diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/Kconfig | 20 | ||||
| -rw-r--r-- | drivers/hwmon/Makefile | 2 | ||||
| -rw-r--r-- | drivers/hwmon/adt7310.c | 123 | ||||
| -rw-r--r-- | drivers/hwmon/adt7410.c | 467 | ||||
| -rw-r--r-- | drivers/hwmon/adt7x10.c | 476 | ||||
| -rw-r--r-- | drivers/hwmon/adt7x10.h | 37 |
6 files changed, 689 insertions, 436 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 89ac1cb26f24..aaa14f4a0f7d 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -179,9 +179,29 @@ config SENSORS_ADM9240 This driver can also be built as a module. If so, the module will be called adm9240. +config SENSORS_ADT7X10 + tristate + help + This module contains common code shared by the ADT7310/ADT7320 and + ADT7410/ADT7420 temperature monitoring chip drivers. + + If build as a module, the module will be called adt7x10. + +config SENSORS_ADT7310 + tristate "Analog Devices ADT7310/ADT7320" + depends on SPI_MASTER + select SENSORS_ADT7X10 + help + If you say yes here you get support for the Analog Devices + ADT7310 and ADT7320 temperature monitoring chips. + + This driver can also be built as a module. If so, the module + will be called adt7310. + config SENSORS_ADT7410 tristate "Analog Devices ADT7410/ADT7420" depends on I2C + select SENSORS_ADT7X10 help If you say yes here you get support for the Analog Devices ADT7410 and ADT7420 temperature monitoring chips. diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 8d6d97ea7c1e..5d36a57c055b 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -34,6 +34,8 @@ obj-$(CONFIG_SENSORS_ADM9240) += adm9240.o obj-$(CONFIG_SENSORS_ADS1015) += ads1015.o obj-$(CONFIG_SENSORS_ADS7828) += ads7828.o obj-$(CONFIG_SENSORS_ADS7871) += ads7871.o +obj-$(CONFIG_SENSORS_ADT7X10) += adt7x10.o +obj-$(CONFIG_SENSORS_ADT7310) += adt7310.o obj-$(CONFIG_SENSORS_ADT7410) += adt7410.o obj-$(CONFIG_SENSORS_ADT7411) += adt7411.o obj-$(CONFIG_SENSORS_ADT7462) += adt7462.o diff --git a/drivers/hwmon/adt7310.c b/drivers/hwmon/adt7310.c new file mode 100644 index 000000000000..f8ea6292bc74 --- /dev/null +++ b/drivers/hwmon/adt7310.c @@ -0,0 +1,123 @@ +/* + * ADT7310/ADT7310 digital temperature sensor driver + * + * Copyright 2012-2013 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/spi/spi.h> +#include <asm/unaligned.h> + +#include "adt7x10.h" + +#define ADT7310_STATUS 0 +#define ADT7310_CONFIG 1 +#define ADT7310_TEMPERATURE 2 +#define ADT7310_ID 3 +#define ADT7310_T_CRIT 4 +#define ADT7310_T_HYST 5 +#define ADT7310_T_ALARM_HIGH 6 +#define ADT7310_T_ALARM_LOW 7 + +static const u8 adt7310_reg_table[] = { + [ADT7X10_TEMPERATURE] = ADT7310_TEMPERATURE, + [ADT7X10_STATUS] = ADT7310_STATUS, + [ADT7X10_CONFIG] = ADT7310_CONFIG, + [ADT7X10_T_ALARM_HIGH] = ADT7310_T_ALARM_HIGH, + [ADT7X10_T_ALARM_LOW] = ADT7310_T_ALARM_LOW, + [ADT7X10_T_CRIT] = ADT7310_T_CRIT, + [ADT7X10_T_HYST] = ADT7310_T_HYST, + [ADT7X10_ID] = ADT7310_ID, +}; + +#define ADT7310_CMD_REG_OFFSET 3 +#define ADT7310_CMD_READ 0x40 + +#define AD7310_COMMAND(reg) (adt7310_reg_table[(reg)] << ADT7310_CMD_REG_OFFSET) + +static int adt7310_spi_read_word(struct device *dev, u8 reg) +{ + struct spi_device *spi = to_spi_device(dev); + int ret; + + ret = spi_w8r16(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ); + if (ret < 0) + return ret; + + return be16_to_cpu(ret); +} + +static int adt7310_spi_write_word(struct device *dev, u8 reg, u16 data) +{ + struct spi_device *spi = to_spi_device(dev); + u8 buf[3]; + + buf[0] = AD7310_COMMAND(reg); + put_unaligned_be16(data, &buf[1]); + + return spi_write(spi, buf, sizeof(buf)); +} + +static int adt7310_spi_read_byte(struct device *dev, u8 reg) +{ + struct spi_device *spi = to_spi_device(dev); + + return spi_w8r8(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ); +} + +static int adt7310_spi_write_byte(struct device *dev, u8 reg, + u8 data) +{ + struct spi_device *spi = to_spi_device(dev); + u8 buf[2]; + + buf[0] = AD7310_COMMAND(reg); + buf[1] = data; + + return spi_write(spi, buf, sizeof(buf)); +} + +static