2 * PMU driver for Wolfson Microelectronics wm831x PMICs
4 * Copyright 2009 Wolfson Microelectronics PLC.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/module.h>
12 #include <linux/err.h>
13 #include <linux/platform_device.h>
14 #include <linux/power_supply.h>
15 #include <linux/slab.h>
17 #include <linux/mfd/wm831x/core.h>
18 #include <linux/mfd/wm831x/auxadc.h>
19 #include <linux/mfd/wm831x/pmu.h>
20 #include <linux/mfd/wm831x/pdata.h>
21 #include <linux/mfd/wm831x/irq.h>
27 #define WM_BATT_DBG(x...) printk(KERN_INFO x)
29 #define WM_BATT_DBG(x...) do {} while (0)
32 #define WM831X_CHG_SYSLO_SHIFT 4
33 #define WM831X_CHG_SYSOK_SHIFT 0
34 #define WM831X_CHG_SYSLO_MASK ~(0x7 << 4)
35 #define WM831X_CHG_SYSOK_MASK ~(0x7 << 0)
39 static int batt_step_table[batt_num] = {
40 3400,3420,3440,3475,3505,3525,
41 3540,3557,3570,3580,3610,
42 3630,3640,3652,3662,3672,
43 3680,3687,3693,3699,3705,
44 3710,3714,3718,3722,3726,
45 3730,3734,3738,3742,3746,
46 3750,3756,3764,3774,3786,
47 3800,3808,3817,3827,3838,
48 3950,3964,3982,4002,4026,
49 4050,4074,4098,4123,4149,4178
52 static int batt_disp_table[batt_num] = {
65 static int batt_chg_step_table[batt_num] = {
66 3530,3565,3600,3635,3655,3680,//+160
67 3700,3717,3734,3745,3755,//+150
68 3770,3778,3786,3795,3803,//+140
69 3810,3814,3818,3822,3825,//+130
70 3830,3832,3834,3836,3837,//+120
71 3840,3842,3844,3846,3847,//+110
72 3850,3857,3864,3871,3876,//+100
73 3890,3897,3904,3911,3918,//+90
74 4030,4047,4064,4080,4096,//+80
75 4120,4132,4144,4156,4170,4180//+70
80 #define TIMER_MS_COUNTS 1000
81 struct wm_batt_priv_data {
91 struct wm831x *wm831x;
92 struct power_supply wall;
93 struct power_supply usb;
94 struct power_supply battery;
95 struct work_struct batt_work;
96 struct timer_list timer;
97 struct wm_batt_priv_data batt_info;
98 struct wake_lock syslo_wake;
102 struct wm831x_power *g_wm831x_power;
104 static int power_test_sysfs_init(void);
105 extern void wm831x_batt_vol_level(struct wm831x_power *power, int batt_vol, int *level);
106 static DEFINE_MUTEX(charging_mutex);
108 int wm831x_read_on_pin_status(void)
114 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
118 ret = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_ON_PIN_CONTROL);
122 return !(ret & WM831X_ON_PIN_STS) ? 1 : 0;
125 static int wm831x_power_check_online(struct wm831x *wm831x, int supply,
126 union power_supply_propval *val)
130 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
142 int wm831x_read_chg_status(void)
144 int ret, usb_chg = 0, wall_chg = 0;
148 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
152 ret = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_SYSTEM_STATUS);
156 if (ret & WM831X_PWR_USB)
158 if (ret & WM831X_PWR_WALL)
161 return ((usb_chg | wall_chg) ? 1 : 0);
164 static int wm831x_power_read_voltage(struct wm831x *wm831x,
165 enum wm831x_auxadc src,
166 union power_supply_propval *val)
169 ret = wm831x_auxadc_read_uv(wm831x, src);
176 int wm831x_read_batt_voltage(void)
182 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
186 ret = wm831x_auxadc_read_uv(g_wm831x_power->wm831x, WM831X_AUX_BATT);
189 //EXPORT_SYMBOL_GPL(wm831x_get_batt_voltage);
191 /*********************************************************************
193 *********************************************************************/
194 static int wm831x_wall_get_prop(struct power_supply *psy,
195 enum power_supply_property psp,
196 union power_supply_propval *val)
