Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Battery charger driver for TI BQ24735 |
| 3 | * |
| 4 | * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. |
| 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 as published by |
| 8 | * the Free Software Foundation; |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | * more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/err.h> |
| 21 | #include <linux/gpio.h> |
| 22 | #include <linux/i2c.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/of.h> |
Paul Kocialkowski | c65a8b5 | 2016-09-03 00:09:53 +0200 | [diff] [blame] | 28 | #include <linux/gpio/consumer.h> |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 29 | #include <linux/power_supply.h> |
| 30 | #include <linux/slab.h> |
| 31 | |
| 32 | #include <linux/power/bq24735-charger.h> |
| 33 | |
| 34 | #define BQ24735_CHG_OPT 0x12 |
| 35 | #define BQ24735_CHG_OPT_CHARGE_DISABLE (1 << 0) |
| 36 | #define BQ24735_CHG_OPT_AC_PRESENT (1 << 4) |
| 37 | #define BQ24735_CHARGE_CURRENT 0x14 |
| 38 | #define BQ24735_CHARGE_CURRENT_MASK 0x1fc0 |
| 39 | #define BQ24735_CHARGE_VOLTAGE 0x15 |
| 40 | #define BQ24735_CHARGE_VOLTAGE_MASK 0x7ff0 |
| 41 | #define BQ24735_INPUT_CURRENT 0x3f |
| 42 | #define BQ24735_INPUT_CURRENT_MASK 0x1f80 |
| 43 | #define BQ24735_MANUFACTURER_ID 0xfe |
| 44 | #define BQ24735_DEVICE_ID 0xff |
| 45 | |
| 46 | struct bq24735 { |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 47 | struct power_supply *charger; |
| 48 | struct power_supply_desc charger_desc; |
| 49 | struct i2c_client *client; |
| 50 | struct bq24735_platform *pdata; |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 51 | struct mutex lock; |
Paul Kocialkowski | c65a8b5 | 2016-09-03 00:09:53 +0200 | [diff] [blame] | 52 | struct gpio_desc *status_gpio; |
Peter Rosin | bf383fe | 2016-12-15 10:28:46 +0100 | [diff] [blame] | 53 | struct delayed_work poll; |
| 54 | u32 poll_interval; |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 55 | bool charging; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 56 | }; |
| 57 | |
| 58 | static inline struct bq24735 *to_bq24735(struct power_supply *psy) |
| 59 | { |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 60 | return power_supply_get_drvdata(psy); |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | static enum power_supply_property bq24735_charger_properties[] = { |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 64 | POWER_SUPPLY_PROP_STATUS, |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 65 | POWER_SUPPLY_PROP_ONLINE, |
| 66 | }; |
| 67 | |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 68 | static int bq24735_charger_property_is_writeable(struct power_supply *psy, |
| 69 | enum power_supply_property psp) |
| 70 | { |
| 71 | switch (psp) { |
| 72 | case POWER_SUPPLY_PROP_STATUS: |
| 73 | return 1; |
| 74 | default: |
| 75 | break; |
| 76 | } |
| 77 | |
| 78 | return 0; |
| 79 | } |
| 80 | |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 81 | static inline int bq24735_write_word(struct i2c_client *client, u8 reg, |
| 82 | u16 value) |
| 83 | { |
Phil Reid | 48f680c | 2017-06-15 21:59:30 +0800 | [diff] [blame] | 84 | return i2c_smbus_write_word_data(client, reg, value); |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | static inline int bq24735_read_word(struct i2c_client *client, u8 reg) |
| 88 | { |
Phil Reid | 48f680c | 2017-06-15 21:59:30 +0800 | [diff] [blame] | 89 | return i2c_smbus_read_word_data(client, reg); |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | static int bq24735_update_word(struct i2c_client *client, u8 reg, |
| 93 | u16 mask, u16 value) |
