Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Battery driver for Marvell 88PM860x PMIC |
| 3 | * |
| 4 | * Copyright (c) 2012 Marvell International Ltd. |
| 5 | * Author: Jett Zhou <jtzhou@marvell.com> |
| 6 | * Haojian Zhuang <haojian.zhuang@marvell.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/mutex.h> |
| 18 | #include <linux/string.h> |
| 19 | #include <linux/power_supply.h> |
| 20 | #include <linux/mfd/88pm860x.h> |
| 21 | #include <linux/delay.h> |
| 22 | |
| 23 | /* bit definitions of Status Query Interface 2 */ |
| 24 | #define STATUS2_CHG (1 << 2) |
| 25 | #define STATUS2_BAT (1 << 3) |
| 26 | #define STATUS2_VBUS (1 << 4) |
| 27 | |
| 28 | /* bit definitions of Measurement Enable 1 Register */ |
| 29 | #define MEAS1_TINT (1 << 3) |
| 30 | #define MEAS1_GP1 (1 << 5) |
| 31 | |
| 32 | /* bit definitions of Measurement Enable 3 Register */ |
| 33 | #define MEAS3_IBAT (1 << 0) |
| 34 | #define MEAS3_BAT_DET (1 << 1) |
| 35 | #define MEAS3_CC (1 << 2) |
| 36 | |
| 37 | /* bit definitions of Measurement Off Time Register */ |
| 38 | #define MEAS_OFF_SLEEP_EN (1 << 1) |
| 39 | |
| 40 | /* bit definitions of GPADC Bias Current 2 Register */ |
| 41 | #define GPBIAS2_GPADC1_SET (2 << 4) |
| 42 | /* GPADC1 Bias Current value in uA unit */ |
| 43 | #define GPBIAS2_GPADC1_UA ((GPBIAS2_GPADC1_SET >> 4) * 5 + 1) |
| 44 | |
| 45 | /* bit definitions of GPADC Misc 1 Register */ |
| 46 | #define GPMISC1_GPADC_EN (1 << 0) |
| 47 | |
| 48 | /* bit definitions of Charger Control 6 Register */ |
| 49 | #define CC6_BAT_DET_GPADC1 1 |
| 50 | |
| 51 | /* bit definitions of Coulomb Counter Reading Register */ |
| 52 | #define CCNT_AVG_SEL (4 << 3) |
| 53 | |
| 54 | /* bit definitions of RTC miscellaneous Register1 */ |
| 55 | #define RTC_SOC_5LSB (0x1F << 3) |
| 56 | |
| 57 | /* bit definitions of RTC Register1 */ |
| 58 | #define RTC_SOC_3MSB (0x7) |
| 59 | |
| 60 | /* bit definitions of Power up Log register */ |
| 61 | #define BAT_WU_LOG (1<<6) |
| 62 | |
| 63 | /* coulomb counter index */ |
| 64 | #define CCNT_POS1 0 |
| 65 | #define CCNT_POS2 1 |
| 66 | #define CCNT_NEG1 2 |
| 67 | #define CCNT_NEG2 3 |
| 68 | #define CCNT_SPOS 4 |
| 69 | #define CCNT_SNEG 5 |
| 70 | |
| 71 | /* OCV -- Open Circuit Voltage */ |
| 72 | #define OCV_MODE_ACTIVE 0 |
| 73 | #define OCV_MODE_SLEEP 1 |
| 74 | |
| 75 | /* Vbat range of CC for measuring Rbat */ |
| 76 | #define LOW_BAT_THRESHOLD 3600 |
| 77 | #define VBATT_RESISTOR_MIN 3800 |
| 78 | #define VBATT_RESISTOR_MAX 4100 |
| 79 | |
| 80 | /* TBAT for batt, TINT for chip itself */ |
| 81 | #define PM860X_TEMP_TINT (0) |
| 82 | #define PM860X_TEMP_TBAT (1) |
| 83 | |
| 84 | /* |
| 85 | * Battery temperature based on NTC resistor, defined |
| 86 | * corresponding resistor value -- Ohm / C degeree. |
| 87 | */ |
| 88 | #define TBAT_NEG_25D 127773 /* -25 */ |
| 89 | #define TBAT_NEG_10D 54564 /* -10 */ |
| 90 | #define TBAT_0D 32330 /* 0 */ |
| 91 | #define TBAT_10D 19785 /* 10 */ |
| 92 | #define TBAT_20D 12468 /* 20 */ |
| 93 | #define TBAT_30D 8072 /* 30 */ |
| 94 | #define TBAT_40D 5356 /* 40 */ |
| 95 | |
| 96 | struct pm860x_battery_info { |
| 97 | struct pm860x_chip *chip; |
| 98 | struct i2c_client *i2c; |
| 99 | struct device *dev; |
| 100 | |
| 101 | struct power_supply battery; |
| 102 | struct mutex lock; |
| 103 | int status; |
| 104 | int irq_cc; |
| 105 | int irq_batt; |
| 106 | int max_capacity; |
| 107 | int resistor; /* Battery Internal Resistor */ |
| 108 | int last_capacity; |
| 109 | int start_soc; |
| 110 | unsigned present:1; |
| 111 | unsigned temp_type:1; /* TINT or TBAT */ |
| 112 | }; |
| 113 | |
| 114 | struct ccnt { |
| 115 | unsigned long long int pos; |
| 116 | unsigned long long int neg; |
| 117 | unsigned int spos; |
| 118 | unsigned int sneg; |
| 119 | |
| 120 | int total_chg; /* mAh(3.6C) */ |
| 121 | int total_dischg; /* mAh(3.6C) */ |
| 122 | }; |
| 123 | |
| 124 | /* |
| 125 | * State of Charge. |
| 126 | * The first number is mAh(=3.6C), and the second number is percent point. |
| 127 | */ |
Anton Vorontsov | f1ade35 | 2012-08-22 20:31:33 -0700 | [diff] [blame] | 128 | static int array_soc[][2] = { |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 129 | {4170, 100}, {4154, 99}, {4136, 98}, {4122, 97}, {4107, 96}, |
| 130 | {4102, 95}, {4088, 94}, {4081, 93}, {4070, 92}, {4060, 91}, |
| 131 | {4053, 90}, {4044, 89}, {4035, 88}, {4028, 87}, {4019, 86}, |
