mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-29 23:53:32 +00:00
Code Issues Releases Wiki Activity
linux-stable/drivers/hwmon/ftsteutates.c
Stephen Kitt 6748703856 hwmon: use simple i2c probe function 
Many hwmon drivers don't use the id information provided by the old
i2c probe function, and the remainder can easily be adapted to the new
form ("probe_new") by calling i2c_match_id explicitly.

This avoids scanning the identifier tables during probes.

Drivers which didn't use the id are converted as-is; drivers which did
are modified as follows:

* if the information in i2c_client is sufficient, that's used instead
  (client->name);
* anything else is handled by calling i2c_match_id() with the same
  level of error-handling (if any) as before.

A few drivers aren't included in this patch because they have a
different set of maintainers. They will be covered by other patches.

Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200813160222.1503401-1-steve@sk2.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2020-09-23 09:42:39 -07:00

832 lines
24 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Support for the FTS Systemmonitoring Chip "Teutates"
*
* Copyright (C) 2016 Fujitsu Technology Solutions GmbH,
* Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>
*/
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/uaccess.h>
#include <linux/watchdog.h>
#define FTS_DEVICE_ID_REG 0x0000
#define FTS_DEVICE_REVISION_REG 0x0001
#define FTS_DEVICE_STATUS_REG 0x0004
#define FTS_SATELLITE_STATUS_REG 0x0005
#define FTS_EVENT_STATUS_REG 0x0006
#define FTS_GLOBAL_CONTROL_REG 0x0007
#define FTS_DEVICE_DETECT_REG_1 0x0C
#define FTS_DEVICE_DETECT_REG_2 0x0D
#define FTS_DEVICE_DETECT_REG_3 0x0E
#define FTS_SENSOR_EVENT_REG 0x0010
#define FTS_FAN_EVENT_REG 0x0014
#define FTS_FAN_PRESENT_REG 0x0015
#define FTS_POWER_ON_TIME_COUNTER_A 0x007A
#define FTS_POWER_ON_TIME_COUNTER_B 0x007B
#define FTS_POWER_ON_TIME_COUNTER_C 0x007C
#define FTS_PAGE_SELECT_REG 0x007F
#define FTS_WATCHDOG_TIME_PRESET 0x000B
#define FTS_WATCHDOG_CONTROL 0x5081
#define FTS_NO_FAN_SENSORS 0x08
#define FTS_NO_TEMP_SENSORS 0x10
#define FTS_NO_VOLT_SENSORS 0x04
static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
static const struct i2c_device_id fts_id[] = {
{ "ftsteutates", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, fts_id);
enum WATCHDOG_RESOLUTION {
seconds = 1,
minutes = 60
};
struct fts_data {
struct i2c_client *client;
/* update sensor data lock */
struct mutex update_lock;
/* read/write register lock */
struct mutex access_lock;
unsigned long last_updated; /* in jiffies */
struct watchdog_device wdd;
enum WATCHDOG_RESOLUTION resolution;
bool valid; /* false until following fields are valid */
u8 volt[FTS_NO_VOLT_SENSORS];
u8 temp_input[FTS_NO_TEMP_SENSORS];
u8 temp_alarm;
u8 fan_present;
u8 fan_input[FTS_NO_FAN_SENSORS]; /* in rps */
u8 fan_source[FTS_NO_FAN_SENSORS];
u8 fan_alarm;
};
#define FTS_REG_FAN_INPUT(idx) ((idx) + 0x20)
#define FTS_REG_FAN_SOURCE(idx) ((idx) + 0x30)
#define FTS_REG_FAN_CONTROL(idx) (((idx) << 16) + 0x4881)
#define FTS_REG_TEMP_INPUT(idx) ((idx) + 0x40)
#define FTS_REG_TEMP_CONTROL(idx) (((idx) << 16) + 0x0681)
#define FTS_REG_VOLT(idx) ((idx) + 0x18)
/*****************************************************************************/
/* I2C Helper functions */
/*****************************************************************************/
static int fts_read_byte(struct i2c_client *client, unsigned short reg)
{
int ret;
unsigned char page = reg >> 8;
struct fts_data *data = dev_get_drvdata(&client->dev);
mutex_lock(&data->access_lock);
dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
if (ret < 0)
goto error;
