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/module.h>
23 #include <linux/init.h>
24 #include <linux/err.h>
25 #include <linux/slab.h>
26 #include <linux/i2c.h>
27 #include <linux/hwmon.h>
28 #include <linux/hwmon-sysfs.h>
29 #include <linux/delay.h>
30 #include <linux/i2c/pmbus.h>
34 * Constants needed to determine number of sensors, booleans, and labels.
36 #define PMBUS_MAX_INPUT_SENSORS 22 /* 10*volt, 7*curr, 5*power */
37 #define PMBUS_VOUT_SENSORS_PER_PAGE 9 /* input, min, max, lcrit,
38 crit, lowest, highest, avg,
40 #define PMBUS_IOUT_SENSORS_PER_PAGE 8 /* input, min, max, crit,
43 #define PMBUS_POUT_SENSORS_PER_PAGE 7 /* input, cap, max, crit,
46 #define PMBUS_MAX_SENSORS_PER_FAN 1 /* input */
47 #define PMBUS_MAX_SENSORS_PER_TEMP 9 /* input, min, max, lcrit,
48 * crit, lowest, highest, avg,
52 #define PMBUS_MAX_INPUT_BOOLEANS 7 /* v: min_alarm, max_alarm,
53 lcrit_alarm, crit_alarm;
56 #define PMBUS_VOUT_BOOLEANS_PER_PAGE 4 /* min_alarm, max_alarm,
57 lcrit_alarm, crit_alarm */
58 #define PMBUS_IOUT_BOOLEANS_PER_PAGE 3 /* alarm, lcrit_alarm,
60 #define PMBUS_POUT_BOOLEANS_PER_PAGE 3 /* cap_alarm, alarm, crit_alarm
62 #define PMBUS_MAX_BOOLEANS_PER_FAN 2 /* alarm, fault */
63 #define PMBUS_MAX_BOOLEANS_PER_TEMP 4 /* min_alarm, max_alarm,
64 lcrit_alarm, crit_alarm */
66 #define PMBUS_MAX_INPUT_LABELS 4 /* vin, vcap, iin, pin */
69 * status, status_vout, status_iout, status_fans, status_fan34, and status_temp
70 * are paged. status_input is unpaged.
72 #define PB_NUM_STATUS_REG (PMBUS_PAGES * 6 + 1)
75 * Index into status register array, per status register group
77 #define PB_STATUS_BASE 0
78 #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES)
79 #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES)
80 #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES)
81 #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES)
82 #define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES)
83 #define PB_STATUS_TEMP_BASE (PB_STATUS_INPUT_BASE + 1)
85 #define PMBUS_NAME_SIZE 24
88 char name[PMBUS_NAME_SIZE]; /* sysfs sensor name */
89 struct sensor_device_attribute attribute;
90 u8 page; /* page number */
91 u16 reg; /* register */
92 enum pmbus_sensor_classes class; /* sensor class */
93 bool update; /* runtime sensor update needed */
94 int data; /* Sensor data.
95 Negative if there was a read error */
98 struct pmbus_boolean {
99 char name[PMBUS_NAME_SIZE]; /* sysfs boolean name */
100 struct sensor_device_attribute attribute;
104 char name[PMBUS_NAME_SIZE]; /* sysfs label name */
105 struct sensor_device_attribute attribute;
106 char label[PMBUS_NAME_SIZE]; /* label */
110 struct device *hwmon_dev;
112 u32 flags; /* from platform data */
114 int exponent; /* linear mode: exponent for output voltages */
116 const struct pmbus_driver_info *info;
120 struct attribute **attributes;
121 struct attribute_group group;
124 * Sensors cover both sensor and limit registers.
128 struct pmbus_sensor *sensors;
130 * Booleans are used for alarms.
131 * Values are determined from status registers.
135 struct pmbus_boolean *booleans;
137 * Labels are used to map generic names (e.g., "in1")
138 * to PMBus specific names (e.g., "vin" or "vout1").
142 struct pmbus_label *labels;
144 struct mutex update_lock;
146 unsigned long last_updated; /* in jiffies */
149 * A single status register covers multiple attributes,
150 * so we keep them all together.
