
#define ADT7462_REG_PWM_TEMP_MIN_MAX_ADDR 0x5F
#define ADT7462_REG_PWM_TEMP_RANGE_BASE_ADDR 0x60
#define ADT7462_REG_PWM_TEMP_RANGE_MAX_ADDR 0x63
#define ADT7462_PWM_HYST_MASK 0x0F
#define ADT7462_PWM_RANGE_MASK 0xF0
#define ADT7462_PWM_RANGE_SHIFT 4
#define ADT7462_REG_PWM_CFG_BASE_ADDR 0x21
#define ADT7462_REG_PWM_CFG_MAX_ADDR 0x24
#define ADT7462_PWM_CHANNEL_MASK 0xE0
#define ADT7462_PWM_CHANNEL_SHIFT 5
#define ADT7462_REG_PIN_CFG_BASE_ADDR 0x10
#define ADT7462_REG_PIN_CFG_MAX_ADDR 0x13
#define ADT7462_PIN7_INPUT 0x01 /* cfg0 */
#define ADT7462_DIODE3_INPUT 0x20
#define ADT7462_DIODE1_INPUT 0x40
#define ADT7462_VID_INPUT 0x80
#define ADT7462_PIN22_INPUT 0x04 /* cfg1 */
#define ADT7462_PIN21_INPUT 0x08
#define ADT7462_PIN19_INPUT 0x10
#define ADT7462_PIN15_INPUT 0x20
#define ADT7462_PIN13_INPUT 0x40
#define ADT7462_PIN8_INPUT 0x80
#define ADT7462_PIN23_MASK 0x03
#define ADT7462_PIN23_SHIFT 0
#define ADT7462_PIN26_MASK 0x0C /* cfg2 */
#define ADT7462_PIN26_SHIFT 2
#define ADT7462_PIN25_MASK 0x30
#define ADT7462_PIN25_SHIFT 4
#define ADT7462_PIN24_MASK 0xC0
#define ADT7462_PIN24_SHIFT 6
#define ADT7462_PIN26_VOLT_INPUT 0x08
#define ADT7462_PIN25_VOLT_INPUT 0x20
#define ADT7462_PIN28_SHIFT 4 /* cfg3 */
#define ADT7462_PIN28_VOLT 0x5
#define ADT7462_REG_ALARM1 0xB8
#define ADT7462_LT_ALARM 0x02
#define ADT7462_R1T_ALARM 0x04
#define ADT7462_R2T_ALARM 0x08
#define ADT7462_R3T_ALARM 0x10
#define ADT7462_REG_ALARM2 0xBB
#define ADT7462_V0_ALARM 0x01
#define ADT7462_V1_ALARM 0x02
#define ADT7462_V2_ALARM 0x04
#define ADT7462_V3_ALARM 0x08
#define ADT7462_V4_ALARM 0x10
#define ADT7462_V5_ALARM 0x20
#define ADT7462_V6_ALARM 0x40
#define ADT7462_V7_ALARM 0x80
#define ADT7462_REG_ALARM3 0xBC
#define ADT7462_V8_ALARM 0x08
#define ADT7462_V9_ALARM 0x10
#define ADT7462_V10_ALARM 0x20
#define ADT7462_V11_ALARM 0x40
#define ADT7462_V12_ALARM 0x80
#define ADT7462_REG_ALARM4 0xBD
#define ADT7462_F0_ALARM 0x01
#define ADT7462_F1_ALARM 0x02
