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 4 /* input, cap, max, crit */
44 #define PMBUS_MAX_SENSORS_PER_FAN 1 /* input */
45 #define PMBUS_MAX_SENSORS_PER_TEMP 8 /* input, min, max, lcrit,
46 crit, lowest, highest,
49 #define PMBUS_MAX_INPUT_BOOLEANS 7 /* v: min_alarm, max_alarm,
50 lcrit_alarm, crit_alarm;
53 #define PMBUS_VOUT_BOOLEANS_PER_PAGE 4 /* min_alarm, max_alarm,
54 lcrit_alarm, crit_alarm */
55 #define PMBUS_IOUT_BOOLEANS_PER_PAGE 3 /* alarm, lcrit_alarm,
57 #define PMBUS_POUT_BOOLEANS_PER_PAGE 2 /* alarm, crit_alarm */
58 #define PMBUS_MAX_BOOLEANS_PER_FAN 2 /* alarm, fault */
59 #define PMBUS_MAX_BOOLEANS_PER_TEMP 4 /* min_alarm, max_alarm,
60 lcrit_alarm, crit_alarm */
62 #define PMBUS_MAX_INPUT_LABELS 4 /* vin, vcap, iin, pin */
65 * status, status_vout, status_iout, status_fans, status_fan34, and status_temp
66 * are paged. status_input is unpaged.
68 #define PB_NUM_STATUS_REG (PMBUS_PAGES * 6 + 1)
71 * Index into status register array, per status register group
73 #define PB_STATUS_BASE 0
74 #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES)
75 #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES)
76 #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES)
77 #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES)
78 #define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES)
79 #define PB_STATUS_TEMP_BASE (PB_STATUS_INPUT_BASE + 1)
81 #define PMBUS_NAME_SIZE 24
84 char name
[PMBUS_NAME_SIZE
]; /* sysfs sensor name */
85 struct sensor_device_attribute attribute
;
86 u8 page
; /* page number */
87 u16 reg
; /* register */
88 enum pmbus_sensor_classes
class; /* sensor class */
89 bool update
; /* runtime sensor update needed */
90 int data
; /* Sensor data.
91 Negative if there was a read error */
94 struct pmbus_boolean
{
95 char name
[PMBUS_NAME_SIZE
]; /* sysfs boolean name */
96 struct sensor_device_attribute attribute
;
100 char name
[PMBUS_NAME_SIZE
]; /* sysfs label name */
101 struct sensor_device_attribute attribute
;
102 char label
[PMBUS_NAME_SIZE
]; /* label */
106 struct device
*hwmon_dev
;
108 u32 flags
; /* from platform data */
110 int exponent
; /* linear mode: exponent for output voltages */
112 const struct pmbus_driver_info
*info
;
116 struct attribute
**attributes
;
117 struct attribute_group group
;
120 * Sensors cover both sensor and limit registers.
124 struct pmbus_sensor
*sensors
;
126 * Booleans are used for alarms.
127 * Values are determined from status registers.
131 struct pmbus_boolean
*booleans
;
133 * Labels are used to map generic names (e.g., "in1")
134 * to PMBus specific names (e.g., "vin" or "vout1").
138 struct pmbus_label
*labels
;
140 struct mutex update_lock
;
142 unsigned long last_updated
; /* in jiffies */
145 * A single status register covers multiple attributes,
146 * so we keep them all together.
148 u8 status
[PB_NUM_STATUS_REG
];
153 int pmbus_set_page(struct i2c_client
*client
, u8 page
)
155 struct pmbus_data
*data
= i2c_get_clientdata(client
);
159 if (page
!= data
->currpage
) {
160 rv
= i2c_smbus_write_byte_data(client
, PMBUS_PAGE
, page
);
161 newpage
= i2c_smbus_read_byte_data(client
, PMBUS_PAGE
);
165 data
->currpage
= page
;
169 EXPORT_SYMBOL_GPL(pmbus_set_page
);
171 int pmbus_write_byte(struct i2c_client
*client
, int page
, u8 value
)
176 rv
= pmbus_set_page(client
, page
);
181 return i2c_smbus_write_byte(client
, value
);
183 EXPORT_SYMBOL_GPL(pmbus_write_byte
);
186 * _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if
187 * a device specific mapping funcion exists and calls it if necessary.
189 static int _pmbus_write_byte(struct i2c_client
*client
, int page
, u8 value
)
191 struct pmbus_data
*data
= i2c_get_clientdata(client
);
192 const struct pmbus_driver_info
*info
= data
->info
;
195 if (info
->write_byte
) {
196 status
= info
->write_byte(client
, page
, value
);
197 if (status
!= -ENODATA
)
200 return pmbus_write_byte(client
, page
, value
);
203 int pmbus_write_word_data(struct i2c_client
*client
, u8 page
, u8 reg
, u16 word
)
207 rv
= pmbus_set_page(client
, page
);
211 return i2c_smbus_write_word_data(client
, reg
, word
);
213 EXPORT_SYMBOL_GPL(pmbus_write_word_data
);
216 * _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if
217 * a device specific mapping function exists and calls it if necessary.
219 static int _pmbus_write_word_data(struct i2c_client
*client
, int page
, int reg
,
222 struct pmbus_data
*data
= i2c_get_clientdata(client
);
223 const struct pmbus_driver_info
*info
= data
->info
;
226 if (info
->write_word_data
) {
227 status
= info
->write_word_data(client
, page
, reg
, word
);
228 if (status
!= -ENODATA
)
231 if (reg
>= PMBUS_VIRT_BASE
)
233 return pmbus_write_word_data(client
, page
, reg
, word
);
236 int pmbus_read_word_data(struct i2c_client
*client
, u8 page
, u8 reg
)
240 rv
= pmbus_set_page(client
, page
);
244 return i2c_smbus_read_word_data(client
, reg
);
246 EXPORT_SYMBOL_GPL(pmbus_read_word_data
);
249 * _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if
250 * a device specific mapping function exists and calls it if necessary.
252 static int _pmbus_read_word_data(struct i2c_client
*client
, int page
, int reg
)
254 struct pmbus_data
*data
= i2c_get_clientdata(client
);
255 const struct pmbus_driver_info
*info
= data
->info
;
258 if (info
->read_word_data
) {
259 status
= info
->read_word_data(client
, page
, reg
);
260 if (status
!= -ENODATA
)
263 if (reg
>= PMBUS_VIRT_BASE
)
265 return pmbus_read_word_data(client
, page
, reg
);
268 int pmbus_read_byte_data(struct i2c_client
*client
, int page
, u8 reg
)
273 rv
= pmbus_set_page(client
, page
);
278 return i2c_smbus_read_byte_data(client
, reg
);
280 EXPORT_SYMBOL_GPL(pmbus_read_byte_data
);
283 * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if
284 * a device specific mapping function exists and calls it if necessary.