152 u8 status[PB_NUM_STATUS_REG];
157 int pmbus_set_page(struct i2c_client *client, u8 page)
159 struct pmbus_data *data = i2c_get_clientdata(client);
163 if (page != data->currpage) {
164 rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
165 newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE);
169 data->currpage = page;
173 EXPORT_SYMBOL_GPL(pmbus_set_page);
175 int pmbus_write_byte(struct i2c_client *client, int page, u8 value)
180 rv = pmbus_set_page(client, page);
185 return i2c_smbus_write_byte(client, value);
187 EXPORT_SYMBOL_GPL(pmbus_write_byte);
190 * _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if
191 * a device specific mapping funcion exists and calls it if necessary.
193 static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value)
195 struct pmbus_data *data = i2c_get_clientdata(client);
196 const struct pmbus_driver_info *info = data->info;
199 if (info->write_byte) {
200 status = info->write_byte(client, page, value);
201 if (status != -ENODATA)
204 return pmbus_write_byte(client, page, value);
207 int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word)
211 rv = pmbus_set_page(client, page);
215 return i2c_smbus_write_word_data(client, reg, word);
217 EXPORT_SYMBOL_GPL(pmbus_write_word_data);
220 * _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if
221 * a device specific mapping function exists and calls it if necessary.
223 static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg,
226 struct pmbus_data *data = i2c_get_clientdata(client);
227 const struct pmbus_driver_info *info = data->info;
230 if (info->write_word_data) {
231 status = info->write_word_data(client, page, reg, word);
232 if (status != -ENODATA)
235 if (reg >= PMBUS_VIRT_BASE)
237 return pmbus_write_word_data(client, page, reg, word);
240 int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg)
244 rv = pmbus_set_page(client, page);
248 return i2c_smbus_read_word_data(client, reg);
250 EXPORT_SYMBOL_GPL(pmbus_read_word_data);
253 * _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if
254 * a device specific mapping function exists and calls it if necessary.
256 static int _pmbus_read_word_data(struct i2c_client *client, int page, int reg)
258 struct pmbus_data *data = i2c_get_clientdata(client);
259 const struct pmbus_driver_info *info = data->info;
262 if (info->read_word_data) {
263 status = info->read_word_data(client, page, reg);
264 if (status != -ENODATA)
267 if (reg >= PMBUS_VIRT_BASE)
269 return pmbus_read_word_data(client, page, reg);
272 int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg)
277 rv = pmbus_set_page(client, page);
282 return i2c_smbus_read_byte_data(client, reg);
284 EXPORT_SYMBOL_GPL(pmbus_read_byte_data);
287 * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if
288 * a device specific mapping function exists and calls it if necessary.
290 static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg)
292 struct pmbus_data *data = i2c_get_clientdata(client);
293 const struct pmbus_driver_info *info = data->info;
296 if (info->read_byte_data) {
297 status = info->read_byte_data(client, page, reg);
298 if (status != -ENODATA)
301 return pmbus_read_byte_data(client, page, reg);
304 static void pmbus_clear_fault_page(struct i2c_client *client, int page)
306 _pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
309 void pmbus_clear_faults(struct i2c_client *client)
311 struct pmbus_data *data = i2c_get_clientdata(client);
314 for (i = 0; i < data->info->pages; i++)
315 pmbus_clear_fault_page(client, i);
317 EXPORT_SYMBOL_GPL(pmbus_clear_faults);
319 static int pmbus_check_status_cml(struct i2c_client *client)
323 status = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_BYTE);
324 if (status < 0 || (status & PB_STATUS_CML)) {
325 status2 = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML);
326 if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND))
332 bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg)
335 struct pmbus_data *data = i2c_get_clientdata(client);
