2 * Hardware monitoring driver for PMBus devices
4 * Copyright (c) 2010, 2011 Ericsson AB.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <linux/kernel.h>
22 #include <linux/math64.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/delay.h>
31 #include <linux/i2c/pmbus.h>
35 * Constants needed to determine number of sensors, booleans, and labels.
37 #define PMBUS_MAX_INPUT_SENSORS 22 /* 10*volt, 7*curr, 5*power */
38 #define PMBUS_VOUT_SENSORS_PER_PAGE 9 /* input, min, max, lcrit,
39 crit, lowest, highest, avg,
41 #define PMBUS_IOUT_SENSORS_PER_PAGE 8 /* input, min, max, crit,
44 #define PMBUS_POUT_SENSORS_PER_PAGE 4 /* input, cap, max, crit */
45 #define PMBUS_MAX_SENSORS_PER_FAN 1 /* input */
46 #define PMBUS_MAX_SENSORS_PER_TEMP 8 /* input, min, max, lcrit,
47 crit, lowest, highest,
50 #define PMBUS_MAX_INPUT_BOOLEANS 7 /* v: min_alarm, max_alarm,
51 lcrit_alarm, crit_alarm;
54 #define PMBUS_VOUT_BOOLEANS_PER_PAGE 4 /* min_alarm, max_alarm,
55 lcrit_alarm, crit_alarm */
56 #define PMBUS_IOUT_BOOLEANS_PER_PAGE 3 /* alarm, lcrit_alarm,
58 #define PMBUS_POUT_BOOLEANS_PER_PAGE 3 /* cap_alarm, alarm, crit_alarm
60 #define PMBUS_MAX_BOOLEANS_PER_FAN 2 /* alarm, fault */
61 #define PMBUS_MAX_BOOLEANS_PER_TEMP 4 /* min_alarm, max_alarm,
62 lcrit_alarm, crit_alarm */
64 #define PMBUS_MAX_INPUT_LABELS 4 /* vin, vcap, iin, pin */
67 * status, status_vout, status_iout, status_fans, status_fan34, and status_temp
68 * are paged. status_input is unpaged.
70 #define PB_NUM_STATUS_REG (PMBUS_PAGES * 6 + 1)
73 * Index into status register array, per status register group
75 #define PB_STATUS_BASE 0
76 #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES)
77 #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES)
78 #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES)
79 #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES)
80 #define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES)
81 #define PB_STATUS_TEMP_BASE (PB_STATUS_INPUT_BASE + 1)
83 #define PMBUS_NAME_SIZE 24
86 char name[PMBUS_NAME_SIZE]; /* sysfs sensor name */
87 struct sensor_device_attribute attribute;
88 u8 page; /* page number */
89 u16 reg; /* register */
90 enum pmbus_sensor_classes class; /* sensor class */
91 bool update; /* runtime sensor update needed */
92 int data; /* Sensor data.
93 Negative if there was a read error */
96 struct pmbus_boolean {
97 char name[PMBUS_NAME_SIZE]; /* sysfs boolean name */
98 struct sensor_device_attribute attribute;
102 char name[PMBUS_NAME_SIZE]; /* sysfs label name */
103 struct sensor_device_attribute attribute;
104 char label[PMBUS_NAME_SIZE]; /* label */
108 struct device *hwmon_dev;
110 u32 flags; /* from platform data */
112 int exponent; /* linear mode: exponent for output voltages */
114 const struct pmbus_driver_info *info;
118 struct attribute **attributes;
119 struct attribute_group group;
122 * Sensors cover both sensor and limit registers.
126 struct pmbus_sensor *sensors;
128 * Booleans are used for alarms.
129 * Values are determined from status registers.
133 struct pmbus_boolean *booleans;
135 * Labels are used to map generic names (e.g., "in1")
136 * to PMBus specific names (e.g., "vin" or "vout1").
140 struct pmbus_label *labels;
142 struct mutex update_lock;
144 unsigned long last_updated; /* in jiffies */
147 * A single status register covers multiple attributes,
148 * so we keep them all together.
150 u8 status[PB_NUM_STATUS_REG];
155 int pmbus_set_page(struct i2c_client *client, u8 page)
157 struct pmbus_data *data = i2c_get_clientdata(client);
161 if (page != data->currpage) {
162 rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
163 newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE);
167 data->currpage = page;
171 EXPORT_SYMBOL_GPL(pmbus_set_page);
173 int pmbus_write_byte(struct i2c_client *client, int page, u8 value)
178 rv = pmbus_set_page(client, page);
183 return i2c_smbus_write_byte(client, value);
185 EXPORT_SYMBOL_GPL(pmbus_write_byte);
188 * _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if
189 * a device specific mapping funcion exists and calls it if necessary.
191 static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value)
193 struct pmbus_data *data = i2c_get_clientdata(client);
194 const struct pmbus_driver_info *info = data->info;
197 if (info->write_byte) {
198 status = info->write_byte(client, page, value);
199 if (status != -ENODATA)
202 return pmbus_write_byte(client, page, value);
205 int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word)
209 rv = pmbus_set_page(client, page);
213 return i2c_smbus_write_word_data(client, reg, word);
215 EXPORT_SYMBOL_GPL(pmbus_write_word_data);
218 * _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if
219 * a device specific mapping function exists and calls it if necessary.
221 static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg,
224 struct pmbus_data *data = i2c_get_clientdata(client);
225 const struct pmbus_driver_info *info = data->info;
228 if (info->write_word_data) {
229 status = info->write_word_data(client, page, reg, word);
230 if (status != -ENODATA)
233 if (reg >= PMBUS_VIRT_BASE)
235 return pmbus_write_word_data(client, page, reg, word);
238 int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg)
242 rv = pmbus_set_page(client, page);
246 return i2c_smbus_read_word_data(client, reg);
248 EXPORT_SYMBOL_GPL(pmbus_read_word_data);
251 * _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if
252 * a device specific mapping function exists and calls it if necessary.
