| Message ID | 1467724681-8790-1-git-send-email-thilo.cestonaro@ts.fujitsu.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On 07/05/2016 06:18 AM, Thilo Cestonaro wrote: > From: Thilo Cestonaro <thilo@cestona.ro> > > This driver implements support for the FTS BMC Chip "Teutates". > > Signed-off-by: Thilo Cestonaro <thilo@cestona.ro> > --- A change log would be useful here. As it is, I have to go back to the previous version and check my notes, which takes additional time. Effectively I have to do a complete review from scratch. Not that this is a bad idea, but it takes time and may delay a response significantly. Not a complete review this time. Not checking my notes, but it seems to me that the function to set the timeout was not there last time. I only looked at that function. > Documentation/hwmon/ftsteutates | 23 ++ > drivers/hwmon/Kconfig | 11 + > drivers/hwmon/Makefile | 1 + > drivers/hwmon/ftsteutates.c | 799 ++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 834 insertions(+) > create mode 100644 Documentation/hwmon/ftsteutates > create mode 100644 drivers/hwmon/ftsteutates.c > > diff --git a/Documentation/hwmon/ftsteutates b/Documentation/hwmon/ftsteutates > new file mode 100644 > index 0000000..2a1bf69 > --- /dev/null > +++ b/Documentation/hwmon/ftsteutates > @@ -0,0 +1,23 @@ > +Kernel driver ftsteutates > +===================== > + > +Supported chips: > + * FTS Teutates > + Prefix: 'ftsteutates' > + Addresses scanned: I2C 0x73 (7-Bit) > + > +Author: Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com> > + > + > +Description > +----------- > +The BMC Teutates is the Eleventh generation of Superior System > +monitoring and thermal management solution. It is builds on the basic > +functionality of the BMC Theseus and contains several new features and > +enhancements. It can monitor up to 4 voltages, 16 temperatures and > +8 fans. It also contains an integrated watchdog which is currently > +implemented in this driver. > + > +Specification of the chip can be found here: > +ftp:///pub/Mainboard-OEM-Sales/Services/Software&Tools/Linux_SystemMonitoring&Watchdog&GPIO/BMC-Teutates_Specification_V1.21.pdf > +ftp:///pub/Mainboard-OEM-Sales/Services/Software&Tools/Linux_SystemMonitoring&Watchdog&GPIO/Fujitsu_mainboards-1-Sensors_HowTo-en-US.pdf > diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig > index ff94007..fd6234c 100644 > --- a/drivers/hwmon/Kconfig > +++ b/drivers/hwmon/Kconfig > @@ -486,6 +486,17 @@ config SENSORS_FSCHMD > This driver can also be built as a module. If so, the module > will be called fschmd. > > +config SENSORS_FTSTEUTATES > + tristate "Fujitsu Technology Solutions sensor chip Teutates" > + depends on I2C > + help > + If you say yes here you get support for the Fujitsu Technology > + Solutions (FTS) sensor chip "Teutates" including support for > + the integrated watchdog. > + > + This driver can also be built as a module. If so, the module > + will be called ftsteutates. > + > config SENSORS_GL518SM > tristate "Genesys Logic GL518SM" > depends on I2C > diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile > index 2ef5b7c..dcad5f7 100644 > --- a/drivers/hwmon/Makefile > +++ b/drivers/hwmon/Makefile > @@ -62,6 +62,7 @@ obj-$(CONFIG_SENSORS_F71882FG) += f71882fg.o > obj-$(CONFIG_SENSORS_F75375S) += f75375s.o > obj-$(CONFIG_SENSORS_FAM15H_POWER) += fam15h_power.o > obj-$(CONFIG_SENSORS_FSCHMD) += fschmd.o > +obj-$(CONFIG_SENSORS_FTSTEUTATES) += ftsteutates.o > obj-$(CONFIG_SENSORS_G760A) += g760a.o > obj-$(CONFIG_SENSORS_G762) += g762.o > obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o > diff --git a/drivers/hwmon/ftsteutates.c b/drivers/hwmon/ftsteutates.c > new file mode 100644 > index 0000000..2baccaa > --- /dev/null > +++ b/drivers/hwmon/ftsteutates.c > @@ -0,0 +1,799 @@ > +/* > + * fts.c, Support for the FTS Systemmonitoring Chip "Teutates" > + * > + * Copyright (C) 2016 Fujitsu Technology Solutions GmbH, > + * Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com> > + * > + * 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. > + * > + */ > +#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/version.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_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 struct i2c_device_id fts_id[] = { > + { "ftsteutates", 0 }, > + { } > +}; > +MODULE_DEVICE_TABLE(i2c, fts_id); > + > +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; > + 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, bool seconds) > +{ > + int ret; > + > + ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL); > + if (ret < 0) > + return ret; > + > + ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, > + seconds ? ret | BIT(1) : ret & ~BIT(1)); > + if (ret < 0) > + return ret; > + > + return 0; A simple return ret; would accomplish the same. > +} > + > +static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout) > +{ > + struct fts_data *data; > + bool seconds; > + > + data = watchdog_get_drvdata(wdd); > + > + /* switch watchdog resolution to minutes if timeout does not fit > + * into a byte > + */ > + if (timeout > 0xFF) { > + wdd->timeout = DIV_ROUND_UP(timeout, 60); > + if (wdd->timeout > wdd->max_timeout) { The requested timeout will never be larger than wdd->max_timeout, so this check is unnecessary as long as wdd->max_timeout is set correctly. > + dev_warn(wdd->parent, > + "given timeout to big, using max_timeout\n"); > + wdd->timeout = wdd->max_timeout / 60; ... and this is wrong. wdd->timeout is still in seconds. > + } > + seconds = false; > + } else { > + wdd->timeout = timeout; > + seconds = true; > + } > + > + return fts_wd_set_resolution(data, seconds); > +} > + > +static int fts_wd_start(struct watchdog_device *wdd) > +{ > + struct fts_data *data; > + > + data = watchdog_get_drvdata(wdd); > + return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, > + wdd->timeout); > +} > + > +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, Is WDIOF_MAGICCLOSE not set on purpose ? > + .