drivers/power/wm831x_power.c

   1 /*
   2  * PMU driver for Wolfson Microelectronics wm831x PMICs
   3  *
   4  * Copyright 2009 Wolfson Microelectronics PLC.
   5  *
   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.
   9  */
  10
  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>
  16
  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>
  22
  23 #define WM831X_DEBUG
  24 #undef  WM831X_DEBUG
  25
  26 #ifdef WM831X_DEBUG
  27 #define WM_BATT_DBG(x...) printk(KERN_INFO x)
  28 #else
  29 #define WM_BATT_DBG(x...)  do {} while (0)
  30 #endif
  31
  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)
  36
  37 #define batt_num   52
  38
  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
  50 };
  51
  52 static int batt_disp_table[batt_num] = {
  53         0,1,2,3,5,7,
  54         9,11,13,15,17,
  55         19,21,23,25,27,
  56         29,31,33,35,37,
  57         39,41,43,45,47,
  58         49,51,53,55,57,
  59         59,61,63,65,67,
  60         69,71,73,75,77,
  61         79,81,83,85,87,
  62         89,91,93,95,97,100
  63 };
  64
  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
  76 };
  77
  78
  79
  80 #define TIMER_MS_COUNTS 1000
  81 struct wm_batt_priv_data {
  82         int online;
  83         int status;
  84         int health;
  85         int level;
  86         int temp;
  87         int voltage;
  88 };
  89
  90 struct wm831x_power {
  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;
  99         int interval;
 100 };
 101
 102 struct wm831x_power *g_wm831x_power;
 103
 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);
 107
 108 int wm831x_read_on_pin_status(void)
 109 {
 110         int ret;
 111
 112         if(!g_wm831x_power)
 113         {
 114                 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
 115                 return -1;
 116         }
 117
 118         ret = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_ON_PIN_CONTROL);
 119         if (ret < 0)
 120                 return ret;
 121
 122         return !(ret & WM831X_ON_PIN_STS) ? 1 : 0;
 123 }
 124
 125 static int wm831x_power_check_online(struct wm831x *wm831x, int supply,
 126                                      union power_supply_propval *val)
 127 {
 128         int ret;
 129
 130         ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
 131         if (ret < 0)
 132                 return ret;
 133
 134         if (ret & supply)
 135                 val->intval = 1;
 136         else
 137                 val->intval = 0;
 138
 139         return 0;
 140 }
 141
 142 int wm831x_read_chg_status(void)
 143 {
 144         int ret, usb_chg = 0, wall_chg = 0;
 145
 146         if(!g_wm831x_power)
 147         {
 148                 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
 149                 return -1;
 150         }
 151
 152         ret = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_SYSTEM_STATUS);
 153         if (ret < 0)
 154                 return ret;
 155
 156         if (ret & WM831X_PWR_USB)
 157                 usb_chg = 1;
 158         if (ret & WM831X_PWR_WALL)
 159                 wall_chg = 1;
 160
 161         return ((usb_chg | wall_chg) ? 1 : 0);
 162 }
 163
 164 static int wm831x_power_read_voltage(struct wm831x *wm831x,
 165                                      enum wm831x_auxadc src,
 166                                      union power_supply_propval *val)
 167 {
 168         int ret;
 169         ret = wm831x_auxadc_read_uv(wm831x, src);
 170         if (ret >= 0)
 171                 val->intval = ret / 1000;
 172
 173         return ret ;
 174 }
 175
 176 int wm831x_read_batt_voltage(void)
 177 {
 178         int ret = 0;
 179
 180         if(!g_wm831x_power)
 181         {
 182                 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
 183                 return -1;
 184         }
 185
 186         ret = wm831x_auxadc_read_uv(g_wm831x_power->wm831x, WM831X_AUX_BATT);
 187         return ret / 1000;
 188 }
 189 //EXPORT_SYMBOL_GPL(wm831x_get_batt_voltage);
 190
 191 /*********************************************************************
 192  *              WALL Power
 193  *********************************************************************/
 194 static int wm831x_wall_get_prop(struct power_supply *psy,
 195                                 enum power_supply_property psp,
 196                                 union power_supply_propval *val)
 197 {
 198         struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
 199         struct wm831x *wm831x = wm831x_power->wm831x;
 200         int ret = 0;
 201
 202         switch (psp) {
 203         case POWER_SUPPLY_PROP_ONLINE:
 204                 ret = wm831x_power_check_online(wm831x, WM831X_PWR_WALL, val);
 205                 break;
 206         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 207                 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_WALL, val);
 208                 break;
 209         default:
 210                 ret = -EINVAL;
 211                 break;
 212         }
 213
 214         return ret;
 215 }
 216
 217 static enum power_supply_property wm831x_wall_props[] = {
 218         POWER_SUPPLY_PROP_ONLINE,
 219         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 220 };
 221
 222 /*********************************************************************
 223  *              USB Power
 224  *********************************************************************/
