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-rw-r--r--drivers/power/Kconfig7
-rw-r--r--drivers/power/Makefile1
-rw-r--r--drivers/power/ds2780_battery.c853
-rw-r--r--drivers/w1/slaves/Kconfig13
-rw-r--r--drivers/w1/slaves/Makefile1
-rw-r--r--drivers/w1/slaves/w1_ds2780.c217
-rw-r--r--drivers/w1/slaves/w1_ds2780.h129
-rw-r--r--drivers/w1/w1_family.h1
8 files changed, 1222 insertions, 0 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 52a462fc6b84..dc8c531ed276 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -68,6 +68,13 @@ config BATTERY_DS2760
68 help 68 help
69 Say Y here to enable support for batteries with ds2760 chip. 69 Say Y here to enable support for batteries with ds2760 chip.
70 70
71config BATTERY_DS2780
72 tristate "DS2780 battery driver"
73 select W1
74 select W1_SLAVE_DS2780
75 help
76 Say Y here to enable support for batteries with ds2780 chip.
77
71config BATTERY_DS2782 78config BATTERY_DS2782
72 tristate "DS2782/DS2786 standalone gas-gauge" 79 tristate "DS2782/DS2786 standalone gas-gauge"
73 depends on I2C 80 depends on I2C
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 8385bfae8728..8224990b933d 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_WM8350_POWER) += wm8350_power.o
15obj-$(CONFIG_TEST_POWER) += test_power.o 15obj-$(CONFIG_TEST_POWER) += test_power.o
16 16
17obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o 17obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
18obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o
18obj-$(CONFIG_BATTERY_DS2782) += ds2782_battery.o 19obj-$(CONFIG_BATTERY_DS2782) += ds2782_battery.o
19obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o 20obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
20obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o 21obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
diff --git a/drivers/power/ds2780_battery.c b/drivers/power/ds2780_battery.c
new file mode 100644
index 000000000000..1fefe82e12e3
--- /dev/null
+++ b/drivers/power/ds2780_battery.c
@@ -0,0 +1,853 @@
1/*
2 * 1-wire client/driver for the Maxim/Dallas DS2780 Stand-Alone Fuel Gauge IC
3 *
4 * Copyright (C) 2010 Indesign, LLC
5 *
6 * Author: Clifton Barnes <cabarnes@indesign-llc.com>
7 *
8 * Based on ds2760_battery and ds2782_battery drivers
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 */
15
16#include <linux/module.h>
17#include <linux/slab.h>
18#include <linux/param.h>
19#include <linux/pm.h>
20#include <linux/platform_device.h>
21#include <linux/power_supply.h>
22#include <linux/idr.h>
23
24#include "../w1/w1.h"
25#include "../w1/slaves/w1_ds2780.h"
26
27/* Current unit measurement in uA for a 1 milli-ohm sense resistor */
28#define DS2780_CURRENT_UNITS 1563
29/* Charge unit measurement in uAh for a 1 milli-ohm sense resistor */
30#define DS2780_CHARGE_UNITS 6250
31/* Number of bytes in user EEPROM space */
32#define DS2780_USER_EEPROM_SIZE (DS2780_EEPROM_BLOCK0_END - \
33 DS2780_EEPROM_BLOCK0_START + 1)
34/* Number of bytes in parameter EEPROM space */
35#define DS2780_PARAM_EEPROM_SIZE (DS2780_EEPROM_BLOCK1_END - \
36 DS2780_EEPROM_BLOCK1_START + 1)
37
38struct ds2780_device_info {
39 struct device *dev;
40 struct power_supply bat;
41 struct device *w1_dev;
42};
43
44enum current_types {
45 CURRENT_NOW,
46 CURRENT_AVG,
47};
48
49static const char model[] = "DS2780";
50static const char manufacturer[] = "Maxim/Dallas";
51
52static inline struct ds2780_device_info *to_ds2780_device_info(
53 struct power_supply *psy)
54{
55 return container_of(psy, struct ds2780_device_info, bat);
56}
57
58static inline struct power_supply *to_power_supply(struct device *dev)
59{
60 return dev_get_drvdata(dev);
61}
62
63static inline int ds2780_read8(struct device *dev, u8 *val, int addr)
64{
65 return w1_ds2780_io(dev, val, addr, sizeof(u8), 0);
66}
67
68static int ds2780_read16(struct device *dev, s16 *val, int addr)
69{
70 int ret;
71 u8 raw[2];
72
73 ret = w1_ds2780_io(dev, raw, addr, sizeof(u8) * 2, 0);
74 if (ret < 0)
75 return ret;
76
77 *val = (raw[0] << 8) | raw[1];
78
79 return 0;
80}
81
82static inline int ds2780_read_block(struct device *dev, u8 *val, int addr,
83 size_t count)
84{
85 return w1_ds2780_io(dev, val, addr, count, 0);
86}
87
88static inline int ds2780_write(struct device *dev, u8 *val, int addr,
89 size_t count)
90{
91 return w1_ds2780_io(dev, val, addr, count, 1);
92}
93
94static inline int ds2780_store_eeprom(struct device *dev, int addr)
95{
96 return w1_ds2780_eeprom_cmd(dev, addr, W1_DS2780_COPY_DATA);
97}
98
99static inline int ds2780_recall_eeprom(struct device *dev, int addr)
100{
101 return w1_ds2780_eeprom_cmd(dev, addr, W1_DS2780_RECALL_DATA);
102}
103
104static int ds2780_save_eeprom(struct ds2780_device_info *dev_info, int reg)
105{
106 int ret;
107
