2 * Hardware monitoring driver for PMBus devices
4 * Copyright (c) 2010, 2011 Ericsson AB.
5 * Copyright (c) 2012 Guenter Roeck
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/err.h>
26 #include <linux/slab.h>
27 #include <linux/i2c.h>
28 #include <linux/hwmon.h>
29 #include <linux/hwmon-sysfs.h>
30 #include <linux/jiffies.h>
31 #include <linux/i2c/pmbus.h>
32 #include <linux/regulator/driver.h>
33 #include <linux/regulator/machine.h>
37 * Number of additional attribute pointers to allocate
38 * with each call to krealloc
40 #define PMBUS_ATTR_ALLOC_SIZE 32
43 * Index into status register array, per status register group
45 #define PB_STATUS_BASE 0
46 #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES)
47 #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES)
48 #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES)
49 #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES)
50 #define PB_STATUS_TEMP_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES)
51 #define PB_STATUS_INPUT_BASE (PB_STATUS_TEMP_BASE + PMBUS_PAGES)
52 #define PB_STATUS_VMON_BASE (PB_STATUS_INPUT_BASE + 1)
54 #define PB_NUM_STATUS_REG (PB_STATUS_VMON_BASE + 1)
56 #define PMBUS_NAME_SIZE 24
59 struct pmbus_sensor *next;
60 char name[PMBUS_NAME_SIZE]; /* sysfs sensor name */
61 struct device_attribute attribute;
62 u8 page; /* page number */
63 u16 reg; /* register */
64 enum pmbus_sensor_classes class; /* sensor class */
65 bool update; /* runtime sensor update needed */
66 int data; /* Sensor data.
67 Negative if there was a read error */
69 #define to_pmbus_sensor(_attr) \
70 container_of(_attr, struct pmbus_sensor, attribute)
72 struct pmbus_boolean {
73 char name[PMBUS_NAME_SIZE]; /* sysfs boolean name */
74 struct sensor_device_attribute attribute;
75 struct pmbus_sensor *s1;
76 struct pmbus_sensor *s2;
78 #define to_pmbus_boolean(_attr) \
79 container_of(_attr, struct pmbus_boolean, attribute)
82 char name[PMBUS_NAME_SIZE]; /* sysfs label name */
83 struct device_attribute attribute;
84 char label[PMBUS_NAME_SIZE]; /* label */
86 #define to_pmbus_label(_attr) \
87 container_of(_attr, struct pmbus_label, attribute)
91 struct device *hwmon_dev;
93 u32 flags; /* from platform data */
95 int exponent[PMBUS_PAGES];
96 /* linear mode: exponent for output voltages */
98 const struct pmbus_driver_info *info;
102 struct attribute_group group;
103 const struct attribute_group *groups[2];
105 struct pmbus_sensor *sensors;
107 struct mutex update_lock;
109 unsigned long last_updated; /* in jiffies */
112 * A single status register covers multiple attributes,
113 * so we keep them all together.
115 u8 status[PB_NUM_STATUS_REG];
121 void pmbus_clear_cache(struct i2c_client *client)
123 struct pmbus_data *data = i2c_get_clientdata(client);
127 EXPORT_SYMBOL_GPL(pmbus_clear_cache);
129 int pmbus_set_page(struct i2c_client *client, u8 page)
131 struct pmbus_data *data = i2c_get_clientdata(client);
135 if (page != data->currpage) {
136 rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
137 newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE);
141 data->currpage = page;
145 EXPORT_SYMBOL_GPL(pmbus_set_page);
147 int pmbus_write_byte(struct i2c_client *client, int page, u8 value)
152 rv = pmbus_set_page(client, page);
157 return i2c_smbus_write_byte(client, value);
159 EXPORT_SYMBOL_GPL(pmbus_write_byte);
162 * _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if
163 * a device specific mapping function exists and calls it if necessary.
165 static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value)
167 struct pmbus_data *data = i2c_get_clientdata(client);
168 const struct pmbus_driver_info *info = data->info;
171 if (info->write_byte) {
172 status = info->write_byte(client, page, value);
173 if (status != -ENODATA)
176 return pmbus_write_byte(client, page, value);
179 int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word)
183 rv = pmbus_set_page(client, page);
187 return i2c_smbus_write_word_data(client, reg, word);
189 EXPORT_SYMBOL_GPL(pmbus_write_word_data);
192 * _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if
193 * a device specific mapping function exists and calls it if necessary.
195 static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg,
198 struct pmbus_data *data = i2c_get_clientdata(client);
199 const struct pmbus_driver_info *info = data->info;
202 if (info->write_word_data) {
203 status = info->write_word_data(client, page, reg, word);
204 if (status != -ENODATA)
207 if (reg >= PMBUS_VIRT_BASE)
209 return pmbus_write_word_data(client, page, reg, word);
212 int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg)
216 rv = pmbus_set_page(client, page);
220 return i2c_smbus_read_word_data(client, reg);
222 EXPORT_SYMBOL_GPL(pmbus_read_word_data);
225 * _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if
226 * a device specific mapping function exists and calls it if necessary.
228 static int _pmbus_read_word_data(struct i2c_client *client, int page, int reg)
230 struct pmbus_data *data = i2c_get_clientdata(client);
231 const struct pmbus_driver_info *info = data->info;
234 if (info->read_word_data) {
235 status = info->read_word_data(client, page, reg);
236 if (status != -ENODATA)
239 if (reg >= PMBUS_VIRT_BASE)
241 return pmbus_read_word_data(client, page, reg);
244 int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg)
249 rv = pmbus_set_page(client, page);
254 return i2c_smbus_read_byte_data(client, reg);
256 EXPORT_SYMBOL_GPL(pmbus_read_byte_data);
258 int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg, u8 value)
262 rv = pmbus_set_page(client, page);
266 return i2c_smbus_write_byte_data(client, reg, value);
268 EXPORT_SYMBOL_GPL(pmbus_write_byte_data);
270 int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg,
276 rv = pmbus_read_byte_data(client, page, reg);
280 tmp = (rv & ~mask) | (value & mask);
283 rv = pmbus_write_byte_data(client, page, reg, tmp);
287 EXPORT_SYMBOL_GPL(pmbus_update_byte_data);
290 * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if
291 * a device specific mapping function exists and calls it if necessary.
