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b9e39b1b1b
The new-style fscpos driver implements the optional detect() callback to cover the use cases of the legacy driver. Signed-off-by: Jean Delvare <khali@linux-fr.org>
655 lines
19 KiB
C
655 lines
19 KiB
C
/*
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fscpos.c - Kernel module for hardware monitoring with FSC Poseidon chips
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Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch>
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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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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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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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/*
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fujitsu siemens poseidon chip,
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module based on the old fscpos module by Hermann Jung <hej@odn.de> and
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the fscher module by Reinhard Nissl <rnissl@gmx.de>
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original module based on lm80.c
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Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
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and Philip Edelbrock <phil@netroedge.com>
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Thanks to Jean Delvare for reviewing my code and suggesting a lot of
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improvements.
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*/
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#include <linux/module.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/init.h>
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#include <linux/hwmon.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/sysfs.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[] = { 0x73, I2C_CLIENT_END };
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/*
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* Insmod parameters
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*/
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I2C_CLIENT_INSMOD_1(fscpos);
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/*
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* The FSCPOS registers
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*/
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/* chip identification */
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#define FSCPOS_REG_IDENT_0 0x00
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#define FSCPOS_REG_IDENT_1 0x01
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#define FSCPOS_REG_IDENT_2 0x02
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#define FSCPOS_REG_REVISION 0x03
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/* global control and status */
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#define FSCPOS_REG_EVENT_STATE 0x04
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#define FSCPOS_REG_CONTROL 0x05
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/* watchdog */
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#define FSCPOS_REG_WDOG_PRESET 0x28
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#define FSCPOS_REG_WDOG_STATE 0x23
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#define FSCPOS_REG_WDOG_CONTROL 0x21
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/* voltages */
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#define FSCPOS_REG_VOLT_12 0x45
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#define FSCPOS_REG_VOLT_5 0x42
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#define FSCPOS_REG_VOLT_BATT 0x48
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/* fans - the chip does not support minimum speed for fan2 */
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static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 };
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static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab };
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static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 };
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static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf };
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/* temperatures */
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static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 };
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static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 };
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/*
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* Functions declaration
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*/
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static int fscpos_probe(struct i2c_client *client,
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const struct i2c_device_id *id);
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static int fscpos_detect(struct i2c_client *client, int kind,
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struct i2c_board_info *info);
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static int fscpos_remove(struct i2c_client *client);
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static int fscpos_read_value(struct i2c_client *client, u8 reg);
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static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value);
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static struct fscpos_data *fscpos_update_device(struct device *dev);
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static void fscpos_init_client(struct i2c_client *client);
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static void reset_fan_alarm(struct i2c_client *client, int nr);
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/*
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* Driver data (common to all clients)
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*/
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static const struct i2c_device_id fscpos_id[] = {
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{ "fscpos", fscpos },
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{ }
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};
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static struct i2c_driver fscpos_driver = {
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.class = I2C_CLASS_HWMON,
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.driver = {
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.name = "fscpos",
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},
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.probe = fscpos_probe,
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.remove = fscpos_remove,
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.id_table = fscpos_id,
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.detect = fscpos_detect,
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.address_data = &addr_data,
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};
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/*
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* Client data (each client gets its own)
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*/
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struct fscpos_data {
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struct device *hwmon_dev;
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struct mutex update_lock;
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char valid; /* 0 until following fields are valid */
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unsigned long last_updated; /* In jiffies */
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/* register values */
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u8 revision; /* revision of chip */
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u8 global_event; /* global event status */
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u8 global_control; /* global control register */
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u8 wdog_control; /* watchdog control */
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u8 wdog_state; /* watchdog status */
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u8 wdog_preset; /* watchdog preset */
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u8 volt[3]; /* 12, 5, battery current */