108 ret = ds2780_store_eeprom(dev_info->w1_dev, reg);
109 if (ret < 0)
110 return ret;
111
112 ret = ds2780_recall_eeprom(dev_info->w1_dev, reg);
113 if (ret < 0)
114 return ret;
115
116 return 0;
117}
118
119/* Set sense resistor value in mhos */
120static int ds2780_set_sense_register(struct ds2780_device_info *dev_info,
121 u8 conductance)
122{
123 int ret;
124
125 ret = ds2780_write(dev_info->w1_dev, &conductance,
126 DS2780_RSNSP_REG, sizeof(u8));
127 if (ret < 0)
128 return ret;
129
130 return ds2780_save_eeprom(dev_info, DS2780_RSNSP_REG);
131}
132
133/* Get RSGAIN value from 0 to 1.999 in steps of 0.001 */
134static int ds2780_get_rsgain_register(struct ds2780_device_info *dev_info,
135 u16 *rsgain)
136{
137 return ds2780_read16(dev_info->w1_dev, rsgain, DS2780_RSGAIN_MSB_REG);
138}
139
140/* Set RSGAIN value from 0 to 1.999 in steps of 0.001 */
141static int ds2780_set_rsgain_register(struct ds2780_device_info *dev_info,
142 u16 rsgain)
143{
144 int ret;
145 u8 raw[] = {rsgain >> 8, rsgain & 0xFF};
146
147 ret = ds2780_write(dev_info->w1_dev, raw,
148 DS2780_RSGAIN_MSB_REG, sizeof(u8) * 2);
149 if (ret < 0)
150 return ret;
151
152 return ds2780_save_eeprom(dev_info, DS2780_RSGAIN_MSB_REG);
153}
154
155static int ds2780_get_voltage(struct ds2780_device_info *dev_info,
156 int *voltage_uV)
157{
158 int ret;
159 s16 voltage_raw;
160
161 /*
162 * The voltage value is located in 10 bits across the voltage MSB
163 * and LSB registers in two's compliment form
164 * Sign bit of the voltage value is in bit 7 of the voltage MSB register
165 * Bits 9 - 3 of the voltage value are in bits 6 - 0 of the
166 * voltage MSB register
167 * Bits 2 - 0 of the voltage value are in bits 7 - 5 of the
168 * voltage LSB register
169 */
170 ret = ds2780_read16(dev_info->w1_dev, &voltage_raw,
171 DS2780_VOLT_MSB_REG);
172 if (ret < 0)
173 return ret;
174
175 /*
176 * DS2780 reports voltage in units of 4.88mV, but the battery class
177 * reports in units of uV, so convert by multiplying by 4880.
178 */
179 *voltage_uV = (voltage_raw / 32) * 4880;
180 return 0;
181}
182
183static int ds2780_get_temperature(struct ds2780_device_info *dev_info,
184 int *temperature)
185{
186 int ret;
187 s16 temperature_raw;
188
189 /*
190 * The temperature value is located in 10 bits across the temperature
191 * MSB and LSB registers in two's compliment form
192 * Sign bit of the temperature value is in bit 7 of the temperature
193 * MSB register
194 * Bits 9 - 3 of the temperature value are in bits 6 - 0 of the
195 * temperature MSB register
196 * Bits 2 - 0 of the temperature value are in bits 7 - 5 of the
197 * temperature LSB register
198 */
199 ret = ds2780_read16(dev_info->w1_dev, &temperature_raw,
200 DS2780_TEMP_MSB_REG);
201 if (ret < 0)
202 return ret;
203
204 /*
205 * Temperature is measured in units of 0.125 degrees celcius, the
206 * power_supply class measures temperature in tenths of degrees
207 * celsius. The temperature value is stored as a 10 bit number, plus
208 * sign in the upper bits of a 16 bit register.
209 */
210 *temperature = ((temperature_raw / 32) * 125) / 100;
211 return 0;
212}
213
214static int ds2780_get_current(struct ds2780_device_info *dev_info,
215 enum current_types type, int *current_uA)
216{
217 int ret, sense_res;
218 s16 current_raw;
219 u8 sense_res_raw, reg_msb;
220
221 /*
222 * The units of measurement for current are dependent on the value of
223 * the sense resistor.
224 */
225 ret = ds2780_read8(dev_info->w1_dev, &sense_res_raw, DS2780_RSNSP_REG);
226 if (ret < 0)
227 return ret;
228
229 if (sense_res_raw == 0) {
230 dev_err(dev_info->dev, "sense resistor value is 0\n");
231 return -ENXIO;
232 }
233 sense_res = 1000 / sense_res_raw;
234
235 if (type == CURRENT_NOW)
236 reg_msb = DS2780_CURRENT_MSB_REG;
237 else if (type == CURRENT_AVG)
238 reg_msb = DS2780_IAVG_MSB_REG;
239 else
240 return -EINVAL;
241
242 /*
243 * The current value is located in 16 bits across the current MSB
244 * and LSB registers in two's compliment form
245 * Sign bit of the current value is in bit 7 of the current MSB register
246 * Bits 14 - 8 of the current value are in bits 6 - 0 of the current
247 * MSB register
248 * Bits 7 - 0 of the current value are in bits 7 - 0 of the current
249 * LSB register
250 */
251 ret = ds2780_read16(dev_info->w1_dev, &current_raw, reg_msb);
252 if (ret < 0)
253 return ret;
254
255 *current_uA = current_raw * (DS2780_CURRENT_UNITS / sense_res);
256 return 0;
257}
258
259static int ds2780_get_accumulated_current(struct ds2780_device_info *dev_info,
260 int *accumulated_current)
261{
262 int ret, sense_res;
263 s16 current_raw;
264 u8 sense_res_raw;
265
266 /*
267 * The units of measurement for accumulated current are dependent on
268 * the value of the sense resistor.
