mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
722 lines
18 KiB
C
722 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor)
|
|
*
|
|
* Copyright (C) 2008, 2010 Pengutronix
|
|
*
|
|
* TODO: SPI, use power-down mode for suspend?, interrupt handling?
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/err.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/hwmon-sysfs.h>
|
|
#include <linux/slab.h>
|
|
|
|
#define ADT7411_REG_STAT_1 0x00
|
|
#define ADT7411_STAT_1_INT_TEMP_HIGH BIT(0)
|
|
#define ADT7411_STAT_1_INT_TEMP_LOW BIT(1)
|
|
#define ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 BIT(2)
|
|
#define ADT7411_STAT_1_EXT_TEMP_LOW BIT(3)
|
|
#define ADT7411_STAT_1_EXT_TEMP_FAULT BIT(4)
|
|
#define ADT7411_STAT_1_AIN2 BIT(5)
|
|
#define ADT7411_STAT_1_AIN3 BIT(6)
|
|
#define ADT7411_STAT_1_AIN4 BIT(7)
|
|
#define ADT7411_REG_STAT_2 0x01
|
|
#define ADT7411_STAT_2_AIN5 BIT(0)
|
|
#define ADT7411_STAT_2_AIN6 BIT(1)
|
|
#define ADT7411_STAT_2_AIN7 BIT(2)
|
|
#define ADT7411_STAT_2_AIN8 BIT(3)
|
|
#define ADT7411_STAT_2_VDD BIT(4)
|
|
#define ADT7411_REG_INT_TEMP_VDD_LSB 0x03
|
|
#define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04
|
|
#define ADT7411_REG_VDD_MSB 0x06
|
|
#define ADT7411_REG_INT_TEMP_MSB 0x07
|
|
#define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08
|
|
|
|
#define ADT7411_REG_CFG1 0x18
|
|
#define ADT7411_CFG1_START_MONITOR BIT(0)
|
|
#define ADT7411_CFG1_RESERVED_BIT1 BIT(1)
|
|
#define ADT7411_CFG1_EXT_TDM BIT(2)
|
|
#define ADT7411_CFG1_RESERVED_BIT3 BIT(3)
|
|
|
|
#define ADT7411_REG_CFG2 0x19
|
|
#define ADT7411_CFG2_DISABLE_AVG BIT(5)
|
|
|
|
#define ADT7411_REG_CFG3 0x1a
|
|
#define ADT7411_CFG3_ADC_CLK_225 BIT(0)
|
|
#define ADT7411_CFG3_RESERVED_BIT1 BIT(1)
|
|
#define ADT7411_CFG3_RESERVED_BIT2 BIT(2)
|
|
#define ADT7411_CFG3_RESERVED_BIT3 BIT(3)
|
|
#define ADT7411_CFG3_REF_VDD BIT(4)
|
|
|
|
#define ADT7411_REG_VDD_HIGH 0x23
|
|
#define ADT7411_REG_VDD_LOW 0x24
|
|
#define ADT7411_REG_TEMP_HIGH(nr) (0x25 + 2 * (nr))
|
|
#define ADT7411_REG_TEMP_LOW(nr) (0x26 + 2 * (nr))
|
|
#define ADT7411_REG_IN_HIGH(nr) ((nr) > 1 \
|
|
? 0x2b + 2 * ((nr)-2) \
|
|
: 0x27)
|
|
#define ADT7411_REG_IN_LOW(nr) ((nr) > 1 \
|
|
? 0x2c + 2 * ((nr)-2) \
|
|
: 0x28)
|
|
|
|
#define ADT7411_REG_DEVICE_ID 0x4d
|
|
#define ADT7411_REG_MANUFACTURER_ID 0x4e
|
|
|
|
#define ADT7411_DEVICE_ID 0x2
|
|
#define ADT7411_MANUFACTURER_ID 0x41
|
|
|
|
static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END };
|
|
|
|
static const u8 adt7411_in_alarm_reg[] = {
|
|
ADT7411_REG_STAT_2,
|
|
ADT7411_REG_STAT_1,
|
|
ADT7411_REG_STAT_1,
|
|
ADT7411_REG_STAT_1,
|
|
ADT7411_REG_STAT_1,
|
|
ADT7411_REG_STAT_2,
|
|
ADT7411_REG_STAT_2,
|
|
ADT7411_REG_STAT_2,
|
|
ADT7411_REG_STAT_2,
|
|
};
|
|
|
|
static const u8 adt7411_in_alarm_bits[] = {
|
|
ADT7411_STAT_2_VDD,
|
|
ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1,
|
|
ADT7411_STAT_1_AIN2,
|
|
ADT7411_STAT_1_AIN3,
|
|
ADT7411_STAT_1_AIN4,
|
|
ADT7411_STAT_2_AIN5,
|
|
ADT7411_STAT_2_AIN6,
|
|
ADT7411_STAT_2_AIN7,
|
|
ADT7411_STAT_2_AIN8,
|
|
};
|
|
|
|
struct adt7411_data {
|
|
struct mutex device_lock; /* for "atomic" device accesses */
|
|
struct mutex update_lock;
|
|
unsigned long next_update;
|
|
long vref_cached;
|
|
struct i2c_client *client;
|
|
bool use_ext_temp;
|
|
};
|
|
|
|
/*
|
|
* When reading a register containing (up to 4) lsb, all associated
|
|
* msb-registers get locked by the hardware. After _one_ of those msb is read,
|
|
* _all_ are unlocked. In order to use this locking correctly, reading lsb/msb
|
|
* is protected here with a mutex, too.
