2 smsc47m1.c - Part of lm_sensors, Linux kernel modules
3 for hardware monitoring
5 Supports the SMSC LPC47B27x, LPC47M10x, LPC47M112, LPC47M13x,
6 LPC47M14x, LPC47M15x, LPC47M192, LPC47M292 and LPC47M997
9 Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
10 Copyright (C) 2004-2007 Jean Delvare <khali@linux-fr.org>
11 Ported to Linux 2.6 by Gabriele Gorla <gorlik@yahoo.com>
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 2 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <linux/module.h>
30 #include <linux/slab.h>
31 #include <linux/ioport.h>
32 #include <linux/jiffies.h>
33 #include <linux/platform_device.h>
34 #include <linux/hwmon.h>
35 #include <linux/hwmon-sysfs.h>
36 #include <linux/err.h>
37 #include <linux/init.h>
38 #include <linux/mutex.h>
39 #include <linux/sysfs.h>
42 static unsigned short force_id;
43 module_param(force_id, ushort, 0);
44 MODULE_PARM_DESC(force_id, "Override the detected device ID");
46 static struct platform_device *pdev;
48 #define DRVNAME "smsc47m1"
49 enum chips { smsc47m1, smsc47m2 };
51 /* Super-I/0 registers and commands */
53 #define REG 0x2e /* The register to read/write */
54 #define VAL 0x2f /* The value to read/write */
57 superio_outb(int reg, int val)
70 /* logical device for fans is 0x0A */
71 #define superio_select() superio_outb(0x07, 0x0A)
85 #define SUPERIO_REG_ACT 0x30
86 #define SUPERIO_REG_BASE 0x60
87 #define SUPERIO_REG_DEVID 0x20
89 /* Logical device registers */
91 #define SMSC_EXTENT 0x80
93 /* nr is 0 or 1 in the macros below */
94 #define SMSC47M1_REG_ALARM 0x04
95 #define SMSC47M1_REG_TPIN(nr) (0x34 - (nr))
96 #define SMSC47M1_REG_PPIN(nr) (0x36 - (nr))
97 #define SMSC47M1_REG_FANDIV 0x58
99 static const u8 SMSC47M1_REG_FAN[3] = { 0x59, 0x5a, 0x6b };
100 static const u8 SMSC47M1_REG_FAN_PRELOAD[3] = { 0x5b, 0x5c, 0x6c };
101 static const u8 SMSC47M1_REG_PWM[3] = { 0x56, 0x57, 0x69 };
103 #define SMSC47M2_REG_ALARM6 0x09
104 #define SMSC47M2_REG_TPIN1 0x38
105 #define SMSC47M2_REG_TPIN2 0x37
106 #define SMSC47M2_REG_TPIN3 0x2d
107 #define SMSC47M2_REG_PPIN3 0x2c
108 #define SMSC47M2_REG_FANDIV3 0x6a
110 #define MIN_FROM_REG(reg,div) ((reg)>=192 ? 0 : \
111 983040/((192-(reg))*(div)))
112 #define FAN_FROM_REG(reg,div,preload) ((reg)<=(preload) || (reg)==255 ? 0 : \
113 983040/(((reg)-(preload))*(div)))
114 #define DIV_FROM_REG(reg) (1 << (reg))
115 #define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1)
116 #define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01)
117 #define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E)
119 struct smsc47m1_data {
123 struct device *hwmon_dev;
125 struct mutex update_lock;
126 unsigned long last_updated; /* In jiffies */
128 u8 fan[3]; /* Register value */
129 u8 fan_preload[3]; /* Register value */
130 u8 fan_div[3]; /* Register encoding, shifted right */
131 u8 alarms; /* Register encoding */
132 u8 pwm[3]; /* Register value (bit 0 is disable) */
135 struct smsc47m1_sio_data {
140 static int smsc47m1_probe(struct platform_device *pdev);
141 static int __devexit smsc47m1_remove(struct platform_device *pdev);
142 static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
145 static inline int smsc47m1_read_value(struct smsc47m1_data *data, u8 reg)
147 return inb_p(data->addr + reg);
150 static inline void smsc47m1_write_value(struct smsc47m1_data *data, u8 reg,
153 outb_p(value, data->addr + reg);
156 static struct platform_driver smsc47m1_driver = {
158 .owner = THIS_MODULE,
161 .probe = smsc47m1_probe,
162 .remove = __devexit_p(smsc47m1_remove),
165 static ssize_t get_fan(struct device *dev, struct device_attribute
168 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
169 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
170 int nr = attr->index;
171 /* This chip (stupidly) stops monitoring fan speed if PWM is
172 enabled and duty cycle is 0%. This is fine if the monitoring
173 and control concern the same fan, but troublesome if they are
174 not (which could as well happen). */