198 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
199 struct wm831x *wm831x = wm831x_power->wm831x;
203 case POWER_SUPPLY_PROP_ONLINE:
204 ret = wm831x_power_check_online(wm831x, WM831X_PWR_WALL, val);
206 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
207 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_WALL, val);
217 static enum power_supply_property wm831x_wall_props[] = {
218 POWER_SUPPLY_PROP_ONLINE,
219 POWER_SUPPLY_PROP_VOLTAGE_NOW,
222 /*********************************************************************
224 *********************************************************************/
225 static int wm831x_usb_get_prop(struct power_supply *psy,
226 enum power_supply_property psp,
227 union power_supply_propval *val)
229 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
230 struct wm831x *wm831x = wm831x_power->wm831x;
234 case POWER_SUPPLY_PROP_ONLINE:
235 ret = wm831x_power_check_online(wm831x, WM831X_PWR_USB, val);
237 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
238 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_USB, val);
248 static enum power_supply_property wm831x_usb_props[] = {
249 POWER_SUPPLY_PROP_ONLINE,
250 POWER_SUPPLY_PROP_VOLTAGE_NOW,
253 /*********************************************************************
255 *********************************************************************/
262 static struct chg_map trickle_ilims[] = {
263 { 50, 0 << WM831X_CHG_TRKL_ILIM_SHIFT },
264 { 100, 1 << WM831X_CHG_TRKL_ILIM_SHIFT },
265 { 150, 2 << WM831X_CHG_TRKL_ILIM_SHIFT },
266 { 200, 3 << WM831X_CHG_TRKL_ILIM_SHIFT },
269 static struct chg_map vsels[] = {
270 { 4050, 0 << WM831X_CHG_VSEL_SHIFT },
271 { 4100, 1 << WM831X_CHG_VSEL_SHIFT },
272 { 4150, 2 << WM831X_CHG_VSEL_SHIFT },
273 { 4200, 3 << WM831X_CHG_VSEL_SHIFT },
276 static struct chg_map fast_ilims[] = {
277 { 0, 0 << WM831X_CHG_FAST_ILIM_SHIFT },
278 { 50, 1 << WM831X_CHG_FAST_ILIM_SHIFT },
279 { 100, 2 << WM831X_CHG_FAST_ILIM_SHIFT },
280 { 150, 3 << WM831X_CHG_FAST_ILIM_SHIFT },
281 { 200, 4 << WM831X_CHG_FAST_ILIM_SHIFT },
282 { 250, 5 << WM831X_CHG_FAST_ILIM_SHIFT },
283 { 300, 6 << WM831X_CHG_FAST_ILIM_SHIFT },
284 { 350, 7 << WM831X_CHG_FAST_ILIM_SHIFT },
285 { 400, 8 << WM831X_CHG_FAST_ILIM_SHIFT },
286 { 450, 9 << WM831X_CHG_FAST_ILIM_SHIFT },
287 { 500, 10 << WM831X_CHG_FAST_ILIM_SHIFT },
288 { 600, 11 << WM831X_CHG_FAST_ILIM_SHIFT },
289 { 700, 12 << WM831X_CHG_FAST_ILIM_SHIFT },
290 { 800, 13 << WM831X_CHG_FAST_ILIM_SHIFT },
291 { 900, 14 << WM831X_CHG_FAST_ILIM_SHIFT },
292 { 1000, 15 << WM831X_CHG_FAST_ILIM_SHIFT },
295 static struct chg_map eoc_iterms[] = {
296 { 20, 0 << WM831X_CHG_ITERM_SHIFT },
297 { 30, 1 << WM831X_CHG_ITERM_SHIFT },
298 { 40, 2 << WM831X_CHG_ITERM_SHIFT },
299 { 50, 3 << WM831X_CHG_ITERM_SHIFT },
300 { 60, 4 << WM831X_CHG_ITERM_SHIFT },
301 { 70, 5 << WM831X_CHG_ITERM_SHIFT },
302 { 80, 6 << WM831X_CHG_ITERM_SHIFT },
303 { 90, 7 << WM831X_CHG_ITERM_SHIFT },
306 static struct chg_map chg_times[] = {
307 { 60, 0 << WM831X_CHG_TIME_SHIFT },
308 { 90, 1 << WM831X_CHG_TIME_SHIFT },
309 { 120, 2 << WM831X_CHG_TIME_SHIFT },
310 { 150, 3 << WM831X_CHG_TIME_SHIFT },
311 { 180, 4 << WM831X_CHG_TIME_SHIFT },
312 { 210, 5 << WM831X_CHG_TIME_SHIFT },
313 { 240, 6 << WM831X_CHG_TIME_SHIFT },
314 { 270, 7 << WM831X_CHG_TIME_SHIFT },
315 { 300, 8 << WM831X_CHG_TIME_SHIFT },
316 { 330, 9 << WM831X_CHG_TIME_SHIFT },
317 { 360, 10 << WM831X_CHG_TIME_SHIFT },
318 { 390, 11 << WM831X_CHG_TIME_SHIFT },