| 94 | { |
| 95 | unsigned int tmp; |
| 96 | int ret; |
| 97 | |
| 98 | ret = bq24735_read_word(client, reg); |
| 99 | if (ret < 0) |
| 100 | return ret; |
| 101 | |
| 102 | tmp = ret & ~mask; |
| 103 | tmp |= value & mask; |
| 104 | |
| 105 | return bq24735_write_word(client, reg, tmp); |
| 106 | } |
| 107 | |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 108 | static int bq24735_config_charger(struct bq24735 *charger) |
| 109 | { |
| 110 | struct bq24735_platform *pdata = charger->pdata; |
| 111 | int ret; |
| 112 | u16 value; |
| 113 | |
Jonathan Tinkham | 64024ac | 2016-02-02 23:03:45 -0700 | [diff] [blame] | 114 | if (pdata->ext_control) |
| 115 | return 0; |
| 116 | |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 117 | if (pdata->charge_current) { |
| 118 | value = pdata->charge_current & BQ24735_CHARGE_CURRENT_MASK; |
| 119 | |
| 120 | ret = bq24735_write_word(charger->client, |
| 121 | BQ24735_CHARGE_CURRENT, value); |
| 122 | if (ret < 0) { |
| 123 | dev_err(&charger->client->dev, |
| 124 | "Failed to write charger current : %d\n", |
| 125 | ret); |
| 126 | return ret; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | if (pdata->charge_voltage) { |
| 131 | value = pdata->charge_voltage & BQ24735_CHARGE_VOLTAGE_MASK; |
| 132 | |
| 133 | ret = bq24735_write_word(charger->client, |
| 134 | BQ24735_CHARGE_VOLTAGE, value); |
| 135 | if (ret < 0) { |
| 136 | dev_err(&charger->client->dev, |
| 137 | "Failed to write charger voltage : %d\n", |
| 138 | ret); |
| 139 | return ret; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | if (pdata->input_current) { |
| 144 | value = pdata->input_current & BQ24735_INPUT_CURRENT_MASK; |
| 145 | |
| 146 | ret = bq24735_write_word(charger->client, |
| 147 | BQ24735_INPUT_CURRENT, value); |
| 148 | if (ret < 0) { |
| 149 | dev_err(&charger->client->dev, |
| 150 | "Failed to write input current : %d\n", |
| 151 | ret); |
| 152 | return ret; |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | return 0; |
| 157 | } |
| 158 | |
Peter Rosin | 2e66585 | 2016-12-20 12:33:00 +0100 | [diff] [blame] | 159 | static inline int bq24735_enable_charging(struct bq24735 *charger) |
| 160 | { |
Peter Rosin | a07bea3 | 2016-12-20 12:33:01 +0100 | [diff] [blame] | 161 | int ret; |
| 162 | |
Peter Rosin | 2e66585 | 2016-12-20 12:33:00 +0100 | [diff] [blame] | 163 | if (charger->pdata->ext_control) |
| 164 | return 0; |
| 165 | |
Peter Rosin | a07bea3 | 2016-12-20 12:33:01 +0100 | [diff] [blame] | 166 | ret = bq24735_config_charger(charger); |
| 167 | if (ret) |
| 168 | return ret; |
| 169 | |
Peter Rosin | 2e66585 | 2016-12-20 12:33:00 +0100 | [diff] [blame] | 170 | return bq24735_update_word(charger->client, BQ24735_CHG_OPT, |
| 171 | BQ24735_CHG_OPT_CHARGE_DISABLE, 0); |
| 172 | } |
| 173 | |
| 174 | static inline int bq24735_disable_charging(struct bq24735 *charger) |
| 175 | { |
| 176 | if (charger->pdata->ext_control) |
| 177 | return 0; |
| 178 | |
| 179 | return bq24735_update_word(charger->client, BQ24735_CHG_OPT, |
| 180 | BQ24735_CHG_OPT_CHARGE_DISABLE, |
| 181 | BQ24735_CHG_OPT_CHARGE_DISABLE); |
| 182 | } |
| 183 | |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 184 | static bool bq24735_charger_is_present(struct bq24735 *charger) |
| 185 | { |
Paul Kocialkowski | c65a8b5 | 2016-09-03 00:09:53 +0200 | [diff] [blame] | 186 | if (charger->status_gpio) { |
| 187 | return !gpiod_get_value_cansleep(charger->status_gpio); |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 188 | } else { |
| 189 | int ac = 0; |
| 190 | |
| 191 | ac = bq24735_read_word(charger->client, BQ24735_CHG_OPT); |
| 192 | if (ac < 0) { |