175 int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 :
176 FAN_FROM_REG(data->fan[nr],
177 DIV_FROM_REG(data->fan_div[nr]),
178 data->fan_preload[nr]);
179 return sprintf(buf, "%d\n", rpm);
182 static ssize_t get_fan_min(struct device *dev, struct device_attribute
185 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
186 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
187 int nr = attr->index;
188 int rpm = MIN_FROM_REG(data->fan_preload[nr],
189 DIV_FROM_REG(data->fan_div[nr]));
190 return sprintf(buf, "%d\n", rpm);
193 static ssize_t get_fan_div(struct device *dev, struct device_attribute
196 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
197 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
198 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
201 static ssize_t get_fan_alarm(struct device *dev, struct device_attribute
204 int bitnr = to_sensor_dev_attr(devattr)->index;
205 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
206 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
209 static ssize_t get_pwm(struct device *dev, struct device_attribute
212 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
213 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
214 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[attr->index]));
217 static ssize_t get_pwm_en(struct device *dev, struct device_attribute
220 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
221 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
222 return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[attr->index]));
225 static ssize_t get_alarms(struct device *dev, struct device_attribute
228 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
229 return sprintf(buf, "%d\n", data->alarms);
232 static ssize_t set_fan_min(struct device *dev, struct device_attribute
233 *devattr, const char *buf, size_t count)
235 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
236 struct smsc47m1_data *data = dev_get_drvdata(dev);
237 int nr = attr->index;
238 long rpmdiv, val = simple_strtol(buf, NULL, 10);
240 mutex_lock(&data->update_lock);
241 rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]);
243 if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) {
244 mutex_unlock(&data->update_lock);
248 data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv);
249 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
250 data->fan_preload[nr]);
251 mutex_unlock(&data->update_lock);
256 /* Note: we save and restore the fan minimum here, because its value is
257 determined in part by the fan clock divider. This follows the principle
258 of least surprise; the user doesn't expect the fan minimum to change just
259 because the divider changed. */
260 static ssize_t set_fan_div(struct device *dev, struct device_attribute
261 *devattr, const char *buf, size_t count)
263 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
264 struct smsc47m1_data *data = dev_get_drvdata(dev);
265 int nr = attr->index;
266 long new_div = simple_strtol(buf, NULL, 10), tmp;
267 u8 old_div = DIV_FROM_REG(data->fan_div[nr]);
269 if (new_div == old_div) /* No change */
272 mutex_lock(&data->update_lock);
274 case 1: data->fan_div[nr] = 0; break;
275 case 2: data->fan_div[nr] = 1; break;
276 case 4: data->fan_div[nr] = 2; break;
277 case 8: data->fan_div[nr] = 3; break;
279 mutex_unlock(&data->update_lock);
286 tmp = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV)
287 & ~(0x03 << (4 + 2 * nr));
288 tmp |= data->fan_div[nr] << (4 + 2 * nr);
289 smsc47m1_write_value(data, SMSC47M1_REG_FANDIV, tmp);
292 tmp = smsc47m1_read_value(data, SMSC47M2_REG_FANDIV3) & 0xCF;
293 tmp |= data->fan_div[2] << 4;
294 smsc47m1_write_value(data, SMSC47M2_REG_FANDIV3, tmp);
298 /* Preserve fan min */
299 tmp = 192 - (old_div * (192 - data->fan_preload[nr])
300 + new_div / 2) / new_div;
301 data->fan_preload[nr] = SENSORS_LIMIT(tmp, 0, 191);
302 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
303 data->fan_preload[nr]);