| 132 | {4013, 85}, {4006, 84}, {3995, 83}, {3987, 82}, {3982, 81}, |
| 133 | {3976, 80}, {3968, 79}, {3962, 78}, {3954, 77}, {3946, 76}, |
| 134 | {3941, 75}, {3934, 74}, {3929, 73}, {3922, 72}, {3916, 71}, |
| 135 | {3910, 70}, {3904, 69}, {3898, 68}, {3892, 67}, {3887, 66}, |
| 136 | {3880, 65}, {3874, 64}, {3868, 63}, {3862, 62}, {3854, 61}, |
| 137 | {3849, 60}, {3843, 59}, {3840, 58}, {3833, 57}, {3829, 56}, |
| 138 | {3824, 55}, {3818, 54}, {3815, 53}, {3810, 52}, {3808, 51}, |
| 139 | {3804, 50}, {3801, 49}, {3798, 48}, {3796, 47}, {3792, 46}, |
| 140 | {3789, 45}, {3785, 44}, {3784, 43}, {3782, 42}, {3780, 41}, |
| 141 | {3777, 40}, {3776, 39}, {3774, 38}, {3772, 37}, {3771, 36}, |
| 142 | {3769, 35}, {3768, 34}, {3764, 33}, {3763, 32}, {3760, 31}, |
| 143 | {3760, 30}, {3754, 29}, {3750, 28}, {3749, 27}, {3744, 26}, |
| 144 | {3740, 25}, {3734, 24}, {3732, 23}, {3728, 22}, {3726, 21}, |
| 145 | {3720, 20}, {3716, 19}, {3709, 18}, {3703, 17}, {3698, 16}, |
| 146 | {3692, 15}, {3683, 14}, {3675, 13}, {3670, 12}, {3665, 11}, |
| 147 | {3661, 10}, {3649, 9}, {3637, 8}, {3622, 7}, {3609, 6}, |
| 148 | {3580, 5}, {3558, 4}, {3540, 3}, {3510, 2}, {3429, 1}, |
| 149 | }; |
| 150 | |
| 151 | static struct ccnt ccnt_data; |
| 152 | |
| 153 | /* |
| 154 | * register 1 bit[7:0] -- bit[11:4] of measured value of voltage |
| 155 | * register 0 bit[3:0] -- bit[3:0] of measured value of voltage |
| 156 | */ |
| 157 | static int measure_12bit_voltage(struct pm860x_battery_info *info, |
| 158 | int offset, int *data) |
| 159 | { |
| 160 | unsigned char buf[2]; |
| 161 | int ret; |
| 162 | |
| 163 | ret = pm860x_bulk_read(info->i2c, offset, 2, buf); |
| 164 | if (ret < 0) |
| 165 | return ret; |
| 166 | |
| 167 | *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f); |
| 168 | /* V_MEAS(mV) = data * 1.8 * 1000 / (2^12) */ |
| 169 | *data = ((*data & 0xfff) * 9 * 25) >> 9; |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static int measure_vbatt(struct pm860x_battery_info *info, int state, |
| 174 | int *data) |
| 175 | { |
| 176 | unsigned char buf[5]; |
| 177 | int ret; |
| 178 | |
| 179 | switch (state) { |
| 180 | case OCV_MODE_ACTIVE: |
| 181 | ret = measure_12bit_voltage(info, PM8607_VBAT_MEAS1, data); |
| 182 | if (ret) |
| 183 | return ret; |
| 184 | /* V_BATT_MEAS(mV) = value * 3 * 1.8 * 1000 / (2^12) */ |
| 185 | *data *= 3; |
| 186 | break; |
| 187 | case OCV_MODE_SLEEP: |
| 188 | /* |
| 189 | * voltage value of VBATT in sleep mode is saved in different |
| 190 | * registers. |
| 191 | * bit[11:10] -- bit[7:6] of LDO9(0x18) |
| 192 | * bit[9:8] -- bit[7:6] of LDO8(0x17) |
| 193 | * bit[7:6] -- bit[7:6] of LDO7(0x16) |
| 194 | * bit[5:4] -- bit[7:6] of LDO6(0x15) |
| 195 | * bit[3:0] -- bit[7:4] of LDO5(0x14) |
| 196 | */ |
| 197 | ret = pm860x_bulk_read(info->i2c, PM8607_LDO5, 5, buf); |
| 198 | if (ret < 0) |
| 199 | return ret; |
| 200 | ret = ((buf[4] >> 6) << 10) | ((buf[3] >> 6) << 8) |
| 201 | | ((buf[2] >> 6) << 6) | ((buf[1] >> 6) << 4) |
| 202 | | (buf[0] >> 4); |
| 203 | /* V_BATT_MEAS(mV) = data * 3 * 1.8 * 1000 / (2^12) */ |
| 204 | *data = ((*data & 0xff) * 27 * 25) >> 9; |
| 205 | break; |
| 206 | default: |
| 207 | return -EINVAL; |
| 208 | } |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | /* |
| 213 | * Return value is signed data. |
| 214 | * Negative value means discharging, and positive value means charging. |
| 215 | */ |
| 216 | static int measure_current(struct pm860x_battery_info *info, int *data) |
| 217 | { |
| 218 | unsigned char buf[2]; |
| 219 | short s; |
| 220 | int ret; |
| 221 | |
| 222 | ret = pm860x_bulk_read(info->i2c, PM8607_IBAT_MEAS1, 2, buf); |
| 223 | if (ret < 0) |
| 224 | return ret; |
| 225 | |
| 226 | s = ((buf[0] & 0xff) << 8) | (buf[1] & 0xff); |
| 227 | /* current(mA) = value * 0.125 */ |
| 228 | *data = s >> 3; |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | static int set_charger_current(struct pm860x_battery_info *info, int data, |
| 233 | int *old) |
| 234 | { |
| 235 | int ret; |
| 236 | |
| 237 | if (data < 50 || data > 1600 || !old) |
| 238 | return -EINVAL; |
| 239 | |
| 240 | data = ((data - 50) / 50) & 0x1f; |
| 241 | *old = pm860x_reg_read(info->i2c, PM8607_CHG_CTRL2); |
| 242 | *old = (*old & 0x1f) * 50 + 50; |
| 243 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f, data); |
| 244 | if (ret < 0) |