 225 static int wm831x_usb_get_prop(struct power_supply *psy,
 226                                enum power_supply_property psp,
 227                                union power_supply_propval *val)
 228 {
 229         struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
 230         struct wm831x *wm831x = wm831x_power->wm831x;
 231         int ret = 0;
 232
 233         switch (psp) {
 234         case POWER_SUPPLY_PROP_ONLINE:
 235                 ret = wm831x_power_check_online(wm831x, WM831X_PWR_USB, val);
 236                 break;
 237         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 238                 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_USB, val);
 239                 break;
 240         default:
 241                 ret = -EINVAL;
 242                 break;
 243         }
 244
 245         return ret;
 246 }
 247
 248 static enum power_supply_property wm831x_usb_props[] = {
 249         POWER_SUPPLY_PROP_ONLINE,
 250         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 251 };
 252
 253 /*********************************************************************
 254  *              Battery properties
 255  *********************************************************************/
 256
 257 struct chg_map {
 258         int val;
 259         int reg_val;
 260 };
 261
 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 },
 267 };
 268
 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 },
 274 };
 275
 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 },
 293 };
 294
 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 },
 304 };
 305
 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 },
 323 };
 324
 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},
 334 };
 335
 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},
 345 };
 346
 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,
 350                                        const char *units)
 351 {
 352         int i;
 353         for (i = 0; i < count; i++)
 354                 if (val == map[i].val)
 355                         break;
 356         if (i == count) {
 357                 dev_err(wm831x->dev, "Invalid %s %d%s\n",
 358                         name, val, units);
 359         } else {
 360                 *reg |= map[i].reg_val;
 361                 dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units);
 362         }
 363 }
 364
 365 static void wm831x_config_battery(struct wm831x *wm831x)
 366 {
 367         struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
 368         struct wm831x_battery_pdata *pdata;
 369         int ret, reg1, reg2, reg3;
 370
 371         if (!wm831x_pdata || !wm831x_pdata->battery) {
 372                 dev_warn(wm831x->dev,
 373                          "No battery charger configuration\n");
 374                 return;
 375         }
 376
 377         pdata = wm831x_pdata->battery;
 378
 379         reg1 = 0;
 380         reg2 = 0;
 381         reg3 = 0;
 382
 383         if (!pdata->enable) {
 384                 dev_info(wm831x->dev, "Battery charger disabled\n");
 385                 return;
 386         }
 387
 388         reg1 |= WM831X_CHG_ENA;
 389         if (pdata->off_mask)
 390                 reg2 |= WM831X_CHG_OFF_MSK;
 391         if (pdata->fast_enable)
 392                 reg1 |= WM831X_CHG_FAST;
 393
 394         wm831x_battey_apply_config(wm831x, trickle_ilims,
 395                                    ARRAY_SIZE(trickle_ilims),
 396                                    pdata->trickle_ilim, &reg2,
 397                                    "trickle charge current limit", "mA");
 398
 399         wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels),
 400                                    pdata->vsel, &reg2,
 401                                    "target voltage", "mV");
 402
 403         wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims),
 404                                    pdata->fast_ilim, &reg2,
 405                                    "fast charge current limit", "mA");
 406
 407         wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms),
 408                                    pdata->eoc_iterm, &reg1,
 409                                    "end of charge current threshold", "mA");
 410
 411         wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times),
 412                                    pdata->timeout, &reg2,
 413                                    "charger timeout", "min");
 414
 415         wm831x_battey_apply_config(wm831x, chg_syslos, ARRAY_SIZE(chg_syslos),
 416                                    pdata->syslo, &reg3,
 417                                    "syslo voltage", "mV");
 418
 419         wm831x_battey_apply_config(wm831x, chg_sysoks, ARRAY_SIZE(chg_sysoks),
 420                                    pdata->sysok, &reg3,
 421                                    "sysok voltage", "mV");
 422
 423         ret = wm831x_reg_unlock(wm831x);
 424         if (ret != 0) {
 425                 dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
 426                 return;
 427         }
 428
 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,
 433                               reg1);
 434         if (ret != 0) {
 435                 dev_err(wm831x->dev, "Failed to set charger control 1: %d\n",
 436                         ret);
 437         }
 438         ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2,
