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 3380,3405,3440,3475,3505,3525,
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;
101 struct wm831x_power *g_wm831x_power;
103 static int power_test_sysfs_init(void);
104 extern void wm831x_batt_vol_level(struct wm831x_power *power, int batt_vol, int *level);
105 static DEFINE_MUTEX(charging_mutex);
107 int wm831x_read_on_pin_status(void)
113 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
117 ret = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_ON_PIN_CONTROL);
121 return !(ret & WM831X_ON_PIN_STS) ? 1 : 0;
124 static int wm831x_power_check_online(struct wm831x *wm831x, int supply,
125 union power_supply_propval *val)
129 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
141 int wm831x_read_chg_status(void)
143 int ret, usb_chg = 0, wall_chg = 0;
147 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
151 ret = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_SYSTEM_STATUS);
155 if (ret & WM831X_PWR_USB)
157 if (ret & WM831X_PWR_WALL)
160 return ((usb_chg | wall_chg) ? 1 : 0);
163 static int wm831x_power_read_voltage(struct wm831x *wm831x,
164 enum wm831x_auxadc src,
165 union power_supply_propval *val)
168 ret = wm831x_auxadc_read_uv(wm831x, src);
170 val->intval = ret / 1000;
175 int wm831x_read_batt_voltage(void)
181 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
185 ret = wm831x_auxadc_read_uv(g_wm831x_power->wm831x, WM831X_AUX_BATT);
188 //EXPORT_SYMBOL_GPL(wm831x_get_batt_voltage);
190 /*********************************************************************
192 *********************************************************************/
193 static int wm831x_wall_get_prop(struct power_supply *psy,
194 enum power_supply_property psp,
195 union power_supply_propval *val)
197 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
198 struct wm831x *wm831x = wm831x_power->wm831x;
202 case POWER_SUPPLY_PROP_ONLINE:
203 ret = wm831x_power_check_online(wm831x, WM831X_PWR_WALL, val);
205 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
206 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_WALL, val);
216 static enum power_supply_property wm831x_wall_props[] = {
217 POWER_SUPPLY_PROP_ONLINE,
218 POWER_SUPPLY_PROP_VOLTAGE_NOW,
221 /*********************************************************************
223 *********************************************************************/
224 static int wm831x_usb_get_prop(struct power_supply *psy,
225 enum power_supply_property psp,
226 union power_supply_propval *val)
228 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
229 struct wm831x *wm831x = wm831x_power->wm831x;
233 case POWER_SUPPLY_PROP_ONLINE:
234 ret = wm831x_power_check_online(wm831x, WM831X_PWR_USB, val);
236 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
237 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_USB, val);
247 static enum power_supply_property wm831x_usb_props[] = {
248 POWER_SUPPLY_PROP_ONLINE,
249 POWER_SUPPLY_PROP_VOLTAGE_NOW,
252 /*********************************************************************
254 *********************************************************************/
261 static struct chg_map trickle_ilims[] = {
262 { 50, 0 << WM831X_CHG_TRKL_ILIM_SHIFT },
263 { 100, 1 << WM831X_CHG_TRKL_ILIM_SHIFT },
264 { 150, 2 << WM831X_CHG_TRKL_ILIM_SHIFT },
265 { 200, 3 << WM831X_CHG_TRKL_ILIM_SHIFT },
268 static struct chg_map vsels[] = {
269 { 4050, 0 << WM831X_CHG_VSEL_SHIFT },
270 { 4100, 1 << WM831X_CHG_VSEL_SHIFT },
271 { 4150, 2 << WM831X_CHG_VSEL_SHIFT },
272 { 4200, 3 << WM831X_CHG_VSEL_SHIFT },
275 static struct chg_map fast_ilims[] = {
276 { 0, 0 << WM831X_CHG_FAST_ILIM_SHIFT },