337 rv = _pmbus_read_byte_data(client, page, reg);
338 if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK))
339 rv = pmbus_check_status_cml(client);
340 pmbus_clear_fault_page(client, -1);
343 EXPORT_SYMBOL_GPL(pmbus_check_byte_register);
345 bool pmbus_check_word_register(struct i2c_client *client, int page, int reg)
348 struct pmbus_data *data = i2c_get_clientdata(client);
350 rv = _pmbus_read_word_data(client, page, reg);
351 if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK))
352 rv = pmbus_check_status_cml(client);
353 pmbus_clear_fault_page(client, -1);
356 EXPORT_SYMBOL_GPL(pmbus_check_word_register);
358 const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client)
360 struct pmbus_data *data = i2c_get_clientdata(client);
364 EXPORT_SYMBOL_GPL(pmbus_get_driver_info);
366 static struct pmbus_data *pmbus_update_device(struct device *dev)
368 struct i2c_client *client = to_i2c_client(dev);
369 struct pmbus_data *data = i2c_get_clientdata(client);
370 const struct pmbus_driver_info *info = data->info;
372 mutex_lock(&data->update_lock);
373 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
376 for (i = 0; i < info->pages; i++)
377 data->status[PB_STATUS_BASE + i]
378 = _pmbus_read_byte_data(client, i,
380 for (i = 0; i < info->pages; i++) {
381 if (!(info->func[i] & PMBUS_HAVE_STATUS_VOUT))
383 data->status[PB_STATUS_VOUT_BASE + i]
384 = _pmbus_read_byte_data(client, i, PMBUS_STATUS_VOUT);
386 for (i = 0; i < info->pages; i++) {
387 if (!(info->func[i] & PMBUS_HAVE_STATUS_IOUT))
389 data->status[PB_STATUS_IOUT_BASE + i]
390 = _pmbus_read_byte_data(client, i, PMBUS_STATUS_IOUT);
392 for (i = 0; i < info->pages; i++) {
393 if (!(info->func[i] & PMBUS_HAVE_STATUS_TEMP))
395 data->status[PB_STATUS_TEMP_BASE + i]
396 = _pmbus_read_byte_data(client, i,
397 PMBUS_STATUS_TEMPERATURE);
399 for (i = 0; i < info->pages; i++) {
400 if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN12))
402 data->status[PB_STATUS_FAN_BASE + i]
403 = _pmbus_read_byte_data(client, i,
404 PMBUS_STATUS_FAN_12);
407 for (i = 0; i < info->pages; i++) {
408 if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN34))
410 data->status[PB_STATUS_FAN34_BASE + i]
411 = _pmbus_read_byte_data(client, i,
412 PMBUS_STATUS_FAN_34);
415 if (info->func[0] & PMBUS_HAVE_STATUS_INPUT)
416 data->status[PB_STATUS_INPUT_BASE]
417 = _pmbus_read_byte_data(client, 0,
420 for (i = 0; i < data->num_sensors; i++) {
421 struct pmbus_sensor *sensor = &data->sensors[i];
423 if (!data->valid || sensor->update)
425 = _pmbus_read_word_data(client,
429 pmbus_clear_faults(client);
430 data->last_updated = jiffies;
433 mutex_unlock(&data->update_lock);
438 * Convert linear sensor values to milli- or micro-units
439 * depending on sensor type.
441 static long pmbus_reg2data_linear(struct pmbus_data *data,
442 struct pmbus_sensor *sensor)
448 if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */
449 exponent = data->exponent;
450 mantissa = (u16) sensor->data;
451 } else { /* LINEAR11 */
452 exponent = ((s16)sensor->data) >> 11;
453 mantissa = ((s16)((sensor->data & 0x7ff) << 5)) >> 5;
458 /* scale result to milli-units for all sensors except fans */
459 if (sensor->class != PSC_FAN)
462 /* scale result to micro-units for power sensors */
463 if (sensor->class == PSC_POWER)
475 * Convert direct sensor values to milli- or micro-units
476 * depending on sensor type.
478 static long pmbus_reg2data_direct(struct pmbus_data *data,
479 struct pmbus_sensor *sensor)
481 long val = (s16) sensor->data;
484 m = data->info->m[sensor->class];
485 b = data->info->b[sensor->class];
486 R = data->info->R[sensor->class];
491 /* X = 1/m * (Y * 10^-R - b) */
493 /* scale result to milli-units for everything but fans */
494 if (sensor->class != PSC_FAN) {
499 /* scale result to micro-units for power sensors */
500 if (sensor->class == PSC_POWER) {
510 val = DIV_ROUND_CLOSEST(val, 10);
514 return (val - b) / m;
518 * Convert VID sensor values to milli- or micro-units
519 * depending on sensor type.
