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>
35 #include <linux/hwmon.h>
36 #include <linux/err.h>
42 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
48 SENSORS_INSMOD_1(fscher);
51 * The FSCHER registers
54 /* chip identification */
55 #define FSCHER_REG_IDENT_0 0x00
56 #define FSCHER_REG_IDENT_1 0x01
57 #define FSCHER_REG_IDENT_2 0x02
58 #define FSCHER_REG_REVISION 0x03
60 /* global control and status */
61 #define FSCHER_REG_EVENT_STATE 0x04
62 #define FSCHER_REG_CONTROL 0x05
65 #define FSCHER_REG_WDOG_PRESET 0x28
66 #define FSCHER_REG_WDOG_STATE 0x23
67 #define FSCHER_REG_WDOG_CONTROL 0x21
70 #define FSCHER_REG_FAN0_MIN 0x55
71 #define FSCHER_REG_FAN0_ACT 0x0e
72 #define FSCHER_REG_FAN0_STATE 0x0d
73 #define FSCHER_REG_FAN0_RIPPLE 0x0f
76 #define FSCHER_REG_FAN1_MIN 0x65
77 #define FSCHER_REG_FAN1_ACT 0x6b
78 #define FSCHER_REG_FAN1_STATE 0x62
79 #define FSCHER_REG_FAN1_RIPPLE 0x6f
82 #define FSCHER_REG_FAN2_MIN 0xb5
83 #define FSCHER_REG_FAN2_ACT 0xbb
84 #define FSCHER_REG_FAN2_STATE 0xb2
85 #define FSCHER_REG_FAN2_RIPPLE 0xbf
87 /* voltage supervision */
88 #define FSCHER_REG_VOLT_12 0x45
89 #define FSCHER_REG_VOLT_5 0x42
90 #define FSCHER_REG_VOLT_BATT 0x48
93 #define FSCHER_REG_TEMP0_ACT 0x64
94 #define FSCHER_REG_TEMP0_STATE 0x71
97 #define FSCHER_REG_TEMP1_ACT 0x32
98 #define FSCHER_REG_TEMP1_STATE 0x81
101 #define FSCHER_REG_TEMP2_ACT 0x35
102 #define FSCHER_REG_TEMP2_STATE 0x91
105 * Functions declaration
108 static int fscher_attach_adapter(struct i2c_adapter *adapter);
109 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind);
110 static int fscher_detach_client(struct i2c_client *client);
111 static struct fscher_data *fscher_update_device(struct device *dev);
112 static void fscher_init_client(struct i2c_client *client);
114 static int fscher_read_value(struct i2c_client *client, u8 reg);
115 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);
118 * Driver data (common to all clients)
121 static struct i2c_driver fscher_driver = {
122 .owner = THIS_MODULE,
124 .id = I2C_DRIVERID_FSCHER,
125 .flags = I2C_DF_NOTIFY,
126 .attach_adapter = fscher_attach_adapter,
127 .detach_client = fscher_detach_client,
131 * Client data (each client gets its own)
135 struct i2c_client client;
136 struct class_device *class_dev;
137 struct semaphore update_lock;
138 char valid; /* zero until following fields are valid */
139 unsigned long last_updated; /* in jiffies */
141 /* register values */
142 u8 revision; /* revision of chip */
143 u8 global_event; /* global event status */
144 u8 global_control; /* global control register */
145 u8 watchdog[3]; /* watchdog */
146 u8 volt[3]; /* 12, 5, battery voltage */
147 u8 temp_act[3]; /* temperature */
148 u8 temp_status[3]; /* status of sensor */
149 u8 fan_act[3]; /* fans revolutions per second */
150 u8 fan_status[3]; /* fan status */
151 u8 fan_min[3]; /* fan min value for rps */
152 u8 fan_ripple[3]; /* divider for rps */
159 #define sysfs_r(kind, sub, offset, reg) \
160 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
161 static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
162 static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
164 struct fscher_data *data = fscher_update_device(dev); \
165 return show_##kind##sub(data, buf, (offset)); \
168 #define sysfs_w(kind, sub, offset, reg) \
169 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
170 static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
171 static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
173 struct i2c_client *client = to_i2c_client(dev); \
174 struct fscher_data *data = i2c_get_clientdata(client); \
175 return set_##kind##sub(client, data, buf, count, (offset), reg); \
178 #define sysfs_rw_n(kind, sub, offset, reg) \
179 sysfs_r(kind, sub, offset, reg) \
180 sysfs_w(kind, sub, offset, reg) \
181 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