277 { 50, 1 << WM831X_CHG_FAST_ILIM_SHIFT },
278 { 100, 2 << WM831X_CHG_FAST_ILIM_SHIFT },
279 { 150, 3 << WM831X_CHG_FAST_ILIM_SHIFT },
280 { 200, 4 << WM831X_CHG_FAST_ILIM_SHIFT },
281 { 250, 5 << WM831X_CHG_FAST_ILIM_SHIFT },
282 { 300, 6 << WM831X_CHG_FAST_ILIM_SHIFT },
283 { 350, 7 << WM831X_CHG_FAST_ILIM_SHIFT },
284 { 400, 8 << WM831X_CHG_FAST_ILIM_SHIFT },
285 { 450, 9 << WM831X_CHG_FAST_ILIM_SHIFT },
286 { 500, 10 << WM831X_CHG_FAST_ILIM_SHIFT },
287 { 600, 11 << WM831X_CHG_FAST_ILIM_SHIFT },
288 { 700, 12 << WM831X_CHG_FAST_ILIM_SHIFT },
289 { 800, 13 << WM831X_CHG_FAST_ILIM_SHIFT },
290 { 900, 14 << WM831X_CHG_FAST_ILIM_SHIFT },
291 { 1000, 15 << WM831X_CHG_FAST_ILIM_SHIFT },
294 static struct chg_map eoc_iterms[] = {
295 { 20, 0 << WM831X_CHG_ITERM_SHIFT },
296 { 30, 1 << WM831X_CHG_ITERM_SHIFT },
297 { 40, 2 << WM831X_CHG_ITERM_SHIFT },
298 { 50, 3 << WM831X_CHG_ITERM_SHIFT },
299 { 60, 4 << WM831X_CHG_ITERM_SHIFT },
300 { 70, 5 << WM831X_CHG_ITERM_SHIFT },
301 { 80, 6 << WM831X_CHG_ITERM_SHIFT },
302 { 90, 7 << WM831X_CHG_ITERM_SHIFT },
305 static struct chg_map chg_times[] = {
306 { 60, 0 << WM831X_CHG_TIME_SHIFT },
307 { 90, 1 << WM831X_CHG_TIME_SHIFT },
308 { 120, 2 << WM831X_CHG_TIME_SHIFT },
309 { 150, 3 << WM831X_CHG_TIME_SHIFT },
310 { 180, 4 << WM831X_CHG_TIME_SHIFT },
311 { 210, 5 << WM831X_CHG_TIME_SHIFT },
312 { 240, 6 << WM831X_CHG_TIME_SHIFT },
313 { 270, 7 << WM831X_CHG_TIME_SHIFT },
314 { 300, 8 << WM831X_CHG_TIME_SHIFT },
315 { 330, 9 << WM831X_CHG_TIME_SHIFT },
316 { 360, 10 << WM831X_CHG_TIME_SHIFT },
317 { 390, 11 << WM831X_CHG_TIME_SHIFT },
318 { 420, 12 << WM831X_CHG_TIME_SHIFT },
319 { 450, 13 << WM831X_CHG_TIME_SHIFT },
320 { 480, 14 << WM831X_CHG_TIME_SHIFT },
321 { 510, 15 << WM831X_CHG_TIME_SHIFT },
324 static struct chg_map chg_syslos[] = {
325 { 2800, 0 << WM831X_CHG_SYSLO_SHIFT},
326 { 2900, 1 << WM831X_CHG_SYSLO_SHIFT},
327 { 3000, 2 << WM831X_CHG_SYSLO_SHIFT},
328 { 3100, 3 << WM831X_CHG_SYSLO_SHIFT},
329 { 3200, 4 << WM831X_CHG_SYSLO_SHIFT},
330 { 3300, 5 << WM831X_CHG_SYSLO_SHIFT},
331 { 3400, 6 << WM831X_CHG_SYSLO_SHIFT},
332 { 3500, 7 << WM831X_CHG_SYSLO_SHIFT},
335 static struct chg_map chg_sysoks[] = {
336 { 2800, 0 << WM831X_CHG_SYSOK_SHIFT},
337 { 2900, 1 << WM831X_CHG_SYSOK_SHIFT},
338 { 3000, 2 << WM831X_CHG_SYSOK_SHIFT},
339 { 3100, 3 << WM831X_CHG_SYSOK_SHIFT},
340 { 3200, 4 << WM831X_CHG_SYSOK_SHIFT},
341 { 3300, 5 << WM831X_CHG_SYSOK_SHIFT},
342 { 3400, 6 << WM831X_CHG_SYSOK_SHIFT},
343 { 3500, 7 << WM831X_CHG_SYSOK_SHIFT},
346 static void wm831x_battey_apply_config(struct wm831x *wm831x,
347 struct chg_map *map, int count, int val,
348 int *reg, const char *name,
352 for (i = 0; i < count; i++)
353 if (val == map[i].val)
356 dev_err(wm831x->dev, "Invalid %s %d%s\n",
359 *reg |= map[i].reg_val;
360 dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units);
364 static void wm831x_config_battery(struct wm831x *wm831x)
366 struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
367 struct wm831x_battery_pdata *pdata;
368 int ret, reg1, reg2, reg3;
370 if (!wm831x_pdata || !wm831x_pdata->battery) {
371 dev_warn(wm831x->dev,
372 "No battery charger configuration\n");
376 pdata = wm831x_pdata->battery;
382 if (!pdata->enable) {
383 dev_info(wm831x->dev, "Battery charger disabled\n");
387 reg1 |= WM831X_CHG_ENA;
389 reg2 |= WM831X_CHG_OFF_MSK;
390 if (pdata->fast_enable)
391 reg1 |= WM831X_CHG_FAST;
393 wm831x_battey_apply_config(wm831x, trickle_ilims,
394 ARRAY_SIZE(trickle_ilims),
395 pdata->trickle_ilim, ®2,
396 "trickle charge current limit", "mA");
398 wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels),
400 "target voltage", "mV");