254 static int _pmbus_read_word_data(struct i2c_client *client, int page, int reg)
256 struct pmbus_data *data = i2c_get_clientdata(client);
257 const struct pmbus_driver_info *info = data->info;
260 if (info->read_word_data) {
261 status = info->read_word_data(client, page, reg);
262 if (status != -ENODATA)
265 if (reg >= PMBUS_VIRT_BASE)
267 return pmbus_read_word_data(client, page, reg);
270 int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg)
275 rv = pmbus_set_page(client, page);
280 return i2c_smbus_read_byte_data(client, reg);
282 EXPORT_SYMBOL_GPL(pmbus_read_byte_data);
285 * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if
286 * a device specific mapping function exists and calls it if necessary.
288 static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg)
290 struct pmbus_data *data = i2c_get_clientdata(client);
291 const struct pmbus_driver_info *info = data->info;
294 if (info->read_byte_data) {
295 status = info->read_byte_data(client, page, reg);
296 if (status != -ENODATA)
299 return pmbus_read_byte_data(client, page, reg);
302 static void pmbus_clear_fault_page(struct i2c_client *client, int page)
304 _pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
307 void pmbus_clear_faults(struct i2c_client *client)
309 struct pmbus_data *data = i2c_get_clientdata(client);
312 for (i = 0; i < data->info->pages; i++)
313 pmbus_clear_fault_page(client, i);
315 EXPORT_SYMBOL_GPL(pmbus_clear_faults);
317 static int pmbus_check_status_cml(struct i2c_client *client)
321 status = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_BYTE);
322 if (status < 0 || (status & PB_STATUS_CML)) {
323 status2 = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML);
324 if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND))
330 bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg)
333 struct pmbus_data *data = i2c_get_clientdata(client);
335 rv = _pmbus_read_byte_data(client, page, reg);
336 if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK))
337 rv = pmbus_check_status_cml(client);
338 pmbus_clear_fault_page(client, -1);
341 EXPORT_SYMBOL_GPL(pmbus_check_byte_register);
343 bool pmbus_check_word_register(struct i2c_client *client, int page, int reg)
346 struct pmbus_data *data = i2c_get_clientdata(client);
348 rv = _pmbus_read_word_data(client, page, reg);
349 if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK))
350 rv = pmbus_check_status_cml(client);
351 pmbus_clear_fault_page(client, -1);
354 EXPORT_SYMBOL_GPL(pmbus_check_word_register);
356 const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client)
358 struct pmbus_data *data = i2c_get_clientdata(client);
362 EXPORT_SYMBOL_GPL(pmbus_get_driver_info);
364 static struct pmbus_data *pmbus_update_device(struct device *dev)
366 struct i2c_client *client = to_i2c_client(dev);
367 struct pmbus_data *data = i2c_get_clientdata(client);
368 const struct pmbus_driver_info *info = data->info;
370 mutex_lock(&data->update_lock);
371 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
374 for (i = 0; i < info->pages; i++)
375 data->status[PB_STATUS_BASE + i]
376 = _pmbus_read_byte_data(client, i,
378 for (i = 0; i < info->pages; i++) {
379 if (!(info->func[i] & PMBUS_HAVE_STATUS_VOUT))
381 data->status[PB_STATUS_VOUT_BASE + i]
382 = _pmbus_read_byte_data(client, i, PMBUS_STATUS_VOUT);
384 for (i = 0; i < info->pages; i++) {
385 if (!(info->func[i] & PMBUS_HAVE_STATUS_IOUT))
387 data->status[PB_STATUS_IOUT_BASE + i]
388 = _pmbus_read_byte_data(client, i, PMBUS_STATUS_IOUT);
390 for (i = 0; i < info->pages; i++) {
391 if (!(info->func[i] & PMBUS_HAVE_STATUS_TEMP))
393 data->status[PB_STATUS_TEMP_BASE + i]
394 = _pmbus_read_byte_data(client, i,
395 PMBUS_STATUS_TEMPERATURE);
397 for (i = 0; i < info->pages; i++) {
398 if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN12))
400 data->status[PB_STATUS_FAN_BASE + i]
401 = _pmbus_read_byte_data(client, i,
402 PMBUS_STATUS_FAN_12);
405 for (i = 0; i < info->pages; i++) {
406 if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN34))
408 data->status[PB_STATUS_FAN34_BASE + i]
409 = _pmbus_read_byte_data(client, i,
410 PMBUS_STATUS_FAN_34);
413 if (info->func[0] & PMBUS_HAVE_STATUS_INPUT)
414 data->status[PB_STATUS_INPUT_BASE]
415 = _pmbus_read_byte_data(client, 0,
418 for (i = 0; i < data->num_sensors; i++) {
419 struct pmbus_sensor *sensor = &data->sensors[i];
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;
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 s64 b, 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_s64(val + 5LL, 10L); /* round closest */
512 val = div_s64(val - b, m);
513 return clamp_val(val, LONG_MIN, LONG_MAX);
517 * Convert VID sensor values to milli- or micro-units
518 * depending on sensor type.
519 * We currently only support VR11.
521 static long pmbus_reg2data_vid(struct pmbus_data *data,
522 struct pmbus_sensor *sensor)
524 long val = sensor->data;
526 if (val < 0x02 || val > 0xb2)
528 return DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100);
531 static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)
535 switch (data->info->format[sensor->class]) {
537 val = pmbus_reg2data_direct(data, sensor);
540 val = pmbus_reg2data_vid(data, sensor);
544 val = pmbus_reg2data_linear(data, sensor);
550 #define MAX_MANTISSA (1023 * 1000)
551 #define MIN_MANTISSA (511 * 1000)
553 static u16 pmbus_data2reg_linear(struct pmbus_data *data,
554 enum pmbus_sensor_classes class, long val)
556 s16 exponent = 0, mantissa;
557 bool negative = false;
563 if (class == PSC_VOLTAGE_OUT) {
564 /* LINEAR16 does not support negative voltages */
569 * For a static exponents, we don't have a choice
570 * but to adjust the value to it.
572 if (data->exponent < 0)
573 val <<= -data->exponent;
575 val >>= data->exponent;
576 val = DIV_ROUND_CLOSEST(val, 1000);
585 /* Power is in uW. Convert to mW before converting. */
586 if (class == PSC_POWER)
587 val = DIV_ROUND_CLOSEST(val, 1000L);
590 * For simplicity, convert fan data to milli-units
591 * before calculating the exponent.