reg &= 0xFF;
ret = i2c_smbus_read_byte_data(client, reg);
dev_dbg(&client->dev, "read - reg: 0x%.02x: val: 0x%.02x\n", reg, ret);
error:
mutex_unlock(&data->access_lock);
return ret;
}
static int fts_write_byte(struct i2c_client *client, unsigned short reg,
unsigned char value)
{
int ret;
unsigned char page = reg >> 8;
struct fts_data *data = dev_get_drvdata(&client->dev);
mutex_lock(&data->access_lock);
dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
if (ret < 0)
goto error;
reg &= 0xFF;
dev_dbg(&client->dev,
"write - reg: 0x%.02x: val: 0x%.02x\n", reg, value);
ret = i2c_smbus_write_byte_data(client, reg, value);
error:
mutex_unlock(&data->access_lock);
return ret;
}
/*****************************************************************************/
/* Data Updater Helper function */
/*****************************************************************************/
static int fts_update_device(struct fts_data *data)
{
int i;
int err = 0;
mutex_lock(&data->update_lock);
if (!time_after(jiffies, data->last_updated + 2 * HZ) && data->valid)
goto exit;
err = fts_read_byte(data->client, FTS_DEVICE_STATUS_REG);
if (err < 0)
goto exit;
data->valid = !!(err & 0x02); /* Data not ready yet */
if (unlikely(!data->valid)) {
err = -EAGAIN;
goto exit;
}
err = fts_read_byte(data->client, FTS_FAN_PRESENT_REG);
if (err < 0)
goto exit;
data->fan_present = err;
err = fts_read_byte(data->client, FTS_FAN_EVENT_REG);
if (err < 0)
goto exit;
data->fan_alarm = err;
for (i = 0; i < FTS_NO_FAN_SENSORS; i++) {
if (data->fan_present & BIT(i)) {
err = fts_read_byte(data->client, FTS_REG_FAN_INPUT(i));
if (err < 0)
goto exit;
data->fan_input[i] = err;
err = fts_read_byte(data->client,
FTS_REG_FAN_SOURCE(i));
if (err < 0)
goto exit;
data->fan_source[i] = err;
} else {
data->fan_input[i] = 0;
data->fan_source[i] = 0;
}
}
err = fts_read_byte(data->client, FTS_SENSOR_EVENT_REG);
if (err < 0)
goto exit;
data->temp_alarm = err;
for (i = 0; i < FTS_NO_TEMP_SENSORS; i++) {
err = fts_read_byte(data->client, FTS_REG_TEMP_INPUT(i));
if (err < 0)
goto exit;
data->temp_input[i] = err;
}
for (i = 0; i < FTS_NO_VOLT_SENSORS; i++) {
err = fts_read_byte(data->client, FTS_REG_VOLT(i));
if (err < 0)
goto exit;
data->volt[i] = err;
}
data->last_updated = jiffies;
err = 0;
exit:
mutex_unlock(&data->update_lock);
return err;
}
/*****************************************************************************/
/* Watchdog functions */
/*****************************************************************************/
static int fts_wd_set_resolution(struct fts_data *data,
enum WATCHDOG_RESOLUTION resolution)
{
int ret;
if (data->resolution == resolution)
return 0;
ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
if (ret < 0)
return ret;
if ((resolution == seconds && ret & BIT(1)) ||
(resolution == minutes && (ret & BIT(1)) == 0)) {
data->resolution = resolution;
return 0;
}
if (resolution == seconds)
ret |= BIT(1);
else
ret &= ~BIT(1);
ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, ret);
if (ret < 0)
return ret;
data->resolution = resolution;
return ret;
}
static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout)
{
struct fts_data *data;
enum WATCHDOG_RESOLUTION resolution = seconds;
int ret;
data = watchdog_get_drvdata(wdd);
/* switch watchdog resolution to minutes if timeout does not fit
* into a byte
*/
if (timeout > 0xFF) {
timeout = DIV_ROUND_UP(timeout, 60) * 60;
resolution = minutes;
}
ret = fts_wd_set_resolution(data, resolution);
if (ret < 0)
return ret;
wdd->timeout = timeout;
return 0;
}
static int fts_wd_start(struct watchdog_device *wdd)
{
struct fts_data *data = watchdog_get_drvdata(wdd);
return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET,
wdd->timeout / (u8)data->resolution);