| 245 | return ret; |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | static int read_ccnt(struct pm860x_battery_info *info, int offset, |
| 250 | int *ccnt) |
| 251 | { |
| 252 | unsigned char buf[2]; |
| 253 | int ret; |
| 254 | |
| 255 | ret = pm860x_set_bits(info->i2c, PM8607_CCNT, 7, offset & 7); |
| 256 | if (ret < 0) |
| 257 | goto out; |
| 258 | ret = pm860x_bulk_read(info->i2c, PM8607_CCNT_MEAS1, 2, buf); |
| 259 | if (ret < 0) |
| 260 | goto out; |
| 261 | *ccnt = ((buf[0] & 0xff) << 8) | (buf[1] & 0xff); |
| 262 | return 0; |
| 263 | out: |
| 264 | return ret; |
| 265 | } |
| 266 | |
| 267 | static int calc_ccnt(struct pm860x_battery_info *info, struct ccnt *ccnt) |
| 268 | { |
| 269 | unsigned int sum; |
| 270 | int ret; |
| 271 | int data; |
| 272 | |
| 273 | ret = read_ccnt(info, CCNT_POS1, &data); |
| 274 | if (ret) |
| 275 | goto out; |
| 276 | sum = data & 0xffff; |
| 277 | ret = read_ccnt(info, CCNT_POS2, &data); |
| 278 | if (ret) |
| 279 | goto out; |
| 280 | sum |= (data & 0xffff) << 16; |
| 281 | ccnt->pos += sum; |
| 282 | |
| 283 | ret = read_ccnt(info, CCNT_NEG1, &data); |
| 284 | if (ret) |
| 285 | goto out; |
| 286 | sum = data & 0xffff; |
| 287 | ret = read_ccnt(info, CCNT_NEG2, &data); |
| 288 | if (ret) |
| 289 | goto out; |
| 290 | sum |= (data & 0xffff) << 16; |
| 291 | sum = ~sum + 1; /* since it's negative */ |
| 292 | ccnt->neg += sum; |
| 293 | |
| 294 | ret = read_ccnt(info, CCNT_SPOS, &data); |
| 295 | if (ret) |
| 296 | goto out; |
| 297 | ccnt->spos += data; |
| 298 | ret = read_ccnt(info, CCNT_SNEG, &data); |
| 299 | if (ret) |
| 300 | goto out; |
| 301 | |
| 302 | /* |
| 303 | * charge(mAh) = count * 1.6984 * 1e(-8) |
| 304 | * = count * 16984 * 1.024 * 1.024 * 1.024 / (2 ^ 40) |
| 305 | * = count * 18236 / (2 ^ 40) |
| 306 | */ |
| 307 | ccnt->total_chg = (int) ((ccnt->pos * 18236) >> 40); |
| 308 | ccnt->total_dischg = (int) ((ccnt->neg * 18236) >> 40); |
| 309 | return 0; |
| 310 | out: |
| 311 | return ret; |
| 312 | } |
| 313 | |
| 314 | static int clear_ccnt(struct pm860x_battery_info *info, struct ccnt *ccnt) |
| 315 | { |
| 316 | int data; |
| 317 | |
| 318 | memset(ccnt, 0, sizeof(*ccnt)); |
| 319 | /* read to clear ccnt */ |
| 320 | read_ccnt(info, CCNT_POS1, &data); |
| 321 | read_ccnt(info, CCNT_POS2, &data); |
| 322 | read_ccnt(info, CCNT_NEG1, &data); |
| 323 | read_ccnt(info, CCNT_NEG2, &data); |
| 324 | read_ccnt(info, CCNT_SPOS, &data); |
| 325 | read_ccnt(info, CCNT_SNEG, &data); |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | /* Calculate Open Circuit Voltage */ |
| 330 | static int calc_ocv(struct pm860x_battery_info *info, int *ocv) |
| 331 | { |
| 332 | int ret; |
| 333 | int i; |
| 334 | int data; |
| 335 | int vbatt_avg; |
| 336 | int vbatt_sum; |
| 337 | int ibatt_avg; |
| 338 | int ibatt_sum; |
| 339 | |
| 340 | if (!ocv) |
| 341 | return -EINVAL; |
| 342 | |
| 343 | for (i = 0, ibatt_sum = 0, vbatt_sum = 0; i < 10; i++) { |
| 344 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); |
| 345 | if (ret) |
| 346 | goto out; |
| 347 | vbatt_sum += data; |
| 348 | ret = measure_current(info, &data); |
| 349 | if (ret) |
| 350 | goto out; |
| 351 | ibatt_sum += data; |
| 352 | } |
| 353 | vbatt_avg = vbatt_sum / 10; |
| 354 | ibatt_avg = ibatt_sum / 10; |
| 355 | |
| 356 | mutex_lock(&info->lock); |
| 357 | if (info->present) |
| 358 | *ocv = vbatt_avg - ibatt_avg * info->resistor / 1000; |
| 359 | else |
| 360 | *ocv = vbatt_avg; |
| 361 | mutex_unlock(&info->lock); |
| 362 | dev_dbg(info->dev, "VBAT average:%d, OCV:%d\n", vbatt_avg, *ocv); |
| 363 | return 0; |
| 364 | out: |
| 365 | return ret; |
| 366 | } |
| 367 | |
| 368 | /* Calculate State of Charge (percent points) */ |
| 369 | static int calc_soc(struct pm860x_battery_info *info, int state, int *soc) |
| 370 | { |
| 371 | int i; |
| 372 | int ocv; |
| 373 | int count; |
| 374 | int ret = -EINVAL; |
| 375 | |
| 376 | if (!soc) |
| 377 | return -EINVAL; |
| 378 | |
| 379 | switch (state) { |
| 380 | case OCV_MODE_ACTIVE: |
| 381 | ret = calc_ocv(info, &ocv); |
| 382 | break; |
| 383 | case OCV_MODE_SLEEP: |
| 384 | ret = measure_vbatt(info, OCV_MODE_SLEEP, &ocv); |
| 385 | break; |
| 386 | } |
| 387 | if (ret) |
| 388 | return ret; |
| 389 | |
| 390 | count = ARRAY_SIZE(array_soc); |
| 391 | if (ocv < array_soc[count - 1][0]) { |
| 392 | *soc = 0; |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | for (i = 0; i < count; i++) { |
| 397 | if (ocv >= array_soc[i][0]) { |