286 static int _pmbus_read_byte_data(struct i2c_client
*client
, int page
, int reg
)
288 struct pmbus_data
*data
= i2c_get_clientdata(client
);
289 const struct pmbus_driver_info
*info
= data
->info
;
292 if (info
->read_byte_data
) {
293 status
= info
->read_byte_data(client
, page
, reg
);
294 if (status
!= -ENODATA
)
297 return pmbus_read_byte_data(client
, page
, reg
);
300 static void pmbus_clear_fault_page(struct i2c_client
*client
, int page
)
302 _pmbus_write_byte(client
, page
, PMBUS_CLEAR_FAULTS
);
305 void pmbus_clear_faults(struct i2c_client
*client
)
307 struct pmbus_data
*data
= i2c_get_clientdata(client
);
310 for (i
= 0; i
< data
->info
->pages
; i
++)
311 pmbus_clear_fault_page(client
, i
);
313 EXPORT_SYMBOL_GPL(pmbus_clear_faults
);
315 static int pmbus_check_status_cml(struct i2c_client
*client
)
319 status
= pmbus_read_byte_data(client
, -1, PMBUS_STATUS_BYTE
);
320 if (status
< 0 || (status
& PB_STATUS_CML
)) {
321 status2
= pmbus_read_byte_data(client
, -1, PMBUS_STATUS_CML
);
322 if (status2
< 0 || (status2
& PB_CML_FAULT_INVALID_COMMAND
))
328 bool pmbus_check_byte_register(struct i2c_client
*client
, int page
, int reg
)
331 struct pmbus_data
*data
= i2c_get_clientdata(client
);
333 rv
= _pmbus_read_byte_data(client
, page
, reg
);
334 if (rv
>= 0 && !(data
->flags
& PMBUS_SKIP_STATUS_CHECK
))
335 rv
= pmbus_check_status_cml(client
);
336 pmbus_clear_fault_page(client
, -1);
339 EXPORT_SYMBOL_GPL(pmbus_check_byte_register
);
341 bool pmbus_check_word_register(struct i2c_client
*client
, int page
, int reg
)
344 struct pmbus_data
*data
= i2c_get_clientdata(client
);
346 rv
= _pmbus_read_word_data(client
, page
, reg
);
347 if (rv
>= 0 && !(data
->flags
& PMBUS_SKIP_STATUS_CHECK
))
348 rv
= pmbus_check_status_cml(client
);
349 pmbus_clear_fault_page(client
, -1);
352 EXPORT_SYMBOL_GPL(pmbus_check_word_register
);
354 const struct pmbus_driver_info
*pmbus_get_driver_info(struct i2c_client
*client
)
356 struct pmbus_data
*data
= i2c_get_clientdata(client
);
360 EXPORT_SYMBOL_GPL(pmbus_get_driver_info
);
362 static struct pmbus_data
*pmbus_update_device(struct device
*dev
)
364 struct i2c_client
*client
= to_i2c_client(dev
);
365 struct pmbus_data
*data
= i2c_get_clientdata(client
);
366 const struct pmbus_driver_info
*info
= data
->info
;
368 mutex_lock(&data
->update_lock
);
369 if (time_after(jiffies
, data
->last_updated
+ HZ
) || !data
->valid
) {
372 for (i
= 0; i
< info
->pages
; i
++)
373 data
->status
[PB_STATUS_BASE
+ i
]
374 = pmbus_read_byte_data(client
, i
,
376 for (i
= 0; i
< info
->pages
; i
++) {
377 if (!(info
->func
[i
] & PMBUS_HAVE_STATUS_VOUT
))
379 data
->status
[PB_STATUS_VOUT_BASE
+ i
]
380 = _pmbus_read_byte_data(client
, i
, PMBUS_STATUS_VOUT
);
382 for (i
= 0; i
< info
->pages
; i
++) {
383 if (!(info
->func
[i
] & PMBUS_HAVE_STATUS_IOUT
))
385 data
->status
[PB_STATUS_IOUT_BASE
+ i
]
386 = _pmbus_read_byte_data(client
, i
, PMBUS_STATUS_IOUT
);
388 for (i
= 0; i
< info
->pages
; i
++) {
389 if (!(info
->func
[i
] & PMBUS_HAVE_STATUS_TEMP
))
391 data
->status
[PB_STATUS_TEMP_BASE
+ i
]
392 = _pmbus_read_byte_data(client
, i
,
393 PMBUS_STATUS_TEMPERATURE
);
395 for (i
= 0; i
< info
->pages
; i
++) {
396 if (!(info
->func
[i
] & PMBUS_HAVE_STATUS_FAN12
))
398 data
->status
[PB_STATUS_FAN_BASE
+ i
]
399 = _pmbus_read_byte_data(client
, i
,
400 PMBUS_STATUS_FAN_12
);
403 for (i
= 0; i
< info
->pages
; i
++) {
404 if (!(info
->func
[i
] & PMBUS_HAVE_STATUS_FAN34
))
406 data
->status
[PB_STATUS_FAN34_BASE
+ i
]
407 = _pmbus_read_byte_data(client
, i
,
408 PMBUS_STATUS_FAN_34
);
411 if (info
->func
[0] & PMBUS_HAVE_STATUS_INPUT
)
412 data
->status
[PB_STATUS_INPUT_BASE
]
413 = _pmbus_read_byte_data(client
, 0,
416 for (i
= 0; i
< data
->num_sensors
; i
++) {
417 struct pmbus_sensor
*sensor
= &data
->sensors
[i
];
419 if (!data
->valid
|| sensor
->update
)
421 = _pmbus_read_word_data(client
,
425 pmbus_clear_faults(client
);
426 data
->last_updated
= jiffies
;
429 mutex_unlock(&data
->update_lock
);
434 * Convert linear sensor values to milli- or micro-units
435 * depending on sensor type.
437 static long pmbus_reg2data_linear(struct pmbus_data
*data
,
438 struct pmbus_sensor
*sensor
)
444 if (sensor
->class == PSC_VOLTAGE_OUT
) { /* LINEAR16 */
445 exponent
= data
->exponent
;
446 mantissa
= (u16
) sensor
->data
;
447 } else { /* LINEAR11 */
448 exponent
= (sensor
->data
>> 11) & 0x001f;
449 mantissa
= sensor
->data
& 0x07ff;
452 exponent
|= 0xffe0; /* sign extend exponent */
453 if (mantissa
> 0x03ff)
454 mantissa
|= 0xfffff800; /* sign extend mantissa */
459 /* scale result to milli-units for all sensors except fans */
460 if (sensor
->class != PSC_FAN
)
463 /* scale result to micro-units for power sensors */
464 if (sensor
->class == PSC_POWER
)
476 * Convert direct sensor values to milli- or micro-units
477 * depending on sensor type.