520 * We currently only support VR11.
522 static long pmbus_reg2data_vid(struct pmbus_data *data,
523 struct pmbus_sensor *sensor)
525 long val = sensor->data;
527 if (val < 0x02 || val > 0xb2)
529 return DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100);
532 static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)
536 switch (data->info->format[sensor->class]) {
538 val = pmbus_reg2data_direct(data, sensor);
541 val = pmbus_reg2data_vid(data, sensor);
545 val = pmbus_reg2data_linear(data, sensor);
551 #define MAX_MANTISSA (1023 * 1000)
552 #define MIN_MANTISSA (511 * 1000)
554 static u16 pmbus_data2reg_linear(struct pmbus_data *data,
555 enum pmbus_sensor_classes class, long val)
557 s16 exponent = 0, mantissa;
558 bool negative = false;
564 if (class == PSC_VOLTAGE_OUT) {
565 /* LINEAR16 does not support negative voltages */
570 * For a static exponents, we don't have a choice
571 * but to adjust the value to it.
573 if (data->exponent < 0)
574 val <<= -data->exponent;
576 val >>= data->exponent;
577 val = DIV_ROUND_CLOSEST(val, 1000);
586 /* Power is in uW. Convert to mW before converting. */
587 if (class == PSC_POWER)
588 val = DIV_ROUND_CLOSEST(val, 1000L);
591 * For simplicity, convert fan data to milli-units
592 * before calculating the exponent.
594 if (class == PSC_FAN)
597 /* Reduce large mantissa until it fits into 10 bit */
598 while (val >= MAX_MANTISSA && exponent < 15) {
602 /* Increase small mantissa to improve precision */
603 while (val < MIN_MANTISSA && exponent > -15) {
608 /* Convert mantissa from milli-units to units */
609 mantissa = DIV_ROUND_CLOSEST(val, 1000);
611 /* Ensure that resulting number is within range */
612 if (mantissa > 0x3ff)
617 mantissa = -mantissa;
619 /* Convert to 5 bit exponent, 11 bit mantissa */
620 return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800);
623 static u16 pmbus_data2reg_direct(struct pmbus_data *data,
624 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 */
650 val = DIV_ROUND_CLOSEST(val, 10);
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 (kstrtol(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,
1341 .reg = PMBUS_VIRT_READ_POUT_AVG,
1345 .reg = PMBUS_VIRT_READ_POUT_MAX,
1347 .attr = "input_highest",
1349 .reg = PMBUS_VIRT_RESET_POUT_HISTORY,
1350 .attr = "reset_history",
1354 static const struct pmbus_sensor_attr power_attributes[] = {
1356 .reg = PMBUS_READ_PIN,
1359 .func = PMBUS_HAVE_PIN,
1360 .sfunc = PMBUS_HAVE_STATUS_INPUT,
1361 .sbase = PB_STATUS_INPUT_BASE,
1362 .limit = pin_limit_attrs,
1363 .nlimit = ARRAY_SIZE(pin_limit_attrs),
1365 .reg = PMBUS_READ_POUT,
1369 .func = PMBUS_HAVE_POUT,
1370 .sfunc = PMBUS_HAVE_STATUS_IOUT,
1371 .sbase = PB_STATUS_IOUT_BASE,
1372 .limit = pout_limit_attrs,
1373 .nlimit = ARRAY_SIZE(pout_limit_attrs),
1377 /* Temperature atributes */