593 if (class == PSC_FAN)
596 /* Reduce large mantissa until it fits into 10 bit */
597 while (val >= MAX_MANTISSA && exponent < 15) {
601 /* Increase small mantissa to improve precision */
602 while (val < MIN_MANTISSA && exponent > -15) {
607 /* Convert mantissa from milli-units to units */
608 mantissa = DIV_ROUND_CLOSEST(val, 1000);
610 /* Ensure that resulting number is within range */
611 if (mantissa > 0x3ff)
616 mantissa = -mantissa;
618 /* Convert to 5 bit exponent, 11 bit mantissa */
619 return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800);
622 static u16 pmbus_data2reg_direct(struct pmbus_data *data,
623 enum pmbus_sensor_classes class, long val)
628 m = data->info->m[class];
629 b = data->info->b[class];
630 R = data->info->R[class];
632 /* Power is in uW. Adjust R and b. */
633 if (class == PSC_POWER) {
638 /* Calculate Y = (m * X + b) * 10^R */
639 if (class != PSC_FAN) {
640 R -= 3; /* Adjust R and b for data in milli-units */
643 val64 = val64 * m + b;
650 val64 = div_s64(val64 + 5LL, 10L); /* round closest */
654 return (u16)clamp_val(val64, -32768, 32767);
657 static u16 pmbus_data2reg_vid(struct pmbus_data *data,
658 enum pmbus_sensor_classes class, long val)
660 val = SENSORS_LIMIT(val, 500, 1600);
662 return 2 + DIV_ROUND_CLOSEST((1600 - val) * 100, 625);
665 static u16 pmbus_data2reg(struct pmbus_data *data,
666 enum pmbus_sensor_classes class, long val)
670 switch (data->info->format[class]) {
672 regval = pmbus_data2reg_direct(data, class, val);
675 regval = pmbus_data2reg_vid(data, class, val);
679 regval = pmbus_data2reg_linear(data, class, val);
686 * Return boolean calculated from converted data.
687 * <index> defines a status register index and mask, and optionally
688 * two sensor indexes.
689 * The upper half-word references the two sensors,
690 * two sensor indices.
691 * The upper half-word references the two optional sensors,
692 * the lower half word references status register and mask.
693 * The function returns true if (status[reg] & mask) is true and,
694 * if specified, if v1 >= v2.
695 * To determine if an object exceeds upper limits, specify <v, limit>.
696 * To determine if an object exceeds lower limits, specify <limit, v>.
698 * For booleans created with pmbus_add_boolean_reg(), only the lower 16 bits of
699 * index are set. s1 and s2 (the sensor index values) are zero in this case.
700 * The function returns true if (status[reg] & mask) is true.
702 * If the boolean was created with pmbus_add_boolean_cmp(), a comparison against
703 * a specified limit has to be performed to determine the boolean result.
704 * In this case, the function returns true if v1 >= v2 (where v1 and v2 are
705 * sensor values referenced by sensor indices s1 and s2).
707 * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>.
708 * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>.
710 * If a negative value is stored in any of the referenced registers, this value
711 * reflects an error code which will be returned.
713 static int pmbus_get_boolean(struct pmbus_data *data, int index, int *val)
715 u8 s1 = (index >> 24) & 0xff;
716 u8 s2 = (index >> 16) & 0xff;
717 u8 reg = (index >> 8) & 0xff;
718 u8 mask = index & 0xff;
722 status = data->status[reg];
726 regval = status & mask;
731 struct pmbus_sensor *sensor1, *sensor2;
733 sensor1 = &data->sensors[s1];
734 if (sensor1->data < 0)
735 return sensor1->data;
736 sensor2 = &data->sensors[s2];
737 if (sensor2->data < 0)
738 return sensor2->data;
740 v1 = pmbus_reg2data(data, sensor1);
741 v2 = pmbus_reg2data(data, sensor2);
742 *val = !!(regval && v1 >= v2);
747 static ssize_t pmbus_show_boolean(struct device *dev,
748 struct device_attribute *da, char *buf)
750 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
751 struct pmbus_data *data = pmbus_update_device(dev);
755 err = pmbus_get_boolean(data, attr->index, &val);
758 return snprintf(buf, PAGE_SIZE, "%d\n", val);
761 static ssize_t pmbus_show_sensor(struct device *dev,
762 struct device_attribute *da, char *buf)
764 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
765 struct pmbus_data *data = pmbus_update_device(dev);
766 struct pmbus_sensor *sensor;
768 sensor = &data->sensors[attr->index];
769 if (sensor->data < 0)
772 return snprintf(buf, PAGE_SIZE, "%ld\n", pmbus_reg2data(data, sensor));
775 static ssize_t pmbus_set_sensor(struct device *dev,
776 struct device_attribute *devattr,
777 const char *buf, size_t count)
779 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
780 struct i2c_client *client = to_i2c_client(dev);
781 struct pmbus_data *data = i2c_get_clientdata(client);
782 struct pmbus_sensor *sensor = &data->sensors[attr->index];
788 if (strict_strtol(buf, 10, &val) < 0)
791 mutex_lock(&data->update_lock);
792 regval = pmbus_data2reg(data, sensor->class, val);
793 ret = _pmbus_write_word_data(client, sensor->page, sensor->reg, regval);
797 data->sensors[attr->index].data = regval;
798 mutex_unlock(&data->update_lock);
802 static ssize_t pmbus_show_label(struct device *dev,
803 struct device_attribute *da, char *buf)
805 struct i2c_client *client = to_i2c_client(dev);
806 struct pmbus_data *data = i2c_get_clientdata(client);
807 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
809 return snprintf(buf, PAGE_SIZE, "%s\n",
810 data->labels[attr->index].label);