319 { 420, 12 << WM831X_CHG_TIME_SHIFT },
320 { 450, 13 << WM831X_CHG_TIME_SHIFT },
321 { 480, 14 << WM831X_CHG_TIME_SHIFT },
322 { 510, 15 << WM831X_CHG_TIME_SHIFT },
325 static struct chg_map chg_syslos[] = {
326 { 2800, 0 << WM831X_CHG_SYSLO_SHIFT},
327 { 2900, 1 << WM831X_CHG_SYSLO_SHIFT},
328 { 3000, 2 << WM831X_CHG_SYSLO_SHIFT},
329 { 3100, 3 << WM831X_CHG_SYSLO_SHIFT},
330 { 3200, 4 << WM831X_CHG_SYSLO_SHIFT},
331 { 3300, 5 << WM831X_CHG_SYSLO_SHIFT},
332 { 3400, 6 << WM831X_CHG_SYSLO_SHIFT},
333 { 3500, 7 << WM831X_CHG_SYSLO_SHIFT},
336 static struct chg_map chg_sysoks[] = {
337 { 2800, 0 << WM831X_CHG_SYSOK_SHIFT},
338 { 2900, 1 << WM831X_CHG_SYSOK_SHIFT},
339 { 3000, 2 << WM831X_CHG_SYSOK_SHIFT},
340 { 3100, 3 << WM831X_CHG_SYSOK_SHIFT},
341 { 3200, 4 << WM831X_CHG_SYSOK_SHIFT},
342 { 3300, 5 << WM831X_CHG_SYSOK_SHIFT},
343 { 3400, 6 << WM831X_CHG_SYSOK_SHIFT},
344 { 3500, 7 << WM831X_CHG_SYSOK_SHIFT},
347 static void wm831x_battey_apply_config(struct wm831x *wm831x,
348 struct chg_map *map, int count, int val,
349 int *reg, const char *name,
353 for (i = 0; i < count; i++)
354 if (val == map[i].val)
357 dev_err(wm831x->dev, "Invalid %s %d%s\n",
360 *reg |= map[i].reg_val;
361 dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units);
365 static void wm831x_config_battery(struct wm831x *wm831x)
367 struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
368 struct wm831x_battery_pdata *pdata;
369 int ret, reg1, reg2, reg3;
371 if (!wm831x_pdata || !wm831x_pdata->battery) {
372 dev_warn(wm831x->dev,
373 "No battery charger configuration\n");
377 pdata = wm831x_pdata->battery;
383 if (!pdata->enable) {
384 dev_info(wm831x->dev, "Battery charger disabled\n");
388 reg1 |= WM831X_CHG_ENA;
390 reg2 |= WM831X_CHG_OFF_MSK;
391 if (pdata->fast_enable)
392 reg1 |= WM831X_CHG_FAST;
394 wm831x_battey_apply_config(wm831x, trickle_ilims,
395 ARRAY_SIZE(trickle_ilims),
396 pdata->trickle_ilim, ®2,
397 "trickle charge current limit", "mA");
399 wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels),
401 "target voltage", "mV");
403 wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims),
404 pdata->fast_ilim, ®2,
405 "fast charge current limit", "mA");
407 wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms),
408 pdata->eoc_iterm, ®1,
409 "end of charge current threshold", "mA");
411 wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times),
412 pdata->timeout, ®2,
413 "charger timeout", "min");
415 wm831x_battey_apply_config(wm831x, chg_syslos, ARRAY_SIZE(chg_syslos),
417 "syslo voltage", "mV");
419 wm831x_battey_apply_config(wm831x, chg_sysoks, ARRAY_SIZE(chg_sysoks),
421 "sysok voltage", "mV");
423 ret = wm831x_reg_unlock(wm831x);
425 dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
429 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1,
430 WM831X_CHG_ENA_MASK |
431 WM831X_CHG_FAST_MASK |
432 WM831X_CHG_ITERM_MASK,
435 dev_err(wm831x->dev, "Failed to set charger control 1: %d\n",
438 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2,
440 WM831X_CHG_TIME_MASK |
441 WM831X_CHG_FAST_ILIM_MASK |
442 WM831X_CHG_TRKL_ILIM_MASK |
443 WM831X_CHG_VSEL_MASK,
446 dev_err(wm831x->dev, "Failed to set charger control 2: %d\n",
450 ret = wm831x_set_bits(wm831x, WM831X_SYSVDD_CONTROL,
451 WM831X_CHG_SYSLO_MASK |
452 WM831X_CHG_SYSOK_MASK,
455 dev_err(wm831x->dev, "Failed to set sysvdd control reg: %d\n",ret);
458 wm831x_reg_lock(wm831x);
461 static int wm831x_bat_check_status(struct wm831x *wm831x, int *status)