402 wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims),
403 pdata->fast_ilim, ®2,
404 "fast charge current limit", "mA");
406 wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms),
407 pdata->eoc_iterm, ®1,
408 "end of charge current threshold", "mA");
410 wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times),
411 pdata->timeout, ®2,
412 "charger timeout", "min");
414 wm831x_battey_apply_config(wm831x, chg_syslos, ARRAY_SIZE(chg_syslos),
416 "syslo voltage", "mV");
418 wm831x_battey_apply_config(wm831x, chg_sysoks, ARRAY_SIZE(chg_sysoks),
420 "sysok voltage", "mV");
422 ret = wm831x_reg_unlock(wm831x);
424 dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
428 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1,
429 WM831X_CHG_ENA_MASK |
430 WM831X_CHG_FAST_MASK |
431 WM831X_CHG_ITERM_MASK,
434 dev_err(wm831x->dev, "Failed to set charger control 1: %d\n",
437 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2,
439 WM831X_CHG_TIME_MASK |
440 WM831X_CHG_FAST_ILIM_MASK |
441 WM831X_CHG_TRKL_ILIM_MASK |
442 WM831X_CHG_VSEL_MASK,
445 dev_err(wm831x->dev, "Failed to set charger control 2: %d\n",
449 ret = wm831x_set_bits(wm831x, WM831X_SYSVDD_CONTROL,
450 WM831X_CHG_SYSLO_MASK |
451 WM831X_CHG_SYSOK_MASK,
454 dev_err(wm831x->dev, "Failed to set sysvdd control reg: %d\n",ret);
457 wm831x_reg_lock(wm831x);
460 static int wm831x_bat_check_status(struct wm831x *wm831x, int *status)
464 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
468 if (ret & WM831X_PWR_SRC_BATT) {
469 *status = POWER_SUPPLY_STATUS_DISCHARGING;
473 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
478 switch (ret & WM831X_CHG_STATE_MASK) {
479 case WM831X_CHG_STATE_OFF:
480 *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
482 case WM831X_CHG_STATE_TRICKLE:
483 case WM831X_CHG_STATE_FAST:
484 *status = POWER_SUPPLY_STATUS_CHARGING;
488 *status = POWER_SUPPLY_STATUS_UNKNOWN;
494 int wm831x_read_bat_charging_status(void)
500 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
504 ret = wm831x_bat_check_status(g_wm831x_power->wm831x, &status);
507 if (status == POWER_SUPPLY_STATUS_CHARGING)
512 static int wm831x_bat_check_type(struct wm831x *wm831x, int *type)
515 #ifdef WM831X_DEBUG_0
516 ret = wm831x_reg_read(wm831x, WM831X_POWER_STATE);
519 WM_BATT_DBG("%s: wm831x power status %#x\n", __FUNCTION__, ret);
521 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
524 WM_BATT_DBG("%s: wm831x system status %#x\n", __FUNCTION__, ret);
526 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_1);
529 WM_BATT_DBG("%s: wm831x charger control1 %#x\n", __FUNCTION__, ret);
531 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_2);
534 WM_BATT_DBG("%s: wm831x charger control2 %#x\n", __FUNCTION__, ret);
536 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
539 WM_BATT_DBG("%s: wm831x charger status %#x\n\n", __FUNCTION__, ret);
542 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
546 switch (ret & WM831X_CHG_STATE_MASK) {
547 case WM831X_CHG_STATE_TRICKLE:
548 case WM831X_CHG_STATE_TRICKLE_OT:
549 *type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
551 case WM831X_CHG_STATE_FAST:
552 case WM831X_CHG_STATE_FAST_OT:
553 *type = POWER_SUPPLY_CHARGE_TYPE_FAST;
556 *type = POWER_SUPPLY_CHARGE_TYPE_NONE;
563 static int wm831x_bat_check_health(struct wm831x *wm831x, int *health)
567 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
571 if (ret & WM831X_BATT_HOT_STS) {
572 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
576 if (ret & WM831X_BATT_COLD_STS) {
577 *health = POWER_SUPPLY_HEALTH_COLD;
581 if (ret & WM831X_BATT_OV_STS) {
582 *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