 439                               WM831X_CHG_OFF_MSK |
 440                               WM831X_CHG_TIME_MASK |
 441                               WM831X_CHG_FAST_ILIM_MASK |
 442                               WM831X_CHG_TRKL_ILIM_MASK |
 443                               WM831X_CHG_VSEL_MASK,
 444                               reg2);
 445         if (ret != 0) {
 446                 dev_err(wm831x->dev, "Failed to set charger control 2: %d\n",
 447                         ret);
 448         }
 449
 450         ret = wm831x_set_bits(wm831x, WM831X_SYSVDD_CONTROL,
 451                                           WM831X_CHG_SYSLO_MASK |
 452                                                   WM831X_CHG_SYSOK_MASK,
 453                                                   reg3);
 454         if (ret < 0) {
 455                 dev_err(wm831x->dev, "Failed to set sysvdd control reg: %d\n",ret);
 456         }
 457
 458         wm831x_reg_lock(wm831x);
 459 }
 460
 461 static int wm831x_bat_check_status(struct wm831x *wm831x, int *status)
 462 {
 463         int ret;
 464
 465         ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
 466         if (ret < 0)
 467                 return ret;
 468
 469         if (ret & WM831X_PWR_SRC_BATT) {
 470                 *status = POWER_SUPPLY_STATUS_DISCHARGING;
 471                 return 0;
 472         }
 473
 474         ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
 475         if (ret < 0)
 476                 return ret;
 477
 478         switch (ret & WM831X_CHG_STATE_MASK) {
 479         case WM831X_CHG_STATE_OFF:
 480                 *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
 481                 break;
 482         case WM831X_CHG_STATE_TRICKLE:
 483         case WM831X_CHG_STATE_FAST:
 484                 *status = POWER_SUPPLY_STATUS_CHARGING;
 485                 break;
 486
 487         default:
 488                 *status = POWER_SUPPLY_STATUS_UNKNOWN;
 489                 break;
 490         }
 491
 492         return 0;
 493 }
 494 int wm831x_read_bat_charging_status(void)
 495 {
 496         int ret, status;
 497
 498         if(!g_wm831x_power)
 499         {
 500                 printk("err:%s:g_wm831x_power address is 0\n",__FUNCTION__);
 501                 return -1;
 502         }
 503
 504         ret = wm831x_bat_check_status(g_wm831x_power->wm831x, &status);
 505         if (ret < 0)
 506                 return ret;
 507         if (status == POWER_SUPPLY_STATUS_CHARGING)
 508                 return 1;
 509         return 0;
 510 }
 511
 512 static int wm831x_bat_check_type(struct wm831x *wm831x, int *type)
 513 {
 514         int ret;
 515 #ifdef WM831X_DEBUG_0
 516         ret = wm831x_reg_read(wm831x, WM831X_POWER_STATE);
 517         if (ret < 0)
 518                 return ret;
 519         WM_BATT_DBG("%s: wm831x power status %#x\n", __FUNCTION__, ret);
 520
 521         ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
 522         if (ret < 0)
 523                 return ret;
 524         WM_BATT_DBG("%s: wm831x system status %#x\n", __FUNCTION__, ret);
 525
 526         ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_1);
 527         if (ret < 0)
 528                 return ret;
 529         WM_BATT_DBG("%s: wm831x charger control1 %#x\n", __FUNCTION__, ret);
 530
 531         ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_2);
 532         if (ret < 0)
 533                 return ret;
 534         WM_BATT_DBG("%s: wm831x charger control2 %#x\n", __FUNCTION__, ret);
 535
 536         ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
 537         if (ret < 0)
 538                 return ret;
 539         WM_BATT_DBG("%s: wm831x charger status %#x\n\n", __FUNCTION__, ret);
 540 #endif
 541
 542         ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
 543         if (ret < 0)
 544                 return ret;
 545
 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;
 550                 break;
 551         case WM831X_CHG_STATE_FAST:
 552         case WM831X_CHG_STATE_FAST_OT:
 553                 *type = POWER_SUPPLY_CHARGE_TYPE_FAST;
 554                 break;
 555         default:
 556                 *type = POWER_SUPPLY_CHARGE_TYPE_NONE;
 557                 break;
 558         }
 559
 560         return 0;
 561 }
 562
 563 static int wm831x_bat_check_health(struct wm831x *wm831x, int *health)
 564 {
 565         int ret;
 566
 567         ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
 568         if (ret < 0)
 569                 return ret;
 570
 571         if (ret & WM831X_BATT_HOT_STS) {
 572                 *health = POWER_SUPPLY_HEALTH_OVERHEAT;
 573                 return 0;
 574         }
 575
 576         if (ret & WM831X_BATT_COLD_STS) {
 577                 *health = POWER_SUPPLY_HEALTH_COLD;
 578                 return 0;
 579         }
 580
 581         if (ret & WM831X_BATT_OV_STS) {
 582                 *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
 583                 return 0;
 584         }
 585
 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;
 590                 break;
 591         case WM831X_CHG_STATE_DEFECTIVE:
 592                 *health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
 593                 break;
 594         default:
 595                 *health = POWER_SUPPLY_HEALTH_GOOD;
 596                 break;
 597         }
 598
