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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/module.h>
32 #include <linux/slab.h>
33 #include <linux/ioport.h>
34 #include <linux/jiffies.h>
35 #include <linux/platform_device.h>
36 #include <linux/hwmon.h>
37 #include <linux/hwmon-sysfs.h>
38 #include <linux/err.h>
39 #include <linux/init.h>
40 #include <linux/mutex.h>
41 #include <linux/sysfs.h>
42 #include <linux/acpi.h>
45 static unsigned short force_id;
46 module_param(force_id, ushort, 0);
47 MODULE_PARM_DESC(force_id, "Override the detected device ID");
49 static struct platform_device *pdev;
51 #define DRVNAME "smsc47m1"
52 enum chips { smsc47m1, smsc47m2 };
54 /* Super-I/0 registers and commands */
56 #define REG 0x2e /* The register to read/write */
57 #define VAL 0x2f /* The value to read/write */
60 superio_outb(int reg, int val)
73 /* logical device for fans is 0x0A */
74 #define superio_select() superio_outb(0x07, 0x0A)
88 #define SUPERIO_REG_ACT 0x30
89 #define SUPERIO_REG_BASE 0x60
90 #define SUPERIO_REG_DEVID 0x20
91 #define SUPERIO_REG_DEVREV 0x21
93 /* Logical device registers */
95 #define SMSC_EXTENT 0x80
97 /* nr is 0 or 1 in the macros below */
98 #define SMSC47M1_REG_ALARM 0x04
99 #define SMSC47M1_REG_TPIN(nr) (0x34 - (nr))
100 #define SMSC47M1_REG_PPIN(nr) (0x36 - (nr))
101 #define SMSC47M1_REG_FANDIV 0x58
103 static const u8 SMSC47M1_REG_FAN[3] = { 0x59, 0x5a, 0x6b };
104 static const u8 SMSC47M1_REG_FAN_PRELOAD[3] = { 0x5b, 0x5c, 0x6c };
105 static const u8 SMSC47M1_REG_PWM[3] = { 0x56, 0x57, 0x69 };
107 #define SMSC47M2_REG_ALARM6 0x09
108 #define SMSC47M2_REG_TPIN1 0x38
109 #define SMSC47M2_REG_TPIN2 0x37
110 #define SMSC47M2_REG_TPIN3 0x2d
111 #define SMSC47M2_REG_PPIN3 0x2c
112 #define SMSC47M2_REG_FANDIV3 0x6a
114 #define MIN_FROM_REG(reg, div) ((reg) >= 192 ? 0 : \
115 983040 / ((192 - (reg)) * (div)))
116 #define FAN_FROM_REG(reg, div, preload) ((reg) <= (preload) || (reg) == 255 ? \
118 983040 / (((reg) - (preload)) * (div)))
119 #define DIV_FROM_REG(reg) (1 << (reg))
120 #define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1)
121 #define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01)
122 #define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E)
124 struct smsc47m1_data {
128 struct device *hwmon_dev;
130 struct mutex update_lock;
131 unsigned long last_updated; /* In jiffies */
133 u8 fan[3]; /* Register value */
134 u8 fan_preload[3]; /* Register value */
135 u8 fan_div[3]; /* Register encoding, shifted right */
136 u8 alarms; /* Register encoding */
137 u8 pwm[3]; /* Register value (bit 0 is disable) */
140 struct smsc47m1_sio_data {
142 u8 activate; /* Remember initial device state */
146 static int __exit smsc47m1_remove(struct platform_device *pdev);
147 static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
150 static inline int smsc47m1_read_value(struct smsc47m1_data *data, u8 reg)
152 return inb_p(data->addr + reg);
155 static inline void smsc47m1_write_value(struct smsc47m1_data *data, u8 reg,
158 outb_p(value, data->addr + reg);
161 static struct platform_driver smsc47m1_driver = {
163 .owner = THIS_MODULE,
166 .remove = __exit_p(smsc47m1_remove),
169 static ssize_t get_fan(struct device *dev, struct device_attribute
172 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
173 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
174 int nr = attr->index;
176 * This chip (stupidly) stops monitoring fan speed if PWM is
177 * enabled and duty cycle is 0%. This is fine if the monitoring
178 * and control concern the same fan, but troublesome if they are
179 * not (which could as well happen).