479 static long pmbus_reg2data_direct(struct pmbus_data
*data
,
480 struct pmbus_sensor
*sensor
)
482 long val
= (s16
) sensor
->data
;
485 m
= data
->info
->m
[sensor
->class];
486 b
= data
->info
->b
[sensor
->class];
487 R
= data
->info
->R
[sensor
->class];
492 /* X = 1/m * (Y * 10^-R - b) */
494 /* scale result to milli-units for everything but fans */
495 if (sensor
->class != PSC_FAN
) {
500 /* scale result to micro-units for power sensors */
501 if (sensor
->class == PSC_POWER
) {
511 val
= DIV_ROUND_CLOSEST(val
, 10);
515 return (val
- b
) / m
;
519 * Convert VID sensor values to milli- or micro-units
520 * depending on sensor type.
521 * We currently only support VR11.
523 static long pmbus_reg2data_vid(struct pmbus_data
*data
,
524 struct pmbus_sensor
*sensor
)
526 long val
= sensor
->data
;
528 if (val
< 0x02 || val
> 0xb2)
530 return DIV_ROUND_CLOSEST(160000 - (val
- 2) * 625, 100);
533 static long pmbus_reg2data(struct pmbus_data
*data
, struct pmbus_sensor
*sensor
)
537 switch (data
->info
->format
[sensor
->class]) {
539 val
= pmbus_reg2data_direct(data
, sensor
);
542 val
= pmbus_reg2data_vid(data
, sensor
);
546 val
= pmbus_reg2data_linear(data
, sensor
);
552 #define MAX_MANTISSA (1023 * 1000)
553 #define MIN_MANTISSA (511 * 1000)
555 static u16
pmbus_data2reg_linear(struct pmbus_data
*data
,
556 enum pmbus_sensor_classes
class, long val
)
558 s16 exponent
= 0, mantissa
;
559 bool negative
= false;
565 if (class == PSC_VOLTAGE_OUT
) {
566 /* LINEAR16 does not support negative voltages */
571 * For a static exponents, we don't have a choice
572 * but to adjust the value to it.
574 if (data
->exponent
< 0)
575 val
<<= -data
->exponent
;
577 val
>>= data
->exponent
;
578 val
= DIV_ROUND_CLOSEST(val
, 1000);
587 /* Power is in uW. Convert to mW before converting. */
588 if (class == PSC_POWER
)
589 val
= DIV_ROUND_CLOSEST(val
, 1000L);
592 * For simplicity, convert fan data to milli-units
593 * before calculating the exponent.
595 if (class == PSC_FAN
)
598 /* Reduce large mantissa until it fits into 10 bit */
599 while (val
>= MAX_MANTISSA
&& exponent
< 15) {
603 /* Increase small mantissa to improve precision */
604 while (val
< MIN_MANTISSA
&& exponent
> -15) {
609 /* Convert mantissa from milli-units to units */
610 mantissa
= DIV_ROUND_CLOSEST(val
, 1000);
612 /* Ensure that resulting number is within range */
613 if (mantissa
> 0x3ff)
618 mantissa
= -mantissa
;
620 /* Convert to 5 bit exponent, 11 bit mantissa */
621 return (mantissa
& 0x7ff) | ((exponent
<< 11) & 0xf800);
624 static u16
pmbus_data2reg_direct(struct pmbus_data
*data
,
625 enum pmbus_sensor_classes
class, long val
)
629 m
= data
->info
->m
[class];
630 b
= data
->info
->b
[class];
631 R
= data
->info
->R
[class];
633 /* Power is in uW. Adjust R and b. */
634 if (class == PSC_POWER
) {
639 /* Calculate Y = (m * X + b) * 10^R */
640 if (class != PSC_FAN
) {
641 R
-= 3; /* Adjust R and b for data in milli-units */
651 val
= DIV_ROUND_CLOSEST(val
, 10);
658 static u16
pmbus_data2reg_vid(struct pmbus_data
*data
,
659 enum pmbus_sensor_classes
class, long val
)
661 val
= SENSORS_LIMIT(val
, 500, 1600);
663 return 2 + DIV_ROUND_CLOSEST((1600 - val
) * 100, 625);
666 static u16
pmbus_data2reg(struct pmbus_data
*data
,
667 enum pmbus_sensor_classes
class, long val
)
671 switch (data
->info
->format
[class]) {
673 regval
= pmbus_data2reg_direct(data
, class, val
);
676 regval
= pmbus_data2reg_vid(data
, class, val
);
680 regval
= pmbus_data2reg_linear(data
, class, val
);
687 * Return boolean calculated from converted data.
688 * <index> defines a status register index and mask, and optionally
689 * two sensor indexes.
690 * The upper half-word references the two sensors,
691 * two sensor indices.
692 * The upper half-word references the two optional sensors,
693 * the lower half word references status register and mask.
694 * The function returns true if (status[reg] & mask) is true and,
695 * if specified, if v1 >= v2.
696 * To determine if an object exceeds upper limits, specify <v, limit>.
697 * To determine if an object exceeds lower limits, specify <limit, v>.
699 * For booleans created with pmbus_add_boolean_reg(), only the lower 16 bits of
700 * index are set. s1 and s2 (the sensor index values) are zero in this case.
701 * The function returns true if (status[reg] & mask) is true.
703 * If the boolean was created with pmbus_add_boolean_cmp(), a comparison against
704 * a specified limit has to be performed to determine the boolean result.
705 * In this case, the function returns true if v1 >= v2 (where v1 and v2 are
706 * sensor values referenced by sensor indices s1 and s2).
708 * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>.
709 * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>.
711 * If a negative value is stored in any of the referenced registers, this value
712 * reflects an error code which will be returned.