 599         return 0;
 600 }
 601
 602 static int wm831x_bat_get_prop(struct power_supply *psy,
 603                                enum power_supply_property psp,
 604                                union power_supply_propval *val)
 605 {
 606         struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
 607         struct wm831x *wm831x = wm831x_power->wm831x;
 608         int ret = 0;
 609
 610         switch (psp) {
 611         case POWER_SUPPLY_PROP_STATUS:
 612                 ret = wm831x_bat_check_status(wm831x, &val->intval);
 613                 //val->intval = wm831x_power->batt_info.status;
 614                 break;
 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;
 619                 break;
 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*1000;//uV
 623                 break;
 624         case POWER_SUPPLY_PROP_HEALTH:
 625                 //ret = wm831x_bat_check_health(wm831x, &val->intval);
 626                 val->intval = wm831x_power->batt_info.health;
 627                 break;
 628         case POWER_SUPPLY_PROP_CHARGE_TYPE:
 629                 ret = wm831x_bat_check_type(wm831x, &val->intval);
 630                 break;
 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;
 636                 break;
 637         case POWER_SUPPLY_PROP_TEMP:
 638                 val->intval = 0;
 639                 break;
 640         case POWER_SUPPLY_PROP_TECHNOLOGY:
 641                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
 642                 break;
 643         default:
 644                 ret = -EINVAL;
 645                 break;
 646         }
 647
 648         return ret;
 649 }
 650
 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,
 660 };
 661
 662 #ifdef CONFIG_WM831X_WITH_BATTERY
 663 static const char *wm831x_bat_irqs[] = {
 664         "BATT HOT",
 665         "BATT COLD",
 666         "BATT FAIL",
 667         "OV",
 668         "END",
 669         "TO",
 670         "MODE",
 671         "START",
 672 };
 673
 674 static irqreturn_t wm831x_bat_irq(int irq, void *data)
 675 {
 676         struct wm831x_power *wm831x_power = data;
 677         struct wm831x *wm831x = wm831x_power->wm831x;
 678         int irq0;
 679
 680         irq0 = wm831x->irq_base + WM831X_IRQ_CHG_BATT_HOT + 1;
 681         dev_crit(wm831x->dev, "battery changed: i=%d\n", irq-irq0);
 682
 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);
 686
 687         return IRQ_HANDLED;
 688 }
 689 #endif
 690
 691 /*********************************************************************
 692  *              Initialisation
 693  *********************************************************************/
 694
 695 static irqreturn_t wm831x_syslo_irq(int irq, void *data)
 696 {
 697         struct wm831x_power *wm831x_power = data;
 698         struct wm831x *wm831x = wm831x_power->wm831x;
 699
 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 and wake lock 60s\n");
 703         wake_lock_timeout(&wm831x_power->syslo_wake,60*HZ);//wait for android closing system
 704         return IRQ_HANDLED;
 705 }
 706
 707 static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
 708 {
 709         struct wm831x_power *wm831x_power = data;
 710         struct wm831x *wm831x = wm831x_power->wm831x;
 711
 712         dev_dbg(wm831x->dev, "Power source changed\n");
 713         WM_BATT_DBG("%s:Power source changed\n", __FUNCTION__);
 714         /* Just notify for everything - little harm in overnotifying. */
 715         power_supply_changed(&wm831x_power->battery);
 716         power_supply_changed(&wm831x_power->usb);
 717         power_supply_changed(&wm831x_power->wall);
 718
 719         return IRQ_HANDLED;
 720 }
 721
 722 static void wm831x_batt_timer_handler(unsigned long data)
 723 {
 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));
 727 }
 728
 729 void wm831x_batt_vol_level(struct wm831x_power *wm831x_power, int batt_vol, int *level)
 730 {
 731         int i, ret, status;
 732         static int chg_plus = 1000;
 733         static int chg_minus = 1000;
 734         static int chg_curr = 0;
 735         static int chg_num = 60;
 736         static int disp_plus = 1000;
 737         static int disp_minus = 1000;
 738         static int disp_curr = 0;
 739         static int disp_num = 50;
 740
 741
 742         *level = wm831x_power->batt_info.level;
 743         ret = wm831x_bat_check_status(wm831x_power->wm831x, &status);
 744         if (ret < 0) {
 745                 printk("%s: check bat status failer...err = %d\n", __FUNCTION__, ret);
 746                 return;
 747         }
 748
 749         if (status == POWER_SUPPLY_STATUS_NOT_CHARGING
 750                         && batt_vol >= batt_step_table[batt_num-1]) {
 751                 *level = 100;
 752                 return;
 753         }
 754
 755         if (status == POWER_SUPPLY_STATUS_CHARGING)
 756         {
 757                 disp_plus = 0;
 758                 disp_minus = 0;
 759                 disp_curr = 0;
 760
 761                 for(i = 0; i < batt_num; i++){
 762                         if((batt_chg_step_table[i] <= batt_vol) &&
 763                                          (batt_chg_step_table[i+1] > batt_vol))
 764                                 break;
 765                 }
 766                 *level = batt_disp_table[i];
 767
 768                 if (batt_vol <= batt_chg_step_table[0])
 769                         *level = 0;