181 int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 :
182 FAN_FROM_REG(data->fan[nr],
183 DIV_FROM_REG(data->fan_div[nr]),
184 data->fan_preload[nr]);
185 return sprintf(buf, "%d\n", rpm);
188 static ssize_t get_fan_min(struct device *dev, struct device_attribute
191 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
192 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
193 int nr = attr->index;
194 int rpm = MIN_FROM_REG(data->fan_preload[nr],
195 DIV_FROM_REG(data->fan_div[nr]));
196 return sprintf(buf, "%d\n", rpm);
199 static ssize_t get_fan_div(struct device *dev, struct device_attribute
202 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
203 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
204 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
207 static ssize_t get_fan_alarm(struct device *dev, struct device_attribute
210 int bitnr = to_sensor_dev_attr(devattr)->index;
211 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
212 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
215 static ssize_t get_pwm(struct device *dev, struct device_attribute
218 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
219 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
220 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[attr->index]));
223 static ssize_t get_pwm_en(struct device *dev, struct device_attribute
226 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
227 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
228 return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[attr->index]));
231 static ssize_t get_alarms(struct device *dev, struct device_attribute
234 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
235 return sprintf(buf, "%d\n", data->alarms);
238 static ssize_t set_fan_min(struct device *dev, struct device_attribute
239 *devattr, const char *buf, size_t count)
241 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
242 struct smsc47m1_data *data = dev_get_drvdata(dev);
243 int nr = attr->index;
248 err = kstrtol(buf, 10, &val);
252 mutex_lock(&data->update_lock);
253 rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]);
255 if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) {
256 mutex_unlock(&data->update_lock);
260 data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv);
261 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
262 data->fan_preload[nr]);
263 mutex_unlock(&data->update_lock);
269 * Note: we save and restore the fan minimum here, because its value is
270 * determined in part by the fan clock divider. This follows the principle
271 * of least surprise; the user doesn't expect the fan minimum to change just
272 * because the divider changed.
274 static ssize_t set_fan_div(struct device *dev, struct device_attribute
275 *devattr, const char *buf, size_t count)
277 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
278 struct smsc47m1_data *data = dev_get_drvdata(dev);
279 int nr = attr->index;
283 u8 old_div = DIV_FROM_REG(data->fan_div[nr]);
285 err = kstrtol(buf, 10, &new_div);
289 if (new_div == old_div) /* No change */
292 mutex_lock(&data->update_lock);
295 data->fan_div[nr] = 0;
298 data->fan_div[nr] = 1;
301 data->fan_div[nr] = 2;
304 data->fan_div[nr] = 3;
307 mutex_unlock(&data->update_lock);
314 tmp = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV)
315 & ~(0x03 << (4 + 2 * nr));
316 tmp |= data->fan_div[nr] << (4 + 2 * nr);
317 smsc47m1_write_value(data, SMSC47M1_REG_FANDIV, tmp);
320 tmp = smsc47m1_read_value(data, SMSC47M2_REG_FANDIV3) & 0xCF;
321 tmp |= data->fan_div[2] << 4;
322 smsc47m1_write_value(data, SMSC47M2_REG_FANDIV3, tmp);
326 /* Preserve fan min */
327 tmp = 192 - (old_div * (192 - data->fan_preload[nr])
328 + new_div / 2) / new_div;
329 data->fan_preload[nr] = clamp_val(tmp, 0, 191);
330 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
331 data->fan_preload[nr]);
332 mutex_unlock(&data->update_lock);
337 static ssize_t set_pwm(struct device *dev, struct device_attribute
338 *devattr, const char *buf, size_t count)
340 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
341 struct smsc47m1_data *data = dev_get_drvdata(dev);
342 int nr = attr->index;
346 err = kstrtol(buf, 10, &val);
350 if (val < 0 || val > 255)
353 mutex_lock(&data->update_lock);
354 data->pwm[nr] &= 0x81; /* Preserve additional bits */
355 data->pwm[nr] |= PWM_TO_REG(val);