}
static int fts_wd_stop(struct watchdog_device *wdd)
{
struct fts_data *data;
data = watchdog_get_drvdata(wdd);
return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, 0);
}
static const struct watchdog_info fts_wd_info = {
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
.identity = "FTS Teutates Hardware Watchdog",
};
static const struct watchdog_ops fts_wd_ops = {
.owner = THIS_MODULE,
.start = fts_wd_start,
.stop = fts_wd_stop,
.set_timeout = fts_wd_set_timeout,
};
static int fts_watchdog_init(struct fts_data *data)
{
int timeout, ret;
watchdog_set_drvdata(&data->wdd, data);
timeout = fts_read_byte(data->client, FTS_WATCHDOG_TIME_PRESET);
if (timeout < 0)
return timeout;
/* watchdog not running, set timeout to a default of 60 sec. */
if (timeout == 0) {
ret = fts_wd_set_resolution(data, seconds);
if (ret < 0)
return ret;
data->wdd.timeout = 60;
} else {
ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
if (ret < 0)
return ret;
data->resolution = ret & BIT(1) ? seconds : minutes;
data->wdd.timeout = timeout * (u8)data->resolution;
set_bit(WDOG_HW_RUNNING, &data->wdd.status);
}
/* Register our watchdog part */
data->wdd.info = &fts_wd_info;
data->wdd.ops = &fts_wd_ops;
data->wdd.parent = &data->client->dev;
data->wdd.min_timeout = 1;
/* max timeout 255 minutes. */
data->wdd.max_hw_heartbeat_ms = 0xFF * 60 * MSEC_PER_SEC;
return watchdog_register_device(&data->wdd);
}
/*****************************************************************************/
/* SysFS handler functions */
/*****************************************************************************/
static ssize_t in_value_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%u\n", data->volt[index]);
}
static ssize_t temp_value_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%u\n", data->temp_input[index]);
}
static ssize_t temp_fault_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
/* 00h Temperature = Sensor Error */
return sprintf(buf, "%d\n", data->temp_input[index] == 0);
}
static ssize_t temp_alarm_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%u\n", !!(data->temp_alarm & BIT(index)));
}
static ssize_t
temp_alarm_store(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
long ret;
ret = fts_update_device(data);
if (ret < 0)
return ret;
if (kstrtoul(buf, 10, &ret) || ret != 0)
return -EINVAL;
mutex_lock(&data->update_lock);
ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(index));
if (ret < 0)
goto error;
ret = fts_write_byte(data->client, FTS_REG_TEMP_CONTROL(index),
ret | 0x1);
if (ret < 0)
goto error;
data->valid = false;
ret = count;
error:
mutex_unlock(&data->update_lock);
return ret;
}
static ssize_t fan_value_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%u\n", data->fan_input[index]);
}
static ssize_t fan_source_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%u\n", data->fan_source[index]);
}
static ssize_t fan_alarm_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
int err;
err = fts_update_device(data);
if (err < 0)
return err;
return sprintf(buf, "%d\n", !!(data->fan_alarm & BIT(index)));
}
static ssize_t
fan_alarm_store(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct fts_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(devattr)->index;
long ret;
ret = fts_update_device(data);
if (ret < 0)
return ret;
if (kstrtoul(buf, 10, &ret) || ret != 0)
return -EINVAL;
mutex_lock(&data->update_lock);
ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(index));
if (ret < 0)
goto error;
ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(index),
ret | 0x1);
if (ret < 0)
goto error;
data->valid = false;
ret = count;
error:
mutex_unlock(&data->update_lock);
return ret;
}