293 static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg)
295 struct pmbus_data *data = i2c_get_clientdata(client);
296 const struct pmbus_driver_info *info = data->info;
299 if (info->read_byte_data) {
300 status = info->read_byte_data(client, page, reg);
301 if (status != -ENODATA)
304 return pmbus_read_byte_data(client, page, reg);
307 static void pmbus_clear_fault_page(struct i2c_client *client, int page)
309 _pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
312 void pmbus_clear_faults(struct i2c_client *client)
314 struct pmbus_data *data = i2c_get_clientdata(client);
317 for (i = 0; i < data->info->pages; i++)
318 pmbus_clear_fault_page(client, i);
320 EXPORT_SYMBOL_GPL(pmbus_clear_faults);
322 static int pmbus_check_status_cml(struct i2c_client *client)
324 struct pmbus_data *data = i2c_get_clientdata(client);
327 status = _pmbus_read_byte_data(client, -1, data->status_register);
328 if (status < 0 || (status & PB_STATUS_CML)) {
329 status2 = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML);
330 if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND))
336 static bool pmbus_check_register(struct i2c_client *client,
337 int (*func)(struct i2c_client *client,
342 struct pmbus_data *data = i2c_get_clientdata(client);
344 rv = func(client, page, reg);
345 if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK))
346 rv = pmbus_check_status_cml(client);
347 pmbus_clear_fault_page(client, -1);
351 bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg)
353 return pmbus_check_register(client, _pmbus_read_byte_data, page, reg);
355 EXPORT_SYMBOL_GPL(pmbus_check_byte_register);
357 bool pmbus_check_word_register(struct i2c_client *client, int page, int reg)
359 return pmbus_check_register(client, _pmbus_read_word_data, page, reg);
361 EXPORT_SYMBOL_GPL(pmbus_check_word_register);
363 const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client)
365 struct pmbus_data *data = i2c_get_clientdata(client);
369 EXPORT_SYMBOL_GPL(pmbus_get_driver_info);
371 static struct _pmbus_status {
376 { PMBUS_HAVE_STATUS_VOUT, PB_STATUS_VOUT_BASE, PMBUS_STATUS_VOUT },
377 { PMBUS_HAVE_STATUS_IOUT, PB_STATUS_IOUT_BASE, PMBUS_STATUS_IOUT },
378 { PMBUS_HAVE_STATUS_TEMP, PB_STATUS_TEMP_BASE,
379 PMBUS_STATUS_TEMPERATURE },
380 { PMBUS_HAVE_STATUS_FAN12, PB_STATUS_FAN_BASE, PMBUS_STATUS_FAN_12 },
381 { PMBUS_HAVE_STATUS_FAN34, PB_STATUS_FAN34_BASE, PMBUS_STATUS_FAN_34 },
384 static struct pmbus_data *pmbus_update_device(struct device *dev)
386 struct i2c_client *client = to_i2c_client(dev->parent);
387 struct pmbus_data *data = i2c_get_clientdata(client);
388 const struct pmbus_driver_info *info = data->info;
389 struct pmbus_sensor *sensor;
391 mutex_lock(&data->update_lock);
392 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
395 for (i = 0; i < info->pages; i++) {
396 data->status[PB_STATUS_BASE + i]
397 = _pmbus_read_byte_data(client, i,
398 data->status_register);
399 for (j = 0; j < ARRAY_SIZE(pmbus_status); j++) {
400 struct _pmbus_status *s = &pmbus_status[j];
402 if (!(info->func[i] & s->func))
404 data->status[s->base + i]
405 = _pmbus_read_byte_data(client, i,
410 if (info->func[0] & PMBUS_HAVE_STATUS_INPUT)
411 data->status[PB_STATUS_INPUT_BASE]
412 = _pmbus_read_byte_data(client, 0,
415 if (info->func[0] & PMBUS_HAVE_STATUS_VMON)
416 data->status[PB_STATUS_VMON_BASE]
417 = _pmbus_read_byte_data(client, 0,
418 PMBUS_VIRT_STATUS_VMON);
420 for (sensor = data->sensors; sensor; sensor = sensor->next) {
421 if (!data->valid || sensor->update)
423 = _pmbus_read_word_data(client,
427 pmbus_clear_faults(client);
428 data->last_updated = jiffies;
431 mutex_unlock(&data->update_lock);
436 * Convert linear sensor values to milli- or micro-units
437 * depending on sensor type.
439 static long pmbus_reg2data_linear(struct pmbus_data *data,
440 struct pmbus_sensor *sensor)
446 if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */
447 exponent = data->exponent[sensor->page];
448 mantissa = (u16) sensor->data;
449 } else { /* LINEAR11 */
450 exponent = ((s16)sensor->data) >> 11;
451 mantissa = ((s16)((sensor->data & 0x7ff) << 5)) >> 5;
456 /* scale result to milli-units for all sensors except fans */
457 if (sensor->class != PSC_FAN)
460 /* scale result to micro-units for power sensors */
461 if (sensor->class == PSC_POWER)
473 * Convert direct sensor values to milli- or micro-units
474 * depending on sensor type.
476 static long pmbus_reg2data_direct(struct pmbus_data *data,
477 struct pmbus_sensor *sensor)
479 long val = (s16) sensor->data;
482 m = data->info->m[sensor->class];
483 b = data->info->b[sensor->class];
484 R = data->info->R[sensor->class];
489 /* X = 1/m * (Y * 10^-R - b) */
491 /* scale result to milli-units for everything but fans */
492 if (sensor->class != PSC_FAN) {
497 /* scale result to micro-units for power sensors */
498 if (sensor->class == PSC_POWER) {
508 val = DIV_ROUND_CLOSEST(val, 10);
512 return (val - b) / m;
516 * Convert VID sensor values to milli- or micro-units
517 * depending on sensor type.
518 * We currently only support VR11.
520 static long pmbus_reg2data_vid(struct pmbus_data *data,
521 struct pmbus_sensor *sensor)
523 long val = sensor->data;
525 if (val < 0x02 || val > 0xb2)
527 return DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100);
530 static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)
534 switch (data->info->format[sensor->class]) {
536 val = pmbus_reg2data_direct(data, sensor);
539 val = pmbus_reg2data_vid(data, sensor);
543 val = pmbus_reg2data_linear(data, sensor);
549 #define MAX_MANTISSA (1023 * 1000)
550 #define MIN_MANTISSA (511 * 1000)
552 static u16 pmbus_data2reg_linear(struct pmbus_data *data,
553 struct pmbus_sensor *sensor, long val)
555 s16 exponent = 0, mantissa;
556 bool negative = false;
562 if (sensor->class == PSC_VOLTAGE_OUT) {
563 /* LINEAR16 does not support negative voltages */
568 * For a static exponents, we don't have a choice
569 * but to adjust the value to it.
