hwmon: New driver for the SMSC EMC6W201
This is a new driver for the SMSC EMC6W201 hardware monitoring device. The device is functionally close to the EMC6D100 series, but is register-incompatible. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Harry G McGavran Jr <w5pny@arrl.net> Tested-by: Jeff Rickman <jrickman@myamigos.us> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
This commit is contained in:
Jean Delvare
Jean Delvare
parent
ec693fe528
commit
b0b349a85d
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@ -0,0 +1,42 @@
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Kernel driver emc6w201
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======================
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Supported chips:
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* SMSC EMC6W201
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Prefix: 'emc6w201'
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Addresses scanned: I2C 0x2c, 0x2d, 0x2e
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Datasheet: Not public
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Author: Jean Delvare <khali@linux-fr.org>
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Description
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-----------
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From the datasheet:
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"The EMC6W201 is an environmental monitoring device with automatic fan
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control capability and enhanced system acoustics for noise suppression.
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This ACPI compliant device provides hardware monitoring for up to six
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voltages (including its own VCC) and five external thermal sensors,
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measures the speed of up to five fans, and controls the speed of
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multiple DC fans using three Pulse Width Modulator (PWM) outputs. Note
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that it is possible to control more than three fans by connecting two
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fans to one PWM output. The EMC6W201 will be available in a 36-pin
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QFN package."
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The device is functionally close to the EMC6D100 series, but is
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register-incompatible.
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The driver currently only supports the monitoring of the voltages,
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temperatures and fan speeds. Limits can be changed. Alarms are not
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supported, and neither is fan speed control.
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Known Systems With EMC6W201
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---------------------------
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The EMC6W201 is a rare device, only found on a few systems, made in
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2005 and 2006. Known systems with this device:
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* Dell Precision 670 workstation
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* Gigabyte 2CEWH mainboard
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@ -988,6 +988,16 @@ config SENSORS_EMC2103
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This driver can also be built as a module. If so, the module
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will be called emc2103.
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config SENSORS_EMC6W201
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tristate "SMSC EMC6W201"
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depends on I2C
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help
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If you say yes here you get support for the SMSC EMC6W201
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hardware monitoring chip.
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This driver can also be built as a module. If so, the module
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will be called emc6w201.
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config SENSORS_SMSC47M1
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tristate "SMSC LPC47M10x and compatibles"
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help
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@ -46,6 +46,7 @@ obj-$(CONFIG_SENSORS_DS620) += ds620.o
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obj-$(CONFIG_SENSORS_DS1621) += ds1621.o
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obj-$(CONFIG_SENSORS_EMC1403) += emc1403.o
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obj-$(CONFIG_SENSORS_EMC2103) += emc2103.o
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obj-$(CONFIG_SENSORS_EMC6W201) += emc6w201.o
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obj-$(CONFIG_SENSORS_F71805F) += f71805f.o
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obj-$(CONFIG_SENSORS_F71882FG) += f71882fg.o
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obj-$(CONFIG_SENSORS_F75375S) += f75375s.o
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@ -0,0 +1,539 @@
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/*
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* emc6w201.c - Hardware monitoring driver for the SMSC EMC6W201
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* Copyright (C) 2011 Jean Delvare <khali@linux-fr.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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/*
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* Addresses to scan
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*/
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
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/*
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* The EMC6W201 registers
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*/
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#define EMC6W201_REG_IN(nr) (0x20 + (nr))
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#define EMC6W201_REG_TEMP(nr) (0x26 + (nr))
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#define EMC6W201_REG_FAN(nr) (0x2C + (nr) * 2)
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#define EMC6W201_REG_COMPANY 0x3E
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#define EMC6W201_REG_VERSTEP 0x3F
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#define EMC6W201_REG_CONFIG 0x40
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#define EMC6W201_REG_IN_LOW(nr) (0x4A + (nr) * 2)
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#define EMC6W201_REG_IN_HIGH(nr) (0x4B + (nr) * 2)
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#define EMC6W201_REG_TEMP_LOW(nr) (0x56 + (nr) * 2)
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#define EMC6W201_REG_TEMP_HIGH(nr) (0x57 + (nr) * 2)
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#define EMC6W201_REG_FAN_MIN(nr) (0x62 + (nr) * 2)
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enum { input, min, max } subfeature;
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/*
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* Per-device data
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*/
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struct emc6w201_data {
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struct device *hwmon_dev;
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struct mutex update_lock;
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char valid; /* zero until following fields are valid */
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unsigned long last_updated; /* in jiffies */
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/* registers values */