269 */
270 ret = ds2780_read8(dev_info->w1_dev, &sense_res_raw, DS2780_RSNSP_REG);
271 if (ret < 0)
272 return ret;
273
274 if (sense_res_raw == 0) {
275 dev_err(dev_info->dev, "sense resistor value is 0\n");
276 return -ENXIO;
277 }
278 sense_res = 1000 / sense_res_raw;
279
280 /*
281 * The ACR value is located in 16 bits across the ACR MSB and
282 * LSB registers
283 * Bits 15 - 8 of the ACR value are in bits 7 - 0 of the ACR
284 * MSB register
285 * Bits 7 - 0 of the ACR value are in bits 7 - 0 of the ACR
286 * LSB register
287 */
288 ret = ds2780_read16(dev_info->w1_dev, &current_raw, DS2780_ACR_MSB_REG);
289 if (ret < 0)
290 return ret;
291
292 *accumulated_current = current_raw * (DS2780_CHARGE_UNITS / sense_res);
293 return 0;
294}
295
296static int ds2780_get_capacity(struct ds2780_device_info *dev_info,
297 int *capacity)
298{
299 int ret;
300 u8 raw;
301
302 ret = ds2780_read8(dev_info->w1_dev, &raw, DS2780_RARC_REG);
303 if (ret < 0)
304 return ret;
305
306 *capacity = raw;
307 return raw;
308}
309
310static int ds2780_get_status(struct ds2780_device_info *dev_info, int *status)
311{
312 int ret, current_uA, capacity;
313
314 ret = ds2780_get_current(dev_info, CURRENT_NOW, &current_uA);
315 if (ret < 0)
316 return ret;
317
318 ret = ds2780_get_capacity(dev_info, &capacity);
319 if (ret < 0)
320 return ret;
321
322 if (capacity == 100)
323 *status = POWER_SUPPLY_STATUS_FULL;
324 else if (current_uA == 0)
325 *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
326 else if (current_uA < 0)
327 *status = POWER_SUPPLY_STATUS_DISCHARGING;
328 else
329 *status = POWER_SUPPLY_STATUS_CHARGING;
330
331 return 0;
332}
333
334static int ds2780_get_charge_now(struct ds2780_device_info *dev_info,
335 int *charge_now)
336{
337 int ret;
338 u16 charge_raw;
339
340 /*
341 * The RAAC value is located in 16 bits across the RAAC MSB and
342 * LSB registers
343 * Bits 15 - 8 of the RAAC value are in bits 7 - 0 of the RAAC
344 * MSB register
345 * Bits 7 - 0 of the RAAC value are in bits 7 - 0 of the RAAC
346 * LSB register
347 */
348 ret = ds2780_read16(dev_info->w1_dev, &charge_raw, DS2780_RAAC_MSB_REG);
349 if (ret < 0)
350 return ret;
351
352 *charge_now = charge_raw * 1600;
353 return 0;
354}
355
356static int ds2780_get_control_register(struct ds2780_device_info *dev_info,
357 u8 *control_reg)
358{
359 return ds2780_read8(dev_info->w1_dev, control_reg, DS2780_CONTROL_REG);
360}
361
362static int ds2780_set_control_register(struct ds2780_device_info *dev_info,
363 u8 control_reg)
364{
365 int ret;
366
367 ret = ds2780_write(dev_info->w1_dev, &control_reg,
368 DS2780_CONTROL_REG, sizeof(u8));
369 if (ret < 0)
370 return ret;
371
372 return ds2780_save_eeprom(dev_info, DS2780_CONTROL_REG);
373}
374
375static int ds2780_battery_get_property(struct power_supply *psy,
376 enum power_supply_property psp,
377 union power_supply_propval *val)
378{
379 int ret = 0;
380 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
381
382 switch (psp) {
383 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
384 ret = ds2780_get_voltage(dev_info, &val->intval);
385 break;
386
387 case POWER_SUPPLY_PROP_TEMP:
388 ret = ds2780_get_temperature(dev_info, &val->intval);
389 break;
390
391 case POWER_SUPPLY_PROP_MODEL_NAME:
392 val->strval = model;
393 break;
394
395 case POWER_SUPPLY_PROP_MANUFACTURER:
396 val->strval = manufacturer;
397 break;
398
399 case POWER_SUPPLY_PROP_CURRENT_NOW:
400 ret = ds2780_get_current(dev_info, CURRENT_NOW, &val->intval);
401 break;
402
403 case POWER_SUPPLY_PROP_CURRENT_AVG:
404 ret = ds2780_get_current(dev_info, CURRENT_AVG, &val->intval);
405 break;
406
407 case POWER_SUPPLY_PROP_STATUS:
408 ret = ds2780_get_status(dev_info, &val->intval);
409 break;
410
411 case POWER_SUPPLY_PROP_CAPACITY:
412 ret = ds2780_get_capacity(dev_info, &val->intval);
413 break;
414
415 case POWER_SUPPLY_PROP_CHARGE_COUNTER:
416 ret = ds2780_get_accumulated_current(dev_info, &val->intval);
417 break;
418
419 case POWER_SUPPLY_PROP_CHARGE_NOW:
420 ret = ds2780_get_charge_now(dev_info, &val->intval);
421 break;
422
423 default:
424 ret = -EINVAL;
425 }
426
427 return ret;
428}
429
430static enum power_supply_property ds2780_battery_props[] = {
431 POWER_SUPPLY_PROP_STATUS,
432 POWER_SUPPLY_PROP_VOLTAGE_NOW,
433 POWER_SUPPLY_PROP_TEMP,
434 POWER_SUPPLY_PROP_MODEL_NAME,
435 POWER_SUPPLY_PROP_MANUFACTURER,
436 POWER_SUPPLY_PROP_CURRENT_NOW,
437 POWER_SUPPLY_PROP_CURRENT_AVG,
438 POWER_SUPPLY_PROP_CAPACITY,
439 POWER_SUPPLY_PROP_CHARGE_COUNTER,
440 POWER_SUPPLY_PROP_CHARGE_NOW,