|
|
*/
|
|
static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg,
|
|
u8 msb_reg, u8 lsb_shift)
|
|
{
|
|
struct adt7411_data *data = i2c_get_clientdata(client);
|
|
int val, tmp;
|
|
|
|
mutex_lock(&data->device_lock);
|
|
|
|
val = i2c_smbus_read_byte_data(client, lsb_reg);
|
|
if (val < 0)
|
|
goto exit_unlock;
|
|
|
|
tmp = (val >> lsb_shift) & 3;
|
|
val = i2c_smbus_read_byte_data(client, msb_reg);
|
|
|
|
if (val >= 0)
|
|
val = (val << 2) | tmp;
|
|
|
|
exit_unlock:
|
|
mutex_unlock(&data->device_lock);
|
|
|
|
return val;
|
|
}
|
|
|
|
static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit,
|
|
bool flag)
|
|
{
|
|
struct adt7411_data *data = i2c_get_clientdata(client);
|
|
int ret, val;
|
|
|
|
mutex_lock(&data->device_lock);
|
|
|
|
ret = i2c_smbus_read_byte_data(client, reg);
|
|
if (ret < 0)
|
|
goto exit_unlock;
|
|
|
|
if (flag)
|
|
val = ret | bit;
|
|
else
|
|
val = ret & ~bit;
|
|
|
|
ret = i2c_smbus_write_byte_data(client, reg, val);
|
|
|
|
exit_unlock:
|
|
mutex_unlock(&data->device_lock);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t adt7411_show_bit(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int ret = i2c_smbus_read_byte_data(client, attr2->index);
|
|
|
|
return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr));
|
|
}
|
|
|
|
static ssize_t adt7411_set_bit(struct device *dev,
|
|
struct device_attribute *attr, const char *buf,
|
|
size_t count)
|
|
{
|
|
struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr);
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int ret;
|
|
unsigned long flag;
|
|
|
|
ret = kstrtoul(buf, 0, &flag);
|
|
if (ret || flag > 1)
|
|
return -EINVAL;
|
|
|
|
ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag);
|
|
|
|
/* force update */
|
|
mutex_lock(&data->update_lock);
|
|
data->next_update = jiffies;
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return ret < 0 ? ret : count;
|
|
}
|
|
|
|
#define ADT7411_BIT_ATTR(__name, __reg, __bit) \
|
|
SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \
|
|
adt7411_set_bit, __bit, __reg)
|
|
|
|
static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG);
|
|
static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225);
|
|
static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD);
|
|
|
|
static struct attribute *adt7411_attrs[] = {
|
|
&sensor_dev_attr_no_average.dev_attr.attr,
|
|
&sensor_dev_attr_fast_sampling.dev_attr.attr,
|
|
&sensor_dev_attr_adc_ref_vdd.dev_attr.attr,
|
|
NULL
|
|
};
|
|
ATTRIBUTE_GROUPS(adt7411);
|
|
|
|
static int adt7411_read_in_alarm(struct device *dev, int channel, long *val)
|
|
{
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int ret;
|
|
|
|
ret = i2c_smbus_read_byte_data(client, adt7411_in_alarm_reg[channel]);
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = !!(ret & adt7411_in_alarm_bits[channel]);
|
|
return 0;
|
|
}
|
|
|
|
static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val)
|
|
{
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int ret;
|
|
|
|
switch (attr) {
|
|
case hwmon_in_input:
|
|
ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
|
|
ADT7411_REG_VDD_MSB, 2);
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = ret * 7000 / 1024;
|
|
return 0;
|
|
case hwmon_in_min:
|
|
ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_LOW);
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = ret * 7000 / 256;
|
|
return 0;
|
|
case hwmon_in_max:
|
|
ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_HIGH);
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = ret * 7000 / 256;
|
|
return 0;
|
|
case hwmon_in_alarm:
|
|