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u8 in[3][6];
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s8 temp[3][6];
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u16 fan[2][5];
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};
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/*
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* Combine LSB and MSB registers in a single value
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* Locking: must be called with data->update_lock held
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*/
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static u16 emc6w201_read16(struct i2c_client *client, u8 reg)
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{
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int lsb, msb;
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lsb = i2c_smbus_read_byte_data(client, reg);
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msb = i2c_smbus_read_byte_data(client, reg + 1);
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if (lsb < 0 || msb < 0) {
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dev_err(&client->dev, "16-bit read failed at 0x%02x\n", reg);
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return 0xFFFF; /* Arbitrary value */
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}
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return (msb << 8) | lsb;
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}
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/*
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* Write 16-bit value to LSB and MSB registers
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* Locking: must be called with data->update_lock held
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*/
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static int emc6w201_write16(struct i2c_client *client, u8 reg, u16 val)
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{
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int err;
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err = i2c_smbus_write_byte_data(client, reg, val & 0xff);
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if (!err)
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err = i2c_smbus_write_byte_data(client, reg + 1, val >> 8);
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if (err < 0)
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dev_err(&client->dev, "16-bit write failed at 0x%02x\n", reg);
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return err;
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}
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static struct emc6w201_data *emc6w201_update_device(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct emc6w201_data *data = i2c_get_clientdata(client);
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int nr;
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mutex_lock(&data->update_lock);
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if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
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for (nr = 0; nr < 6; nr++) {
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data->in[input][nr] =
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i2c_smbus_read_byte_data(client,
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EMC6W201_REG_IN(nr));
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data->in[min][nr] =
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i2c_smbus_read_byte_data(client,
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EMC6W201_REG_IN_LOW(nr));
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data->in[max][nr] =
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i2c_smbus_read_byte_data(client,
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EMC6W201_REG_IN_HIGH(nr));
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}
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for (nr = 0; nr < 6; nr++) {
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data->temp[input][nr] =
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i2c_smbus_read_byte_data(client,
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EMC6W201_REG_TEMP(nr));
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data->temp[min][nr] =
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i2c_smbus_read_byte_data(client,
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EMC6W201_REG_TEMP_LOW(nr));
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data->temp[max][nr] =
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i2c_smbus_read_byte_data(client,
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EMC6W201_REG_TEMP_HIGH(nr));
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}
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for (nr = 0; nr < 5; nr++) {
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data->fan[input][nr] =
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emc6w201_read16(client,
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EMC6W201_REG_FAN(nr));
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data->fan[min][nr] =
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emc6w201_read16(client,
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EMC6W201_REG_FAN_MIN(nr));
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}
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data->last_updated = jiffies;
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data->valid = 1;
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}
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mutex_unlock(&data->update_lock);
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return data;
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}
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/*
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* Sysfs callback functions
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*/
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static const u16 nominal_mv[6] = { 2500, 1500, 3300, 5000, 1500, 1500 };
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static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct emc6w201_data *data = emc6w201_update_device(dev);
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int sf = to_sensor_dev_attr_2(devattr)->index;
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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return sprintf(buf, "%u\n",
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(unsigned)data->in[sf][nr] * nominal_mv[nr] / 0xC0);
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}
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static ssize_t set_in(struct device *dev, struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct emc6w201_data *data = i2c_get_clientdata(client);
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int sf = to_sensor_dev_attr_2(devattr)->index;
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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int err;
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long val;
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u8 reg;
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err = strict_strtol(buf, 10, &val);
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if (err < 0)
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return err;
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val = DIV_ROUND_CLOSEST(val * 0xC0, nominal_mv[nr]);
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reg = (sf == min) ? EMC6W201_REG_IN_LOW(nr)
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: EMC6W201_REG_IN_HIGH(nr);
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mutex_lock(&data->update_lock);
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data->in[sf][nr] = SENSORS_LIMIT(val, 0, 255);
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err = i2c_smbus_write_byte_data(client, reg, data->in[sf][nr]);
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mutex_unlock(&data->update_lock);