441};
442
443static ssize_t ds2780_get_pmod_enabled(struct device *dev,
444 struct device_attribute *attr,
445 char *buf)
446{
447 int ret;
448 u8 control_reg;
449 struct power_supply *psy = to_power_supply(dev);
450 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
451
452 /* Get power mode */
453 ret = ds2780_get_control_register(dev_info, &control_reg);
454 if (ret < 0)
455 return ret;
456
457 return sprintf(buf, "%d\n",
458 !!(control_reg & DS2780_CONTROL_REG_PMOD));
459}
460
461static ssize_t ds2780_set_pmod_enabled(struct device *dev,
462 struct device_attribute *attr,
463 const char *buf,
464 size_t count)
465{
466 int ret;
467 u8 control_reg, new_setting;
468 struct power_supply *psy = to_power_supply(dev);
469 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
470
471 /* Set power mode */
472 ret = ds2780_get_control_register(dev_info, &control_reg);
473 if (ret < 0)
474 return ret;
475
476 ret = kstrtou8(buf, 0, &new_setting);
477 if (ret < 0)
478 return ret;
479
480 if ((new_setting != 0) && (new_setting != 1)) {
481 dev_err(dev_info->dev, "Invalid pmod setting (0 or 1)\n");
482 return -EINVAL;
483 }
484
485 if (new_setting)
486 control_reg |= DS2780_CONTROL_REG_PMOD;
487 else
488 control_reg &= ~DS2780_CONTROL_REG_PMOD;
489
490 ret = ds2780_set_control_register(dev_info, control_reg);
491 if (ret < 0)
492 return ret;
493
494 return count;
495}
496
497static ssize_t ds2780_get_sense_resistor_value(struct device *dev,
498 struct device_attribute *attr,
499 char *buf)
500{
501 int ret;
502 u8 sense_resistor;
503 struct power_supply *psy = to_power_supply(dev);
504 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
505
506 ret = ds2780_read8(dev_info->w1_dev, &sense_resistor, DS2780_RSNSP_REG);
507 if (ret < 0)
508 return ret;
509
510 ret = sprintf(buf, "%d\n", sense_resistor);
511 return ret;
512}
513
514static ssize_t ds2780_set_sense_resistor_value(struct device *dev,
515 struct device_attribute *attr,
516 const char *buf,
517 size_t count)
518{
519 int ret;
520 u8 new_setting;
521 struct power_supply *psy = to_power_supply(dev);
522 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
523
524 ret = kstrtou8(buf, 0, &new_setting);
525 if (ret < 0)
526 return ret;
527
528 ret = ds2780_set_sense_register(dev_info, new_setting);
529 if (ret < 0)
530 return ret;
531
532 return count;
533}
534
535static ssize_t ds2780_get_rsgain_setting(struct device *dev,
536 struct device_attribute *attr,
537 char *buf)
538{
539 int ret;
540 u16 rsgain;
541 struct power_supply *psy = to_power_supply(dev);
542 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
543
544 ret = ds2780_get_rsgain_register(dev_info, &rsgain);
545 if (ret < 0)
546 return ret;
547
548 return sprintf(buf, "%d\n", rsgain);
549}
550
551static ssize_t ds2780_set_rsgain_setting(struct device *dev,
552 struct device_attribute *attr,
553 const char *buf,
554 size_t count)
555{
556 int ret;
557 u16 new_setting;
558 struct power_supply *psy = to_power_supply(dev);
559 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
560
561 ret = kstrtou16(buf, 0, &new_setting);
562 if (ret < 0)
563 return ret;
564
565 /* Gain can only be from 0 to 1.999 in steps of .001 */
566 if (new_setting > 1999) {
567 dev_err(dev_info->dev, "Invalid rsgain setting (0 - 1999)\n");
568 return -EINVAL;
569 }
570
571 ret = ds2780_set_rsgain_register(dev_info, new_setting);
572 if (ret < 0)
573 return ret;
574
575 return count;
576}
577
578static ssize_t ds2780_get_pio_pin(struct device *dev,
579 struct device_attribute *attr,
580 char *buf)
581{
582 int ret;
583 u8 sfr;
584 struct power_supply *psy = to_power_supply(dev);
585 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
586
587 ret = ds2780_read8(dev_info->w1_dev, &sfr, DS2780_SFR_REG);
588 if (ret < 0)
589 return ret;
590
591 ret = sprintf(buf, "%d\n", sfr & DS2780_SFR_REG_PIOSC);
592 return ret;
593}
594
595static ssize_t ds2780_set_pio_pin(struct device *dev,
596 struct device_attribute *attr,
597 const char *buf,
598 size_t count)
599{
600 int ret;
601 u8 new_setting;
602 struct power_supply *psy = to_power_supply(dev);
603 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
604
605 ret = kstrtou8(buf, 0, &new_setting);
606 if (ret < 0)
607 return ret;
608
609 if ((new_setting != 0) && (new_setting != 1)) {
610 dev_err(dev_info->dev, "Invalid pio_pin setting (0 or 1)\n");
611 return -EINVAL;
612 }
613
614 ret = ds2780_write(dev_info->w1_dev, &new_setting,
615 DS2780_SFR_REG, sizeof(u8));
616 if (ret < 0)
617 return ret;
618
619 return count;
