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);
358 /* Preserve fan min */
359 tmp = 192 - (old_div * (192 - data->fan_preload[nr])
360 + new_div / 2) / new_div;
361 data->fan_preload[nr] = clamp_val(tmp, 0, 191);
362 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
363 data->fan_preload[nr]);
364 mutex_unlock(&data->update_lock);
369 static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
370 const char *buf, size_t count)
372 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
373 struct smsc47m1_data *data = dev_get_drvdata(dev);
374 int nr = attr->index;
378 err = kstrtol(buf, 10, &val);
382 if (val < 0 || val > 255)
385 mutex_lock(&data->update_lock);
386 data->pwm[nr] &= 0x81; /* Preserve additional bits */
387 data->pwm[nr] |= PWM_TO_REG(val);
388 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
390 mutex_unlock(&data->update_lock);
395 static ssize_t pwm_en_store(struct device *dev,
396 struct device_attribute *devattr, const char *buf,
399 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
400 struct smsc47m1_data *data = dev_get_drvdata(dev);
401 int nr = attr->index;
405 err = kstrtoul(buf, 10, &val);
412 mutex_lock(&data->update_lock);
413 data->pwm[nr] &= 0xFE; /* preserve the other bits */
414 data->pwm[nr] |= !val;
415 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
417 mutex_unlock(&data->update_lock);
422 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
423 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
424 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
425 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, fan_alarm, 0);
426 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
427 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_en, 0);
428 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
429 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
430 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
431 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, fan_alarm, 1);
432 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
433 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_en, 1);
434 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
435 static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
436 static SENSOR_DEVICE_ATTR_RW(fan3_div, fan_div, 2);
437 static SENSOR_DEVICE_ATTR_RO(fan3_alarm, fan_alarm, 2);
438 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
439 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_en, 2);
441 static DEVICE_ATTR_RO(alarms);
443 static ssize_t name_show(struct device *dev, struct device_attribute
446 struct smsc47m1_data *data = dev_get_drvdata(dev);
448 return sprintf(buf, "%s\n", data->name);
450 static DEVICE_ATTR_RO(name);
452 static struct attribute *smsc47m1_attributes_fan1[] = {
453 &sensor_dev_attr_fan1_input.dev_attr.attr,
454 &sensor_dev_attr_fan1_min.dev_attr.attr,
455 &sensor_dev_attr_fan1_div.dev_attr.attr,
456 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
460 static const struct attribute_group smsc47m1_group_fan1 = {
461 .attrs = smsc47m1_attributes_fan1,
464 static struct attribute *smsc47m1_attributes_fan2[] = {
465 &sensor_dev_attr_fan2_input.dev_attr.attr,
466 &sensor_dev_attr_fan2_min.dev_attr.attr,
467 &sensor_dev_attr_fan2_div.dev_attr.attr,
468 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
472 static const struct attribute_group smsc47m1_group_fan2 = {
473 .attrs = smsc47m1_attributes_fan2,
476 static struct attribute *smsc47m1_attributes_fan3[] = {
477 &sensor_dev_attr_fan3_input.dev_attr.attr,
478 &sensor_dev_attr_fan3_min.dev_attr.attr,
479 &sensor_dev_attr_fan3_div.dev_attr.attr,
480 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
484 static const struct attribute_group smsc47m1_group_fan3 = {
485 .attrs = smsc47m1_attributes_fan3,
488 static struct attribute *smsc47m1_attributes_pwm1[] = {
489 &sensor_dev_attr_pwm1.dev_attr.attr,
490 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
494 static const struct attribute_group smsc47m1_group_pwm1 = {
495 .attrs = smsc47m1_attributes_pwm1,
498 static struct attribute *smsc47m1_attributes_pwm2[] = {
499 &sensor_dev_attr_pwm2.dev_attr.attr,
500 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
504 static const struct attribute_group smsc47m1_group_pwm2 = {
505 .attrs = smsc47m1_attributes_pwm2,
508 static struct attribute *smsc47m1_attributes_pwm3[] = {
509 &sensor_dev_attr_pwm3.dev_attr.attr,
510 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
514 static const struct attribute_group smsc47m1_group_pwm3 = {
515 .attrs = smsc47m1_attributes_pwm3,
518 static struct attribute *smsc47m1_attributes[] = {
519 &dev_attr_alarms.attr,
524 static const struct attribute_group smsc47m1_group = {
525 .attrs = smsc47m1_attributes,
528 static int __init smsc47m1_find(struct smsc47m1_sio_data *sio_data)
534 err = superio_enter();
538 val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
541 * SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x
542 * (device id 0x5F) and LPC47B27x (device id 0x51) have fan control.