465 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
469 if (ret & WM831X_PWR_SRC_BATT) {
470 *status = POWER_SUPPLY_STATUS_DISCHARGING;
474 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
479 switch (ret & WM831X_CHG_STATE_MASK) {
480 case WM831X_CHG_STATE_OFF:
481 *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
483 case WM831X_CHG_STATE_TRICKLE:
484 case WM831X_CHG_STATE_FAST:
485 *status = POWER_SUPPLY_STATUS_CHARGING;
489 *status = POWER_SUPPLY_STATUS_UNKNOWN;
495 int wm831x_read_bat_charging_status(void)
501 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
505 ret = wm831x_bat_check_status(g_wm831x_power->wm831x, &status);
508 if (status == POWER_SUPPLY_STATUS_CHARGING)
513 static int wm831x_bat_check_type(struct wm831x *wm831x, int *type)
516 #ifdef WM831X_DEBUG_0
517 ret = wm831x_reg_read(wm831x, WM831X_POWER_STATE);
520 WM_BATT_DBG("%s: wm831x power status %#x\n", __FUNCTION__, ret);
522 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
525 WM_BATT_DBG("%s: wm831x system status %#x\n", __FUNCTION__, ret);
527 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_1);
530 WM_BATT_DBG("%s: wm831x charger control1 %#x\n", __FUNCTION__, ret);
532 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_2);
535 WM_BATT_DBG("%s: wm831x charger control2 %#x\n", __FUNCTION__, ret);
537 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
540 WM_BATT_DBG("%s: wm831x charger status %#x\n\n", __FUNCTION__, ret);
543 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
547 switch (ret & WM831X_CHG_STATE_MASK) {
548 case WM831X_CHG_STATE_TRICKLE:
549 case WM831X_CHG_STATE_TRICKLE_OT:
550 *type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
552 case WM831X_CHG_STATE_FAST:
553 case WM831X_CHG_STATE_FAST_OT:
554 *type = POWER_SUPPLY_CHARGE_TYPE_FAST;
557 *type = POWER_SUPPLY_CHARGE_TYPE_NONE;
564 static int wm831x_bat_check_health(struct wm831x *wm831x, int *health)
568 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
572 if (ret & WM831X_BATT_HOT_STS) {
573 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
577 if (ret & WM831X_BATT_COLD_STS) {
578 *health = POWER_SUPPLY_HEALTH_COLD;
582 if (ret & WM831X_BATT_OV_STS) {
583 *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
587 switch (ret & WM831X_CHG_STATE_MASK) {
588 case WM831X_CHG_STATE_TRICKLE_OT:
589 case WM831X_CHG_STATE_FAST_OT:
590 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
592 case WM831X_CHG_STATE_DEFECTIVE:
593 *health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
596 *health = POWER_SUPPLY_HEALTH_GOOD;
603 static int wm831x_bat_get_prop(struct power_supply *psy,
604 enum power_supply_property psp,
605 union power_supply_propval *val)
607 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
608 struct wm831x *wm831x = wm831x_power->wm831x;
612 case POWER_SUPPLY_PROP_STATUS:
613 ret = wm831x_bat_check_status(wm831x, &val->intval);
614 //val->intval = wm831x_power->batt_info.status;
616 case POWER_SUPPLY_PROP_PRESENT:
617 case POWER_SUPPLY_PROP_ONLINE:
618 //ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT, val);
619 val->intval = wm831x_power->batt_info.online;
621 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
622 //ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val);
623 val->intval = wm831x_power->batt_info.voltage;//uV
625 case POWER_SUPPLY_PROP_HEALTH:
626 //ret = wm831x_bat_check_health(wm831x, &val->intval);
627 val->intval = wm831x_power->batt_info.health;
629 case POWER_SUPPLY_PROP_CHARGE_TYPE:
630 ret = wm831x_bat_check_type(wm831x, &val->intval);
632 case POWER_SUPPLY_PROP_CAPACITY:
633 //ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val);
634 //wm831x_batt_vol_level(wm831x_power, val->intval, &level);
635 //val->intval = level;
636 val->intval = wm831x_power->batt_info.level;
638 case POWER_SUPPLY_PROP_TEMP:
641 case POWER_SUPPLY_PROP_TECHNOLOGY:
642 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
652 static enum power_supply_property wm831x_bat_props[] = {
653 POWER_SUPPLY_PROP_STATUS,
654 POWER_SUPPLY_PROP_HEALTH,
655 POWER_SUPPLY_PROP_PRESENT,
656 POWER_SUPPLY_PROP_VOLTAGE_NOW,
657 POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
658 POWER_SUPPLY_PROP_TECHNOLOGY,
659 POWER_SUPPLY_PROP_TEMP,
660 POWER_SUPPLY_PROP_CHARGE_TYPE,
663 #ifdef CONFIG_WM831X_WITH_BATTERY
664 static const char *wm831x_bat_irqs[] = {
675 static irqreturn_t wm831x_bat_irq(int irq, void *data)
677 struct wm831x_power *wm831x_power = data;
678 struct wm831x *wm831x = wm831x_power->wm831x;
681 irq0 = wm831x->irq_base + WM831X_IRQ_CHG_BATT_HOT + 1;
682 dev_crit(wm831x->dev, "battery changed: i=%d\n", irq-irq0);
684 /* The battery charger is autonomous so we don't need to do
685 * anything except kick user space */
686 power_supply_changed(&wm831x_power->battery);
692 /*********************************************************************
694 *********************************************************************/
696 static irqreturn_t wm831x_syslo_irq(int irq, void *data)
698 struct wm831x_power *wm831x_power = data;
699 struct wm831x *wm831x = wm831x_power->wm831x;
701 /* Not much we can actually *do* but tell people for
702 * posterity, we're probably about to run out of power. */
703 dev_crit(wm831x->dev, "SYSVDD under voltage and wake lock 60s\n");
704 wake_lock_timeout(&wm831x_power->syslo_wake,60*HZ);//wait for android closing system
708 static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
710 struct wm831x_power *wm831x_power = data;
711 struct wm831x *wm831x = wm831x_power->wm831x;
713 dev_dbg(wm831x->dev, "Power source changed\n");
714 WM_BATT_DBG("%s:Power source changed\n", __FUNCTION__);
715 /* Just notify for everything - little harm in overnotifying. */
716 power_supply_changed(&wm831x_power->battery);
717 power_supply_changed(&wm831x_power->usb);
718 power_supply_changed(&wm831x_power->wall);
724 static void wm831x_batt_timer_handler(unsigned long data)
726 struct wm831x_power *wm831x_power = (struct wm831x_power*)data;
727 schedule_work(&wm831x_power->batt_work);
728 mod_timer(&wm831x_power->timer, jiffies + msecs_to_jiffies(wm831x_power->interval));
731 void wm831x_batt_vol_level(struct wm831x_power *wm831x_power, int batt_vol, int *level)
734 static int chg_plus = 1000;
735 static int chg_minus = 1000;
736 static int chg_curr = 0;
737 static int chg_num = 60;
738 static int disp_plus = 1000;
739 static int disp_minus = 1000;
740 static int disp_curr = 0;
741 static int disp_num = 50;
744 *level = wm831x_power->batt_info.level;
745 ret = wm831x_bat_check_status(wm831x_power->wm831x, &status);
747 printk("%s: check bat status failer...err = %d\n", __FUNCTION__, ret);
751 if (status == POWER_SUPPLY_STATUS_NOT_CHARGING
752 && batt_vol >= batt_step_table[batt_num-1]) {
757 if (status == POWER_SUPPLY_STATUS_CHARGING)
763 for(i = 0; i < batt_num; i++){
764 if((batt_chg_step_table[i] <= batt_vol) &&
765 (batt_chg_step_table[i+1] > batt_vol))
768 *level = batt_disp_table[i];
