2 * fscher.c - Part of lm_sensors, Linux kernel modules for hardware
4 * Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@gmx.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * fujitsu siemens hermes chip,
23 * module based on fscpos.c
24 * Copyright (C) 2000 Hermann Jung <hej@odn.de>
25 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
26 * and Philip Edelbrock <phil@netroedge.com>
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/jiffies.h>
33 #include <linux/i2c.h>
34 #include <linux/i2c-sensor.h>
40 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
41 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
47 SENSORS_INSMOD_1(fscher);
50 * The FSCHER registers
53 /* chip identification */
54 #define FSCHER_REG_IDENT_0 0x00
55 #define FSCHER_REG_IDENT_1 0x01
56 #define FSCHER_REG_IDENT_2 0x02
57 #define FSCHER_REG_REVISION 0x03
59 /* global control and status */
60 #define FSCHER_REG_EVENT_STATE 0x04
61 #define FSCHER_REG_CONTROL 0x05
64 #define FSCHER_REG_WDOG_PRESET 0x28
65 #define FSCHER_REG_WDOG_STATE 0x23
66 #define FSCHER_REG_WDOG_CONTROL 0x21
69 #define FSCHER_REG_FAN0_MIN 0x55
70 #define FSCHER_REG_FAN0_ACT 0x0e
71 #define FSCHER_REG_FAN0_STATE 0x0d
72 #define FSCHER_REG_FAN0_RIPPLE 0x0f
75 #define FSCHER_REG_FAN1_MIN 0x65
76 #define FSCHER_REG_FAN1_ACT 0x6b
77 #define FSCHER_REG_FAN1_STATE 0x62
78 #define FSCHER_REG_FAN1_RIPPLE 0x6f
81 #define FSCHER_REG_FAN2_MIN 0xb5
82 #define FSCHER_REG_FAN2_ACT 0xbb
83 #define FSCHER_REG_FAN2_STATE 0xb2
84 #define FSCHER_REG_FAN2_RIPPLE 0xbf
86 /* voltage supervision */
87 #define FSCHER_REG_VOLT_12 0x45
88 #define FSCHER_REG_VOLT_5 0x42
89 #define FSCHER_REG_VOLT_BATT 0x48
92 #define FSCHER_REG_TEMP0_ACT 0x64
93 #define FSCHER_REG_TEMP0_STATE 0x71
96 #define FSCHER_REG_TEMP1_ACT 0x32
97 #define FSCHER_REG_TEMP1_STATE 0x81
100 #define FSCHER_REG_TEMP2_ACT 0x35
101 #define FSCHER_REG_TEMP2_STATE 0x91
104 * Functions declaration
107 static int fscher_attach_adapter(struct i2c_adapter *adapter);
108 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind);
109 static int fscher_detach_client(struct i2c_client *client);
110 static struct fscher_data *fscher_update_device(struct device *dev);
111 static void fscher_init_client(struct i2c_client *client);
113 static int fscher_read_value(struct i2c_client *client, u8 reg);
114 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);
117 * Driver data (common to all clients)
120 static struct i2c_driver fscher_driver = {
121 .owner = THIS_MODULE,
123 .id = I2C_DRIVERID_FSCHER,
124 .flags = I2C_DF_NOTIFY,
125 .attach_adapter = fscher_attach_adapter,
126 .detach_client = fscher_detach_client,
130 * Client data (each client gets its own)
134 struct i2c_client client;
135 struct semaphore update_lock;
136 char valid; /* zero until following fields are valid */
137 unsigned long last_updated; /* in jiffies */
139 /* register values */
140 u8 revision; /* revision of chip */
141 u8 global_event; /* global event status */
142 u8 global_control; /* global control register */
143 u8 watchdog[3]; /* watchdog */
144 u8 volt[3]; /* 12, 5, battery voltage */
145 u8 temp_act[3]; /* temperature */
146 u8 temp_status[3]; /* status of sensor */
147 u8 fan_act[3]; /* fans revolutions per second */
148 u8 fan_status[3]; /* fan status */
149 u8 fan_min[3]; /* fan min value for rps */
150 u8 fan_ripple[3]; /* divider for rps */
157 #define sysfs_r(kind, sub, offset, reg) \
158 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
159 static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
160 static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
162 struct fscher_data *data = fscher_update_device(dev); \
163 return show_##kind##sub(data, buf, (offset)); \
166 #define sysfs_w(kind, sub, offset, reg) \
167 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
168 static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
169 static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
171 struct i2c_client *client = to_i2c_client(dev); \
172 struct fscher_data *data = i2c_get_clientdata(client); \