/*****************************************************************************/
/* SysFS structs */
/*****************************************************************************/
/* Temprature sensors */
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_value, 0);
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_value, 1);
static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_value, 2);
static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_value, 3);
static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_value, 4);
static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_value, 5);
static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_value, 6);
static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_value, 7);
static SENSOR_DEVICE_ATTR_RO(temp9_input, temp_value, 8);
static SENSOR_DEVICE_ATTR_RO(temp10_input, temp_value, 9);
static SENSOR_DEVICE_ATTR_RO(temp11_input, temp_value, 10);
static SENSOR_DEVICE_ATTR_RO(temp12_input, temp_value, 11);
static SENSOR_DEVICE_ATTR_RO(temp13_input, temp_value, 12);
static SENSOR_DEVICE_ATTR_RO(temp14_input, temp_value, 13);
static SENSOR_DEVICE_ATTR_RO(temp15_input, temp_value, 14);
static SENSOR_DEVICE_ATTR_RO(temp16_input, temp_value, 15);
static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
static SENSOR_DEVICE_ATTR_RO(temp7_fault, temp_fault, 6);
static SENSOR_DEVICE_ATTR_RO(temp8_fault, temp_fault, 7);
static SENSOR_DEVICE_ATTR_RO(temp9_fault, temp_fault, 8);
static SENSOR_DEVICE_ATTR_RO(temp10_fault, temp_fault, 9);
static SENSOR_DEVICE_ATTR_RO(temp11_fault, temp_fault, 10);
static SENSOR_DEVICE_ATTR_RO(temp12_fault, temp_fault, 11);
static SENSOR_DEVICE_ATTR_RO(temp13_fault, temp_fault, 12);
static SENSOR_DEVICE_ATTR_RO(temp14_fault, temp_fault, 13);
static SENSOR_DEVICE_ATTR_RO(temp15_fault, temp_fault, 14);
static SENSOR_DEVICE_ATTR_RO(temp16_fault, temp_fault, 15);
static SENSOR_DEVICE_ATTR_RW(temp1_alarm, temp_alarm, 0);
static SENSOR_DEVICE_ATTR_RW(temp2_alarm, temp_alarm, 1);
static SENSOR_DEVICE_ATTR_RW(temp3_alarm, temp_alarm, 2);
static SENSOR_DEVICE_ATTR_RW(temp4_alarm, temp_alarm, 3);
static SENSOR_DEVICE_ATTR_RW(temp5_alarm, temp_alarm, 4);
static SENSOR_DEVICE_ATTR_RW(temp6_alarm, temp_alarm, 5);
static SENSOR_DEVICE_ATTR_RW(temp7_alarm, temp_alarm, 6);
static SENSOR_DEVICE_ATTR_RW(temp8_alarm, temp_alarm, 7);
static SENSOR_DEVICE_ATTR_RW(temp9_alarm, temp_alarm, 8);
static SENSOR_DEVICE_ATTR_RW(temp10_alarm, temp_alarm, 9);
static SENSOR_DEVICE_ATTR_RW(temp11_alarm, temp_alarm, 10);
static SENSOR_DEVICE_ATTR_RW(temp12_alarm, temp_alarm, 11);
static SENSOR_DEVICE_ATTR_RW(temp13_alarm, temp_alarm, 12);
static SENSOR_DEVICE_ATTR_RW(temp14_alarm, temp_alarm, 13);
static SENSOR_DEVICE_ATTR_RW(temp15_alarm, temp_alarm, 14);
static SENSOR_DEVICE_ATTR_RW(temp16_alarm, temp_alarm, 15);
static struct attribute *fts_temp_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp4_input.dev_attr.attr,
&sensor_dev_attr_temp5_input.dev_attr.attr,
&sensor_dev_attr_temp6_input.dev_attr.attr,
&sensor_dev_attr_temp7_input.dev_attr.attr,
&sensor_dev_attr_temp8_input.dev_attr.attr,
&sensor_dev_attr_temp9_input.dev_attr.attr,
&sensor_dev_attr_temp10_input.dev_attr.attr,
&sensor_dev_attr_temp11_input.dev_attr.attr,
&sensor_dev_attr_temp12_input.dev_attr.attr,
&sensor_dev_attr_temp13_input.dev_attr.attr,
&sensor_dev_attr_temp14_input.dev_attr.attr,
&sensor_dev_attr_temp15_input.dev_attr.attr,
&sensor_dev_attr_temp16_input.dev_attr.attr,
&sensor_dev_attr_temp1_fault.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&sensor_dev_attr_temp3_fault.dev_attr.attr,
&sensor_dev_attr_temp4_fault.dev_attr.attr,
&sensor_dev_attr_temp5_fault.dev_attr.attr,
&sensor_dev_attr_temp6_fault.dev_attr.attr,