770 if (batt_vol <= batt_chg_step_table[0])
772 if (batt_vol >= batt_chg_step_table[batt_num - 1])
776 if ((chg_plus == 1000) && (chg_minus == 1000))
786 if (*level >= (wm831x_power->batt_info.level+1))
791 if (++chg_plus > chg_num)
793 *level = wm831x_power->batt_info.level + 1;
804 *level = wm831x_power->batt_info.level;
808 else if (*level >= wm831x_power->batt_info.level)
813 if (++chg_curr > chg_num)
820 *level = wm831x_power->batt_info.level;
823 else if (*level < (wm831x_power->batt_info.level-1))
828 if (++chg_minus > (chg_num<<1))
830 *level = wm831x_power->batt_info.level - 1;
841 *level = wm831x_power->batt_info.level;
849 *level = wm831x_power->batt_info.level;
865 for(i = 0; i < batt_num; i++){
866 if(batt_vol >= batt_step_table[i] &&
867 batt_vol < batt_step_table[i+1])
870 *level = batt_disp_table[i];
872 if (batt_vol <= batt_step_table[0])
874 if (batt_vol >= batt_step_table[batt_num - 1])
878 if ((disp_plus == 1000) && (disp_minus == 1000))
888 if (*level <= (wm831x_power->batt_info.level-1))
893 if (++disp_minus > disp_num)
895 *level = wm831x_power->batt_info.level - 1;
898 if((*level < 17) || (*level > 85))
906 *level = wm831x_power->batt_info.level;
909 else if (*level <= wm831x_power->batt_info.level)
914 if (++disp_curr > disp_num)
921 *level = wm831x_power->batt_info.level;
924 else if (*level >= (wm831x_power->batt_info.level+1))
929 if (++disp_plus > (disp_num<<1))
931 *level = wm831x_power->batt_info.level + 1;
933 if((*level < 17) || (*level > 85))
940 *level = wm831x_power->batt_info.level;
948 *level = wm831x_power->batt_info.level;
959 static void wm831x_batt_work(struct work_struct *work)
961 int online, status,health,level, ret;
962 union power_supply_propval val;
963 struct wm831x_power *power = container_of(work, struct wm831x_power, batt_work);
965 ret = wm831x_power_check_online(power->wm831x, WM831X_PWR_SRC_BATT, &val);
967 printk("%s: check bat online failer... err = %d\n", __FUNCTION__, ret);
972 ret = wm831x_bat_check_status(power->wm831x, &status);
974 printk("%s: check bat status failer... err = %d\n", __FUNCTION__, ret);
978 ret = wm831x_bat_check_health(power->wm831x, &health);
980 printk("%s: check bat health failer... err = %d\n", __FUNCTION__, ret);
984 ret = wm831x_power_read_voltage(power->wm831x, WM831X_AUX_BATT, &val);
986 printk("%s: read bat voltage failer...err = %d\n", __FUNCTION__, ret);
989 power->batt_info.voltage = val.intval;
991 wm831x_batt_vol_level(power, val.intval / 1000, &level);
992 //mod_timer(&power->timer, jiffies + msecs_to_jiffies(power->interval));
994 if (online != power->batt_info.online || status != power->batt_info.status
995 || health != power->batt_info.health || level != power->batt_info.level)
997 power->batt_info.online = online;
998 power->batt_info.status = status;
999 power->batt_info.health = health;
1000 power->batt_info.level = level;
1002 power_supply_changed(&power->battery);
1007 static __devinit int wm831x_power_probe(struct platform_device *pdev)
1009 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
1010 struct wm831x_power *power;
1011 struct power_supply *usb;
1012 struct power_supply *battery;
1013 struct power_supply *wall;
1016 power = kzalloc(sizeof(struct wm831x_power), GFP_KERNEL);
1020 power->wm831x = wm831x;
1021 platform_set_drvdata(pdev, power);
1024 battery = &power->battery;
1025 wall = &power->wall;
1027 /* We ignore configuration failures since we can still read back
1028 * the status without enabling the charger.
