Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it> |
| 2 | * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it> |
| 3 | * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc. |
| 4 | * |
Duy Truong | 790f06d | 2013-02-13 16:38:12 -0800 | [diff] [blame] | 5 | * Copyright (c) 2011, The Linux Foundation. All rights reserved. |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 and |
| 9 | * only version 2 as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/param.h> |
| 19 | #include <linux/jiffies.h> |
| 20 | #include <linux/workqueue.h> |
| 21 | #include <linux/delay.h> |
| 22 | #include <linux/platform_device.h> |
| 23 | #include <linux/power_supply.h> |
| 24 | #include <linux/idr.h> |
| 25 | #include <linux/i2c.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <asm/unaligned.h> |
| 28 | #include <linux/time.h> |
| 29 | #include <linux/mfd/pmic8058.h> |
| 30 | #include <linux/regulator/pmic8058-regulator.h> |
| 31 | #include <linux/gpio.h> |
| 32 | #include <linux/regulator/consumer.h> |
| 33 | #include <linux/regulator/machine.h> |
| 34 | #include <linux/err.h> |
| 35 | #include <linux/msm-charger.h> |
| 36 | #include <linux/i2c/bq27520.h> /* use the same platform data as bq27520 */ |
| 37 | |
| 38 | #define DRIVER_VERSION "1.1.0" |
| 39 | /* Bq27541 standard data commands */ |
| 40 | #define BQ27541_REG_CNTL 0x00 |
| 41 | #define BQ27541_REG_AR 0x02 |
| 42 | #define BQ27541_REG_ARTTE 0x04 |
| 43 | #define BQ27541_REG_TEMP 0x06 |
| 44 | #define BQ27541_REG_VOLT 0x08 |
| 45 | #define BQ27541_REG_FLAGS 0x0A |
| 46 | #define BQ27541_REG_NAC 0x0C |
| 47 | #define BQ27541_REG_FAC 0x0e |
| 48 | #define BQ27541_REG_RM 0x10 |
| 49 | #define BQ27541_REG_FCC 0x12 |
| 50 | #define BQ27541_REG_AI 0x14 |
| 51 | #define BQ27541_REG_TTE 0x16 |
| 52 | #define BQ27541_REG_TTF 0x18 |
| 53 | #define BQ27541_REG_SI 0x1a |
| 54 | #define BQ27541_REG_STTE 0x1c |
| 55 | #define BQ27541_REG_MLI 0x1e |
| 56 | #define BQ27541_REG_MLTTE 0x20 |
| 57 | #define BQ27541_REG_AE 0x22 |
| 58 | #define BQ27541_REG_AP 0x24 |
| 59 | #define BQ27541_REG_TTECP 0x26 |
| 60 | #define BQ27541_REG_SOH 0x28 |
| 61 | #define BQ27541_REG_SOC 0x2c |
| 62 | #define BQ27541_REG_NIC 0x2e |
| 63 | #define BQ27541_REG_ICR 0x30 |
| 64 | #define BQ27541_REG_LOGIDX 0x32 |
| 65 | #define BQ27541_REG_LOGBUF 0x34 |
| 66 | |
| 67 | #define BQ27541_FLAG_DSC BIT(0) |
| 68 | #define BQ27541_FLAG_FC BIT(9) |
| 69 | |
| 70 | #define BQ27541_CS_DLOGEN BIT(15) |
| 71 | #define BQ27541_CS_SS BIT(13) |
| 72 | |
| 73 | /* Control subcommands */ |
| 74 | #define BQ27541_SUBCMD_CTNL_STATUS 0x0000 |
| 75 | #define BQ27541_SUBCMD_DEVCIE_TYPE 0x0001 |
| 76 | #define BQ27541_SUBCMD_FW_VER 0x0002 |
| 77 | #define BQ27541_SUBCMD_HW_VER 0x0003 |
| 78 | #define BQ27541_SUBCMD_DF_CSUM 0x0004 |
| 79 | #define BQ27541_SUBCMD_PREV_MACW 0x0007 |
| 80 | #define BQ27541_SUBCMD_CHEM_ID 0x0008 |
| 81 | #define BQ27541_SUBCMD_BD_OFFSET 0x0009 |