714 static int pmbus_get_boolean(struct pmbus_data
*data
, int index
, int *val
)
716 u8 s1
= (index
>> 24) & 0xff;
717 u8 s2
= (index
>> 16) & 0xff;
718 u8 reg
= (index
>> 8) & 0xff;
719 u8 mask
= index
& 0xff;
723 status
= data
->status
[reg
];
727 regval
= status
& mask
;
732 struct pmbus_sensor
*sensor1
, *sensor2
;
734 sensor1
= &data
->sensors
[s1
];
735 if (sensor1
->data
< 0)
736 return sensor1
->data
;
737 sensor2
= &data
->sensors
[s2
];
738 if (sensor2
->data
< 0)
739 return sensor2
->data
;
741 v1
= pmbus_reg2data(data
, sensor1
);
742 v2
= pmbus_reg2data(data
, sensor2
);
743 *val
= !!(regval
&& v1
>= v2
);
748 static ssize_t
pmbus_show_boolean(struct device
*dev
,
749 struct device_attribute
*da
, char *buf
)
751 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(da
);
752 struct pmbus_data
*data
= pmbus_update_device(dev
);
756 err
= pmbus_get_boolean(data
, attr
->index
, &val
);
759 return snprintf(buf
, PAGE_SIZE
, "%d\n", val
);
762 static ssize_t
pmbus_show_sensor(struct device
*dev
,
763 struct device_attribute
*da
, char *buf
)
765 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(da
);
766 struct pmbus_data
*data
= pmbus_update_device(dev
);
767 struct pmbus_sensor
*sensor
;
769 sensor
= &data
->sensors
[attr
->index
];
770 if (sensor
->data
< 0)
773 return snprintf(buf
, PAGE_SIZE
, "%ld\n", pmbus_reg2data(data
, sensor
));
776 static ssize_t
pmbus_set_sensor(struct device
*dev
,
777 struct device_attribute
*devattr
,
778 const char *buf
, size_t count
)
780 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
781 struct i2c_client
*client
= to_i2c_client(dev
);
782 struct pmbus_data
*data
= i2c_get_clientdata(client
);
783 struct pmbus_sensor
*sensor
= &data
->sensors
[attr
->index
];
789 if (strict_strtol(buf
, 10, &val
) < 0)
792 mutex_lock(&data
->update_lock
);
793 regval
= pmbus_data2reg(data
, sensor
->class, val
);
794 ret
= _pmbus_write_word_data(client
, sensor
->page
, sensor
->reg
, regval
);
798 data
->sensors
[attr
->index
].data
= regval
;
799 mutex_unlock(&data
->update_lock
);
803 static ssize_t
pmbus_show_label(struct device
*dev
,
804 struct device_attribute
*da
, char *buf
)
806 struct i2c_client
*client
= to_i2c_client(dev
);
807 struct pmbus_data
*data
= i2c_get_clientdata(client
);
808 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(da
);
810 return snprintf(buf
, PAGE_SIZE
, "%s\n",
811 data
->labels
[attr
->index
].label
);
814 #define PMBUS_ADD_ATTR(data, _name, _idx, _mode, _type, _show, _set) \
816 struct sensor_device_attribute *a \
817 = &data->_type##s[data->num_##_type##s].attribute; \
818 BUG_ON(data->num_attributes >= data->max_attributes); \
819 sysfs_attr_init(&a->dev_attr.attr); \
820 a->dev_attr.attr.name = _name; \
821 a->dev_attr.attr.mode = _mode; \
822 a->dev_attr.show = _show; \
823 a->dev_attr.store = _set; \
825 data->attributes[data->num_attributes] = &a->dev_attr.attr; \
826 data->num_attributes++; \
829 #define PMBUS_ADD_GET_ATTR(data, _name, _type, _idx) \
830 PMBUS_ADD_ATTR(data, _name, _idx, S_IRUGO, _type, \
831 pmbus_show_##_type, NULL)
833 #define PMBUS_ADD_SET_ATTR(data, _name, _type, _idx) \
834 PMBUS_ADD_ATTR(data, _name, _idx, S_IWUSR | S_IRUGO, _type, \
835 pmbus_show_##_type, pmbus_set_##_type)
837 static void pmbus_add_boolean(struct pmbus_data
*data
,
838 const char *name
, const char *type
, int seq
,
841 struct pmbus_boolean
*boolean
;
843 BUG_ON(data
->num_booleans
>= data
->max_booleans
);
845 boolean
= &data
->booleans
[data
->num_booleans
];
847 snprintf(boolean
->name
, sizeof(boolean
->name
), "%s%d_%s",
849 PMBUS_ADD_GET_ATTR(data
, boolean
->name
, boolean
, idx
);
850 data
->num_booleans
++;
853 static void pmbus_add_boolean_reg(struct pmbus_data
*data
,
854 const char *name
, const char *type
,
855 int seq
, int reg
, int bit
)
857 pmbus_add_boolean(data
, name
, type
, seq
, (reg
<< 8) | bit
);
860 static void pmbus_add_boolean_cmp(struct pmbus_data
*data
,
861 const char *name
, const char *type
,
862 int seq
, int i1
, int i2
, int reg
, int mask
)
864 pmbus_add_boolean(data
, name
, type
, seq
,
865 (i1
<< 24) | (i2
<< 16) | (reg
<< 8) | mask
);
868 static void pmbus_add_sensor(struct pmbus_data
*data
,
869 const char *name
, const char *type
, int seq
,
870 int page
, int reg
, enum pmbus_sensor_classes
class,
871 bool update
, bool readonly
)
873 struct pmbus_sensor
*sensor
;
875 BUG_ON(data
->num_sensors
>= data
->max_sensors
);
877 sensor
= &data
->sensors
[data
->num_sensors
];
878 snprintf(sensor
->name
, sizeof(sensor
->name
), "%s%d_%s",
882 sensor
->class = class;
883 sensor
->update
= update
;
885 PMBUS_ADD_GET_ATTR(data
, sensor
->name
, sensor
,
888 PMBUS_ADD_SET_ATTR(data
, sensor
->name
, sensor
,
893 static void pmbus_add_label(struct pmbus_data
*data
,
894 const char *name
, int seq
,
895 const char *lstring
, int index
)
897 struct pmbus_label
*label
;
899 BUG_ON(data
->num_labels
>= data
->max_labels
);
901 label
= &data
->labels
[data
->num_labels
];
902 snprintf(label
->name
, sizeof(label
->name
), "%s%d_label", name
, seq
);
904 strncpy(label
->label
, lstring
, sizeof(label
->label
) - 1);
906 snprintf(label
->label
, sizeof(label
->label
), "%s%d", lstring
,
909 PMBUS_ADD_GET_ATTR(data
, label
->name
, label
, data
->num_labels
);
914 * Determine maximum number of sensors, booleans, and labels.
915 * To keep things simple, only make a rough high estimate.
917 static void pmbus_find_max_attr(struct i2c_client
*client
,
918 struct pmbus_data
*data
)
920 const struct pmbus_driver_info
*info
= data
->info
;
921 int page
, max_sensors
, max_booleans
, max_labels
;
923 max_sensors
= PMBUS_MAX_INPUT_SENSORS
;
924 max_booleans
= PMBUS_MAX_INPUT_BOOLEANS
;
925 max_labels
= PMBUS_MAX_INPUT_LABELS
;
927 for (page
= 0; page
< info
->pages
; page
++) {
928 if (info
->func
[page
] & PMBUS_HAVE_VOUT
) {
929 max_sensors
+= PMBUS_VOUT_SENSORS_PER_PAGE
;
930 max_booleans
+= PMBUS_VOUT_BOOLEANS_PER_PAGE
;
933 if (info
->func
[page
] & PMBUS_HAVE_IOUT
) {
934 max_sensors
+= PMBUS_IOUT_SENSORS_PER_PAGE
;
935 max_booleans
+= PMBUS_IOUT_BOOLEANS_PER_PAGE
;
938 if (info
->func
[page
] & PMBUS_HAVE_POUT
) {
939 max_sensors
+= PMBUS_POUT_SENSORS_PER_PAGE
;
940 max_booleans
+= PMBUS_POUT_BOOLEANS_PER_PAGE
;
943 if (info
->func
[page
] & PMBUS_HAVE_FAN12
) {
944 max_sensors
+= 2 * PMBUS_MAX_SENSORS_PER_FAN
;
945 max_booleans
+= 2 * PMBUS_MAX_BOOLEANS_PER_FAN
;
947 if (info
->func
[page
] & PMBUS_HAVE_FAN34
) {
948 max_sensors
+= 2 * PMBUS_MAX_SENSORS_PER_FAN
;
949 max_booleans
+= 2 * PMBUS_MAX_BOOLEANS_PER_FAN
;
951 if (info
->func
[page
] & PMBUS_HAVE_TEMP
) {
952 max_sensors
+= PMBUS_MAX_SENSORS_PER_TEMP
;
953 max_booleans
+= PMBUS_MAX_BOOLEANS_PER_TEMP
;
955 if (info
->func
[page
] & PMBUS_HAVE_TEMP2
) {
956 max_sensors
+= PMBUS_MAX_SENSORS_PER_TEMP
;
957 max_booleans
+= PMBUS_MAX_BOOLEANS_PER_TEMP
;
959 if (info
->func
[page
] & PMBUS_HAVE_TEMP3
) {
960 max_sensors
+= PMBUS_MAX_SENSORS_PER_TEMP
;
961 max_booleans
+= PMBUS_MAX_BOOLEANS_PER_TEMP
;
964 data
->max_sensors
= max_sensors
;
965 data
->max_booleans
= max_booleans
;
966 data
->max_labels
= max_labels
;
967 data
->max_attributes
= max_sensors
+ max_booleans
+ max_labels
;
971 * Search for attributes. Allocate sensors, booleans, and labels as needed.