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) { > + /* resolution = seconds */ > + ret = fts_wd_set_resolution(data, true); > + 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->wdd.timeout = (ret & BIT(1) ? 1 : 60) * timeout; > + data->wdd.status |= BIT(WDOG_HW_RUNNING); > + } > + > + /* 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; > + data->wdd.max_timeout = 0xFF * 60; /* max timeout 255 minutes. */ > + return watchdog_register_device(&data->wdd); > +} > + > +/*****************************************************************************/ > +/* SysFS handler functions */ > +/*****************************************************************************/ > +static ssize_t show_in_value(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 show_temp_value(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 show_temp_fault(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 show_temp_alarm(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 > +clear_temp_alarm(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; > +error: > + mutex_unlock(&data->update_lock); > + return ret; > +} > + > +static ssize_t show_fan_value(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 show_fan_source(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 show_fan_alarm(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 > +clear_fan_alarm(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; > +error: > + mutex_unlock(&data->update_lock); > + return ret; > +} > + > +/*****************************************************************************/ > +/* SysFS structs */ > +/*****************************************************************************/ > + > +/* Temprature sensors */ > +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_value, NULL, 0); > +static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_value, NULL, 1); > +static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_value, NULL, 2); > +static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_value, NULL, 3); > +static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_value, NULL, 4); > +static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_value, NULL, 5); > +static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp_value, NULL, 6); > +static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp_value, NULL, 7); > +static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp_value, NULL, 8); > +static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp_value, NULL, 9); > +static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO, show_temp_value, NULL, 10); > +static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO, show_temp_value, NULL, 11); > +static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO, show_temp_value, NULL, 12); > +static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO, show_temp_value, NULL, 13); > +static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO, show_temp_value, NULL, 14); > +static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO, show_temp_value, NULL, 15); > + > +static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0); > +static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1); > +static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2); > +static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3); > +static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4); > +static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5); > +static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6); > +static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7); > +static SENSOR_DEVICE_ATTR(temp9_fault, S_IRUGO, show_temp_fault, NULL, 8); > +static SENSOR_DEVICE_ATTR(temp10_fault, S_IRUGO, show_temp_fault, NULL, 9); > +static SENSOR_DEVICE_ATTR(temp11_fault, S_IRUGO, show_temp_fault, NULL, 10); > +static SENSOR_DEVICE_ATTR(temp12_fault, S_IRUGO, show_temp_fault, NULL, 11); > +static SENSOR_DEVICE_ATTR(temp13_fault, S_IRUGO, show_temp_fault, NULL, 12); > +static SENSOR_DEVICE_ATTR(temp14_fault, S_IRUGO, show_temp_fault, NULL, 13); > +static SENSOR_DEVICE_ATTR(temp15_fault, S_IRUGO, show_temp_fault, NULL, 14); > +static SENSOR_DEVICE_ATTR(temp16_fault, S_IRUGO, show_temp_fault, NULL, 15); > + > +static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 0); > +static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 1); > +static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 2); > +static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 3); > +static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 4); > +static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 5); > +static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 6); > +static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 7); > +static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 