| 82 | #define BQ27541_SUBCMD_INT_OFFSET 0x000a |
| 83 | #define BQ27541_SUBCMD_CC_VER 0x000b |
| 84 | #define BQ27541_SUBCMD_OCV 0x000c |
| 85 | #define BQ27541_SUBCMD_BAT_INS 0x000d |
| 86 | #define BQ27541_SUBCMD_BAT_REM 0x000e |
| 87 | #define BQ27541_SUBCMD_SET_HIB 0x0011 |
| 88 | #define BQ27541_SUBCMD_CLR_HIB 0x0012 |
| 89 | #define BQ27541_SUBCMD_SET_SLP 0x0013 |
| 90 | #define BQ27541_SUBCMD_CLR_SLP 0x0014 |
| 91 | #define BQ27541_SUBCMD_FCT_RES 0x0015 |
| 92 | #define BQ27541_SUBCMD_ENABLE_DLOG 0x0018 |
| 93 | #define BQ27541_SUBCMD_DISABLE_DLOG 0x0019 |
| 94 | #define BQ27541_SUBCMD_SEALED 0x0020 |
| 95 | #define BQ27541_SUBCMD_ENABLE_IT 0x0021 |
| 96 | #define BQ27541_SUBCMD_DISABLE_IT 0x0023 |
| 97 | #define BQ27541_SUBCMD_CAL_MODE 0x0040 |
| 98 | #define BQ27541_SUBCMD_RESET 0x0041 |
| 99 | #define ZERO_DEGREE_CELSIUS_IN_TENTH_KELVIN (-2731) |
| 100 | #define BQ27541_INIT_DELAY ((HZ)*1) |
| 101 | |
| 102 | /* If the system has several batteries we need a different name for each |
| 103 | * of them... |
| 104 | */ |
| 105 | static DEFINE_IDR(battery_id); |
| 106 | static DEFINE_MUTEX(battery_mutex); |
| 107 | |
| 108 | struct bq27541_device_info; |
| 109 | struct bq27541_access_methods { |
| 110 | int (*read)(u8 reg, int *rt_value, int b_single, |
| 111 | struct bq27541_device_info *di); |
| 112 | }; |
| 113 | |
| 114 | struct bq27541_device_info { |
| 115 | struct device *dev; |
| 116 | int id; |
| 117 | struct bq27541_access_methods *bus; |
| 118 | struct i2c_client *client; |
| 119 | struct work_struct counter; |
| 120 | /* 300ms delay is needed after bq27541 is powered up |
| 121 | * and before any successful I2C transaction |
| 122 | */ |
| 123 | struct delayed_work hw_config; |
| 124 | }; |
| 125 | |
| 126 | static int coulomb_counter; |
| 127 | static spinlock_t lock; /* protect access to coulomb_counter */ |
| 128 | |
| 129 | static int bq27541_i2c_txsubcmd(u8 reg, unsigned short subcmd, |
| 130 | struct bq27541_device_info *di); |
| 131 | |
| 132 | static int bq27541_read(u8 reg, int *rt_value, int b_single, |
| 133 | struct bq27541_device_info *di) |
| 134 | { |
| 135 | return di->bus->read(reg, rt_value, b_single, di); |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * Return the battery temperature in tenths of degree Celsius |
| 140 | * Or < 0 if something fails. |
| 141 | */ |
| 142 | static int bq27541_battery_temperature(struct bq27541_device_info *di) |
| 143 | { |
| 144 | int ret; |
| 145 | int temp = 0; |
| 146 | |
| 147 | ret = bq27541_read(BQ27541_REG_TEMP, &temp, 0, di); |
| 148 | if (ret) { |
| 149 | dev_err(di->dev, "error reading temperature\n"); |
| 150 | return ret; |
| 151 | } |
| 152 | |
| 153 | return temp + ZERO_DEGREE_CELSIUS_IN_TENTH_KELVIN; |
| 154 | } |
| 155 | |
| 156 | /* |
| 157 | * Return the battery Voltage in milivolts |
| 158 | * Or < 0 if something fails. |
| 159 | */ |