183 #define sysfs_rw(kind, sub, reg) \
184 sysfs_r(kind, sub, 0, reg) \
185 sysfs_w(kind, sub, 0, reg) \
186 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
188 #define sysfs_ro_n(kind, sub, offset, reg) \
189 sysfs_r(kind, sub, offset, reg) \
190 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
192 #define sysfs_ro(kind, sub, reg) \
193 sysfs_r(kind, sub, 0, reg) \
194 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
196 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
197 sysfs_rw_n(pwm, , offset, reg_min) \
198 sysfs_rw_n(fan, _status, offset, reg_status) \
199 sysfs_rw_n(fan, _div , offset, reg_ripple) \
200 sysfs_ro_n(fan, _input , offset, reg_act)
202 #define sysfs_temp(offset, reg_status, reg_act) \
203 sysfs_rw_n(temp, _status, offset, reg_status) \
204 sysfs_ro_n(temp, _input , offset, reg_act)
206 #define sysfs_in(offset, reg_act) \
207 sysfs_ro_n(in, _input, offset, reg_act)
209 #define sysfs_revision(reg_revision) \
210 sysfs_ro(revision, , reg_revision)
212 #define sysfs_alarms(reg_events) \
213 sysfs_ro(alarms, , reg_events)
215 #define sysfs_control(reg_control) \
216 sysfs_rw(control, , reg_control)
218 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
219 sysfs_rw(watchdog, _control, reg_control) \
220 sysfs_rw(watchdog, _status , reg_status) \
221 sysfs_rw(watchdog, _preset , reg_preset)
223 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
224 FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
225 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
226 FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
227 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
228 FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
230 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
231 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
232 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
234 sysfs_in(0, FSCHER_REG_VOLT_12)
235 sysfs_in(1, FSCHER_REG_VOLT_5)
236 sysfs_in(2, FSCHER_REG_VOLT_BATT)
238 sysfs_revision(FSCHER_REG_REVISION)
239 sysfs_alarms(FSCHER_REG_EVENTS)
240 sysfs_control(FSCHER_REG_CONTROL)
241 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
243 #define device_create_file_fan(client, offset) \
245 device_create_file(&client->dev, &dev_attr_fan##offset##_status); \
246 device_create_file(&client->dev, &dev_attr_pwm##offset); \
247 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
248 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
251 #define device_create_file_temp(client, offset) \
253 device_create_file(&client->dev, &dev_attr_temp##offset##_status); \
254 device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
257 #define device_create_file_in(client, offset) \
259 device_create_file(&client->dev, &dev_attr_in##offset##_input); \
262 #define device_create_file_revision(client) \
264 device_create_file(&client->dev, &dev_attr_revision); \
267 #define device_create_file_alarms(client) \
269 device_create_file(&client->dev, &dev_attr_alarms); \
272 #define device_create_file_control(client) \
274 device_create_file(&client->dev, &dev_attr_control); \
277 #define device_create_file_watchdog(client) \
279 device_create_file(&client->dev, &dev_attr_watchdog_status); \
280 device_create_file(&client->dev, &dev_attr_watchdog_control); \
281 device_create_file(&client->dev, &dev_attr_watchdog_preset); \
288 static int fscher_attach_adapter(struct i2c_adapter *adapter)
290 if (!(adapter->class & I2C_CLASS_HWMON))
292 return i2c_probe(adapter, &addr_data, fscher_detect);
295 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
297 struct i2c_client *new_client;
298 struct fscher_data *data;
301 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
304 /* OK. For now, we presume we have a valid client. We now create the
305 * client structure, even though we cannot fill it completely yet.