975 * The pmbus_limit_attr structure describes a single limit attribute
976 * and its associated alarm attribute.
978 struct pmbus_limit_attr
{
979 u16 reg
; /* Limit register */
980 bool update
; /* True if register needs updates */
981 const char *attr
; /* Attribute name */
982 const char *alarm
; /* Alarm attribute name */
983 u32 sbit
; /* Alarm attribute status bit */
987 * The pmbus_sensor_attr structure describes one sensor attribute. This
988 * description includes a reference to the associated limit attributes.
990 struct pmbus_sensor_attr
{
991 u8 reg
; /* sensor register */
992 enum pmbus_sensor_classes
class;/* sensor class */
993 const char *label
; /* sensor label */
994 bool paged
; /* true if paged sensor */
995 bool update
; /* true if update needed */
996 bool compare
; /* true if compare function needed */
997 u32 func
; /* sensor mask */
998 u32 sfunc
; /* sensor status mask */
999 int sbase
; /* status base register */
1000 u32 gbit
; /* generic status bit */
1001 const struct pmbus_limit_attr
*limit
;/* limit registers */
1002 int nlimit
; /* # of limit registers */
1006 * Add a set of limit attributes and, if supported, the associated
1009 static bool pmbus_add_limit_attrs(struct i2c_client
*client
,
1010 struct pmbus_data
*data
,
1011 const struct pmbus_driver_info
*info
,
1012 const char *name
, int index
, int page
,
1014 const struct pmbus_sensor_attr
*attr
)
1016 const struct pmbus_limit_attr
*l
= attr
->limit
;
1017 int nlimit
= attr
->nlimit
;
1018 bool have_alarm
= false;
1021 for (i
= 0; i
< nlimit
; i
++) {
1022 if (pmbus_check_word_register(client
, page
, l
->reg
)) {
1023 cindex
= data
->num_sensors
;
1024 pmbus_add_sensor(data
, name
, l
->attr
, index
, page
,
1025 l
->reg
, attr
->class,
1026 attr
->update
|| l
->update
,
1028 if (l
->sbit
&& (info
->func
[page
] & attr
->sfunc
)) {
1029 if (attr
->compare
) {
1030 pmbus_add_boolean_cmp(data
, name
,
1033 attr
->sbase
+ page
, l
->sbit
);
1035 pmbus_add_boolean_reg(data
, name
,
1037 attr
->sbase
+ page
, l
->sbit
);
1047 static void pmbus_add_sensor_attrs_one(struct i2c_client
*client
,
1048 struct pmbus_data
*data
,
1049 const struct pmbus_driver_info
*info
,
1051 int index
, int page
,
1052 const struct pmbus_sensor_attr
*attr
)
1055 int cbase
= data
->num_sensors
;
1058 pmbus_add_label(data
, name
, index
, attr
->label
,
1059 attr
->paged
? page
+ 1 : 0);
1060 pmbus_add_sensor(data
, name
, "input", index
, page
, attr
->reg
,
1061 attr
->class, true, true);
1063 have_alarm
= pmbus_add_limit_attrs(client
, data
, info
, name
,
1064 index
, page
, cbase
, attr
);
1066 * Add generic alarm attribute only if there are no individual
1067 * alarm attributes, if there is a global alarm bit, and if
1068 * the generic status register for this page is accessible.
1070 if (!have_alarm
&& attr
->gbit
&&
1071 pmbus_check_byte_register(client
, page
, PMBUS_STATUS_BYTE
))
1072 pmbus_add_boolean_reg(data
, name
, "alarm", index
,
1073 PB_STATUS_BASE
+ page
,
1078 static void pmbus_add_sensor_attrs(struct i2c_client
*client
,
1079 struct pmbus_data
*data
,
1081 const struct pmbus_sensor_attr
*attrs
,
1084 const struct pmbus_driver_info
*info
= data
->info
;
1088 for (i
= 0; i
< nattrs
; i
++) {
1091 pages
= attrs
->paged
? info
->pages
: 1;
1092 for (page
= 0; page
< pages
; page
++) {
1093 if (!(info
->func
[page
] & attrs
->func
))
1095 pmbus_add_sensor_attrs_one(client
, data
, info
, name
,
1096 index
, page
, attrs
);
1103 static const struct pmbus_limit_attr vin_limit_attrs
[] = {
1105 .reg
= PMBUS_VIN_UV_WARN_LIMIT
,
1107 .alarm
= "min_alarm",
1108 .sbit
= PB_VOLTAGE_UV_WARNING
,
1110 .reg
= PMBUS_VIN_UV_FAULT_LIMIT
,
1112 .alarm
= "lcrit_alarm",
1113 .sbit
= PB_VOLTAGE_UV_FAULT
,
1115 .reg
= PMBUS_VIN_OV_WARN_LIMIT
,
1117 .alarm
= "max_alarm",
1118 .sbit
= PB_VOLTAGE_OV_WARNING
,
1120 .reg
= PMBUS_VIN_OV_FAULT_LIMIT
,
1122 .alarm
= "crit_alarm",
1123 .sbit
= PB_VOLTAGE_OV_FAULT
,
1125 .reg
= PMBUS_VIRT_READ_VIN_AVG