304 mutex_unlock(&data->update_lock);
309 static ssize_t set_pwm(struct device *dev, struct device_attribute
310 *devattr, const char *buf, size_t count)
312 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
313 struct smsc47m1_data *data = dev_get_drvdata(dev);
314 int nr = attr->index;
315 long val = simple_strtol(buf, NULL, 10);
317 if (val < 0 || val > 255)
320 mutex_lock(&data->update_lock);
321 data->pwm[nr] &= 0x81; /* Preserve additional bits */
322 data->pwm[nr] |= PWM_TO_REG(val);
323 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
325 mutex_unlock(&data->update_lock);
330 static ssize_t set_pwm_en(struct device *dev, struct device_attribute
331 *devattr, const char *buf, size_t count)
333 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
334 struct smsc47m1_data *data = dev_get_drvdata(dev);
335 int nr = attr->index;
336 long val = simple_strtol(buf, NULL, 10);
338 if (val != 0 && val != 1)
341 mutex_lock(&data->update_lock);
342 data->pwm[nr] &= 0xFE; /* preserve the other bits */
343 data->pwm[nr] |= !val;
344 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
346 mutex_unlock(&data->update_lock);
351 #define fan_present(offset) \
352 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, get_fan, \
354 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
355 get_fan_min, set_fan_min, offset - 1); \
356 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
357 get_fan_div, set_fan_div, offset - 1); \
358 static SENSOR_DEVICE_ATTR(fan##offset##_alarm, S_IRUGO, get_fan_alarm, \
360 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
361 get_pwm, set_pwm, offset - 1); \
362 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
363 get_pwm_en, set_pwm_en, offset - 1)
369 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
371 static ssize_t show_name(struct device *dev, struct device_attribute
374 struct smsc47m1_data *data = dev_get_drvdata(dev);
376 return sprintf(buf, "%s\n", data->name);
378 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
380 /* Almost all sysfs files may or may not be created depending on the chip
381 setup so we create them individually. It is still convenient to define a
382 group to remove them all at once. */
383 static struct attribute *smsc47m1_attributes[] = {
384 &sensor_dev_attr_fan1_input.dev_attr.attr,
385 &sensor_dev_attr_fan1_min.dev_attr.attr,
386 &sensor_dev_attr_fan1_div.dev_attr.attr,
387 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
388 &sensor_dev_attr_fan2_input.dev_attr.attr,
389 &sensor_dev_attr_fan2_min.dev_attr.attr,
390 &sensor_dev_attr_fan2_div.dev_attr.attr,
391 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
392 &sensor_dev_attr_fan3_input.dev_attr.attr,
393 &sensor_dev_attr_fan3_min.dev_attr.attr,
394 &sensor_dev_attr_fan3_div.dev_attr.attr,
395 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
397 &sensor_dev_attr_pwm1.dev_attr.attr,
398 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
399 &sensor_dev_attr_pwm2.dev_attr.attr,
400 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
401 &sensor_dev_attr_pwm3.dev_attr.attr,
402 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
404 &dev_attr_alarms.attr,
409 static const struct attribute_group smsc47m1_group = {
410 .attrs = smsc47m1_attributes,
413 static int __init smsc47m1_find(unsigned short *addr,
414 struct smsc47m1_sio_data *sio_data)
419 val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
422 * SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x
423 * (device id 0x5F) and LPC47B27x (device id 0x51) have fan control.
424 * The LPC47M15x and LPC47M192 chips "with hardware monitoring block"
425 * can do much more besides (device id 0x60).
426 * The LPC47M997 is undocumented, but seems to be compatible with
427 * the LPC47M192, and has the same device id.
428 * The LPC47M292 (device id 0x6B) is somewhat compatible, but it
429 * supports a 3rd fan, and the pin configuration registers are
430 * unfortunately different.