571 if (data->exponent[sensor->page] < 0)
572 val <<= -data->exponent[sensor->page];
574 val >>= data->exponent[sensor->page];
575 val = DIV_ROUND_CLOSEST(val, 1000);
584 /* Power is in uW. Convert to mW before converting. */
585 if (sensor->class == PSC_POWER)
586 val = DIV_ROUND_CLOSEST(val, 1000L);
589 * For simplicity, convert fan data to milli-units
590 * before calculating the exponent.
592 if (sensor->class == PSC_FAN)
595 /* Reduce large mantissa until it fits into 10 bit */
596 while (val >= MAX_MANTISSA && exponent < 15) {
600 /* Increase small mantissa to improve precision */
601 while (val < MIN_MANTISSA && exponent > -15) {
606 /* Convert mantissa from milli-units to units */
607 mantissa = DIV_ROUND_CLOSEST(val, 1000);
609 /* Ensure that resulting number is within range */
610 if (mantissa > 0x3ff)
615 mantissa = -mantissa;
617 /* Convert to 5 bit exponent, 11 bit mantissa */
618 return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800);
621 static u16 pmbus_data2reg_direct(struct pmbus_data *data,
622 struct pmbus_sensor *sensor, long val)
626 m = data->info->m[sensor->class];
627 b = data->info->b[sensor->class];
628 R = data->info->R[sensor->class];
630 /* Power is in uW. Adjust R and b. */
631 if (sensor->class == PSC_POWER) {
636 /* Calculate Y = (m * X + b) * 10^R */
637 if (sensor->class != PSC_FAN) {
638 R -= 3; /* Adjust R and b for data in milli-units */
648 val = DIV_ROUND_CLOSEST(val, 10);
655 static u16 pmbus_data2reg_vid(struct pmbus_data *data,
656 struct pmbus_sensor *sensor, long val)
658 val = clamp_val(val, 500, 1600);
660 return 2 + DIV_ROUND_CLOSEST((1600 - val) * 100, 625);
663 static u16 pmbus_data2reg(struct pmbus_data *data,
664 struct pmbus_sensor *sensor, long val)
668 switch (data->info->format[sensor->class]) {
670 regval = pmbus_data2reg_direct(data, sensor, val);
673 regval = pmbus_data2reg_vid(data, sensor, val);
677 regval = pmbus_data2reg_linear(data, sensor, val);
684 * Return boolean calculated from converted data.
685 * <index> defines a status register index and mask.
686 * The mask is in the lower 8 bits, the register index is in bits 8..23.
688 * The associated pmbus_boolean structure contains optional pointers to two
689 * sensor attributes. If specified, those attributes are compared against each
690 * other to determine if a limit has been exceeded.
692 * If the sensor attribute pointers are NULL, the function returns true if
693 * (status[reg] & mask) is true.
695 * If sensor attribute pointers are provided, a comparison against a specified
696 * limit has to be performed to determine the boolean result.
697 * In this case, the function returns true if v1 >= v2 (where v1 and v2 are
698 * sensor values referenced by sensor attribute pointers s1 and s2).
700 * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>.
701 * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>.
703 * If a negative value is stored in any of the referenced registers, this value
704 * reflects an error code which will be returned.
706 static int pmbus_get_boolean(struct pmbus_data *data, struct pmbus_boolean *b,
709 struct pmbus_sensor *s1 = b->s1;
710 struct pmbus_sensor *s2 = b->s2;
711 u16 reg = (index >> 8) & 0xffff;
712 u8 mask = index & 0xff;
716 status = data->status[reg];
720 regval = status & mask;
723 } else if (!s1 || !s2) {
724 WARN(1, "Bad boolean descriptor %p: s1=%p, s2=%p\n", b, s1, s2);
734 v1 = pmbus_reg2data(data, s1);
735 v2 = pmbus_reg2data(data, s2);
736 ret = !!(regval && v1 >= v2);
741 static ssize_t pmbus_show_boolean(struct device *dev,
742 struct device_attribute *da, char *buf)
744 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
745 struct pmbus_boolean *boolean = to_pmbus_boolean(attr);
746 struct pmbus_data *data = pmbus_update_device(dev);
749 val = pmbus_get_boolean(data, boolean, attr->index);
752 return snprintf(buf, PAGE_SIZE, "%d\n", val);
755 static ssize_t pmbus_show_sensor(struct device *dev,
756 struct device_attribute *devattr, char *buf)
758 struct pmbus_data *data = pmbus_update_device(dev);
759 struct pmbus_sensor *sensor = to_pmbus_sensor(devattr);
761 if (sensor->data < 0)
764 return snprintf(buf, PAGE_SIZE, "%ld\n", pmbus_reg2data(data, sensor));
767 static ssize_t pmbus_set_sensor(struct device *dev,
768 struct device_attribute *devattr,
769 const char *buf, size_t count)
771 struct i2c_client *client = to_i2c_client(dev->parent);
772 struct pmbus_data *data = i2c_get_clientdata(client);
773 struct pmbus_sensor *sensor = to_pmbus_sensor(devattr);
779 if (kstrtol(buf, 10, &val) < 0)
782 mutex_lock(&data->update_lock);
783 regval = pmbus_data2reg(data, sensor, val);
784 ret = _pmbus_write_word_data(client, sensor->page, sensor->reg, regval);
788 sensor->data = regval;
789 mutex_unlock(&data->update_lock);
793 static ssize_t pmbus_show_label(struct device *dev,
794 struct device_attribute *da, char *buf)
796 struct pmbus_label *label = to_pmbus_label(da);
798 return snprintf(buf, PAGE_SIZE, "%s\n", label->label);
801 static int pmbus_add_attribute(struct pmbus_data *data, struct attribute *attr)
803 if (data->num_attributes >= data->max_attributes - 1) {
804 int new_max_attrs = data->max_attributes + PMBUS_ATTR_ALLOC_SIZE;
805 void *new_attrs = krealloc(data->group.attrs,
806 new_max_attrs * sizeof(void *),
810 data->group.attrs = new_attrs;
811 data->max_attributes = new_max_attrs;
814 data->group.attrs[data->num_attributes++] = attr;
815 data->group.attrs[data->num_attributes] = NULL;
