1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * smsc47m1.c - Part of lm_sensors, Linux kernel modules
4 * for hardware monitoring
6 * Supports the SMSC LPC47B27x, LPC47M10x, LPC47M112, LPC47M13x,
7 * LPC47M14x, LPC47M15x, LPC47M192, LPC47M292 and LPC47M997
10 * Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
11 * Copyright (C) 2004-2007 Jean Delvare <jdelvare@suse.de>
12 * Ported to Linux 2.6 by Gabriele Gorla <gorlik@yahoo.com>
16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/ioport.h>
21 #include <linux/jiffies.h>
22 #include <linux/platform_device.h>
23 #include <linux/hwmon.h>
24 #include <linux/hwmon-sysfs.h>
25 #include <linux/err.h>
26 #include <linux/init.h>
27 #include <linux/mutex.h>
28 #include <linux/sysfs.h>
29 #include <linux/acpi.h>
32 static unsigned short force_id;
33 module_param(force_id, ushort, 0);
34 MODULE_PARM_DESC(force_id, "Override the detected device ID");
36 static struct platform_device *pdev;
38 #define DRVNAME "smsc47m1"
39 enum chips { smsc47m1, smsc47m2 };
41 /* Super-I/0 registers and commands */
43 #define REG 0x2e /* The register to read/write */
44 #define VAL 0x2f /* The value to read/write */
47 superio_outb(int reg, int val)
60 /* logical device for fans is 0x0A */
61 #define superio_select() superio_outb(0x07, 0x0A)
66 if (!request_muxed_region(REG, 2, DRVNAME))
77 release_region(REG, 2);
80 #define SUPERIO_REG_ACT 0x30
81 #define SUPERIO_REG_BASE 0x60
82 #define SUPERIO_REG_DEVID 0x20
83 #define SUPERIO_REG_DEVREV 0x21
85 /* Logical device registers */
87 #define SMSC_EXTENT 0x80
89 /* nr is 0 or 1 in the macros below */
90 #define SMSC47M1_REG_ALARM 0x04
91 #define SMSC47M1_REG_TPIN(nr) (0x34 - (nr))
92 #define SMSC47M1_REG_PPIN(nr) (0x36 - (nr))
93 #define SMSC47M1_REG_FANDIV 0x58
95 static const u8 SMSC47M1_REG_FAN[3] = { 0x59, 0x5a, 0x6b };
96 static const u8 SMSC47M1_REG_FAN_PRELOAD[3] = { 0x5b, 0x5c, 0x6c };
97 static const u8 SMSC47M1_REG_PWM[3] = { 0x56, 0x57, 0x69 };
99 #define SMSC47M2_REG_ALARM6 0x09
100 #define SMSC47M2_REG_TPIN1 0x38
101 #define SMSC47M2_REG_TPIN2 0x37
102 #define SMSC47M2_REG_TPIN3 0x2d
103 #define SMSC47M2_REG_PPIN3 0x2c
104 #define SMSC47M2_REG_FANDIV3 0x6a
106 #define MIN_FROM_REG(reg, div) ((reg) >= 192 ? 0 : \
107 983040 / ((192 - (reg)) * (div)))
108 #define FAN_FROM_REG(reg, div, preload) ((reg) <= (preload) || (reg) == 255 ? \
110 983040 / (((reg) - (preload)) * (div)))
111 #define DIV_FROM_REG(reg) (1 << (reg))
112 #define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1)
113 #define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01)
114 #define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E)
116 struct smsc47m1_data {
120 struct device *hwmon_dev;
122 struct mutex update_lock;
123 unsigned long last_updated; /* In jiffies */
125 u8 fan[3]; /* Register value */
126 u8 fan_preload[3]; /* Register value */
127 u8 fan_div[3]; /* Register encoding, shifted right */
128 u8 alarms; /* Register encoding */
129 u8 pwm[3]; /* Register value (bit 0 is disable) */
132 struct smsc47m1_sio_data {
134 u8 activate; /* Remember initial device state */
137 static inline int smsc47m1_read_value(struct smsc47m1_data *data, u8 reg)
139 return inb_p(data->addr + reg);
142 static inline void smsc47m1_write_value(struct smsc47m1_data *data, u8 reg,
145 outb_p(value, data->addr + reg);
148 static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
151 struct smsc47m1_data *data = dev_get_drvdata(dev);
153 mutex_lock(&data->update_lock);
155 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) {
157 fan_nr = data->type == smsc47m2 ? 3 : 2;
159 for (i = 0; i < fan_nr; i++) {
160 data->fan[i] = smsc47m1_read_value(data,
161 SMSC47M1_REG_FAN[i]);
162 data->fan_preload[i] = smsc47m1_read_value(data,
163 SMSC47M1_REG_FAN_PRELOAD[i]);
164 data->pwm[i] = smsc47m1_read_value(data,
165 SMSC47M1_REG_PWM[i]);