434 pr_info(DRVNAME ": Found SMSC LPC47B27x\n");
435 sio_data->type = smsc47m1;
438 pr_info(DRVNAME ": Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n");
439 sio_data->type = smsc47m1;
442 pr_info(DRVNAME ": Found SMSC LPC47M14x\n");
443 sio_data->type = smsc47m1;
446 pr_info(DRVNAME ": Found SMSC LPC47M15x/LPC47M192/LPC47M997\n");
447 sio_data->type = smsc47m1;
450 pr_info(DRVNAME ": Found SMSC LPC47M292\n");
451 sio_data->type = smsc47m2;
459 *addr = (superio_inb(SUPERIO_REG_BASE) << 8)
460 | superio_inb(SUPERIO_REG_BASE + 1);
461 val = superio_inb(SUPERIO_REG_ACT);
462 if (*addr == 0 || (val & 0x01) == 0) {
463 pr_info(DRVNAME ": Device is disabled, will not use\n");
472 static int __devinit smsc47m1_probe(struct platform_device *pdev)
474 struct device *dev = &pdev->dev;
475 struct smsc47m1_sio_data *sio_data = dev->platform_data;
476 struct smsc47m1_data *data;
477 struct resource *res;
479 int fan1, fan2, fan3, pwm1, pwm2, pwm3;
481 static const char *names[] = {
486 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
487 if (!request_region(res->start, SMSC_EXTENT, DRVNAME)) {
488 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
489 (unsigned long)res->start,
490 (unsigned long)res->end);
494 if (!(data = kzalloc(sizeof(struct smsc47m1_data), GFP_KERNEL))) {
499 data->addr = res->start;
500 data->type = sio_data->type;
501 data->name = names[sio_data->type];
502 mutex_init(&data->update_lock);
503 platform_set_drvdata(pdev, data);
505 /* If no function is properly configured, there's no point in
506 actually registering the chip. */
507 pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05)
509 pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05)
511 if (data->type == smsc47m2) {
512 fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1)
514 fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2)
516 fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3)
518 pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3)
521 fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0))
523 fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1))
528 if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) {
529 dev_warn(dev, "Device not configured, will not use\n");
534 /* Some values (fan min, clock dividers, pwm registers) may be
535 needed before any update is triggered, so we better read them
536 at least once here. We don't usually do it that way, but in
537 this particular case, manually reading 5 registers out of 8
538 doesn't make much sense and we're better using the existing
540 smsc47m1_update_device(dev, 1);
542 /* Register sysfs hooks */
544 if ((err = device_create_file(dev,
545 &sensor_dev_attr_fan1_input.dev_attr))
546 || (err = device_create_file(dev,
547 &sensor_dev_attr_fan1_min.dev_attr))
548 || (err = device_create_file(dev,
549 &sensor_dev_attr_fan1_div.dev_attr))
550 || (err = device_create_file(dev,
551 &sensor_dev_attr_fan1_alarm.dev_attr)))
552 goto error_remove_files;
554 dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n");
557 if ((err = device_create_file(dev,
558 &sensor_dev_attr_fan2_input.dev_attr))
559 || (err = device_create_file(dev,
560 &sensor_dev_attr_fan2_min.dev_attr))
561 || (err = device_create_file(dev,
562 &sensor_dev_attr_fan2_div.dev_attr))
563 || (err = device_create_file(dev,
564 &sensor_dev_attr_fan2_alarm.dev_attr)))
565 goto error_remove_files;
567 dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n");
570 if ((err = device_create_file(dev,
571 &sensor_dev_attr_fan3_input.dev_attr))
572 || (err = device_create_file(dev,
573 &sensor_dev_attr_fan3_min.dev_attr))
574 || (err = device_create_file(dev,
575 &sensor_dev_attr_fan3_div.dev_attr))
576 || (err = device_create_file(dev,
577 &sensor_dev_attr_fan3_alarm.dev_attr)))
578 goto error_remove_files;
579 } else if (data->type == smsc47m2)
580 dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n");
583 if ((err = device_create_file(dev,
584 &sensor_dev_attr_pwm1.dev_attr))
585 || (err = device_create_file(dev,
586 &sensor_dev_attr_pwm1_enable.dev_attr)))
587 goto error_remove_files;