586 switch (ret & WM831X_CHG_STATE_MASK) {
587 case WM831X_CHG_STATE_TRICKLE_OT:
588 case WM831X_CHG_STATE_FAST_OT:
589 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
591 case WM831X_CHG_STATE_DEFECTIVE:
592 *health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
595 *health = POWER_SUPPLY_HEALTH_GOOD;
602 static int wm831x_bat_get_prop(struct power_supply *psy,
603 enum power_supply_property psp,
604 union power_supply_propval *val)
606 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
607 struct wm831x *wm831x = wm831x_power->wm831x;
611 case POWER_SUPPLY_PROP_STATUS:
612 ret = wm831x_bat_check_status(wm831x, &val->intval);
613 //val->intval = wm831x_power->batt_info.status;
615 case POWER_SUPPLY_PROP_PRESENT:
616 case POWER_SUPPLY_PROP_ONLINE:
617 //ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT, val);
618 val->intval = wm831x_power->batt_info.online;
620 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
621 //ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val);
622 val->intval = wm831x_power->batt_info.voltage;
624 case POWER_SUPPLY_PROP_HEALTH:
625 //ret = wm831x_bat_check_health(wm831x, &val->intval);
626 val->intval = wm831x_power->batt_info.health;
628 case POWER_SUPPLY_PROP_CHARGE_TYPE:
629 ret = wm831x_bat_check_type(wm831x, &val->intval);
631 case POWER_SUPPLY_PROP_CAPACITY:
632 //ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val);
633 //wm831x_batt_vol_level(wm831x_power, val->intval, &level);
634 //val->intval = level;
635 val->intval = wm831x_power->batt_info.level;
637 case POWER_SUPPLY_PROP_TEMP:
640 case POWER_SUPPLY_PROP_TECHNOLOGY:
641 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
651 static enum power_supply_property wm831x_bat_props[] = {
652 POWER_SUPPLY_PROP_STATUS,
653 POWER_SUPPLY_PROP_HEALTH,
654 POWER_SUPPLY_PROP_PRESENT,
655 POWER_SUPPLY_PROP_VOLTAGE_NOW,
656 POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
657 POWER_SUPPLY_PROP_TECHNOLOGY,
658 POWER_SUPPLY_PROP_TEMP,
659 POWER_SUPPLY_PROP_CHARGE_TYPE,
662 #ifdef CONFIG_WM831X_WITH_BATTERY
663 static const char *wm831x_bat_irqs[] = {
674 static irqreturn_t wm831x_bat_irq(int irq, void *data)
676 struct wm831x_power *wm831x_power = data;
677 struct wm831x *wm831x = wm831x_power->wm831x;
680 irq0 = wm831x->irq_base + WM831X_IRQ_CHG_BATT_HOT + 1;
681 dev_crit(wm831x->dev, "battery changed: i=%d\n", irq-irq0);
683 /* The battery charger is autonomous so we don't need to do
684 * anything except kick user space */
685 power_supply_changed(&wm831x_power->battery);
691 /*********************************************************************
693 *********************************************************************/
695 static irqreturn_t wm831x_syslo_irq(int irq, void *data)
697 struct wm831x_power *wm831x_power = data;
698 struct wm831x *wm831x = wm831x_power->wm831x;
700 /* Not much we can actually *do* but tell people for
701 * posterity, we're probably about to run out of power. */
702 dev_crit(wm831x->dev, "SYSVDD under voltage\n");
706 static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
708 struct wm831x_power *wm831x_power = data;
709 struct wm831x *wm831x = wm831x_power->wm831x;
711 dev_dbg(wm831x->dev, "Power source changed\n");
712 WM_BATT_DBG("%s:Power source changed\n", __FUNCTION__);
713 /* Just notify for everything - little harm in overnotifying. */
714 power_supply_changed(&wm831x_power->battery);
715 power_supply_changed(&wm831x_power->usb);
716 power_supply_changed(&wm831x_power->wall);
722 static void wm831x_batt_timer_handler(unsigned long data)
724 struct wm831x_power *wm831x_power = (struct wm831x_power*)data;