620}
621
622static ssize_t ds2780_read_param_eeprom_bin(struct file *filp,
623 struct kobject *kobj,
624 struct bin_attribute *bin_attr,
625 char *buf, loff_t off, size_t count)
626{
627 struct device *dev = container_of(kobj, struct device, kobj);
628 struct power_supply *psy = to_power_supply(dev);
629 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
630
631 count = min_t(loff_t, count,
632 DS2780_EEPROM_BLOCK1_END -
633 DS2780_EEPROM_BLOCK1_START + 1 - off);
634
635 return ds2780_read_block(dev_info->w1_dev, buf,
636 DS2780_EEPROM_BLOCK1_START + off, count);
637}
638
639static ssize_t ds2780_write_param_eeprom_bin(struct file *filp,
640 struct kobject *kobj,
641 struct bin_attribute *bin_attr,
642 char *buf, loff_t off, size_t count)
643{
644 struct device *dev = container_of(kobj, struct device, kobj);
645 struct power_supply *psy = to_power_supply(dev);
646 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
647 int ret;
648
649 count = min_t(loff_t, count,
650 DS2780_EEPROM_BLOCK1_END -
651 DS2780_EEPROM_BLOCK1_START + 1 - off);
652
653 ret = ds2780_write(dev_info->w1_dev, buf,
654 DS2780_EEPROM_BLOCK1_START + off, count);
655 if (ret < 0)
656 return ret;
657
658 ret = ds2780_save_eeprom(dev_info, DS2780_EEPROM_BLOCK1_START);
659 if (ret < 0)
660 return ret;
661
662 return count;
663}
664
665static struct bin_attribute ds2780_param_eeprom_bin_attr = {
666 .attr = {
667 .name = "param_eeprom",
668 .mode = S_IRUGO | S_IWUSR,
669 },
670 .size = DS2780_EEPROM_BLOCK1_END - DS2780_EEPROM_BLOCK1_START + 1,
671 .read = ds2780_read_param_eeprom_bin,
672 .write = ds2780_write_param_eeprom_bin,
673};
674
675static ssize_t ds2780_read_user_eeprom_bin(struct file *filp,
676 struct kobject *kobj,
677 struct bin_attribute *bin_attr,
678 char *buf, loff_t off, size_t count)
679{
680 struct device *dev = container_of(kobj, struct device, kobj);
681 struct power_supply *psy = to_power_supply(dev);
682 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
683
684 count = min_t(loff_t, count,
685 DS2780_EEPROM_BLOCK0_END -
686 DS2780_EEPROM_BLOCK0_START + 1 - off);
687
688 return ds2780_read_block(dev_info->w1_dev, buf,
689 DS2780_EEPROM_BLOCK0_START + off, count);
690
691}
692
693static ssize_t ds2780_write_user_eeprom_bin(struct file *filp,
694 struct kobject *kobj,
695 struct bin_attribute *bin_attr,
696 char *buf, loff_t off, size_t count)
697{
698 struct device *dev = container_of(kobj, struct device, kobj);
699 struct power_supply *psy = to_power_supply(dev);
700 struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
701 int ret;
702
703 count = min_t(loff_t, count,
704 DS2780_EEPROM_BLOCK0_END -
705 DS2780_EEPROM_BLOCK0_START + 1 - off);
706
707 ret = ds2780_write(dev_info->w1_dev, buf,
708 DS2780_EEPROM_BLOCK0_START + off, count);
709 if (ret < 0)
710 return ret;
711
712 ret = ds2780_save_eeprom(dev_info, DS2780_EEPROM_BLOCK0_START);
713 if (ret < 0)
714 return ret;
715
716 return count;
717}
718
719static struct bin_attribute ds2780_user_eeprom_bin_attr = {
720 .attr = {
721 .name = "user_eeprom",
722 .mode = S_IRUGO | S_IWUSR,
723 },
724 .size = DS2780_EEPROM_BLOCK0_END - DS2780_EEPROM_BLOCK0_START + 1,
725 .read = ds2780_read_user_eeprom_bin,
726 .write = ds2780_write_user_eeprom_bin,
727};
728
729static DEVICE_ATTR(pmod_enabled, S_IRUGO | S_IWUSR, ds2780_get_pmod_enabled,
730 ds2780_set_pmod_enabled);
731static DEVICE_ATTR(sense_resistor_value, S_IRUGO | S_IWUSR,
732 ds2780_get_sense_resistor_value, ds2780_set_sense_resistor_value);
733static DEVICE_ATTR(rsgain_setting, S_IRUGO | S_IWUSR, ds2780_get_rsgain_setting,
734 ds2780_set_rsgain_setting);
735static DEVICE_ATTR(pio_pin, S_IRUGO | S_IWUSR, ds2780_get_pio_pin,
736 ds2780_set_pio_pin);
737
738
739static struct attribute *ds2780_attributes[] = {
740 &dev_attr_pmod_enabled.attr,
741 &dev_attr_sense_resistor_value.attr,
742 &dev_attr_rsgain_setting.attr,
743 &dev_attr_pio_pin.attr,
744 NULL
745};
746
747static const struct attribute_group ds2780_attr_group = {
748 .attrs = ds2780_attributes,
749};
750
751static int __devinit ds2780_battery_probe(struct platform_device *pdev)
752{
753 int ret = 0;
754 struct ds2780_device_info *dev_info;
755
756 dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL);
757 if (!dev_info) {
758 ret = -ENOMEM;
759 goto fail;
760 }
761
762 platform_set_drvdata(pdev, dev_info);
763
764 dev_info->dev = &pdev->dev;
765 dev_info->w1_dev = pdev->dev.parent;
766 dev_info->bat.name = dev_name(&pdev->dev);
767 dev_info->bat.type = POWER_SUPPLY_TYPE_BATTERY;