1379 static const struct pmbus_limit_attr temp_limit_attrs[] = {
1381 .reg = PMBUS_UT_WARN_LIMIT,
1384 .alarm = "min_alarm",
1385 .sbit = PB_TEMP_UT_WARNING,
1387 .reg = PMBUS_UT_FAULT_LIMIT,
1390 .alarm = "lcrit_alarm",
1391 .sbit = PB_TEMP_UT_FAULT,
1393 .reg = PMBUS_OT_WARN_LIMIT,
1395 .alarm = "max_alarm",
1396 .sbit = PB_TEMP_OT_WARNING,
1398 .reg = PMBUS_OT_FAULT_LIMIT,
1400 .alarm = "crit_alarm",
1401 .sbit = PB_TEMP_OT_FAULT,
1403 .reg = PMBUS_VIRT_READ_TEMP_MIN,
1406 .reg = PMBUS_VIRT_READ_TEMP_AVG,
1409 .reg = PMBUS_VIRT_READ_TEMP_MAX,
1412 .reg = PMBUS_VIRT_RESET_TEMP_HISTORY,
1413 .attr = "reset_history",
1417 static const struct pmbus_limit_attr temp_limit_attrs2[] = {
1419 .reg = PMBUS_UT_WARN_LIMIT,
1422 .alarm = "min_alarm",
1423 .sbit = PB_TEMP_UT_WARNING,
1425 .reg = PMBUS_UT_FAULT_LIMIT,
1428 .alarm = "lcrit_alarm",
1429 .sbit = PB_TEMP_UT_FAULT,
1431 .reg = PMBUS_OT_WARN_LIMIT,
1433 .alarm = "max_alarm",
1434 .sbit = PB_TEMP_OT_WARNING,
1436 .reg = PMBUS_OT_FAULT_LIMIT,
1438 .alarm = "crit_alarm",
1439 .sbit = PB_TEMP_OT_FAULT,
1441 .reg = PMBUS_VIRT_READ_TEMP2_MIN,
1444 .reg = PMBUS_VIRT_READ_TEMP2_AVG,
1447 .reg = PMBUS_VIRT_READ_TEMP2_MAX,
1450 .reg = PMBUS_VIRT_RESET_TEMP2_HISTORY,
1451 .attr = "reset_history",
1455 static const struct pmbus_limit_attr temp_limit_attrs3[] = {
1457 .reg = PMBUS_UT_WARN_LIMIT,
1460 .alarm = "min_alarm",
1461 .sbit = PB_TEMP_UT_WARNING,
1463 .reg = PMBUS_UT_FAULT_LIMIT,
1466 .alarm = "lcrit_alarm",
1467 .sbit = PB_TEMP_UT_FAULT,
1469 .reg = PMBUS_OT_WARN_LIMIT,
1471 .alarm = "max_alarm",
1472 .sbit = PB_TEMP_OT_WARNING,
1474 .reg = PMBUS_OT_FAULT_LIMIT,
1476 .alarm = "crit_alarm",
1477 .sbit = PB_TEMP_OT_FAULT,
1481 static const struct pmbus_sensor_attr temp_attributes[] = {
1483 .reg = PMBUS_READ_TEMPERATURE_1,
1484 .class = PSC_TEMPERATURE,
1488 .func = PMBUS_HAVE_TEMP,
1489 .sfunc = PMBUS_HAVE_STATUS_TEMP,
1490 .sbase = PB_STATUS_TEMP_BASE,
1491 .gbit = PB_STATUS_TEMPERATURE,
1492 .limit = temp_limit_attrs,
1493 .nlimit = ARRAY_SIZE(temp_limit_attrs),
1495 .reg = PMBUS_READ_TEMPERATURE_2,
1496 .class = PSC_TEMPERATURE,
1500 .func = PMBUS_HAVE_TEMP2,
1501 .sfunc = PMBUS_HAVE_STATUS_TEMP,
1502 .sbase = PB_STATUS_TEMP_BASE,
1503 .gbit = PB_STATUS_TEMPERATURE,
1504 .limit = temp_limit_attrs2,
1505 .nlimit = ARRAY_SIZE(temp_limit_attrs2),
1507 .reg = PMBUS_READ_TEMPERATURE_3,
1508 .class = PSC_TEMPERATURE,
1512 .func = PMBUS_HAVE_TEMP3,
1513 .sfunc = PMBUS_HAVE_STATUS_TEMP,
1514 .sbase = PB_STATUS_TEMP_BASE,
1515 .gbit = PB_STATUS_TEMPERATURE,
1516 .limit = temp_limit_attrs3,
1517 .nlimit = ARRAY_SIZE(temp_limit_attrs3),
1521 static const int pmbus_fan_registers[] = {
1522 PMBUS_READ_FAN_SPEED_1,
1523 PMBUS_READ_FAN_SPEED_2,
1524 PMBUS_READ_FAN_SPEED_3,
1525 PMBUS_READ_FAN_SPEED_4
1528 static const int pmbus_fan_config_registers[] = {