return adt7411_read_in_alarm(dev, 0, val);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int adt7411_update_vref(struct device *dev)
|
|
{
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int val;
|
|
|
|
if (time_after_eq(jiffies, data->next_update)) {
|
|
val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
if (val & ADT7411_CFG3_REF_VDD) {
|
|
val = adt7411_read_in_vdd(dev, hwmon_in_input,
|
|
&data->vref_cached);
|
|
if (val < 0)
|
|
return val;
|
|
} else {
|
|
data->vref_cached = 2250;
|
|
}
|
|
|
|
data->next_update = jiffies + HZ;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel,
|
|
long *val)
|
|
{
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
|
|
int ret;
|
|
int reg, lsb_reg, lsb_shift;
|
|
int nr = channel - 1;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
ret = adt7411_update_vref(dev);
|
|
if (ret < 0)
|
|
goto exit_unlock;
|
|
|
|
switch (attr) {
|
|
case hwmon_in_input:
|
|
lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2);
|
|
lsb_shift = 2 * (nr & 0x03);
|
|
ret = adt7411_read_10_bit(client, lsb_reg,
|
|
ADT7411_REG_EXT_TEMP_AIN1_MSB + nr,
|
|
lsb_shift);
|
|
if (ret < 0)
|
|
goto exit_unlock;
|
|
*val = ret * data->vref_cached / 1024;
|
|
ret = 0;
|
|
break;
|
|
case hwmon_in_min:
|
|
case hwmon_in_max:
|
|
reg = (attr == hwmon_in_min)
|
|
? ADT7411_REG_IN_LOW(channel)
|
|
: ADT7411_REG_IN_HIGH(channel);
|
|
ret = i2c_smbus_read_byte_data(client, reg);
|
|
if (ret < 0)
|
|
goto exit_unlock;
|
|
*val = ret * data->vref_cached / 256;
|
|
ret = 0;
|
|
break;
|
|
case hwmon_in_alarm:
|
|
ret = adt7411_read_in_alarm(dev, channel, val);
|
|
break;
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
exit_unlock:
|
|
mutex_unlock(&data->update_lock);
|
|
return ret;
|
|
}
|
|
|
|
static int adt7411_read_in(struct device *dev, u32 attr, int channel,
|
|
long *val)
|
|
{
|
|
if (channel == 0)
|
|
return adt7411_read_in_vdd(dev, attr, val);
|
|
else
|
|
return adt7411_read_in_chan(dev, attr, channel, val);
|
|
}
|
|
|
|
|
|
static int adt7411_read_temp_alarm(struct device *dev, u32 attr, int channel,
|
|
long *val)
|
|
{
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int ret, bit;
|
|
|
|
ret = i2c_smbus_read_byte_data(client, ADT7411_REG_STAT_1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
switch (attr) {
|
|
case hwmon_temp_min_alarm:
|
|
bit = channel ? ADT7411_STAT_1_EXT_TEMP_LOW
|
|
: ADT7411_STAT_1_INT_TEMP_LOW;
|
|
break;
|
|
case hwmon_temp_max_alarm:
|
|
bit = channel ? ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1
|
|
: ADT7411_STAT_1_INT_TEMP_HIGH;
|
|
break;
|
|
case hwmon_temp_fault:
|
|
bit = ADT7411_STAT_1_EXT_TEMP_FAULT;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
*val = !!(ret & bit);
|
|
return 0;
|
|
}
|
|
|
|
static int adt7411_read_temp(struct device *dev, u32 attr, int channel,
|
|
long *val)
|
|
{
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int ret, reg, regl, regh;
|
|
|
|
switch (attr) {
|
|
case hwmon_temp_input:
|
|
regl = channel ? ADT7411_REG_EXT_TEMP_AIN14_LSB :
|
|
ADT7411_REG_INT_TEMP_VDD_LSB;
|
|
regh = channel ? ADT7411_REG_EXT_TEMP_AIN1_MSB :
|
|
ADT7411_REG_INT_TEMP_MSB;
|
|
ret = adt7411_read_10_bit(client, regl, regh, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */
|
|
*val = ret * 250;
|
|
return 0;
|
|
case hwmon_temp_min:
|
|
case hwmon_temp_max:
|
|
reg = (attr == hwmon_temp_min)
|
|
? ADT7411_REG_TEMP_LOW(channel)
|
|
: ADT7411_REG_TEMP_HIGH(channel);
|
|
ret = i2c_smbus_read_byte_data(client, reg);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = ret & 0x80 ? ret - 0x100 : ret; /* 8 bit signed */
|
|
*val = ret * 1000;
|
|
return 0;
|
|
case hwmon_temp_min_alarm:
|
|
case hwmon_temp_max_alarm:
|
|
case hwmon_temp_fault:
|