168 i = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV);
169 data->fan_div[0] = (i >> 4) & 0x03;
170 data->fan_div[1] = i >> 6;
172 data->alarms = smsc47m1_read_value(data,
173 SMSC47M1_REG_ALARM) >> 6;
174 /* Clear alarms if needed */
176 smsc47m1_write_value(data, SMSC47M1_REG_ALARM, 0xC0);
179 data->fan_div[2] = (smsc47m1_read_value(data,
180 SMSC47M2_REG_FANDIV3) >> 4) & 0x03;
181 data->alarms |= (smsc47m1_read_value(data,
182 SMSC47M2_REG_ALARM6) & 0x40) >> 4;
183 /* Clear alarm if needed */
184 if (data->alarms & 0x04)
185 smsc47m1_write_value(data,
190 data->last_updated = jiffies;
193 mutex_unlock(&data->update_lock);
197 static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
200 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
201 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
202 int nr = attr->index;
204 * This chip (stupidly) stops monitoring fan speed if PWM is
205 * enabled and duty cycle is 0%. This is fine if the monitoring
206 * and control concern the same fan, but troublesome if they are
207 * not (which could as well happen).
209 int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 :
210 FAN_FROM_REG(data->fan[nr],
211 DIV_FROM_REG(data->fan_div[nr]),
212 data->fan_preload[nr]);
213 return sprintf(buf, "%d\n", rpm);
216 static ssize_t fan_min_show(struct device *dev,
217 struct device_attribute *devattr, char *buf)
219 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
220 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
221 int nr = attr->index;
222 int rpm = MIN_FROM_REG(data->fan_preload[nr],
223 DIV_FROM_REG(data->fan_div[nr]));
224 return sprintf(buf, "%d\n", rpm);
227 static ssize_t fan_div_show(struct device *dev,
228 struct device_attribute *devattr, char *buf)
230 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
231 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
232 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
235 static ssize_t fan_alarm_show(struct device *dev,
236 struct device_attribute *devattr, char *buf)
238 int bitnr = to_sensor_dev_attr(devattr)->index;
239 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
240 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
243 static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
246 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
247 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
248 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[attr->index]));
251 static ssize_t pwm_en_show(struct device *dev,
252 struct device_attribute *devattr, char *buf)
254 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
255 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
256 return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[attr->index]));
259 static ssize_t alarms_show(struct device *dev,
260 struct device_attribute *devattr, char *buf)
262 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
263 return sprintf(buf, "%d\n", data->alarms);
266 static ssize_t fan_min_store(struct device *dev,
267 struct device_attribute *devattr,
268 const char *buf, size_t count)
270 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
271 struct smsc47m1_data *data = dev_get_drvdata(dev);
272 int nr = attr->index;
277 err = kstrtol(buf, 10, &val);
281 mutex_lock(&data->update_lock);
282 rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]);
284 if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) {
285 mutex_unlock(&data->update_lock);
289 data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv);
290 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
291 data->fan_preload[nr]);
292 mutex_unlock(&data->update_lock);
298 * Note: we save and restore the fan minimum here, because its value is
299 * determined in part by the fan clock divider. This follows the principle
300 * of least surprise; the user doesn't expect the fan minimum to change just
301 * because the divider changed.