| 160 | static int bq27541_battery_voltage(struct bq27541_device_info *di) |
| 161 | { |
| 162 | int ret; |
| 163 | int volt = 0; |
| 164 | |
| 165 | ret = bq27541_read(BQ27541_REG_VOLT, &volt, 0, di); |
| 166 | if (ret) { |
| 167 | dev_err(di->dev, "error reading voltage\n"); |
| 168 | return ret; |
| 169 | } |
| 170 | |
| 171 | return volt * 1000; |
| 172 | } |
| 173 | |
| 174 | static void bq27541_cntl_cmd(struct bq27541_device_info *di, |
| 175 | int subcmd) |
| 176 | { |
| 177 | bq27541_i2c_txsubcmd(BQ27541_REG_CNTL, subcmd, di); |
| 178 | } |
| 179 | |
| 180 | /* |
| 181 | * i2c specific code |
| 182 | */ |
| 183 | static int bq27541_i2c_txsubcmd(u8 reg, unsigned short subcmd, |
| 184 | struct bq27541_device_info *di) |
| 185 | { |
| 186 | struct i2c_msg msg; |
| 187 | unsigned char data[3]; |
| 188 | int ret; |
| 189 | |
| 190 | if (!di->client) |
| 191 | return -ENODEV; |
| 192 | |
| 193 | memset(data, 0, sizeof(data)); |
| 194 | data[0] = reg; |
| 195 | data[1] = subcmd & 0x00FF; |
| 196 | data[2] = (subcmd & 0xFF00) >> 8; |
| 197 | |
| 198 | msg.addr = di->client->addr; |
| 199 | msg.flags = 0; |
| 200 | msg.len = 3; |
| 201 | msg.buf = data; |
| 202 | |
| 203 | ret = i2c_transfer(di->client->adapter, &msg, 1); |
| 204 | if (ret < 0) |
| 205 | return -EIO; |
| 206 | |
| 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | static int bq27541_chip_config(struct bq27541_device_info *di) |
| 211 | { |
| 212 | int flags = 0, ret = 0; |
| 213 | |
| 214 | bq27541_cntl_cmd(di, BQ27541_SUBCMD_CTNL_STATUS); |
| 215 | udelay(66); |
| 216 | ret = bq27541_read(BQ27541_REG_CNTL, &flags, 0, di); |
| 217 | if (ret < 0) { |
| 218 | dev_err(di->dev, "error reading register %02x ret = %d\n", |
| 219 | BQ27541_REG_CNTL, ret); |
| 220 | return ret; |
| 221 | } |
| 222 | udelay(66); |
| 223 | |
| 224 | bq27541_cntl_cmd(di, BQ27541_SUBCMD_ENABLE_IT); |
| 225 | udelay(66); |
| 226 | |
| 227 | if (!(flags & BQ27541_CS_DLOGEN)) { |
| 228 | bq27541_cntl_cmd(di, BQ27541_SUBCMD_ENABLE_DLOG); |
| 229 | udelay(66); |
| 230 | } |
| 231 | |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | static void bq27541_coulomb_counter_work(struct work_struct *work) |
| 236 | { |
| 237 | int value = 0, temp = 0, index = 0, ret = 0; |
| 238 | struct bq27541_device_info *di; |
| 239 | unsigned long flags; |
| 240 | int count = 0; |
| 241 | |
| 242 | di = container_of(work, struct bq27541_device_info, counter); |
| 243 | |
| 244 | /* retrieve 30 values from FIFO of coulomb data logging buffer |
| 245 | * and average over time |
| 246 | */ |
| 247 | do { |
| 248 | ret = bq27541_read(BQ27541_REG_LOGBUF, &temp, 0, di); |
| 249 | if (ret < 0) |
| 250 | break; |
| 251 | if (temp != 0x7FFF) { |
| 252 | ++count; |
| 253 | value += temp; |
| 254 | } |
| 255 | /* delay 66uS, waiting time between continuous reading |
| 256 | * results |
| 257 | */ |
| 258 | udelay(66); |
