staging: msm/lcdc.c: Convert IS_ERR result to PTR_ERR
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / power / intel_mid_battery.c
blobbce3a01da2f0f33137e5901c066cc0f3f2a0f48b
1 /*
2 * intel_mid_battery.c - Intel MID PMIC Battery Driver
4 * Copyright (C) 2009 Intel Corporation
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
22 * Author: Nithish Mahalingam <nithish.mahalingam@intel.com>
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/err.h>
28 #include <linux/interrupt.h>
29 #include <linux/workqueue.h>
30 #include <linux/jiffies.h>
31 #include <linux/param.h>
32 #include <linux/device.h>
33 #include <linux/spi/spi.h>
34 #include <linux/platform_device.h>
35 #include <linux/power_supply.h>
37 #include <asm/intel_scu_ipc.h>
39 #define DRIVER_NAME "pmic_battery"
41 /*********************************************************************
42 * Generic defines
43 *********************************************************************/
45 static int debug;
46 module_param(debug, int, 0444);
47 MODULE_PARM_DESC(debug, "Flag to enable PMIC Battery debug messages.");
49 #define PMIC_BATT_DRV_INFO_UPDATED 1
50 #define PMIC_BATT_PRESENT 1
51 #define PMIC_BATT_NOT_PRESENT 0
52 #define PMIC_USB_PRESENT PMIC_BATT_PRESENT
53 #define PMIC_USB_NOT_PRESENT PMIC_BATT_NOT_PRESENT
55 /* pmic battery register related */
56 #define PMIC_BATT_CHR_SCHRGINT_ADDR 0xD2
57 #define PMIC_BATT_CHR_SBATOVP_MASK (1 << 1)
58 #define PMIC_BATT_CHR_STEMP_MASK (1 << 2)
59 #define PMIC_BATT_CHR_SCOMP_MASK (1 << 3)
60 #define PMIC_BATT_CHR_SUSBDET_MASK (1 << 4)
61 #define PMIC_BATT_CHR_SBATDET_MASK (1 << 5)
62 #define PMIC_BATT_CHR_SDCLMT_MASK (1 << 6)
63 #define PMIC_BATT_CHR_SUSBOVP_MASK (1 << 7)
64 #define PMIC_BATT_CHR_EXCPT_MASK 0xC6
65 #define PMIC_BATT_ADC_ACCCHRG_MASK (1 << 31)
66 #define PMIC_BATT_ADC_ACCCHRGVAL_MASK 0x7FFFFFFF
68 /* pmic ipc related */
69 #define PMIC_BATT_CHR_IPC_FCHRG_SUBID 0x4
70 #define PMIC_BATT_CHR_IPC_TCHRG_SUBID 0x6
72 /* types of battery charging */
73 enum batt_charge_type {
74 BATT_USBOTG_500MA_CHARGE,
75 BATT_USBOTG_TRICKLE_CHARGE,
78 /* valid battery events */
79 enum batt_event {
80 BATT_EVENT_BATOVP_EXCPT,
81 BATT_EVENT_USBOVP_EXCPT,
82 BATT_EVENT_TEMP_EXCPT,
83 BATT_EVENT_DCLMT_EXCPT,
84 BATT_EVENT_EXCPT
88 /*********************************************************************
89 * Battery properties
90 *********************************************************************/
93 * pmic battery info
95 struct pmic_power_module_info {
96 bool is_dev_info_updated;
97 struct device *dev;
98 /* pmic battery data */
99 unsigned long update_time; /* jiffies when data read */
100 unsigned int usb_is_present;
101 unsigned int batt_is_present;
102 unsigned int batt_health;
103 unsigned int usb_health;
104 unsigned int batt_status;
105 unsigned int batt_charge_now; /* in mAS */
106 unsigned int batt_prev_charge_full; /* in mAS */
107 unsigned int batt_charge_rate; /* in units per second */
109 struct power_supply usb;
110 struct power_supply batt;
111 int irq; /* GPE_ID or IRQ# */
112 struct workqueue_struct *monitor_wqueue;
113 struct delayed_work monitor_battery;
114 struct work_struct handler;
117 static unsigned int delay_time = 2000; /* in ms */
120 * pmic ac properties
122 static enum power_supply_property pmic_usb_props[] = {
123 POWER_SUPPLY_PROP_PRESENT,
124 POWER_SUPPLY_PROP_HEALTH,