768 dev_info->bat.properties = ds2780_battery_props;
769 dev_info->bat.num_properties = ARRAY_SIZE(ds2780_battery_props);
770 dev_info->bat.get_property = ds2780_battery_get_property;
771
772 ret = power_supply_register(&pdev->dev, &dev_info->bat);
773 if (ret) {
774 dev_err(dev_info->dev, "failed to register battery\n");
775 goto fail_free_info;
776 }
777
778 ret = sysfs_create_group(&dev_info->bat.dev->kobj, &ds2780_attr_group);
779 if (ret) {
780 dev_err(dev_info->dev, "failed to create sysfs group\n");
781 goto fail_unregister;
782 }
783
784 ret = sysfs_create_bin_file(&dev_info->bat.dev->kobj,
785 &ds2780_param_eeprom_bin_attr);
786 if (ret) {
787 dev_err(dev_info->dev,
788 "failed to create param eeprom bin file");
789 goto fail_remove_group;
790 }
791
792 ret = sysfs_create_bin_file(&dev_info->bat.dev->kobj,
793 &ds2780_user_eeprom_bin_attr);
794 if (ret) {
795 dev_err(dev_info->dev,
796 "failed to create user eeprom bin file");
797 goto fail_remove_bin_file;
798 }
799
800 return 0;
801
802fail_remove_bin_file:
803 sysfs_remove_bin_file(&dev_info->bat.dev->kobj,
804 &ds2780_param_eeprom_bin_attr);
805fail_remove_group:
806 sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2780_attr_group);
807fail_unregister:
808 power_supply_unregister(&dev_info->bat);
809fail_free_info:
810 kfree(dev_info);
811fail:
812 return ret;
813}
814
815static int __devexit ds2780_battery_remove(struct platform_device *pdev)
816{
817 struct ds2780_device_info *dev_info = platform_get_drvdata(pdev);
818
819 /* remove attributes */
820 sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2780_attr_group);
821
822 power_supply_unregister(&dev_info->bat);
823
824 kfree(dev_info);
825 return 0;
826}
827
828MODULE_ALIAS("platform:ds2780-battery");
829
830static struct platform_driver ds2780_battery_driver = {
831 .driver = {
832 .name = "ds2780-battery",
833 },
834 .probe = ds2780_battery_probe,
835 .remove = ds2780_battery_remove,
836};
837
838static int __init ds2780_battery_init(void)
839{
840 return platform_driver_register(&ds2780_battery_driver);
841}
842
843static void __exit ds2780_battery_exit(void)
844{
845 platform_driver_unregister(&ds2780_battery_driver);
846}
847
848module_init(ds2780_battery_init);
849module_exit(ds2780_battery_exit);
850
851MODULE_LICENSE("GPL");
852MODULE_AUTHOR("Clifton Barnes <cabarnes@indesign-llc.com>");
853MODULE_DESCRIPTION("Maxim/Dallas DS2780 Stand-Alone Fuel Gauage IC driver");
diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig
index cd1b72411bd4..d0cb01b42012 100644
--- a/drivers/w1/slaves/Kconfig
+++ b/drivers/w1/slaves/Kconfig
@@ -68,6 +68,19 @@ config W1_SLAVE_DS2760
68 68
69 If you are unsure, say N. 69 If you are unsure, say N.
70 70
71config W1_SLAVE_DS2780
72 tristate "Dallas 2780 battery monitor chip"
73 depends on W1
74 help
75 If you enable this you will have the DS2780 battery monitor
76 chip support.
77
78 The battery monitor chip is used in many batteries/devices
79 as the one who is responsible for charging/discharging/monitoring
80 Li+ batteries.
81
82 If you are unsure, say N.
83
71config W1_SLAVE_BQ27000 84config W1_SLAVE_BQ27000
72 tristate "BQ27000 slave support" 85 tristate "BQ27000 slave support"
73 depends on W1 86 depends on W1
diff --git a/drivers/w1/slaves/Makefile b/drivers/w1/slaves/Makefile
index 75e3913910bb..1f31e9fb0b25 100644
--- a/drivers/w1/slaves/Makefile
+++ b/drivers/w1/slaves/Makefile
@@ -9,4 +9,5 @@ obj-$(CONFIG_W1_SLAVE_DS2423) += w1_ds2423.o
9obj-$(CONFIG_W1_SLAVE_DS2431) += w1_ds2431.o 9obj-$(CONFIG_W1_SLAVE_DS2431) += w1_ds2431.o
10obj-$(CONFIG_W1_SLAVE_DS2433) += w1_ds2433.o 10obj-$(CONFIG_W1_SLAVE_DS2433) += w1_ds2433.o
11obj-$(CONFIG_W1_SLAVE_DS2760) += w1_ds2760.o 11obj-$(CONFIG_W1_SLAVE_DS2760) += w1_ds2760.o
12obj-$(CONFIG_W1_SLAVE_DS2780) += w1_ds2780.o
12obj-$(CONFIG_W1_SLAVE_BQ27000) += w1_bq27000.o 13obj-$(CONFIG_W1_SLAVE_BQ27000) += w1_bq27000.o
diff --git a/drivers/w1/slaves/w1_ds2780.c b/drivers/w1/slaves/w1_ds2780.c
new file mode 100644
index 000000000000..274c8f38303f
--- /dev/null
+++ b/drivers/w1/slaves/w1_ds2780.c
@@ -0,0 +1,217 @@
1/*
2 * 1-Wire implementation for the ds2780 chip
3 *
4 * Copyright (C) 2010 Indesign, LLC
5 *
6 * Author: Clifton Barnes <cabarnes@indesign-llc.com>
7 *
8 * Based on w1-ds2760 driver
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/device.h>
19#include <linux/types.h>
20#include <linux/platform_device.h>
21#include <linux/mutex.h>
22#include <linux/idr.h>
23
24#include "../w1.h"
25#include "../w1_int.h"
26#include "../w1_family.h"
