diff options
| -rw-r--r-- | Documentation/hwmon/adm1275 | 60 | ||||
| -rw-r--r-- | drivers/hwmon/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwmon/adm1275.c | 121 |
4 files changed, 192 insertions, 0 deletions
diff --git a/Documentation/hwmon/adm1275 b/Documentation/hwmon/adm1275 new file mode 100644 index 00000000000..6a3a6476cf2 --- /dev/null +++ b/Documentation/hwmon/adm1275 @@ -0,0 +1,60 @@ +Kernel driver adm1275 +===================== + +Supported chips: + * Analog Devices ADM1275 + Prefix: 'adm1275' + Addresses scanned: - + Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1275.pdf + +Author: Guenter Roeck <guenter.roeck@ericsson.com> + + +Description +----------- + +This driver supports hardware montoring for Analog Devices ADM1275 Hot-Swap +Controller and Digital Power Monitor. + +The ADM1275 is a hot-swap controller that allows a circuit board to be removed +from or inserted into a live backplane. It also features current and voltage +readback via an integrated 12-bit analog-to-digital converter (ADC), accessed +using a PMBus. interface. + +The driver is a client driver to the core PMBus driver. Please see +Documentation/hwmon/pmbus for details on PMBus client drivers. + + +Usage Notes +----------- + +This driver does not auto-detect devices. You will have to instantiate the +devices explicitly. Please see Documentation/i2c/instantiating-devices for +details. + + +Platform data support +--------------------- + +The driver supports standard PMBus driver platform data. Please see +Documentation/hwmon/pmbus for details. + + +Sysfs entries +------------- + +The following attributes are supported. Limits are read-write; all other +attributes are read-only. + +in1_label "vin1" or "vout1" depending on chip variant and + configuration. +in1_input Measured voltage. From READ_VOUT register. +in1_min Minumum Voltage. From VOUT_UV_WARN_LIMIT register. +in1_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. +in1_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. +in1_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. + +curr1_label "iout1" +curr1_input Measured current. From READ_IOUT register. +curr1_max Maximum current. From IOUT_OC_WARN_LIMIT register. +curr1_max_alarm Current high alarm. From IOUT_OC_WARN_LIMIT register. diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index d00fd39f6ee..4abd3735a76 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -827,6 +827,16 @@ config SENSORS_PMBUS This driver can also be built as a module. If so, the module will be called pmbus. +config SENSORS_ADM1275 + tristate "Analog Devices ADM1275" + default n + help + If you say yes here you get hardware monitoring support for Analog + Devices ADM1275 Hot-Swap Controller and Digital Power Monitor. + + This driver can also be built as a module. If so, the module will + be called adm1275. + config SENSORS_MAX16064 tristate "Maxim MAX16064" default n diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index c4a269b0692..21c9b17abad 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -120,6 +120,7 @@ obj-$(CONFIG_SENSORS_WM8350) += wm8350-hwmon.o # PMBus drivers obj-$(CONFIG_PMBUS) += pmbus_core.o obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o +obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o obj-$(CONFIG_SENSORS_MAX16064) += max16064.o obj-$(CONFIG_SENSORS_MAX34440) += max34440.o obj-$(CONFIG_SENSORS_MAX8688) += max8688.o diff --git a/drivers/hwmon/adm1275.c b/drivers/hwmon/adm1275.c new file mode 100644 index 00000000000..c2ee2048ab9 --- /dev/null +++ b/drivers/hwmon/adm1275.c @@ -0,0 +1,121 @@ +/* + * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller + * and Digital Power Monitor + * + * Copyright (c) 2011 Ericsson AB. + * + * 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/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include "pmbus.h" + +#define ADM1275_PMON_CONFIG 0xd4 + +#define ADM1275_VIN_VOUT_SELECT (1 << 6) +#define ADM1275_VRANGE (1 << 5) + +static int adm1275_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int config; + struct pmbus_driver_info *info; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_BYTE_DATA)) + return -ENODEV; + + info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); + if (config < 0) + return config; + + info->pages = 1; + info->direct[PSC_VOLTAGE_IN] = true; + info->direct[PSC_VOLTAGE_OUT] = true; + info->direct[PSC_CURRENT_OUT] = true; + info->m[PSC_CURRENT_OUT] = 800; + info->b[PSC_CURRENT_OUT] = 20475; + info->R[PSC_CURRENT_OUT] = -1; + info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT; + + if (config & ADM1275_VRANGE) { + info->m[PSC_VOLTAGE_IN] = 19045; + info->b[PSC_VOLTAGE_IN] = 0; + info->R[PSC_VOLTAGE_IN] = -2; + info->m[PSC_VOLTAGE_OUT] = 19045; + info->b[PSC_VOLTAGE_OUT] = 0; + info->R[PSC_VOLTAGE_OUT] = -2; + } else { + info->m[PSC_VOLTAGE_IN] = 6666; + info->b[PSC_VOLTAGE_IN] = 0; + info->R[PSC_VOLTAGE_IN] = -1; + info->m[PSC_VOLTAGE_OUT] = 6666; + info->b[PSC_VOLTAGE_OUT] = 0; + info->R[PSC_VOLTAGE_OUT] = -1; + } + + if (config & ADM1275_VIN_VOUT_SELECT) + info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; + else + info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; + + return pmbus_do_probe(client, id, info); +} + +static int adm1275_remove(struct i2c_client *client) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + int ret; + + ret = pmbus_do_remove(client); + kfree(info); + return ret; +} + +static const struct i2c_device_id adm1275_id[] = { + {"adm1275", 0}, + { } +}; +MODULE_DEVICE_TABLE(i2c, adm1275_id); + +static struct i2c_driver adm1275_driver = { + .driver = { + .name = "adm1275", + }, + .probe = adm1275_probe, + .remove = adm1275_remove, + .id_table = adm1275_id, +}; + +static int __init adm1275_init(void) +{ + return i2c_add_driver(&adm1275_driver); +} + +static void __exit adm1275_exit(void) +{ + i2c_del_driver(&adm1275_driver); +} + +MODULE_AUTHOR("Guenter Roeck"); +MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275"); +MODULE_LICENSE("GPL"); +module_init(adm1275_init); +module_exit(adm1275_exit); |