 770                 if (batt_vol >= batt_chg_step_table[batt_num - 1])
 771                         *level = 100;
 772
 773                 // ³õÊ¼×´Ì¬
 774                 if ((chg_plus == 1000) && (chg_minus == 1000))
 775                 {
 776                         *level = *level;
 777                         chg_plus = 0;
 778                         chg_minus = 0;
 779                         chg_curr = 0;
 780                 }
 781                 else
 782                 {
 783
 784                         if (*level >= (wm831x_power->batt_info.level+1))
 785                         {
 786                                 chg_minus = 0;
 787                                 chg_curr = 0;
 788
 789                                 if (++chg_plus > chg_num)
 790                                 {
 791                                         *level = wm831x_power->batt_info.level + 1;
 792                                         chg_plus = 0;
 793
 794                                         if(*level < 85)
 795                                         chg_num = 60;
 796                                         else
 797                                         chg_num = 20;
 798
 799                                 }
 800                                 else
 801                                 {
 802                                         *level = wm831x_power->batt_info.level;
 803                                 }
 804                         }
 805
 806                         else if (*level >= wm831x_power->batt_info.level)
 807                         {
 808                                 chg_plus = 0;
 809                                 chg_minus = 0;
 810
 811                                 if (++chg_curr > chg_num)
 812                                 {
 813                                         *level = *level;
 814                                         chg_curr = 0;
 815                                 }
 816                                 else
 817                                 {
 818                                         *level = wm831x_power->batt_info.level;
 819                                 }
 820                         }
 821                         else if (*level < (wm831x_power->batt_info.level-1))
 822                         {
 823                                 chg_plus = 0;
 824                                 chg_curr = 0;
 825
 826                                 if (++chg_minus > (chg_num<<1))
 827                                 {
 828                                         *level = wm831x_power->batt_info.level - 1;
 829                                         chg_minus = 0;
 830
 831                                         if(*level < 85)
 832                                         chg_num = 60;
 833                                         else
 834                                         chg_num = 20;
 835
 836                                 }
 837                                 else
 838                                 {
 839                                         *level = wm831x_power->batt_info.level;
 840                                 }
 841                         }
 842                         else
 843                         {
 844                                 chg_plus = 0;
 845                                 chg_minus = 0;
 846                                 chg_curr = 0;
 847                                 *level = wm831x_power->batt_info.level;
 848                         }
 849                 }
 850
 851
 852                 if (*level >= 100)
 853                         *level = 100;
 854                 if (*level < 0)
 855                         *level = 0;
 856         }
 857         else
 858         {
 859                 chg_plus = 0;
 860                 chg_minus = 0;
 861                 chg_curr = 0;
 862
 863                 for(i = 0; i < batt_num; i++){
 864                         if(batt_vol >= batt_step_table[i] &&
 865                                          batt_vol < batt_step_table[i+1])
 866                                 break;
 867                 }
 868                 *level = batt_disp_table[i];
 869
 870                 if (batt_vol <= batt_step_table[0])
 871                         *level = 0;
 872                 if (batt_vol >= batt_step_table[batt_num - 1])
 873                         *level = 100;
 874
 875                 // ³õÊ¼×´Ì¬
 876                 if ((disp_plus == 1000) && (disp_minus == 1000))
 877                 {
 878                         *level = *level;
 879                         disp_plus = 0;
 880                         disp_minus = 0;
 881                         disp_curr = 0;
 882                 }
 883                 else
 884                 {
 885
 886                         if (*level <= (wm831x_power->batt_info.level-1))
 887                         {
 888                                 disp_plus = 0;
 889                                 disp_curr = 0;
 890
 891                                 if (++disp_minus > disp_num)
 892                                 {
 893                                         *level = wm831x_power->batt_info.level - 1;
 894                                         disp_minus = 0;
 895
 896                                         if((*level < 17) || (*level > 85))
 897                                         disp_num = 10;
 898                                         else