306 * But it allows us to access i2c_smbus_read_byte_data. */
307 if (!(data = kmalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
311 memset(data, 0, sizeof(struct fscher_data));
313 /* The common I2C client data is placed right before the
314 * Hermes-specific data. */
315 new_client = &data->client;
316 i2c_set_clientdata(new_client, data);
317 new_client->addr = address;
318 new_client->adapter = adapter;
319 new_client->driver = &fscher_driver;
320 new_client->flags = 0;
322 /* Do the remaining detection unless force or force_fscher parameter */
324 if ((i2c_smbus_read_byte_data(new_client,
325 FSCHER_REG_IDENT_0) != 0x48) /* 'H' */
326 || (i2c_smbus_read_byte_data(new_client,
327 FSCHER_REG_IDENT_1) != 0x45) /* 'E' */
328 || (i2c_smbus_read_byte_data(new_client,
329 FSCHER_REG_IDENT_2) != 0x52)) /* 'R' */
333 /* Fill in the remaining client fields and put it into the
335 strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
337 init_MUTEX(&data->update_lock);
339 /* Tell the I2C layer a new client has arrived */
340 if ((err = i2c_attach_client(new_client)))
343 fscher_init_client(new_client);
345 /* Register sysfs hooks */
346 data->class_dev = hwmon_device_register(&new_client->dev);
347 if (IS_ERR(data->class_dev)) {
348 err = PTR_ERR(data->class_dev);
352 device_create_file_revision(new_client);
353 device_create_file_alarms(new_client);
354 device_create_file_control(new_client);
355 device_create_file_watchdog(new_client);
357 device_create_file_in(new_client, 0);
358 device_create_file_in(new_client, 1);
359 device_create_file_in(new_client, 2);
361 device_create_file_fan(new_client, 1);
362 device_create_file_fan(new_client, 2);
363 device_create_file_fan(new_client, 3);
365 device_create_file_temp(new_client, 1);
366 device_create_file_temp(new_client, 2);
367 device_create_file_temp(new_client, 3);
372 i2c_detach_client(new_client);
379 static int fscher_detach_client(struct i2c_client *client)
381 struct fscher_data *data = i2c_get_clientdata(client);
384 hwmon_device_unregister(data->class_dev);
386 if ((err = i2c_detach_client(client)))
393 static int fscher_read_value(struct i2c_client *client, u8 reg)
395 dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
397 return i2c_smbus_read_byte_data(client, reg);
400 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
402 dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
405 return i2c_smbus_write_byte_data(client, reg, value);
408 /* Called when we have found a new FSC Hermes. */
409 static void fscher_init_client(struct i2c_client *client)
411 struct fscher_data *data = i2c_get_clientdata(client);
413 /* Read revision from chip */
414 data->revision = fscher_read_value(client, FSCHER_REG_REVISION);
417 static struct fscher_data *fscher_update_device(struct device *dev)
419 struct i2c_client *client = to_i2c_client(dev);
420 struct fscher_data *data = i2c_get_clientdata(client);
422 down(&data->update_lock);
424 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
426 dev_dbg(&client->dev, "Starting fscher update\n");
428 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
429 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
430 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
431 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
432 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
433 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
435 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
436 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
437 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
439 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
440 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
441 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
442 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
443 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
444 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
445 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
446 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
447 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
448 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
449 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
450 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
452 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
453 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
454 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
456 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
458 data->last_updated = jiffies;
462 up(&data->update_lock);
469 #define FAN_INDEX_FROM_NUM(nr) ((nr) - 1)
471 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
472 const char *buf, size_t count, int nr, int reg)
474 /* bits 0..1, 3..7 reserved => mask with 0x04 */
475 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
477 down(&data->update_lock);
478 data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
479 fscher_write_value(client, reg, v);
480 up(&data->update_lock);
484 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
486 /* bits 0..1, 3..7 reserved => mask with 0x04 */
487 return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
490 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
491 const char *buf, size_t count, int nr, int reg)