589 dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n");
592 if ((err = device_create_file(dev,
593 &sensor_dev_attr_pwm2.dev_attr))
594 || (err = device_create_file(dev,
595 &sensor_dev_attr_pwm2_enable.dev_attr)))
596 goto error_remove_files;
598 dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n");
601 if ((err = device_create_file(dev,
602 &sensor_dev_attr_pwm3.dev_attr))
603 || (err = device_create_file(dev,
604 &sensor_dev_attr_pwm3_enable.dev_attr)))
605 goto error_remove_files;
606 } else if (data->type == smsc47m2)
607 dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n");
609 if ((err = device_create_file(dev, &dev_attr_alarms)))
610 goto error_remove_files;
611 if ((err = device_create_file(dev, &dev_attr_name)))
612 goto error_remove_files;
614 data->hwmon_dev = hwmon_device_register(dev);
615 if (IS_ERR(data->hwmon_dev)) {
616 err = PTR_ERR(data->hwmon_dev);
617 goto error_remove_files;
623 sysfs_remove_group(&dev->kobj, &smsc47m1_group);
625 platform_set_drvdata(pdev, NULL);
628 release_region(res->start, SMSC_EXTENT);
632 static int __devexit smsc47m1_remove(struct platform_device *pdev)
634 struct smsc47m1_data *data = platform_get_drvdata(pdev);
635 struct resource *res;
637 hwmon_device_unregister(data->hwmon_dev);
638 sysfs_remove_group(&pdev->dev.kobj, &smsc47m1_group);
640 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
641 release_region(res->start, SMSC_EXTENT);
642 platform_set_drvdata(pdev, NULL);
648 static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
651 struct smsc47m1_data *data = dev_get_drvdata(dev);
653 mutex_lock(&data->update_lock);
655 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) {
657 fan_nr = data->type == smsc47m2 ? 3 : 2;
659 for (i = 0; i < fan_nr; i++) {
660 data->fan[i] = smsc47m1_read_value(data,
661 SMSC47M1_REG_FAN[i]);
662 data->fan_preload[i] = smsc47m1_read_value(data,
663 SMSC47M1_REG_FAN_PRELOAD[i]);
664 data->pwm[i] = smsc47m1_read_value(data,
665 SMSC47M1_REG_PWM[i]);
668 i = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV);
669 data->fan_div[0] = (i >> 4) & 0x03;
670 data->fan_div[1] = i >> 6;
672 data->alarms = smsc47m1_read_value(data,
673 SMSC47M1_REG_ALARM) >> 6;
674 /* Clear alarms if needed */
676 smsc47m1_write_value(data, SMSC47M1_REG_ALARM, 0xC0);
679 data->fan_div[2] = (smsc47m1_read_value(data,
680 SMSC47M2_REG_FANDIV3) >> 4) & 0x03;
681 data->alarms |= (smsc47m1_read_value(data,
682 SMSC47M2_REG_ALARM6) & 0x40) >> 4;
683 /* Clear alarm if needed */
684 if (data->alarms & 0x04)
685 smsc47m1_write_value(data,
690 data->last_updated = jiffies;
693 mutex_unlock(&data->update_lock);
697 static int __init smsc47m1_device_add(unsigned short address,
698 const struct smsc47m1_sio_data *sio_data)
700 struct resource res = {
702 .end = address + SMSC_EXTENT - 1,
704 .flags = IORESOURCE_IO,
708 pdev = platform_device_alloc(DRVNAME, address);
711 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
715 err = platform_device_add_resources(pdev, &res, 1);
717 printk(KERN_ERR DRVNAME ": Device resource addition failed "
719 goto exit_device_put;
722 err = platform_device_add_data(pdev, sio_data,
723 sizeof(struct smsc47m1_sio_data));
725 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
726 goto exit_device_put;
729 err = platform_device_add(pdev);
731 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
733 goto exit_device_put;
739 platform_device_put(pdev);
744 static int __init sm_smsc47m1_init(void)
747 unsigned short address;
748 struct smsc47m1_sio_data sio_data;
750 if (smsc47m1_find(&address, &sio_data))
753 err = platform_driver_register(&smsc47m1_driver);
757 /* Sets global pdev as a side effect */
758 err = smsc47m1_device_add(address, &sio_data);
765 platform_driver_unregister(&smsc47m1_driver);
770 static void __exit sm_smsc47m1_exit(void)
772 platform_device_unregister(pdev);
773 platform_driver_unregister(&smsc47m1_driver);
776 MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>");
777 MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver");
778 MODULE_LICENSE("GPL");
780 module_init(sm_smsc47m1_init);
781 module_exit(sm_smsc47m1_exit);