| 398 | *soc = array_soc[i][1]; |
| 399 | break; |
| 400 | } |
| 401 | } |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | static irqreturn_t pm860x_coulomb_handler(int irq, void *data) |
| 406 | { |
| 407 | struct pm860x_battery_info *info = data; |
| 408 | |
| 409 | calc_ccnt(info, &ccnt_data); |
| 410 | return IRQ_HANDLED; |
| 411 | } |
| 412 | |
| 413 | static irqreturn_t pm860x_batt_handler(int irq, void *data) |
| 414 | { |
| 415 | struct pm860x_battery_info *info = data; |
| 416 | int ret; |
| 417 | |
| 418 | mutex_lock(&info->lock); |
| 419 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); |
| 420 | if (ret & STATUS2_BAT) { |
| 421 | info->present = 1; |
| 422 | info->temp_type = PM860X_TEMP_TBAT; |
| 423 | } else { |
| 424 | info->present = 0; |
| 425 | info->temp_type = PM860X_TEMP_TINT; |
| 426 | } |
| 427 | mutex_unlock(&info->lock); |
| 428 | /* clear ccnt since battery is attached or dettached */ |
| 429 | clear_ccnt(info, &ccnt_data); |
| 430 | return IRQ_HANDLED; |
| 431 | } |
| 432 | |
| 433 | static void pm860x_init_battery(struct pm860x_battery_info *info) |
| 434 | { |
| 435 | unsigned char buf[2]; |
| 436 | int ret; |
| 437 | int data; |
| 438 | int bat_remove; |
| 439 | int soc; |
| 440 | |
| 441 | /* measure enable on GPADC1 */ |
| 442 | data = MEAS1_GP1; |
| 443 | if (info->temp_type == PM860X_TEMP_TINT) |
| 444 | data |= MEAS1_TINT; |
| 445 | ret = pm860x_set_bits(info->i2c, PM8607_MEAS_EN1, data, data); |
| 446 | if (ret) |
| 447 | goto out; |
| 448 | |
| 449 | /* measure enable on IBAT, BAT_DET, CC. IBAT is depend on CC. */ |
| 450 | data = MEAS3_IBAT | MEAS3_BAT_DET | MEAS3_CC; |
| 451 | ret = pm860x_set_bits(info->i2c, PM8607_MEAS_EN3, data, data); |
| 452 | if (ret) |
| 453 | goto out; |
| 454 | |
| 455 | /* measure disable CC in sleep time */ |
| 456 | ret = pm860x_reg_write(info->i2c, PM8607_MEAS_OFF_TIME1, 0x82); |
| 457 | if (ret) |
| 458 | goto out; |
| 459 | ret = pm860x_reg_write(info->i2c, PM8607_MEAS_OFF_TIME2, 0x6c); |
| 460 | if (ret) |
| 461 | goto out; |
| 462 | |
| 463 | /* enable GPADC */ |
| 464 | ret = pm860x_set_bits(info->i2c, PM8607_GPADC_MISC1, |
| 465 | GPMISC1_GPADC_EN, GPMISC1_GPADC_EN); |
| 466 | if (ret < 0) |
| 467 | goto out; |
| 468 | |
| 469 | /* detect battery via GPADC1 */ |
| 470 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6, |
| 471 | CC6_BAT_DET_GPADC1, CC6_BAT_DET_GPADC1); |
| 472 | if (ret < 0) |
| 473 | goto out; |
| 474 | |
| 475 | ret = pm860x_set_bits(info->i2c, PM8607_CCNT, 7 << 3, |
| 476 | CCNT_AVG_SEL); |
| 477 | if (ret < 0) |
| 478 | goto out; |
| 479 | |
| 480 | /* set GPADC1 bias */ |
| 481 | ret = pm860x_set_bits(info->i2c, PM8607_GP_BIAS2, 0xF << 4, |
| 482 | GPBIAS2_GPADC1_SET); |
| 483 | if (ret < 0) |
| 484 | goto out; |
| 485 | |
| 486 | /* check whether battery present) */ |
| 487 | mutex_lock(&info->lock); |
| 488 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); |
| 489 | if (ret < 0) { |
| 490 | mutex_unlock(&info->lock); |
| 491 | goto out; |
| 492 | } |
| 493 | if (ret & STATUS2_BAT) { |
| 494 | info->present = 1; |
| 495 | info->temp_type = PM860X_TEMP_TBAT; |
| 496 | } else { |
| 497 | info->present = 0; |
| 498 | info->temp_type = PM860X_TEMP_TINT; |
| 499 | } |
| 500 | mutex_unlock(&info->lock); |
| 501 | |
| 502 | calc_soc(info, OCV_MODE_ACTIVE, &soc); |
| 503 | |
| 504 | data = pm860x_reg_read(info->i2c, PM8607_POWER_UP_LOG); |
| 505 | bat_remove = data & BAT_WU_LOG; |
| 506 | |
| 507 | dev_dbg(info->dev, "battery wake up? %s\n", |
| 508 | bat_remove != 0 ? "yes" : "no"); |
| 509 | |
| 510 | /* restore SOC from RTC domain register */ |
| 511 | if (bat_remove == 0) { |
| 512 | buf[0] = pm860x_reg_read(info->i2c, PM8607_RTC_MISC2); |
| 513 | buf[1] = pm860x_reg_read(info->i2c, PM8607_RTC1); |
| 514 | data = ((buf[1] & 0x3) << 5) | ((buf[0] >> 3) & 0x1F); |
| 515 | if (data > soc + 15) |
| 516 | info->start_soc = soc; |
| 517 | else if (data < soc - 15) |
| 518 | info->start_soc = soc; |
| 519 | else |
| 520 | info->start_soc = data; |
| 521 | dev_dbg(info->dev, "soc_rtc %d, soc_ocv :%d\n", data, soc); |
| 522 | } else { |
| 523 | pm860x_set_bits(info->i2c, PM8607_POWER_UP_LOG, |
| 524 | BAT_WU_LOG, BAT_WU_LOG); |
| 525 | info->start_soc = soc; |
| 526 | } |
| 527 | info->last_capacity = info->start_soc; |
| 528 | dev_dbg(info->dev, "init soc : %d\n", info->last_capacity); |
| 529 | out: |
| 530 | return; |