Peter Rosin | de4fb05 | 2016-12-21 22:29:53 +0100 | [diff] [blame] | 193 | dev_dbg(&charger->client->dev, |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 194 | "Failed to read charger options : %d\n", |
| 195 | ac); |
| 196 | return false; |
| 197 | } |
| 198 | return (ac & BQ24735_CHG_OPT_AC_PRESENT) ? true : false; |
| 199 | } |
| 200 | |
| 201 | return false; |
| 202 | } |
| 203 | |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 204 | static int bq24735_charger_is_charging(struct bq24735 *charger) |
| 205 | { |
Paul Kocialkowski | ae0f74b | 2016-08-28 19:34:46 +0200 | [diff] [blame] | 206 | int ret; |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 207 | |
Paul Kocialkowski | ae0f74b | 2016-08-28 19:34:46 +0200 | [diff] [blame] | 208 | if (!bq24735_charger_is_present(charger)) |
| 209 | return 0; |
| 210 | |
| 211 | ret = bq24735_read_word(charger->client, BQ24735_CHG_OPT); |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 212 | if (ret < 0) |
| 213 | return ret; |
| 214 | |
| 215 | return !(ret & BQ24735_CHG_OPT_CHARGE_DISABLE); |
| 216 | } |
| 217 | |
Peter Rosin | bf383fe | 2016-12-15 10:28:46 +0100 | [diff] [blame] | 218 | static void bq24735_update(struct bq24735 *charger) |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 219 | { |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 220 | mutex_lock(&charger->lock); |
| 221 | |
| 222 | if (charger->charging && bq24735_charger_is_present(charger)) |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 223 | bq24735_enable_charging(charger); |
| 224 | else |
| 225 | bq24735_disable_charging(charger); |
| 226 | |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 227 | mutex_unlock(&charger->lock); |
| 228 | |
Peter Rosin | bf383fe | 2016-12-15 10:28:46 +0100 | [diff] [blame] | 229 | power_supply_changed(charger->charger); |
| 230 | } |
| 231 | |
| 232 | static irqreturn_t bq24735_charger_isr(int irq, void *devid) |
| 233 | { |
| 234 | struct power_supply *psy = devid; |
| 235 | struct bq24735 *charger = to_bq24735(psy); |
| 236 | |
| 237 | bq24735_update(charger); |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 238 | |
| 239 | return IRQ_HANDLED; |
| 240 | } |
| 241 | |
Peter Rosin | bf383fe | 2016-12-15 10:28:46 +0100 | [diff] [blame] | 242 | static void bq24735_poll(struct work_struct *work) |
| 243 | { |
| 244 | struct bq24735 *charger = container_of(work, struct bq24735, poll.work); |
| 245 | |
| 246 | bq24735_update(charger); |
| 247 | |
| 248 | schedule_delayed_work(&charger->poll, |
| 249 | msecs_to_jiffies(charger->poll_interval)); |
| 250 | } |
| 251 | |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 252 | static int bq24735_charger_get_property(struct power_supply *psy, |
| 253 | enum power_supply_property psp, |
| 254 | union power_supply_propval *val) |
| 255 | { |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 256 | struct bq24735 *charger = to_bq24735(psy); |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 257 | |
| 258 | switch (psp) { |
| 259 | case POWER_SUPPLY_PROP_ONLINE: |
| 260 | val->intval = bq24735_charger_is_present(charger) ? 1 : 0; |
| 261 | break; |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 262 | case POWER_SUPPLY_PROP_STATUS: |
| 263 | switch (bq24735_charger_is_charging(charger)) { |
| 264 | case 1: |
| 265 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
| 266 | break; |
| 267 | case 0: |
| 268 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
| 269 | break; |
| 270 | default: |
| 271 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
| 272 | break; |
| 273 | } |