813 #define PMBUS_ADD_ATTR(data, _name, _idx, _mode, _type, _show, _set) \
815 struct sensor_device_attribute *a \
816 = &data->_type##s[data->num_##_type##s].attribute; \
817 BUG_ON(data->num_attributes >= data->max_attributes); \
818 sysfs_attr_init(&a->dev_attr.attr); \
819 a->dev_attr.attr.name = _name; \
820 a->dev_attr.attr.mode = _mode; \
821 a->dev_attr.show = _show; \
822 a->dev_attr.store = _set; \
824 data->attributes[data->num_attributes] = &a->dev_attr.attr; \
825 data->num_attributes++; \
828 #define PMBUS_ADD_GET_ATTR(data, _name, _type, _idx) \
829 PMBUS_ADD_ATTR(data, _name, _idx, S_IRUGO, _type, \
830 pmbus_show_##_type, NULL)
832 #define PMBUS_ADD_SET_ATTR(data, _name, _type, _idx) \
833 PMBUS_ADD_ATTR(data, _name, _idx, S_IWUSR | S_IRUGO, _type, \
834 pmbus_show_##_type, pmbus_set_##_type)
836 static void pmbus_add_boolean(struct pmbus_data *data,
837 const char *name, const char *type, int seq,
840 struct pmbus_boolean *boolean;
842 BUG_ON(data->num_booleans >= data->max_booleans);
844 boolean = &data->booleans[data->num_booleans];
846 snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s",
848 PMBUS_ADD_GET_ATTR(data, boolean->name, boolean, idx);
849 data->num_booleans++;
852 static void pmbus_add_boolean_reg(struct pmbus_data *data,
853 const char *name, const char *type,
854 int seq, int reg, int bit)
856 pmbus_add_boolean(data, name, type, seq, (reg << 8) | bit);
859 static void pmbus_add_boolean_cmp(struct pmbus_data *data,
860 const char *name, const char *type,
861 int seq, int i1, int i2, int reg, int mask)
863 pmbus_add_boolean(data, name, type, seq,
864 (i1 << 24) | (i2 << 16) | (reg << 8) | mask);
867 static void pmbus_add_sensor(struct pmbus_data *data,
868 const char *name, const char *type, int seq,
869 int page, int reg, enum pmbus_sensor_classes class,
870 bool update, bool readonly)
872 struct pmbus_sensor *sensor;
874 BUG_ON(data->num_sensors >= data->max_sensors);
876 sensor = &data->sensors[data->num_sensors];
877 snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s",
881 sensor->class = class;
882 sensor->update = update;
884 PMBUS_ADD_GET_ATTR(data, sensor->name, sensor,
887 PMBUS_ADD_SET_ATTR(data, sensor->name, sensor,
892 static void pmbus_add_label(struct pmbus_data *data,
893 const char *name, int seq,
894 const char *lstring, int index)
896 struct pmbus_label *label;
898 BUG_ON(data->num_labels >= data->max_labels);
900 label = &data->labels[data->num_labels];
901 snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq);
903 strncpy(label->label, lstring, sizeof(label->label) - 1);
905 snprintf(label->label, sizeof(label->label), "%s%d", lstring,
908 PMBUS_ADD_GET_ATTR(data, label->name, label, data->num_labels);
913 * Determine maximum number of sensors, booleans, and labels.
914 * To keep things simple, only make a rough high estimate.
916 static void pmbus_find_max_attr(struct i2c_client *client,
917 struct pmbus_data *data)
919 const struct pmbus_driver_info *info = data->info;
920 int page, max_sensors, max_booleans, max_labels;
922 max_sensors = PMBUS_MAX_INPUT_SENSORS;
923 max_booleans = PMBUS_MAX_INPUT_BOOLEANS;
924 max_labels = PMBUS_MAX_INPUT_LABELS;
926 for (page = 0; page < info->pages; page++) {
927 if (info->func[page] & PMBUS_HAVE_VOUT) {
928 max_sensors += PMBUS_VOUT_SENSORS_PER_PAGE;
929 max_booleans += PMBUS_VOUT_BOOLEANS_PER_PAGE;
932 if (info->func[page] & PMBUS_HAVE_IOUT) {
933 max_sensors += PMBUS_IOUT_SENSORS_PER_PAGE;
934 max_booleans += PMBUS_IOUT_BOOLEANS_PER_PAGE;
937 if (info->func[page] & PMBUS_HAVE_POUT) {
938 max_sensors += PMBUS_POUT_SENSORS_PER_PAGE;
939 max_booleans += PMBUS_POUT_BOOLEANS_PER_PAGE;
942 if (info->func[page] & PMBUS_HAVE_FAN12) {
943 max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN;
944 max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN;
946 if (info->func[page] & PMBUS_HAVE_FAN34) {
947 max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN;
948 max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN;
950 if (info->func[page] & PMBUS_HAVE_TEMP) {
951 max_sensors += PMBUS_MAX_SENSORS_PER_TEMP;
952 max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP;
954 if (info->func[page] & PMBUS_HAVE_TEMP2) {
955 max_sensors += PMBUS_MAX_SENSORS_PER_TEMP;
956 max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP;
958 if (info->func[page] & PMBUS_HAVE_TEMP3) {
959 max_sensors += PMBUS_MAX_SENSORS_PER_TEMP;
960 max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP;
963 data->max_sensors = max_sensors;
964 data->max_booleans = max_booleans;
965 data->max_labels = max_labels;
966 data->max_attributes = max_sensors + max_booleans + max_labels;
970 * Search for attributes. Allocate sensors, booleans, and labels as needed.
974 * The pmbus_limit_attr structure describes a single limit attribute
975 * and its associated alarm attribute.
977 struct pmbus_limit_attr {
978 u16 reg; /* Limit register */
979 bool update; /* True if register needs updates */
980 bool low; /* True if low limit; for limits with compare
982 const char *attr; /* Attribute name */
983 const char *alarm; /* Alarm attribute name */
984 u32 sbit; /* Alarm attribute status bit */
988 * The pmbus_sensor_attr structure describes one sensor attribute. This
989 * description includes a reference to the associated limit attributes.