| 531 | } |
| 532 | |
| 533 | static void set_temp_threshold(struct pm860x_battery_info *info, |
| 534 | int min, int max) |
| 535 | { |
| 536 | int data; |
| 537 | |
| 538 | /* (tmp << 8) / 1800 */ |
| 539 | if (min <= 0) |
| 540 | data = 0; |
| 541 | else |
| 542 | data = (min << 8) / 1800; |
| 543 | pm860x_reg_write(info->i2c, PM8607_GPADC1_HIGHTH, data); |
| 544 | dev_dbg(info->dev, "TEMP_HIGHTH : min: %d, 0x%x\n", min, data); |
| 545 | |
| 546 | if (max <= 0) |
| 547 | data = 0xff; |
| 548 | else |
| 549 | data = (max << 8) / 1800; |
| 550 | pm860x_reg_write(info->i2c, PM8607_GPADC1_LOWTH, data); |
| 551 | dev_dbg(info->dev, "TEMP_LOWTH:max : %d, 0x%x\n", max, data); |
| 552 | } |
| 553 | |
| 554 | static int measure_temp(struct pm860x_battery_info *info, int *data) |
| 555 | { |
| 556 | int ret; |
| 557 | int temp; |
| 558 | int min; |
| 559 | int max; |
| 560 | |
| 561 | if (info->temp_type == PM860X_TEMP_TINT) { |
| 562 | ret = measure_12bit_voltage(info, PM8607_TINT_MEAS1, data); |
| 563 | if (ret) |
| 564 | return ret; |
| 565 | *data = (*data - 884) * 1000 / 3611; |
| 566 | } else { |
| 567 | ret = measure_12bit_voltage(info, PM8607_GPADC1_MEAS1, data); |
| 568 | if (ret) |
| 569 | return ret; |
| 570 | /* meausered Vtbat(mV) / Ibias_current(11uA)*/ |
| 571 | *data = (*data * 1000) / GPBIAS2_GPADC1_UA; |
| 572 | |
| 573 | if (*data > TBAT_NEG_25D) { |
| 574 | temp = -30; /* over cold , suppose -30 roughly */ |
| 575 | max = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; |
| 576 | set_temp_threshold(info, 0, max); |
| 577 | } else if (*data > TBAT_NEG_10D) { |
| 578 | temp = -15; /* -15 degree, code */ |
| 579 | max = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; |
| 580 | set_temp_threshold(info, 0, max); |
| 581 | } else if (*data > TBAT_0D) { |
| 582 | temp = -5; /* -5 degree */ |
| 583 | min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; |
| 584 | max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; |
| 585 | set_temp_threshold(info, min, max); |
| 586 | } else if (*data > TBAT_10D) { |
| 587 | temp = 5; /* in range of (0, 10) */ |
| 588 | min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; |
| 589 | max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; |
| 590 | set_temp_threshold(info, min, max); |
| 591 | } else if (*data > TBAT_20D) { |
| 592 | temp = 15; /* in range of (10, 20) */ |
| 593 | min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; |
| 594 | max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; |
| 595 | set_temp_threshold(info, min, max); |
| 596 | } else if (*data > TBAT_30D) { |
| 597 | temp = 25; /* in range of (20, 30) */ |
| 598 | min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; |
| 599 | max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; |
| 600 | set_temp_threshold(info, min, max); |
| 601 | } else if (*data > TBAT_40D) { |
| 602 | temp = 35; /* in range of (30, 40) */ |
| 603 | min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; |
| 604 | max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; |
| 605 | set_temp_threshold(info, min, max); |
| 606 | } else { |
| 607 | min = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; |
| 608 | set_temp_threshold(info, min, 0); |
| 609 | temp = 45; /* over heat ,suppose 45 roughly */ |
| 610 | } |
| 611 | |
| 612 | dev_dbg(info->dev, "temp_C:%d C,temp_mv:%d mv\n", temp, *data); |
| 613 | *data = temp; |
| 614 | } |
| 615 | return 0; |
| 616 | } |
| 617 | |
| 618 | static int calc_resistor(struct pm860x_battery_info *info) |
| 619 | { |
| 620 | int vbatt_sum1; |
| 621 | int vbatt_sum2; |
| 622 | int chg_current; |
| 623 | int ibatt_sum1; |
| 624 | int ibatt_sum2; |
| 625 | int data; |
| 626 | int ret; |
| 627 | int i; |
| 628 | |
| 629 | ret = measure_current(info, &data); |
| 630 | /* make sure that charging is launched by data > 0 */ |
| 631 | if (ret || data < 0) |
| 632 | goto out; |
| 633 | |
| 634 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); |
| 635 | if (ret) |
| 636 | goto out; |
| 637 | /* calculate resistor only in CC charge mode */ |
| 638 | if (data < VBATT_RESISTOR_MIN || data > VBATT_RESISTOR_MAX) |
| 639 | goto out; |
| 640 | |
| 641 | /* current is saved */ |
| 642 | if (set_charger_current(info, 500, &chg_current)) |
| 643 | goto out; |
| 644 | |
| 645 | /* |
| 646 | * set charge current as 500mA, wait about 500ms till charging |