725 schedule_work(&wm831x_power->batt_work);
726 mod_timer(&wm831x_power->timer, jiffies + msecs_to_jiffies(wm831x_power->interval));
729 void wm831x_batt_vol_level(struct wm831x_power *wm831x_power, int batt_vol, int *level)
732 static int count = 0;
733 static int disp_plus = 100;
734 static int disp_minus = 100;
735 static int disp_curr = 0;
737 *level = wm831x_power->batt_info.level;
738 ret = wm831x_bat_check_status(wm831x_power->wm831x, &status);
740 printk("%s: check bat status failer...err = %d\n", __FUNCTION__, ret);
744 if (status == POWER_SUPPLY_STATUS_NOT_CHARGING
745 && batt_vol >= batt_step_table[batt_num-1]) {
750 if (status == POWER_SUPPLY_STATUS_CHARGING) {
755 for(i = 0; i < batt_num; i++){
756 if((batt_chg_step_table[i] <= batt_vol) &&
757 (batt_chg_step_table[i+1] > batt_vol))
760 *level = batt_disp_table[i];
762 if (batt_vol <= batt_chg_step_table[0])
764 if (batt_vol >= batt_chg_step_table[batt_num - 1])
768 if (*level < wm831x_power->batt_info.level && count > 20)
769 *level = wm831x_power->batt_info.level;
779 for(i = 0; i < batt_num; i++){
780 if(batt_vol >= batt_step_table[i] &&
781 batt_vol < batt_step_table[i+1])
784 *level = batt_disp_table[i];
786 if (batt_vol <= batt_step_table[0])
788 if (batt_vol >= batt_step_table[batt_num - 1])
792 if ((disp_plus == 100) && (disp_minus == 100))
801 if (*level <= (wm831x_power->batt_info.level-3))
806 if (++disp_minus > 4)
808 *level = wm831x_power->batt_info.level - 3;
813 *level = wm831x_power->batt_info.level;
816 else if (*level <= wm831x_power->batt_info.level)
828 *level = wm831x_power->batt_info.level;
831 else if (*level >= (wm831x_power->batt_info.level+3))
836 if (++disp_plus > 10)
838 *level = wm831x_power->batt_info.level + 3;
843 *level = wm831x_power->batt_info.level;
851 *level = wm831x_power->batt_info.level;
862 static void wm831x_batt_work(struct work_struct *work)
864 int online, status,health,level, ret;
865 union power_supply_propval val;
866 struct wm831x_power *power = container_of(work, struct wm831x_power, batt_work);
868 ret = wm831x_power_check_online(power->wm831x, WM831X_PWR_SRC_BATT, &val);
870 printk("%s: check bat online failer... err = %d\n", __FUNCTION__, ret);
875 ret = wm831x_bat_check_status(power->wm831x, &status);
877 printk("%s: check bat status failer... err = %d\n", __FUNCTION__, ret);
881 ret = wm831x_bat_check_health(power->wm831x, &health);
883 printk("%s: check bat health failer... err = %d\n", __FUNCTION__, ret);
887 ret = wm831x_power_read_voltage(power->wm831x, WM831X_AUX_BATT, &val);
889 printk("%s: read bat voltage failer...err = %d\n", __FUNCTION__, ret);
892 power->batt_info.voltage = val.intval;
894 wm831x_batt_vol_level(power, val.intval, &level);
895 //mod_timer(&power->timer, jiffies + msecs_to_jiffies(power->interval));
897 if (online != power->batt_info.online || status != power->batt_info.status
898 || health != power->batt_info.health || level != power->batt_info.level)
900 power->batt_info.online = online;
901 power->batt_info.status = status;
902 power->batt_info.health = health;
903 power->batt_info.level = level;
905 power_supply_changed(&power->battery);
910 static __devinit int wm831x_power_probe(struct platform_device *pdev)
912 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
913 struct wm831x_power *power;
914 struct power_supply *usb;
915 struct power_supply *battery;
916 struct power_supply *wall;
919 power = kzalloc(sizeof(struct wm831x_power), GFP_KERNEL);
923 power->wm831x = wm831x;
924 platform_set_drvdata(pdev, power);
927 battery = &power->battery;
930 /* We ignore configuration failures since we can still read back
931 * the status without enabling the charger.