356 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
358 mutex_unlock(&data->update_lock);
363 static ssize_t set_pwm_en(struct device *dev, struct device_attribute
364 *devattr, const char *buf, size_t count)
366 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
367 struct smsc47m1_data *data = dev_get_drvdata(dev);
368 int nr = attr->index;
372 err = kstrtoul(buf, 10, &val);
379 mutex_lock(&data->update_lock);
380 data->pwm[nr] &= 0xFE; /* preserve the other bits */
381 data->pwm[nr] |= !val;
382 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
384 mutex_unlock(&data->update_lock);
389 #define fan_present(offset) \
390 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, get_fan, \
392 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
393 get_fan_min, set_fan_min, offset - 1); \
394 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
395 get_fan_div, set_fan_div, offset - 1); \
396 static SENSOR_DEVICE_ATTR(fan##offset##_alarm, S_IRUGO, get_fan_alarm, \
398 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
399 get_pwm, set_pwm, offset - 1); \
400 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
401 get_pwm_en, set_pwm_en, offset - 1)
407 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
409 static ssize_t show_name(struct device *dev, struct device_attribute
412 struct smsc47m1_data *data = dev_get_drvdata(dev);
414 return sprintf(buf, "%s\n", data->name);
416 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
418 static struct attribute *smsc47m1_attributes_fan1[] = {
419 &sensor_dev_attr_fan1_input.dev_attr.attr,
420 &sensor_dev_attr_fan1_min.dev_attr.attr,
421 &sensor_dev_attr_fan1_div.dev_attr.attr,
422 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
426 static const struct attribute_group smsc47m1_group_fan1 = {
427 .attrs = smsc47m1_attributes_fan1,
430 static struct attribute *smsc47m1_attributes_fan2[] = {
431 &sensor_dev_attr_fan2_input.dev_attr.attr,
432 &sensor_dev_attr_fan2_min.dev_attr.attr,
433 &sensor_dev_attr_fan2_div.dev_attr.attr,
434 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
438 static const struct attribute_group smsc47m1_group_fan2 = {
439 .attrs = smsc47m1_attributes_fan2,
442 static struct attribute *smsc47m1_attributes_fan3[] = {
443 &sensor_dev_attr_fan3_input.dev_attr.attr,
444 &sensor_dev_attr_fan3_min.dev_attr.attr,
445 &sensor_dev_attr_fan3_div.dev_attr.attr,
446 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
450 static const struct attribute_group smsc47m1_group_fan3 = {
451 .attrs = smsc47m1_attributes_fan3,
454 static struct attribute *smsc47m1_attributes_pwm1[] = {
455 &sensor_dev_attr_pwm1.dev_attr.attr,
456 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
460 static const struct attribute_group smsc47m1_group_pwm1 = {
461 .attrs = smsc47m1_attributes_pwm1,
464 static struct attribute *smsc47m1_attributes_pwm2[] = {
465 &sensor_dev_attr_pwm2.dev_attr.attr,
466 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
470 static const struct attribute_group smsc47m1_group_pwm2 = {
471 .attrs = smsc47m1_attributes_pwm2,
474 static struct attribute *smsc47m1_attributes_pwm3[] = {
475 &sensor_dev_attr_pwm3.dev_attr.attr,
476 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
480 static const struct attribute_group smsc47m1_group_pwm3 = {
481 .attrs = smsc47m1_attributes_pwm3,
484 static struct attribute *smsc47m1_attributes[] = {
485 &dev_attr_alarms.attr,
490 static const struct attribute_group smsc47m1_group = {
491 .attrs = smsc47m1_attributes,
494 static int __init smsc47m1_find(struct smsc47m1_sio_data *sio_data)
500 val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
503 * SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x
504 * (device id 0x5F) and LPC47B27x (device id 0x51) have fan control.
505 * The LPC47M15x and LPC47M192 chips "with hardware monitoring block"
506 * can do much more besides (device id 0x60).
507 * The LPC47M997 is undocumented, but seems to be compatible with
508 * the LPC47M192, and has the same device id.
509 * The LPC47M292 (device id 0x6B) is somewhat compatible, but it
510 * supports a 3rd fan, and the pin configuration registers are
511 * unfortunately different.
512 * The LPC47M233 has the same device id (0x6B) but is not compatible.
513 * We check the high bit of the device revision register to
514 * differentiate them.