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u8 temp_act[3]; /* temperature */
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u8 temp_status[3]; /* status of sensor */
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u8 fan_act[3]; /* fans revolutions per second */
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u8 fan_status[3]; /* fan status */
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u8 pwm[2]; /* fan min value for rps */
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u8 fan_ripple[3]; /* divider for rps */
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};
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/* Temperature */
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#define TEMP_FROM_REG(val) (((val) - 128) * 1000)
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static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr)
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{
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1]));
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}
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static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr)
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{
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/* bits 2..7 reserved => mask with 0x03 */
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return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03);
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}
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static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr)
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{
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return sprintf(buf, "1\n");
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}
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static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data
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*data, const char *buf, size_t count, int nr, int reg)
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{
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unsigned long v = simple_strtoul(buf, NULL, 10);
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if (v != 1) {
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dev_err(&client->dev, "temp_reset value %ld not supported. "
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"Use 1 to reset the alarm!\n", v);
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return -EINVAL;
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}
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dev_info(&client->dev, "You used the temp_reset feature which has not "
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"been proplerly tested. Please report your "
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"experience to the module author.\n");
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/* Supported value: 2 (clears the status) */
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fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2);
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return count;
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}
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/* Fans */
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#define RPM_FROM_REG(val) ((val) * 60)
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static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr)
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{
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/* bits 0..1, 3..7 reserved => mask with 0x04 */
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return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04);
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}
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static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr)
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{
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return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1]));
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}
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static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr)
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{
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/* bits 2..7 reserved => mask with 0x03 */
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return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03);
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}
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static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data
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*data, const char *buf, size_t count, int nr, int reg)
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{
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/* supported values: 2, 4, 8 */
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unsigned long v = simple_strtoul(buf, NULL, 10);
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switch (v) {
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case 2: v = 1; break;
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case 4: v = 2; break;
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case 8: v = 3; break;
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default:
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dev_err(&client->dev, "fan_ripple value %ld not supported. "
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"Must be one of 2, 4 or 8!\n", v);
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return -EINVAL;
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}
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mutex_lock(&data->update_lock);
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/* bits 2..7 reserved => mask with 0x03 */
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data->fan_ripple[nr - 1] &= ~0x03;
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data->fan_ripple[nr - 1] |= v;
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fscpos_write_value(client, reg, data->fan_ripple[nr - 1]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr)
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{
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return sprintf(buf, "%u\n", data->pwm[nr - 1]);
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}
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static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data,
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const char *buf, size_t count, int nr, int reg)
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{
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unsigned long v = simple_strtoul(buf, NULL, 10);
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/* Range: 0..255 */
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if (v < 0) v = 0;
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if (v > 255) v = 255;
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mutex_lock(&data->update_lock);
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data->pwm[nr - 1] = v;
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fscpos_write_value(client, reg, data->pwm[nr - 1]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static void reset_fan_alarm(struct i2c_client *client, int nr)
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{
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fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4);
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}
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/* Volts */
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#define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255)
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static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct fscpos_data *data = fscpos_update_device(dev);
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return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200));
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}
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static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct fscpos_data *data = fscpos_update_device(dev);
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return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600));
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}
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static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct fscpos_data *data = fscpos_update_device(dev);