27#include "w1_ds2780.h"
28
29int w1_ds2780_io(struct device *dev, char *buf, int addr, size_t count,
30 int io)
31{
32 struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
33
34 if (!dev)
35 return -ENODEV;
36
37 mutex_lock(&sl->master->mutex);
38
39 if (addr > DS2780_DATA_SIZE || addr < 0) {
40 count = 0;
41 goto out;
42 }
43 count = min_t(int, count, DS2780_DATA_SIZE - addr);
44
45 if (w1_reset_select_slave(sl) == 0) {
46 if (io) {
47 w1_write_8(sl->master, W1_DS2780_WRITE_DATA);
48 w1_write_8(sl->master, addr);
49 w1_write_block(sl->master, buf, count);
50 /* XXX w1_write_block returns void, not n_written */
51 } else {
52 w1_write_8(sl->master, W1_DS2780_READ_DATA);
53 w1_write_8(sl->master, addr);
54 count = w1_read_block(sl->master, buf, count);
55 }
56 }
57
58out:
59 mutex_unlock(&sl->master->mutex);
60
61 return count;
62}
63EXPORT_SYMBOL(w1_ds2780_io);
64
65int w1_ds2780_eeprom_cmd(struct device *dev, int addr, int cmd)
66{
67 struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
68
69 if (!dev)
70 return -EINVAL;
71
72 mutex_lock(&sl->master->mutex);
73
74 if (w1_reset_select_slave(sl) == 0) {
75 w1_write_8(sl->master, cmd);
76 w1_write_8(sl->master, addr);
77 }
78
79 mutex_unlock(&sl->master->mutex);
80 return 0;
81}
82EXPORT_SYMBOL(w1_ds2780_eeprom_cmd);
83
84static ssize_t w1_ds2780_read_bin(struct file *filp,
85 struct kobject *kobj,
86 struct bin_attribute *bin_attr,
87 char *buf, loff_t off, size_t count)
88{
89 struct device *dev = container_of(kobj, struct device, kobj);
90 return w1_ds2780_io(dev, buf, off, count, 0);
91}
92
93static struct bin_attribute w1_ds2780_bin_attr = {
94 .attr = {
95 .name = "w1_slave",
96 .mode = S_IRUGO,
97 },
98 .size = DS2780_DATA_SIZE,
99 .read = w1_ds2780_read_bin,
100};
101
102static DEFINE_IDR(bat_idr);
103static DEFINE_MUTEX(bat_idr_lock);
104
105static int new_bat_id(void)
106{
107 int ret;
108
109 while (1) {
110 int id;
111
112 ret = idr_pre_get(&bat_idr, GFP_KERNEL);
113 if (ret == 0)
114 return -ENOMEM;
115
116 mutex_lock(&bat_idr_lock);
117 ret = idr_get_new(&bat_idr, NULL, &id);
118 mutex_unlock(&bat_idr_lock);
119
120 if (ret == 0) {
121 ret = id & MAX_ID_MASK;
122 break;
123 } else if (ret == -EAGAIN) {
124 continue;
125 } else {
126 break;
127 }
128 }
129
130 return ret;
131}
132
133static void release_bat_id(int id)
134{
135 mutex_lock(&bat_idr_lock);
136 idr_remove(&bat_idr, id);
137 mutex_unlock(&bat_idr_lock);
138}
139
140static int w1_ds2780_add_slave(struct w1_slave *sl)
141{
142 int ret;
143 int id;
144 struct platform_device *pdev;
145
146 id = new_bat_id();
147 if (id < 0) {
148 ret = id;
149 goto noid;
150 }
151
152 pdev = platform_device_alloc("ds2780-battery", id);
153 if (!pdev) {
154 ret = -ENOMEM;
155 goto pdev_alloc_failed;
156 }
157 pdev->dev.parent = &sl->dev;
158
159 ret = platform_device_add(pdev);
160 if (ret)
161 goto pdev_add_failed;
162
163 ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2780_bin_attr);
164 if (ret)
165 goto bin_attr_failed;
166
167 dev_set_drvdata(&sl->dev, pdev);
168
169 return 0;
170
171bin_attr_failed:
172pdev_add_failed:
173 platform_device_unregister(pdev);
174pdev_alloc_failed:
175 release_bat_id(id);
176noid:
177 return ret;
178}
179
180static void w1_ds2780_remove_slave(struct w1_slave *sl)
181{
182 struct platform_device *pdev = dev_get_drvdata(&sl->dev);
183 int id = pdev->id;
184
185 platform_device_unregister(pdev);
186 release_bat_id(id);
187 sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2780_bin_attr);
188}
189
190static struct w1_family_ops w1_ds2780_fops = {
191 .add_slave = w1_ds2780_add_slave,
192 .remove_slave = w1_ds2780_remove_slave,
193};
194
195static struct w1_family w1_ds2780_family = {
196 .fid = W1_FAMILY_DS2780,
197 .fops = &w1_ds2780_fops,
198};
199
200static int __init w1_ds2780_init(void)
201{
202 idr_init(&bat_idr);
203 return w1_register_family(&w1_ds2780_family);
204}
205
206static void __exit w1_ds2780_exit(void)
207{
208 w1_unregister_family(&w1_ds2780_family);
209 idr_destroy(&bat_idr);
210}
211
212module_init(w1_ds2780_init);
213module_exit(w1_ds2780_exit);
214
215MODULE_LICENSE("GPL");
216MODULE_AUTHOR("Clifton Barnes <cabarnes@indesign-llc.com>");
217MODULE_DESCRIPTION("1-wire Driver for Maxim/Dallas DS2780 Stand-Alone Fuel Gauge IC");
diff --git a/drivers/w1/slaves/w1_ds2780.h b/drivers/w1/slaves/w1_ds2780.h
new file mode 100644
index 000000000000..a1fba79eb1b5
--- /dev/null
+++ b/drivers/w1/slaves/w1_ds2780.h
@@ -0,0 +1,129 @@
1/*
2 * 1-Wire implementation for the ds2780 chip
3 *