&sensor_dev_attr_temp7_fault.dev_attr.attr,
&sensor_dev_attr_temp8_fault.dev_attr.attr,
&sensor_dev_attr_temp9_fault.dev_attr.attr,
&sensor_dev_attr_temp10_fault.dev_attr.attr,
&sensor_dev_attr_temp11_fault.dev_attr.attr,
&sensor_dev_attr_temp12_fault.dev_attr.attr,
&sensor_dev_attr_temp13_fault.dev_attr.attr,
&sensor_dev_attr_temp14_fault.dev_attr.attr,
&sensor_dev_attr_temp15_fault.dev_attr.attr,
&sensor_dev_attr_temp16_fault.dev_attr.attr,
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
&sensor_dev_attr_temp4_alarm.dev_attr.attr,
&sensor_dev_attr_temp5_alarm.dev_attr.attr,
&sensor_dev_attr_temp6_alarm.dev_attr.attr,
&sensor_dev_attr_temp7_alarm.dev_attr.attr,
&sensor_dev_attr_temp8_alarm.dev_attr.attr,
&sensor_dev_attr_temp9_alarm.dev_attr.attr,
&sensor_dev_attr_temp10_alarm.dev_attr.attr,
&sensor_dev_attr_temp11_alarm.dev_attr.attr,
&sensor_dev_attr_temp12_alarm.dev_attr.attr,
&sensor_dev_attr_temp13_alarm.dev_attr.attr,
&sensor_dev_attr_temp14_alarm.dev_attr.attr,
&sensor_dev_attr_temp15_alarm.dev_attr.attr,
&sensor_dev_attr_temp16_alarm.dev_attr.attr,
NULL
};
/* Fans */
static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_value, 0);
static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_value, 1);
static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_value, 2);
static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_value, 3);
static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_value, 4);
static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_value, 5);
static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_value, 6);
static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_value, 7);
static SENSOR_DEVICE_ATTR_RO(fan1_source, fan_source, 0);
static SENSOR_DEVICE_ATTR_RO(fan2_source, fan_source, 1);
static SENSOR_DEVICE_ATTR_RO(fan3_source, fan_source, 2);
static SENSOR_DEVICE_ATTR_RO(fan4_source, fan_source, 3);
static SENSOR_DEVICE_ATTR_RO(fan5_source, fan_source, 4);
static SENSOR_DEVICE_ATTR_RO(fan6_source, fan_source, 5);
static SENSOR_DEVICE_ATTR_RO(fan7_source, fan_source, 6);
static SENSOR_DEVICE_ATTR_RO(fan8_source, fan_source, 7);
static SENSOR_DEVICE_ATTR_RW(fan1_alarm, fan_alarm, 0);
static SENSOR_DEVICE_ATTR_RW(fan2_alarm, fan_alarm, 1);
static SENSOR_DEVICE_ATTR_RW(fan3_alarm, fan_alarm, 2);
static SENSOR_DEVICE_ATTR_RW(fan4_alarm, fan_alarm, 3);
static SENSOR_DEVICE_ATTR_RW(fan5_alarm, fan_alarm, 4);
static SENSOR_DEVICE_ATTR_RW(fan6_alarm, fan_alarm, 5);
static SENSOR_DEVICE_ATTR_RW(fan7_alarm, fan_alarm, 6);
static SENSOR_DEVICE_ATTR_RW(fan8_alarm, fan_alarm, 7);
static struct attribute *fts_fan_attrs[] = {
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan2_input.dev_attr.attr,
&sensor_dev_attr_fan3_input.dev_attr.attr,
&sensor_dev_attr_fan4_input.dev_attr.attr,
&sensor_dev_attr_fan5_input.dev_attr.attr,
&sensor_dev_attr_fan6_input.dev_attr.attr,
&sensor_dev_attr_fan7_input.dev_attr.attr,
&sensor_dev_attr_fan8_input.dev_attr.attr,
&sensor_dev_attr_fan1_source.dev_attr.attr,
&sensor_dev_attr_fan2_source.dev_attr.attr,
&sensor_dev_attr_fan3_source.dev_attr.attr,
&sensor_dev_attr_fan4_source.dev_attr.attr,
&sensor_dev_attr_fan5_source.dev_attr.attr,
&sensor_dev_attr_fan6_source.dev_attr.attr,
&sensor_dev_attr_fan7_source.dev_attr.attr,
&sensor_dev_attr_fan8_source.dev_attr.attr,
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
&sensor_dev_attr_fan3_alarm.dev_attr.attr,
&sensor_dev_attr_fan4_alarm.dev_attr.attr,
&sensor_dev_attr_fan5_alarm.dev_attr.attr,
&sensor_dev_attr_fan6_alarm.dev_attr.attr,
&sensor_dev_attr_fan7_alarm.dev_attr.attr,
&sensor_dev_attr_fan8_alarm.dev_attr.attr,
NULL
};
/* Voltages */
static SENSOR_DEVICE_ATTR_RO(in1_input, in_value, 0);
