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 11 /* 6*volt, 3*curr, 2*power */
37 #define PMBUS_VOUT_SENSORS_PER_PAGE 5 /* input, min, max, lcrit,
39 #define PMBUS_IOUT_SENSORS_PER_PAGE 4 /* input, min, max, crit */
40 #define PMBUS_POUT_SENSORS_PER_PAGE 4 /* input, cap, max, crit */
41 #define PMBUS_MAX_SENSORS_PER_FAN 1 /* input */
42 #define PMBUS_MAX_SENSORS_PER_TEMP 5 /* input, min, max, lcrit,
45 #define PMBUS_MAX_INPUT_BOOLEANS 7 /* v: min_alarm, max_alarm,
46 lcrit_alarm, crit_alarm;
49 #define PMBUS_VOUT_BOOLEANS_PER_PAGE 4 /* min_alarm, max_alarm,
50 lcrit_alarm, crit_alarm */
51 #define PMBUS_IOUT_BOOLEANS_PER_PAGE 3 /* alarm, lcrit_alarm,
53 #define PMBUS_POUT_BOOLEANS_PER_PAGE 2 /* alarm, crit_alarm */
54 #define PMBUS_MAX_BOOLEANS_PER_FAN 2 /* alarm, fault */
55 #define PMBUS_MAX_BOOLEANS_PER_TEMP 4 /* min_alarm, max_alarm,
56 lcrit_alarm, crit_alarm */
58 #define PMBUS_MAX_INPUT_LABELS 4 /* vin, vcap, iin, pin */
61 * status, status_vout, status_iout, status_fans, status_fan34, and status_temp
62 * are paged. status_input is unpaged.
64 #define PB_NUM_STATUS_REG (PMBUS_PAGES * 6 + 1)
67 * Index into status register array, per status register group
69 #define PB_STATUS_BASE 0
70 #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES)
71 #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES)
72 #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES)
73 #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES)
74 #define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES)
75 #define PB_STATUS_TEMP_BASE (PB_STATUS_INPUT_BASE + 1)
78 char name
[I2C_NAME_SIZE
]; /* sysfs sensor name */
79 struct sensor_device_attribute attribute
;
80 u8 page
; /* page number */
81 u8 reg
; /* register */
82 enum pmbus_sensor_classes
class; /* sensor class */
83 bool update
; /* runtime sensor update needed */
84 int data
; /* Sensor data.
85 Negative if there was a read error */
88 struct pmbus_boolean
{
89 char name
[I2C_NAME_SIZE
]; /* sysfs boolean name */
90 struct sensor_device_attribute attribute
;
94 char name
[I2C_NAME_SIZE
]; /* sysfs label name */
95 struct sensor_device_attribute attribute
;
96 char label
[I2C_NAME_SIZE
]; /* label */
100 struct device
*hwmon_dev
;
102 u32 flags
; /* from platform data */
104 int exponent
; /* linear mode: exponent for output voltages */
106 const struct pmbus_driver_info
*info
;
110 struct attribute
**attributes
;
111 struct attribute_group group
;
114 * Sensors cover both sensor and limit registers.
118 struct pmbus_sensor
*sensors
;
120 * Booleans are used for alarms.
121 * Values are determined from status registers.
125 struct pmbus_boolean
*booleans
;
127 * Labels are used to map generic names (e.g., "in1")
128 * to PMBus specific names (e.g., "vin" or "vout1").
132 struct pmbus_label
*labels
;
134 struct mutex update_lock
;
136 unsigned long last_updated
; /* in jiffies */
139 * A single status register covers multiple attributes,
140 * so we keep them all together.
143 u8 status
[PB_NUM_STATUS_REG
];
148 int pmbus_set_page(struct i2c_client
*client
, u8 page
)
150 struct pmbus_data
*data
= i2c_get_clientdata(client
);
154 if (page
!= data
->currpage
) {
155 rv
= i2c_smbus_write_byte_data(client
, PMBUS_PAGE
, page
);
156 newpage
= i2c_smbus_read_byte_data(client
, PMBUS_PAGE
);
160 data
->currpage
= page
;
164 EXPORT_SYMBOL_GPL(pmbus_set_page
);
166 static int pmbus_write_byte(struct i2c_client
*client
, u8 page
, u8 value
)
170 rv
= pmbus_set_page(client
, page
);
174 return i2c_smbus_write_byte(client
, value
);
177 static int pmbus_write_word_data(struct i2c_client
*client
, u8 page
, u8 reg
,
182 rv
= pmbus_set_page(client
, page
);
186 return i2c_smbus_write_word_data(client
, reg
, word
);
189 int pmbus_read_word_data(struct i2c_client
*client
, u8 page
, u8 reg
)
193 rv
= pmbus_set_page(client
, page
);
197 return i2c_smbus_read_word_data(client
, reg
);
199 EXPORT_SYMBOL_GPL(pmbus_read_word_data
);
201 static int pmbus_read_byte_data(struct i2c_client
*client
, u8 page
, u8 reg
)
205 rv
= pmbus_set_page(client
, page
);
209 return i2c_smbus_read_byte_data(client
, reg
);
212 static void pmbus_clear_fault_page(struct i2c_client
*client
, int page
)
214 pmbus_write_byte(client
, page
, PMBUS_CLEAR_FAULTS
);
217 void pmbus_clear_faults(struct i2c_client
*client
)
219 struct pmbus_data
*data
= i2c_get_clientdata(client
);
222 for (i
= 0; i
< data
->info
->pages
; i
++)
223 pmbus_clear_fault_page(client
, i
);
225 EXPORT_SYMBOL_GPL(pmbus_clear_faults
);
227 static int pmbus_check_status_cml(struct i2c_client
*client
, int page
)
231 status
= pmbus_read_byte_data(client
, page
, PMBUS_STATUS_BYTE
);
232 if (status
< 0 || (status
& PB_STATUS_CML
)) {
233 status2
= pmbus_read_byte_data(client
, page
, PMBUS_STATUS_CML
);
234 if (status2
< 0 || (status2
& PB_CML_FAULT_INVALID_COMMAND
))
240 bool pmbus_check_byte_register(struct i2c_client
*client
, int page
, int reg
)
243 struct pmbus_data
*data
= i2c_get_clientdata(client
);
245 rv
= pmbus_read_byte_data(client
, page
, reg
);
246 if (rv
>= 0 && !(data
->flags
& PMBUS_SKIP_STATUS_CHECK
))
247 rv
= pmbus_check_status_cml(client
, page
);
248 pmbus_clear_fault_page(client
, page
);
251 EXPORT_SYMBOL_GPL(pmbus_check_byte_register
);
253 bool pmbus_check_word_register(struct i2c_client