819 static void pmbus_dev_attr_init(struct device_attribute *dev_attr,
822 ssize_t (*show)(struct device *dev,
823 struct device_attribute *attr,
825 ssize_t (*store)(struct device *dev,
826 struct device_attribute *attr,
827 const char *buf, size_t count))
829 sysfs_attr_init(&dev_attr->attr);
830 dev_attr->attr.name = name;
831 dev_attr->attr.mode = mode;
832 dev_attr->show = show;
833 dev_attr->store = store;
836 static void pmbus_attr_init(struct sensor_device_attribute *a,
839 ssize_t (*show)(struct device *dev,
840 struct device_attribute *attr,
842 ssize_t (*store)(struct device *dev,
843 struct device_attribute *attr,
844 const char *buf, size_t count),
847 pmbus_dev_attr_init(&a->dev_attr, name, mode, show, store);
851 static int pmbus_add_boolean(struct pmbus_data *data,
852 const char *name, const char *type, int seq,
853 struct pmbus_sensor *s1,
854 struct pmbus_sensor *s2,
857 struct pmbus_boolean *boolean;
858 struct sensor_device_attribute *a;
860 boolean = devm_kzalloc(data->dev, sizeof(*boolean), GFP_KERNEL);
864 a = &boolean->attribute;
866 snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s",
870 pmbus_attr_init(a, boolean->name, S_IRUGO, pmbus_show_boolean, NULL,
873 return pmbus_add_attribute(data, &a->dev_attr.attr);
876 static struct pmbus_sensor *pmbus_add_sensor(struct pmbus_data *data,
877 const char *name, const char *type,
878 int seq, int page, int reg,
879 enum pmbus_sensor_classes class,
880 bool update, bool readonly)
882 struct pmbus_sensor *sensor;
883 struct device_attribute *a;
885 sensor = devm_kzalloc(data->dev, sizeof(*sensor), GFP_KERNEL);
888 a = &sensor->attribute;
890 snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s",
894 sensor->class = class;
895 sensor->update = update;
896 pmbus_dev_attr_init(a, sensor->name,
897 readonly ? S_IRUGO : S_IRUGO | S_IWUSR,
898 pmbus_show_sensor, pmbus_set_sensor);
900 if (pmbus_add_attribute(data, &a->attr))
903 sensor->next = data->sensors;
904 data->sensors = sensor;
909 static int pmbus_add_label(struct pmbus_data *data,
910 const char *name, int seq,
911 const char *lstring, int index)
913 struct pmbus_label *label;
914 struct device_attribute *a;
916 label = devm_kzalloc(data->dev, sizeof(*label), GFP_KERNEL);
920 a = &label->attribute;
922 snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq);
924 strncpy(label->label, lstring, sizeof(label->label) - 1);
926 snprintf(label->label, sizeof(label->label), "%s%d", lstring,
929 pmbus_dev_attr_init(a, label->name, S_IRUGO, pmbus_show_label, NULL);
930 return pmbus_add_attribute(data, &a->attr);
934 * Search for attributes. Allocate sensors, booleans, and labels as needed.
938 * The pmbus_limit_attr structure describes a single limit attribute
939 * and its associated alarm attribute.
941 struct pmbus_limit_attr {
942 u16 reg; /* Limit register */
943 u16 sbit; /* Alarm attribute status bit */
944 bool update; /* True if register needs updates */
945 bool low; /* True if low limit; for limits with compare
947 const char *attr; /* Attribute name */
948 const char *alarm; /* Alarm attribute name */
952 * The pmbus_sensor_attr structure describes one sensor attribute. This
953 * description includes a reference to the associated limit attributes.
955 struct pmbus_sensor_attr {
956 u16 reg; /* sensor register */
957 u8 gbit; /* generic status bit */
958 u8 nlimit; /* # of limit registers */
959 enum pmbus_sensor_classes class;/* sensor class */
960 const char *label; /* sensor label */
961 bool paged; /* true if paged sensor */
962 bool update; /* true if update needed */
963 bool compare; /* true if compare function needed */
964 u32 func; /* sensor mask */
965 u32 sfunc; /* sensor status mask */
966 int sbase; /* status base register */
967 const struct pmbus_limit_attr *limit;/* limit registers */
971 * Add a set of limit attributes and, if supported, the associated
973 * returns 0 if no alarm register found, 1 if an alarm register was found,
976 static int pmbus_add_limit_attrs(struct i2c_client *client,
977 struct pmbus_data *data,
978 const struct pmbus_driver_info *info,
979 const char *name, int index, int page,
980 struct pmbus_sensor *base,
981 const struct pmbus_sensor_attr *attr)
983 const struct pmbus_limit_attr *l = attr->limit;
984 int nlimit = attr->nlimit;
987 struct pmbus_sensor *curr;
989 for (i = 0; i < nlimit; i++) {
990 if (pmbus_check_word_register(client, page, l->reg)) {
991 curr = pmbus_add_sensor(data, name, l->attr, index,
992 page, l->reg, attr->class,
993 attr->update || l->update,
997 if (l->sbit && (info->func[page] & attr->sfunc)) {
998 ret = pmbus_add_boolean(data, name,
1000 attr->compare ? l->low ? curr : base
1002 attr->compare ? l->low ? base : curr
1004 attr->sbase + page, l->sbit);
1015 static int pmbus_add_sensor_attrs_one(struct i2c_client *client,
1016 struct pmbus_data *data,
1017 const struct pmbus_driver_info *info,
1019 int index, int page,
1020 const struct pmbus_sensor_attr *attr)
1022 struct pmbus_sensor *base;
1026 ret = pmbus_add_label(data, name, index, attr->label,
1027 attr->paged ? page + 1 : 0);
1031 base = pmbus_add_sensor(data, name, "input", index, page, attr->reg,
1032 attr->class, true, true);
1036 ret = pmbus_add_limit_attrs(client, data, info, name,
1037 index, page, base, attr);
1041 * Add generic alarm attribute only if there are no individual
1042 * alarm attributes, if there is a global alarm bit, and if
1043 * the generic status register for this page is accessible.