const struct adt7x10_ops adt7310_spi_ops = { + .read_word = adt7310_spi_read_word, + .write_word = adt7310_spi_write_word, + .read_byte = adt7310_spi_read_byte, + .write_byte = adt7310_spi_write_byte, +}; + +static int adt7310_spi_probe(struct spi_device *spi) +{ + return adt7x10_probe(&spi->dev, spi_get_device_id(spi)->name, + &adt7310_spi_ops); +} + +static int adt7310_spi_remove(struct spi_device *spi) +{ + return adt7x10_remove(&spi->dev); +} + +static const struct spi_device_id adt7310_id[] = { + { "adt7310", 0 }, + { "adt7320", 0 }, + {} +}; +MODULE_DEVICE_TABLE(spi, adt7310_id); + +static struct spi_driver adt7310_driver = { + .driver = { + .name = "adt7310", + .owner = THIS_MODULE, + .pm = ADT7X10_DEV_PM_OPS, + }, + .probe = adt7310_spi_probe, + .remove = adt7310_spi_remove, + .id_table = adt7310_id, +}; +module_spi_driver(adt7310_driver); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("ADT7310/ADT7320 driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/hwmon/adt7410.c b/drivers/hwmon/adt7410.c index 894ff71499b3..d294445c86dd 100644 --- a/drivers/hwmon/adt7410.c +++ b/drivers/hwmon/adt7410.c @@ -1,485 +1,80 @@ /* - * adt7410.c - Part of lm_sensors, Linux kernel modules for hardware - * monitoring - * This driver handles the ADT7410 and compatible digital temperature sensors. - * Hartmut Knaack <knaack.h@gmx.de> 2012-07-22 - * based on lm75.c by Frodo Looijaard <frodol@dds.nl> - * and adt7410.c from iio-staging by Sonic Zhang <sonic.zhang@analog.com> + * ADT7410/ADT7420 digital temperature sensor driver * - * 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. + * Copyright 2012-2013 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Licensed under the GPL-2 or later. */ #include <linux/module.h> #include <linux/init.h> -#include <linux/slab.h> -#include <linux/jiffies.h> #include <linux/i2c.h> -#include <linux/hwmon.h> -#include <linux/hwmon-sysfs.h> -#include <linux/err.h> -#include <linux/mutex.h> -#include <linux/delay.h> - -/* - * ADT7410 registers definition - */ - -#define ADT7410_TEMPERATURE 0 -#define ADT7410_STATUS 2 -#define ADT7410_CONFIG 3 -#define ADT7410_T_ALARM_HIGH 4 -#define ADT7410_T_ALARM_LOW 6 -#define ADT7410_T_CRIT 8 -#define ADT7410_T_HYST 0xA - -/* - * ADT7410 status - */ -#define ADT7410_STAT_T_LOW (1 << 4) -#define ADT7410_STAT_T_HIGH (1 << 5) -#define ADT7410_STAT_T_CRIT (1 << 6) -#define ADT7410_STAT_NOT_RDY (1 << 7) - -/* - * ADT7410 config - */ -#define ADT7410_FAULT_QUEUE_MASK (1 << 0 | 1 << 1) -#define ADT7410_CT_POLARITY (1 << 2) -#define ADT7410_INT_POLARITY (1 << 3) -#define ADT7410_EVENT_MODE (1 << 4) -#define ADT7410_MODE_MASK (1 << 5 | 1 << 6) -#define ADT7410_FULL (0 << 5 | 0 << 6) -#define ADT7410_PD (1 << 5 | 1 << 6) -#define ADT7410_RESOLUTION (1 << 7) - -/* - * ADT7410 masks - */ -#define ADT7410_T13_VALUE_MASK 0xFFF8 -#define ADT7410_T_HYST_MASK 0xF - -/* straight from the datasheet */ -#define ADT7410_TEMP_MIN (-55000) -#define ADT7410_TEMP_MAX 150000 - -enum adt7410_type { /* keep sorted in alphabetical order */ - adt7410, -}; - -static const u8 ADT7410_REG_TEMP[4] = { - ADT7410_TEMPERATURE, /* input */ - ADT7410_T_ALARM_HIGH, /* high */ - ADT7410_T_ALARM_LOW, /* low */ - ADT7410_T_CRIT, /* critical */ -}; - -/* Each client has this additional data */ -struct adt7410_data { - struct device *hwmon_dev; - struct mutex update_lock; - u8 config; - u8 oldconfig; - bool valid; /* true if registers valid */ - unsigned long last_updated; /* In jiffies */ - s16 temp[4]; /* Register values, - 0 = input - 1 = high - 2 = low - 3 = critical */ - u8 hyst; /* hysteresis offset */ -}; - -/* - * adt7410 register access by I2C - */ -static int adt7410_temp_ready(struct i2c_client *client) -{ - int i, status; - - for (i = 0; i < 6; i++) { - status = i2c_smbus_read_byte_data(client, ADT7410_STATUS); - if (status < 0) - return status; - if (!