| 274 | break; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 275 | default: |
| 276 | return -EINVAL; |
| 277 | } |
| 278 | |
| 279 | return 0; |
| 280 | } |
| 281 | |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 282 | static int bq24735_charger_set_property(struct power_supply *psy, |
| 283 | enum power_supply_property psp, |
| 284 | const union power_supply_propval *val) |
| 285 | { |
| 286 | struct bq24735 *charger = to_bq24735(psy); |
| 287 | int ret; |
| 288 | |
| 289 | switch (psp) { |
| 290 | case POWER_SUPPLY_PROP_STATUS: |
| 291 | switch (val->intval) { |
| 292 | case POWER_SUPPLY_STATUS_CHARGING: |
| 293 | mutex_lock(&charger->lock); |
| 294 | charger->charging = true; |
| 295 | ret = bq24735_enable_charging(charger); |
| 296 | mutex_unlock(&charger->lock); |
| 297 | if (ret) |
| 298 | return ret; |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 299 | break; |
| 300 | case POWER_SUPPLY_STATUS_DISCHARGING: |
| 301 | case POWER_SUPPLY_STATUS_NOT_CHARGING: |
| 302 | mutex_lock(&charger->lock); |
| 303 | charger->charging = false; |
| 304 | ret = bq24735_disable_charging(charger); |
| 305 | mutex_unlock(&charger->lock); |
| 306 | if (ret) |
| 307 | return ret; |
| 308 | break; |
| 309 | default: |
| 310 | return -EINVAL; |
| 311 | } |
| 312 | power_supply_changed(psy); |
| 313 | break; |
| 314 | default: |
| 315 | return -EPERM; |
| 316 | } |
| 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 321 | static struct bq24735_platform *bq24735_parse_dt_data(struct i2c_client *client) |
| 322 | { |
| 323 | struct bq24735_platform *pdata; |
| 324 | struct device_node *np = client->dev.of_node; |
| 325 | u32 val; |
| 326 | int ret; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 327 | |
| 328 | pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); |
| 329 | if (!pdata) { |
| 330 | dev_err(&client->dev, |
| 331 | "Memory alloc for bq24735 pdata failed\n"); |
| 332 | return NULL; |
| 333 | } |
| 334 | |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 335 | ret = of_property_read_u32(np, "ti,charge-current", &val); |
| 336 | if (!ret) |
| 337 | pdata->charge_current = val; |
| 338 | |
| 339 | ret = of_property_read_u32(np, "ti,charge-voltage", &val); |
| 340 | if (!ret) |
| 341 | pdata->charge_voltage = val; |
| 342 | |
| 343 | ret = of_property_read_u32(np, "ti,input-current", &val); |
| 344 | if (!ret) |
| 345 | pdata->input_current = val; |
| 346 | |
Jonathan Tinkham | 64024ac | 2016-02-02 23:03:45 -0700 | [diff] [blame] | 347 | pdata->ext_control = of_property_read_bool(np, "ti,external-control"); |
| 348 | |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 349 | return pdata; |
| 350 | } |
| 351 | |
| 352 | static int bq24735_charger_probe(struct i2c_client *client, |
| 353 | const struct i2c_device_id *id) |
| 354 | { |
| 355 | int ret; |
| 356 | struct bq24735 *charger; |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 357 | struct power_supply_desc *supply_desc; |
Krzysztof Kozlowski | 2dc9215 | 2015-03-12 08:44:02 +0100 | [diff] [blame] | 358 | struct power_supply_config psy_cfg = {}; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 359 | char *name; |
| 360 | |
| 361 | charger = devm_kzalloc(&client->dev, sizeof(*charger), GFP_KERNEL); |
| 362 | if (!charger) |
| 363 | return -ENOMEM; |
| 364 | |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 365 | mutex_init(&charger->lock); |
| 366 | charger->charging = true; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 367 | charger->pdata = client->dev.platform_data; |
| 368 | |
| 369 | if (IS_ENABLED(CONFIG_OF) && !charger->pdata && client->dev.of_node) |
| 370 | charger->pdata = bq24735_parse_dt_data(client); |