1045 if (!ret && attr->gbit &&
1046 pmbus_check_byte_register(client, page,
1047 data->status_register)) {
1048 ret = pmbus_add_boolean(data, name, "alarm", index,
1050 PB_STATUS_BASE + page,
1059 static int pmbus_add_sensor_attrs(struct i2c_client *client,
1060 struct pmbus_data *data,
1062 const struct pmbus_sensor_attr *attrs,
1065 const struct pmbus_driver_info *info = data->info;
1070 for (i = 0; i < nattrs; i++) {
1073 pages = attrs->paged ? info->pages : 1;
1074 for (page = 0; page < pages; page++) {
1075 if (!(info->func[page] & attrs->func))
1077 ret = pmbus_add_sensor_attrs_one(client, data, info,
1089 static const struct pmbus_limit_attr vin_limit_attrs[] = {
1091 .reg = PMBUS_VIN_UV_WARN_LIMIT,
1093 .alarm = "min_alarm",
1094 .sbit = PB_VOLTAGE_UV_WARNING,
1096 .reg = PMBUS_VIN_UV_FAULT_LIMIT,
1098 .alarm = "lcrit_alarm",
1099 .sbit = PB_VOLTAGE_UV_FAULT,
1101 .reg = PMBUS_VIN_OV_WARN_LIMIT,
1103 .alarm = "max_alarm",
1104 .sbit = PB_VOLTAGE_OV_WARNING,
1106 .reg = PMBUS_VIN_OV_FAULT_LIMIT,
1108 .alarm = "crit_alarm",
1109 .sbit = PB_VOLTAGE_OV_FAULT,
1111 .reg = PMBUS_VIRT_READ_VIN_AVG,
1115 .reg = PMBUS_VIRT_READ_VIN_MIN,
1119 .reg = PMBUS_VIRT_READ_VIN_MAX,
1123 .reg = PMBUS_VIRT_RESET_VIN_HISTORY,
1124 .attr = "reset_history",
1128 static const struct pmbus_limit_attr vmon_limit_attrs[] = {
1130 .reg = PMBUS_VIRT_VMON_UV_WARN_LIMIT,
1132 .alarm = "min_alarm",
1133 .sbit = PB_VOLTAGE_UV_WARNING,
1135 .reg = PMBUS_VIRT_VMON_UV_FAULT_LIMIT,
1137 .alarm = "lcrit_alarm",
1138 .sbit = PB_VOLTAGE_UV_FAULT,
1140 .reg = PMBUS_VIRT_VMON_OV_WARN_LIMIT,
1142 .alarm = "max_alarm",
1143 .sbit = PB_VOLTAGE_OV_WARNING,
1145 .reg = PMBUS_VIRT_VMON_OV_FAULT_LIMIT,
1147 .alarm = "crit_alarm",
1148 .sbit = PB_VOLTAGE_OV_FAULT,
1152 static const struct pmbus_limit_attr vout_limit_attrs[] = {
1154 .reg = PMBUS_VOUT_UV_WARN_LIMIT,
1156 .alarm = "min_alarm",
1157 .sbit = PB_VOLTAGE_UV_WARNING,
1159 .reg = PMBUS_VOUT_UV_FAULT_LIMIT,
1161 .alarm = "lcrit_alarm",
1162 .sbit = PB_VOLTAGE_UV_FAULT,
1164 .reg = PMBUS_VOUT_OV_WARN_LIMIT,
1166 .alarm = "max_alarm",
1167 .sbit = PB_VOLTAGE_OV_WARNING,
1169 .reg = PMBUS_VOUT_OV_FAULT_LIMIT,
1171 .alarm = "crit_alarm",
1172 .sbit = PB_VOLTAGE_OV_FAULT,
1174 .reg = PMBUS_VIRT_READ_VOUT_AVG,
1178 .reg = PMBUS_VIRT_READ_VOUT_MIN,
1182 .reg = PMBUS_VIRT_READ_VOUT_MAX,
1186 .reg = PMBUS_VIRT_RESET_VOUT_HISTORY,
1187 .attr = "reset_history",
1191 static const struct pmbus_sensor_attr voltage_attributes[] = {
1193 .reg = PMBUS_READ_VIN,
1194 .class = PSC_VOLTAGE_IN,
1196 .func = PMBUS_HAVE_VIN,
1197 .sfunc = PMBUS_HAVE_STATUS_INPUT,
1198 .sbase = PB_STATUS_INPUT_BASE,
1199 .gbit = PB_STATUS_VIN_UV,
1200 .limit = vin_limit_attrs,
1201 .nlimit = ARRAY_SIZE(vin_limit_attrs),
1203 .reg = PMBUS_VIRT_READ_VMON,
1204 .class = PSC_VOLTAGE_IN,
1206 .func = PMBUS_HAVE_VMON,
1207 .sfunc = PMBUS_HAVE_STATUS_VMON,
1208 .sbase = PB_STATUS_VMON_BASE,
1209 .limit = vmon_limit_attrs,
1210 .nlimit = ARRAY_SIZE(vmon_limit_attrs),
1212 .reg = PMBUS_READ_VCAP,
1213 .class = PSC_VOLTAGE_IN,
1215 .func = PMBUS_HAVE_VCAP,
1217 .reg = PMBUS_READ_VOUT,
1218 .class = PSC_VOLTAGE_OUT,
1221 .func = PMBUS_HAVE_VOUT,
1222 .sfunc = PMBUS_HAVE_STATUS_VOUT,
1223 .sbase = PB_STATUS_VOUT_BASE,
1224 .gbit = PB_STATUS_VOUT_OV,
1225 .limit = vout_limit_attrs,
1226 .nlimit = ARRAY_SIZE(vout_limit_attrs),
1230 /* Current attributes */
1232 static const struct pmbus_limit_attr iin_limit_attrs[] = {
1234 .reg = PMBUS_IIN_OC_WARN_LIMIT,
1236 .alarm = "max_alarm",
1237 .sbit = PB_IIN_OC_WARNING,
1239 .reg = PMBUS_IIN_OC_FAULT_LIMIT,
1241 .alarm = "crit_alarm",
1242 .sbit = PB_IIN_OC_FAULT,
1244 .reg = PMBUS_VIRT_READ_IIN_AVG,
1248 .reg = PMBUS_VIRT_READ_IIN_MIN,
1252 .reg = PMBUS_VIRT_READ_IIN_MAX,
1256 .reg = PMBUS_VIRT_RESET_IIN_HISTORY,
1257 .attr = "reset_history",
1261 static const struct pmbus_limit_attr iout_limit_attrs[] = {
1263 .reg = PMBUS_IOUT_OC_WARN_LIMIT,