518 pr_info("Found SMSC LPC47B27x\n");
519 sio_data->type = smsc47m1;
522 pr_info("Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n");
523 sio_data->type = smsc47m1;
526 pr_info("Found SMSC LPC47M14x\n");
527 sio_data->type = smsc47m1;
530 pr_info("Found SMSC LPC47M15x/LPC47M192/LPC47M997\n");
531 sio_data->type = smsc47m1;
534 if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) {
535 pr_debug("Found SMSC LPC47M233, unsupported\n");
540 pr_info("Found SMSC LPC47M292\n");
541 sio_data->type = smsc47m2;
549 addr = (superio_inb(SUPERIO_REG_BASE) << 8)
550 | superio_inb(SUPERIO_REG_BASE + 1);
552 pr_info("Device address not set, will not use\n");
558 * Enable only if address is set (needed at least on the
559 * Compaq Presario S4000NX)
561 sio_data->activate = superio_inb(SUPERIO_REG_ACT);
562 if ((sio_data->activate & 0x01) == 0) {
563 pr_info("Enabling device\n");
564 superio_outb(SUPERIO_REG_ACT, sio_data->activate | 0x01);
571 /* Restore device to its initial state */
572 static void smsc47m1_restore(const struct smsc47m1_sio_data *sio_data)
574 if ((sio_data->activate & 0x01) == 0) {
578 pr_info("Disabling device\n");
579 superio_outb(SUPERIO_REG_ACT, sio_data->activate);
589 * This function can be used to:
590 * - test for resource conflicts with ACPI
591 * - request the resources
592 * We only allocate the I/O ports we really need, to minimize the risk of
593 * conflicts with ACPI or with other drivers.
595 static int __init smsc47m1_handle_resources(unsigned short address,
596 enum chips type, int action,
599 static const u8 ports_m1[] = {
600 /* register, region length */
606 static const u8 ports_m2[] = {
607 /* register, region length */
616 int i, ports_size, err;
623 ports_size = ARRAY_SIZE(ports_m1);
627 ports_size = ARRAY_SIZE(ports_m2);
631 for (i = 0; i + 1 < ports_size; i += 2) {
632 unsigned short start = address + ports[i];
633 unsigned short len = ports[i + 1];
637 /* Only check for conflicts */
638 err = acpi_check_region(start, len, DRVNAME);
643 /* Request the resources */
644 if (!devm_request_region(dev, start, len, DRVNAME)) {
646 "Region 0x%hx-0x%hx already in use!\n",
657 static void smsc47m1_remove_files(struct device *dev)
659 sysfs_remove_group(&dev->kobj, &smsc47m1_group);
660 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan1);
661 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan2);
662 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan3);
663 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm1);
664 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm2);
665 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm3);
668 static int __init smsc47m1_probe(struct platform_device *pdev)
670 struct device *dev = &pdev->dev;
671 struct smsc47m1_sio_data *sio_data = dev_get_platdata(dev);
672 struct smsc47m1_data *data;
673 struct resource *res;
675 int fan1, fan2, fan3, pwm1, pwm2, pwm3;
677 static const char * const names[] = {
682 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
683 err = smsc47m1_handle_resources(res->start, sio_data->type,
688 data = devm_kzalloc(dev, sizeof(struct smsc47m1_data), GFP_KERNEL);
692 data->addr = res->start;
693 data->type = sio_data->type;
694 data->name = names[sio_data->type];
695 mutex_init(&data->update_lock);
696 platform_set_drvdata(pdev, data);
699 * If no function is properly configured, there's no point in
700 * actually registering the chip.