543 * The LPC47M15x and LPC47M192 chips "with hardware monitoring block"
544 * can do much more besides (device id 0x60).
545 * The LPC47M997 is undocumented, but seems to be compatible with
546 * the LPC47M192, and has the same device id.
547 * The LPC47M292 (device id 0x6B) is somewhat compatible, but it
548 * supports a 3rd fan, and the pin configuration registers are
549 * unfortunately different.
550 * The LPC47M233 has the same device id (0x6B) but is not compatible.
551 * We check the high bit of the device revision register to
552 * differentiate them.
556 pr_info("Found SMSC LPC47B27x\n");
557 sio_data->type = smsc47m1;
560 pr_info("Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n");
561 sio_data->type = smsc47m1;
564 pr_info("Found SMSC LPC47M14x\n");
565 sio_data->type = smsc47m1;
568 pr_info("Found SMSC LPC47M15x/LPC47M192/LPC47M997\n");
569 sio_data->type = smsc47m1;
572 if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) {
573 pr_debug("Found SMSC LPC47M233, unsupported\n");
578 pr_info("Found SMSC LPC47M292\n");
579 sio_data->type = smsc47m2;
587 addr = (superio_inb(SUPERIO_REG_BASE) << 8)
588 | superio_inb(SUPERIO_REG_BASE + 1);
590 pr_info("Device address not set, will not use\n");
596 * Enable only if address is set (needed at least on the
597 * Compaq Presario S4000NX)
599 sio_data->activate = superio_inb(SUPERIO_REG_ACT);
600 if ((sio_data->activate & 0x01) == 0) {
601 pr_info("Enabling device\n");
602 superio_outb(SUPERIO_REG_ACT, sio_data->activate | 0x01);
609 /* Restore device to its initial state */
610 static void smsc47m1_restore(const struct smsc47m1_sio_data *sio_data)
612 if ((sio_data->activate & 0x01) == 0) {
613 if (!superio_enter()) {
615 pr_info("Disabling device\n");
616 superio_outb(SUPERIO_REG_ACT, sio_data->activate);
619 pr_warn("Failed to disable device\n");
628 * This function can be used to:
629 * - test for resource conflicts with ACPI
630 * - request the resources
631 * We only allocate the I/O ports we really need, to minimize the risk of
632 * conflicts with ACPI or with other drivers.
634 static int __init smsc47m1_handle_resources(unsigned short address,
635 enum chips type, int action,
638 static const u8 ports_m1[] = {
639 /* register, region length */
645 static const u8 ports_m2[] = {
646 /* register, region length */
655 int i, ports_size, err;
662 ports_size = ARRAY_SIZE(ports_m1);
666 ports_size = ARRAY_SIZE(ports_m2);
670 for (i = 0; i + 1 < ports_size; i += 2) {
671 unsigned short start = address + ports[i];
672 unsigned short len = ports[i + 1];
676 /* Only check for conflicts */
677 err = acpi_check_region(start, len, DRVNAME);
682 /* Request the resources */
683 if (!devm_request_region(dev, start, len, DRVNAME)) {
685 "Region 0x%x-0x%x already in use!\n",
696 static void smsc47m1_remove_files(struct device *dev)
698 sysfs_remove_group(&dev->kobj, &smsc47m1_group);
699 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan1);
700 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan2);
701 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan3);
702 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm1);
703 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm2);
704 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm3);
707 static int __init smsc47m1_probe(struct platform_device *pdev)
709 struct device *dev = &pdev->dev;
710 struct smsc47m1_sio_data *sio_data = dev_get_platdata(dev);
711 struct smsc47m1_data *data;
712 struct resource *res;
714 int fan1, fan2, fan3, pwm1, pwm2, pwm3;
716 static const char * const names[] = {
721 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
722 err = smsc47m1_handle_resources(res->start, sio_data->type,
727 data = devm_kzalloc(dev, sizeof(struct smsc47m1_data), GFP_KERNEL);
731 data->addr = res->start;
732 data->type = sio_data->type;
733 data->name = names[sio_data->type];
734 mutex_init(&data->update_lock);
735 platform_set_drvdata(pdev, data);
738 * If no function is properly configured, there's no point in
739 * actually registering the chip.