128 * pmic battery properties
130 static enum power_supply_property pmic_battery_props[] = {
131 POWER_SUPPLY_PROP_STATUS,
132 POWER_SUPPLY_PROP_HEALTH,
133 POWER_SUPPLY_PROP_PRESENT,
134 POWER_SUPPLY_PROP_CHARGE_NOW,
135 POWER_SUPPLY_PROP_CHARGE_FULL,
140 * Glue functions for talking to the IPC
143 struct battery_property {
144 u32 capacity; /* Charger capacity */
145 u8 crnt; /* Quick charge current value*/
146 u8 volt; /* Fine adjustment of constant charge voltage */
147 u8 prot; /* CHRGPROT register value */
148 u8 prot2; /* CHRGPROT1 register value */
149 u8 timer; /* Charging timer */
152 #define IPCMSG_BATTERY 0xEF
154 /* Battery coulomb counter accumulator commands */
155 #define IPC_CMD_CC_WR 0 /* Update coulomb counter value */
156 #define IPC_CMD_CC_RD 1 /* Read coulomb counter value */
157 #define IPC_CMD_BATTERY_PROPERTY 2 /* Read Battery property */
160 * pmic_scu_ipc_battery_cc_read - read battery cc
161 * @value: battery coulomb counter read
163 * Reads the battery couloumb counter value, returns 0 on success, or
164 * an error code
166 * This function may sleep. Locking for SCU accesses is handled for
167 * the caller.
169 static int pmic_scu_ipc_battery_cc_read(u32 *value)
171 return intel_scu_ipc_command(IPCMSG_BATTERY, IPC_CMD_CC_RD,
172 NULL, 0, value, 1);
176 * pmic_scu_ipc_battery_property_get - fetch properties
177 * @prop: battery properties
179 * Retrieve the battery properties from the power management
181 * This function may sleep. Locking for SCU accesses is handled for
182 * the caller.
184 static int pmic_scu_ipc_battery_property_get(struct battery_property *prop)
186 u32 data[3];
187 u8 *p = (u8 *)&data[1];
188 int err = intel_scu_ipc_command(IPCMSG_BATTERY,
189 IPC_CMD_BATTERY_PROPERTY, NULL, 0, data, 3);
191 prop->capacity = data[0];
192 prop->crnt = *p++;
193 prop->volt = *p++;
194 prop->prot = *p++;
195 prop->prot2 = *p++;
196 prop->timer = *p++;
198 return err;
202 * pmic_scu_ipc_set_charger - set charger
203 * @charger: charger to select
205 * Switch the charging mode for the SCU
208 static int pmic_scu_ipc_set_charger(int charger)
210 return intel_scu_ipc_simple_command(IPCMSG_BATTERY, charger);
214 * pmic_battery_log_event - log battery events
215 * @event: battery event to be logged
216 * Context: can sleep
218 * There are multiple battery events which may be of interest to users;
219 * this battery function logs the different battery events onto the
220 * kernel log messages.
222 static void pmic_battery_log_event(enum batt_event event)
224 printk(KERN_WARNING "pmic-battery: ");
225 switch (event) {
226 case BATT_EVENT_BATOVP_EXCPT:
227 printk(KERN_CONT "battery overvoltage condition\n");
228 break;
229 case BATT_EVENT_USBOVP_EXCPT:
230 printk(KERN_CONT "usb charger overvoltage condition\n");
231 break;
232 case BATT_EVENT_TEMP_EXCPT:
233 printk(KERN_CONT "high battery temperature condition\n");
234 break;
235 case BATT_EVENT_DCLMT_EXCPT:
236 printk(KERN_CONT "over battery charge current condition\n");
237 break;
238 default:
239 printk(KERN_CONT "charger/battery exception %d\n", event);
240 break;
245 * pmic_battery_read_status - read battery status information
246 * @pbi: device info structure to update the read information
247 * Context: can sleep
249 * PMIC power source information need to be updated based on the data read
250 * from the PMIC battery registers.