991 struct pmbus_sensor_attr {
992 u8 reg; /* sensor register */
993 enum pmbus_sensor_classes class;/* sensor class */
994 const char *label; /* sensor label */
995 bool paged; /* true if paged sensor */
996 bool update; /* true if update needed */
997 bool compare; /* true if compare function needed */
998 u32 func; /* sensor mask */
999 u32 sfunc; /* sensor status mask */
1000 int sbase; /* status base register */
1001 u32 gbit; /* generic status bit */
1002 const struct pmbus_limit_attr *limit;/* limit registers */
1003 int nlimit; /* # of limit registers */
1007 * Add a set of limit attributes and, if supported, the associated
1010 static bool pmbus_add_limit_attrs(struct i2c_client *client,
1011 struct pmbus_data *data,
1012 const struct pmbus_driver_info *info,
1013 const char *name, int index, int page,
1015 const struct pmbus_sensor_attr *attr)
1017 const struct pmbus_limit_attr *l = attr->limit;
1018 int nlimit = attr->nlimit;
1019 bool have_alarm = false;
1022 for (i = 0; i < nlimit; i++) {
1023 if (pmbus_check_word_register(client, page, l->reg)) {
1024 cindex = data->num_sensors;
1025 pmbus_add_sensor(data, name, l->attr, index, page,
1026 l->reg, attr->class,
1027 attr->update || l->update,
1029 if (l->sbit && (info->func[page] & attr->sfunc)) {
1030 if (attr->compare) {
1031 pmbus_add_boolean_cmp(data, name,
1033 l->low ? cindex : cbase,
1034 l->low ? cbase : cindex,
1035 attr->sbase + page, l->sbit);
1037 pmbus_add_boolean_reg(data, name,
1039 attr->sbase + page, l->sbit);
1049 static void pmbus_add_sensor_attrs_one(struct i2c_client *client,
1050 struct pmbus_data *data,
1051 const struct pmbus_driver_info *info,
1053 int index, int page,
1054 const struct pmbus_sensor_attr *attr)
1057 int cbase = data->num_sensors;
1060 pmbus_add_label(data, name, index, attr->label,
1061 attr->paged ? page + 1 : 0);
1062 pmbus_add_sensor(data, name, "input", index, page, attr->reg,
1063 attr->class, true, true);
1065 have_alarm = pmbus_add_limit_attrs(client, data, info, name,
1066 index, page, cbase, attr);
1068 * Add generic alarm attribute only if there are no individual
1069 * alarm attributes, if there is a global alarm bit, and if
1070 * the generic status register for this page is accessible.
1072 if (!have_alarm && attr->gbit &&
1073 pmbus_check_byte_register(client, page, PMBUS_STATUS_BYTE))
1074 pmbus_add_boolean_reg(data, name, "alarm", index,
1075 PB_STATUS_BASE + page,
1080 static void pmbus_add_sensor_attrs(struct i2c_client *client,
1081 struct pmbus_data *data,
1083 const struct pmbus_sensor_attr *attrs,
1086 const struct pmbus_driver_info *info = data->info;
1090 for (i = 0; i < nattrs; i++) {
1093 pages = attrs->paged ? info->pages : 1;
1094 for (page = 0; page < pages; page++) {
1095 if (!(info->func[page] & attrs->func))
1097 pmbus_add_sensor_attrs_one(client, data, info, name,
1098 index, page, attrs);
1105 static const struct pmbus_limit_attr vin_limit_attrs[] = {
1107 .reg = PMBUS_VIN_UV_WARN_LIMIT,
1109 .alarm = "min_alarm",
1110 .sbit = PB_VOLTAGE_UV_WARNING,
1112 .reg = PMBUS_VIN_UV_FAULT_LIMIT,
1114 .alarm = "lcrit_alarm",
1115 .sbit = PB_VOLTAGE_UV_FAULT,
1117 .reg = PMBUS_VIN_OV_WARN_LIMIT,
1119 .alarm = "max_alarm",
1120 .sbit = PB_VOLTAGE_OV_WARNING,
1122 .reg = PMBUS_VIN_OV_FAULT_LIMIT,
1124 .alarm = "crit_alarm",
1125 .sbit = PB_VOLTAGE_OV_FAULT,
1127 .reg = PMBUS_VIRT_READ_VIN_AVG,
1131 .reg = PMBUS_VIRT_READ_VIN_MIN,
1135 .reg = PMBUS_VIRT_READ_VIN_MAX,
1139 .reg = PMBUS_VIRT_RESET_VIN_HISTORY,
1140 .attr = "reset_history",
1144 static const struct pmbus_limit_attr vout_limit_attrs[] = {
1146 .reg = PMBUS_VOUT_UV_WARN_LIMIT,
1148 .alarm = "min_alarm",
1149 .sbit = PB_VOLTAGE_UV_WARNING,
1151 .reg = PMBUS_VOUT_UV_FAULT_LIMIT,
1153 .alarm = "lcrit_alarm",
1154 .sbit = PB_VOLTAGE_UV_FAULT,
1156 .reg = PMBUS_VOUT_OV_WARN_LIMIT,
1158 .alarm = "max_alarm",
1159 .sbit = PB_VOLTAGE_OV_WARNING,