493 unsigned long v = simple_strtoul(buf, NULL, 10);
495 down(&data->update_lock);
496 data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
497 fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
498 up(&data->update_lock);
502 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
504 return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
507 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
508 const char *buf, size_t count, int nr, int reg)
510 /* supported values: 2, 4, 8 */
511 unsigned long v = simple_strtoul(buf, NULL, 10);
514 case 2: v = 1; break;
515 case 4: v = 2; break;
516 case 8: v = 3; break;
518 dev_err(&client->dev, "fan_div value %ld not "
519 "supported. Choose one of 2, 4 or 8!\n", v);
523 down(&data->update_lock);
525 /* bits 2..7 reserved => mask with 0x03 */
526 data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
527 data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
529 fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
530 up(&data->update_lock);
534 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
536 /* bits 2..7 reserved => mask with 0x03 */
537 return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
540 #define RPM_FROM_REG(val) (val*60)
542 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
544 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
549 #define TEMP_INDEX_FROM_NUM(nr) ((nr) - 1)
551 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
552 const char *buf, size_t count, int nr, int reg)
554 /* bits 2..7 reserved, 0 read only => mask with 0x02 */
555 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
557 down(&data->update_lock);
558 data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
559 fscher_write_value(client, reg, v);
560 up(&data->update_lock);
564 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
566 /* bits 2..7 reserved => mask with 0x03 */
567 return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
570 #define TEMP_FROM_REG(val) (((val) - 128) * 1000)
572 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
574 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
578 * The final conversion is specified in sensors.conf, as it depends on
579 * mainboard specific values. We export the registers contents as
580 * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
581 * sense per se, but it minimizes the conversions count and keeps the
582 * values within a usual range.
584 #define VOLT_FROM_REG(val) ((val) * 10)
586 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
588 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
593 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
595 return sprintf(buf, "%u\n", data->revision);
600 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
602 /* bits 2, 5..6 reserved => mask with 0x9b */
603 return sprintf(buf, "%u\n", data->global_event & 0x9b);
608 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
609 const char *buf, size_t count, int nr, int reg)
611 /* bits 1..7 reserved => mask with 0x01 */
612 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
614 down(&data->update_lock);
615 data->global_control &= ~v;
616 fscher_write_value(client, reg, v);
617 up(&data->update_lock);
621 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
623 /* bits 1..7 reserved => mask with 0x01 */
624 return sprintf(buf, "%u\n", data->global_control & 0x01);
629 static ssize_t set_watchdog_control(struct i2c_client *client, struct
630 fscher_data *data, const char *buf, size_t count,
633 /* bits 0..3 reserved => mask with 0xf0 */
634 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
636 down(&data->update_lock);
637 data->watchdog[2] &= ~0xf0;
638 data->watchdog[2] |= v;
639 fscher_write_value(client, reg, data->watchdog[2]);
640 up(&data->update_lock);
644 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
646 /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
647 return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
650 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
651 const char *buf, size_t count, int nr, int reg)
653 /* bits 0, 2..7 reserved => mask with 0x02 */
654 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
656 down(&data->update_lock);
657 data->watchdog[1] &= ~v;
658 fscher_write_value(client, reg, v);
659 up(&data->update_lock);
663 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
665 /* bits 0, 2..7 reserved => mask with 0x02 */
666 return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
669 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
670 const char *buf, size_t count, int nr, int reg)
672 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
674 down(&data->update_lock);
675 data->watchdog[0] = v;
676 fscher_write_value(client, reg, data->watchdog[0]);
677 up(&data->update_lock);
681 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
683 return sprintf(buf, "%u\n", data->watchdog[0]);
686 static int __init sensors_fscher_init(void)
688 return i2c_add_driver(&fscher_driver);
691 static void __exit sensors_fscher_exit(void)
693 i2c_del_driver(&fscher_driver);
696 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
697 MODULE_DESCRIPTION("FSC Hermes driver");
698 MODULE_LICENSE("GPL");
700 module_init(sensors_fscher_init);
701 module_exit(sensors_fscher_exit);