253 static void pmic_battery_read_status(struct pmic_power_module_info *pbi)
255 unsigned int update_time_intrvl;
256 unsigned int chrg_val;
257 u32 ccval;
258 u8 r8;
259 struct battery_property batt_prop;
260 int batt_present = 0;
261 int usb_present = 0;
262 int batt_exception = 0;
264 /* make sure the last batt_status read happened delay_time before */
265 if (pbi->update_time && time_before(jiffies, pbi->update_time +
266 msecs_to_jiffies(delay_time)))
267 return;
269 update_time_intrvl = jiffies_to_msecs(jiffies - pbi->update_time);
270 pbi->update_time = jiffies;
272 /* read coulomb counter registers and schrgint register */
273 if (pmic_scu_ipc_battery_cc_read(&ccval)) {
274 dev_warn(pbi->dev, "%s(): ipc config cmd failed\n",
275 __func__);
276 return;
279 if (intel_scu_ipc_ioread8(PMIC_BATT_CHR_SCHRGINT_ADDR, &r8)) {
280 dev_warn(pbi->dev, "%s(): ipc pmic read failed\n",
281 __func__);
282 return;
286 * set pmic_power_module_info members based on pmic register values
287 * read.
290 /* set batt_is_present */
291 if (r8 & PMIC_BATT_CHR_SBATDET_MASK) {
292 pbi->batt_is_present = PMIC_BATT_PRESENT;
293 batt_present = 1;
294 } else {
295 pbi->batt_is_present = PMIC_BATT_NOT_PRESENT;
296 pbi->batt_health = POWER_SUPPLY_HEALTH_UNKNOWN;
297 pbi->batt_status = POWER_SUPPLY_STATUS_UNKNOWN;
300 /* set batt_health */
301 if (batt_present) {
302 if (r8 & PMIC_BATT_CHR_SBATOVP_MASK) {
303 pbi->batt_health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
304 pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
305 pmic_battery_log_event(BATT_EVENT_BATOVP_EXCPT);
306 batt_exception = 1;
307 } else if (r8 & PMIC_BATT_CHR_SDCLMT_MASK) {
308 pbi->batt_health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
309 pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
310 pmic_battery_log_event(BATT_EVENT_DCLMT_EXCPT);
311 batt_exception = 1;
312 } else if (r8 & PMIC_BATT_CHR_STEMP_MASK) {
313 pbi->batt_health = POWER_SUPPLY_HEALTH_OVERHEAT;
314 pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
315 pmic_battery_log_event(BATT_EVENT_TEMP_EXCPT);
316 batt_exception = 1;
317 } else {
318 pbi->batt_health = POWER_SUPPLY_HEALTH_GOOD;
322 /* set usb_is_present */
323 if (r8 & PMIC_BATT_CHR_SUSBDET_MASK) {
324 pbi->usb_is_present = PMIC_USB_PRESENT;
325 usb_present = 1;
326 } else {
327 pbi->usb_is_present = PMIC_USB_NOT_PRESENT;
328 pbi->usb_health = POWER_SUPPLY_HEALTH_UNKNOWN;
331 if (usb_present) {
332 if (r8 & PMIC_BATT_CHR_SUSBOVP_MASK) {
333 pbi->usb_health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
334 pmic_battery_log_event(BATT_EVENT_USBOVP_EXCPT);
335 } else {
336 pbi->usb_health = POWER_SUPPLY_HEALTH_GOOD;
340 chrg_val = ccval & PMIC_BATT_ADC_ACCCHRGVAL_MASK;
342 /* set batt_prev_charge_full to battery capacity the first time */