#define ADT7462_F2_ALARM 0x04
#define ADT7462_F3_ALARM 0x08
#define ADT7462_F4_ALARM 0x10
#define ADT7462_F5_ALARM 0x20
#define ADT7462_F6_ALARM 0x40
#define ADT7462_F7_ALARM 0x80
#define ADT7462_ALARM1 0x0000
#define ADT7462_ALARM2 0x0100
#define ADT7462_ALARM3 0x0200
#define ADT7462_ALARM4 0x0300
#define ADT7462_ALARM_REG_SHIFT 8
#define ADT7462_ALARM_FLAG_MASK 0x0F
#define ADT7462_TEMP_COUNT 4
#define ADT7462_TEMP_REG(x) (ADT7462_REG_TEMP_BASE_ADDR + ((x) * 2))
#define ADT7462_TEMP_MIN_REG(x) (ADT7462_REG_MIN_TEMP_BASE_ADDR + (x))
#define ADT7462_TEMP_MAX_REG(x) (ADT7462_REG_MAX_TEMP_BASE_ADDR + (x))
#define TEMP_FRAC_OFFSET 6
#define ADT7462_FAN_COUNT 8
#define ADT7462_REG_FAN_MIN(x) (ADT7462_REG_FAN_MIN_BASE_ADDR + (x))
#define ADT7462_PWM_COUNT 4
#define ADT7462_REG_PWM(x) (ADT7462_REG_PWM_BASE_ADDR + (x))
#define ADT7462_REG_PWM_MIN(x) (ADT7462_REG_PWM_MIN_BASE_ADDR + (x))
#define ADT7462_REG_PWM_TMIN(x) \
(ADT7462_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
#define ADT7462_REG_PWM_TRANGE(x) \
(ADT7462_REG_PWM_TEMP_RANGE_BASE_ADDR + (x))
#define ADT7462_PIN_CFG_REG_COUNT 4
#define ADT7462_REG_PIN_CFG(x) (ADT7462_REG_PIN_CFG_BASE_ADDR + (x))
#define ADT7462_REG_PWM_CFG(x) (ADT7462_REG_PWM_CFG_BASE_ADDR + (x))
#define ADT7462_ALARM_REG_COUNT 4
/*
* The chip can measure 13 different voltage sources:
*
* 1. +12V1 (pin 7)
* 2. Vccp1/+2.5V/+1.8V/+1.5V (pin 23)
* 3. +12V3 (pin 22)
* 4. +5V (pin 21)
* 5. +1.25V/+0.9V (pin 19)
* 6. +2.5V/+1.8V (pin 15)
* 7. +3.3v (pin 13)
* 8. +12V2 (pin 8)
* 9. Vbatt/FSB_Vtt (pin 26)
* A. +3.3V/+1.2V1 (pin 25)
* B. Vccp2/+2.5V/+1.8V/+1.5V (pin 24)
* C. +1.5V ICH (only if BOTH pin 28/29 are set to +1.5V)
* D. +1.5V 3GPIO (only if BOTH pin 28/29 are set to +1.5V)
*
* Each of these 13 has a factor to convert raw to voltage. Even better,
* the pins can be connected to other sensors (tach/gpio/hot/etc), which
* makes the bookkeeping tricky.
*
* Some, but not all, of these voltages have low/high limits.