| 371 | |
| 372 | if (!charger->pdata) { |
| 373 | dev_err(&client->dev, "no platform data provided\n"); |
| 374 | return -EINVAL; |
| 375 | } |
| 376 | |
| 377 | name = (char *)charger->pdata->name; |
| 378 | if (!name) { |
Vaishali Thakkar | 71a5a50 | 2015-07-25 09:23:16 +0530 | [diff] [blame] | 379 | name = devm_kasprintf(&client->dev, GFP_KERNEL, |
| 380 | "bq24735@%s", |
| 381 | dev_name(&client->dev)); |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 382 | if (!name) { |
| 383 | dev_err(&client->dev, "Failed to alloc device name\n"); |
| 384 | return -ENOMEM; |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | charger->client = client; |
| 389 | |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 390 | supply_desc = &charger->charger_desc; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 391 | |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 392 | supply_desc->name = name; |
| 393 | supply_desc->type = POWER_SUPPLY_TYPE_MAINS; |
| 394 | supply_desc->properties = bq24735_charger_properties; |
| 395 | supply_desc->num_properties = ARRAY_SIZE(bq24735_charger_properties); |
| 396 | supply_desc->get_property = bq24735_charger_get_property; |
Peter Rosin | 5b7a018 | 2016-01-12 21:30:59 +0100 | [diff] [blame] | 397 | supply_desc->set_property = bq24735_charger_set_property; |
| 398 | supply_desc->property_is_writeable = |
| 399 | bq24735_charger_property_is_writeable; |
Krzysztof Kozlowski | 2dc9215 | 2015-03-12 08:44:02 +0100 | [diff] [blame] | 400 | |
| 401 | psy_cfg.supplied_to = charger->pdata->supplied_to; |
| 402 | psy_cfg.num_supplicants = charger->pdata->num_supplicants; |
| 403 | psy_cfg.of_node = client->dev.of_node; |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 404 | psy_cfg.drv_data = charger; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 405 | |
| 406 | i2c_set_clientdata(client, charger); |
| 407 | |
Paul Kocialkowski | c65a8b5 | 2016-09-03 00:09:53 +0200 | [diff] [blame] | 408 | charger->status_gpio = devm_gpiod_get_optional(&client->dev, |
| 409 | "ti,ac-detect", |
| 410 | GPIOD_IN); |
| 411 | if (IS_ERR(charger->status_gpio)) { |
| 412 | ret = PTR_ERR(charger->status_gpio); |
| 413 | dev_err(&client->dev, "Getting gpio failed: %d\n", ret); |
| 414 | return ret; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 415 | } |
| 416 | |
Peter Rosin | a7d143d | 2016-12-20 12:33:02 +0100 | [diff] [blame] | 417 | if (bq24735_charger_is_present(charger)) { |
Jonathan Tinkham | 1a3adce | 2016-02-02 23:03:44 -0700 | [diff] [blame] | 418 | ret = bq24735_read_word(client, BQ24735_MANUFACTURER_ID); |
| 419 | if (ret < 0) { |
| 420 | dev_err(&client->dev, "Failed to read manufacturer id : %d\n", |
| 421 | ret); |
| 422 | return ret; |
| 423 | } else if (ret != 0x0040) { |
| 424 | dev_err(&client->dev, |
| 425 | "manufacturer id mismatch. 0x0040 != 0x%04x\n", ret); |
| 426 | return -ENODEV; |
| 427 | } |
| 428 | |
| 429 | ret = bq24735_read_word(client, BQ24735_DEVICE_ID); |
| 430 | if (ret < 0) { |
| 431 | dev_err(&client->dev, "Failed to read device id : %d\n", ret); |
| 432 | return ret; |
| 433 | } else if (ret != 0x000B) { |
| 434 | dev_err(&client->dev, |
| 435 | "device id mismatch. 0x000b != 0x%04x\n", ret); |
| 436 | return -ENODEV; |
| 437 | } |
Jonathan Tinkham | 1a3adce | 2016-02-02 23:03:44 -0700 | [diff] [blame] | 438 | |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 439 | ret = bq24735_enable_charging(charger); |
| 440 | if (ret < 0) { |
| 441 | dev_err(&client->dev, "Failed to enable charging\n"); |
Vaishali Thakkar | 71a5a50 | 2015-07-25 09:23:16 +0530 | [diff] [blame] | 442 | return ret; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 443 | } |