343 if (!pbi->is_dev_info_updated) {
344 if (pmic_scu_ipc_battery_property_get(&batt_prop)) {
345 dev_warn(pbi->dev, "%s(): ipc config cmd failed\n",
346 __func__);
347 return;
349 pbi->batt_prev_charge_full = batt_prop.capacity;
352 /* set batt_status */
353 if (batt_present && !batt_exception) {
354 if (r8 & PMIC_BATT_CHR_SCOMP_MASK) {
355 pbi->batt_status = POWER_SUPPLY_STATUS_FULL;
356 pbi->batt_prev_charge_full = chrg_val;
357 } else if (ccval & PMIC_BATT_ADC_ACCCHRG_MASK) {
358 pbi->batt_status = POWER_SUPPLY_STATUS_DISCHARGING;
359 } else {
360 pbi->batt_status = POWER_SUPPLY_STATUS_CHARGING;
364 /* set batt_charge_rate */
365 if (pbi->is_dev_info_updated && batt_present && !batt_exception) {
366 if (pbi->batt_status == POWER_SUPPLY_STATUS_DISCHARGING) {
367 if (pbi->batt_charge_now - chrg_val) {
368 pbi->batt_charge_rate = ((pbi->batt_charge_now -
369 chrg_val) * 1000 * 60) /
370 update_time_intrvl;
372 } else if (pbi->batt_status == POWER_SUPPLY_STATUS_CHARGING) {
373 if (chrg_val - pbi->batt_charge_now) {
374 pbi->batt_charge_rate = ((chrg_val -
375 pbi->batt_charge_now) * 1000 * 60) /
376 update_time_intrvl;
378 } else
379 pbi->batt_charge_rate = 0;
380 } else {
381 pbi->batt_charge_rate = -1;
384 /* batt_charge_now */
385 if (batt_present && !batt_exception)
386 pbi->batt_charge_now = chrg_val;
387 else
388 pbi->batt_charge_now = -1;
390 pbi->is_dev_info_updated = PMIC_BATT_DRV_INFO_UPDATED;
394 * pmic_usb_get_property - usb power source get property
395 * @psy: usb power supply context
396 * @psp: usb power source property
397 * @val: usb power source property value
398 * Context: can sleep
400 * PMIC usb power source property needs to be provided to power_supply
401 * subsytem for it to provide the information to users.
403 static int pmic_usb_get_property(struct power_supply *psy,
404 enum power_supply_property psp,
405 union power_supply_propval *val)
407 struct pmic_power_module_info *pbi = container_of(psy,
408 struct pmic_power_module_info, usb);
410 /* update pmic_power_module_info members */
411 pmic_battery_read_status(pbi);
413 switch (psp) {
414 case POWER_SUPPLY_PROP_PRESENT:
415 val->intval = pbi->usb_is_present;
416 break;
417 case POWER_SUPPLY_PROP_HEALTH:
418 val->intval = pbi->usb_health;
419 break;
420 default:
421 return -EINVAL;
424 return 0;
427 static inline unsigned long mAStouAh(unsigned long v)
429 /* seconds to hours, mA to µA */
430 return (v * 1000) / 3600;
434 * pmic_battery_get_property - battery power source get property
435 * @psy: battery power supply context
436 * @psp: battery power source property
437 * @val: battery power source property value
438 * Context: can sleep
440 * PMIC battery power source property needs to be provided to power_supply
441 * subsytem for it to provide the information to users.