303 static ssize_t fan_div_store(struct device *dev,
304 struct device_attribute *devattr,
305 const char *buf, size_t count)
307 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
308 struct smsc47m1_data *data = dev_get_drvdata(dev);
309 int nr = attr->index;
313 u8 old_div = DIV_FROM_REG(data->fan_div[nr]);
315 err = kstrtol(buf, 10, &new_div);
319 if (new_div == old_div) /* No change */
322 mutex_lock(&data->update_lock);
325 data->fan_div[nr] = 0;
328 data->fan_div[nr] = 1;
331 data->fan_div[nr] = 2;
334 data->fan_div[nr] = 3;
337 mutex_unlock(&data->update_lock);
344 tmp = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV)
345 & ~(0x03 << (4 + 2 * nr));
346 tmp |= data->fan_div[nr] << (4 + 2 * nr);
347 smsc47m1_write_value(data, SMSC47M1_REG_FANDIV, tmp);
350 tmp = smsc47m1_read_value(data, SMSC47M2_REG_FANDIV3) & 0xCF;
351 tmp |= data->fan_div[2] << 4;
352 smsc47m1_write_value(data, SMSC47M2_REG_FANDIV3, tmp);
356 /* Preserve fan min */
357 tmp = 192 - (old_div * (192 - data->fan_preload[nr])
358 + new_div / 2) / new_div;
359 data->fan_preload[nr] = clamp_val(tmp, 0, 191);
360 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
361 data->fan_preload[nr]);
362 mutex_unlock(&data->update_lock);
367 static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
368 const char *buf, size_t count)
370 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
371 struct smsc47m1_data *data = dev_get_drvdata(dev);
372 int nr = attr->index;
376 err = kstrtol(buf, 10, &val);
380 if (val < 0 || val > 255)
383 mutex_lock(&data->update_lock);
384 data->pwm[nr] &= 0x81; /* Preserve additional bits */
385 data->pwm[nr] |= PWM_TO_REG(val);
386 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
388 mutex_unlock(&data->update_lock);
393 static ssize_t pwm_en_store(struct device *dev,
394 struct device_attribute *devattr, const char *buf,
397 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
398 struct smsc47m1_data *data = dev_get_drvdata(dev);
399 int nr = attr->index;
403 err = kstrtoul(buf, 10, &val);
410 mutex_lock(&data->update_lock);
411 data->pwm[nr] &= 0xFE; /* preserve the other bits */
412 data->pwm[nr] |= !val;
413 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
415 mutex_unlock(&data->update_lock);
420 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
421 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
422 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
423 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, fan_alarm, 0);
424 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
425 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_en, 0);
426 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
427 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
428 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
429 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, fan_alarm, 1);
430 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
431 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_en, 1);
432 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
433 static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
434 static SENSOR_DEVICE_ATTR_RW(fan3_div, fan_div, 2);
435 static SENSOR_DEVICE_ATTR_RO(fan3_alarm, fan_alarm, 2);
436 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
437 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_en, 2);
439 static DEVICE_ATTR_RO(alarms);
441 static ssize_t name_show(struct device *dev, struct device_attribute
444 struct smsc47m1_data *data = dev_get_drvdata(dev);
446 return sprintf(buf, "%s\n", data->name);
448 static DEVICE_ATTR_RO(name);
450 static struct attribute *smsc47m1_attributes_fan1[] = {
451 &sensor_dev_attr_fan1_input.dev_attr.attr,
452 &sensor_dev_attr_fan1_min.dev_attr.attr,
453 &sensor_dev_attr_fan1_div.dev_attr.attr,
454 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
458 static const struct attribute_group smsc47m1_group_fan1 = {
459 .attrs = smsc47m1_attributes_fan1,
462 static struct attribute *smsc47m1_attributes_fan2[] = {
463 &sensor_dev_attr_fan2_input.dev_attr.attr,
464 &sensor_dev_attr_fan2_min.dev_attr.attr,
465 &sensor_dev_attr_fan2_div.dev_attr.attr,
466 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
470 static const struct attribute_group smsc47m1_group_fan2 = {
471 .attrs = smsc47m1_attributes_fan2,
474 static struct attribute *smsc47m1_attributes_fan3[] = {
475 &sensor_dev_attr_fan3_input.dev_attr.attr,
476 &sensor_dev_attr_fan3_min.dev_attr.attr,
477 &sensor_dev_attr_fan3_div.dev_attr.attr,
478 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
482 static const struct attribute_group smsc47m1_group_fan3 = {
483 .attrs = smsc47m1_attributes_fan3,
486 static struct attribute *smsc47m1_attributes_pwm1[] = {
487 &sensor_dev_attr_pwm1.dev_attr.attr,
488 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
492 static const struct attribute_group smsc47m1_group_pwm1 = {
493 .attrs = smsc47m1_attributes_pwm1,
496 static struct attribute *smsc47m1_attributes_pwm2[] = {
497 &sensor_dev_attr_pwm2.dev_attr.attr,
498 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
502 static const struct attribute_group smsc47m1_group_pwm2 = {
503 .attrs = smsc47m1_attributes_pwm2,
506 static struct attribute *smsc47m1_attributes_pwm3[] = {
507 &sensor_dev_attr_pwm3.dev_attr.attr,
508 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
512 static const struct attribute_group smsc47m1_group_pwm3 = {
513 .attrs = smsc47m1_attributes_pwm3,
516 static struct attribute *smsc47m1_attributes[] = {
517 &dev_attr_alarms.attr,
522 static const struct attribute_group smsc47m1_group = {
523 .attrs = smsc47m1_attributes,
526 static int __init smsc47m1_find(struct smsc47m1_sio_data *sio_data)
532 err = superio_enter();
536 val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
539 * SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x
540 * (device id 0x5F) and LPC47B27x (device id 0x51) have fan control.