| 444 | } |
| 445 | |
Vaishali Thakkar | 71a5a50 | 2015-07-25 09:23:16 +0530 | [diff] [blame] | 446 | charger->charger = devm_power_supply_register(&client->dev, supply_desc, |
| 447 | &psy_cfg); |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 448 | if (IS_ERR(charger->charger)) { |
| 449 | ret = PTR_ERR(charger->charger); |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 450 | dev_err(&client->dev, "Failed to register power supply: %d\n", |
| 451 | ret); |
Vaishali Thakkar | 71a5a50 | 2015-07-25 09:23:16 +0530 | [diff] [blame] | 452 | return ret; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | if (client->irq) { |
| 456 | ret = devm_request_threaded_irq(&client->dev, client->irq, |
| 457 | NULL, bq24735_charger_isr, |
| 458 | IRQF_TRIGGER_RISING | |
| 459 | IRQF_TRIGGER_FALLING | |
| 460 | IRQF_ONESHOT, |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 461 | supply_desc->name, |
| 462 | charger->charger); |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 463 | if (ret) { |
| 464 | dev_err(&client->dev, |
| 465 | "Unable to register IRQ %d err %d\n", |
| 466 | client->irq, ret); |
Vaishali Thakkar | 71a5a50 | 2015-07-25 09:23:16 +0530 | [diff] [blame] | 467 | return ret; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 468 | } |
Peter Rosin | dbff4c8 | 2016-12-21 22:29:52 +0100 | [diff] [blame] | 469 | } else { |
Peter Rosin | bf383fe | 2016-12-15 10:28:46 +0100 | [diff] [blame] | 470 | ret = device_property_read_u32(&client->dev, "poll-interval", |
| 471 | &charger->poll_interval); |
| 472 | if (ret) |
| 473 | return 0; |
| 474 | if (!charger->poll_interval) |
| 475 | return 0; |
| 476 | |
| 477 | INIT_DELAYED_WORK(&charger->poll, bq24735_poll); |
| 478 | schedule_delayed_work(&charger->poll, |
| 479 | msecs_to_jiffies(charger->poll_interval)); |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 480 | } |
| 481 | |
| 482 | return 0; |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 483 | } |
| 484 | |
Peter Rosin | bf383fe | 2016-12-15 10:28:46 +0100 | [diff] [blame] | 485 | static int bq24735_charger_remove(struct i2c_client *client) |
| 486 | { |
| 487 | struct bq24735 *charger = i2c_get_clientdata(client); |
| 488 | |
| 489 | if (charger->poll_interval) |
| 490 | cancel_delayed_work_sync(&charger->poll); |
| 491 | |
| 492 | return 0; |
| 493 | } |
| 494 | |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 495 | static const struct i2c_device_id bq24735_charger_id[] = { |
| 496 | { "bq24735-charger", 0 }, |
| 497 | {} |
| 498 | }; |
| 499 | MODULE_DEVICE_TABLE(i2c, bq24735_charger_id); |
| 500 | |
| 501 | static const struct of_device_id bq24735_match_ids[] = { |
| 502 | { .compatible = "ti,bq24735", }, |
| 503 | { /* end */ } |
| 504 | }; |
| 505 | MODULE_DEVICE_TABLE(of, bq24735_match_ids); |
| 506 | |
| 507 | static struct i2c_driver bq24735_charger_driver = { |
| 508 | .driver = { |
| 509 | .name = "bq24735-charger", |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 510 | .of_match_table = bq24735_match_ids, |
| 511 | }, |
| 512 | .probe = bq24735_charger_probe, |
Peter Rosin | bf383fe | 2016-12-15 10:28:46 +0100 | [diff] [blame] | 513 | .remove = bq24735_charger_remove, |
Darbha Sriharsha | ce77399 | 2013-10-11 17:15:43 -0400 | [diff] [blame] | 514 | .id_table = bq24735_charger_id, |
| 515 | }; |
| 516 | |
| 517 | module_i2c_driver(bq24735_charger_driver); |
| 518 | |
| 519 | MODULE_DESCRIPTION("bq24735 battery charging driver"); |
| 520 | MODULE_AUTHOR("Darbha Sriharsha <dsriharsha@nvidia.com>"); |
| 521 | MODULE_LICENSE("GPL v2"); |