,
1129 .reg
= PMBUS_VIRT_READ_VIN_MIN
,
1133 .reg
= PMBUS_VIRT_READ_VIN_MAX
,
1137 .reg
= PMBUS_VIRT_RESET_VIN_HISTORY
,
1138 .attr
= "reset_history",
1142 static const struct pmbus_limit_attr vout_limit_attrs
[] = {
1144 .reg
= PMBUS_VOUT_UV_WARN_LIMIT
,
1146 .alarm
= "min_alarm",
1147 .sbit
= PB_VOLTAGE_UV_WARNING
,
1149 .reg
= PMBUS_VOUT_UV_FAULT_LIMIT
,
1151 .alarm
= "lcrit_alarm",
1152 .sbit
= PB_VOLTAGE_UV_FAULT
,
1154 .reg
= PMBUS_VOUT_OV_WARN_LIMIT
,
1156 .alarm
= "max_alarm",
1157 .sbit
= PB_VOLTAGE_OV_WARNING
,
1159 .reg
= PMBUS_VOUT_OV_FAULT_LIMIT
,
1161 .alarm
= "crit_alarm",
1162 .sbit
= PB_VOLTAGE_OV_FAULT
,
1164 .reg
= PMBUS_VIRT_READ_VOUT_AVG
,
1168 .reg
= PMBUS_VIRT_READ_VOUT_MIN
,
1172 .reg
= PMBUS_VIRT_READ_VOUT_MAX
,
1176 .reg
= PMBUS_VIRT_RESET_VOUT_HISTORY
,
1177 .attr
= "reset_history",
1181 static const struct pmbus_sensor_attr voltage_attributes
[] = {
1183 .reg
= PMBUS_READ_VIN
,
1184 .class = PSC_VOLTAGE_IN
,
1186 .func
= PMBUS_HAVE_VIN
,
1187 .sfunc
= PMBUS_HAVE_STATUS_INPUT
,
1188 .sbase
= PB_STATUS_INPUT_BASE
,
1189 .gbit
= PB_STATUS_VIN_UV
,
1190 .limit
= vin_limit_attrs
,
1191 .nlimit
= ARRAY_SIZE(vin_limit_attrs
),
1193 .reg
= PMBUS_READ_VCAP
,
1194 .class = PSC_VOLTAGE_IN
,
1196 .func
= PMBUS_HAVE_VCAP
,
1198 .reg
= PMBUS_READ_VOUT
,
1199 .class = PSC_VOLTAGE_OUT
,
1202 .func
= PMBUS_HAVE_VOUT
,
1203 .sfunc
= PMBUS_HAVE_STATUS_VOUT
,
1204 .sbase
= PB_STATUS_VOUT_BASE
,
1205 .gbit
= PB_STATUS_VOUT_OV
,
1206 .limit
= vout_limit_attrs
,
1207 .nlimit
= ARRAY_SIZE(vout_limit_attrs
),
1211 /* Current attributes */
1213 static const struct pmbus_limit_attr iin_limit_attrs
[] = {
1215 .reg
= PMBUS_IIN_OC_WARN_LIMIT
,
1217 .alarm
= "max_alarm",
1218 .sbit
= PB_IIN_OC_WARNING
,
1220 .reg
= PMBUS_IIN_OC_FAULT_LIMIT
,
1222 .alarm
= "crit_alarm",
1223 .sbit
= PB_IIN_OC_FAULT
,
1225 .reg
= PMBUS_VIRT_READ_IIN_AVG
,
1229 .reg
= PMBUS_VIRT_READ_IIN_MIN
,
1233 .reg
= PMBUS_VIRT_READ_IIN_MAX
,
1237 .reg
= PMBUS_VIRT_RESET_IIN_HISTORY
,
1238 .attr
= "reset_history",
1242 static const struct pmbus_limit_attr iout_limit_attrs
[] = {
1244 .reg
= PMBUS_IOUT_OC_WARN_LIMIT
,
1246 .alarm
= "max_alarm",
1247 .sbit
= PB_IOUT_OC_WARNING
,
1249 .reg
= PMBUS_IOUT_UC_FAULT_LIMIT
,
1251 .alarm
= "lcrit_alarm",
1252 .sbit
= PB_IOUT_UC_FAULT
,
1254 .reg
= PMBUS_IOUT_OC_FAULT_LIMIT
,
1256 .alarm
= "crit_alarm",
1257 .sbit
= PB_IOUT_OC_FAULT
,
1259 .reg
= PMBUS_VIRT_READ_IOUT_AVG
,
1263 .reg
= PMBUS_VIRT_READ_IOUT_MIN
,
1267 .reg
= PMBUS_VIRT_READ_IOUT_MAX
,
1271 .reg
= PMBUS_VIRT_RESET_IOUT_HISTORY
,
1272 .attr
= "reset_history",
1276 static const struct pmbus_sensor_attr current_attributes
[] = {
1278 .reg
= PMBUS_READ_IIN
,
1279 .class = PSC_CURRENT_IN
,
1281 .func
= PMBUS_HAVE_IIN
,
1282 .sfunc
= PMBUS_HAVE_STATUS_INPUT
,
1283 .sbase
= PB_STATUS_INPUT_BASE
,
1284 .limit
= iin_limit_attrs
,
1285 .nlimit
= ARRAY_SIZE(iin_limit_attrs
),
1287 .reg
= PMBUS_READ_IOUT
,
1288 .class = PSC_CURRENT_OUT
,
1291 .func
= PMBUS_HAVE_IOUT
,
1292 .sfunc
= PMBUS_HAVE_STATUS_IOUT
,
1293 .sbase
= PB_STATUS_IOUT_BASE
,
1294 .gbit
= PB_STATUS_IOUT_OC
,
1295 .limit
= iout_limit_attrs
,
1296 .nlimit
= ARRAY_SIZE(iout_limit_attrs
),
1300 /* Power attributes */
1302 static const struct pmbus_limit_attr pin_limit_attrs
[] = {
1304 .reg
= PMBUS_PIN_OP_WARN_LIMIT
,
1307 .sbit
= PB_PIN_OP_WARNING
,
1309 .reg
= PMBUS_VIRT_READ_PIN_AVG
,
1313 .reg
= PMBUS_VIRT_READ_PIN_MAX
,
1315 .attr
= "input_highest",
1317 .reg
= PMBUS_VIRT_RESET_PIN_HISTORY
,
1318 .attr
= "reset_history",
1322 static const struct pmbus_limit_attr pout_limit_attrs
[] = {
1324 .reg
= PMBUS_POUT_MAX
,
1326 .alarm
= "cap_alarm",
1327 .sbit
= PB_POWER_LIMITING
,
1329 .reg
= PMBUS_POUT_OP_WARN_LIMIT
,
1331 .alarm
= "max_alarm",
1332 .sbit
= PB_POUT_OP_WARNING
,
1334 .reg
= PMBUS_POUT_OP_FAULT_LIMIT
,
1336 .alarm
= "crit_alarm",
1337 .sbit
= PB_POUT_OP_FAULT
,
1341 static const struct pmbus_sensor_attr power_attributes
[] = {
1343 .reg
= PMBUS_READ_PIN
,
1346 .func