*client
, int page
, int reg
)
256 struct pmbus_data
*data
= i2c_get_clientdata(client
);
258 rv
= pmbus_read_word_data(client
, page
, reg
);
259 if (rv
>= 0 && !(data
->flags
& PMBUS_SKIP_STATUS_CHECK
))
260 rv
= pmbus_check_status_cml(client
, page
);
261 pmbus_clear_fault_page(client
, page
);
264 EXPORT_SYMBOL_GPL(pmbus_check_word_register
);
266 const struct pmbus_driver_info
*pmbus_get_driver_info(struct i2c_client
*client
)
268 struct pmbus_data
*data
= i2c_get_clientdata(client
);
272 EXPORT_SYMBOL_GPL(pmbus_get_driver_info
);
274 static int pmbus_get_status(struct i2c_client
*client
, int page
, int reg
)
276 struct pmbus_data
*data
= i2c_get_clientdata(client
);
277 const struct pmbus_driver_info
*info
= data
->info
;
280 if (info
->get_status
) {
281 status
= info
->get_status(client
, page
, reg
);
282 if (status
!= -ENODATA
)
285 return pmbus_read_byte_data(client
, page
, reg
);
288 static struct pmbus_data
*pmbus_update_device(struct device
*dev
)
290 struct i2c_client
*client
= to_i2c_client(dev
);
291 struct pmbus_data
*data
= i2c_get_clientdata(client
);
292 const struct pmbus_driver_info
*info
= data
->info
;
294 mutex_lock(&data
->update_lock
);
295 if (time_after(jiffies
, data
->last_updated
+ HZ
) || !data
->valid
) {
298 for (i
= 0; i
< info
->pages
; i
++)
299 data
->status
[PB_STATUS_BASE
+ i
]
300 = pmbus_read_byte_data(client
, i
,
302 for (i
= 0; i
< info
->pages
; i
++) {
303 if (!(info
->func
[i
] & PMBUS_HAVE_STATUS_VOUT
))
305 data
->status
[PB_STATUS_VOUT_BASE
+ i
]
306 = pmbus_get_status(client
, i
, PMBUS_STATUS_VOUT
);
308 for (i
= 0; i
< info
->pages
; i
++) {
309 if (!(info
->func
[i
] & PMBUS_HAVE_STATUS_IOUT
))
311 data
->status
[PB_STATUS_IOUT_BASE
+ i
]
312 = pmbus_get_status(client
, i
, PMBUS_STATUS_IOUT
);
314 for (i
= 0; i
< info
->pages
; i
++) {
315 if (!(info
->func
[i
] & PMBUS_HAVE_STATUS_TEMP
))
317 data
->status
[PB_STATUS_TEMP_BASE
+ i
]
318 = pmbus_get_status(client
, i
,
319 PMBUS_STATUS_TEMPERATURE
);
321 for (i
= 0; i
< info
->pages
; i
++) {
322 if (!(info
->func
[i
] & PMBUS_HAVE_STATUS_FAN12
))
324 data
->status
[PB_STATUS_FAN_BASE
+ i
]
325 = pmbus_get_status(client
, i
, PMBUS_STATUS_FAN_12
);
328 for (i
= 0; i
< info
->pages
; i
++) {
329 if (!(info
->func
[i
] & PMBUS_HAVE_STATUS_FAN34
))
331 data
->status
[PB_STATUS_FAN34_BASE
+ i
]
332 = pmbus_get_status(client
, i
, PMBUS_STATUS_FAN_34
);
335 if (info
->func
[0] & PMBUS_HAVE_STATUS_INPUT
)
336 data
->status
[PB_STATUS_INPUT_BASE
]
337 = pmbus_get_status(client
, 0, PMBUS_STATUS_INPUT
);
339 for (i
= 0; i
< data
->num_sensors
; i
++) {
340 struct pmbus_sensor
*sensor
= &data
->sensors
[i
];
342 if (!data
->valid
|| sensor
->update
)
344 = pmbus_read_word_data(client
, sensor
->page
,
347 pmbus_clear_faults(client
);
348 data
->last_updated
= jiffies
;
351 mutex_unlock(&data
->update_lock
);
356 * Convert linear sensor values to milli- or micro-units
357 * depending on sensor type.
359 static int pmbus_reg2data_linear(struct pmbus_data
*data
,
360 struct pmbus_sensor
*sensor
)
362 s16 exponent
, mantissa
;
365 if (sensor
->class == PSC_VOLTAGE_OUT
) {
366 exponent
= data
->exponent
;
367 mantissa
= (s16
) sensor
->data
;
369 exponent
= (sensor
->data
>> 11) & 0x001f;
370 mantissa
= sensor
->data
& 0x07ff;
373 exponent
|= 0xffe0; /* sign extend exponent */
374 if (mantissa
> 0x03ff)
375 mantissa
|= 0xf800; /* sign extend mantissa */
380 /* scale result to milli-units for all sensors except fans */
381 if (sensor
->class != PSC_FAN
)
384 /* scale result to micro-units for power sensors */
385 if (sensor
->class == PSC_POWER
)
397 * Convert direct sensor values to milli- or micro-units
398 * depending on sensor type.
400 static int pmbus_reg2data_direct(struct pmbus_data
*data
,
401 struct pmbus_sensor
*sensor
)
403 long val
= (s16
) sensor
->data
;
406 m
= data
->info
->m
[sensor
->class];
407 b
= data
->info
->b
[sensor
->class];
408 R
= data
->info
->R
[sensor
->class];
413 /* X = 1/m * (Y * 10^-R - b) */
415 /* scale result to milli-units for everything but fans */
416 if (sensor
->class != PSC_FAN
) {
421 /* scale result to micro-units for power sensors */
422 if (sensor
->class == PSC_POWER
) {
432 val
= DIV_ROUND_CLOSEST(val
, 10);
436 return (int)((val
- b
) / m
);
439 static int pmbus_reg2data(struct pmbus_data
*data
, struct pmbus_sensor
*sensor
)
443 if (data
->info
->direct
[sensor
->class])
444 val
= pmbus_reg2data_direct(data
, sensor
);
446 val
= pmbus_reg2data_linear(data
, sensor
);
451 #define MAX_MANTISSA (1023 * 1000)
452 #define MIN_MANTISSA (511 * 1000)
454 static u16
pmbus_data2reg_linear(struct pmbus_data
*data
,
455 enum pmbus_sensor_classes
class, long val
)
457 s16 exponent
= 0, mantissa
= 0;
458 bool negative
= false;
469 if (class == PSC_VOLTAGE_OUT
) {
471 * For a static exponents, we don't have a choice
472 * but to adjust the value to it.
474 if (data
->exponent
< 0)
475 val
<<= -data
->exponent
;
477 val
>>= data
->exponent
;
478 val
= DIV_ROUND_CLOSEST(val
, 1000);
481 return negative
? -val
: val
;
484 /* Power is in uW. Convert to mW before converting. */
485 if (class == PSC_POWER
)
486 val
= DIV_ROUND_CLOSEST(val
, 1000L);
489 * For simplicity, convert fan data to milli-units
490 * before calculating the exponent.