1265 .alarm = "max_alarm",
1266 .sbit = PB_IOUT_OC_WARNING,
1268 .reg = PMBUS_IOUT_UC_FAULT_LIMIT,
1270 .alarm = "lcrit_alarm",
1271 .sbit = PB_IOUT_UC_FAULT,
1273 .reg = PMBUS_IOUT_OC_FAULT_LIMIT,
1275 .alarm = "crit_alarm",
1276 .sbit = PB_IOUT_OC_FAULT,
1278 .reg = PMBUS_VIRT_READ_IOUT_AVG,
1282 .reg = PMBUS_VIRT_READ_IOUT_MIN,
1286 .reg = PMBUS_VIRT_READ_IOUT_MAX,
1290 .reg = PMBUS_VIRT_RESET_IOUT_HISTORY,
1291 .attr = "reset_history",
1295 static const struct pmbus_sensor_attr current_attributes[] = {
1297 .reg = PMBUS_READ_IIN,
1298 .class = PSC_CURRENT_IN,
1300 .func = PMBUS_HAVE_IIN,
1301 .sfunc = PMBUS_HAVE_STATUS_INPUT,
1302 .sbase = PB_STATUS_INPUT_BASE,
1303 .limit = iin_limit_attrs,
1304 .nlimit = ARRAY_SIZE(iin_limit_attrs),
1306 .reg = PMBUS_READ_IOUT,
1307 .class = PSC_CURRENT_OUT,
1310 .func = PMBUS_HAVE_IOUT,
1311 .sfunc = PMBUS_HAVE_STATUS_IOUT,
1312 .sbase = PB_STATUS_IOUT_BASE,
1313 .gbit = PB_STATUS_IOUT_OC,
1314 .limit = iout_limit_attrs,
1315 .nlimit = ARRAY_SIZE(iout_limit_attrs),
1319 /* Power attributes */
1321 static const struct pmbus_limit_attr pin_limit_attrs[] = {
1323 .reg = PMBUS_PIN_OP_WARN_LIMIT,
1326 .sbit = PB_PIN_OP_WARNING,
1328 .reg = PMBUS_VIRT_READ_PIN_AVG,
1332 .reg = PMBUS_VIRT_READ_PIN_MAX,
1334 .attr = "input_highest",
1336 .reg = PMBUS_VIRT_RESET_PIN_HISTORY,
1337 .attr = "reset_history",
1341 static const struct pmbus_limit_attr pout_limit_attrs[] = {
1343 .reg = PMBUS_POUT_MAX,
1345 .alarm = "cap_alarm",
1346 .sbit = PB_POWER_LIMITING,
1348 .reg = PMBUS_POUT_OP_WARN_LIMIT,
1350 .alarm = "max_alarm",
1351 .sbit = PB_POUT_OP_WARNING,
1353 .reg = PMBUS_POUT_OP_FAULT_LIMIT,
1355 .alarm = "crit_alarm",
1356 .sbit = PB_POUT_OP_FAULT,
1358 .reg = PMBUS_VIRT_READ_POUT_AVG,
1362 .reg = PMBUS_VIRT_READ_POUT_MAX,
1364 .attr = "input_highest",
1366 .reg = PMBUS_VIRT_RESET_POUT_HISTORY,
1367 .attr = "reset_history",
1371 static const struct pmbus_sensor_attr power_attributes[] = {
1373 .reg = PMBUS_READ_PIN,
1376 .func = PMBUS_HAVE_PIN,
1377 .sfunc = PMBUS_HAVE_STATUS_INPUT,
1378 .sbase = PB_STATUS_INPUT_BASE,
1379 .limit = pin_limit_attrs,
1380 .nlimit = ARRAY_SIZE(pin_limit_attrs),
1382 .reg = PMBUS_READ_POUT,
1386 .func = PMBUS_HAVE_POUT,
1387 .sfunc = PMBUS_HAVE_STATUS_IOUT,
1388 .sbase = PB_STATUS_IOUT_BASE,
1389 .limit = pout_limit_attrs,
1390 .nlimit = ARRAY_SIZE(pout_limit_attrs),
1394 /* Temperature atributes */
1396 static const struct pmbus_limit_attr temp_limit_attrs[] = {
1398 .reg = PMBUS_UT_WARN_LIMIT,
1401 .alarm = "min_alarm",
1402 .sbit = PB_TEMP_UT_WARNING,
1404 .reg = PMBUS_UT_FAULT_LIMIT,
1407 .alarm = "lcrit_alarm",
1408 .sbit = PB_TEMP_UT_FAULT,
1410 .reg = PMBUS_OT_WARN_LIMIT,
1412 .alarm = "max_alarm",
1413 .sbit = PB_TEMP_OT_WARNING,
1415 .reg = PMBUS_OT_FAULT_LIMIT,
1417 .alarm = "crit_alarm",
1418 .sbit = PB_TEMP_OT_FAULT,
1420 .reg = PMBUS_VIRT_READ_TEMP_MIN,
1423 .reg = PMBUS_VIRT_READ_TEMP_AVG,
1426 .reg = PMBUS_VIRT_READ_TEMP_MAX,
1429 .reg = PMBUS_VIRT_RESET_TEMP_HISTORY,
1430 .attr = "reset_history",
1434 static const struct pmbus_limit_attr temp_limit_attrs2[] = {
1436 .reg = PMBUS_UT_WARN_LIMIT,
1439 .alarm = "min_alarm",
1440 .sbit = PB_TEMP_UT_WARNING,
1442 .reg = PMBUS_UT_FAULT_LIMIT,
1445 .alarm = "lcrit_alarm",
1446 .sbit = PB_TEMP_UT_FAULT,
1448 .reg = PMBUS_OT_WARN_LIMIT,
1450 .alarm = "max_alarm",
1451 .sbit = PB_TEMP_OT_WARNING,
1453 .reg = PMBUS_OT_FAULT_LIMIT,
1455 .alarm = "crit_alarm",
1456 .sbit = PB_TEMP_OT_FAULT,
1458 .reg = PMBUS_VIRT_READ_TEMP2_MIN,
1461 .reg = PMBUS_VIRT_READ_TEMP2_AVG,
1464 .reg = PMBUS_VIRT_READ_TEMP2_MAX,
1467 .reg = PMBUS_VIRT_RESET_TEMP2_HISTORY,
1468 .attr = "reset_history",
1472 static const struct pmbus_limit_attr temp_limit_attrs3[] = {
1474 .reg = PMBUS_UT_WARN_LIMIT,
1477 .alarm = "min_alarm",
1478 .sbit = PB_TEMP_UT_WARNING,
1480 .reg = PMBUS_UT_FAULT_LIMIT,
1483 .alarm = "lcrit_alarm",
1484 .sbit = PB_TEMP_UT_FAULT,