| 647 | * process is launched and stable with the newer charging current. |
| 648 | */ |
| 649 | msleep(500); |
| 650 | |
| 651 | for (i = 0, vbatt_sum1 = 0, ibatt_sum1 = 0; i < 10; i++) { |
| 652 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); |
| 653 | if (ret) |
| 654 | goto out_meas; |
| 655 | vbatt_sum1 += data; |
| 656 | ret = measure_current(info, &data); |
| 657 | if (ret) |
| 658 | goto out_meas; |
| 659 | |
| 660 | if (data < 0) |
| 661 | ibatt_sum1 = ibatt_sum1 - data; /* discharging */ |
| 662 | else |
| 663 | ibatt_sum1 = ibatt_sum1 + data; /* charging */ |
| 664 | } |
| 665 | |
| 666 | if (set_charger_current(info, 100, &ret)) |
| 667 | goto out_meas; |
| 668 | /* |
| 669 | * set charge current as 100mA, wait about 500ms till charging |
| 670 | * process is launched and stable with the newer charging current. |
| 671 | */ |
| 672 | msleep(500); |
| 673 | |
| 674 | for (i = 0, vbatt_sum2 = 0, ibatt_sum2 = 0; i < 10; i++) { |
| 675 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); |
| 676 | if (ret) |
| 677 | goto out_meas; |
| 678 | vbatt_sum2 += data; |
| 679 | ret = measure_current(info, &data); |
| 680 | if (ret) |
| 681 | goto out_meas; |
| 682 | |
| 683 | if (data < 0) |
| 684 | ibatt_sum2 = ibatt_sum2 - data; /* discharging */ |
| 685 | else |
| 686 | ibatt_sum2 = ibatt_sum2 + data; /* charging */ |
| 687 | } |
| 688 | |
| 689 | /* restore current setting */ |
| 690 | if (set_charger_current(info, chg_current, &ret)) |
| 691 | goto out_meas; |
| 692 | |
| 693 | if ((vbatt_sum1 > vbatt_sum2) && (ibatt_sum1 > ibatt_sum2) && |
| 694 | (ibatt_sum2 > 0)) { |
| 695 | /* calculate resistor in discharging case */ |
| 696 | data = 1000 * (vbatt_sum1 - vbatt_sum2) |
| 697 | / (ibatt_sum1 - ibatt_sum2); |
| 698 | if ((data - info->resistor > 0) && |
| 699 | (data - info->resistor < info->resistor)) |
| 700 | info->resistor = data; |
| 701 | if ((info->resistor - data > 0) && |
| 702 | (info->resistor - data < data)) |
| 703 | info->resistor = data; |
| 704 | } |
| 705 | return 0; |
| 706 | |
| 707 | out_meas: |
| 708 | set_charger_current(info, chg_current, &ret); |
| 709 | out: |
| 710 | return -EINVAL; |
| 711 | } |
| 712 | |
| 713 | static int calc_capacity(struct pm860x_battery_info *info, int *cap) |
| 714 | { |
| 715 | int ret; |
| 716 | int data; |
| 717 | int ibat; |
| 718 | int cap_ocv = 0; |
| 719 | int cap_cc = 0; |
| 720 | |
| 721 | ret = calc_ccnt(info, &ccnt_data); |
| 722 | if (ret) |
| 723 | goto out; |
| 724 | soc: |
| 725 | data = info->max_capacity * info->start_soc / 100; |
| 726 | if (ccnt_data.total_dischg - ccnt_data.total_chg <= data) { |
| 727 | cap_cc = |
| 728 | data + ccnt_data.total_chg - ccnt_data.total_dischg; |
| 729 | } else { |
| 730 | clear_ccnt(info, &ccnt_data); |
| 731 | calc_soc(info, OCV_MODE_ACTIVE, &info->start_soc); |
| 732 | dev_dbg(info->dev, "restart soc = %d !\n", |
| 733 | info->start_soc); |
| 734 | goto soc; |
| 735 | } |
| 736 | |
| 737 | cap_cc = cap_cc * 100 / info->max_capacity; |
| 738 | if (cap_cc < 0) |
| 739 | cap_cc = 0; |
| 740 | else if (cap_cc > 100) |
| 741 | cap_cc = 100; |
| 742 | |
| 743 | dev_dbg(info->dev, "%s, last cap : %d", __func__, |
| 744 | info->last_capacity); |
| 745 | |
| 746 | ret = measure_current(info, &ibat); |
| 747 | if (ret) |
| 748 | goto out; |
| 749 | /* Calculate the capacity when discharging(ibat < 0) */ |
| 750 | if (ibat < 0) { |
| 751 | ret = calc_soc(info, OCV_MODE_ACTIVE, &cap_ocv); |
| 752 | if (ret) |
| 753 | cap_ocv = info->last_capacity; |
| 754 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); |
| 755 | if (ret) |
| 756 | goto out; |
| 757 | if (data <= LOW_BAT_THRESHOLD) { |
| 758 | /* choose the lower capacity value to report |
| 759 | * between vbat and CC when vbat < 3.6v; |
| 760 | * than 3.6v; |
| 761 | */ |
| 762 | *cap = min(cap_ocv, cap_cc); |
| 763 | } else { |
| 764 | /* when detect vbat > 3.6v, but cap_cc < 15,and |
| 765 | * cap_ocv is 10% larger than cap_cc, we can think |
| 766 | * CC have some accumulation error, switch to OCV |
| 767 | * to estimate capacity; |
| 768 | * */ |
| 769 | if (cap_cc < 15 && cap_ocv - cap_cc > 10) |
| 770 | *cap = cap_ocv; |
| 771 | else |
| 772 | *cap = cap_cc; |
| 773 | } |
| 774 | /* when discharging, make sure current capacity |
| 775 | * is lower than last*/ |
| 776 | if (*cap > info->last_capacity) |
| 777 | *cap = info->last_capacity; |
| 778 | } else { |
| 779 | *cap = cap_cc; |