1529 PMBUS_FAN_CONFIG_12,
1530 PMBUS_FAN_CONFIG_12,
1531 PMBUS_FAN_CONFIG_34,
1535 static const int pmbus_fan_status_registers[] = {
1536 PMBUS_STATUS_FAN_12,
1537 PMBUS_STATUS_FAN_12,
1538 PMBUS_STATUS_FAN_34,
1542 static const u32 pmbus_fan_flags[] = {
1549 static const u32 pmbus_fan_status_flags[] = {
1550 PMBUS_HAVE_STATUS_FAN12,
1551 PMBUS_HAVE_STATUS_FAN12,
1552 PMBUS_HAVE_STATUS_FAN34,
1553 PMBUS_HAVE_STATUS_FAN34
1557 static void pmbus_add_fan_attributes(struct i2c_client *client,
1558 struct pmbus_data *data)
1560 const struct pmbus_driver_info *info = data->info;
1564 for (page = 0; page < info->pages; page++) {
1567 for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) {
1570 if (!(info->func[page] & pmbus_fan_flags[f]))
1573 if (!pmbus_check_word_register(client, page,
1574 pmbus_fan_registers[f]))
1578 * Skip fan if not installed.
1579 * Each fan configuration register covers multiple fans,
1580 * so we have to do some magic.
1582 regval = _pmbus_read_byte_data(client, page,
1583 pmbus_fan_config_registers[f]);
1585 (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4)))))
1588 pmbus_add_sensor(data, "fan", "input", index, page,
1589 pmbus_fan_registers[f], PSC_FAN, true,
1593 * Each fan status register covers multiple fans,
1594 * so we have to do some magic.
1596 if ((info->func[page] & pmbus_fan_status_flags[f]) &&
1597 pmbus_check_byte_register(client,
1598 page, pmbus_fan_status_registers[f])) {
1601 if (f > 1) /* fan 3, 4 */
1602 base = PB_STATUS_FAN34_BASE + page;
1604 base = PB_STATUS_FAN_BASE + page;
1605 pmbus_add_boolean_reg(data, "fan", "alarm",
1607 PB_FAN_FAN1_WARNING >> (f & 1));
1608 pmbus_add_boolean_reg(data, "fan", "fault",
1610 PB_FAN_FAN1_FAULT >> (f & 1));
1617 static void pmbus_find_attributes(struct i2c_client *client,
1618 struct pmbus_data *data)
1620 /* Voltage sensors */
1621 pmbus_add_sensor_attrs(client, data, "in", voltage_attributes,
1622 ARRAY_SIZE(voltage_attributes));
1624 /* Current sensors */
1625 pmbus_add_sensor_attrs(client, data, "curr", current_attributes,
1626 ARRAY_SIZE(current_attributes));
1629 pmbus_add_sensor_attrs(client, data, "power", power_attributes,
1630 ARRAY_SIZE(power_attributes));
1632 /* Temperature sensors */
1633 pmbus_add_sensor_attrs(client, data, "temp", temp_attributes,
1634 ARRAY_SIZE(temp_attributes));
1637 pmbus_add_fan_attributes(client, data);
1641 * Identify chip parameters.
1642 * This function is called for all chips.
1644 static int pmbus_identify_common(struct i2c_client *client,
1645 struct pmbus_data *data)
1649 if (pmbus_check_byte_register(client, 0, PMBUS_VOUT_MODE))
1650 vout_mode = _pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
1651 if (vout_mode >= 0 && vout_mode != 0xff) {
1653 * Not all chips support the VOUT_MODE command,
1654 * so a failure to read it is not an error.