= PMBUS_HAVE_PIN
,
1347 .sfunc
= PMBUS_HAVE_STATUS_INPUT
,
1348 .sbase
= PB_STATUS_INPUT_BASE
,
1349 .limit
= pin_limit_attrs
,
1350 .nlimit
= ARRAY_SIZE(pin_limit_attrs
),
1352 .reg
= PMBUS_READ_POUT
,
1356 .func
= PMBUS_HAVE_POUT
,
1357 .sfunc
= PMBUS_HAVE_STATUS_IOUT
,
1358 .sbase
= PB_STATUS_IOUT_BASE
,
1359 .limit
= pout_limit_attrs
,
1360 .nlimit
= ARRAY_SIZE(pout_limit_attrs
),
1364 /* Temperature atributes */
1366 static const struct pmbus_limit_attr temp_limit_attrs
[] = {
1368 .reg
= PMBUS_UT_WARN_LIMIT
,
1370 .alarm
= "min_alarm",
1371 .sbit
= PB_TEMP_UT_WARNING
,
1373 .reg
= PMBUS_UT_FAULT_LIMIT
,
1375 .alarm
= "lcrit_alarm",
1376 .sbit
= PB_TEMP_UT_FAULT
,
1378 .reg
= PMBUS_OT_WARN_LIMIT
,
1380 .alarm
= "max_alarm",
1381 .sbit
= PB_TEMP_OT_WARNING
,
1383 .reg
= PMBUS_OT_FAULT_LIMIT
,
1385 .alarm
= "crit_alarm",
1386 .sbit
= PB_TEMP_OT_FAULT
,
1388 .reg
= PMBUS_VIRT_READ_TEMP_MIN
,
1391 .reg
= PMBUS_VIRT_READ_TEMP_MAX
,
1394 .reg
= PMBUS_VIRT_RESET_TEMP_HISTORY
,
1395 .attr
= "reset_history",
1399 static const struct pmbus_limit_attr temp_limit_attrs23
[] = {
1401 .reg
= PMBUS_UT_WARN_LIMIT
,
1403 .alarm
= "min_alarm",
1404 .sbit
= PB_TEMP_UT_WARNING
,
1406 .reg
= PMBUS_UT_FAULT_LIMIT
,
1408 .alarm
= "lcrit_alarm",
1409 .sbit
= PB_TEMP_UT_FAULT
,
1411 .reg
= PMBUS_OT_WARN_LIMIT
,
1413 .alarm
= "max_alarm",
1414 .sbit
= PB_TEMP_OT_WARNING
,
1416 .reg
= PMBUS_OT_FAULT_LIMIT
,
1418 .alarm
= "crit_alarm",
1419 .sbit
= PB_TEMP_OT_FAULT
,
1423 static const struct pmbus_sensor_attr temp_attributes
[] = {
1425 .reg
= PMBUS_READ_TEMPERATURE_1
,
1426 .class = PSC_TEMPERATURE
,
1430 .func
= PMBUS_HAVE_TEMP
,
1431 .sfunc
= PMBUS_HAVE_STATUS_TEMP
,
1432 .sbase
= PB_STATUS_TEMP_BASE
,
1433 .gbit
= PB_STATUS_TEMPERATURE
,
1434 .limit
= temp_limit_attrs
,
1435 .nlimit
= ARRAY_SIZE(temp_limit_attrs
),
1437 .reg
= PMBUS_READ_TEMPERATURE_2
,
1438 .class = PSC_TEMPERATURE
,
1442 .func
= PMBUS_HAVE_TEMP2
,
1443 .sfunc
= PMBUS_HAVE_STATUS_TEMP
,
1444 .sbase
= PB_STATUS_TEMP_BASE
,
1445 .gbit
= PB_STATUS_TEMPERATURE
,
1446 .limit
= temp_limit_attrs23
,
1447 .nlimit
= ARRAY_SIZE(temp_limit_attrs23
),
1449 .reg
= PMBUS_READ_TEMPERATURE_3
,
1450 .class = PSC_TEMPERATURE
,
1454 .func
= PMBUS_HAVE_TEMP3
,
1455 .sfunc
= PMBUS_HAVE_STATUS_TEMP
,
1456 .sbase
= PB_STATUS_TEMP_BASE
,
1457 .gbit
= PB_STATUS_TEMPERATURE
,
1458 .limit
= temp_limit_attrs23
,
1459 .nlimit
= ARRAY_SIZE(temp_limit_attrs23
),
1463 static const int pmbus_fan_registers
[] = {
1464 PMBUS_READ_FAN_SPEED_1
,
1465 PMBUS_READ_FAN_SPEED_2
,
1466 PMBUS_READ_FAN_SPEED_3
,
1467 PMBUS_READ_FAN_SPEED_4
1470 static const int pmbus_fan_config_registers
[] = {
1471 PMBUS_FAN_CONFIG_12
,
1472 PMBUS_FAN_CONFIG_12
,
1473 PMBUS_FAN_CONFIG_34
,
1477 static const int pmbus_fan_status_registers
[] = {
1478 PMBUS_STATUS_FAN_12
,
1479 PMBUS_STATUS_FAN_12
,
1480 PMBUS_STATUS_FAN_34
,
1484 static const u32 pmbus_fan_flags
[] = {
1491 static const u32 pmbus_fan_status_flags
[] = {
1492 PMBUS_HAVE_STATUS_FAN12
,
1493 PMBUS_HAVE_STATUS_FAN12
,
1494 PMBUS_HAVE_STATUS_FAN34
,
1495 PMBUS_HAVE_STATUS_FAN34
1499 static void pmbus_add_fan_attributes(struct i2c_client
*client
,
1500 struct pmbus_data
*data
)
1502 const struct pmbus_driver_info
*info
= data
->info
;
1506 for (page
= 0; page
< info
->pages
; page
++) {
1509 for (f
= 0; f
< ARRAY_SIZE(pmbus_fan_registers
); f
++) {
1512 if (!(info
->func
[page
] & pmbus_fan_flags
[f
]))
1515 if (!pmbus_check_word_register(client
, page
,
1516 pmbus_fan_registers
[f
]))
1520 * Skip fan if not installed.
1521 * Each fan configuration register covers multiple fans,
1522 * so we have to do some magic.
1524 regval
= _pmbus_read_byte_data(client
, page
,
1525 pmbus_fan_config_registers
[f
]);
1527 (!(regval
& (PB_FAN_1_INSTALLED
>> ((f
& 1) * 4)))))
1530 pmbus_add_sensor(data
, "fan", "input", index
, page
,
1531 pmbus_fan_registers
[f
], PSC_FAN
, true,
1535 * Each fan status register covers multiple fans,
1536 * so we have to do some magic.