| 780 | } |
| 781 | info->last_capacity = *cap; |
| 782 | |
| 783 | dev_dbg(info->dev, "%s, cap_ocv:%d cap_cc:%d, cap:%d\n", |
| 784 | (ibat < 0) ? "discharging" : "charging", |
| 785 | cap_ocv, cap_cc, *cap); |
| 786 | /* |
| 787 | * store the current capacity to RTC domain register, |
| 788 | * after next power up , it will be restored. |
| 789 | */ |
| 790 | pm860x_set_bits(info->i2c, PM8607_RTC_MISC2, RTC_SOC_5LSB, |
| 791 | (*cap & 0x1F) << 3); |
| 792 | pm860x_set_bits(info->i2c, PM8607_RTC1, RTC_SOC_3MSB, |
| 793 | ((*cap >> 5) & 0x3)); |
| 794 | return 0; |
| 795 | out: |
| 796 | return ret; |
| 797 | } |
| 798 | |
| 799 | static void pm860x_external_power_changed(struct power_supply *psy) |
| 800 | { |
| 801 | struct pm860x_battery_info *info; |
| 802 | |
| 803 | info = container_of(psy, struct pm860x_battery_info, battery); |
| 804 | calc_resistor(info); |
| 805 | } |
| 806 | |
| 807 | static int pm860x_batt_get_prop(struct power_supply *psy, |
| 808 | enum power_supply_property psp, |
| 809 | union power_supply_propval *val) |
| 810 | { |
| 811 | struct pm860x_battery_info *info = dev_get_drvdata(psy->dev->parent); |
| 812 | int data; |
| 813 | int ret; |
| 814 | |
| 815 | switch (psp) { |
| 816 | case POWER_SUPPLY_PROP_PRESENT: |
| 817 | val->intval = info->present; |
| 818 | break; |
| 819 | case POWER_SUPPLY_PROP_CAPACITY: |
| 820 | ret = calc_capacity(info, &data); |
| 821 | if (ret) |
| 822 | return ret; |
| 823 | if (data < 0) |
| 824 | data = 0; |
| 825 | else if (data > 100) |
| 826 | data = 100; |
| 827 | /* return 100 if battery is not attached */ |
| 828 | if (!info->present) |
| 829 | data = 100; |
| 830 | val->intval = data; |
| 831 | break; |
| 832 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
| 833 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
| 834 | break; |
| 835 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| 836 | /* return real vbatt Voltage */ |
| 837 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); |
| 838 | if (ret) |
| 839 | return ret; |
| 840 | val->intval = data * 1000; |
| 841 | break; |
| 842 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: |
| 843 | /* return Open Circuit Voltage (not measured voltage) */ |
| 844 | ret = calc_ocv(info, &data); |
| 845 | if (ret) |
| 846 | return ret; |
| 847 | val->intval = data * 1000; |
| 848 | break; |
| 849 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
| 850 | ret = measure_current(info, &data); |
| 851 | if (ret) |
| 852 | return ret; |
| 853 | val->intval = data; |
| 854 | break; |
| 855 | case POWER_SUPPLY_PROP_TEMP: |
| 856 | if (info->present) { |
| 857 | ret = measure_temp(info, &data); |
| 858 | if (ret) |
| 859 | return ret; |
| 860 | data *= 10; |
| 861 | } else { |
| 862 | /* Fake Temp 25C Without Battery */ |
| 863 | data = 250; |
| 864 | } |
| 865 | val->intval = data; |
| 866 | break; |
| 867 | default: |
| 868 | return -ENODEV; |
| 869 | } |
| 870 | return 0; |
| 871 | } |
| 872 | |
| 873 | static int pm860x_batt_set_prop(struct power_supply *psy, |
| 874 | enum power_supply_property psp, |
| 875 | const union power_supply_propval *val) |
| 876 | { |
| 877 | struct pm860x_battery_info *info = dev_get_drvdata(psy->dev->parent); |
| 878 | |
| 879 | switch (psp) { |
| 880 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
| 881 | clear_ccnt(info, &ccnt_data); |
| 882 | info->start_soc = 100; |
| 883 | dev_dbg(info->dev, "chg done, update soc = %d\n", |
| 884 | info->start_soc); |
| 885 | break; |
| 886 | default: |
| 887 | return -EPERM; |
| 888 | } |
| 889 | |
| 890 | return 0; |
| 891 | } |
| 892 | |
| 893 | |
| 894 | static enum power_supply_property pm860x_batt_props[] = { |
| 895 | POWER_SUPPLY_PROP_PRESENT, |
| 896 | POWER_SUPPLY_PROP_CAPACITY, |
| 897 | POWER_SUPPLY_PROP_TECHNOLOGY, |
| 898 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| 899 | POWER_SUPPLY_PROP_VOLTAGE_AVG, |
| 900 | POWER_SUPPLY_PROP_CURRENT_NOW, |
| 901 | POWER_SUPPLY_PROP_TEMP, |
| 902 | }; |
| 903 | |
| 904 | static __devinit int pm860x_battery_probe(struct platform_device *pdev) |
| 905 | { |
| 906 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
| 907 | struct pm860x_battery_info *info; |
| 908 | struct pm860x_power_pdata *pdata; |
| 909 | int ret; |
| 910 | |
| 911 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
| 912 | if (!info) |
| 913 | return -ENOMEM; |
| 914 | |
| 915 | info->irq_cc = platform_get_irq(pdev, 0); |