443 static int pmic_battery_get_property(struct power_supply *psy,
444 enum power_supply_property psp,
445 union power_supply_propval *val)
447 struct pmic_power_module_info *pbi = container_of(psy,
448 struct pmic_power_module_info, batt);
450 /* update pmic_power_module_info members */
451 pmic_battery_read_status(pbi);
453 switch (psp) {
454 case POWER_SUPPLY_PROP_STATUS:
455 val->intval = pbi->batt_status;
456 break;
457 case POWER_SUPPLY_PROP_HEALTH:
458 val->intval = pbi->batt_health;
459 break;
460 case POWER_SUPPLY_PROP_PRESENT:
461 val->intval = pbi->batt_is_present;
462 break;
463 case POWER_SUPPLY_PROP_CHARGE_NOW:
464 val->intval = mAStouAh(pbi->batt_charge_now);
465 break;
466 case POWER_SUPPLY_PROP_CHARGE_FULL:
467 val->intval = mAStouAh(pbi->batt_prev_charge_full);
468 break;
469 default:
470 return -EINVAL;
473 return 0;
477 * pmic_battery_monitor - monitor battery status
478 * @work: work structure
479 * Context: can sleep
481 * PMIC battery status needs to be monitored for any change
482 * and information needs to be frequently updated.
484 static void pmic_battery_monitor(struct work_struct *work)
486 struct pmic_power_module_info *pbi = container_of(work,
487 struct pmic_power_module_info, monitor_battery.work);
489 /* update pmic_power_module_info members */
490 pmic_battery_read_status(pbi);
491 queue_delayed_work(pbi->monitor_wqueue, &pbi->monitor_battery, HZ * 10);
495 * pmic_battery_set_charger - set battery charger
496 * @pbi: device info structure
497 * @chrg: charge mode to set battery charger in
498 * Context: can sleep
500 * PMIC battery charger needs to be enabled based on the usb charge
501 * capabilities connected to the platform.
503 static int pmic_battery_set_charger(struct pmic_power_module_info *pbi,
504 enum batt_charge_type chrg)
506 int retval;
508 /* set usblmt bits and chrgcntl register bits appropriately */
509 switch (chrg) {
510 case BATT_USBOTG_500MA_CHARGE:
511 retval = pmic_scu_ipc_set_charger(PMIC_BATT_CHR_IPC_FCHRG_SUBID);
512 break;
513 case BATT_USBOTG_TRICKLE_CHARGE:
514 retval = pmic_scu_ipc_set_charger(PMIC_BATT_CHR_IPC_TCHRG_SUBID);
515 break;
516 default:
517 dev_warn(pbi->dev, "%s(): out of range usb charger "
518 "charge detected\n", __func__);
519 return -EINVAL;
522 if (retval) {
523 dev_warn(pbi->dev, "%s(): ipc pmic read failed\n",
524 __func__);
525 return retval;;
528 return 0;
532 * pmic_battery_interrupt_handler - pmic battery interrupt handler
533 * Context: interrupt context
535 * PMIC battery interrupt handler which will be called with either
536 * battery full condition occurs or usb otg & battery connect
537 * condition occurs.
539 static irqreturn_t pmic_battery_interrupt_handler(int id, void *dev)
541 struct pmic_power_module_info *pbi = dev;
543 schedule_work(&pbi->handler);
545 return IRQ_HANDLED;
549 * pmic_battery_handle_intrpt - pmic battery service interrupt
550 * @work: work structure
551 * Context: can sleep
553 * PMIC battery needs to either update the battery status as full
554 * if it detects battery full condition caused the interrupt or needs
555 * to enable battery charger if it detects usb and battery detect
556 * caused the source of interrupt.