1030 wm831x_config_battery(wm831x);
1032 wall->name = "wm831x-wall";
1033 wall->type = POWER_SUPPLY_TYPE_MAINS;
1034 wall->properties = wm831x_wall_props;
1035 wall->num_properties = ARRAY_SIZE(wm831x_wall_props);
1036 wall->get_property = wm831x_wall_get_prop;
1037 ret = power_supply_register(&pdev->dev, wall);
1041 battery->name = "wm831x-battery";
1042 battery->properties = wm831x_bat_props;
1043 battery->num_properties = ARRAY_SIZE(wm831x_bat_props);
1044 battery->get_property = wm831x_bat_get_prop;
1045 battery->use_for_apm = 1;
1046 ret = power_supply_register(&pdev->dev, battery);
1050 usb->name = "wm831x-usb",
1051 usb->type = POWER_SUPPLY_TYPE_USB;
1052 usb->properties = wm831x_usb_props;
1053 usb->num_properties = ARRAY_SIZE(wm831x_usb_props);
1054 usb->get_property = wm831x_usb_get_prop;
1055 ret = power_supply_register(&pdev->dev, usb);
1059 irq = platform_get_irq_byname(pdev, "SYSLO");
1060 ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq,
1061 IRQF_TRIGGER_RISING, "System power low",
1064 dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
1069 irq = platform_get_irq_byname(pdev, "PWR SRC");
1070 ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq,
1071 IRQF_TRIGGER_RISING, "Power source",
1074 dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n",
1079 #ifdef CONFIG_WM831X_WITH_BATTERY
1080 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
1081 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
1082 ret = request_threaded_irq(irq, NULL, wm831x_bat_irq,
1083 IRQF_TRIGGER_RISING,
1086 WM_BATT_DBG("%s: %s irq no %d\n", __FUNCTION__, wm831x_bat_irqs[i], irq);
1089 "Failed to request %s IRQ %d: %d\n",
1090 wm831x_bat_irqs[i], irq, ret);
1096 power->interval = TIMER_MS_COUNTS;
1097 power->batt_info.level = 100;
1098 power->batt_info.voltage = 4200000;
1099 power->batt_info.online = 1;
1100 power->batt_info.status = POWER_SUPPLY_STATUS_DISCHARGING;
1101 power->batt_info.health = POWER_SUPPLY_HEALTH_GOOD;
1103 wake_lock_init(&power->syslo_wake, WAKE_LOCK_SUSPEND, "wm831x_syslo_wake");
1104 INIT_WORK(&power->batt_work, wm831x_batt_work);
1105 setup_timer(&power->timer, wm831x_batt_timer_handler, (unsigned long)power);
1106 power->timer.expires = jiffies + msecs_to_jiffies(1000);
1107 add_timer(&power->timer);
1109 g_wm831x_power = power;
1110 printk("%s:wm831x_power initialized\n",__FUNCTION__);
1111 power_test_sysfs_init();
1114 #ifdef CONFIG_WM831X_WITH_BATTERY
1116 for (; i >= 0; i--) {
1117 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
1118 free_irq(irq, power);
1120 irq = platform_get_irq_byname(pdev, "PWR SRC");
1121 free_irq(irq, power);
1125 irq = platform_get_irq_byname(pdev, "SYSLO");
1126 free_irq(irq, power);
1128 power_supply_unregister(usb);
1130 power_supply_unregister(battery);
1132 power_supply_unregister(wall);
1138 static __devexit int wm831x_power_remove(struct platform_device *pdev)
1140 struct wm831x_power *wm831x_power = platform_get_drvdata(pdev);
1142 #ifdef CONFIG_WM831X_WITH_BATTERY
1143 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
1144 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
1145 free_irq(irq, wm831x_power);
1148 irq = platform_get_irq_byname(pdev, "PWR SRC");
1149 free_irq(irq, wm831x_power);
1151 irq = platform_get_irq_byname(pdev, "SYSLO");
1152 free_irq(irq, wm831x_power);