|
return adt7411_read_temp_alarm(dev, attr, channel, val);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int adt7411_read(struct device *dev, enum hwmon_sensor_types type,
|
|
u32 attr, int channel, long *val)
|
|
{
|
|
switch (type) {
|
|
case hwmon_in:
|
|
return adt7411_read_in(dev, attr, channel, val);
|
|
case hwmon_temp:
|
|
return adt7411_read_temp(dev, attr, channel, val);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int adt7411_write_in_vdd(struct device *dev, u32 attr, long val)
|
|
{
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int reg;
|
|
|
|
val = clamp_val(val, 0, 255 * 7000 / 256);
|
|
val = DIV_ROUND_CLOSEST(val * 256, 7000);
|
|
|
|
switch (attr) {
|
|
case hwmon_in_min:
|
|
reg = ADT7411_REG_VDD_LOW;
|
|
break;
|
|
case hwmon_in_max:
|
|
reg = ADT7411_REG_VDD_HIGH;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return i2c_smbus_write_byte_data(client, reg, val);
|
|
}
|
|
|
|
static int adt7411_write_in_chan(struct device *dev, u32 attr, int channel,
|
|
long val)
|
|
{
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int ret, reg;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
ret = adt7411_update_vref(dev);
|
|
if (ret < 0)
|
|
goto exit_unlock;
|
|
val = clamp_val(val, 0, 255 * data->vref_cached / 256);
|
|
val = DIV_ROUND_CLOSEST(val * 256, data->vref_cached);
|
|
|
|
switch (attr) {
|
|
case hwmon_in_min:
|
|
reg = ADT7411_REG_IN_LOW(channel);
|
|
break;
|
|
case hwmon_in_max:
|
|
reg = ADT7411_REG_IN_HIGH(channel);
|
|
break;
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
goto exit_unlock;
|
|
}
|
|
|
|
ret = i2c_smbus_write_byte_data(client, reg, val);
|
|
exit_unlock:
|
|
mutex_unlock(&data->update_lock);
|
|
return ret;
|
|
}
|
|
|
|
static int adt7411_write_in(struct device *dev, u32 attr, int channel,
|
|
long val)
|
|
{
|
|
if (channel == 0)
|
|
return adt7411_write_in_vdd(dev, attr, val);
|
|
else
|
|
return adt7411_write_in_chan(dev, attr, channel, val);
|
|
}
|
|
|
|
static int adt7411_write_temp(struct device *dev, u32 attr, int channel,
|
|
long val)
|
|
{
|
|
struct adt7411_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int reg;
|
|
|
|
val = clamp_val(val, -128000, 127000);
|
|
val = DIV_ROUND_CLOSEST(val, 1000);
|
|
|
|
switch (attr) {
|
|
case hwmon_temp_min:
|
|
reg = ADT7411_REG_TEMP_LOW(channel);
|
|
break;
|
|
case hwmon_temp_max:
|
|
reg = ADT7411_REG_TEMP_HIGH(channel);
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return i2c_smbus_write_byte_data(client, reg, val);
|
|
}
|
|
|
|
static int adt7411_write(struct device *dev, enum hwmon_sensor_types type,
|
|
u32 attr, int channel, long val)
|
|
{
|
|
switch (type) {
|
|
case hwmon_in:
|
|
return adt7411_write_in(dev, attr, channel, val);
|
|
case hwmon_temp:
|
|
return adt7411_write_temp(dev, attr, channel, val);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static umode_t adt7411_is_visible(const void *_data,
|
|
enum hwmon_sensor_types type,
|
|
u32 attr, int channel)
|
|
{
|
|
const struct adt7411_data *data = _data;
|
|
bool visible;
|
|
|
|
switch (type) {
|
|
case hwmon_in:
|
|
visible = channel == 0 || channel >= 3 || !data->use_ext_temp;
|
|
switch (attr) {
|
|
case hwmon_in_input:
|
|
case hwmon_in_alarm:
|
|
return visible ? S_IRUGO : 0;
|
|
case hwmon_in_min:
|
|
case hwmon_in_max:
|
|
return visible ? S_IRUGO | S_IWUSR : 0;
|
|
}
|
|
break;
|
|
case hwmon_temp:
|
|
visible = channel == 0 || data->use_ext_temp;
|
|
switch (attr) {
|
|
case hwmon_temp_input:
|
|
case hwmon_temp_min_alarm:
|
|
case hwmon_temp_max_alarm:
|
|
case hwmon_temp_fault:
|
|
return visible ? S_IRUGO : 0;
|
|
case hwmon_temp_min:
|
|
case hwmon_temp_max:
|
|