| 259 | ret = bq27541_read(BQ27541_REG_LOGIDX, &index, 0, di); |
| 260 | if (ret < 0) |
| 261 | break; |
| 262 | udelay(66); |
| 263 | } while (index != 0 || temp != 0x7FFF); |
| 264 | |
| 265 | if (ret < 0) { |
| 266 | dev_err(di->dev, "Error reading datalog register\n"); |
| 267 | return; |
| 268 | } |
| 269 | |
| 270 | if (count) { |
| 271 | spin_lock_irqsave(&lock, flags); |
| 272 | coulomb_counter = value/count; |
| 273 | spin_unlock_irqrestore(&lock, flags); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | struct bq27541_device_info *bq27541_di; |
| 278 | |
| 279 | static int bq27541_get_battery_mvolts(void) |
| 280 | { |
| 281 | return bq27541_battery_voltage(bq27541_di); |
| 282 | } |
| 283 | |
| 284 | static int bq27541_get_battery_temperature(void) |
| 285 | { |
| 286 | return bq27541_battery_temperature(bq27541_di); |
| 287 | } |
| 288 | static int bq27541_is_battery_present(void) |
| 289 | { |
| 290 | return 1; |
| 291 | } |
| 292 | static int bq27541_is_battery_temp_within_range(void) |
| 293 | { |
| 294 | return 1; |
| 295 | } |
| 296 | static int bq27541_is_battery_id_valid(void) |
| 297 | { |
| 298 | return 1; |
| 299 | } |
| 300 | |
| 301 | static struct msm_battery_gauge bq27541_batt_gauge = { |
| 302 | .get_battery_mvolts = bq27541_get_battery_mvolts, |
| 303 | .get_battery_temperature = bq27541_get_battery_temperature, |
| 304 | .is_battery_present = bq27541_is_battery_present, |
| 305 | .is_battery_temp_within_range = bq27541_is_battery_temp_within_range, |
| 306 | .is_battery_id_valid = bq27541_is_battery_id_valid, |
| 307 | }; |
| 308 | static void bq27541_hw_config(struct work_struct *work) |
| 309 | { |
| 310 | int ret = 0, flags = 0, type = 0, fw_ver = 0; |
| 311 | struct bq27541_device_info *di; |
| 312 | |
| 313 | di = container_of(work, struct bq27541_device_info, hw_config.work); |
| 314 | ret = bq27541_chip_config(di); |
| 315 | if (ret) { |
| 316 | dev_err(di->dev, "Failed to config Bq27541\n"); |
| 317 | return; |
| 318 | } |
| 319 | msm_battery_gauge_register(&bq27541_batt_gauge); |
| 320 | |
| 321 | bq27541_cntl_cmd(di, BQ27541_SUBCMD_CTNL_STATUS); |
| 322 | udelay(66); |
| 323 | bq27541_read(BQ27541_REG_CNTL, &flags, 0, di); |
| 324 | bq27541_cntl_cmd(di, BQ27541_SUBCMD_DEVCIE_TYPE); |
| 325 | udelay(66); |
| 326 | bq27541_read(BQ27541_REG_CNTL, &type, 0, di); |
| 327 | bq27541_cntl_cmd(di, BQ27541_SUBCMD_FW_VER); |
| 328 | udelay(66); |
| 329 | bq27541_read(BQ27541_REG_CNTL, &fw_ver, 0, di); |
| 330 | |
| 331 | dev_info(di->dev, "DEVICE_TYPE is 0x%02X, FIRMWARE_VERSION is 0x%02X\n", |
| 332 | type, fw_ver); |
| 333 | dev_info(di->dev, "Complete bq27541 configuration 0x%02X\n", flags); |
| 334 | } |
| 335 | |
| 336 | static int bq27541_read_i2c(u8 reg, int *rt_value, int b_single, |
| 337 | struct bq27541_device_info *di) |
| 338 | { |
| 339 | struct i2c_client *client = di->client; |
| 340 | struct i2c_msg msg[1]; |
| 341 | unsigned char data[2]; |