| 916 | if (info->irq_cc <= 0) { |
| 917 | dev_err(&pdev->dev, "No IRQ resource!\n"); |
| 918 | ret = -EINVAL; |
| 919 | goto out; |
| 920 | } |
| 921 | |
| 922 | info->irq_batt = platform_get_irq(pdev, 1); |
| 923 | if (info->irq_batt <= 0) { |
| 924 | dev_err(&pdev->dev, "No IRQ resource!\n"); |
| 925 | ret = -EINVAL; |
| 926 | goto out; |
| 927 | } |
| 928 | |
| 929 | info->chip = chip; |
| 930 | info->i2c = |
| 931 | (chip->id == CHIP_PM8607) ? chip->client : chip->companion; |
| 932 | info->dev = &pdev->dev; |
| 933 | info->status = POWER_SUPPLY_STATUS_UNKNOWN; |
| 934 | pdata = pdev->dev.platform_data; |
| 935 | |
| 936 | mutex_init(&info->lock); |
| 937 | platform_set_drvdata(pdev, info); |
| 938 | |
| 939 | pm860x_init_battery(info); |
| 940 | |
| 941 | info->battery.name = "battery-monitor"; |
| 942 | info->battery.type = POWER_SUPPLY_TYPE_BATTERY; |
| 943 | info->battery.properties = pm860x_batt_props; |
| 944 | info->battery.num_properties = ARRAY_SIZE(pm860x_batt_props); |
| 945 | info->battery.get_property = pm860x_batt_get_prop; |
| 946 | info->battery.set_property = pm860x_batt_set_prop; |
| 947 | info->battery.external_power_changed = pm860x_external_power_changed; |
| 948 | |
| 949 | if (pdata && pdata->max_capacity) |
| 950 | info->max_capacity = pdata->max_capacity; |
| 951 | else |
| 952 | info->max_capacity = 1500; /* set default capacity */ |
| 953 | if (pdata && pdata->resistor) |
| 954 | info->resistor = pdata->resistor; |
| 955 | else |
| 956 | info->resistor = 300; /* set default internal resistor */ |
| 957 | |
| 958 | ret = power_supply_register(&pdev->dev, &info->battery); |
| 959 | if (ret) |
| 960 | goto out; |
| 961 | info->battery.dev->parent = &pdev->dev; |
| 962 | |
| 963 | ret = request_threaded_irq(info->irq_cc, NULL, |
| 964 | pm860x_coulomb_handler, IRQF_ONESHOT, |
| 965 | "coulomb", info); |
| 966 | if (ret < 0) { |
| 967 | dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", |
| 968 | info->irq_cc, ret); |
| 969 | goto out_reg; |
| 970 | } |
| 971 | |
| 972 | ret = request_threaded_irq(info->irq_batt, NULL, pm860x_batt_handler, |
| 973 | IRQF_ONESHOT, "battery", info); |
| 974 | if (ret < 0) { |
| 975 | dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", |
| 976 | info->irq_batt, ret); |
| 977 | goto out_coulomb; |
| 978 | } |
| 979 | |
| 980 | |
| 981 | return 0; |
| 982 | |
| 983 | out_coulomb: |
| 984 | free_irq(info->irq_cc, info); |
| 985 | out_reg: |
| 986 | power_supply_unregister(&info->battery); |
| 987 | out: |
| 988 | kfree(info); |
| 989 | return ret; |
| 990 | } |
| 991 | |
| 992 | static int __devexit pm860x_battery_remove(struct platform_device *pdev) |
| 993 | { |
| 994 | struct pm860x_battery_info *info = platform_get_drvdata(pdev); |
| 995 | |
| 996 | power_supply_unregister(&info->battery); |
| 997 | free_irq(info->irq_batt, info); |
| 998 | free_irq(info->irq_cc, info); |
| 999 | kfree(info); |
| 1000 | platform_set_drvdata(pdev, NULL); |
| 1001 | return 0; |
| 1002 | } |
| 1003 | |
| 1004 | #ifdef CONFIG_PM_SLEEP |
| 1005 | static int pm860x_battery_suspend(struct device *dev) |
| 1006 | { |
| 1007 | struct platform_device *pdev = to_platform_device(dev); |
| 1008 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
| 1009 | |
| 1010 | if (device_may_wakeup(dev)) |
| 1011 | chip->wakeup_flag |= 1 << PM8607_IRQ_CC; |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
| 1015 | static int pm860x_battery_resume(struct device *dev) |
| 1016 | { |
| 1017 | struct platform_device *pdev = to_platform_device(dev); |
| 1018 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
| 1019 | |
| 1020 | if (device_may_wakeup(dev)) |
| 1021 | chip->wakeup_flag &= ~(1 << PM8607_IRQ_CC); |
| 1022 | return 0; |
| 1023 | } |
| 1024 | #endif |
| 1025 | |
| 1026 | static SIMPLE_DEV_PM_OPS(pm860x_battery_pm_ops, |
| 1027 | pm860x_battery_suspend, pm860x_battery_resume); |
| 1028 | |
| 1029 | static struct platform_driver pm860x_battery_driver = { |
| 1030 | .driver = { |
| 1031 | .name = "88pm860x-battery", |
| 1032 | .owner = THIS_MODULE, |
| 1033 | .pm = &pm860x_battery_pm_ops, |
| 1034 | }, |
| 1035 | .probe = pm860x_battery_probe, |
| 1036 | .remove = __devexit_p(pm860x_battery_remove), |
| 1037 | }; |
| 1038 | module_platform_driver(pm860x_battery_driver); |
| 1039 | |
| 1040 | MODULE_DESCRIPTION("Marvell 88PM860x Battery driver"); |
| 1041 | MODULE_LICENSE("GPL"); |