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return err < 0 ? err : count;
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}
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static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct emc6w201_data *data = emc6w201_update_device(dev);
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int sf = to_sensor_dev_attr_2(devattr)->index;
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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return sprintf(buf, "%d\n", (int)data->temp[sf][nr] * 1000);
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}
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static ssize_t set_temp(struct device *dev, struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct emc6w201_data *data = i2c_get_clientdata(client);
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int sf = to_sensor_dev_attr_2(devattr)->index;
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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int err;
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long val;
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u8 reg;
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err = strict_strtol(buf, 10, &val);
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if (err < 0)
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return err;
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val /= 1000;
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reg = (sf == min) ? EMC6W201_REG_TEMP_LOW(nr)
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: EMC6W201_REG_TEMP_HIGH(nr);
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mutex_lock(&data->update_lock);
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data->temp[sf][nr] = SENSORS_LIMIT(val, -127, 128);
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err = i2c_smbus_write_byte_data(client, reg, data->temp[sf][nr]);
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mutex_unlock(&data->update_lock);
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return err < 0 ? err : count;
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}
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static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct emc6w201_data *data = emc6w201_update_device(dev);
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int sf = to_sensor_dev_attr_2(devattr)->index;
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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unsigned rpm;
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if (data->fan[sf][nr] == 0 || data->fan[sf][nr] == 0xFFFF)
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rpm = 0;
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else
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rpm = 5400000U / data->fan[sf][nr];
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return sprintf(buf, "%u\n", rpm);
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}
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static ssize_t set_fan(struct device *dev, struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct emc6w201_data *data = i2c_get_clientdata(client);
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int sf = to_sensor_dev_attr_2(devattr)->index;
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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int err;
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unsigned long val;
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err = strict_strtoul(buf, 10, &val);
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if (err < 0)
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return err;
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if (val == 0) {
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val = 0xFFFF;
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} else {
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val = DIV_ROUND_CLOSEST(5400000U, val);
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val = SENSORS_LIMIT(val, 0, 0xFFFE);
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}
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mutex_lock(&data->update_lock);
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data->fan[sf][nr] = val;
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err = emc6w201_write16(client, EMC6W201_REG_FAN_MIN(nr),
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data->fan[sf][nr]);
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mutex_unlock(&data->update_lock);
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return err < 0 ? err : count;
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}
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static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, input);
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static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
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0, min);
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static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
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0, max);
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static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, input);
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static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
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1, min);
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static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
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1, max);
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static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, input);
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static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
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2, min);
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static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
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2, max);
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static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, input);
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static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
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3, min);
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static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
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3, max);
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static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, input);
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static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
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4, min);
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static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
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4, max);
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static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, input);
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static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
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5, min);
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static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
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5, max);
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static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, input);
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static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
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0, min);
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static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
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0, max);
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static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, input);