| 342 | int err; |
| 343 | |
| 344 | if (!client->adapter) |
| 345 | return -ENODEV; |
| 346 | |
| 347 | msg->addr = client->addr; |
| 348 | msg->flags = 0; |
| 349 | msg->len = 1; |
| 350 | msg->buf = data; |
| 351 | |
| 352 | data[0] = reg; |
| 353 | err = i2c_transfer(client->adapter, msg, 1); |
| 354 | |
| 355 | if (err >= 0) { |
| 356 | if (!b_single) |
| 357 | msg->len = 2; |
| 358 | else |
| 359 | msg->len = 1; |
| 360 | |
| 361 | msg->flags = I2C_M_RD; |
| 362 | err = i2c_transfer(client->adapter, msg, 1); |
| 363 | if (err >= 0) { |
| 364 | if (!b_single) |
| 365 | *rt_value = get_unaligned_le16(data); |
| 366 | else |
| 367 | *rt_value = data[0]; |
| 368 | |
| 369 | return 0; |
| 370 | } |
| 371 | } |
| 372 | return err; |
| 373 | } |
| 374 | |
| 375 | #ifdef CONFIG_BQ27541_TEST_ENABLE |
| 376 | static int reg; |
| 377 | static int subcmd; |
| 378 | static ssize_t bq27541_read_stdcmd(struct device *dev, |
| 379 | struct device_attribute *attr, char *buf) |
| 380 | { |
| 381 | int ret; |
| 382 | int temp = 0; |
| 383 | struct platform_device *client; |
| 384 | struct bq27541_device_info *di; |
| 385 | |
| 386 | client = to_platform_device(dev); |
| 387 | di = platform_get_drvdata(client); |
| 388 | |
| 389 | if (reg <= BQ27541_REG_ICR && reg > 0x00) { |
| 390 | ret = bq27541_read(reg, &temp, 0, di); |
| 391 | if (ret) |
| 392 | ret = snprintf(buf, PAGE_SIZE, "Read Error!\n"); |
| 393 | else |
| 394 | ret = snprintf(buf, PAGE_SIZE, "0x%02x\n", temp); |
| 395 | } else |
| 396 | ret = snprintf(buf, PAGE_SIZE, "Register Error!\n"); |
| 397 | |
| 398 | return ret; |
| 399 | } |
| 400 | |
| 401 | static ssize_t bq27541_write_stdcmd(struct device *dev, |
| 402 | struct device_attribute *attr, const char *buf, size_t count) |
| 403 | { |
| 404 | ssize_t ret = strnlen(buf, PAGE_SIZE); |
| 405 | int cmd; |
| 406 | |
| 407 | sscanf(buf, "%x", &cmd); |
| 408 | reg = cmd; |
| 409 | return ret; |
| 410 | } |
| 411 | |
| 412 | static ssize_t bq27541_read_subcmd(struct device *dev, |
| 413 | struct device_attribute *attr, char *buf) |
| 414 | { |
| 415 | int ret; |
| 416 | int temp = 0; |
| 417 | struct platform_device *client; |
| 418 | struct bq27541_device_info *di; |
| 419 | |
| 420 | client = to_platform_device(dev); |
| 421 | di = platform_get_drvdata(client); |
| 422 | |
| 423 | if (subcmd == BQ27541_SUBCMD_DEVCIE_TYPE || |
| 424 | subcmd == BQ27541_SUBCMD_FW_VER || |
| 425 | subcmd == BQ27541_SUBCMD_HW_VER || |
| 426 | subcmd == BQ27541_SUBCMD_CHEM_ID) { |
| 427 | |
| 428 | bq27541_cntl_cmd(di, subcmd); /* Retrieve Chip status */ |
| 429 | udelay(66); |
| 430 | ret = bq27541_read(BQ27541_REG_CNTL, &temp, 0, di); |
| 431 | |
| 432 | if (ret) |
| 433 | ret = snprintf(buf, PAGE_SIZE, "Read Error!\n"); |
| 434 | else |
| 435 | ret = snprintf(buf, PAGE_SIZE, "0x%02x\n", temp); |
| 436 | } else |
| 437 | ret = snprintf(buf, PAGE_SIZE, "Register Error!\n"); |