*/
#define ADT7462_VOLT_COUNT 13
#define ADT7462_VENDOR 0x41
#define ADT7462_DEVICE 0x62
/* datasheet only mentions a revision 4 */
#define ADT7462_REVISION 0x04
/* How often do we reread sensors values? (In jiffies) */
#define SENSOR_REFRESH_INTERVAL (2 * HZ)
/* How often do we reread sensor limit values? (In jiffies) */
#define LIMIT_REFRESH_INTERVAL (60 * HZ)
/* datasheet says to divide this number by the fan reading to get fan rpm */
#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
#define FAN_PERIOD_INVALID 65535
#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
#define MASK_AND_SHIFT(value, prefix) \
(((value) & prefix##_MASK) >> prefix##_SHIFT)
struct adt7462_data {
struct device *hwmon_dev;
struct attribute_group attrs;
struct mutex lock;
char sensors_valid;
char limits_valid;
unsigned long sensors_last_updated; /* In jiffies */
unsigned long limits_last_updated; /* In jiffies */
u8 temp[ADT7462_TEMP_COUNT];
/* bits 6-7 are quarter pieces of temp */
u8 temp_frac[ADT7462_TEMP_COUNT];
u8 temp_min[ADT7462_TEMP_COUNT];
u8 temp_max[ADT7462_TEMP_COUNT];
u16 fan[ADT7462_FAN_COUNT];
u8 fan_enabled;
u8 fan_min[ADT7462_FAN_COUNT];
u8 cfg2;
u8 pwm[ADT7462_PWM_COUNT];
u8 pin_cfg[ADT7462_PIN_CFG_REG_COUNT];
u8 voltages[ADT7462_VOLT_COUNT];
u8 volt_max[ADT7462_VOLT_COUNT];
u8 volt_min[ADT7462_VOLT_COUNT];
u8 pwm_min[ADT7462_PWM_COUNT];
u8 pwm_tmin[ADT7462_PWM_COUNT];
u8 pwm_trange[ADT7462_PWM_COUNT];
u8 pwm_max; /* only one per chip */
u8 pwm_cfg[ADT7462_PWM_COUNT];
u8 alarms[ADT7462_ALARM_REG_COUNT];
};
static int adt7462_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int adt7462_detect(struct i2c_client *client,
struct i2c_board_info *info);
static int adt7462_remove(struct i2c_client *client);
static const struct i2c_device_id adt7462_id[] = {
{ "adt7462", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adt7462_id);
static struct i2c_driver adt7462_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "adt7462",
},
.probe = adt7462_probe,
.remove = adt7462_remove,
.id_table = adt7462_id,
.detect = adt7462_detect,
.address_list = normal_i2c,
};
/*
* 16-bit registers on the ADT7462 are low-byte first. The data sheet says
* that the low byte must be read before the high byte.
*/
static inline int adt7462_read_word_data(struct i2c_client *client, u8 reg)
{
u16 foo;
foo = i2c_smbus_read_byte_data(client, reg);
foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
return foo;
}
/* For some reason these registers are not contiguous. */
static int ADT7462_REG_FAN(int fan)
{
if (fan < 4)
return ADT7462_REG_FAN_BASE_ADDR + (2 * fan);
return ADT7462_REG_FAN2_BASE_ADDR + (2 * (fan - 4));
}
/* Voltage registers are scattered everywhere */
static int ADT7462_REG_VOLT_MAX(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
return 0x7C;
break;
case 1:
return 0x69;
case 2:
if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
return 0x7F;
break;
case 3:
if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
return 0x7E;
break;
case 4:
if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT))
return 0x4B;
break;
case 5:
if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT))
return 0x49;
break;
case 6:
if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
return 0x68;
break;
case 7:
if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
return 0x7D;
break;
case 8:
if (!(data->pin_cfg[2] & ADT7462_PIN26_VOLT_INPUT))
return 0x6C;
break;
case 9:
if (!(data->pin_cfg[2] & ADT7462_PIN25_VOLT_INPUT))
return 0x6B;
break;
case 10:
return 0x6A;
case 11:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x50;
break;
case 12:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x4C;
break;
}
return -ENODEV;
}
static int ADT7462_REG_VOLT_MIN(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
return 0x6D;
break;
case 1:
return 0x72;
case 2:
if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
return 0x6F;
break;
case 3:
if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
return 0x71;
break;
case 4:
if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT))
return 0x47;
break;
case 5:
if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT))
return 0x45;
break;
case 6:
if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
return 0x70;
break;
case 7:
if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
return 0x6E;
break;
case 8:
if (!(data->pin_cfg[2] & ADT7462_PIN26_VOLT_INPUT))
return 0x75;
break;
case 9:
if (!(data->pin_cfg[2] & ADT7462_PIN25_VOLT_INPUT))
return 0x74;
break;
case 10:
return 0x73;
case 11:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x76;
break;
case 12:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x77;
break;
}
return -ENODEV;
}
static int ADT7462_REG_VOLT(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
return 0xA3;
break;
case 1:
return 0x90;
case 2:
if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
return 0xA9;
break;
case 3:
if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
return 0xA7;
break;
case 4:
if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT))
return 0x8F;
break;
case 5:
if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT))
return 0x8B;
break;
case 6:
if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
return 0x96;
break;
case 7:
if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
return 0xA5;
break;
case 8:
if (!(data->pin_cfg[2] & ADT7462_PIN26_VOLT_INPUT))
return 0x93;
break;
case 9:
if (!(data->pin_cfg[2] & ADT7462_PIN25_VOLT_INPUT))
return 0x92;
break;
case 10:
return 0x91;
case 11:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x94;
break;
case 12:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 0x95;
break;
}
return -ENODEV;
}
/* Provide labels for sysfs */
static const char *voltage_label(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
return "+12V1";
break;
case 1:
switch (MASK_AND_SHIFT(data->pin_cfg[1], ADT7462_PIN23)) {
case 0:
return "Vccp1";
case 1:
return "+2.5V";
case 2:
return "+1.8V";
case 3:
return "+1.5V";
}
case 2:
if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
return "+12V3";
break;
case 3:
if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
return "+5V";
break;
case 4:
if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT)) {
if (data->pin_cfg[1] & ADT7462_PIN19_INPUT)
return "+0.9V";
return "+1.25V";
}
break;
case 5:
if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT)) {
if (data->pin_cfg[1] & ADT7462_PIN19_INPUT)
return "+1.8V";
return "+2.5V";
}
break;
case 6:
if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
return "+3.3V";
break;
case 7:
if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
return "+12V2";
break;
case 8:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN26)) {
case 0:
return "Vbatt";
case 1:
return "FSB_Vtt";
}
break;
case 9:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN25)) {
case 0:
return "+3.3V";
case 1:
return "+1.2V1";
}
break;
case 10:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN24)) {
case 0:
return "Vccp2";
case 1:
return "+2.5V";
case 2:
return "+1.8V";
case 3:
return "+1.5";
}
case 11:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return "+1.5V ICH";
break;
case 12:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return "+1.5V 3GPIO";
break;
}
return "N/A";
}
/* Multipliers are actually in uV, not mV. */
static int voltage_multiplier(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
return 62500;
break;
case 1:
switch (MASK_AND_SHIFT(data->pin_cfg[1], ADT7462_PIN23)) {
case 0:
if (data->pin_cfg[0] & ADT7462_VID_INPUT)
return 12500;
return 6250;
case 1:
return 13000;
case 2:
return 9400;
case 3:
return 7800;
}
case 2:
if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
return 62500;
break;
case 3:
if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
return 26000;
break;
case 4:
if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT)) {
if (data->pin_cfg[1] & ADT7462_PIN19_INPUT)
return 4690;
return 6500;
}
break;
case 5:
if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT)) {