1154 power_supply_unregister(&wm831x_power->battery);
1155 power_supply_unregister(&wm831x_power->wall);
1156 power_supply_unregister(&wm831x_power->usb);
1157 kfree(wm831x_power);
1162 static int wm831x_battery_suspend(struct platform_device *dev, pm_message_t state)
1164 struct wm831x_power *power = (struct wm831x_power *)platform_get_drvdata(dev);
1165 flush_scheduled_work();
1166 del_timer(&power->timer);
1170 static int wm831x_battery_resume(struct platform_device *dev)
1172 struct wm831x_power *power = (struct wm831x_power *)platform_get_drvdata(dev);
1173 power->timer.expires = jiffies + msecs_to_jiffies(power->interval);
1174 add_timer(&power->timer);
1178 #define wm831x_battery_suspend NULL
1179 #define wm831x_battery_resume NULL
1182 static struct platform_driver wm831x_power_driver = {
1183 .probe = wm831x_power_probe,
1184 .remove = __devexit_p(wm831x_power_remove),
1185 .suspend = wm831x_battery_suspend,
1186 .resume = wm831x_battery_resume,
1188 .name = "wm831x-power",
1191 static int __init wm831x_power_init(void)
1193 return platform_driver_register(&wm831x_power_driver);
1195 module_init(wm831x_power_init);
1197 static void __exit wm831x_power_exit(void)
1199 platform_driver_unregister(&wm831x_power_driver);
1201 module_exit(wm831x_power_exit);
1204 static ssize_t power_prop_show(struct device *dev,
1205 struct device_attribute *attr, char *buf)
1208 int level, power_status, system_status, chg_ctl1, chg_ctl2, chg_status;
1209 union power_supply_propval val;
1211 if (!g_wm831x_power)
1213 power_status = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_POWER_STATE);
1214 if (power_status < 0)
1215 return power_status;
1216 //printk("wm831x power status %#x\n", ret);
1218 system_status = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_SYSTEM_STATUS);
1219 if (system_status < 0)
1220 return system_status;
1221 //printk("wm831x system status %#x\n", ret);
1223 chg_ctl1 = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_CHARGER_CONTROL_1);
1226 //printk("wm831x charger control1 %#x\n", ret);
1228 chg_ctl2 = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_CHARGER_CONTROL_2);
1231 //printk("wm831x charger control2 %#x\n", ret);
1233 chg_status = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_CHARGER_STATUS);
1236 //printk("wm831x charger status %#x\n", ret);
1238 ret = wm831x_power_read_voltage(g_wm831x_power->wm831x, WM831X_AUX_BATT, &val);
1241 wm831x_batt_vol_level(g_wm831x_power, val.intval / 1000, &level);
1242 //printk("batt_vol = %d batt_level = %d\n", val.intval, level);
1244 sprintf(buf, "power_status=%#x\n"
1245 "system_status=%#x\n"
1250 "batt_level=%d%%\n",
1258 ret = strlen(buf) + 1;
1262 static DEVICE_ATTR(prop, 0444, power_prop_show, NULL);
1264 static struct kobject *power_test_kobj;
1266 static int power_test_sysfs_init(void)
1269 power_test_kobj = kobject_create_and_add("power_test_prop", NULL);
1270 if (power_test_kobj == NULL) {
1272 "power_test_sysfs_init:"\
1273 "subsystem_register failed\n");
1277 ret = sysfs_create_file(power_test_kobj, &dev_attr_prop.attr);
1280 "power_test_sysfs_init:"\
1281 "sysfs_create_group failed\n");
1287 kobject_del(power_test_kobj);
1293 MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
1294 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
1295 MODULE_LICENSE("GPL");
1296 MODULE_ALIAS("platform:wm831x-power");