933 wm831x_config_battery(wm831x);
935 wall->name = "wm831x-wall";
936 wall->type = POWER_SUPPLY_TYPE_MAINS;
937 wall->properties = wm831x_wall_props;
938 wall->num_properties = ARRAY_SIZE(wm831x_wall_props);
939 wall->get_property = wm831x_wall_get_prop;
940 ret = power_supply_register(&pdev->dev, wall);
944 battery->name = "wm831x-battery";
945 battery->properties = wm831x_bat_props;
946 battery->num_properties = ARRAY_SIZE(wm831x_bat_props);
947 battery->get_property = wm831x_bat_get_prop;
948 battery->use_for_apm = 1;
949 ret = power_supply_register(&pdev->dev, battery);
953 usb->name = "wm831x-usb",
954 usb->type = POWER_SUPPLY_TYPE_USB;
955 usb->properties = wm831x_usb_props;
956 usb->num_properties = ARRAY_SIZE(wm831x_usb_props);
957 usb->get_property = wm831x_usb_get_prop;
958 ret = power_supply_register(&pdev->dev, usb);
962 irq = platform_get_irq_byname(pdev, "SYSLO");
963 ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq,
964 IRQF_TRIGGER_RISING, "System power low",
967 dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
972 irq = platform_get_irq_byname(pdev, "PWR SRC");
973 ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq,
974 IRQF_TRIGGER_RISING, "Power source",
977 dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n",
982 #ifdef CONFIG_WM831X_WITH_BATTERY
983 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
984 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
985 ret = request_threaded_irq(irq, NULL, wm831x_bat_irq,
989 WM_BATT_DBG("%s: %s irq no %d\n", __FUNCTION__, wm831x_bat_irqs[i], irq);
992 "Failed to request %s IRQ %d: %d\n",
993 wm831x_bat_irqs[i], irq, ret);
999 power->interval = TIMER_MS_COUNTS;
1000 power->batt_info.level = 100;
1001 power->batt_info.voltage = 4200;
1002 power->batt_info.online = 1;
1003 power->batt_info.status = POWER_SUPPLY_STATUS_DISCHARGING;
1004 power->batt_info.health = POWER_SUPPLY_HEALTH_GOOD;
1006 INIT_WORK(&power->batt_work, wm831x_batt_work);
1007 setup_timer(&power->timer, wm831x_batt_timer_handler, (unsigned long)power);
1008 power->timer.expires = jiffies + msecs_to_jiffies(1000);
1009 add_timer(&power->timer);
1011 g_wm831x_power = power;
1012 printk("%s:wm831x_power initialized\n",__FUNCTION__);
1013 power_test_sysfs_init();
1016 #ifdef CONFIG_WM831X_WITH_BATTERY
1018 for (; i >= 0; i--) {
1019 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
1020 free_irq(irq, power);
1022 irq = platform_get_irq_byname(pdev, "PWR SRC");
1023 free_irq(irq, power);
1027 irq = platform_get_irq_byname(pdev, "SYSLO");
1028 free_irq(irq, power);
1030 power_supply_unregister(usb);
1032 power_supply_unregister(battery);
1034 power_supply_unregister(wall);
1040 static __devexit int wm831x_power_remove(struct platform_device *pdev)
1042 struct wm831x_power *wm831x_power = platform_get_drvdata(pdev);
1044 #ifdef CONFIG_WM831X_WITH_BATTERY
1045 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
1046 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
1047 free_irq(irq, wm831x_power);
1050 irq = platform_get_irq_byname(pdev, "PWR SRC");
1051 free_irq(irq, wm831x_power);
1053 irq = platform_get_irq_byname(pdev, "SYSLO");
1054 free_irq(irq, wm831x_power);
1056 power_supply_unregister(&wm831x_power->battery);
1057 power_supply_unregister(&wm831x_power->wall);