1486 .reg = PMBUS_OT_WARN_LIMIT,
1488 .alarm = "max_alarm",
1489 .sbit = PB_TEMP_OT_WARNING,
1491 .reg = PMBUS_OT_FAULT_LIMIT,
1493 .alarm = "crit_alarm",
1494 .sbit = PB_TEMP_OT_FAULT,
1498 static const struct pmbus_sensor_attr temp_attributes[] = {
1500 .reg = PMBUS_READ_TEMPERATURE_1,
1501 .class = PSC_TEMPERATURE,
1505 .func = PMBUS_HAVE_TEMP,
1506 .sfunc = PMBUS_HAVE_STATUS_TEMP,
1507 .sbase = PB_STATUS_TEMP_BASE,
1508 .gbit = PB_STATUS_TEMPERATURE,
1509 .limit = temp_limit_attrs,
1510 .nlimit = ARRAY_SIZE(temp_limit_attrs),
1512 .reg = PMBUS_READ_TEMPERATURE_2,
1513 .class = PSC_TEMPERATURE,
1517 .func = PMBUS_HAVE_TEMP2,
1518 .sfunc = PMBUS_HAVE_STATUS_TEMP,
1519 .sbase = PB_STATUS_TEMP_BASE,
1520 .gbit = PB_STATUS_TEMPERATURE,
1521 .limit = temp_limit_attrs2,
1522 .nlimit = ARRAY_SIZE(temp_limit_attrs2),
1524 .reg = PMBUS_READ_TEMPERATURE_3,
1525 .class = PSC_TEMPERATURE,
1529 .func = PMBUS_HAVE_TEMP3,
1530 .sfunc = PMBUS_HAVE_STATUS_TEMP,
1531 .sbase = PB_STATUS_TEMP_BASE,
1532 .gbit = PB_STATUS_TEMPERATURE,
1533 .limit = temp_limit_attrs3,
1534 .nlimit = ARRAY_SIZE(temp_limit_attrs3),
1538 static const int pmbus_fan_registers[] = {
1539 PMBUS_READ_FAN_SPEED_1,
1540 PMBUS_READ_FAN_SPEED_2,
1541 PMBUS_READ_FAN_SPEED_3,
1542 PMBUS_READ_FAN_SPEED_4
1545 static const int pmbus_fan_config_registers[] = {
1546 PMBUS_FAN_CONFIG_12,
1547 PMBUS_FAN_CONFIG_12,
1548 PMBUS_FAN_CONFIG_34,
1552 static const int pmbus_fan_status_registers[] = {
1553 PMBUS_STATUS_FAN_12,
1554 PMBUS_STATUS_FAN_12,
1555 PMBUS_STATUS_FAN_34,
1559 static const u32 pmbus_fan_flags[] = {
1566 static const u32 pmbus_fan_status_flags[] = {
1567 PMBUS_HAVE_STATUS_FAN12,
1568 PMBUS_HAVE_STATUS_FAN12,
1569 PMBUS_HAVE_STATUS_FAN34,
1570 PMBUS_HAVE_STATUS_FAN34
1574 static int pmbus_add_fan_attributes(struct i2c_client *client,
1575 struct pmbus_data *data)
1577 const struct pmbus_driver_info *info = data->info;
1582 for (page = 0; page < info->pages; page++) {
1585 for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) {
1588 if (!(info->func[page] & pmbus_fan_flags[f]))
1591 if (!pmbus_check_word_register(client, page,
1592 pmbus_fan_registers[f]))
1596 * Skip fan if not installed.
1597 * Each fan configuration register covers multiple fans,
1598 * so we have to do some magic.
1600 regval = _pmbus_read_byte_data(client, page,
1601 pmbus_fan_config_registers[f]);
1603 (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4)))))
1606 if (pmbus_add_sensor(data, "fan", "input", index,
1607 page, pmbus_fan_registers[f],
1608 PSC_FAN, true, true) == NULL)
1612 * Each fan status register covers multiple fans,
1613 * so we have to do some magic.
1615 if ((info->func[page] & pmbus_fan_status_flags[f]) &&
1616 pmbus_check_byte_register(client,
1617 page, pmbus_fan_status_registers[f])) {
1620 if (f > 1) /* fan 3, 4 */
1621 base = PB_STATUS_FAN34_BASE + page;
1623 base = PB_STATUS_FAN_BASE + page;
1624 ret = pmbus_add_boolean(data, "fan",
1625 "alarm", index, NULL, NULL, base,
1626 PB_FAN_FAN1_WARNING >> (f & 1));
1629 ret = pmbus_add_boolean(data, "fan",
1630 "fault", index, NULL, NULL, base,
1631 PB_FAN_FAN1_FAULT >> (f & 1));
1641 static int pmbus_find_attributes(struct i2c_client *client,
1642 struct pmbus_data *data)
1646 /* Voltage sensors */
1647 ret = pmbus_add_sensor_attrs(client, data, "in", voltage_attributes,
1648 ARRAY_SIZE(voltage_attributes));
1652 /* Current sensors */
1653 ret = pmbus_add_sensor_attrs(client, data, "curr", current_attributes,
1654 ARRAY_SIZE(current_attributes));
1659 ret = pmbus_add_sensor_attrs(client, data, "power", power_attributes,
1660 ARRAY_SIZE(power_attributes));
1664 /* Temperature sensors */
1665 ret = pmbus_add_sensor_attrs(client, data, "temp", temp_attributes,
1666 ARRAY_SIZE(temp_attributes));
1671 ret = pmbus_add_fan_attributes(client, data);
1676 * Identify chip parameters.
1677 * This function is called for all chips.