 899                                         disp_num = 50;
 900
 901                                 }
 902                                 else
 903                                 {
 904                                         *level = wm831x_power->batt_info.level;
 905                                 }
 906                         }
 907                         else if (*level <= wm831x_power->batt_info.level)
 908                         {
 909                                 disp_plus = 0;
 910                                 disp_minus = 0;
 911
 912                                 if (++disp_curr > disp_num)
 913                                 {
 914                                         *level = *level;
 915                                         disp_curr = 0;
 916                                 }
 917                                 else
 918                                 {
 919                                         *level = wm831x_power->batt_info.level;
 920                                 }
 921                         }
 922                         else if (*level >= (wm831x_power->batt_info.level+1))
 923                         {
 924                                 disp_minus = 0;
 925                                 disp_curr = 0;
 926
 927                                 if (++disp_plus > (disp_num<<1))
 928                                 {
 929                                         *level = wm831x_power->batt_info.level + 1;
 930                                         disp_plus = 0;
 931                                         if((*level < 17) || (*level > 85))
 932                                         disp_num = 10;
 933                                         else
 934                                         disp_num = 50;
 935                                 }
 936                                 else
 937                                 {
 938                                         *level = wm831x_power->batt_info.level;
 939                                 }
 940                         }
 941                         else
 942                         {
 943                                 disp_plus = 0;
 944                                 disp_minus = 0;
 945                                 disp_curr = 0;
 946                                 *level = wm831x_power->batt_info.level;
 947                         }
 948                 }
 949
 950                 if (*level >= 100)
 951                         *level = 100;
 952                 if (*level < 0)
 953                         *level = 0;
 954         }
 955 }
 956
 957 static void wm831x_batt_work(struct work_struct *work)
 958 {
 959         int online, status,health,level, ret;
 960     union power_supply_propval val;
 961         struct wm831x_power *power = container_of(work, struct wm831x_power, batt_work);
 962
 963         ret = wm831x_power_check_online(power->wm831x, WM831X_PWR_SRC_BATT, &val);
 964         if (ret < 0) {
 965                 printk("%s: check bat online failer...  err = %d\n", __FUNCTION__, ret);
 966                 return;
 967         }
 968         online = val.intval;
 969
 970         ret = wm831x_bat_check_status(power->wm831x, &status);
 971         if (ret < 0) {
 972                 printk("%s: check bat status failer...  err = %d\n", __FUNCTION__, ret);
 973                 return;
 974         }
 975
 976         ret = wm831x_bat_check_health(power->wm831x, &health);
 977         if (ret < 0) {
 978                 printk("%s: check bat health failer...  err = %d\n", __FUNCTION__, ret);
 979                 return;
 980         }
 981
 982         ret = wm831x_power_read_voltage(power->wm831x, WM831X_AUX_BATT, &val);
 983         if (ret < 0) {
 984                 printk("%s: read bat voltage failer...err = %d\n", __FUNCTION__, ret);
 985                 return;
 986         }
 987         power->batt_info.voltage = val.intval;
 988
 989         wm831x_batt_vol_level(power, val.intval, &level);
 990         //mod_timer(&power->timer, jiffies + msecs_to_jiffies(power->interval));
 991
 992         if (online != power->batt_info.online || status != power->batt_info.status
 993                         || health != power->batt_info.health || level != power->batt_info.level)
 994         {
 995                 power->batt_info.online = online;
 996                 power->batt_info.status = status;
 997                 power->batt_info.health = health;
 998                 power->batt_info.level  = level;
 999
1000                 power_supply_changed(&power->battery);
1001         }
1002
1003 }
1004
1005 static __devinit int wm831x_power_probe(struct platform_device *pdev)
1006 {
1007         struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
1008         struct wm831x_power *power;
1009         struct power_supply *usb;
1010         struct power_supply *battery;
1011         struct power_supply *wall;
1012         int ret, irq, i;
1013
1014         power = kzalloc(sizeof(struct wm831x_power), GFP_KERNEL);
1015         if (power == NULL)
1016                 return -ENOMEM;
1017
1018         power->wm831x = wm831x;
1019         platform_set_drvdata(pdev, power);
1020
1021         usb = &power->usb;
1022         battery = &power->battery;
1023         wall = &power->wall;
1024
1025         /* We ignore configuration failures since we can still read back
1026          * the status without enabling the charger.