| 438 | |
| 439 | return ret; |
| 440 | } |
| 441 | |
| 442 | static ssize_t bq27541_write_subcmd(struct device *dev, |
| 443 | struct device_attribute *attr, const char *buf, size_t count) |
| 444 | { |
| 445 | ssize_t ret = strnlen(buf, PAGE_SIZE); |
| 446 | int cmd; |
| 447 | |
| 448 | sscanf(buf, "%x", &cmd); |
| 449 | subcmd = cmd; |
| 450 | return ret; |
| 451 | } |
| 452 | |
| 453 | static DEVICE_ATTR(std_cmd, S_IRUGO|S_IWUGO, bq27541_read_stdcmd, |
| 454 | bq27541_write_stdcmd); |
| 455 | static DEVICE_ATTR(sub_cmd, S_IRUGO|S_IWUGO, bq27541_read_subcmd, |
| 456 | bq27541_write_subcmd); |
| 457 | static struct attribute *fs_attrs[] = { |
| 458 | &dev_attr_std_cmd.attr, |
| 459 | &dev_attr_sub_cmd.attr, |
| 460 | NULL, |
| 461 | }; |
| 462 | static struct attribute_group fs_attr_group = { |
| 463 | .attrs = fs_attrs, |
| 464 | }; |
| 465 | |
| 466 | static struct platform_device this_device = { |
| 467 | .name = "bq27541-test", |
| 468 | .id = -1, |
| 469 | .dev.platform_data = NULL, |
| 470 | }; |
| 471 | #endif |
| 472 | |
| 473 | static int bq27541_battery_probe(struct i2c_client *client, |
| 474 | const struct i2c_device_id *id) |
| 475 | { |
| 476 | char *name; |
| 477 | struct bq27541_device_info *di; |
| 478 | struct bq27541_access_methods *bus; |
| 479 | int num; |
| 480 | int retval = 0; |
| 481 | |
| 482 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) |
| 483 | return -ENODEV; |
| 484 | |
| 485 | /* Get new ID for the new battery device */ |
| 486 | retval = idr_pre_get(&battery_id, GFP_KERNEL); |
| 487 | if (retval == 0) |
| 488 | return -ENOMEM; |
| 489 | mutex_lock(&battery_mutex); |
| 490 | retval = idr_get_new(&battery_id, client, &num); |
| 491 | mutex_unlock(&battery_mutex); |
| 492 | if (retval < 0) |
| 493 | return retval; |
| 494 | |
| 495 | name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num); |
| 496 | if (!name) { |
| 497 | dev_err(&client->dev, "failed to allocate device name\n"); |
| 498 | retval = -ENOMEM; |
| 499 | goto batt_failed_1; |
| 500 | } |
| 501 | |
| 502 | di = kzalloc(sizeof(*di), GFP_KERNEL); |
| 503 | if (!di) { |
| 504 | dev_err(&client->dev, "failed to allocate device info data\n"); |
| 505 | retval = -ENOMEM; |
| 506 | goto batt_failed_2; |
| 507 | } |
| 508 | di->id = num; |
| 509 | |
| 510 | bus = kzalloc(sizeof(*bus), GFP_KERNEL); |
| 511 | if (!bus) { |
| 512 | dev_err(&client->dev, "failed to allocate access method " |
| 513 | "data\n"); |
| 514 | retval = -ENOMEM; |
| 515 | goto batt_failed_3; |
| 516 | } |
| 517 | |
| 518 | i2c_set_clientdata(client, di); |
| 519 | di->dev = &client->dev; |
| 520 | bus->read = &bq27541_read_i2c; |
| 521 | di->bus = bus; |
| 522 | di->client = client; |
| 523 | |
| 524 | #ifdef CONFIG_BQ27541_TEST_ENABLE |
| 525 | platform_set_drvdata(&this_device, di); |
| 526 | retval = platform_device_register(&this_device); |
| 527 | if (!retval) { |