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return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300));
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}
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/* Watchdog */
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static ssize_t show_wdog_control(struct fscpos_data *data, char *buf)
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{
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/* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */
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return sprintf(buf, "%u\n", data->wdog_control & 0xb0);
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}
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static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data
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*data, const char *buf, size_t count, int reg)
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{
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/* bits 0..3 reserved => mask with 0xf0 */
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unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
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mutex_lock(&data->update_lock);
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data->wdog_control &= ~0xf0;
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data->wdog_control |= v;
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fscpos_write_value(client, reg, data->wdog_control);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_wdog_state(struct fscpos_data *data, char *buf)
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{
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/* bits 0, 2..7 reserved => mask with 0x02 */
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return sprintf(buf, "%u\n", data->wdog_state & 0x02);
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}
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static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data
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*data, const char *buf, size_t count, int reg)
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{
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unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
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/* Valid values: 2 (clear) */
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if (v != 2) {
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dev_err(&client->dev, "wdog_state value %ld not supported. "
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"Must be 2 to clear the state!\n", v);
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return -EINVAL;
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}
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mutex_lock(&data->update_lock);
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data->wdog_state &= ~v;
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fscpos_write_value(client, reg, v);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf)
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{
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return sprintf(buf, "%u\n", data->wdog_preset);
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}
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static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data
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*data, const char *buf, size_t count, int reg)
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{
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unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
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mutex_lock(&data->update_lock);
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data->wdog_preset = v;
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fscpos_write_value(client, reg, data->wdog_preset);
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mutex_unlock(&data->update_lock);
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return count;
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}
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/* Event */
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static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf)
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{
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/* bits 5..7 reserved => mask with 0x1f */
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struct fscpos_data *data = fscpos_update_device(dev);
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return sprintf(buf, "%u\n", data->global_event & 0x9b);
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}
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/*
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* Sysfs stuff
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*/
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#define create_getter(kind, sub) \
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static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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struct fscpos_data *data = fscpos_update_device(dev); \
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return show_##kind##sub(data, buf); \
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}
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#define create_getter_n(kind, offset, sub) \
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static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\
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*buf) \
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{ \
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struct fscpos_data *data = fscpos_update_device(dev); \
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return show_##kind##sub(data, buf, offset); \
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}
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#define create_setter(kind, sub, reg) \
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static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \
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*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 fscpos_data *data = i2c_get_clientdata(client); \
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return set_##kind##sub(client, data, buf, count, reg); \
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}
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#define create_setter_n(kind, offset, sub, reg) \
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static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \
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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 fscpos_data *data = i2c_get_clientdata(client); \
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return set_##kind##sub(client, data, buf, count, offset, reg);\
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}
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#define create_sysfs_device_ro(kind, sub, offset) \
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static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \
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sysfs_show_##kind##offset##sub, NULL);
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#define create_sysfs_device_rw(kind, sub, offset) \
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static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \
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sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub);
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#define sysfs_ro_n(kind, sub, offset) \
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create_getter_n(kind, offset, sub); \
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create_sysfs_device_ro(kind, sub, offset);
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#define sysfs_rw_n(kind, sub, offset, reg) \
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create_getter_n(kind, offset, sub); \
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create_setter_n(kind, offset, sub, reg); \
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create_sysfs_device_rw(kind, sub, offset);
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#define sysfs_rw(kind, sub, reg) \
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create_getter(kind, sub); \
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create_setter(kind, sub, reg); \
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create_sysfs_device_rw(kind, sub,);