541 * The LPC47M15x and LPC47M192 chips "with hardware monitoring block"
542 * can do much more besides (device id 0x60).
543 * The LPC47M997 is undocumented, but seems to be compatible with
544 * the LPC47M192, and has the same device id.
545 * The LPC47M292 (device id 0x6B) is somewhat compatible, but it
546 * supports a 3rd fan, and the pin configuration registers are
547 * unfortunately different.
548 * The LPC47M233 has the same device id (0x6B) but is not compatible.
549 * We check the high bit of the device revision register to
550 * differentiate them.
554 pr_info("Found SMSC LPC47B27x\n");
555 sio_data->type = smsc47m1;
558 pr_info("Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n");
559 sio_data->type = smsc47m1;
562 pr_info("Found SMSC LPC47M14x\n");
563 sio_data->type = smsc47m1;
566 pr_info("Found SMSC LPC47M15x/LPC47M192/LPC47M997\n");
567 sio_data->type = smsc47m1;
570 if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) {
571 pr_debug("Found SMSC LPC47M233, unsupported\n");
576 pr_info("Found SMSC LPC47M292\n");
577 sio_data->type = smsc47m2;
585 addr = (superio_inb(SUPERIO_REG_BASE) << 8)
586 | superio_inb(SUPERIO_REG_BASE + 1);
588 pr_info("Device address not set, will not use\n");
594 * Enable only if address is set (needed at least on the
595 * Compaq Presario S4000NX)
597 sio_data->activate = superio_inb(SUPERIO_REG_ACT);
598 if ((sio_data->activate & 0x01) == 0) {
599 pr_info("Enabling device\n");
600 superio_outb(SUPERIO_REG_ACT, sio_data->activate | 0x01);
607 /* Restore device to its initial state */
608 static void smsc47m1_restore(const struct smsc47m1_sio_data *sio_data)
610 if ((sio_data->activate & 0x01) == 0) {
611 if (!superio_enter()) {
613 pr_info("Disabling device\n");
614 superio_outb(SUPERIO_REG_ACT, sio_data->activate);
617 pr_warn("Failed to disable device\n");
626 * This function can be used to:
627 * - test for resource conflicts with ACPI
628 * - request the resources
629 * We only allocate the I/O ports we really need, to minimize the risk of
630 * conflicts with ACPI or with other drivers.
632 static int __init smsc47m1_handle_resources(unsigned short address,
633 enum chips type, int action,
636 static const u8 ports_m1[] = {
637 /* register, region length */
643 static const u8 ports_m2[] = {
644 /* register, region length */
653 int i, ports_size, err;
660 ports_size = ARRAY_SIZE(ports_m1);
664 ports_size = ARRAY_SIZE(ports_m2);
668 for (i = 0; i + 1 < ports_size; i += 2) {
669 unsigned short start = address + ports[i];
670 unsigned short len = ports[i + 1];
674 /* Only check for conflicts */
675 err = acpi_check_region(start, len, DRVNAME);
680 /* Request the resources */
681 if (!devm_request_region(dev, start, len, DRVNAME)) {
683 "Region 0x%hx-0x%hx already in use!\n",
694 static void smsc47m1_remove_files(struct device *dev)
696 sysfs_remove_group(&dev->kobj, &smsc47m1_group);
697 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan1);
698 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan2);
699 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan3);
700 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm1);
701 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm2);
702 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm3);
705 static int __init smsc47m1_probe(struct platform_device *pdev)
707 struct device *dev = &pdev->dev;
708 struct smsc47m1_sio_data *sio_data = dev_get_platdata(dev);
709 struct smsc47m1_data *data;
710 struct resource *res;
712 int fan1, fan2, fan3, pwm1, pwm2, pwm3;
714 static const char * const names[] = {
719 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
720 err = smsc47m1_handle_resources(res->start, sio_data->type,
725 data = devm_kzalloc(dev, sizeof(struct smsc47m1_data), GFP_KERNEL);
729 data->addr = res->start;
730 data->type = sio_data->type;
731 data->name = names[sio_data->type];
732 mutex_init(&data->update_lock);
733 platform_set_drvdata(pdev, data);
736 * If no function is properly configured, there's no point in
737 * actually registering the chip.