if (data->pin_cfg[1] & ADT7462_PIN15_INPUT)
return 9400;
return 13000;
}
break;
case 6:
if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
return 17200;
break;
case 7:
if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
return 62500;
break;
case 8:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN26)) {
case 0:
return 15600;
case 1:
return 6250;
}
break;
case 9:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN25)) {
case 0:
return 17200;
case 1:
return 6250;
}
break;
case 10:
switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN24)) {
case 0:
return 6250;
case 1:
return 13000;
case 2:
return 9400;
case 3:
return 7800;
}
case 11:
case 12:
if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
ADT7462_PIN28_VOLT &&
!(data->pin_cfg[0] & ADT7462_VID_INPUT))
return 7800;
}
return 0;
}
static int temp_enabled(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
case 2:
return 1;
case 1:
if (data->pin_cfg[0] & ADT7462_DIODE1_INPUT)
return 1;
break;
case 3:
if (data->pin_cfg[0] & ADT7462_DIODE3_INPUT)
return 1;
break;
}
return 0;
}
static const char *temp_label(struct adt7462_data *data, int which)
{
switch (which) {
case 0:
return "local";
case 1:
if (data->pin_cfg[0] & ADT7462_DIODE1_INPUT)
return "remote1";
break;
case 2:
return "remote2";
case 3:
if (data->pin_cfg[0] & ADT7462_DIODE3_INPUT)
return "remote3";
break;
}
return "N/A";
}
/* Map Trange register values to mC */
#define NUM_TRANGE_VALUES 16
static const int trange_values[NUM_TRANGE_VALUES] = {
2000,
2500,
3300,
4000,
5000,
6700,
8000,
10000,
13300,
16000,
20000,
26700,
32000,
40000,
53300,
80000
};
static int find_trange_value(int trange)
{
int i;
for (i = 0; i < NUM_TRANGE_VALUES; i++)
if (trange_values[i] == trange)
return i;
return -ENODEV;
}
static struct adt7462_data *adt7462_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct adt7462_data *data = i2c_get_clientdata(client);
unsigned long local_jiffies = jiffies;
int i;
mutex_lock(&data->lock);
if (time_before(local_jiffies, data->sensors_last_updated +
SENSOR_REFRESH_INTERVAL)
&& data->sensors_valid)
goto no_sensor_update;
for (i = 0; i < ADT7462_TEMP_COUNT; i++) {
/*
* Reading the fractional register locks the integral
* register until both have been read.
*/
data->temp_frac[i] = i2c_smbus_read_byte_data(client,
ADT7462_TEMP_REG(i));
data->temp[i] = i2c_smbus_read_byte_data(client,
ADT7462_TEMP_REG(i) + 1);
}
for (i = 0; i < ADT7462_FAN_COUNT; i++)
data->fan[i] = adt7462_read_word_data(client,
ADT7462_REG_FAN(i));
data->fan_enabled = i2c_smbus_read_byte_data(client,
ADT7462_REG_FAN_ENABLE);
for (i = 0; i < ADT7462_PWM_COUNT; i++)
data->pwm[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PWM(i));
for (i = 0; i < ADT7462_PIN_CFG_REG_COUNT; i++)
data->pin_cfg[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PIN_CFG(i));
for (i = 0; i < ADT7462_VOLT_COUNT; i++) {
int reg = ADT7462_REG_VOLT(data, i);
if (!reg)
data->voltages[i] = 0;
else
data->voltages[i] = i2c_smbus_read_byte_data(client,
reg);
}
data->alarms[0] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM1);
data->alarms[1] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM2);
data->alarms[2] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM3);
data->alarms[3] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM4);
data->sensors_last_updated = local_jiffies;
data->sensors_valid = 1;
no_sensor_update:
if (time_before(local_jiffies, data->limits_last_updated +
LIMIT_REFRESH_INTERVAL)
&& data->limits_valid)
goto out;
for (i = 0; i < ADT7462_TEMP_COUNT; i++) {
data->temp_min[i] = i2c_smbus_read_byte_data(client,
ADT7462_TEMP_MIN_REG(i));
data->temp_max[i] = i2c_smbus_read_byte_data(client,
ADT7462_TEMP_MAX_REG(i));
}
for (i = 0; i < ADT7462_FAN_COUNT; i++)
data->fan_min[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_FAN_MIN(i));
for (i = 0; i < ADT7462_VOLT_COUNT; i++) {
int reg = ADT7462_REG_VOLT_MAX(data, i);
data->volt_max[i] =
(reg ? i2c_smbus_read_byte_data(client, reg) : 0);
reg = ADT7462_REG_VOLT_MIN(data, i);