492 if (class == PSC_FAN
)
495 /* Reduce large mantissa until it fits into 10 bit */
496 while (val
>= MAX_MANTISSA
&& exponent
< 15) {
500 /* Increase small mantissa to improve precision */
501 while (val
< MIN_MANTISSA
&& exponent
> -15) {
506 /* Convert mantissa from milli-units to units */
507 mantissa
= DIV_ROUND_CLOSEST(val
, 1000);
509 /* Ensure that resulting number is within range */
510 if (mantissa
> 0x3ff)
515 mantissa
= -mantissa
;
517 /* Convert to 5 bit exponent, 11 bit mantissa */
518 return (mantissa
& 0x7ff) | ((exponent
<< 11) & 0xf800);
521 static u16
pmbus_data2reg_direct(struct pmbus_data
*data
,
522 enum pmbus_sensor_classes
class, long val
)
526 m
= data
->info
->m
[class];
527 b
= data
->info
->b
[class];
528 R
= data
->info
->R
[class];
530 /* Power is in uW. Adjust R and b. */
531 if (class == PSC_POWER
) {
536 /* Calculate Y = (m * X + b) * 10^R */
537 if (class != PSC_FAN
) {
538 R
-= 3; /* Adjust R and b for data in milli-units */
548 val
= DIV_ROUND_CLOSEST(val
, 10);
555 static u16
pmbus_data2reg(struct pmbus_data
*data
,
556 enum pmbus_sensor_classes
class, long val
)
560 if (data
->info
->direct
[class])
561 regval
= pmbus_data2reg_direct(data
, class, val
);
563 regval
= pmbus_data2reg_linear(data
, class, val
);
569 * Return boolean calculated from converted data.
570 * <index> defines a status register index and mask, and optionally
571 * two sensor indexes.
572 * The upper half-word references the two sensors,
573 * two sensor indices.
574 * The upper half-word references the two optional sensors,
575 * the lower half word references status register and mask.
576 * The function returns true if (status[reg] & mask) is true and,
577 * if specified, if v1 >= v2.
578 * To determine if an object exceeds upper limits, specify <v, limit>.
579 * To determine if an object exceeds lower limits, specify <limit, v>.
581 * For booleans created with pmbus_add_boolean_reg(), only the lower 16 bits of
582 * index are set. s1 and s2 (the sensor index values) are zero in this case.
583 * The function returns true if (status[reg] & mask) is true.
585 * If the boolean was created with pmbus_add_boolean_cmp(), a comparison against
586 * a specified limit has to be performed to determine the boolean result.
587 * In this case, the function returns true if v1 >= v2 (where v1 and v2 are
588 * sensor values referenced by sensor indices s1 and s2).
590 * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>.
591 * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>.
593 * If a negative value is stored in any of the referenced registers, this value
594 * reflects an error code which will be returned.
596 static int pmbus_get_boolean(struct pmbus_data
*data
, int index
, int *val
)
598 u8 s1
= (index
>> 24) & 0xff;
599 u8 s2
= (index
>> 16) & 0xff;
600 u8 reg
= (index
>> 8) & 0xff;
601 u8 mask
= index
& 0xff;
605 status
= data
->status
[reg
];
609 regval
= status
& mask
;
614 struct pmbus_sensor
*sensor1
, *sensor2
;
616 sensor1
= &data
->sensors
[s1
];
617 if (sensor1
->data
< 0)
618 return sensor1
->data
;
619 sensor2
= &data
->sensors
[s2
];
620 if (sensor2
->data
< 0)
621 return sensor2
->data
;
623 v1
= pmbus_reg2data(data
, sensor1
);
624 v2
= pmbus_reg2data(data
, sensor2
);
625 *val
= !!(regval
&& v1
>= v2
);
630 static ssize_t
pmbus_show_boolean(struct device
*dev
,
631 struct device_attribute
*da
, char *buf
)
633 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(da
);
634 struct pmbus_data
*data
= pmbus_update_device(dev
);
638 err
= pmbus_get_boolean(data
, attr
->index
, &val
);
641 return snprintf(buf
, PAGE_SIZE
, "%d\n", val
);
644 static ssize_t
pmbus_show_sensor(struct device
*dev
,
645 struct device_attribute
*da
, char *buf
)
647 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(da
);
648 struct pmbus_data
*data
= pmbus_update_device(dev
);
649 struct pmbus_sensor
*sensor
;
651 sensor
= &data
->sensors
[attr
->index
];
652 if (sensor
->data
< 0)
655 return snprintf(buf
, PAGE_SIZE
, "%d\n", pmbus_reg2data(data
, sensor
));
658 static ssize_t
pmbus_set_sensor(struct device
*dev
,
659 struct device_attribute
*devattr
,
660 const char *buf
, size_t count
)
662 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
663 struct i2c_client
*client
= to_i2c_client(dev
);
664 struct pmbus_data
*data
= i2c_get_clientdata(client
);
665 struct pmbus_sensor
*sensor
= &data
->sensors
[attr
->index
];
671 if (strict_strtol(buf
, 10, &val
) < 0)
674 mutex_lock(&data
->update_lock
);
675 regval
= pmbus_data2reg(data
, sensor
->class, val
);
676 ret
= pmbus_write_word_data(client
, sensor
->page
, sensor
->reg
, regval
);
680 data
->sensors
[attr
->index
].data
= regval
;
681 mutex_unlock(&data
->update_lock
);
685 static ssize_t
pmbus_show_label(struct device
*dev
,
686 struct device_attribute
*da
, char *buf
)
688 struct i2c_client
*client
= to_i2c_client(dev
);
689 struct pmbus_data
*data
= i2c_get_clientdata(client
);
690 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(da
);
692 return snprintf(buf
, PAGE_SIZE
, "%s\n",
693 data
->labels
[attr
->index
].label
);
696 #define PMBUS_ADD_ATTR(data, _name, _idx, _mode, _type, _show, _set) \
698 struct sensor_device_attribute *a \
699 = &data->_type##s[data->num_##_type##s].attribute; \