8); > +static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 9); > +static SENSOR_DEVICE_ATTR(temp11_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 10); > +static SENSOR_DEVICE_ATTR(temp12_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 11); > +static SENSOR_DEVICE_ATTR(temp13_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 12); > +static SENSOR_DEVICE_ATTR(temp14_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 13); > +static SENSOR_DEVICE_ATTR(temp15_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_temp_alarm, 14); > +static SENSOR_DEVICE_ATTR(temp16_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, > + clear_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(fan1_input, S_IRUGO, show_fan_value, NULL, 0); > +static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_value, NULL, 1); > +static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_value, NULL, 2); > +static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_value, NULL, 3); > +static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_value, NULL, 4); > +static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_value, NULL, 5); > +static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_value, NULL, 6); > +static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_value, NULL, 7); > + > +static SENSOR_DEVICE_ATTR(fan1_source, S_IRUGO, show_fan_source, NULL, 0); > +static SENSOR_DEVICE_ATTR(fan2_source, S_IRUGO, show_fan_source, NULL, 1); > +static SENSOR_DEVICE_ATTR(fan3_source, S_IRUGO, show_fan_source, NULL, 2); > +static SENSOR_DEVICE_ATTR(fan4_source, S_IRUGO, show_fan_source, NULL, 3); > +static SENSOR_DEVICE_ATTR(fan5_source, S_IRUGO, show_fan_source, NULL, 4); > +static SENSOR_DEVICE_ATTR(fan6_source, S_IRUGO, show_fan_source, NULL, 5); > +static SENSOR_DEVICE_ATTR(fan7_source, S_IRUGO, show_fan_source, NULL, 6); > +static SENSOR_DEVICE_ATTR(fan8_source, S_IRUGO, show_fan_source, NULL, 7); > + > +static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO | S_IWUSR, > + show_fan_alarm, clear_fan_alarm, 0); > +static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO | S_IWUSR, > + show_fan_alarm, clear_fan_alarm, 1); > +static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO | S_IWUSR, > + show_fan_alarm, clear_fan_alarm, 2); > +static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO | S_IWUSR, > + show_fan_alarm, clear_fan_alarm, 3); > +static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO | S_IWUSR, > + show_fan_alarm, clear_fan_alarm, 4); > +static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO | S_IWUSR, > + show_fan_alarm, clear_fan_alarm, 5); > +static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO | S_IWUSR, > + show_fan_alarm, clear_fan_alarm, 6); > +static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO | S_IWUSR, > + show_fan_alarm, clear_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(in1_input, S_IRUGO, show_in_value, NULL, 0); > +static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_value, NULL, 1); > +static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_value, NULL, 2); > +static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_value, NULL, 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_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, const struct i2c_device_id *id) > +{ > + 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 = { > + .driver = { > + .name = "ftsteutates", > + }, > + .id_table = fts_id, > + .probe = fts_probe, > + .remove = fts_remove, > +}; > + > +module_i2c_driver(fts_driver); > + > +MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>"); > +MODULE_DESCRIPTION("FTS Teutates driver"); > +MODULE_LICENSE("GPL"); > -- To unsubscribe from this list: send the line "unsubscribe linux-hwmon" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/hwmon/ftsteutates b/Documentation/hwmon/ftsteutates new file mode 100644 index 0000000..2a1bf69 --- /dev/null +++ b/Documentation/hwmon/ftsteutates @@ -0,0 +1,23 @@ +Kernel driver ftsteutates +===================== + +Supported chips: + * FTS Teutates + Prefix: 'ftsteutates' + Addresses scanned: I2C 0x73 (7-Bit) + +Author: Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com> + + +Description +----------- +The BMC Teutates is the Eleventh generation of Superior System +monitoring and thermal management solution. It is builds on the basic +functionality of the BMC Theseus and contains several new features and +enhancements. It can monitor up to 4 voltages, 16 temperatures and +8 fans. It also contains an integrated watchdog which is currently +implemented in this driver. + +Specification of the chip can be found here: +ftp:///pub/Mainboard-OEM-Sales/Services/Software&Tools/Linux_SystemMonitoring&Watchdog&GPIO/BMC-Teutates_Specification_V1.21.pdf +ftp:///pub/Mainboard-OEM-Sales/Services/Software&Tools/Linux_SystemMonitoring&Watchdog&GPIO/Fujitsu_mainboards-1-Sensors_HowTo-en-US.pdf diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index ff94007..fd6234c 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -486,6 +486,17 @@ config SENSORS_FSCHMD This driver can also be built as a module. If so, the module will be called fschmd. +config SENSORS_FTSTEUTATES + tristate "Fujitsu Technology Solutions sensor chip Teutates" + depends on I2C + help + If you say yes here you get support for the Fujitsu Technology + Solutions (FTS) sensor chip "Teutates" including support for + the integrated watchdog. + + This driver can also be built as a module. If so, the module + will be called ftsteutates. + config SENSORS_GL518SM tristate "Genesys Logic GL518SM" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 2ef5b7c..dcad5f7 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -62,6 +62,7 @@ obj-$(CONFIG_SENSORS_F71882FG) += f71882fg.o obj-$(CONFIG_SENSORS_F75375S) += f75375s.o obj-$(CONFIG_SENSORS_FAM15H_POWER) += fam15h_power.o obj-$(CONFIG_SENSORS_FSCHMD) += fschmd.o +obj-$(CONFIG_SENSORS_FTSTEUTATES) += ftsteutates.o obj-$(CONFIG_SENSORS_G760A) += g760a.o obj-$(CONFIG_SENSORS_G762) += g762.o obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o diff --git a/drivers/hwmon/ftsteutates.c b/drivers/hwmon/ftsteutates.c new file mode 100644 index 0000000..2baccaa --- /dev/null +++ b/drivers/hwmon/ftsteutates.c @@ -0,0 +1,799 @@ +/* + * fts.c, Support for the FTS Systemmonitoring Chip "Teutates" + * + * Copyright (C) 2016 Fujitsu Technology Solutions GmbH, + * Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com> + * + * 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. + * + */ +#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/version.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_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 struct i2c_device_id fts_id[] = { + { "ftsteutates", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, fts_id); + +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; + 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, bool seconds) +{ + int ret; + + ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL); + if (ret < 0) + return ret; + + ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, + seconds ? ret | BIT(1) : ret & ~BIT(1)); + if (ret < 0) + return ret; + + return 0; +} + +static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout) +{ + struct fts_data *data; + bool seconds; + + data = watchdog_get_drvdata(wdd); + + /* switch watchdog resolution to minutes if timeout does not fit + * into a byte + */ + if (timeout > 0xFF) { + wdd->timeout = DIV_ROUND_UP(timeout, 60); + if (wdd->timeout > wdd->max_timeout) { + dev_warn(wdd->parent, + "given timeout to big, using max_timeout\n"); + wdd->timeout = wdd->max_timeout / 60; + } + seconds = false; + } else { + wdd->timeout = timeout; + seconds = true; + } + + return fts_wd_set_resolution(data, seconds); +} + +static int fts_wd_start(struct watchdog_device *wdd) +{ + struct fts_data *data; + + data = watchdog_get_drvdata(wdd); + return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, + wdd->timeout); +} + +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, + .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) { + /* resolution = seconds */ + ret = fts_wd_set_resolution(data, true); + 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->wdd.timeout = (ret & BIT(1) ? 1 : 60) * timeout; + data->wdd.status |= BIT(WDOG_HW_RUNNING); + } + + /* 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; + data->wdd.max_timeout = 0xFF * 60; /* max timeout 255 minutes. */ + return watchdog_register_device(&data->wdd); +} + +/*****************************************************************************/ +/* SysFS handler functions */ +/*****************************************************************************/ +static ssize_t show_in_value(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 show_temp_value(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 show_temp_fault(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 show_temp_alarm(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 +clear_temp_alarm(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; +error: + mutex_unlock(&data->update_lock); + return ret; +} + +static ssize_t show_fan_value(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 show_fan_source(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 show_fan_alarm(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 +clear_fan_alarm(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; +error: + mutex_unlock(&data->update_lock); + return ret; +} + +/*****************************************************************************/ +/* SysFS structs */ +/*****************************************************************************/ + +/* Temprature sensors */ +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_value, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_value, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_value, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_value, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_value, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_value, NULL, 5); +static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp_value, NULL, 6); +static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp_value, NULL, 7); +static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp_value, NULL, 8); +static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp_value, NULL, 9); +static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO, show_temp_value, NULL, 10); +static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO, show_temp_value, NULL, 11); +static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO, show_temp_value, NULL, 12); +static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO, show_temp_value, NULL, 