741 pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05)
743 pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05)
745 if (data->type == smsc47m2) {
746 fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1)
748 fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2)
750 fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3)
752 pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3)
755 fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0))
757 fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1))
762 if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) {
763 dev_warn(dev, "Device not configured, will not use\n");
768 * Some values (fan min, clock dividers, pwm registers) may be
769 * needed before any update is triggered, so we better read them
770 * at least once here. We don't usually do it that way, but in
771 * this particular case, manually reading 5 registers out of 8
772 * doesn't make much sense and we're better using the existing
775 smsc47m1_update_device(dev, 1);
777 /* Register sysfs hooks */
779 err = sysfs_create_group(&dev->kobj,
780 &smsc47m1_group_fan1);
782 goto error_remove_files;
784 dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n");
787 err = sysfs_create_group(&dev->kobj,
788 &smsc47m1_group_fan2);
790 goto error_remove_files;
792 dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n");
795 err = sysfs_create_group(&dev->kobj,
796 &smsc47m1_group_fan3);
798 goto error_remove_files;
799 } else if (data->type == smsc47m2)
800 dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n");
803 err = sysfs_create_group(&dev->kobj,
804 &smsc47m1_group_pwm1);
806 goto error_remove_files;
808 dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n");
811 err = sysfs_create_group(&dev->kobj,
812 &smsc47m1_group_pwm2);
814 goto error_remove_files;
816 dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n");
819 err = sysfs_create_group(&dev->kobj,
820 &smsc47m1_group_pwm3);
822 goto error_remove_files;
823 } else if (data->type == smsc47m2)
824 dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n");
826 err = sysfs_create_group(&dev->kobj, &smsc47m1_group);
828 goto error_remove_files;
830 data->hwmon_dev = hwmon_device_register(dev);
831 if (IS_ERR(data->hwmon_dev)) {
832 err = PTR_ERR(data->hwmon_dev);
833 goto error_remove_files;
839 smsc47m1_remove_files(dev);
843 static int __exit smsc47m1_remove(struct platform_device *pdev)
845 struct smsc47m1_data *data = platform_get_drvdata(pdev);
847 hwmon_device_unregister(data->hwmon_dev);
848 smsc47m1_remove_files(&pdev->dev);
853 static struct platform_driver smsc47m1_driver = {
857 .remove = __exit_p(smsc47m1_remove),
860 static int __init smsc47m1_device_add(unsigned short address,
861 const struct smsc47m1_sio_data *sio_data)
863 struct resource res = {
865 .end = address + SMSC_EXTENT - 1,
867 .flags = IORESOURCE_IO,
871 err = smsc47m1_handle_resources(address, sio_data->type, CHECK, NULL);
875 pdev = platform_device_alloc(DRVNAME, address);
878 pr_err("Device allocation failed\n");
882 err = platform_device_add_resources(pdev, &res, 1);
884 pr_err("Device resource addition failed (%d)\n", err);
885 goto exit_device_put;
888 err = platform_device_add_data(pdev, sio_data,
889 sizeof(struct smsc47m1_sio_data));
891 pr_err("Platform data allocation failed\n");
892 goto exit_device_put;
895 err = platform_device_add(pdev);
897 pr_err("Device addition failed (%d)\n", err);
898 goto exit_device_put;
904 platform_device_put(pdev);
909 static int __init sm_smsc47m1_init(void)
912 unsigned short address;
913 struct smsc47m1_sio_data sio_data;
915 err = smsc47m1_find(&sio_data);
920 /* Sets global pdev as a side effect */
921 err = smsc47m1_device_add(address, &sio_data);
925 err = platform_driver_probe(&smsc47m1_driver, smsc47m1_probe);
932 platform_device_unregister(pdev);
933 smsc47m1_restore(&sio_data);
937 static void __exit sm_smsc47m1_exit(void)
939 platform_driver_unregister(&smsc47m1_driver);
940 smsc47m1_restore(dev_get_platdata(&pdev->dev));
941 platform_device_unregister(pdev);
944 MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>");
945 MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver");
946 MODULE_LICENSE("GPL");
948 module_init(sm_smsc47m1_init);
949 module_exit(sm_smsc47m1_exit);