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#define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \
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sysfs_fan(offset, reg_status, reg_ripple); \
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sysfs_rw_n(pwm,, offset, reg_min);
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#define sysfs_fan(offset, reg_status, reg_ripple) \
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sysfs_ro_n(fan, _input, offset); \
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sysfs_ro_n(fan, _status, offset); \
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sysfs_rw_n(fan, _ripple, offset, reg_ripple);
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#define sysfs_temp(offset, reg_status) \
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sysfs_ro_n(temp, _input, offset); \
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sysfs_ro_n(temp, _status, offset); \
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sysfs_rw_n(temp, _reset, offset, reg_status);
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#define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \
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sysfs_rw(wdog, _control, reg_wdog_control); \
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sysfs_rw(wdog, _preset, reg_wdog_preset); \
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sysfs_rw(wdog, _state, reg_wdog_state);
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sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0],
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FSCPOS_REG_PWM[0]);
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sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1],
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FSCPOS_REG_PWM[1]);
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sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]);
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sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]);
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sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]);
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sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]);
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sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE,
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FSCPOS_REG_WDOG_CONTROL);
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static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
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static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL);
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static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL);
|
|
static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL);
|
|
|
|
static struct attribute *fscpos_attributes[] = {
|
|
&dev_attr_event.attr,
|
|
&dev_attr_in0_input.attr,
|
|
&dev_attr_in1_input.attr,
|
|
&dev_attr_in2_input.attr,
|
|
|
|
&dev_attr_wdog_control.attr,
|
|
&dev_attr_wdog_preset.attr,
|
|
&dev_attr_wdog_state.attr,
|
|
|
|
&dev_attr_temp1_input.attr,
|
|
&dev_attr_temp1_status.attr,
|
|
&dev_attr_temp1_reset.attr,
|
|
&dev_attr_temp2_input.attr,
|
|
&dev_attr_temp2_status.attr,
|
|
&dev_attr_temp2_reset.attr,
|
|
&dev_attr_temp3_input.attr,
|
|
&dev_attr_temp3_status.attr,
|
|
&dev_attr_temp3_reset.attr,
|
|
|
|
&dev_attr_fan1_input.attr,
|
|
&dev_attr_fan1_status.attr,
|
|
&dev_attr_fan1_ripple.attr,
|
|
&dev_attr_pwm1.attr,
|
|
&dev_attr_fan2_input.attr,
|
|
&dev_attr_fan2_status.attr,
|
|
&dev_attr_fan2_ripple.attr,
|
|
&dev_attr_pwm2.attr,
|
|
&dev_attr_fan3_input.attr,
|
|
&dev_attr_fan3_status.attr,
|
|
&dev_attr_fan3_ripple.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group fscpos_group = {
|
|
.attrs = fscpos_attributes,
|
|
};
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int fscpos_detect(struct i2c_client *new_client, int kind,
|
|
struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = new_client->adapter;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* Do the remaining detection unless force or force_fscpos parameter */
|
|
if (kind < 0) {
|
|
if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0)
|
|
!= 0x50) /* 'P' */
|
|
|| (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1)
|
|
!= 0x45) /* 'E' */
|
|
|| (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2)
|
|
!= 0x47))/* 'G' */
|
|
return -ENODEV;
|
|
}
|
|
|
|
strlcpy(info->type, "fscpos", I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fscpos_probe(struct i2c_client *new_client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct fscpos_data *data;
|
|
int err;
|
|
|
|
data = kzalloc(sizeof(struct fscpos_data), GFP_KERNEL);
|
|
if (!data) {
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
i2c_set_clientdata(new_client, data);
|
|
data->valid = 0;
|
|
mutex_init(&data->update_lock);
|
|
|
|
/* Inizialize the fscpos chip */
|
|
fscpos_init_client(new_client);
|
|
|
|
/* Announce that the chip was found */
|
|
dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision);
|
|
|
|
/* Register sysfs hooks */
|
|
if ((err = sysfs_create_group(&new_client->dev.kobj, &fscpos_group)))
|
|
goto exit_free;
|
|
|
|
data->hwmon_dev = hwmon_device_register(&new_client->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
goto exit_remove_files;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_remove_files:
|
|
sysfs_remove_group(&new_client->dev.kobj, &fscpos_group);
|
|
exit_free:
|
|
kfree(data);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int fscpos_remove(struct i2c_client *client)
|
|
{
|
|
struct fscpos_data *data = i2c_get_clientdata(client);
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
sysfs_remove_group(&client->dev.kobj, &fscpos_group);
|
|
|
|
kfree(data);
|
|
return 0;
|
|
}
|
|
|
|
static int fscpos_read_value(struct i2c_client *client, u8 reg)
|
|
{
|
|
dev_dbg(&client->dev, "Read reg 0x%02x\n", reg);
|
|
return i2c_smbus_read_byte_data(client, reg);
|
|
}
|
|
|
|
static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value)
|
|
{
|
|
dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value);
|
|
return i2c_smbus_write_byte_data(client, reg, value);
|
|
}
|
|
|
|
/* Called when we have found a new FSCPOS chip */
|
|
static void fscpos_init_client(struct i2c_client *client)
|
|
{
|
|
struct fscpos_data *data = i2c_get_clientdata(client);
|
|
|
|
/* read revision from chip */
|
|
data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION);
|
|
}
|
|
|
|
static struct fscpos_data *fscpos_update_device(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct fscpos_data *data = i2c_get_clientdata(client);
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
|
|
int i;
|
|
|
|
dev_dbg(&client->dev, "Starting fscpos update\n");
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
data->temp_act[i] = fscpos_read_value(client,
|
|
FSCPOS_REG_TEMP_ACT[i]);
|
|
data->temp_status[i] = fscpos_read_value(client,
|
|
FSCPOS_REG_TEMP_STATE[i]);
|
|
data->fan_act[i] = fscpos_read_value(client,
|
|
FSCPOS_REG_FAN_ACT[i]);
|
|
data->fan_status[i] = fscpos_read_value(client,
|
|
FSCPOS_REG_FAN_STATE[i]);
|
|
data->fan_ripple[i] = fscpos_read_value(client,
|
|
FSCPOS_REG_FAN_RIPPLE[i]);
|
|
if (i < 2) {
|
|
/* fan2_min is not supported by the chip */
|
|
data->pwm[i] = fscpos_read_value(client,
|
|
FSCPOS_REG_PWM[i]);
|
|
}
|
|
/* reset fan status if speed is back to > 0 */
|
|
if (data->fan_status[i] != 0 && data->fan_act[i] > 0) {
|
|
reset_fan_alarm(client, i);
|
|
}
|
|
}
|
|
|
|
data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12);
|
|
data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5);
|
|
data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT);
|
|
|
|
data->wdog_preset = fscpos_read_value(client,
|
|
FSCPOS_REG_WDOG_PRESET);
|
|
data->wdog_state = fscpos_read_value(client,
|
|
FSCPOS_REG_WDOG_STATE);
|
|
data->wdog_control = fscpos_read_value(client,
|
|
FSCPOS_REG_WDOG_CONTROL);
|
|
|
|
data->global_event = fscpos_read_value(client,
|
|
FSCPOS_REG_EVENT_STATE);
|
|
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
}
|
|
mutex_unlock(&data->update_lock);
|
|
return data;
|
|
}
|
|
|
|
static int __init sm_fscpos_init(void)
|
|
{
|
|
return i2c_add_driver(&fscpos_driver);
|
|
}
|
|
|
|
static void __exit sm_fscpos_exit(void)
|
|
{
|
|
i2c_del_driver(&fscpos_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung "
|
|
"<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>"
|
|
" and Philip Edelbrock <phil@netroedge.com>");
|
|
MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(sm_fscpos_init);
|
|
module_exit(sm_fscpos_exit);
|