700 BUG_ON(data->num_attributes >= data->max_attributes); \
701 a->dev_attr.attr.name = _name; \
702 a->dev_attr.attr.mode = _mode; \
703 a->dev_attr.show = _show; \
704 a->dev_attr.store = _set; \
706 data->attributes[data->num_attributes] = &a->dev_attr.attr; \
707 data->num_attributes++; \
710 #define PMBUS_ADD_GET_ATTR(data, _name, _type, _idx) \
711 PMBUS_ADD_ATTR(data, _name, _idx, S_IRUGO, _type, \
712 pmbus_show_##_type, NULL)
714 #define PMBUS_ADD_SET_ATTR(data, _name, _type, _idx) \
715 PMBUS_ADD_ATTR(data, _name, _idx, S_IWUSR | S_IRUGO, _type, \
716 pmbus_show_##_type, pmbus_set_##_type)
718 static void pmbus_add_boolean(struct pmbus_data
*data
,
719 const char *name
, const char *type
, int seq
,
722 struct pmbus_boolean
*boolean
;
724 BUG_ON(data
->num_booleans
>= data
->max_booleans
);
726 boolean
= &data
->booleans
[data
->num_booleans
];
728 snprintf(boolean
->name
, sizeof(boolean
->name
), "%s%d_%s",
730 PMBUS_ADD_GET_ATTR(data
, boolean
->name
, boolean
, idx
);
731 data
->num_booleans
++;
734 static void pmbus_add_boolean_reg(struct pmbus_data
*data
,
735 const char *name
, const char *type
,
736 int seq
, int reg
, int bit
)
738 pmbus_add_boolean(data
, name
, type
, seq
, (reg
<< 8) | bit
);
741 static void pmbus_add_boolean_cmp(struct pmbus_data
*data
,
742 const char *name
, const char *type
,
743 int seq
, int i1
, int i2
, int reg
, int mask
)
745 pmbus_add_boolean(data
, name
, type
, seq
,
746 (i1
<< 24) | (i2
<< 16) | (reg
<< 8) | mask
);
749 static void pmbus_add_sensor(struct pmbus_data
*data
,
750 const char *name
, const char *type
, int seq
,
751 int page
, int reg
, enum pmbus_sensor_classes
class,
754 struct pmbus_sensor
*sensor
;
756 BUG_ON(data
->num_sensors
>= data
->max_sensors
);
758 sensor
= &data
->sensors
[data
->num_sensors
];
759 snprintf(sensor
->name
, sizeof(sensor
->name
), "%s%d_%s",
763 sensor
->class = class;
764 sensor
->update
= update
;
766 PMBUS_ADD_GET_ATTR(data
, sensor
->name
, sensor
,
769 PMBUS_ADD_SET_ATTR(data
, sensor
->name
, sensor
,
774 static void pmbus_add_label(struct pmbus_data
*data
,
775 const char *name
, int seq
,
776 const char *lstring
, int index
)
778 struct pmbus_label
*label
;
780 BUG_ON(data
->num_labels
>= data
->max_labels
);
782 label
= &data
->labels
[data
->num_labels
];
783 snprintf(label
->name
, sizeof(label
->name
), "%s%d_label", name
, seq
);
785 strncpy(label
->label
, lstring
, sizeof(label
->label
) - 1);
787 snprintf(label
->label
, sizeof(label
->label
), "%s%d", lstring
,
790 PMBUS_ADD_GET_ATTR(data
, label
->name
, label
, data
->num_labels
);
794 static const int pmbus_temp_registers
[] = {
795 PMBUS_READ_TEMPERATURE_1
,
796 PMBUS_READ_TEMPERATURE_2
,
797 PMBUS_READ_TEMPERATURE_3
800 static const int pmbus_temp_flags
[] = {
806 static const int pmbus_fan_registers
[] = {
807 PMBUS_READ_FAN_SPEED_1
,
808 PMBUS_READ_FAN_SPEED_2
,
809 PMBUS_READ_FAN_SPEED_3
,
810 PMBUS_READ_FAN_SPEED_4
813 static const int pmbus_fan_config_registers
[] = {
820 static const int pmbus_fan_status_registers
[] = {
827 static const u32 pmbus_fan_flags
[] = {
834 static const u32 pmbus_fan_status_flags
[] = {
835 PMBUS_HAVE_STATUS_FAN12
,
836 PMBUS_HAVE_STATUS_FAN12
,
837 PMBUS_HAVE_STATUS_FAN34
,
838 PMBUS_HAVE_STATUS_FAN34
842 * Determine maximum number of sensors, booleans, and labels.
843 * To keep things simple, only make a rough high estimate.
845 static void pmbus_find_max_attr(struct i2c_client
*client
,
846 struct pmbus_data
*data
)
848 const struct pmbus_driver_info
*info
= data
->info
;
849 int page
, max_sensors
, max_booleans
, max_labels
;
851 max_sensors
= PMBUS_MAX_INPUT_SENSORS
;
852 max_booleans
= PMBUS_MAX_INPUT_BOOLEANS
;
853 max_labels
= PMBUS_MAX_INPUT_LABELS
;
855 for (page
= 0; page
< info
->pages
; page
++) {
856 if (info
->func
[page
] & PMBUS_HAVE_VOUT
) {
857 max_sensors
+= PMBUS_VOUT_SENSORS_PER_PAGE
;
858 max_booleans
+= PMBUS_VOUT_BOOLEANS_PER_PAGE
;
861 if (info
->func
[page
] & PMBUS_HAVE_IOUT
) {
862 max_sensors
+= PMBUS_IOUT_SENSORS_PER_PAGE
;
863 max_booleans
+= PMBUS_IOUT_BOOLEANS_PER_PAGE
;
866 if (info
->func
[page
] & PMBUS_HAVE_POUT
) {
867 max_sensors
+= PMBUS_POUT_SENSORS_PER_PAGE
;
868 max_booleans
+= PMBUS_POUT_BOOLEANS_PER_PAGE
;
871 if (info
->func
[page
] & PMBUS_HAVE_FAN12
) {
872 max_sensors
+= 2 * PMBUS_MAX_SENSORS_PER_FAN
;
873 max_booleans
+= 2 * PMBUS_MAX_BOOLEANS_PER_FAN
;
875 if (info
->func
[page
] & PMBUS_HAVE_FAN34
) {
876 max_sensors
+= 2 * PMBUS_MAX_SENSORS_PER_FAN
;
877 max_booleans
+= 2 * PMBUS_MAX_BOOLEANS_PER_FAN
;
879 if (info
->func
[page
] & PMBUS_HAVE_TEMP
) {
880 max_sensors
+= PMBUS_MAX_SENSORS_PER_TEMP
;
881 max_booleans
+= PMBUS_MAX_BOOLEANS_PER_TEMP
;
883 if (info
->func
[page
] & PMBUS_HAVE_TEMP2
) {
884 max_sensors
+= PMBUS_MAX_SENSORS_PER_TEMP
;
885 max_booleans
+= PMBUS_MAX_BOOLEANS_PER_TEMP
;
887 if (info
->func
[page
] & PMBUS_HAVE_TEMP3
) {
888 max_sensors
+= PMBUS_MAX_SENSORS_PER_TEMP
;
889 max_booleans
+= PMBUS_MAX_BOOLEANS_PER_TEMP
;
892 data
->max_sensors
= max_sensors
;
893 data
->max_booleans
= max_booleans
;
894 data
->max_labels
= max_labels
;
895 data
->max_attributes
= max_sensors
+ max_booleans
+ max_labels
;
899 * Search for attributes. Allocate sensors, booleans, and labels as needed.