1679 static int pmbus_identify_common(struct i2c_client *client,
1680 struct pmbus_data *data, int page)
1684 if (pmbus_check_byte_register(client, page, PMBUS_VOUT_MODE))
1685 vout_mode = _pmbus_read_byte_data(client, page,
1687 if (vout_mode >= 0 && vout_mode != 0xff) {
1689 * Not all chips support the VOUT_MODE command,
1690 * so a failure to read it is not an error.
1692 switch (vout_mode >> 5) {
1693 case 0: /* linear mode */
1694 if (data->info->format[PSC_VOLTAGE_OUT] != linear)
1697 data->exponent[page] = ((s8)(vout_mode << 3)) >> 3;
1699 case 1: /* VID mode */
1700 if (data->info->format[PSC_VOLTAGE_OUT] != vid)
1703 case 2: /* direct mode */
1704 if (data->info->format[PSC_VOLTAGE_OUT] != direct)
1712 pmbus_clear_fault_page(client, page);
1716 static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data,
1717 struct pmbus_driver_info *info)
1719 struct device *dev = &client->dev;
1723 * Some PMBus chips don't support PMBUS_STATUS_BYTE, so try
1724 * to use PMBUS_STATUS_WORD instead if that is the case.
1725 * Bail out if both registers are not supported.
1727 data->status_register = PMBUS_STATUS_BYTE;
1728 ret = i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE);
1729 if (ret < 0 || ret == 0xff) {
1730 data->status_register = PMBUS_STATUS_WORD;
1731 ret = i2c_smbus_read_word_data(client, PMBUS_STATUS_WORD);
1732 if (ret < 0 || ret == 0xffff) {
1733 dev_err(dev, "PMBus status register not found\n");
1738 pmbus_clear_faults(client);
1740 if (info->identify) {
1741 ret = (*info->identify)(client, info);
1743 dev_err(dev, "Chip identification failed\n");
1748 if (info->pages <= 0 || info->pages > PMBUS_PAGES) {
1749 dev_err(dev, "Bad number of PMBus pages: %d\n", info->pages);
1753 for (page = 0; page < info->pages; page++) {
1754 ret = pmbus_identify_common(client, data, page);
1756 dev_err(dev, "Failed to identify chip capabilities\n");
1763 #if IS_ENABLED(CONFIG_REGULATOR)
1764 static int pmbus_regulator_is_enabled(struct regulator_dev *rdev)
1766 struct device *dev = rdev_get_dev(rdev);
1767 struct i2c_client *client = to_i2c_client(dev->parent);
1768 u8 page = rdev_get_id(rdev);
1771 ret = pmbus_read_byte_data(client, page, PMBUS_OPERATION);
1775 return !!(ret & PB_OPERATION_CONTROL_ON);
1778 static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable)
1780 struct device *dev = rdev_get_dev(rdev);
1781 struct i2c_client *client = to_i2c_client(dev->parent);
1782 u8 page = rdev_get_id(rdev);
1784 return pmbus_update_byte_data(client, page, PMBUS_OPERATION,
1785 PB_OPERATION_CONTROL_ON,
1786 enable ? PB_OPERATION_CONTROL_ON : 0);
1789 static int pmbus_regulator_enable(struct regulator_dev *rdev)
1791 return _pmbus_regulator_on_off(rdev, 1);
1794 static int pmbus_regulator_disable(struct regulator_dev *rdev)
1796 return _pmbus_regulator_on_off(rdev, 0);
1799 struct regulator_ops pmbus_regulator_ops = {
1800 .enable = pmbus_regulator_enable,
1801 .disable = pmbus_regulator_disable,
1802 .is_enabled = pmbus_regulator_is_enabled,
1804 EXPORT_SYMBOL_GPL(pmbus_regulator_ops);
1806 static int pmbus_regulator_register(struct pmbus_data *data)
1808 struct device *dev = data->dev;
1809 const struct pmbus_driver_info *info = data->info;
1810 const struct pmbus_platform_data *pdata = dev_get_platdata(dev);
1811 struct regulator_dev *rdev;
1814 for (i = 0; i < info->num_regulators; i++) {
1815 struct regulator_config config = { };
1818 config.driver_data = data;
1820 if (pdata && pdata->reg_init_data)
1821 config.init_data = &pdata->reg_init_data[i];
1823 rdev = devm_regulator_register(dev, &info->reg_desc[i],
1826 dev_err(dev, "Failed to register %s regulator\n",
1827 info->reg_desc[i].name);
1828 return PTR_ERR(rdev);
1835 static int pmbus_regulator_register(struct pmbus_data *data)
1841 int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
1842 struct pmbus_driver_info *info)
1844 struct device *dev = &client->dev;
1845 const struct pmbus_platform_data *pdata = dev_get_platdata(dev);
1846 struct pmbus_data *data;
1852 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE
1853 | I2C_FUNC_SMBUS_BYTE_DATA
1854 | I2C_FUNC_SMBUS_WORD_DATA))
1857 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
1861 i2c_set_clientdata(client, data);
1862 mutex_init(&data->update_lock);
1866 data->flags = pdata->flags;
1869 ret = pmbus_init_common(client, data, info);
1873 ret = pmbus_find_attributes(client, data);
1878 * If there are no attributes, something is wrong.
1879 * Bail out instead of trying to register nothing.
1881 if (!data->num_attributes) {
1882 dev_err(dev, "No attributes found\n");
1887 data->groups[0] = &data->group;
1888 data->hwmon_dev = hwmon_device_register_with_groups(dev, client->name,
1889 data, data->groups);
1890 if (IS_ERR(data->hwmon_dev)) {
1891 ret = PTR_ERR(data->hwmon_dev);
1892 dev_err(dev, "Failed to register hwmon device\n");
1896 ret = pmbus_regulator_register(data);
1898 goto out_unregister;
1903 hwmon_device_unregister(data->hwmon_dev);
1905 kfree(data->group.attrs);
1908 EXPORT_SYMBOL_GPL(pmbus_do_probe);
1910 int pmbus_do_remove(struct i2c_client *client)
1912 struct pmbus_data *data = i2c_get_clientdata(client);
1913 hwmon_device_unregister(data->hwmon_dev);
1914 kfree(data->group.attrs);
1917 EXPORT_SYMBOL_GPL(pmbus_do_remove);
1919 MODULE_AUTHOR("Guenter Roeck");
1920 MODULE_DESCRIPTION("PMBus core driver");
1921 MODULE_LICENSE("GPL");