739 pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05)
741 pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05)
743 if (data->type == smsc47m2) {
744 fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1)
746 fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2)
748 fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3)
750 pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3)
753 fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0))
755 fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1))
760 if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) {
761 dev_warn(dev, "Device not configured, will not use\n");
766 * Some values (fan min, clock dividers, pwm registers) may be
767 * needed before any update is triggered, so we better read them
768 * at least once here. We don't usually do it that way, but in
769 * this particular case, manually reading 5 registers out of 8
770 * doesn't make much sense and we're better using the existing
773 smsc47m1_update_device(dev, 1);
775 /* Register sysfs hooks */
777 err = sysfs_create_group(&dev->kobj,
778 &smsc47m1_group_fan1);
780 goto error_remove_files;
782 dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n");
785 err = sysfs_create_group(&dev->kobj,
786 &smsc47m1_group_fan2);
788 goto error_remove_files;
790 dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n");
793 err = sysfs_create_group(&dev->kobj,
794 &smsc47m1_group_fan3);
796 goto error_remove_files;
797 } else if (data->type == smsc47m2)
798 dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n");
801 err = sysfs_create_group(&dev->kobj,
802 &smsc47m1_group_pwm1);
804 goto error_remove_files;
806 dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n");
809 err = sysfs_create_group(&dev->kobj,
810 &smsc47m1_group_pwm2);
812 goto error_remove_files;
814 dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n");
817 err = sysfs_create_group(&dev->kobj,
818 &smsc47m1_group_pwm3);
820 goto error_remove_files;
821 } else if (data->type == smsc47m2)
822 dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n");
824 err = sysfs_create_group(&dev->kobj, &smsc47m1_group);
826 goto error_remove_files;
828 data->hwmon_dev = hwmon_device_register(dev);
829 if (IS_ERR(data->hwmon_dev)) {
830 err = PTR_ERR(data->hwmon_dev);
831 goto error_remove_files;
837 smsc47m1_remove_files(dev);
841 static int __exit smsc47m1_remove(struct platform_device *pdev)
843 struct smsc47m1_data *data = platform_get_drvdata(pdev);
845 hwmon_device_unregister(data->hwmon_dev);
846 smsc47m1_remove_files(&pdev->dev);
851 static struct platform_driver smsc47m1_driver = {
855 .remove = __exit_p(smsc47m1_remove),
858 static int __init smsc47m1_device_add(unsigned short address,
859 const struct smsc47m1_sio_data *sio_data)
861 struct resource res = {
863 .end = address + SMSC_EXTENT - 1,
865 .flags = IORESOURCE_IO,
869 err = smsc47m1_handle_resources(address, sio_data->type, CHECK, NULL);
873 pdev = platform_device_alloc(DRVNAME, address);
876 pr_err("Device allocation failed\n");
880 err = platform_device_add_resources(pdev, &res, 1);
882 pr_err("Device resource addition failed (%d)\n", err);
883 goto exit_device_put;
886 err = platform_device_add_data(pdev, sio_data,
887 sizeof(struct smsc47m1_sio_data));
889 pr_err("Platform data allocation failed\n");
890 goto exit_device_put;
893 err = platform_device_add(pdev);
895 pr_err("Device addition failed (%d)\n", err);
896 goto exit_device_put;
902 platform_device_put(pdev);
907 static int __init sm_smsc47m1_init(void)
910 unsigned short address;
911 struct smsc47m1_sio_data sio_data;
913 err = smsc47m1_find(&sio_data);
918 /* Sets global pdev as a side effect */
919 err = smsc47m1_device_add(address, &sio_data);
923 err = platform_driver_probe(&smsc47m1_driver, smsc47m1_probe);
930 platform_device_unregister(pdev);
931 smsc47m1_restore(&sio_data);
935 static void __exit sm_smsc47m1_exit(void)
937 platform_driver_unregister(&smsc47m1_driver);
938 smsc47m1_restore(dev_get_platdata(&pdev->dev));
939 platform_device_unregister(pdev);
942 MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>");
943 MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver");
944 MODULE_LICENSE("GPL");
946 module_init(sm_smsc47m1_init);
947 module_exit(sm_smsc47m1_exit);