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