173 return set_##kind##sub(client, data, buf, count, (offset), reg); \
176 #define sysfs_rw_n(kind, sub, offset, reg) \
177 sysfs_r(kind, sub, offset, reg) \
178 sysfs_w(kind, sub, offset, reg) \
179 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
181 #define sysfs_rw(kind, sub, reg) \
182 sysfs_r(kind, sub, 0, reg) \
183 sysfs_w(kind, sub, 0, reg) \
184 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
186 #define sysfs_ro_n(kind, sub, offset, reg) \
187 sysfs_r(kind, sub, offset, reg) \
188 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
190 #define sysfs_ro(kind, sub, reg) \
191 sysfs_r(kind, sub, 0, reg) \
192 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
194 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
195 sysfs_rw_n(pwm, , offset, reg_min) \
196 sysfs_rw_n(fan, _status, offset, reg_status) \
197 sysfs_rw_n(fan, _div , offset, reg_ripple) \
198 sysfs_ro_n(fan, _input , offset, reg_act)
200 #define sysfs_temp(offset, reg_status, reg_act) \
201 sysfs_rw_n(temp, _status, offset, reg_status) \
202 sysfs_ro_n(temp, _input , offset, reg_act)
204 #define sysfs_in(offset, reg_act) \
205 sysfs_ro_n(in, _input, offset, reg_act)
207 #define sysfs_revision(reg_revision) \
208 sysfs_ro(revision, , reg_revision)
210 #define sysfs_alarms(reg_events) \
211 sysfs_ro(alarms, , reg_events)
213 #define sysfs_control(reg_control) \
214 sysfs_rw(control, , reg_control)
216 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
217 sysfs_rw(watchdog, _control, reg_control) \
218 sysfs_rw(watchdog, _status , reg_status) \
219 sysfs_rw(watchdog, _preset , reg_preset)
221 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
222 FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
223 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
224 FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
225 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
226 FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
228 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
229 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
230 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
232 sysfs_in(0, FSCHER_REG_VOLT_12)
233 sysfs_in(1, FSCHER_REG_VOLT_5)
234 sysfs_in(2, FSCHER_REG_VOLT_BATT)
236 sysfs_revision(FSCHER_REG_REVISION)
237 sysfs_alarms(FSCHER_REG_EVENTS)
238 sysfs_control(FSCHER_REG_CONTROL)
239 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
241 #define device_create_file_fan(client, offset) \
243 device_create_file(&client->dev, &dev_attr_fan##offset##_status); \
244 device_create_file(&client->dev, &dev_attr_pwm##offset); \
245 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
246 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
249 #define device_create_file_temp(client, offset) \
251 device_create_file(&client->dev, &dev_attr_temp##offset##_status); \
252 device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
255 #define device_create_file_in(client, offset) \
257 device_create_file(&client->dev, &dev_attr_in##offset##_input); \
260 #define device_create_file_revision(client) \
262 device_create_file(&client->dev, &dev_attr_revision); \
265 #define device_create_file_alarms(client) \
267 device_create_file(&client->dev, &dev_attr_alarms); \
270 #define device_create_file_control(client) \
272 device_create_file(&client->dev, &dev_attr_control); \
275 #define device_create_file_watchdog(client) \
277 device_create_file(&client->dev, &dev_attr_watchdog_status); \
278 device_create_file(&client->dev, &dev_attr_watchdog_control); \
279 device_create_file(&client->dev, &dev_attr_watchdog_preset); \
286 static int fscher_attach_adapter(struct i2c_adapter *adapter)
288 if (!(adapter->class & I2C_CLASS_HWMON))
290 return i2c_detect(adapter, &addr_data, fscher_detect);
293 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
295 struct i2c_client *new_client;
296 struct fscher_data *data;
299 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
302 /* OK. For now, we presume we have a valid client. We now create the
303 * client structure, even though we cannot fill it completely yet.