901 static void pmbus_find_attributes(struct i2c_client
*client
,
902 struct pmbus_data
*data
)
904 const struct pmbus_driver_info
*info
= data
->info
;
905 int page
, i0
, i1
, in_index
;
908 * Input voltage sensors
911 if (info
->func
[0] & PMBUS_HAVE_VIN
) {
912 bool have_alarm
= false;
914 i0
= data
->num_sensors
;
915 pmbus_add_label(data
, "in", in_index
, "vin", 0);
916 pmbus_add_sensor(data
, "in", "input", in_index
,
917 0, PMBUS_READ_VIN
, PSC_VOLTAGE_IN
, true);
918 if (pmbus_check_word_register(client
, 0,
919 PMBUS_VIN_UV_WARN_LIMIT
)) {
920 i1
= data
->num_sensors
;
921 pmbus_add_sensor(data
, "in", "min", in_index
,
922 0, PMBUS_VIN_UV_WARN_LIMIT
,
923 PSC_VOLTAGE_IN
, false);
924 if (info
->func
[0] & PMBUS_HAVE_STATUS_INPUT
) {
925 pmbus_add_boolean_reg(data
, "in", "min_alarm",
927 PB_STATUS_INPUT_BASE
,
928 PB_VOLTAGE_UV_WARNING
);
932 if (pmbus_check_word_register(client
, 0,
933 PMBUS_VIN_UV_FAULT_LIMIT
)) {
934 i1
= data
->num_sensors
;
935 pmbus_add_sensor(data
, "in", "lcrit", in_index
,
936 0, PMBUS_VIN_UV_FAULT_LIMIT
,
937 PSC_VOLTAGE_IN
, false);
938 if (info
->func
[0] & PMBUS_HAVE_STATUS_INPUT
) {
939 pmbus_add_boolean_reg(data
, "in", "lcrit_alarm",
941 PB_STATUS_INPUT_BASE
,
942 PB_VOLTAGE_UV_FAULT
);
946 if (pmbus_check_word_register(client
, 0,
947 PMBUS_VIN_OV_WARN_LIMIT
)) {
948 i1
= data
->num_sensors
;
949 pmbus_add_sensor(data
, "in", "max", in_index
,
950 0, PMBUS_VIN_OV_WARN_LIMIT
,
951 PSC_VOLTAGE_IN
, false);
952 if (info
->func
[0] & PMBUS_HAVE_STATUS_INPUT
) {
953 pmbus_add_boolean_reg(data
, "in", "max_alarm",
955 PB_STATUS_INPUT_BASE
,
956 PB_VOLTAGE_OV_WARNING
);
960 if (pmbus_check_word_register(client
, 0,
961 PMBUS_VIN_OV_FAULT_LIMIT
)) {
962 i1
= data
->num_sensors
;
963 pmbus_add_sensor(data
, "in", "crit", in_index
,
964 0, PMBUS_VIN_OV_FAULT_LIMIT
,
965 PSC_VOLTAGE_IN
, false);
966 if (info
->func
[0] & PMBUS_HAVE_STATUS_INPUT
) {
967 pmbus_add_boolean_reg(data
, "in", "crit_alarm",
969 PB_STATUS_INPUT_BASE
,
970 PB_VOLTAGE_OV_FAULT
);
975 * Add generic alarm attribute only if there are no individual
979 pmbus_add_boolean_reg(data
, "in", "alarm",
985 if (info
->func
[0] & PMBUS_HAVE_VCAP
) {
986 pmbus_add_label(data
, "in", in_index
, "vcap", 0);
987 pmbus_add_sensor(data
, "in", "input", in_index
, 0,
988 PMBUS_READ_VCAP
, PSC_VOLTAGE_IN
, true);
993 * Output voltage sensors
995 for (page
= 0; page
< info
->pages
; page
++) {
996 bool have_alarm
= false;
998 if (!(info
->func
[page
] & PMBUS_HAVE_VOUT
))
1001 i0
= data
->num_sensors
;
1002 pmbus_add_label(data
, "in", in_index
, "vout", page
+ 1);
1003 pmbus_add_sensor(data
, "in", "input", in_index
, page
,
1004 PMBUS_READ_VOUT
, PSC_VOLTAGE_OUT
, true);
1005 if (pmbus_check_word_register(client
, page
,
1006 PMBUS_VOUT_UV_WARN_LIMIT
)) {
1007 i1
= data
->num_sensors
;
1008 pmbus_add_sensor(data
, "in", "min", in_index
, page
,
1009 PMBUS_VOUT_UV_WARN_LIMIT
,
1010 PSC_VOLTAGE_OUT
, false);
1011 if (info
->func
[page
] & PMBUS_HAVE_STATUS_VOUT
) {
1012 pmbus_add_boolean_reg(data
, "in", "min_alarm",
1014 PB_STATUS_VOUT_BASE
+
1016 PB_VOLTAGE_UV_WARNING
);
1020 if (pmbus_check_word_register(client
, page
,
1021 PMBUS_VOUT_UV_FAULT_LIMIT
)) {
1022 i1
= data
->num_sensors
;
1023 pmbus_add_sensor(data
, "in", "lcrit", in_index
, page
,
1024 PMBUS_VOUT_UV_FAULT_LIMIT
,
1025 PSC_VOLTAGE_OUT
, false);
1026 if (info
->func
[page
] & PMBUS_HAVE_STATUS_VOUT
) {
1027 pmbus_add_boolean_reg(data
, "in", "lcrit_alarm",
1029 PB_STATUS_VOUT_BASE
+
1031 PB_VOLTAGE_UV_FAULT
);
1035 if (pmbus_check_word_register(client
, page
,
1036 PMBUS_VOUT_OV_WARN_LIMIT
)) {
1037 i1
= data
->num_sensors
;
1038 pmbus_add_sensor(data
, "in", "max", in_index
, page
,
1039 PMBUS_VOUT_OV_WARN_LIMIT
,
1040 PSC_VOLTAGE_OUT
, false);
1041 if (info
->func
[page
] & PMBUS_HAVE_STATUS_VOUT
) {
1042 pmbus_add_boolean_reg(data
, "in", "max_alarm",
1044 PB_STATUS_VOUT_BASE
+
1046 PB_VOLTAGE_OV_WARNING
);
1050 if (pmbus_check_word_register(client
, page
,
1051 PMBUS_VOUT_OV_FAULT_LIMIT
)) {
1052 i1
= data
->num_sensors
;
1053 pmbus_add_sensor(data
, "in", "crit", in_index
, page
,
1054 PMBUS_VOUT_OV_FAULT_LIMIT
,
1055 PSC_VOLTAGE_OUT
, false);
1056 if (info
->func
[page
] & PMBUS_HAVE_STATUS_VOUT
) {
1057 pmbus_add_boolean_reg(data
, "in", "crit_alarm",