(status & ADT7410_STAT_NOT_RDY)) - return 0; - msleep(60); - } - return -ETIMEDOUT; -} - -static int adt7410_update_temp(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct adt7410_data *data = i2c_get_clientdata(client); - int ret = 0; - - mutex_lock(&data->update_lock); - - if (time_after(jiffies, data->last_updated + HZ + HZ / 2) - || !data->valid) { - int temp; - - dev_dbg(&client->dev, "Starting update\n"); - - ret = adt7410_temp_ready(client); /* check for new value */ - if (ret) - goto abort; - - temp = i2c_smbus_read_word_swapped(client, ADT7410_REG_TEMP[0]); - if (temp < 0) { - ret = temp; - dev_dbg(dev, "Failed to read value: reg %d, error %d\n", - ADT7410_REG_TEMP[0], ret); - goto abort; - } - data->temp[0] = temp; - - data->last_updated = jiffies; - data->valid = true; - } - -abort: - mutex_unlock(&data->update_lock); - return ret; -} - -static int adt7410_fill_cache(struct i2c_client *client) -{ - struct adt7410_data *data = i2c_get_clientdata(client); - int ret; - int i; - - for (i = 1; i < ARRAY_SIZE(ADT7410_REG_TEMP); i++) { - ret = i2c_smbus_read_word_swapped(client, ADT7410_REG_TEMP[i]); - if (ret < 0) { - dev_dbg(&client->dev, - "Failed to read value: reg %d, error %d\n", - ADT7410_REG_TEMP[i], ret); - return ret; - } - data->temp[i] = ret; - } - - ret = i2c_smbus_read_byte_data(client, ADT7410_T_HYST); - if (ret < 0) { - dev_dbg(&client->dev, - "Failed to read value: hyst reg, error %d\n", - ret); - return ret; - } - data->hyst = ret; - - return 0; -} - -static s16 ADT7410_TEMP_TO_REG(long temp) -{ - return DIV_ROUND_CLOSEST(clamp_val(temp, ADT7410_TEMP_MIN, - ADT7410_TEMP_MAX) * 128, 1000); -} - -static int ADT7410_REG_TO_TEMP(struct adt7410_data *data, s16 reg) -{ - /* in 13 bit mode, bits 0-2 are status flags - mask them out */ - if (!(data->config & ADT7410_RESOLUTION)) - reg &= ADT7410_T13_VALUE_MASK; - /* - * temperature is stored in twos complement format, in steps of - * 1/128°C - */ - return DIV_ROUND_CLOSEST(reg * 1000, 128); -} - -/*-----------------------------------------------------------------------*/ -/* sysfs attributes for hwmon */ +#include "adt7x10.h" -static ssize_t adt7410_show_temp(struct device *dev, - struct device_attribute *da, char *buf) +static int adt7410_i2c_read_word(struct device *dev, u8 reg) { - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct i2c_client *client = to_i2c_client(dev); - struct adt7410_data *data = i2c_get_clientdata(client); - - if (attr->index == 0) { - int ret; - - ret = adt7410_update_temp(dev); - if (ret) - return ret; - } - - return sprintf(buf, "%d\n", ADT7410_REG_TO_TEMP(data, - data->temp[attr->index])); + return i2c_smbus_read_word_swapped(to_i2c_client(dev), reg); } -static ssize_t adt7410_set_temp(struct device *dev, - struct device_attribute *da, - const char *buf, size_t count) +static int adt7410_i2c_write_word(struct device *dev, u8 reg, u16 data) { - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct i2c_client *client = to_i2c_client(dev); - struct adt7410_data *data = i2c_get_clientdata(client); - int nr = attr->index; - long temp; - int ret; - - ret = kstrtol(buf, 10, &temp); - if (ret) - return ret; - - mutex_lock(&data->update_lock); - data->temp[nr] = ADT7410_TEMP_TO_REG(temp); - ret = i2c_smbus_write_word_swapped(client, ADT7410_REG_TEMP[nr], - data->temp[nr]); - if (ret) - count = ret; - mutex_unlock(&data->update_lock); - return count; + return i2c_smbus_write_word_swapped(to_i2c_client(dev), reg, data); } -static ssize_t adt7410_show_t_hyst(struct device *dev, - struct device_attribute *da, - char *buf) +static int adt7410_i2c_read_byte(struct device *dev, u8 reg) { - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct i2c_client *client = to_i2c_client(dev); - struct adt7410_data *data = i2c_get_clientdata(client); - int nr = attr->index; - int hyst; - - hyst = (data->hyst & ADT7410_T_HYST_MASK) * 1000; - - /* - * hysteresis is stored as a 4 bit offset in the device, convert it - * to an absolute value - */ - if (nr == 2) /* min has positive offset, others have negative */ - hyst = -hyst; - return sprintf(buf, "%d\n", - ADT7410_REG_TO_TEMP(data, data->temp[nr]) - hyst); + return