1161 .reg = PMBUS_VOUT_OV_FAULT_LIMIT,
1163 .alarm = "crit_alarm",
1164 .sbit = PB_VOLTAGE_OV_FAULT,
1166 .reg = PMBUS_VIRT_READ_VOUT_AVG,
1170 .reg = PMBUS_VIRT_READ_VOUT_MIN,
1174 .reg = PMBUS_VIRT_READ_VOUT_MAX,
1178 .reg = PMBUS_VIRT_RESET_VOUT_HISTORY,
1179 .attr = "reset_history",
1183 static const struct pmbus_sensor_attr voltage_attributes[] = {
1185 .reg = PMBUS_READ_VIN,
1186 .class = PSC_VOLTAGE_IN,
1188 .func = PMBUS_HAVE_VIN,
1189 .sfunc = PMBUS_HAVE_STATUS_INPUT,
1190 .sbase = PB_STATUS_INPUT_BASE,
1191 .gbit = PB_STATUS_VIN_UV,
1192 .limit = vin_limit_attrs,
1193 .nlimit = ARRAY_SIZE(vin_limit_attrs),
1195 .reg = PMBUS_READ_VCAP,
1196 .class = PSC_VOLTAGE_IN,
1198 .func = PMBUS_HAVE_VCAP,
1200 .reg = PMBUS_READ_VOUT,
1201 .class = PSC_VOLTAGE_OUT,
1204 .func = PMBUS_HAVE_VOUT,
1205 .sfunc = PMBUS_HAVE_STATUS_VOUT,
1206 .sbase = PB_STATUS_VOUT_BASE,
1207 .gbit = PB_STATUS_VOUT_OV,
1208 .limit = vout_limit_attrs,
1209 .nlimit = ARRAY_SIZE(vout_limit_attrs),
1213 /* Current attributes */
1215 static const struct pmbus_limit_attr iin_limit_attrs[] = {
1217 .reg = PMBUS_IIN_OC_WARN_LIMIT,
1219 .alarm = "max_alarm",
1220 .sbit = PB_IIN_OC_WARNING,
1222 .reg = PMBUS_IIN_OC_FAULT_LIMIT,
1224 .alarm = "crit_alarm",
1225 .sbit = PB_IIN_OC_FAULT,
1227 .reg = PMBUS_VIRT_READ_IIN_AVG,
1231 .reg = PMBUS_VIRT_READ_IIN_MIN,
1235 .reg = PMBUS_VIRT_READ_IIN_MAX,
1239 .reg = PMBUS_VIRT_RESET_IIN_HISTORY,
1240 .attr = "reset_history",
1244 static const struct pmbus_limit_attr iout_limit_attrs[] = {
1246 .reg = PMBUS_IOUT_OC_WARN_LIMIT,
1248 .alarm = "max_alarm",
1249 .sbit = PB_IOUT_OC_WARNING,
1251 .reg = PMBUS_IOUT_UC_FAULT_LIMIT,
1253 .alarm = "lcrit_alarm",
1254 .sbit = PB_IOUT_UC_FAULT,
1256 .reg = PMBUS_IOUT_OC_FAULT_LIMIT,
1258 .alarm = "crit_alarm",
1259 .sbit = PB_IOUT_OC_FAULT,
1261 .reg = PMBUS_VIRT_READ_IOUT_AVG,
1265 .reg = PMBUS_VIRT_READ_IOUT_MIN,
1269 .reg = PMBUS_VIRT_READ_IOUT_MAX,
1273 .reg = PMBUS_VIRT_RESET_IOUT_HISTORY,
1274 .attr = "reset_history",
1278 static const struct pmbus_sensor_attr current_attributes[] = {
1280 .reg = PMBUS_READ_IIN,
1281 .class = PSC_CURRENT_IN,
1283 .func = PMBUS_HAVE_IIN,
1284 .sfunc = PMBUS_HAVE_STATUS_INPUT,
1285 .sbase = PB_STATUS_INPUT_BASE,
1286 .limit = iin_limit_attrs,
1287 .nlimit = ARRAY_SIZE(iin_limit_attrs),
1289 .reg = PMBUS_READ_IOUT,
1290 .class = PSC_CURRENT_OUT,
1293 .func = PMBUS_HAVE_IOUT,
1294 .sfunc = PMBUS_HAVE_STATUS_IOUT,
1295 .sbase = PB_STATUS_IOUT_BASE,
1296 .gbit = PB_STATUS_IOUT_OC,
1297 .limit = iout_limit_attrs,
1298 .nlimit = ARRAY_SIZE(iout_limit_attrs),
1302 /* Power attributes */
1304 static const struct pmbus_limit_attr pin_limit_attrs[] = {
1306 .reg = PMBUS_PIN_OP_WARN_LIMIT,
1309 .sbit = PB_PIN_OP_WARNING,
1311 .reg = PMBUS_VIRT_READ_PIN_AVG,
1315 .reg = PMBUS_VIRT_READ_PIN_MAX,
1317 .attr = "input_highest",
1319 .reg = PMBUS_VIRT_RESET_PIN_HISTORY,
1320 .attr = "reset_history",
1324 static const struct pmbus_limit_attr pout_limit_attrs[] = {
1326 .reg = PMBUS_POUT_MAX,
1328 .alarm = "cap_alarm",
1329 .sbit = PB_POWER_LIMITING,
1331 .reg = PMBUS_POUT_OP_WARN_LIMIT,
1333 .alarm = "max_alarm",
1334 .sbit = PB_POUT_OP_WARNING,
1336 .reg = PMBUS_POUT_OP_FAULT_LIMIT,
1338 .alarm = "crit_alarm",
1339 .sbit = PB_POUT_OP_FAULT,
1343 static const struct pmbus_sensor_attr power_attributes[] = {
1345 .reg = PMBUS_READ_PIN,
1348 .func = PMBUS_HAVE_PIN,
1349 .sfunc = PMBUS_HAVE_STATUS_INPUT,
1350 .sbase = PB_STATUS_INPUT_BASE,
1351 .limit = pin_limit_attrs,
1352 .nlimit = ARRAY_SIZE(pin_limit_attrs),
1354 .reg = PMBUS_READ_POUT,
1358 .func = PMBUS_HAVE_POUT,
1359 .sfunc = PMBUS_HAVE_STATUS_IOUT,
1360 .sbase = PB_STATUS_IOUT_BASE,
1361 .limit = pout_limit_attrs,
1362 .nlimit = ARRAY_SIZE(pout_limit_attrs),
1366 /* Temperature atributes */
1368 static const struct pmbus_limit_attr temp_limit_attrs[] = {
1370 .reg = PMBUS_UT_WARN_LIMIT,
1373 .alarm = "min_alarm",
1374 .sbit = PB_TEMP_UT_WARNING,