1059 PB_STATUS_VOUT_BASE
+
1061 PB_VOLTAGE_OV_FAULT
);
1066 * Add generic alarm attribute only if there are no individual
1070 pmbus_add_boolean_reg(data
, "in", "alarm",
1072 PB_STATUS_BASE
+ page
,
1082 * Input current sensors
1085 if (info
->func
[0] & PMBUS_HAVE_IIN
) {
1086 i0
= data
->num_sensors
;
1087 pmbus_add_label(data
, "curr", in_index
, "iin", 0);
1088 pmbus_add_sensor(data
, "curr", "input", in_index
,
1089 0, PMBUS_READ_IIN
, PSC_CURRENT_IN
, true);
1090 if (pmbus_check_word_register(client
, 0,
1091 PMBUS_IIN_OC_WARN_LIMIT
)) {
1092 i1
= data
->num_sensors
;
1093 pmbus_add_sensor(data
, "curr", "max", in_index
,
1094 0, PMBUS_IIN_OC_WARN_LIMIT
,
1095 PSC_CURRENT_IN
, false);
1096 if (info
->func
[0] & PMBUS_HAVE_STATUS_INPUT
) {
1097 pmbus_add_boolean_reg(data
, "curr", "max_alarm",
1099 PB_STATUS_INPUT_BASE
,
1103 if (pmbus_check_word_register(client
, 0,
1104 PMBUS_IIN_OC_FAULT_LIMIT
)) {
1105 i1
= data
->num_sensors
;
1106 pmbus_add_sensor(data
, "curr", "crit", in_index
,
1107 0, PMBUS_IIN_OC_FAULT_LIMIT
,
1108 PSC_CURRENT_IN
, false);
1109 if (info
->func
[0] & PMBUS_HAVE_STATUS_INPUT
)
1110 pmbus_add_boolean_reg(data
, "curr",
1113 PB_STATUS_INPUT_BASE
,
1120 * Output current sensors
1122 for (page
= 0; page
< info
->pages
; page
++) {
1123 bool have_alarm
= false;
1125 if (!(info
->func
[page
] & PMBUS_HAVE_IOUT
))
1128 i0
= data
->num_sensors
;
1129 pmbus_add_label(data
, "curr", in_index
, "iout", page
+ 1);
1130 pmbus_add_sensor(data
, "curr", "input", in_index
, page
,
1131 PMBUS_READ_IOUT
, PSC_CURRENT_OUT
, true);
1132 if (pmbus_check_word_register(client
, page
,
1133 PMBUS_IOUT_OC_WARN_LIMIT
)) {
1134 i1
= data
->num_sensors
;
1135 pmbus_add_sensor(data
, "curr", "max", in_index
, page
,
1136 PMBUS_IOUT_OC_WARN_LIMIT
,
1137 PSC_CURRENT_OUT
, false);
1138 if (info
->func
[page
] & PMBUS_HAVE_STATUS_IOUT
) {
1139 pmbus_add_boolean_reg(data
, "curr", "max_alarm",
1141 PB_STATUS_IOUT_BASE
+
1142 page
, PB_IOUT_OC_WARNING
);
1146 if (pmbus_check_word_register(client
, page
,
1147 PMBUS_IOUT_UC_FAULT_LIMIT
)) {
1148 i1
= data
->num_sensors
;
1149 pmbus_add_sensor(data
, "curr", "lcrit", in_index
, page
,
1150 PMBUS_IOUT_UC_FAULT_LIMIT
,
1151 PSC_CURRENT_OUT
, false);
1152 if (info
->func
[page
] & PMBUS_HAVE_STATUS_IOUT
) {
1153 pmbus_add_boolean_reg(data
, "curr",
1156 PB_STATUS_IOUT_BASE
+
1157 page
, PB_IOUT_UC_FAULT
);
1161 if (pmbus_check_word_register(client
, page
,
1162 PMBUS_IOUT_OC_FAULT_LIMIT
)) {
1163 i1
= data
->num_sensors
;
1164 pmbus_add_sensor(data
, "curr", "crit", in_index
, page
,
1165 PMBUS_IOUT_OC_FAULT_LIMIT
,
1166 PSC_CURRENT_OUT
, false);
1167 if (info
->func
[page
] & PMBUS_HAVE_STATUS_IOUT
) {
1168 pmbus_add_boolean_reg(data
, "curr",
1171 PB_STATUS_IOUT_BASE
+
1172 page
, PB_IOUT_OC_FAULT
);
1177 * Add generic alarm attribute only if there are no individual
1181 pmbus_add_boolean_reg(data
, "curr", "alarm",
1183 PB_STATUS_BASE
+ page
,
1192 * Input Power sensors
1195 if (info
->func
[0] & PMBUS_HAVE_PIN
) {
1196 i0
= data
->num_sensors
;
1197 pmbus_add_label(data
, "power", in_index
, "pin", 0);
1198 pmbus_add_sensor(data
, "power", "input", in_index
,
1199 0, PMBUS_READ_PIN
, PSC_POWER
, true);
1200 if (pmbus_check_word_register(client
, 0,
1201 PMBUS_PIN_OP_WARN_LIMIT
)) {
1202 i1
= data
->num_sensors
;
1203 pmbus_add_sensor(data
, "power", "max", in_index
,
1204 0, PMBUS_PIN_OP_WARN_LIMIT
, PSC_POWER
,
1206 if (info
->func
[0] & PMBUS_HAVE_STATUS_INPUT
)
1207 pmbus_add_boolean_reg(data
, "power",
1210 PB_STATUS_INPUT_BASE
,
1217 * Output Power sensors
1219 for (page
= 0; page
< info
->pages
; page
++) {
1220 bool need_alarm
= false;
1222 if (!(info
->func
[page
] & PMBUS_HAVE_POUT
))
1225 i0
= data
->num_sensors
;
1226 pmbus_add_label(data
, "power", in_index
, "pout", page
+ 1);
1227 pmbus_add_sensor(data
, "power", "input", in_index
, page
,
1228 PMBUS_READ_POUT
, PSC_POWER
, true);
1230 * Per hwmon sysfs API, power_cap is to be used to limit output
1232 * We have two registers related to maximum output power,
1233 * PMBUS_POUT_MAX and PMBUS_POUT_OP_WARN_LIMIT.
1234 * PMBUS_POUT_MAX matches the powerX_cap attribute definition.
1235 * There is no attribute in the API to match
1236 * PMBUS_POUT_OP_WARN_LIMIT. We use powerX_max for now.