1058 power_supply_unregister(&wm831x_power->usb);
1059 kfree(wm831x_power);
1064 static int wm831x_battery_suspend(struct platform_device *dev, pm_message_t state)
1066 struct wm831x_power *power = (struct wm831x_power *)platform_get_drvdata(dev);
1067 flush_scheduled_work();
1068 del_timer(&power->timer);
1072 static int wm831x_battery_resume(struct platform_device *dev)
1074 struct wm831x_power *power = (struct wm831x_power *)platform_get_drvdata(dev);
1075 power->timer.expires = jiffies + msecs_to_jiffies(power->interval);
1076 add_timer(&power->timer);
1080 #define wm831x_battery_suspend NULL
1081 #define wm831x_battery_resume NULL
1084 static struct platform_driver wm831x_power_driver = {
1085 .probe = wm831x_power_probe,
1086 .remove = __devexit_p(wm831x_power_remove),
1087 .suspend = wm831x_battery_suspend,
1088 .resume = wm831x_battery_resume,
1090 .name = "wm831x-power",
1093 static int __init wm831x_power_init(void)
1095 return platform_driver_register(&wm831x_power_driver);
1097 module_init(wm831x_power_init);
1099 static void __exit wm831x_power_exit(void)
1101 platform_driver_unregister(&wm831x_power_driver);
1103 module_exit(wm831x_power_exit);
1106 static ssize_t power_prop_show(struct device *dev,
1107 struct device_attribute *attr, char *buf)
1110 int level, power_status, system_status, chg_ctl1, chg_ctl2, chg_status;
1111 union power_supply_propval val;
1113 if (!g_wm831x_power)
1115 power_status = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_POWER_STATE);
1116 if (power_status < 0)
1117 return power_status;
1118 //printk("wm831x power status %#x\n", ret);
1120 system_status = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_SYSTEM_STATUS);
1121 if (system_status < 0)
1122 return system_status;
1123 //printk("wm831x system status %#x\n", ret);
1125 chg_ctl1 = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_CHARGER_CONTROL_1);
1128 //printk("wm831x charger control1 %#x\n", ret);
1130 chg_ctl2 = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_CHARGER_CONTROL_2);
1133 //printk("wm831x charger control2 %#x\n", ret);
1135 chg_status = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_CHARGER_STATUS);
1138 //printk("wm831x charger status %#x\n", ret);
1140 ret = wm831x_power_read_voltage(g_wm831x_power->wm831x, WM831X_AUX_BATT, &val);
1143 wm831x_batt_vol_level(g_wm831x_power, val.intval, &level);
1144 //printk("batt_vol = %d batt_level = %d\n", val.intval, level);
1146 sprintf(buf, "power_status=%#x\n"
1147 "system_status=%#x\n"
1152 "batt_level=%d%%\n",
1160 ret = strlen(buf) + 1;
1164 static DEVICE_ATTR(prop, 0444, power_prop_show, NULL);
1166 static struct kobject *power_test_kobj;
1168 static int power_test_sysfs_init(void)
1171 power_test_kobj = kobject_create_and_add("power_test_prop", NULL);
1172 if (power_test_kobj == NULL) {
1174 "power_test_sysfs_init:"\
1175 "subsystem_register failed\n");
1179 ret = sysfs_create_file(power_test_kobj, &dev_attr_prop.attr);
1182 "power_test_sysfs_init:"\
1183 "sysfs_create_group failed\n");
1189 kobject_del(power_test_kobj);
1195 MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
1196 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
1197 MODULE_LICENSE("GPL");
1198 MODULE_ALIAS("platform:wm831x-power");