1376 .reg = PMBUS_UT_FAULT_LIMIT,
1379 .alarm = "lcrit_alarm",
1380 .sbit = PB_TEMP_UT_FAULT,
1382 .reg = PMBUS_OT_WARN_LIMIT,
1384 .alarm = "max_alarm",
1385 .sbit = PB_TEMP_OT_WARNING,
1387 .reg = PMBUS_OT_FAULT_LIMIT,
1389 .alarm = "crit_alarm",
1390 .sbit = PB_TEMP_OT_FAULT,
1392 .reg = PMBUS_VIRT_READ_TEMP_MIN,
1395 .reg = PMBUS_VIRT_READ_TEMP_MAX,
1398 .reg = PMBUS_VIRT_RESET_TEMP_HISTORY,
1399 .attr = "reset_history",
1403 static const struct pmbus_limit_attr temp_limit_attrs2[] = {
1405 .reg = PMBUS_UT_WARN_LIMIT,
1408 .alarm = "min_alarm",
1409 .sbit = PB_TEMP_UT_WARNING,
1411 .reg = PMBUS_UT_FAULT_LIMIT,
1414 .alarm = "lcrit_alarm",
1415 .sbit = PB_TEMP_UT_FAULT,
1417 .reg = PMBUS_OT_WARN_LIMIT,
1419 .alarm = "max_alarm",
1420 .sbit = PB_TEMP_OT_WARNING,
1422 .reg = PMBUS_OT_FAULT_LIMIT,
1424 .alarm = "crit_alarm",
1425 .sbit = PB_TEMP_OT_FAULT,
1427 .reg = PMBUS_VIRT_READ_TEMP2_MIN,
1430 .reg = PMBUS_VIRT_READ_TEMP2_MAX,
1433 .reg = PMBUS_VIRT_RESET_TEMP2_HISTORY,
1434 .attr = "reset_history",
1438 static const struct pmbus_limit_attr temp_limit_attrs3[] = {
1440 .reg = PMBUS_UT_WARN_LIMIT,
1443 .alarm = "min_alarm",
1444 .sbit = PB_TEMP_UT_WARNING,
1446 .reg = PMBUS_UT_FAULT_LIMIT,
1449 .alarm = "lcrit_alarm",
1450 .sbit = PB_TEMP_UT_FAULT,
1452 .reg = PMBUS_OT_WARN_LIMIT,
1454 .alarm = "max_alarm",
1455 .sbit = PB_TEMP_OT_WARNING,
1457 .reg = PMBUS_OT_FAULT_LIMIT,
1459 .alarm = "crit_alarm",
1460 .sbit = PB_TEMP_OT_FAULT,
1464 static const struct pmbus_sensor_attr temp_attributes[] = {
1466 .reg = PMBUS_READ_TEMPERATURE_1,
1467 .class = PSC_TEMPERATURE,
1471 .func = PMBUS_HAVE_TEMP,
1472 .sfunc = PMBUS_HAVE_STATUS_TEMP,
1473 .sbase = PB_STATUS_TEMP_BASE,
1474 .gbit = PB_STATUS_TEMPERATURE,
1475 .limit = temp_limit_attrs,
1476 .nlimit = ARRAY_SIZE(temp_limit_attrs),
1478 .reg = PMBUS_READ_TEMPERATURE_2,
1479 .class = PSC_TEMPERATURE,
1483 .func = PMBUS_HAVE_TEMP2,
1484 .sfunc = PMBUS_HAVE_STATUS_TEMP,
1485 .sbase = PB_STATUS_TEMP_BASE,
1486 .gbit = PB_STATUS_TEMPERATURE,
1487 .limit = temp_limit_attrs2,
1488 .nlimit = ARRAY_SIZE(temp_limit_attrs2),
1490 .reg = PMBUS_READ_TEMPERATURE_3,
1491 .class = PSC_TEMPERATURE,
1495 .func = PMBUS_HAVE_TEMP3,
1496 .sfunc = PMBUS_HAVE_STATUS_TEMP,
1497 .sbase = PB_STATUS_TEMP_BASE,
1498 .gbit = PB_STATUS_TEMPERATURE,
1499 .limit = temp_limit_attrs3,
1500 .nlimit = ARRAY_SIZE(temp_limit_attrs3),
1504 static const int pmbus_fan_registers[] = {
1505 PMBUS_READ_FAN_SPEED_1,
1506 PMBUS_READ_FAN_SPEED_2,
1507 PMBUS_READ_FAN_SPEED_3,
1508 PMBUS_READ_FAN_SPEED_4
1511 static const int pmbus_fan_config_registers[] = {
1512 PMBUS_FAN_CONFIG_12,
1513 PMBUS_FAN_CONFIG_12,
1514 PMBUS_FAN_CONFIG_34,
1518 static const int pmbus_fan_status_registers[] = {
1519 PMBUS_STATUS_FAN_12,
1520 PMBUS_STATUS_FAN_12,
1521 PMBUS_STATUS_FAN_34,
1525 static const u32 pmbus_fan_flags[] = {
1532 static const u32 pmbus_fan_status_flags[] = {
1533 PMBUS_HAVE_STATUS_FAN12,
1534 PMBUS_HAVE_STATUS_FAN12,
1535 PMBUS_HAVE_STATUS_FAN34,
1536 PMBUS_HAVE_STATUS_FAN34
1540 static void pmbus_add_fan_attributes(struct i2c_client *client,
1541 struct pmbus_data *data)
1543 const struct pmbus_driver_info *info = data->info;
1547 for (page = 0; page < info->pages; page++) {
1550 for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) {
1553 if (!(info->func[page] & pmbus_fan_flags[f]))
1556 if (!pmbus_check_word_register(client, page,
1557 pmbus_fan_registers[f]))
1561 * Skip fan if not installed.
1562 * Each fan configuration register covers multiple fans,
1563 * so we have to do some magic.
1565 regval = _pmbus_read_byte_data(client, page,
1566 pmbus_fan_config_registers[f]);
1568 (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4)))))
1571 pmbus_add_sensor(data, "fan", "input", index, page,
1572 pmbus_fan_registers[f], PSC_FAN, true,
1576 * Each fan status register covers multiple fans,
1577 * so we have to do some magic.