304 * But it allows us to access i2c_smbus_read_byte_data. */
305 if (!(data = kmalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
309 memset(data, 0, sizeof(struct fscher_data));
311 /* The common I2C client data is placed right before the
312 * Hermes-specific data. */
313 new_client = &data->client;
314 i2c_set_clientdata(new_client, data);
315 new_client->addr = address;
316 new_client->adapter = adapter;
317 new_client->driver = &fscher_driver;
318 new_client->flags = 0;
320 /* Do the remaining detection unless force or force_fscher parameter */
322 if ((i2c_smbus_read_byte_data(new_client,
323 FSCHER_REG_IDENT_0) != 0x48) /* 'H' */
324 || (i2c_smbus_read_byte_data(new_client,
325 FSCHER_REG_IDENT_1) != 0x45) /* 'E' */
326 || (i2c_smbus_read_byte_data(new_client,
327 FSCHER_REG_IDENT_2) != 0x52)) /* 'R' */
331 /* Fill in the remaining client fields and put it into the
333 strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
335 init_MUTEX(&data->update_lock);
337 /* Tell the I2C layer a new client has arrived */
338 if ((err = i2c_attach_client(new_client)))
341 fscher_init_client(new_client);
343 /* Register sysfs hooks */
344 device_create_file_revision(new_client);
345 device_create_file_alarms(new_client);
346 device_create_file_control(new_client);
347 device_create_file_watchdog(new_client);
349 device_create_file_in(new_client, 0);
350 device_create_file_in(new_client, 1);
351 device_create_file_in(new_client, 2);
353 device_create_file_fan(new_client, 1);
354 device_create_file_fan(new_client, 2);
355 device_create_file_fan(new_client, 3);
357 device_create_file_temp(new_client, 1);
358 device_create_file_temp(new_client, 2);
359 device_create_file_temp(new_client, 3);
369 static int fscher_detach_client(struct i2c_client *client)
373 if ((err = i2c_detach_client(client))) {
374 dev_err(&client->dev, "Client deregistration failed, "
375 "client not detached.\n");
379 kfree(i2c_get_clientdata(client));
383 static int fscher_read_value(struct i2c_client *client, u8 reg)
385 dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
387 return i2c_smbus_read_byte_data(client, reg);
390 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
392 dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
395 return i2c_smbus_write_byte_data(client, reg, value);
398 /* Called when we have found a new FSC Hermes. */
399 static void fscher_init_client(struct i2c_client *client)
401 struct fscher_data *data = i2c_get_clientdata(client);
403 /* Read revision from chip */
404 data->revision = fscher_read_value(client, FSCHER_REG_REVISION);
407 static struct fscher_data *fscher_update_device(struct device *dev)
409 struct i2c_client *client = to_i2c_client(dev);
410 struct fscher_data *data = i2c_get_clientdata(client);
412 down(&data->update_lock);
414 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
416 dev_dbg(&client->dev, "Starting fscher update\n");
418 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
419 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
420 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
421 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
422 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
423 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
425 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
426 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
427 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
429 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
430 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
431 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
432 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
433 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
434 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
435 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
436 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
437 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
438 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
439 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
440 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
442 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
443 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
444 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
446 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
448 data->last_updated = jiffies;
452 up(&data->update_lock);
459 #define FAN_INDEX_FROM_NUM(nr) ((nr) - 1)
461 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
462 const char *buf, size_t count, int nr, int reg)
464 /* bits 0..1, 3..7 reserved => mask with 0x04 */
465 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
467 down(&data->update_lock);
468 data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
469 fscher_write_value(client, reg, v);
470 up(&data->update_lock);
474 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
476 /* bits 0..1, 3..7 reserved => mask with 0x04 */
477 return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
480 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
481 const char *buf, size_t count, int nr, int reg)
483 unsigned long v = simple_strtoul(buf, NULL, 10);
485 down(&data->update_lock);