702 pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05)
704 pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05)
706 if (data->type == smsc47m2) {
707 fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1)
709 fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2)
711 fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3)
713 pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3)
716 fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0))
718 fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1))
723 if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) {
724 dev_warn(dev, "Device not configured, will not use\n");
729 * Some values (fan min, clock dividers, pwm registers) may be
730 * needed before any update is triggered, so we better read them
731 * at least once here. We don't usually do it that way, but in
732 * this particular case, manually reading 5 registers out of 8
733 * doesn't make much sense and we're better using the existing
736 smsc47m1_update_device(dev, 1);
738 /* Register sysfs hooks */
740 err = sysfs_create_group(&dev->kobj,
741 &smsc47m1_group_fan1);
743 goto error_remove_files;
745 dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n");
748 err = sysfs_create_group(&dev->kobj,
749 &smsc47m1_group_fan2);
751 goto error_remove_files;
753 dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n");
756 err = sysfs_create_group(&dev->kobj,
757 &smsc47m1_group_fan3);
759 goto error_remove_files;
760 } else if (data->type == smsc47m2)
761 dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n");
764 err = sysfs_create_group(&dev->kobj,
765 &smsc47m1_group_pwm1);
767 goto error_remove_files;
769 dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n");
772 err = sysfs_create_group(&dev->kobj,
773 &smsc47m1_group_pwm2);
775 goto error_remove_files;
777 dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n");
780 err = sysfs_create_group(&dev->kobj,
781 &smsc47m1_group_pwm3);
783 goto error_remove_files;
784 } else if (data->type == smsc47m2)
785 dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n");
787 err = sysfs_create_group(&dev->kobj, &smsc47m1_group);
789 goto error_remove_files;
791 data->hwmon_dev = hwmon_device_register(dev);
792 if (IS_ERR(data->hwmon_dev)) {
793 err = PTR_ERR(data->hwmon_dev);
794 goto error_remove_files;
800 smsc47m1_remove_files(dev);
804 static int __exit smsc47m1_remove(struct platform_device *pdev)
806 struct smsc47m1_data *data = platform_get_drvdata(pdev);
808 hwmon_device_unregister(data->hwmon_dev);
809 smsc47m1_remove_files(&pdev->dev);
814 static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
817 struct smsc47m1_data *data = dev_get_drvdata(dev);
819 mutex_lock(&data->update_lock);
821 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) {
823 fan_nr = data->type == smsc47m2 ? 3 : 2;
825 for (i = 0; i < fan_nr; i++) {
826 data->fan[i] = smsc47m1_read_value(data,
827 SMSC47M1_REG_FAN[i]);
828 data->fan_preload[i] = smsc47m1_read_value(data,
829 SMSC47M1_REG_FAN_PRELOAD[i]);
830 data->pwm[i] = smsc47m1_read_value(data,
831 SMSC47M1_REG_PWM[i]);
834 i = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV);
835 data->fan_div[0] = (i >> 4) & 0x03;
836 data->fan_div[1] = i >> 6;
838 data->alarms = smsc47m1_read_value(data,
839 SMSC47M1_REG_ALARM) >> 6;
840 /* Clear alarms if needed */
842 smsc47m1_write_value(data, SMSC47M1_REG_ALARM, 0xC0);
845 data->fan_div[2] = (smsc47m1_read_value(data,
846 SMSC47M2_REG_FANDIV3) >> 4) & 0x03;
847 data->alarms |= (smsc47m1_read_value(data,
848 SMSC47M2_REG_ALARM6) & 0x40) >> 4;
849 /* Clear alarm if needed */
850 if (data->alarms & 0x04)
851 smsc47m1_write_value(data,
856 data->last_updated = jiffies;
859 mutex_unlock(&data->update_lock);
863 static int __init smsc47m1_device_add(unsigned short address,
864 const struct smsc47m1_sio_data *sio_data)
866 struct resource res = {
868 .end = address + SMSC_EXTENT - 1,
870 .flags = IORESOURCE_IO,
874 err = smsc47m1_handle_resources(address, sio_data->type, CHECK, NULL);
878 pdev = platform_device_alloc(DRVNAME, address);
881 pr_err("Device allocation failed\n");
885 err = platform_device_add_resources(pdev, &res, 1);
887 pr_err("Device resource addition failed (%d)\n", err);
888 goto exit_device_put;
891 err = platform_device_add_data(pdev, sio_data,
892 sizeof(struct smsc47m1_sio_data));
894 pr_err("Platform data allocation failed\n");
895 goto exit_device_put;
898 err = platform_device_add(pdev);
900 pr_err("Device addition failed (%d)\n", err);
901 goto exit_device_put;
907 platform_device_put(pdev);
912 static int __init sm_smsc47m1_init(void)
915 unsigned short address;
916 struct smsc47m1_sio_data sio_data;
918 err = smsc47m1_find(&sio_data);
923 /* Sets global pdev as a side effect */
924 err = smsc47m1_device_add(address, &sio_data);
928 err = platform_driver_probe(&smsc47m1_driver, smsc47m1_probe);
935 platform_device_unregister(pdev);
936 smsc47m1_restore(&sio_data);
940 static void __exit sm_smsc47m1_exit(void)
942 platform_driver_unregister(&smsc47m1_driver);
943 smsc47m1_restore(dev_get_platdata(&pdev->dev));
944 platform_device_unregister(pdev);
947 MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>");
948 MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver");
949 MODULE_LICENSE("GPL");
951 module_init(sm_smsc47m1_init);
952 module_exit(sm_smsc47m1_exit);