i2c_smbus_read_byte_data(to_i2c_client(dev), reg); } -static ssize_t adt7410_set_t_hyst(struct device *dev, - struct device_attribute *da, - const char *buf, size_t count) +static int adt7410_i2c_write_byte(struct device *dev, u8 reg, u8 data) { - struct i2c_client *client = to_i2c_client(dev); - struct adt7410_data *data = i2c_get_clientdata(client); - int limit, ret; - long hyst; - - ret = kstrtol(buf, 10, &hyst); - if (ret) - return ret; - /* convert absolute hysteresis value to a 4 bit delta value */ - limit = ADT7410_REG_TO_TEMP(data, data->temp[1]); - hyst = clamp_val(hyst, ADT7410_TEMP_MIN, ADT7410_TEMP_MAX); - data->hyst = clamp_val(DIV_ROUND_CLOSEST(limit - hyst, 1000), 0, - ADT7410_T_HYST_MASK); - ret = i2c_smbus_write_byte_data(client, ADT7410_T_HYST, data->hyst); - if (ret) - return ret; - - return count; + return i2c_smbus_write_byte_data(to_i2c_client(dev), reg, data); } -static ssize_t adt7410_show_alarm(struct device *dev, - struct device_attribute *da, - char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - int ret; - - ret = i2c_smbus_read_byte_data(client, ADT7410_STATUS); - if (ret < 0) - return ret; - - return sprintf(buf, "%d\n", !!(ret & attr->index)); -} - -static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, adt7410_show_temp, NULL, 0); -static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, - adt7410_show_temp, adt7410_set_temp, 1); -static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, - adt7410_show_temp, adt7410_set_temp, 2); -static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, - adt7410_show_temp, adt7410_set_temp, 3); -static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, - adt7410_show_t_hyst, adt7410_set_t_hyst, 1); -static SENSOR_DEVICE_ATTR(temp1_min_hyst, S_IRUGO, - adt7410_show_t_hyst, NULL, 2); -static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, - adt7410_show_t_hyst, NULL, 3); -static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, adt7410_show_alarm, - NULL, ADT7410_STAT_T_LOW); -static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, adt7410_show_alarm, - NULL, ADT7410_STAT_T_HIGH); -static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, adt7410_show_alarm, - NULL, ADT7410_STAT_T_CRIT); - -static struct attribute *adt7410_attributes[] = { - &sensor_dev_attr_temp1_input.dev_attr.attr, - &sensor_dev_attr_temp1_max.dev_attr.attr, - &sensor_dev_attr_temp1_min.dev_attr.attr, - &sensor_dev_attr_temp1_crit.dev_attr.attr, - &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, - &sensor_dev_attr_temp1_min_hyst.dev_attr.attr, - &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, - &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, - &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, - &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, - NULL +static const struct adt7x10_ops adt7410_i2c_ops = { + .read_word = adt7410_i2c_read_word, + .write_word = adt7410_i2c_write_word, + .read_byte = adt7410_i2c_read_byte, + .write_byte = adt7410_i2c_write_byte, }; -static const struct attribute_group adt7410_group = { - .attrs = adt7410_attributes, -}; - -/*-----------------------------------------------------------------------*/ - -/* device probe and removal */ - -static int adt7410_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int adt7410_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) { - struct adt7410_data *data; - int ret; - if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA)) return -ENODEV; - data = devm_kzalloc(&client->dev, sizeof(struct adt7410_data), - GFP_KERNEL); - if (!data) - return -ENOMEM; - - i2c_set_clientdata(client, data); - mutex_init(&data->update_lock); - - /* configure as specified */ - ret = i2c_smbus_read_byte_data(client, ADT7410_CONFIG); - if (ret < 0) { - dev_dbg(&client->dev, "Can't read config? %d\n", ret); - return ret; - } - data->oldconfig = ret; - /* - * Set to 16 bit resolution, continous conversion and comparator mode. - */ - ret &= ~ADT7410_MODE_MASK; - data->config = ret | ADT7410_FULL | ADT7410_RESOLUTION | - ADT7410_EVENT_MODE; - if (data->config != data->oldconfig) { - ret = i2c_smbus_write_byte_data(client, ADT7410_CONFIG, - data->config); - if (ret) - return ret; - } - dev_dbg(&client->dev, "Config %02x\n", data->config); - - ret = adt7410_fill_cache(client); - if (ret) - goto exit_restore; - - /* Register sysfs hooks */ - ret = sysfs_create_group(&client->dev.kobj, &adt7410_group); - if (ret) - goto exit_restore; - - data->hwmon_dev = hwmon_device_register(&client->dev); - if (IS_ERR(data->hwmon_dev)) { - ret = PTR_ERR(data->hwmon_dev); - goto exit_remove; - } - - dev_info(&client->dev, "sensor '%s'\n", client->name); - - return 0; - -exit_remove: - sysfs_remove_group(&client->dev.kobj, &adt7410_group); -exit_restore: - i2c_smbus_write_byte_data(client, ADT7410_CONFIG, data->oldconfig); - return ret; + return adt7x10_probe(&client->dev, NULL, &adt7410_i2c_ops); } -static int adt7410_remove(struct i2c_client *client) +static int adt7410_i2c_remove(struct i2c_client *client) { - struct adt7410_data *data = i2c_get_clientdata(client); - - hwmon_device_unregister(data->hwmon_dev); - sysfs_remove_group(&client->dev.kobj, &adt7410_group); - if (data->oldconfig != data->config) - i2c_smbus_write_byte_data(client, ADT7410_CONFIG, - data->oldconfig); - return 0; + return adt7x10_remove(&client->dev); } static const struct i2c_device_id adt7410_ids[] = { - { "adt7410", adt7410, }, - { "adt7420", adt7410, }, - { /* LIST END */ } + { "adt7410", 0 }, + { "adt7420", 0 }, + {} }; MODULE_DEVICE_TABLE(i2c, adt7410_ids); -#ifdef CONFIG_PM_SLEEP -static int adt7410_suspend(struct device *dev) -{ - int ret; - struct i2c_client *client = to_i2c_client(dev); - struct adt7410_data *data = i2c_get_clientdata(client); - - ret = i2c_smbus_write_byte_data(client, ADT7410_CONFIG, - data->config | ADT7410_PD); - return ret; -} - -static int adt7410_resume(struct device *dev) -{ - int ret; - struct i2c_client *client = to_i2c_client(dev); - struct adt7410_data *data = i2c_get_clientdata(client); - - ret = i2c_smbus_write_byte_data(client, ADT7410_CONFIG, data->config); - return ret; -} - -static SIMPLE_DEV_PM_OPS(adt7410_dev_pm_ops, adt7410_suspend, adt7410_resume); - -#define ADT7410_DEV_PM_OPS (&adt7410_dev_pm_ops) -#else -#define ADT7410_DEV_PM_OPS NULL -#endif /* CONFIG_PM */ - static struct i2c_driver adt7410_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "adt7410", - .pm = ADT7410_DEV_PM_OPS, + .pm = ADT7X10_DEV_PM_OPS, }, - .probe = adt7410_probe, - .remove = adt7410_remove, + .probe = adt7410_i2c_probe, + .remove = adt7410_i2c_remove, .id_table = adt7410_ids, .address_list = I2C_ADDRS(0x48, 0x49, 0x4a, 0x4b), }; - module_i2c_driver(adt7410_driver); -MODULE_AUTHOR("Hartmut Knaack"); -MODULE_DESCRIPTION("ADT7410/ADT7420 driver"); +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("ADT7410/AD7420 driver"); MODULE_LICENSE("GPL"); diff --git a/drivers/hwmon/adt7x10.c b/drivers/hwmon/adt7x10.c new file mode 100644 index 000000000000..84b3dfc1c1cd --- /dev/null +++ b/drivers/hwmon/adt7x10.c @@ -0,0 +1,476 @@ +/* + * adt7x10.c - Part of lm_sensors, Linux kernel modules for hardware + * monitoring + * This driver handles the ADT7410 and compatible digital temperature sensors. + * Hartmut Knaack <knaack.h@gmx.de> 2012-07-22 + * based on lm75.c by Frodo Looijaard <frodol@dds.nl> + * and adt7410.c from iio-staging by Sonic Zhang <sonic.zhang@analog.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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/jiffies.