558 static void pmic_battery_handle_intrpt(struct work_struct *work)
560 struct pmic_power_module_info *pbi = container_of(work,
561 struct pmic_power_module_info, handler);
562 enum batt_charge_type chrg;
563 u8 r8;
565 if (intel_scu_ipc_ioread8(PMIC_BATT_CHR_SCHRGINT_ADDR, &r8)) {
566 dev_warn(pbi->dev, "%s(): ipc pmic read failed\n",
567 __func__);
568 return;
570 /* find the cause of the interrupt */
571 if (r8 & PMIC_BATT_CHR_SBATDET_MASK) {
572 pbi->batt_is_present = PMIC_BATT_PRESENT;
573 } else {
574 pbi->batt_is_present = PMIC_BATT_NOT_PRESENT;
575 pbi->batt_health = POWER_SUPPLY_HEALTH_UNKNOWN;
576 pbi->batt_status = POWER_SUPPLY_STATUS_UNKNOWN;
577 return;
580 if (r8 & PMIC_BATT_CHR_EXCPT_MASK) {
581 pbi->batt_health = POWER_SUPPLY_HEALTH_UNKNOWN;
582 pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
583 pbi->usb_health = POWER_SUPPLY_HEALTH_UNKNOWN;
584 pmic_battery_log_event(BATT_EVENT_EXCPT);
585 return;
586 } else {
587 pbi->batt_health = POWER_SUPPLY_HEALTH_GOOD;
588 pbi->usb_health = POWER_SUPPLY_HEALTH_GOOD;
591 if (r8 & PMIC_BATT_CHR_SCOMP_MASK) {
592 u32 ccval;
593 pbi->batt_status = POWER_SUPPLY_STATUS_FULL;
595 if (pmic_scu_ipc_battery_cc_read(&ccval)) {
596 dev_warn(pbi->dev, "%s(): ipc config cmd "
597 "failed\n", __func__);
598 return;
600 pbi->batt_prev_charge_full = ccval &
601 PMIC_BATT_ADC_ACCCHRGVAL_MASK;
602 return;
605 if (r8 & PMIC_BATT_CHR_SUSBDET_MASK) {
606 pbi->usb_is_present = PMIC_USB_PRESENT;
607 } else {
608 pbi->usb_is_present = PMIC_USB_NOT_PRESENT;
609 pbi->usb_health = POWER_SUPPLY_HEALTH_UNKNOWN;
610 return;
613 /* setup battery charging */
615 #if 0
616 /* check usb otg power capability and set charger accordingly */
617 retval = langwell_udc_maxpower(&power);
618 if (retval) {
619 dev_warn(pbi->dev,
620 "%s(): usb otg power query failed with error code %d\n",
621 __func__, retval);
622 return;
625 if (power >= 500)
626 chrg = BATT_USBOTG_500MA_CHARGE;
627 else
628 #endif
629 chrg = BATT_USBOTG_TRICKLE_CHARGE;
631 /* enable battery charging */
632 if (pmic_battery_set_charger(pbi, chrg)) {
633 dev_warn(pbi->dev,
634 "%s(): failed to set up battery charging\n", __func__);
635 return;
638 dev_dbg(pbi->dev,
639 "pmic-battery: %s() - setting up battery charger successful\n",
640 __func__);
644 * pmic_battery_probe - pmic battery initialize
645 * @irq: pmic battery device irq
646 * @dev: pmic battery device structure
647 * Context: can sleep
649 * PMIC battery initializes its internal data structue and other
650 * infrastructure components for it to work as expected.
652 static __devinit int probe(int irq, struct device *dev)
654 int retval = 0;
655 struct pmic_power_module_info *pbi;
657 dev_dbg(dev, "pmic-battery: found pmic battery device\n");
659 pbi = kzalloc(sizeof(*pbi), GFP_KERNEL);
660 if (!pbi) {
661 dev_err(dev, "%s(): memory allocation failed\n",
662 __func__);
663 return -ENOMEM;
666 pbi->dev = dev;
667 pbi->irq = irq;
668 dev_set_drvdata(dev, pbi);
670 /* initialize all required framework before enabling interrupts */
671 INIT_WORK(&pbi->handler, pmic_battery_handle_intrpt);
672 INIT_DELAYED_WORK(&pbi->monitor_battery, pmic_battery_monitor);
673 pbi->monitor_wqueue =
674 create_singlethread_workqueue(dev_name(dev));
675 if (!pbi->monitor_wqueue) {
676 dev_err(dev, "%s(): wqueue init failed\n", __func__);
677 retval = -ESRCH;
678 goto wqueue_failed;
681 /* register interrupt */