1238 if (pmbus_check_word_register(client
, page
, PMBUS_POUT_MAX
)) {
1239 i1
= data
->num_sensors
;
1240 pmbus_add_sensor(data
, "power", "cap", in_index
, page
,
1241 PMBUS_POUT_MAX
, PSC_POWER
, false);
1244 if (pmbus_check_word_register(client
, page
,
1245 PMBUS_POUT_OP_WARN_LIMIT
)) {
1246 i1
= data
->num_sensors
;
1247 pmbus_add_sensor(data
, "power", "max", in_index
, page
,
1248 PMBUS_POUT_OP_WARN_LIMIT
, PSC_POWER
,
1252 if (need_alarm
&& (info
->func
[page
] & PMBUS_HAVE_STATUS_IOUT
))
1253 pmbus_add_boolean_reg(data
, "power", "alarm",
1255 PB_STATUS_IOUT_BASE
+ page
,
1257 | PB_POWER_LIMITING
);
1259 if (pmbus_check_word_register(client
, page
,
1260 PMBUS_POUT_OP_FAULT_LIMIT
)) {
1261 i1
= data
->num_sensors
;
1262 pmbus_add_sensor(data
, "power", "crit", in_index
, page
,
1263 PMBUS_POUT_OP_FAULT_LIMIT
, PSC_POWER
,
1265 if (info
->func
[page
] & PMBUS_HAVE_STATUS_IOUT
)
1266 pmbus_add_boolean_reg(data
, "power",
1277 * Temperature sensors
1280 for (page
= 0; page
< info
->pages
; page
++) {
1283 for (t
= 0; t
< ARRAY_SIZE(pmbus_temp_registers
); t
++) {
1284 bool have_alarm
= false;
1287 * A PMBus chip may support any combination of
1288 * temperature registers on any page. So we can not
1289 * abort after a failure to detect a register, but have
1290 * to continue checking for all registers on all pages.
1292 if (!(info
->func
[page
] & pmbus_temp_flags
[t
]))
1295 if (!pmbus_check_word_register
1296 (client
, page
, pmbus_temp_registers
[t
]))
1299 i0
= data
->num_sensors
;
1300 pmbus_add_sensor(data
, "temp", "input", in_index
, page
,
1301 pmbus_temp_registers
[t
],
1302 PSC_TEMPERATURE
, true);
1305 * PMBus provides only one status register for TEMP1-3.
1306 * Thus, we can not use the status register to determine
1307 * which of the three sensors actually caused an alarm.
1308 * Always compare current temperature against the limit
1309 * registers to determine alarm conditions for a
1312 * Since there is only one set of limit registers for
1313 * up to three temperature sensors, we need to update
1314 * all limit registers after the limit was changed for
1315 * one of the sensors. This ensures that correct limits
1316 * are reported for all temperature sensors.
1318 if (pmbus_check_word_register
1319 (client
, page
, PMBUS_UT_WARN_LIMIT
)) {
1320 i1
= data
->num_sensors
;
1321 pmbus_add_sensor(data
, "temp", "min", in_index
,
1322 page
, PMBUS_UT_WARN_LIMIT
,
1323 PSC_TEMPERATURE
, true);
1324 if (info
->func
[page
] & PMBUS_HAVE_STATUS_TEMP
) {
1325 pmbus_add_boolean_cmp(data
, "temp",
1326 "min_alarm", in_index
, i1
, i0
,
1327 PB_STATUS_TEMP_BASE
+ page
,
1328 PB_TEMP_UT_WARNING
);
1332 if (pmbus_check_word_register(client
, page
,
1333 PMBUS_UT_FAULT_LIMIT
)) {
1334 i1
= data
->num_sensors
;
1335 pmbus_add_sensor(data
, "temp", "lcrit",
1337 PMBUS_UT_FAULT_LIMIT
,
1338 PSC_TEMPERATURE
, true);
1339 if (info
->func
[page
] & PMBUS_HAVE_STATUS_TEMP
) {
1340 pmbus_add_boolean_cmp(data
, "temp",
1341 "lcrit_alarm", in_index
, i1
, i0
,
1342 PB_STATUS_TEMP_BASE
+ page
,
1347 if (pmbus_check_word_register
1348 (client
, page
, PMBUS_OT_WARN_LIMIT
)) {
1349 i1
= data
->num_sensors
;
1350 pmbus_add_sensor(data
, "temp", "max", in_index
,
1351 page
, PMBUS_OT_WARN_LIMIT
,
1352 PSC_TEMPERATURE
, true);
1353 if (info
->func
[page
] & PMBUS_HAVE_STATUS_TEMP
) {
1354 pmbus_add_boolean_cmp(data
, "temp",
1355 "max_alarm", in_index
, i0
, i1
,
1356 PB_STATUS_TEMP_BASE
+ page
,
1357 PB_TEMP_OT_WARNING
);
1361 if (pmbus_check_word_register(client
, page
,
1362 PMBUS_OT_FAULT_LIMIT
)) {
1363 i1
= data
->num_sensors
;
1364 pmbus_add_sensor(data
, "temp", "crit", in_index
,
1365 page
, PMBUS_OT_FAULT_LIMIT
,
1366 PSC_TEMPERATURE
, true);
1367 if (info
->func
[page
] & PMBUS_HAVE_STATUS_TEMP
) {
1368 pmbus_add_boolean_cmp(data
, "temp",
1369 "crit_alarm", in_index
, i0
, i1
,
1370 PB_STATUS_TEMP_BASE
+ page
,
1376 * Last resort - we were not able to create any alarm
1377 * registers. Report alarm for all sensors using the
1378 * status register temperature alarm bit.
1381 pmbus_add_boolean_reg(data
, "temp", "alarm",
1383 PB_STATUS_BASE
+ page
,
1384 PB_STATUS_TEMPERATURE
);
1393 for (page
= 0; page
< info
->pages
; page
++) {
1396 for (f
= 0; f
< ARRAY_SIZE(pmbus_fan_registers
); f
++) {
1399 if (!(info
->func
[page
] & pmbus_fan_flags
[f
]))
1402 if (!pmbus_check_word_register(client
, page
,
1403 pmbus_fan_registers
[f
])
1404 || !pmbus_check_byte_register(client
, page
,
1405 pmbus_fan_config_registers
[f
]))
1409 * Skip fan if not installed.
1410 * Each fan configuration register covers multiple fans,
1411 * so we have to do some magic.
1413 regval
= pmbus_read_byte_data(client
, page
,
1414 pmbus_fan_config_registers
[f
]);
1416 (!(regval
& (PB_FAN_1_INSTALLED
>> ((f
& 1) * 4)))))
1419 i0
= data
->num_sensors
;
1420 pmbus_add_sensor(data
, "fan", "input", in_index
, page
,
1421 pmbus_fan_registers
[f
], PSC_FAN
, true);
1424 * Each fan status register covers multiple fans,
1425 * so we have to do some magic.