| 528 | retval = sysfs_create_group(&this_device.dev.kobj, |
| 529 | &fs_attr_group); |
| 530 | if (retval) |
| 531 | goto batt_failed_4; |
| 532 | } else |
| 533 | goto batt_failed_4; |
| 534 | #endif |
| 535 | |
| 536 | if (retval) { |
| 537 | dev_err(&client->dev, "failed to setup bq27541\n"); |
| 538 | goto batt_failed_4; |
| 539 | } |
| 540 | |
| 541 | if (retval) { |
| 542 | dev_err(&client->dev, "failed to powerup bq27541\n"); |
| 543 | goto batt_failed_4; |
| 544 | } |
| 545 | |
| 546 | spin_lock_init(&lock); |
| 547 | |
| 548 | bq27541_di = di; |
| 549 | INIT_WORK(&di->counter, bq27541_coulomb_counter_work); |
| 550 | INIT_DELAYED_WORK(&di->hw_config, bq27541_hw_config); |
| 551 | schedule_delayed_work(&di->hw_config, BQ27541_INIT_DELAY); |
| 552 | return 0; |
| 553 | |
| 554 | batt_failed_4: |
| 555 | kfree(bus); |
| 556 | batt_failed_3: |
| 557 | kfree(di); |
| 558 | batt_failed_2: |
| 559 | kfree(name); |
| 560 | batt_failed_1: |
| 561 | mutex_lock(&battery_mutex); |
| 562 | idr_remove(&battery_id, num); |
| 563 | mutex_unlock(&battery_mutex); |
| 564 | |
| 565 | return retval; |
| 566 | } |
| 567 | |
| 568 | static int bq27541_battery_remove(struct i2c_client *client) |
| 569 | { |
| 570 | struct bq27541_device_info *di = i2c_get_clientdata(client); |
| 571 | |
| 572 | msm_battery_gauge_unregister(&bq27541_batt_gauge); |
| 573 | bq27541_cntl_cmd(di, BQ27541_SUBCMD_DISABLE_DLOG); |
| 574 | udelay(66); |
| 575 | bq27541_cntl_cmd(di, BQ27541_SUBCMD_DISABLE_IT); |
| 576 | cancel_delayed_work_sync(&di->hw_config); |
| 577 | |
| 578 | kfree(di->bus); |
| 579 | |
| 580 | mutex_lock(&battery_mutex); |
| 581 | idr_remove(&battery_id, di->id); |
| 582 | mutex_unlock(&battery_mutex); |
| 583 | |
| 584 | kfree(di); |
| 585 | return 0; |
| 586 | } |
| 587 | |
| 588 | static const struct i2c_device_id bq27541_id[] = { |
| 589 | { "bq27541", 1 }, |
| 590 | {}, |
| 591 | }; |
| 592 | MODULE_DEVICE_TABLE(i2c, BQ27541_id); |
| 593 | |
| 594 | static struct i2c_driver bq27541_battery_driver = { |
| 595 | .driver = { |
| 596 | .name = "bq27541-battery", |
| 597 | }, |
| 598 | .probe = bq27541_battery_probe, |
| 599 | .remove = bq27541_battery_remove, |
| 600 | .id_table = bq27541_id, |
| 601 | }; |
| 602 | |
| 603 | static int __init bq27541_battery_init(void) |
| 604 | { |
| 605 | int ret; |
| 606 | |
| 607 | ret = i2c_add_driver(&bq27541_battery_driver); |
| 608 | if (ret) |
| 609 | printk(KERN_ERR "Unable to register BQ27541 driver\n"); |
| 610 | |
| 611 | return ret; |
| 612 | } |
| 613 | module_init(bq27541_battery_init); |
| 614 | |
| 615 | static void __exit bq27541_battery_exit(void) |
| 616 | { |
| 617 | i2c_del_driver(&bq27541_battery_driver); |
| 618 | } |
| 619 | module_exit(bq27541_battery_exit); |
| 620 | |
| 621 | MODULE_LICENSE("GPL v2"); |
| 622 | MODULE_AUTHOR("Qualcomm Innovation Center, Inc."); |
| 623 | MODULE_DESCRIPTION("BQ27541 battery monitor driver"); |