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static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
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1, min);
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static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
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1, max);
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static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, input);
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static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
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2, min);
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static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
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2, max);
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static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp, NULL, 3, input);
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static SENSOR_DEVICE_ATTR_2(temp4_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
3, min);
|
||||
static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
3, max);
|
||||
static SENSOR_DEVICE_ATTR_2(temp5_input, S_IRUGO, show_temp, NULL, 4, input);
|
||||
static SENSOR_DEVICE_ATTR_2(temp5_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
4, min);
|
||||
static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
4, max);
|
||||
static SENSOR_DEVICE_ATTR_2(temp6_input, S_IRUGO, show_temp, NULL, 5, input);
|
||||
static SENSOR_DEVICE_ATTR_2(temp6_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
5, min);
|
||||
static SENSOR_DEVICE_ATTR_2(temp6_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
5, max);
|
||||
|
||||
static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, input);
|
||||
static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
|
||||
0, min);
|
||||
static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, input);
|
||||
static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
|
||||
1, min);
|
||||
static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, input);
|
||||
static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
|
||||
2, min);
|
||||
static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, input);
|
||||
static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
|
||||
3, min);
|
||||
static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, input);
|
||||
static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
|
||||
4, min);
|
||||
|
||||
static struct attribute *emc6w201_attributes[] = {
|
||||
&sensor_dev_attr_in0_input.dev_attr.attr,
|
||||
&sensor_dev_attr_in0_min.dev_attr.attr,
|
||||
&sensor_dev_attr_in0_max.dev_attr.attr,
|
||||
&sensor_dev_attr_in1_input.dev_attr.attr,
|
||||
&sensor_dev_attr_in1_min.dev_attr.attr,
|
||||
&sensor_dev_attr_in1_max.dev_attr.attr,
|
||||
&sensor_dev_attr_in2_input.dev_attr.attr,
|
||||
&sensor_dev_attr_in2_min.dev_attr.attr,
|
||||
&sensor_dev_attr_in2_max.dev_attr.attr,
|
||||
&sensor_dev_attr_in3_input.dev_attr.attr,
|
||||
&sensor_dev_attr_in3_min.dev_attr.attr,
|
||||
&sensor_dev_attr_in3_max.dev_attr.attr,
|
||||
&sensor_dev_attr_in4_input.dev_attr.attr,
|
||||
&sensor_dev_attr_in4_min.dev_attr.attr,
|
||||
&sensor_dev_attr_in4_max.dev_attr.attr,
|
||||
&sensor_dev_attr_in5_input.dev_attr.attr,
|
||||
&sensor_dev_attr_in5_min.dev_attr.attr,
|
||||
&sensor_dev_attr_in5_max.dev_attr.attr,
|
||||
|
||||
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp4_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp4_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp4_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp5_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp5_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp5_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp6_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp6_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp6_max.dev_attr.attr,
|
||||
|
||||
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
||||
&sensor_dev_attr_fan1_min.dev_attr.attr,
|
||||
&sensor_dev_attr_fan2_input.dev_attr.attr,
|
||||
&sensor_dev_attr_fan2_min.dev_attr.attr,
|
||||
&sensor_dev_attr_fan3_input.dev_attr.attr,
|
||||
&sensor_dev_attr_fan3_min.dev_attr.attr,
|
||||
&sensor_dev_attr_fan4_input.dev_attr.attr,
|
||||
&sensor_dev_attr_fan4_min.dev_attr.attr,
|
||||
&sensor_dev_attr_fan5_input.dev_attr.attr,
|
||||
&sensor_dev_attr_fan5_min.dev_attr.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group emc6w201_group = {
|
||||
.attrs = emc6w201_attributes,
|
||||
};
|
||||
|
||||
/*
|
||||
* Driver interface
|
||||
*/
|
||||
|
||||
/* Return 0 if detection is successful, -ENODEV otherwise */
|
||||
static int emc6w201_detect(struct i2c_client *client,
|
||||
struct i2c_board_info *info)
|
||||
{
|
||||
struct i2c_adapter *adapter = client->adapter;
|
||||
int company, verstep, config;
|
||||
|
||||
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
||||
return -ENODEV;
|
||||
|
||||
/* Identification */
|
||||
company = i2c_smbus_read_byte_data(client, EMC6W201_REG_COMPANY);
|
||||
if (company != 0x5C)
|
||||
return -ENODEV;
|
||||
verstep = i2c_smbus_read_byte_data(client, EMC6W201_REG_VERSTEP);
|
||||
if (verstep < 0 || (verstep & 0xF0) != 0xB0)
|
||||
return -ENODEV;
|
||||
if ((verstep & 0x0F) > 2) {
|
||||
dev_dbg(&client->dev, "Unknwown EMC6W201 stepping %d\n",
|
||||
verstep & 0x0F);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/* Check configuration */
|
||||
config = i2c_smbus_read_byte_data(client, EMC6W201_REG_CONFIG);
|
||||
if ((config & 0xF4) != 0x04)
|
||||
return -ENODEV;
|
||||
if (!(config & 0x01)) {
|
||||
dev_err(&client->dev, "Monitoring not enabled\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
strlcpy(info->type, "emc6w201", I2C_NAME_SIZE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int emc6w201_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct emc6w201_data *data;
|
||||
int err;
|
||||
|
||||
data = kzalloc(sizeof(struct emc6w201_data), GFP_KERNEL);
|
||||
if (!data) {
|
||||
err = -ENOMEM;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
i2c_set_clientdata(client, data);
|
||||
mutex_init(&data->update_lock);
|
||||
|
||||
/* Create sysfs attribute */
|
||||
err = sysfs_create_group(&client->dev.kobj, &emc6w201_group);
|
||||
if (err)
|
||||
goto exit_free;
|
||||
|
||||
/* Expose as a hwmon device */
|
||||
data->hwmon_dev = hwmon_device_register(&client->dev);
|
||||
if (IS_ERR(data->hwmon_dev)) {
|
||||
err = PTR_ERR(data->hwmon_dev);
|
||||
goto exit_remove;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
exit_remove:
|
||||
sysfs_remove_group(&client->dev.kobj, &emc6w201_group);
|
||||
exit_free:
|
||||
kfree(data);
|
||||
exit:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int emc6w201_remove(struct i2c_client *client)
|
||||
{
|
||||
struct emc6w201_data *data = i2c_get_clientdata(client);
|
||||
|
||||
hwmon_device_unregister(data->hwmon_dev);
|
||||
sysfs_remove_group(&client->dev.kobj, &emc6w201_group);
|
||||
kfree(data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id emc6w201_id[] = {
|
||||
{ "emc6w201", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, emc6w201_id);
|
||||
|
||||
static struct i2c_driver emc6w201_driver = {
|
||||
.class = I2C_CLASS_HWMON,
|
||||
.driver = {
|
||||
.name = "emc6w201",
|
||||
},
|
||||
.probe = emc6w201_probe,
|
||||
.remove = emc6w201_remove,
|
||||
.id_table = emc6w201_id,
|
||||
.detect = emc6w201_detect,
|
||||
.address_list = normal_i2c,
|
||||
};
|
||||
|
||||
static int __init sensors_emc6w201_init(void)
|
||||
{
|
||||
return i2c_add_driver(&emc6w201_driver);
|
||||
}
|
||||
module_init(sensors_emc6w201_init);
|
||||
|
||||
static void __exit sensors_emc6w201_exit(void)
|
||||
{
|
||||
i2c_del_driver(&emc6w201_driver);
|
||||
}
|
||||
module_exit(sensors_emc6w201_exit);
|
||||
|
||||
MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
|
||||
MODULE_DESCRIPTION("SMSC EMC6W201 hardware monitoring driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Reference in New Issue