1027          */
1028         wm831x_config_battery(wm831x);
1029
1030         wall->name = "wm831x-wall";
1031         wall->type = POWER_SUPPLY_TYPE_MAINS;
1032         wall->properties = wm831x_wall_props;
1033         wall->num_properties = ARRAY_SIZE(wm831x_wall_props);
1034         wall->get_property = wm831x_wall_get_prop;
1035         ret = power_supply_register(&pdev->dev, wall);
1036         if (ret)
1037                 goto err_kmalloc;
1038
1039         battery->name = "wm831x-battery";
1040         battery->properties = wm831x_bat_props;
1041         battery->num_properties = ARRAY_SIZE(wm831x_bat_props);
1042         battery->get_property = wm831x_bat_get_prop;
1043         battery->use_for_apm = 1;
1044         ret = power_supply_register(&pdev->dev, battery);
1045         if (ret)
1046                 goto err_wall;
1047
1048         usb->name = "wm831x-usb",
1049         usb->type = POWER_SUPPLY_TYPE_USB;
1050         usb->properties = wm831x_usb_props;
1051         usb->num_properties = ARRAY_SIZE(wm831x_usb_props);
1052         usb->get_property = wm831x_usb_get_prop;
1053         ret = power_supply_register(&pdev->dev, usb);
1054         if (ret)
1055                 goto err_battery;
1056
1057         irq = platform_get_irq_byname(pdev, "SYSLO");
1058         ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq,
1059                                    IRQF_TRIGGER_RISING, "System power low",
1060                                    power);
1061         if (ret != 0) {
1062                 dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
1063                         irq, ret);
1064                 goto err_usb;
1065         }
1066
1067         irq = platform_get_irq_byname(pdev, "PWR SRC");
1068         ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq,
1069                                    IRQF_TRIGGER_RISING, "Power source",
1070                                    power);
1071         if (ret != 0) {
1072                 dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n",
1073                         irq, ret);
1074                 goto err_syslo;
1075         }
1076
1077 #ifdef CONFIG_WM831X_WITH_BATTERY
1078         for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
1079                 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
1080                 ret = request_threaded_irq(irq, NULL, wm831x_bat_irq,
1081                                            IRQF_TRIGGER_RISING,
1082                                            wm831x_bat_irqs[i],
1083                                            power);
1084                 WM_BATT_DBG("%s: %s irq no %d\n", __FUNCTION__, wm831x_bat_irqs[i], irq);
1085                 if (ret != 0) {
1086                         dev_err(&pdev->dev,
1087                                 "Failed to request %s IRQ %d: %d\n",
1088                                 wm831x_bat_irqs[i], irq, ret);
1089                         goto err_bat_irq;
1090                 }
1091         }
1092 #endif
1093
1094         power->interval = TIMER_MS_COUNTS;
1095         power->batt_info.level = 100;
1096         power->batt_info.voltage   = 4200;
1097         power->batt_info.online    = 1;
1098         power->batt_info.status    = POWER_SUPPLY_STATUS_DISCHARGING;
1099         power->batt_info.health    = POWER_SUPPLY_HEALTH_GOOD;
1100
1101         wake_lock_init(&power->syslo_wake, WAKE_LOCK_SUSPEND, "wm831x_syslo_wake");
1102         INIT_WORK(&power->batt_work, wm831x_batt_work);
1103         setup_timer(&power->timer, wm831x_batt_timer_handler, (unsigned long)power);
1104         power->timer.expires = jiffies + msecs_to_jiffies(1000);
1105         add_timer(&power->timer);
1106
1107         g_wm831x_power = power;
1108         printk("%s:wm831x_power initialized\n",__FUNCTION__);
1109         power_test_sysfs_init();
1110         return ret;
1111
1112 #ifdef CONFIG_WM831X_WITH_BATTERY
1113 err_bat_irq:
1114         for (; i >= 0; i--) {
1115                 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
1116                 free_irq(irq, power);
1117         }
1118         irq = platform_get_irq_byname(pdev, "PWR SRC");
1119         free_irq(irq, power);
1120 #endif
1121
1122 err_syslo:
1123         irq = platform_get_irq_byname(pdev, "SYSLO");
1124         free_irq(irq, power);
1125 err_usb:
1126         power_supply_unregister(usb);
1127 err_battery:
1128         power_supply_unregister(battery);
1129 err_wall:
1130         power_supply_unregister(wall);
1131 err_kmalloc:
1132         kfree(power);
1133         return ret;
1134 }
1135
1136 static __devexit int wm831x_power_remove(struct platform_device *pdev)
1137 {
1138         struct wm831x_power *wm831x_power = platform_get_drvdata(pdev);
1139         int irq, i;
1140 #ifdef CONFIG_WM831X_WITH_BATTERY
1141         for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
1142                 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
1143                 free_irq(irq, wm831x_power);
1144         }
1145 #endif
1146         irq = platform_get_irq_byname(pdev, "PWR SRC");
1147         free_irq(irq, wm831x_power);
1148
1149         irq = platform_get_irq_byname(pdev, "SYSLO");
1150         free_irq(irq, wm831x_power);
1151
1152         power_supply_unregister(&wm831x_power->battery);
1153         power_supply_unregister(&wm831x_power->wall);