4 * Copyright (C) 2010 Indesign, LLC
5 *
6 * Author: Clifton Barnes <cabarnes@indesign-llc.com>
7 *
8 * Based on w1-ds2760 driver
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 */
15
16#ifndef _W1_DS2780_H
17#define _W1_DS2780_H
18
19/* Function commands */
20#define W1_DS2780_READ_DATA 0x69
21#define W1_DS2780_WRITE_DATA 0x6C
22#define W1_DS2780_COPY_DATA 0x48
23#define W1_DS2780_RECALL_DATA 0xB8
24#define W1_DS2780_LOCK 0x6A
25
26/* Register map */
27/* Register 0x00 Reserved */
28#define DS2780_STATUS_REG 0x01
29#define DS2780_RAAC_MSB_REG 0x02
30#define DS2780_RAAC_LSB_REG 0x03
31#define DS2780_RSAC_MSB_REG 0x04
32#define DS2780_RSAC_LSB_REG 0x05
33#define DS2780_RARC_REG 0x06
34#define DS2780_RSRC_REG 0x07
35#define DS2780_IAVG_MSB_REG 0x08
36#define DS2780_IAVG_LSB_REG 0x09
37#define DS2780_TEMP_MSB_REG 0x0A
38#define DS2780_TEMP_LSB_REG 0x0B
39#define DS2780_VOLT_MSB_REG 0x0C
40#define DS2780_VOLT_LSB_REG 0x0D
41#define DS2780_CURRENT_MSB_REG 0x0E
42#define DS2780_CURRENT_LSB_REG 0x0F
43#define DS2780_ACR_MSB_REG 0x10
44#define DS2780_ACR_LSB_REG 0x11
45#define DS2780_ACRL_MSB_REG 0x12
46#define DS2780_ACRL_LSB_REG 0x13
47#define DS2780_AS_REG 0x14
48#define DS2780_SFR_REG 0x15
49#define DS2780_FULL_MSB_REG 0x16
50#define DS2780_FULL_LSB_REG 0x17
51#define DS2780_AE_MSB_REG 0x18
52#define DS2780_AE_LSB_REG 0x19
53#define DS2780_SE_MSB_REG 0x1A
54#define DS2780_SE_LSB_REG 0x1B
55/* Register 0x1C - 0x1E Reserved */
56#define DS2780_EEPROM_REG 0x1F
57#define DS2780_EEPROM_BLOCK0_START 0x20
58/* Register 0x20 - 0x2F User EEPROM */
59#define DS2780_EEPROM_BLOCK0_END 0x2F
60/* Register 0x30 - 0x5F Reserved */
61#define DS2780_EEPROM_BLOCK1_START 0x60
62#define DS2780_CONTROL_REG 0x60
63#define DS2780_AB_REG 0x61
64#define DS2780_AC_MSB_REG 0x62
65#define DS2780_AC_LSB_REG 0x63
66#define DS2780_VCHG_REG 0x64
67#define DS2780_IMIN_REG 0x65
68#define DS2780_VAE_REG 0x66
69#define DS2780_IAE_REG 0x67
70#define DS2780_AE_40_REG 0x68
71#define DS2780_RSNSP_REG 0x69
72#define DS2780_FULL_40_MSB_REG 0x6A
73#define DS2780_FULL_40_LSB_REG 0x6B
74#define DS2780_FULL_3040_SLOPE_REG 0x6C
75#define DS2780_FULL_2030_SLOPE_REG 0x6D
76#define DS2780_FULL_1020_SLOPE_REG 0x6E
77#define DS2780_FULL_0010_SLOPE_REG 0x6F
78#define DS2780_AE_3040_SLOPE_REG 0x70
79#define DS2780_AE_2030_SLOPE_REG 0x71
80#define DS2780_AE_1020_SLOPE_REG 0x72
81#define DS2780_AE_0010_SLOPE_REG 0x73
82#define DS2780_SE_3040_SLOPE_REG 0x74
83#define DS2780_SE_2030_SLOPE_REG 0x75
84#define DS2780_SE_1020_SLOPE_REG 0x76
85#define DS2780_SE_0010_SLOPE_REG 0x77
86#define DS2780_RSGAIN_MSB_REG 0x78
87#define DS2780_RSGAIN_LSB_REG 0x79
88#define DS2780_RSTC_REG 0x7A
89#define DS2780_FRSGAIN_MSB_REG 0x7B
90#define DS2780_FRSGAIN_LSB_REG 0x7C
91#define DS2780_EEPROM_BLOCK1_END 0x7C
92/* Register 0x7D - 0xFF Reserved */
93
94/* Number of valid register addresses */
95#define DS2780_DATA_SIZE 0x80
96
97/* Status register bits */
98#define DS2780_STATUS_REG_CHGTF (1 << 7)
99#define DS2780_STATUS_REG_AEF (1 << 6)
100#define DS2780_STATUS_REG_SEF (1 << 5)
101#define DS2780_STATUS_REG_LEARNF (1 << 4)
102/* Bit 3 Reserved */
103#define DS2780_STATUS_REG_UVF (1 << 2)
104#define DS2780_STATUS_REG_PORF (1 << 1)
105/* Bit 0 Reserved */
106
107/* Control register bits */
108/* Bit 7 Reserved */
109#define DS2780_CONTROL_REG_UVEN (1 << 6)
110#define DS2780_CONTROL_REG_PMOD (1 << 5)
111#define DS2780_CONTROL_REG_RNAOP (1 << 4)
112/* Bit 0 - 3 Reserved */
113
114/* Special feature register bits */
115/* Bit 1 - 7 Reserved */
116#define DS2780_SFR_REG_PIOSC (1 << 0)
117
118/* EEPROM register bits */
119#define DS2780_EEPROM_REG_EEC (1 << 7)
120#define DS2780_EEPROM_REG_LOCK (1 << 6)
121/* Bit 2 - 6 Reserved */
122#define DS2780_EEPROM_REG_BL1 (1 << 1)
123#define DS2780_EEPROM_REG_BL0 (1 << 0)
124
125extern int w1_ds2780_io(struct device *dev, char *buf, int addr, size_t count,
126 int io);
127extern int w1_ds2780_eeprom_cmd(struct device *dev, int addr, int cmd);
128
129#endif /* !_W1_DS2780_H */
diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h
index 75137590c3bc..97479ae70b9c 100644
--- a/drivers/w1/w1_family.h
+++ b/drivers/w1/w1_family.h
@@ -37,6 +37,7 @@
37#define W1_FAMILY_DS2408 0x29 37#define W1_FAMILY_DS2408 0x29
38#define W1_EEPROM_DS2431 0x2D 38#define W1_EEPROM_DS2431 0x2D
39#define W1_FAMILY_DS2760 0x30 39#define W1_FAMILY_DS2760 0x30
40#define W1_FAMILY_DS2780 0x32
40 41
41#define MAXNAMELEN 32 42#define MAXNAMELEN 32
42 43
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-06 17:22:31 -0500