1538 if ((info
->func
[page
] & pmbus_fan_status_flags
[f
]) &&
1539 pmbus_check_byte_register(client
,
1540 page
, pmbus_fan_status_registers
[f
])) {
1543 if (f
> 1) /* fan 3, 4 */
1544 base
= PB_STATUS_FAN34_BASE
+ page
;
1546 base
= PB_STATUS_FAN_BASE
+ page
;
1547 pmbus_add_boolean_reg(data
, "fan", "alarm",
1549 PB_FAN_FAN1_WARNING
>> (f
& 1));
1550 pmbus_add_boolean_reg(data
, "fan", "fault",
1552 PB_FAN_FAN1_FAULT
>> (f
& 1));
1559 static void pmbus_find_attributes(struct i2c_client
*client
,
1560 struct pmbus_data
*data
)
1562 /* Voltage sensors */
1563 pmbus_add_sensor_attrs(client
, data
, "in", voltage_attributes
,
1564 ARRAY_SIZE(voltage_attributes
));
1566 /* Current sensors */
1567 pmbus_add_sensor_attrs(client
, data
, "curr", current_attributes
,
1568 ARRAY_SIZE(current_attributes
));
1571 pmbus_add_sensor_attrs(client
, data
, "power", power_attributes
,
1572 ARRAY_SIZE(power_attributes
));
1574 /* Temperature sensors */
1575 pmbus_add_sensor_attrs(client
, data
, "temp", temp_attributes
,
1576 ARRAY_SIZE(temp_attributes
));
1579 pmbus_add_fan_attributes(client
, data
);
1583 * Identify chip parameters.
1584 * This function is called for all chips.
1586 static int pmbus_identify_common(struct i2c_client
*client
,
1587 struct pmbus_data
*data
)
1589 int vout_mode
= -1, exponent
;
1591 if (pmbus_check_byte_register(client
, 0, PMBUS_VOUT_MODE
))
1592 vout_mode
= pmbus_read_byte_data(client
, 0, PMBUS_VOUT_MODE
);
1593 if (vout_mode
>= 0 && vout_mode
!= 0xff) {
1595 * Not all chips support the VOUT_MODE command,
1596 * so a failure to read it is not an error.
1598 switch (vout_mode
>> 5) {
1599 case 0: /* linear mode */
1600 if (data
->info
->format
[PSC_VOLTAGE_OUT
] != linear
)
1603 exponent
= vout_mode
& 0x1f;
1604 /* and sign-extend it */
1605 if (exponent
& 0x10)
1607 data
->exponent
= exponent
;
1609 case 1: /* VID mode */
1610 if (data
->info
->format
[PSC_VOLTAGE_OUT
] != vid
)
1613 case 2: /* direct mode */
1614 if (data
->info
->format
[PSC_VOLTAGE_OUT
] != direct
)
1622 /* Determine maximum number of sensors, booleans, and labels */
1623 pmbus_find_max_attr(client
, data
);
1624 pmbus_clear_fault_page(client
, 0);
1628 int pmbus_do_probe(struct i2c_client
*client
, const struct i2c_device_id
*id
,
1629 struct pmbus_driver_info
*info
)
1631 const struct pmbus_platform_data
*pdata
= client
->dev
.platform_data
;
1632 struct pmbus_data
*data
;
1636 dev_err(&client
->dev
, "Missing chip information");
1640 if (!i2c_check_functionality(client
->adapter
, I2C_FUNC_SMBUS_WRITE_BYTE
1641 | I2C_FUNC_SMBUS_BYTE_DATA
1642 | I2C_FUNC_SMBUS_WORD_DATA
))
1645 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
1647 dev_err(&client
->dev
, "No memory to allocate driver data\n");
1651 i2c_set_clientdata(client
, data
);
1652 mutex_init(&data
->update_lock
);
1654 /* Bail out if PMBus status register does not exist. */
1655 if (i2c_smbus_read_byte_data(client
, PMBUS_STATUS_BYTE
) < 0) {
1656 dev_err(&client
->dev
, "PMBus status register not found\n");
1662 data
->flags
= pdata
->flags
;
1665 pmbus_clear_faults(client
);
1667 if (info
->identify
) {
1668 ret
= (*info
->identify
)(client
, info
);
1670 dev_err(&client
->dev
, "Chip identification failed\n");
1675 if (info
->pages
<= 0 || info
->pages
> PMBUS_PAGES
) {
1676 dev_err(&client
->dev
, "Bad number of PMBus pages: %d\n",
1682 ret
= pmbus_identify_common(client
, data
);
1684 dev_err(&client
->dev
, "Failed to identify chip capabilities\n");
1689 data
->sensors
= kzalloc(sizeof(struct pmbus_sensor
) * data
->max_sensors
,
1691 if (!data
->sensors
) {
1692 dev_err(&client
->dev
, "No memory to allocate sensor data\n");
1696 data
->booleans
= kzalloc(sizeof(struct pmbus_boolean
)
1697 * data
->max_booleans
, GFP_KERNEL
);
1698 if (!data
->booleans
) {
1699 dev_err(&client
->dev
, "No memory to allocate boolean data\n");
1703 data
->labels
= kzalloc(sizeof(struct pmbus_label
) * data
->max_labels
,
1705 if (!data
->labels
) {
1706 dev_err(&client
->dev
, "No memory to allocate label data\n");
1710 data
->attributes
= kzalloc(sizeof(struct attribute
*)
1711 * data
->max_attributes
, GFP_KERNEL
);
1712 if (!data
->attributes
) {
1713 dev_err(&client
->dev
, "No memory to allocate attribute data\n");
1717 pmbus_find_attributes(client
, data
);
1720 * If there are no attributes, something is wrong.
1721 * Bail out instead of trying to register nothing.
1723 if (!data
->num_attributes
) {
1724 dev_err(&client
->dev
, "No attributes found\n");
1726 goto out_attributes
;
1729 /* Register sysfs hooks */
1730 data
->group
.attrs
= data
->attributes
;
1731 ret
= sysfs_create_group(&client
->dev
.kobj
, &data
->group
);
1733 dev_err(&client
->dev
, "Failed to create sysfs entries\n");
1734 goto out_attributes
;
1736 data
->hwmon_dev
= hwmon_device_register(&client
->dev
);
1737 if (IS_ERR(data
->hwmon_dev
)) {
1738 ret
= PTR_ERR(data
->hwmon_dev
);
1739 dev_err(&client
->dev
, "Failed to register hwmon device\n");
1740 goto out_hwmon_device_register
;
1744 out_hwmon_device_register
:
1745 sysfs_remove_group(&client
->dev
.kobj
, &data
->group
);
1747 kfree(data
->attributes
);
1749 kfree(data
->labels
);
1751 kfree(data
->booleans
);
1753 kfree(data
->sensors
);
1758 EXPORT_SYMBOL_GPL(pmbus_do_probe
);
1760 int pmbus_do_remove(struct i2c_client
*client
)
1762 struct pmbus_data
*data
= i2c_get_clientdata(client
);
1763 hwmon_device_unregister(data
->hwmon_dev
);
1764 sysfs_remove_group(&client
->dev
.kobj
, &data
->group
);
1765 kfree(data
->attributes
);
1766 kfree(data
->labels
);
1767 kfree(data
->booleans
);
1768 kfree(data
->sensors
);
1772 EXPORT_SYMBOL_GPL(pmbus_do_remove
);
1774 MODULE_AUTHOR("Guenter Roeck");
1775 MODULE_DESCRIPTION("PMBus core driver");
1776 MODULE_LICENSE("GPL");