1154         power_supply_unregister(&wm831x_power->usb);
1155         kfree(wm831x_power);
1156         return 0;
1157 }
1158
1159 #ifdef CONFIG_PM
1160 static int wm831x_battery_suspend(struct platform_device *dev, pm_message_t state)
1161 {
1162         struct wm831x_power *power = (struct wm831x_power *)platform_get_drvdata(dev);
1163         flush_scheduled_work();
1164         del_timer(&power->timer);
1165         return 0;
1166 }
1167
1168 static int wm831x_battery_resume(struct platform_device *dev)
1169 {
1170         struct wm831x_power *power = (struct wm831x_power *)platform_get_drvdata(dev);
1171         power->timer.expires = jiffies + msecs_to_jiffies(power->interval);
1172         add_timer(&power->timer);
1173         return 0;
1174 }
1175 #else
1176 #define wm831x_battery_suspend NULL
1177 #define wm831x_battery_resume  NULL
1178 #endif
1179
1180 static struct platform_driver wm831x_power_driver = {
1181         .probe = wm831x_power_probe,
1182         .remove = __devexit_p(wm831x_power_remove),
1183         .suspend = wm831x_battery_suspend,
1184         .resume = wm831x_battery_resume,
1185         .driver = {
1186                 .name = "wm831x-power",
1187         },
1188 };
1189 static int __init wm831x_power_init(void)
1190 {
1191         return platform_driver_register(&wm831x_power_driver);
1192 }
1193 module_init(wm831x_power_init);
1194
1195 static void __exit wm831x_power_exit(void)
1196 {
1197         platform_driver_unregister(&wm831x_power_driver);
1198 }
1199 module_exit(wm831x_power_exit);
1200
1201
1202 static ssize_t power_prop_show(struct device *dev,
1203                 struct device_attribute *attr, char *buf)
1204 {
1205         ssize_t ret = 0;
1206         int level, power_status, system_status, chg_ctl1, chg_ctl2, chg_status;
1207     union power_supply_propval val;
1208
1209         if (!g_wm831x_power)
1210                 return -1;
1211         power_status = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_POWER_STATE);
1212         if (power_status < 0)
1213                 return power_status;
1214         //printk("wm831x power status %#x\n", ret);
1215
1216         system_status = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_SYSTEM_STATUS);
1217         if (system_status < 0)
1218                 return system_status;
1219         //printk("wm831x system status %#x\n", ret);
1220
1221         chg_ctl1 = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_CHARGER_CONTROL_1);
1222         if (chg_ctl1 < 0)
1223                 return chg_ctl1;
1224         //printk("wm831x charger control1 %#x\n", ret);
1225
1226         chg_ctl2 = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_CHARGER_CONTROL_2);
1227         if (chg_ctl2 < 0)
1228                 return chg_ctl2;
1229         //printk("wm831x charger control2 %#x\n", ret);
1230
1231         chg_status = wm831x_reg_read(g_wm831x_power->wm831x, WM831X_CHARGER_STATUS);
1232         if (chg_status < 0)
1233                 return chg_status;
1234         //printk("wm831x charger status %#x\n", ret);
1235
1236         ret = wm831x_power_read_voltage(g_wm831x_power->wm831x, WM831X_AUX_BATT, &val);
1237         if (ret < 0)
1238                 return ret;
1239         wm831x_batt_vol_level(g_wm831x_power, val.intval, &level);
1240         //printk("batt_vol = %d batt_level = %d\n", val.intval, level);
1241         //
1242         sprintf(buf, "power_status=%#x\n"
1243                              "system_status=%#x\n"
1244                                  "chg_ctl1=%#x\n"
1245                                  "chg_ctl2=%#x\n"
1246                                  "chg_status=%#x\n"
1247                                  "batt_vol=%d\n"
1248                                  "batt_level=%d%%\n",
1249                                  power_status,
1250                                  system_status,
1251                                  chg_ctl1,
1252                                  chg_ctl2,
1253                                  chg_status,
1254                                  val.intval,
1255                                  level);
1256         ret = strlen(buf) + 1;
1257         return ret;
1258 }
1259
1260 static DEVICE_ATTR(prop, 0444, power_prop_show, NULL);
1261
1262 static struct kobject *power_test_kobj;
1263
1264 static int power_test_sysfs_init(void)
1265 {
1266         int ret ;
1267         power_test_kobj = kobject_create_and_add("power_test_prop", NULL);
1268         if (power_test_kobj == NULL) {
1269                 printk(KERN_ERR
1270                        "power_test_sysfs_init:"\
1271                        "subsystem_register failed\n");
1272                 ret = -ENOMEM;
1273                 goto err;
1274         }
1275         ret = sysfs_create_file(power_test_kobj, &dev_attr_prop.attr);
1276         if (ret) {
1277                 printk(KERN_ERR
1278                        "power_test_sysfs_init:"\
1279                        "sysfs_create_group failed\n");
1280                 goto err1;
1281         }
1282
1283         return 0 ;
1284 err1:
1285         kobject_del(power_test_kobj);
1286 err:
1287         return ret ;
1288 }
1289
1290
1291 MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
1292 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
1293 MODULE_LICENSE("GPL");
1294 MODULE_ALIAS("platform:wm831x-power");