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/err.h> +#include <linux/mutex.h> +#include <linux/delay.h> + +#include "adt7x10.h" + +/* + * ADT7X10 status + */ +#define ADT7X10_STAT_T_LOW (1 << 4) +#define ADT7X10_STAT_T_HIGH (1 << 5) +#define ADT7X10_STAT_T_CRIT (1 << 6) +#define ADT7X10_STAT_NOT_RDY (1 << 7) + +/* + * ADT7X10 config + */ +#define ADT7X10_FAULT_QUEUE_MASK (1 << 0 | 1 << 1) +#define ADT7X10_CT_POLARITY (1 << 2) +#define ADT7X10_INT_POLARITY (1 << 3) +#define ADT7X10_EVENT_MODE (1 << 4) +#define ADT7X10_MODE_MASK (1 << 5 | 1 << 6) +#define ADT7X10_FULL (0 << 5 | 0 << 6) +#define ADT7X10_PD (1 << 5 | 1 << 6) +#define ADT7X10_RESOLUTION (1 << 7) + +/* + * ADT7X10 masks + */ +#define ADT7X10_T13_VALUE_MASK 0xFFF8 +#define ADT7X10_T_HYST_MASK 0xF + +/* straight from the datasheet */ +#define ADT7X10_TEMP_MIN (-55000) +#define ADT7X10_TEMP_MAX 150000 + +/* Each client has this additional data */ +struct adt7x10_data { + const struct adt7x10_ops *ops; + const char *name; + struct device *hwmon_dev; + struct mutex update_lock; + u8 config; + u8 oldconfig; + bool valid; /* true if registers valid */ + unsigned long last_updated; /* In jiffies */ + s16 temp[4]; /* Register values, + 0 = input + 1 = high + 2 = low + 3 = critical */ + u8 hyst; /* hysteresis offset */ +}; + +static int adt7x10_read_byte(struct device *dev, u8 reg) +{ + struct adt7x10_data *d = dev_get_drvdata(dev); + return d->ops->read_byte(dev, reg); +} + +static int adt7x10_write_byte(struct device *dev, u8 reg, u8 data) +{ + struct adt7x10_data *d = dev_get_drvdata(dev); + return d->ops->write_byte(dev, reg, data); +} + +static int adt7x10_read_word(struct device *dev, u8 reg) +{ + struct adt7x10_data *d = dev_get_drvdata(dev); + return d->ops->read_word(dev, reg); +} + +static int adt7x10_write_word(struct device *dev, u8 reg, u16 data) +{ + struct adt7x10_data *d = dev_get_drvdata(dev); + return d->ops->write_word(dev, reg, data); +} + +static const u8 ADT7X10_REG_TEMP[4] = { + ADT7X10_TEMPERATURE, /* input */ + ADT7X10_T_ALARM_HIGH, /* high */ + ADT7X10_T_ALARM_LOW, /* low */ + ADT7X10_T_CRIT, /* critical */ +}; + +static int adt7x10_temp_ready(struct device *dev) +{ + int i, status; + + for (i = 0; i < 6; i++) { + status = adt7x10_read_byte(dev, ADT7X10_STATUS); + if (status < 0) + return status; + if (!(status & ADT7X10_STAT_NOT_RDY)) + return 0; + msleep(60); + } + return -ETIMEDOUT; +} + +static int adt7x10_update_temp(struct device *dev) +{ + struct adt7x10_data *data = dev_get_drvdata(dev); + int ret = 0; + + mutex_lock(&data->update_lock); + + if (time_after(jiffies, data->last_updated + HZ + HZ / 2) + || !data->valid) { + int temp; + + dev_dbg(dev, "Starting update\n"); + + ret = adt7x10_temp_ready(dev); /* check for new value */ + if (ret) + goto abort; + + temp = adt7x10_read_word(dev, ADT7X10_REG_TEMP[0]); + if (temp < 0) { + ret = temp; + dev_dbg(dev, "Failed to read value: reg %d, error %d\n", + ADT7X10_REG_TEMP[0], ret); + goto abort; + } + data->temp[0] = temp; + data->last_updated = jiffies; + data->valid = true; + } + +abort: + mutex_unlock(&data->update_lock); + return ret; +} + +static int adt7x10_fill_cache(struct device *dev) +{ + struct adt7x10_data *data = dev_get_drvdata(dev); + int ret; + int i; + + for (i = 1; i < ARRAY_SIZE(data->temp); i++) { + ret = adt7x10_read_word(dev, ADT7X10_REG_TEMP[i]); + if (ret < 0) { + dev_dbg(dev, "Failed to read value: reg %d, error %d\n", + ADT7X10_REG_TEMP[i], ret); + return ret; + } + data->temp[i] = ret; + } + + ret = adt7x10_read_byte(dev, ADT7X10_T_HYST); + if (ret < 0) { + dev_dbg(dev, "Failed to read value: reg %d, error %d\n", + ADT7X10_T_HYST, ret); + return ret; + } + data->hyst = ret; + + return 0; +} + +static s16 ADT7X10_TEMP_TO_REG(long temp) +{ + return DIV_ROUND_CLOSEST(clamp_val(temp, ADT7X10_TEMP_MIN, + ADT7X10_TEMP_MAX) * 128, 1000); +} + +static int ADT7X10_REG_TO_TEMP(struct adt7x10_data *data, s16 reg) +{ + /* in 13 bit mode, bits 0-2 are status flags - mask them out */ + if (!