1427 if ((info
->func
[page
] & pmbus_fan_status_flags
[f
]) &&
1428 pmbus_check_byte_register(client
,
1429 page
, pmbus_fan_status_registers
[f
])) {
1432 if (f
> 1) /* fan 3, 4 */
1433 base
= PB_STATUS_FAN34_BASE
+ page
;
1435 base
= PB_STATUS_FAN_BASE
+ page
;
1436 pmbus_add_boolean_reg(data
, "fan", "alarm",
1438 PB_FAN_FAN1_WARNING
>> (f
& 1));
1439 pmbus_add_boolean_reg(data
, "fan", "fault",
1441 PB_FAN_FAN1_FAULT
>> (f
& 1));
1449 * Identify chip parameters.
1450 * This function is called for all chips.
1452 static int pmbus_identify_common(struct i2c_client
*client
,
1453 struct pmbus_data
*data
)
1455 int vout_mode
= -1, exponent
;
1457 if (pmbus_check_byte_register(client
, 0, PMBUS_VOUT_MODE
))
1458 vout_mode
= pmbus_read_byte_data(client
, 0, PMBUS_VOUT_MODE
);
1459 if (vout_mode
>= 0 && vout_mode
!= 0xff) {
1461 * Not all chips support the VOUT_MODE command,
1462 * so a failure to read it is not an error.
1464 switch (vout_mode
>> 5) {
1465 case 0: /* linear mode */
1466 if (data
->info
->direct
[PSC_VOLTAGE_OUT
])
1469 exponent
= vout_mode
& 0x1f;
1470 /* and sign-extend it */
1471 if (exponent
& 0x10)
1473 data
->exponent
= exponent
;
1475 case 2: /* direct mode */
1476 if (!data
->info
->direct
[PSC_VOLTAGE_OUT
])
1484 /* Determine maximum number of sensors, booleans, and labels */
1485 pmbus_find_max_attr(client
, data
);
1486 pmbus_clear_fault_page(client
, 0);
1490 int pmbus_do_probe(struct i2c_client
*client
, const struct i2c_device_id
*id
,
1491 struct pmbus_driver_info
*info
)
1493 const struct pmbus_platform_data
*pdata
= client
->dev
.platform_data
;
1494 struct pmbus_data
*data
;
1498 dev_err(&client
->dev
, "Missing chip information");
1502 if (!i2c_check_functionality(client
->adapter
, I2C_FUNC_SMBUS_WRITE_BYTE
1503 | I2C_FUNC_SMBUS_BYTE_DATA
1504 | I2C_FUNC_SMBUS_WORD_DATA
))
1507 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
1509 dev_err(&client
->dev
, "No memory to allocate driver data\n");
1513 i2c_set_clientdata(client
, data
);
1514 mutex_init(&data
->update_lock
);
1517 * Bail out if status register or PMBus revision register
1520 if (i2c_smbus_read_byte_data(client
, PMBUS_STATUS_BYTE
) < 0
1521 || i2c_smbus_read_byte_data(client
, PMBUS_REVISION
) < 0) {
1522 dev_err(&client
->dev
,
1523 "Status or revision register not found\n");
1529 data
->flags
= pdata
->flags
;
1532 pmbus_clear_faults(client
);
1534 if (info
->identify
) {
1535 ret
= (*info
->identify
)(client
, info
);
1537 dev_err(&client
->dev
, "Chip identification failed\n");
1542 if (info
->pages
<= 0 || info
->pages
> PMBUS_PAGES
) {
1543 dev_err(&client
->dev
, "Bad number of PMBus pages: %d\n",
1549 * Bail out if more than one page was configured, but we can not
1550 * select the highest page. This is an indication that the wrong
1551 * chip type was selected. Better bail out now than keep
1552 * returning errors later on.
1554 if (info
->pages
> 1 && pmbus_set_page(client
, info
->pages
- 1) < 0) {
1555 dev_err(&client
->dev
, "Failed to select page %d\n",
1561 ret
= pmbus_identify_common(client
, data
);
1563 dev_err(&client
->dev
, "Failed to identify chip capabilities\n");
1568 data
->sensors
= kzalloc(sizeof(struct pmbus_sensor
) * data
->max_sensors
,
1570 if (!data
->sensors
) {
1571 dev_err(&client
->dev
, "No memory to allocate sensor data\n");
1575 data
->booleans
= kzalloc(sizeof(struct pmbus_boolean
)
1576 * data
->max_booleans
, GFP_KERNEL
);
1577 if (!data
->booleans
) {
1578 dev_err(&client
->dev
, "No memory to allocate boolean data\n");
1582 data
->labels
= kzalloc(sizeof(struct pmbus_label
) * data
->max_labels
,
1584 if (!data
->labels
) {
1585 dev_err(&client
->dev
, "No memory to allocate label data\n");
1589 data
->attributes
= kzalloc(sizeof(struct attribute
*)
1590 * data
->max_attributes
, GFP_KERNEL
);
1591 if (!data
->attributes
) {
1592 dev_err(&client
->dev
, "No memory to allocate attribute data\n");
1596 pmbus_find_attributes(client
, data
);
1599 * If there are no attributes, something is wrong.
1600 * Bail out instead of trying to register nothing.
1602 if (!data
->num_attributes
) {
1603 dev_err(&client
->dev
, "No attributes found\n");
1605 goto out_attributes
;
1608 /* Register sysfs hooks */
1609 data
->group
.attrs
= data
->attributes
;
1610 ret
= sysfs_create_group(&client
->dev
.kobj
, &data
->group
);
1612 dev_err(&client
->dev
, "Failed to create sysfs entries\n");
1613 goto out_attributes
;
1615 data
->hwmon_dev
= hwmon_device_register(&client
->dev
);
1616 if (IS_ERR(data
->hwmon_dev
)) {
1617 ret
= PTR_ERR(data
->hwmon_dev
);
1618 dev_err(&client
->dev
, "Failed to register hwmon device\n");
1619 goto out_hwmon_device_register
;
1623 out_hwmon_device_register
:
1624 sysfs_remove_group(&client
->dev
.kobj
, &data
->group
);
1626 kfree(data
->attributes
);
1628 kfree(data
->labels
);
1630 kfree(data
->booleans
);
1632 kfree(data
->sensors
);
1637 EXPORT_SYMBOL_GPL(pmbus_do_probe
);
1639 int pmbus_do_remove(struct i2c_client
*client
)
1641 struct pmbus_data
*data
= i2c_get_clientdata(client
);
1642 hwmon_device_unregister(data
->hwmon_dev
);
1643 sysfs_remove_group(&client
->dev
.kobj
, &data
->group
);
1644 kfree(data
->attributes
);
1645 kfree(data
->labels
);
1646 kfree(data
->booleans
);
1647 kfree(data
->sensors
);
1651 EXPORT_SYMBOL_GPL(pmbus_do_remove
);
1653 MODULE_AUTHOR("Guenter Roeck");
1654 MODULE_DESCRIPTION("PMBus core driver");
1655 MODULE_LICENSE("GPL");