return visible ? S_IRUGO | S_IWUSR : 0;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int adt7411_detect(struct i2c_client *client,
|
|
struct i2c_board_info *info)
|
|
{
|
|
int val;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID);
|
|
if (val < 0 || val != ADT7411_MANUFACTURER_ID) {
|
|
dev_dbg(&client->dev,
|
|
"Wrong manufacturer ID. Got %d, expected %d\n",
|
|
val, ADT7411_MANUFACTURER_ID);
|
|
return -ENODEV;
|
|
}
|
|
|
|
val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID);
|
|
if (val < 0 || val != ADT7411_DEVICE_ID) {
|
|
dev_dbg(&client->dev,
|
|
"Wrong device ID. Got %d, expected %d\n",
|
|
val, ADT7411_DEVICE_ID);
|
|
return -ENODEV;
|
|
}
|
|
|
|
strlcpy(info->type, "adt7411", I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adt7411_init_device(struct adt7411_data *data)
|
|
{
|
|
int ret;
|
|
u8 val;
|
|
|
|
ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG3);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* We must only write zero to bit 1 and bit 2 and only one to bit 3
|
|
* according to the datasheet.
|
|
*/
|
|
val = ret;
|
|
val &= ~(ADT7411_CFG3_RESERVED_BIT1 | ADT7411_CFG3_RESERVED_BIT2);
|
|
val |= ADT7411_CFG3_RESERVED_BIT3;
|
|
|
|
ret = i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG3, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
data->use_ext_temp = ret & ADT7411_CFG1_EXT_TDM;
|
|
|
|
/*
|
|
* We must only write zero to bit 1 and only one to bit 3 according to
|
|
* the datasheet.
|
|
*/
|
|
val = ret;
|
|
val &= ~ADT7411_CFG1_RESERVED_BIT1;
|
|
val |= ADT7411_CFG1_RESERVED_BIT3;
|
|
|
|
/* enable monitoring */
|
|
val |= ADT7411_CFG1_START_MONITOR;
|
|
|
|
return i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG1, val);
|
|
}
|
|
|
|
static const struct hwmon_channel_info *adt7411_info[] = {
|
|
HWMON_CHANNEL_INFO(in,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM),
|
|
HWMON_CHANNEL_INFO(temp,
|
|
HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM |
|
|
HWMON_T_MAX | HWMON_T_MAX_ALARM,
|
|
HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM |
|
|
HWMON_T_MAX | HWMON_T_MAX_ALARM | HWMON_T_FAULT),
|
|
NULL
|
|
};
|
|
|
|
static const struct hwmon_ops adt7411_hwmon_ops = {
|
|
.is_visible = adt7411_is_visible,
|
|
.read = adt7411_read,
|
|
.write = adt7411_write,
|
|
};
|
|
|
|
static const struct hwmon_chip_info adt7411_chip_info = {
|
|
.ops = &adt7411_hwmon_ops,
|
|
.info = adt7411_info,
|
|
};
|
|
|
|
static int adt7411_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct adt7411_data *data;
|
|
struct device *hwmon_dev;
|
|
int ret;
|
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, data);
|
|
data->client = client;
|
|
mutex_init(&data->device_lock);
|
|
mutex_init(&data->update_lock);
|
|
|
|
ret = adt7411_init_device(data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* force update on first occasion */
|
|
data->next_update = jiffies;
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
|
|
data,
|
|
&adt7411_chip_info,
|
|
adt7411_groups);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static const struct i2c_device_id adt7411_id[] = {
|
|
{ "adt7411", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, adt7411_id);
|
|
|
|
static struct i2c_driver adt7411_driver = {
|
|
.driver = {
|
|
.name = "adt7411",
|
|
},
|
|
.probe = adt7411_probe,
|
|
.id_table = adt7411_id,
|
|
.detect = adt7411_detect,
|
|
.address_list = normal_i2c,
|
|
.class = I2C_CLASS_HWMON,
|
|
};
|
|
|
|
module_i2c_driver(adt7411_driver);
|
|
|
|
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de> and "
|
|
"Wolfram Sang <w.sang@pengutronix.de>");
|
|
MODULE_DESCRIPTION("ADT7411 driver");
|
|
MODULE_LICENSE("GPL v2");
|