(data->config & ADT7X10_RESOLUTION)) + reg &= ADT7X10_T13_VALUE_MASK; + /* + * temperature is stored in twos complement format, in steps of + * 1/128°C + */ + return DIV_ROUND_CLOSEST(reg * 1000, 128); +} + +/*-----------------------------------------------------------------------*/ + +/* sysfs attributes for hwmon */ + +static ssize_t adt7x10_show_temp(struct device *dev, + struct device_attribute *da, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct adt7x10_data *data = dev_get_drvdata(dev); + + + if (attr->index == 0) { + int ret; + + ret = adt7x10_update_temp(dev); + if (ret) + return ret; + } + + return sprintf(buf, "%d\n", ADT7X10_REG_TO_TEMP(data, + data->temp[attr->index])); +} + +static ssize_t adt7x10_set_temp(struct device *dev, + struct device_attribute *da, + const char *buf, size_t count) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct adt7x10_data *data = dev_get_drvdata(dev); + int nr = attr->index; + long temp; + int ret; + + ret = kstrtol(buf, 10, &temp); + if (ret) + return ret; + + mutex_lock(&data->update_lock); + data->temp[nr] = ADT7X10_TEMP_TO_REG(temp); + ret = adt7x10_write_word(dev, ADT7X10_REG_TEMP[nr], data->temp[nr]); + if (ret) + count = ret; + mutex_unlock(&data->update_lock); + return count; +} + +static ssize_t adt7x10_show_t_hyst(struct device *dev, + struct device_attribute *da, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct adt7x10_data *data = dev_get_drvdata(dev); + int nr = attr->index; + int hyst; + + hyst = (data->hyst & ADT7X10_T_HYST_MASK) * 1000; + + /* + * hysteresis is stored as a 4 bit offset in the device, convert it + * to an absolute value + */ + if (nr == 2) /* min has positive offset, others have negative */ + hyst = -hyst; + return sprintf(buf, "%d\n", + ADT7X10_REG_TO_TEMP(data, data->temp[nr]) - hyst); +} + +static ssize_t adt7x10_set_t_hyst(struct device *dev, + struct device_attribute *da, + const char *buf, size_t count) +{ + struct adt7x10_data *data = dev_get_drvdata(dev); + int limit, ret; + long hyst; + + ret = kstrtol(buf, 10, &hyst); + if (ret) + return ret; + /* convert absolute hysteresis value to a 4 bit delta value */ + limit = ADT7X10_REG_TO_TEMP(data, data->temp[1]); + hyst = clamp_val(hyst, ADT7X10_TEMP_MIN, ADT7X10_TEMP_MAX); + data->hyst = clamp_val(DIV_ROUND_CLOSEST(limit - hyst, 1000), + 0, ADT7X10_T_HYST_MASK); + ret = adt7x10_write_byte(dev, ADT7X10_T_HYST, data->hyst); + if (ret) + return ret; + + return count; +} + +static ssize_t adt7x10_show_alarm(struct device *dev, + struct device_attribute *da, + char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int ret; + + ret = adt7x10_read_byte(dev, ADT7X10_STATUS); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", !!(ret & attr->index)); +} + +static ssize_t adt7x10_show_name(struct device *dev, + struct device_attribute *da, + char *buf) +{ + struct adt7x10_data *data = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", data->name); +} + +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, adt7x10_show_temp, NULL, 0); +static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, + adt7x10_show_temp, adt7x10_set_temp, 1); +static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, + adt7x10_show_temp, adt7x10_set_temp, 2); +static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, + adt7x10_show_temp, adt7x10_set_temp, 3); +static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, + adt7x10_show_t_hyst, adt7x10_set_t_hyst, 1); +static SENSOR_DEVICE_ATTR(temp1_min_hyst, S_IRUGO, + adt7x10_show_t_hyst, NULL, 2); +static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, + adt7x10_show_t_hyst, NULL, 3); +static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, adt7x10_show_alarm, + NULL, ADT7X10_STAT_T_LOW); +static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, adt7x10_show_alarm, + NULL, ADT7X10_STAT_T_HIGH); +static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, adt7x10_show_alarm, + NULL, ADT7X10_STAT_T_CRIT); +static DEVICE_ATTR(name, S_IRUGO, adt7x10_show_name, NULL); + +static struct attribute *adt7x10_attributes[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp1_min.dev_attr.attr, + &sensor_dev_attr_temp1_crit.dev_attr.attr, + &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp1_min_hyst.dev_attr.attr, + &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, + &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, + NULL +}; + +static const struct attribute_group adt7x10_group = { + .attrs = adt7x10_attributes, +}; + +int adt7x10_probe(struct device *dev, const char *name, + const struct adt7x10_ops *ops) +{ + struct adt7x10_data *data; + int ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->ops = ops; + data->name = name; + + dev_set_drvdata(dev, data); + mutex_init(&data->update_lock); + + /* configure as specified */ + ret = adt7x10_read_byte(dev, ADT7X10_CONFIG); + if (ret < 0) { + dev_dbg(dev, "Can't read config? %d\n", ret); + return ret; + } + data->oldconfig = ret; + + /* + * Set to 16 bit resolution, continous conversion and comparator mode. + */ + data->config = data->oldconfig; + data->config &= ~ADT7X10_MODE_MASK; + data->config |= ADT7X10_FULL | ADT7X10_RESOLUTION | ADT7X10_EVENT_MODE; + if (data->config != data->oldconfig) { + ret = adt7x10_write_byte(dev, ADT7X10_CONFIG, data->config); + if (ret) + return ret; + } + dev_dbg(dev, "Config %02x\n", data->config); + + ret = adt7x10_fill_cache(dev); + if (ret) + goto exit_restore; + + /* Register sysfs hooks */ + ret = sysfs_create_group(&dev->kobj, &adt7x10_group); + if (ret) + goto exit_restore; + + /* + * The I2C device will already have it's own 'name' attribute, but for + * the SPI device we need to register it. name will only be non NULL if + * the device doesn't register the 'name' attribute on its own. + */ + if (name) { + ret = device_create_file(dev, &dev_attr_name); + if (ret) + goto exit_remove; + } + + data->hwmon_dev = hwmon_device_register(dev); + if (IS_ERR(data->hwmon_dev)) { + ret = PTR_ERR(data->hwmon_dev); + goto exit_remove_name; + } + + return 0; + +exit_remove_name: + if (name) + device_remove_file(dev, &dev_attr_name); +exit_remove: + sysfs_remove_group(&dev->kobj, &adt7x10_group); +exit_restore: + adt7x10_write_byte(dev, ADT7X10_CONFIG, data->oldconfig); + return ret; +} +EXPORT_SYMBOL_GPL(adt7x10_probe); + +int adt7x10_remove(struct device *dev) +{ + struct adt7x10_data *data = dev_get_drvdata(dev); + + hwmon_device_unregister(data->hwmon_dev); + if (data->name) + device_remove_file(dev, &dev_attr_name); + sysfs_remove_group(&dev->kobj, &adt7x10_group); + if (data->oldconfig != data->config) + adt7x10_write_byte(dev, ADT7X10_CONFIG, data->oldconfig); + return 0; +} +EXPORT_SYMBOL_GPL(adt7x10_remove); + +#ifdef CONFIG_PM_SLEEP + +static int adt7x10_suspend(struct device *dev) +{ + struct adt7x10_data *data = dev_get_drvdata(dev); + + return adt7x10_write_byte(dev, ADT7X10_CONFIG, + data->config | ADT7X10_PD); +} + +static int adt7x10_resume(struct device *dev) +{ + struct adt7x10_data *data = dev_get_drvdata(dev); + + return adt7x10_write_byte(dev, ADT7X10_CONFIG, data->config); +} + +SIMPLE_DEV_PM_OPS(adt7x10_dev_pm_ops, adt7x10_suspend, adt7x10_resume); +EXPORT_SYMBOL_GPL(adt7x10_dev_pm_ops); + +#endif /* CONFIG_PM_SLEEP */ + +MODULE_AUTHOR("Hartmut Knaack"); +MODULE_DESCRIPTION("ADT7410/ADT7420, ADT7310/ADT7320 common code"); +MODULE_LICENSE("GPL"); diff --git a/drivers/hwmon/adt7x10.h b/drivers/hwmon/adt7x10.h new file mode 100644 index 000000000000..803d9b91c5db --- /dev/null +++ b/drivers/hwmon/adt7x10.h @@ -0,0 +1,37 @@ +#ifndef __HWMON_ADT7X10_H__ +#define __HWMON_ADT7X10_H__ + +#include <linux/types.h> +#include <linux/pm.h> + +/* ADT7410 registers definition */ +#define ADT7X10_TEMPERATURE 0 +#define ADT7X10_STATUS 2 +#define ADT7X10_CONFIG 3 +#define ADT7X10_T_ALARM_HIGH 4 +#define ADT7X10_T_ALARM_LOW 6 +#define ADT7X10_T_CRIT 8 +#define ADT7X10_T_HYST 0xA +#define ADT7X10_ID 0xB + +struct device; + +struct adt7x10_ops { + int (*read_byte)(struct device *, u8 reg); + int (*write_byte)(struct device *, u8 reg, u8 data); + int (*read_word)(struct device *, u8 reg); + int (*write_word)(struct device *, u8 reg, u16 data); +}; + +int adt7x10_probe(struct device *dev, const char *name, + const struct adt7x10_ops *ops); +int adt7x10_remove(struct device *dev); + +#ifdef CONFIG_PM_SLEEP +extern const struct dev_pm_ops adt7x10_dev_pm_ops; +#define ADT7X10_DEV_PM_OPS (&adt7x10_dev_pm_ops) +#else +#define ADT7X10_DEV_PM_OPS NULL +#endif + +#endif |