13); +static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO, show_temp_value, NULL, 14); +static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO, show_temp_value, NULL, 15); + +static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0); +static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2); +static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3); +static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4); +static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5); +static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6); +static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7); +static SENSOR_DEVICE_ATTR(temp9_fault, S_IRUGO, show_temp_fault, NULL, 8); +static SENSOR_DEVICE_ATTR(temp10_fault, S_IRUGO, show_temp_fault, NULL, 9); +static SENSOR_DEVICE_ATTR(temp11_fault, S_IRUGO, show_temp_fault, NULL, 10); +static SENSOR_DEVICE_ATTR(temp12_fault, S_IRUGO, show_temp_fault, NULL, 11); +static SENSOR_DEVICE_ATTR(temp13_fault, S_IRUGO, show_temp_fault, NULL, 12); +static SENSOR_DEVICE_ATTR(temp14_fault, S_IRUGO, show_temp_fault, NULL, 13); +static SENSOR_DEVICE_ATTR(temp15_fault, S_IRUGO, show_temp_fault, NULL, 14); +static SENSOR_DEVICE_ATTR(temp16_fault, S_IRUGO, show_temp_fault, NULL, 15); + +static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 0); +static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 1); +static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 2); +static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 3); +static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 4); +static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 5); +static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 6); +static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 7); +static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 8); +static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 9); +static SENSOR_DEVICE_ATTR(temp11_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 10); +static SENSOR_DEVICE_ATTR(temp12_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 11); +static SENSOR_DEVICE_ATTR(temp13_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 12); +static SENSOR_DEVICE_ATTR(temp14_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 13); +static SENSOR_DEVICE_ATTR(temp15_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_temp_alarm, 14); +static SENSOR_DEVICE_ATTR(temp16_alarm, S_IRUGO | S_IWUSR, show_temp_alarm, + clear_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(fan1_input, S_IRUGO, show_fan_value, NULL, 0); +static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_value, NULL, 1); +static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_value, NULL, 2); +static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_value, NULL, 3); +static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_value, NULL, 4); +static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_value, NULL, 5); +static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_value, NULL, 6); +static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_value, NULL, 7); + +static SENSOR_DEVICE_ATTR(fan1_source, S_IRUGO, show_fan_source, NULL, 0); +static SENSOR_DEVICE_ATTR(fan2_source, S_IRUGO, show_fan_source, NULL, 1); +static SENSOR_DEVICE_ATTR(fan3_source, S_IRUGO, show_fan_source, NULL, 2); +static SENSOR_DEVICE_ATTR(fan4_source, S_IRUGO, show_fan_source, NULL, 3); +static SENSOR_DEVICE_ATTR(fan5_source, S_IRUGO, show_fan_source, NULL, 4); +static SENSOR_DEVICE_ATTR(fan6_source, S_IRUGO, show_fan_source, NULL, 5); +static SENSOR_DEVICE_ATTR(fan7_source, S_IRUGO, show_fan_source, NULL, 6); +static SENSOR_DEVICE_ATTR(fan8_source, S_IRUGO, show_fan_source, NULL, 7); + +static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO | S_IWUSR, + show_fan_alarm, clear_fan_alarm, 0); +static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO | S_IWUSR, + show_fan_alarm, clear_fan_alarm, 1); +static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO | S_IWUSR, + show_fan_alarm, clear_fan_alarm, 2); +static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO | S_IWUSR, + show_fan_alarm, clear_fan_alarm, 3); +static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO | S_IWUSR, + show_fan_alarm, clear_fan_alarm, 4); +static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO | S_IWUSR, + show_fan_alarm, clear_fan_alarm, 5); +static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO | S_IWUSR, + show_fan_alarm, clear_fan_alarm, 6); +static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO | S_IWUSR, + show_fan_alarm, clear_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(in1_input, S_IRUGO, show_in_value, NULL, 0); +static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_value, NULL, 1); +static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_value, NULL, 2); +static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_value, NULL, 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_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, const struct i2c_device_id *id) +{ + 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 = { + .driver = { + .name = "ftsteutates", + }, + .id_table = fts_id, + .probe = fts_probe, + .remove = fts_remove, +}; + +module_i2c_driver(fts_driver); + +MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>"); +MODULE_DESCRIPTION("FTS Teutates driver"); +MODULE_LICENSE("GPL");