682 retval = request_irq(pbi->irq, pmic_battery_interrupt_handler,
683 0, DRIVER_NAME, pbi);
684 if (retval) {
685 dev_err(dev, "%s(): cannot get IRQ\n", __func__);
686 goto requestirq_failed;
689 /* register pmic-batt with power supply subsystem */
690 pbi->batt.name = "pmic-batt";
691 pbi->batt.type = POWER_SUPPLY_TYPE_BATTERY;
692 pbi->batt.properties = pmic_battery_props;
693 pbi->batt.num_properties = ARRAY_SIZE(pmic_battery_props);
694 pbi->batt.get_property = pmic_battery_get_property;
695 retval = power_supply_register(dev, &pbi->batt);
696 if (retval) {
697 dev_err(dev,
698 "%s(): failed to register pmic battery device with power supply subsystem\n",
699 __func__);
700 goto power_reg_failed;
703 dev_dbg(dev, "pmic-battery: %s() - pmic battery device "
704 "registration with power supply subsystem successful\n",
705 __func__);
707 queue_delayed_work(pbi->monitor_wqueue, &pbi->monitor_battery, HZ * 1);
709 /* register pmic-usb with power supply subsystem */
710 pbi->usb.name = "pmic-usb";
711 pbi->usb.type = POWER_SUPPLY_TYPE_USB;
712 pbi->usb.properties = pmic_usb_props;
713 pbi->usb.num_properties = ARRAY_SIZE(pmic_usb_props);
714 pbi->usb.get_property = pmic_usb_get_property;
715 retval = power_supply_register(dev, &pbi->usb);
716 if (retval) {
717 dev_err(dev,
718 "%s(): failed to register pmic usb device with power supply subsystem\n",
719 __func__);
720 goto power_reg_failed_1;
723 if (debug)
724 printk(KERN_INFO "pmic-battery: %s() - pmic usb device "
725 "registration with power supply subsystem successful\n",
726 __func__);
728 return retval;
730 power_reg_failed_1:
731 power_supply_unregister(&pbi->batt);
732 power_reg_failed:
733 cancel_delayed_work_sync(&pbi->monitor_battery);
734 requestirq_failed:
735 destroy_workqueue(pbi->monitor_wqueue);
736 wqueue_failed:
737 kfree(pbi);
739 return retval;
742 static int __devinit platform_pmic_battery_probe(struct platform_device *pdev)
744 return probe(pdev->id, &pdev->dev);
748 * pmic_battery_remove - pmic battery finalize
749 * @dev: pmic battery device structure
750 * Context: can sleep
752 * PMIC battery finalizes its internal data structue and other
753 * infrastructure components that it initialized in
754 * pmic_battery_probe.
757 static int __devexit platform_pmic_battery_remove(struct platform_device *pdev)
759 struct pmic_power_module_info *pbi = dev_get_drvdata(&pdev->dev);
761 free_irq(pbi->irq, pbi);
762 cancel_delayed_work_sync(&pbi->monitor_battery);
763 destroy_workqueue(pbi->monitor_wqueue);
765 power_supply_unregister(&pbi->usb);
766 power_supply_unregister(&pbi->batt);
768 cancel_work_sync(&pbi->handler);
769 kfree(pbi);
770 return 0;
773 static struct platform_driver platform_pmic_battery_driver = {
774 .driver = {
775 .name = DRIVER_NAME,
776 .owner = THIS_MODULE,
778 .probe = platform_pmic_battery_probe,
779 .remove = __devexit_p(platform_pmic_battery_remove),
782 static int __init platform_pmic_battery_module_init(void)
784 return platform_driver_register(&platform_pmic_battery_driver);
787 static void __exit platform_pmic_battery_module_exit(void)
789 platform_driver_unregister(&platform_pmic_battery_driver);
792 module_init(platform_pmic_battery_module_init);
793 module_exit(platform_pmic_battery_module_exit);
795 MODULE_AUTHOR("Nithish Mahalingam <nithish.mahalingam@intel.com>");
796 MODULE_DESCRIPTION("Intel Moorestown PMIC Battery Driver");
797 MODULE_LICENSE("GPL");