1656 switch (vout_mode >> 5) {
1657 case 0: /* linear mode */
1658 if (data->info->format[PSC_VOLTAGE_OUT] != linear)
1661 data->exponent = ((s8)(vout_mode << 3)) >> 3;
1663 case 1: /* VID mode */
1664 if (data->info->format[PSC_VOLTAGE_OUT] != vid)
1667 case 2: /* direct mode */
1668 if (data->info->format[PSC_VOLTAGE_OUT] != direct)
1676 /* Determine maximum number of sensors, booleans, and labels */
1677 pmbus_find_max_attr(client, data);
1678 pmbus_clear_fault_page(client, 0);
1682 int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
1683 struct pmbus_driver_info *info)
1685 const struct pmbus_platform_data *pdata = client->dev.platform_data;
1686 struct pmbus_data *data;
1690 dev_err(&client->dev, "Missing chip information");
1694 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE
1695 | I2C_FUNC_SMBUS_BYTE_DATA
1696 | I2C_FUNC_SMBUS_WORD_DATA))
1699 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
1701 dev_err(&client->dev, "No memory to allocate driver data\n");
1705 i2c_set_clientdata(client, data);
1706 mutex_init(&data->update_lock);
1708 /* Bail out if PMBus status register does not exist. */
1709 if (i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE) < 0) {
1710 dev_err(&client->dev, "PMBus status register not found\n");
1715 data->flags = pdata->flags;
1718 pmbus_clear_faults(client);
1720 if (info->identify) {
1721 ret = (*info->identify)(client, info);
1723 dev_err(&client->dev, "Chip identification failed\n");
1728 if (info->pages <= 0 || info->pages > PMBUS_PAGES) {
1729 dev_err(&client->dev, "Bad number of PMBus pages: %d\n",
1734 ret = pmbus_identify_common(client, data);
1736 dev_err(&client->dev, "Failed to identify chip capabilities\n");
1741 data->sensors = devm_kzalloc(&client->dev, sizeof(struct pmbus_sensor)
1742 * data->max_sensors, GFP_KERNEL);
1743 if (!data->sensors) {
1744 dev_err(&client->dev, "No memory to allocate sensor data\n");
1748 data->booleans = devm_kzalloc(&client->dev, sizeof(struct pmbus_boolean)
1749 * data->max_booleans, GFP_KERNEL);
1750 if (!data->booleans) {
1751 dev_err(&client->dev, "No memory to allocate boolean data\n");
1755 data->labels = devm_kzalloc(&client->dev, sizeof(struct pmbus_label)
1756 * data->max_labels, GFP_KERNEL);
1757 if (!data->labels) {
1758 dev_err(&client->dev, "No memory to allocate label data\n");
1762 data->attributes = devm_kzalloc(&client->dev, sizeof(struct attribute *)
1763 * data->max_attributes, GFP_KERNEL);
1764 if (!data->attributes) {
1765 dev_err(&client->dev, "No memory to allocate attribute data\n");
1769 pmbus_find_attributes(client, data);
1772 * If there are no attributes, something is wrong.
1773 * Bail out instead of trying to register nothing.
1775 if (!data->num_attributes) {
1776 dev_err(&client->dev, "No attributes found\n");
1780 /* Register sysfs hooks */
1781 data->group.attrs = data->attributes;
1782 ret = sysfs_create_group(&client->dev.kobj, &data->group);
1784 dev_err(&client->dev, "Failed to create sysfs entries\n");
1787 data->hwmon_dev = hwmon_device_register(&client->dev);
1788 if (IS_ERR(data->hwmon_dev)) {
1789 ret = PTR_ERR(data->hwmon_dev);
1790 dev_err(&client->dev, "Failed to register hwmon device\n");
1791 goto out_hwmon_device_register;
1795 out_hwmon_device_register:
1796 sysfs_remove_group(&client->dev.kobj, &data->group);
1799 EXPORT_SYMBOL_GPL(pmbus_do_probe);
1801 int pmbus_do_remove(struct i2c_client *client)
1803 struct pmbus_data *data = i2c_get_clientdata(client);
1804 hwmon_device_unregister(data->hwmon_dev);
1805 sysfs_remove_group(&client->dev.kobj, &data->group);
1808 EXPORT_SYMBOL_GPL(pmbus_do_remove);
1810 MODULE_AUTHOR("Guenter Roeck");
1811 MODULE_DESCRIPTION("PMBus core driver");
1812 MODULE_LICENSE("GPL");