static SENSOR_DEVICE_ATTR_RO(in2_input, in_value, 1);
static SENSOR_DEVICE_ATTR_RO(in3_input, in_value, 2);
static SENSOR_DEVICE_ATTR_RO(in4_input, in_value, 3);
static struct attribute *fts_voltage_attrs[] = {
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in4_input.dev_attr.attr,
NULL
};
static const struct attribute_group fts_voltage_attr_group = {
.attrs = fts_voltage_attrs
};
static const struct attribute_group fts_temp_attr_group = {
.attrs = fts_temp_attrs
};
static const struct attribute_group fts_fan_attr_group = {
.attrs = fts_fan_attrs
};
static const struct attribute_group *fts_attr_groups[] = {
&fts_voltage_attr_group,
&fts_temp_attr_group,
&fts_fan_attr_group,
NULL
};
/*****************************************************************************/
/* Module initialization / remove functions */
/*****************************************************************************/
static int fts_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
int val;
/* detection works with revsion greater or equal to 0x2b */
val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
if (val < 0x2b)
return -ENODEV;
/* Device Detect Regs must have 0x17 0x34 and 0x54 */
val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1);
if (val != 0x17)
return -ENODEV;
val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2);
if (val != 0x34)
return -ENODEV;
val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3);
if (val != 0x54)
return -ENODEV;
/*
* 0x10 == Baseboard Management Controller, 0x01 == Teutates
* Device ID Reg needs to be 0x11
*/
val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
if (val != 0x11)
return -ENODEV;
strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE);
info->flags = 0;
return 0;
}
static int fts_remove(struct i2c_client *client)
{
struct fts_data *data = dev_get_drvdata(&client->dev);
watchdog_unregister_device(&data->wdd);
return 0;
}
static int fts_probe(struct i2c_client *client)
{
u8 revision;
struct fts_data *data;
int err;
s8 deviceid;
struct device *hwmon_dev;
if (client->addr != 0x73)
return -ENODEV;
/* Baseboard Management Controller check */
deviceid = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
if (deviceid > 0 && (deviceid & 0xF0) == 0x10) {
switch (deviceid & 0x0F) {
case 0x01:
break;
default:
dev_dbg(&client->dev,
"No Baseboard Management Controller\n");
return -ENODEV;
}
} else {
dev_dbg(&client->dev, "No fujitsu board\n");
return -ENODEV;
}
data = devm_kzalloc(&client->dev, sizeof(struct fts_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
mutex_init(&data->update_lock);
mutex_init(&data->access_lock);
data->client = client;
dev_set_drvdata(&client->dev, data);
err = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
if (err < 0)
return err;
revision = err;
hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
"ftsteutates",
data,
fts_attr_groups);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
err = fts_watchdog_init(data);
if (err)
return err;
dev_info(&client->dev, "Detected FTS Teutates chip, revision: %d.%d\n",
(revision & 0xF0) >> 4, revision & 0x0F);
return 0;
}
/*****************************************************************************/
/* Module Details */
/*****************************************************************************/
static struct i2c_driver fts_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "ftsteutates",
},
.id_table = fts_id,
.probe_new = fts_probe,
.remove = fts_remove,
.detect = fts_detect,
.address_list = normal_i2c,
};
module_i2c_driver(fts_driver);
MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>");
MODULE_DESCRIPTION("FTS Teutates driver");
MODULE_LICENSE("GPL");
Reference in a new issue View git blame Copy permalink