486 data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
487 fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
488 up(&data->update_lock);
492 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
494 return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
497 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
498 const char *buf, size_t count, int nr, int reg)
500 /* supported values: 2, 4, 8 */
501 unsigned long v = simple_strtoul(buf, NULL, 10);
504 case 2: v = 1; break;
505 case 4: v = 2; break;
506 case 8: v = 3; break;
508 dev_err(&client->dev, "fan_div value %ld not "
509 "supported. Choose one of 2, 4 or 8!\n", v);
513 down(&data->update_lock);
515 /* bits 2..7 reserved => mask with 0x03 */
516 data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
517 data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
519 fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
520 up(&data->update_lock);
524 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
526 /* bits 2..7 reserved => mask with 0x03 */
527 return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
530 #define RPM_FROM_REG(val) (val*60)
532 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
534 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
539 #define TEMP_INDEX_FROM_NUM(nr) ((nr) - 1)
541 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
542 const char *buf, size_t count, int nr, int reg)
544 /* bits 2..7 reserved, 0 read only => mask with 0x02 */
545 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
547 down(&data->update_lock);
548 data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
549 fscher_write_value(client, reg, v);
550 up(&data->update_lock);
554 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
556 /* bits 2..7 reserved => mask with 0x03 */
557 return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
560 #define TEMP_FROM_REG(val) (((val) - 128) * 1000)
562 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
564 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
568 * The final conversion is specified in sensors.conf, as it depends on
569 * mainboard specific values. We export the registers contents as
570 * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
571 * sense per se, but it minimizes the conversions count and keeps the
572 * values within a usual range.
574 #define VOLT_FROM_REG(val) ((val) * 10)
576 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
578 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
583 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
585 return sprintf(buf, "%u\n", data->revision);
590 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
592 /* bits 2, 5..6 reserved => mask with 0x9b */
593 return sprintf(buf, "%u\n", data->global_event & 0x9b);
598 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
599 const char *buf, size_t count, int nr, int reg)
601 /* bits 1..7 reserved => mask with 0x01 */
602 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
604 down(&data->update_lock);
605 data->global_control &= ~v;
606 fscher_write_value(client, reg, v);
607 up(&data->update_lock);
611 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
613 /* bits 1..7 reserved => mask with 0x01 */
614 return sprintf(buf, "%u\n", data->global_control & 0x01);
619 static ssize_t set_watchdog_control(struct i2c_client *client, struct
620 fscher_data *data, const char *buf, size_t count,
623 /* bits 0..3 reserved => mask with 0xf0 */
624 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
626 down(&data->update_lock);
627 data->watchdog[2] &= ~0xf0;
628 data->watchdog[2] |= v;
629 fscher_write_value(client, reg, data->watchdog[2]);
630 up(&data->update_lock);
634 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
636 /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
637 return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
640 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
641 const char *buf, size_t count, int nr, int reg)
643 /* bits 0, 2..7 reserved => mask with 0x02 */
644 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
646 down(&data->update_lock);
647 data->watchdog[1] &= ~v;
648 fscher_write_value(client, reg, v);
649 up(&data->update_lock);
653 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
655 /* bits 0, 2..7 reserved => mask with 0x02 */
656 return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
659 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
660 const char *buf, size_t count, int nr, int reg)
662 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
664 down(&data->update_lock);
665 data->watchdog[0] = v;
666 fscher_write_value(client, reg, data->watchdog[0]);
667 up(&data->update_lock);
671 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
673 return sprintf(buf, "%u\n", data->watchdog[0]);
676 static int __init sensors_fscher_init(void)
678 return i2c_add_driver(&fscher_driver);
681 static void __exit sensors_fscher_exit(void)
683 i2c_del_driver(&fscher_driver);
686 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
687 MODULE_DESCRIPTION("FSC Hermes driver");
688 MODULE_LICENSE("GPL");
690 module_init(sensors_fscher_init);
691 module_exit(sensors_fscher_exit);