data->volt_min[i] =
(reg ? i2c_smbus_read_byte_data(client, reg) : 0);
}
for (i = 0; i < ADT7462_PWM_COUNT; i++) {
data->pwm_min[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PWM_MIN(i));
data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PWM_TMIN(i));
data->pwm_trange[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PWM_TRANGE(i));
data->pwm_cfg[i] = i2c_smbus_read_byte_data(client,
ADT7462_REG_PWM_CFG(i));
}
data->pwm_max = i2c_smbus_read_byte_data(client, ADT7462_REG_PWM_MAX);
data->cfg2 = i2c_smbus_read_byte_data(client, ADT7462_REG_CFG2);
data->limits_last_updated = local_jiffies;
data->limits_valid = 1;
out:
mutex_unlock(&data->lock);
return data;
}
static ssize_t show_temp_min(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
if (!temp_enabled(data, attr->index))
return sprintf(buf, "0\n");
return sprintf(buf, "%d\n", 1000 * (data->temp_min[attr->index] - 64));
}
static ssize_t set_temp_min(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7462_data *data = i2c_get_clientdata(client);
long temp;
if (kstrtol(buf, 10, &temp) || !temp_enabled(data, attr->index))
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000) + 64;
temp = SENSORS_LIMIT(temp, 0, 255);
mutex_lock(&data->lock);
data->temp_min[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7462_TEMP_MIN_REG(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_temp_max(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
if (!temp_enabled(data, attr->index))
return sprintf(buf, "0\n");
return sprintf(buf, "%d\n", 1000 * (data->temp_max[attr->index] - 64));
}
static ssize_t set_temp_max(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7462_data *data = i2c_get_clientdata(client);
long temp;
if (kstrtol(buf, 10, &temp) || !temp_enabled(data, attr->index))
return -EINVAL;
temp = DIV_ROUND_CLOSEST(temp, 1000) + 64;
temp = SENSORS_LIMIT(temp, 0, 255);
mutex_lock(&data->lock);
data->temp_max[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7462_TEMP_MAX_REG(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
u8 frac = data->temp_frac[attr->index] >> TEMP_FRAC_OFFSET;
if (!temp_enabled(data, attr->index))
return sprintf(buf, "0\n");
return sprintf(buf, "%d\n", 1000 * (data->temp[attr->index] - 64) +
250 * frac);
}
static ssize_t show_temp_label(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
return sprintf(buf, "%s\n", temp_label(data, attr->index));
}
static ssize_t show_volt_max(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
int x = voltage_multiplier(data, attr->index);
x *= data->volt_max[attr->index];
x /= 1000; /* convert from uV to mV */
return sprintf(buf, "%d\n", x);
}
static ssize_t set_volt_max(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7462_data *data = i2c_get_clientdata(client);
int x = voltage_multiplier(data, attr->index);
long temp;
if (kstrtol(buf, 10, &temp) || !x)
return -EINVAL;
temp *= 1000; /* convert mV to uV */
temp = DIV_ROUND_CLOSEST(temp, x);
temp = SENSORS_LIMIT(temp, 0, 255);
mutex_lock(&data->lock);
data->volt_max[attr->index] = temp;
i2c_smbus_write_byte_data(client,
ADT7462_REG_VOLT_MAX(data, attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_volt_min(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7462_data *data = adt7462_update_device(dev);
int x = voltage_multiplier(data, attr->index);
x *= data->volt_min[attr->index];
x /= 1000; /* convert from uV to mV */
return sprintf(buf, "%d\n", x);
}
static ssize_t set_volt_min(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7462_data *data = i2c_get_clientdata(client);
int x = voltage_multiplier(data, attr->index);
long temp;
if (kstrtol(buf, 10, &temp) || !x)
return -EINVAL;
temp *= 1000; /* convert mV to uV */
temp = DIV_ROUND_CLOSEST(temp, x);
temp = SENSORS_LIMIT(temp, 0, 255);
mutex_lock(&data->lock);
data->volt_min[attr->index] = temp;
i2c_smbus_write_byte_data(client,
ADT7462_REG_VOLT_MIN(data, attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_voltage(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);