1579 if ((info->func[page] & pmbus_fan_status_flags[f]) &&
1580 pmbus_check_byte_register(client,
1581 page, pmbus_fan_status_registers[f])) {
1584 if (f > 1) /* fan 3, 4 */
1585 base = PB_STATUS_FAN34_BASE + page;
1587 base = PB_STATUS_FAN_BASE + page;
1588 pmbus_add_boolean_reg(data, "fan", "alarm",
1590 PB_FAN_FAN1_WARNING >> (f & 1));
1591 pmbus_add_boolean_reg(data, "fan", "fault",
1593 PB_FAN_FAN1_FAULT >> (f & 1));
1600 static void pmbus_find_attributes(struct i2c_client *client,
1601 struct pmbus_data *data)
1603 /* Voltage sensors */
1604 pmbus_add_sensor_attrs(client, data, "in", voltage_attributes,
1605 ARRAY_SIZE(voltage_attributes));
1607 /* Current sensors */
1608 pmbus_add_sensor_attrs(client, data, "curr", current_attributes,
1609 ARRAY_SIZE(current_attributes));
1612 pmbus_add_sensor_attrs(client, data, "power", power_attributes,
1613 ARRAY_SIZE(power_attributes));
1615 /* Temperature sensors */
1616 pmbus_add_sensor_attrs(client, data, "temp", temp_attributes,
1617 ARRAY_SIZE(temp_attributes));
1620 pmbus_add_fan_attributes(client, data);
1624 * Identify chip parameters.
1625 * This function is called for all chips.
1627 static int pmbus_identify_common(struct i2c_client *client,
1628 struct pmbus_data *data)
1632 if (pmbus_check_byte_register(client, 0, PMBUS_VOUT_MODE))
1633 vout_mode = _pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
1634 if (vout_mode >= 0 && vout_mode != 0xff) {
1636 * Not all chips support the VOUT_MODE command,
1637 * so a failure to read it is not an error.
1639 switch (vout_mode >> 5) {
1640 case 0: /* linear mode */
1641 if (data->info->format[PSC_VOLTAGE_OUT] != linear)
1644 data->exponent = ((s8)(vout_mode << 3)) >> 3;
1646 case 1: /* VID mode */
1647 if (data->info->format[PSC_VOLTAGE_OUT] != vid)
1650 case 2: /* direct mode */
1651 if (data->info->format[PSC_VOLTAGE_OUT] != direct)
1659 /* Determine maximum number of sensors, booleans, and labels */
1660 pmbus_find_max_attr(client, data);
1661 pmbus_clear_fault_page(client, 0);
1665 int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
1666 struct pmbus_driver_info *info)
1668 const struct pmbus_platform_data *pdata = client->dev.platform_data;
1669 struct pmbus_data *data;
1673 dev_err(&client->dev, "Missing chip information");
1677 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE
1678 | I2C_FUNC_SMBUS_BYTE_DATA
1679 | I2C_FUNC_SMBUS_WORD_DATA))
1682 data = kzalloc(sizeof(*data), GFP_KERNEL);
1684 dev_err(&client->dev, "No memory to allocate driver data\n");
1688 i2c_set_clientdata(client, data);
1689 mutex_init(&data->update_lock);
1691 /* Bail out if PMBus status register does not exist. */
1692 if (i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE) < 0) {
1693 dev_err(&client->dev, "PMBus status register not found\n");
1699 data->flags = pdata->flags;
1702 pmbus_clear_faults(client);
1704 if (info->identify) {
1705 ret = (*info->identify)(client, info);
1707 dev_err(&client->dev, "Chip identification failed\n");
1712 if (info->pages <= 0 || info->pages > PMBUS_PAGES) {
1713 dev_err(&client->dev, "Bad number of PMBus pages: %d\n",
1719 ret = pmbus_identify_common(client, data);
1721 dev_err(&client->dev, "Failed to identify chip capabilities\n");
1726 data->sensors = kzalloc(sizeof(struct pmbus_sensor) * data->max_sensors,
1728 if (!data->sensors) {
1729 dev_err(&client->dev, "No memory to allocate sensor data\n");
1733 data->booleans = kzalloc(sizeof(struct pmbus_boolean)
1734 * data->max_booleans, GFP_KERNEL);
1735 if (!data->booleans) {
1736 dev_err(&client->dev, "No memory to allocate boolean data\n");
1740 data->labels = kzalloc(sizeof(struct pmbus_label) * data->max_labels,
1742 if (!data->labels) {
1743 dev_err(&client->dev, "No memory to allocate label data\n");
1747 data->attributes = kzalloc(sizeof(struct attribute *)
1748 * data->max_attributes, GFP_KERNEL);
1749 if (!data->attributes) {
1750 dev_err(&client->dev, "No memory to allocate attribute data\n");
1754 pmbus_find_attributes(client, data);
1757 * If there are no attributes, something is wrong.
1758 * Bail out instead of trying to register nothing.
1760 if (!data->num_attributes) {
1761 dev_err(&client->dev, "No attributes found\n");
1763 goto out_attributes;
1766 /* Register sysfs hooks */
1767 data->group.attrs = data->attributes;
1768 ret = sysfs_create_group(&client->dev.kobj, &data->group);
1770 dev_err(&client->dev, "Failed to create sysfs entries\n");
1771 goto out_attributes;
1773 data->hwmon_dev = hwmon_device_register(&client->dev);
1774 if (IS_ERR(data->hwmon_dev)) {
1775 ret = PTR_ERR(data->hwmon_dev);
1776 dev_err(&client->dev, "Failed to register hwmon device\n");
1777 goto out_hwmon_device_register;
1781 out_hwmon_device_register:
1782 sysfs_remove_group(&client->dev.kobj, &data->group);
1784 kfree(data->attributes);
1786 kfree(data->labels);
1788 kfree(data->booleans);
1790 kfree(data->sensors);
1795 EXPORT_SYMBOL_GPL(pmbus_do_probe);
1797 void pmbus_do_remove(struct i2c_client *client)
1799 struct pmbus_data *data = i2c_get_clientdata(client);
1800 hwmon_device_unregister(data->hwmon_dev);
1801 sysfs_remove_group(&client->dev.kobj, &data->group);
1802 kfree(data->attributes);
1803 kfree(data->labels);
1804 kfree(data->booleans);
1805 kfree(data->sensors);
1808 EXPORT_SYMBOL_GPL(pmbus_do_remove);
1810 MODULE_AUTHOR("Guenter Roeck");
1811 MODULE_DESCRIPTION("PMBus core driver");
1812 MODULE_LICENSE("GPL");