Commit | Line | Data |
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a7640bfa | 1 | /* |
3ddca062 | 2 | * Gas Gauge driver for SBS Compliant Batteries |
a7640bfa RK |
3 | * |
4 | * Copyright (c) 2010, NVIDIA Corporation. | |
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; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
19 | */ | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/err.h> | |
25 | #include <linux/power_supply.h> | |
26 | #include <linux/i2c.h> | |
27 | #include <linux/slab.h> | |
bb879101 RK |
28 | #include <linux/interrupt.h> |
29 | #include <linux/gpio.h> | |
075ed03c | 30 | #include <linux/of.h> |
f4ed950a | 31 | #include <linux/stat.h> |
bb879101 | 32 | |
3ddca062 | 33 | #include <linux/power/sbs-battery.h> |
a7640bfa RK |
34 | |
35 | enum { | |
36 | REG_MANUFACTURER_DATA, | |
37 | REG_TEMPERATURE, | |
38 | REG_VOLTAGE, | |
39 | REG_CURRENT, | |
40 | REG_CAPACITY, | |
41 | REG_TIME_TO_EMPTY, | |
42 | REG_TIME_TO_FULL, | |
43 | REG_STATUS, | |
44 | REG_CYCLE_COUNT, | |
d3ab61ec RK |
45 | REG_SERIAL_NUMBER, |
46 | REG_REMAINING_CAPACITY, | |
51d07566 | 47 | REG_REMAINING_CAPACITY_CHARGE, |
d3ab61ec | 48 | REG_FULL_CHARGE_CAPACITY, |
51d07566 | 49 | REG_FULL_CHARGE_CAPACITY_CHARGE, |
d3ab61ec | 50 | REG_DESIGN_CAPACITY, |
51d07566 | 51 | REG_DESIGN_CAPACITY_CHARGE, |
4495b0ad SQ |
52 | REG_DESIGN_VOLTAGE_MIN, |
53 | REG_DESIGN_VOLTAGE_MAX, | |
9ea89402 CYC |
54 | REG_MANUFACTURER, |
55 | REG_MODEL_NAME, | |
a7640bfa RK |
56 | }; |
57 | ||
51d07566 RK |
58 | /* Battery Mode defines */ |
59 | #define BATTERY_MODE_OFFSET 0x03 | |
60 | #define BATTERY_MODE_MASK 0x8000 | |
3ddca062 | 61 | enum sbs_battery_mode { |
51d07566 RK |
62 | BATTERY_MODE_AMPS, |
63 | BATTERY_MODE_WATTS | |
64 | }; | |
65 | ||
a7640bfa RK |
66 | /* manufacturer access defines */ |
67 | #define MANUFACTURER_ACCESS_STATUS 0x0006 | |
68 | #define MANUFACTURER_ACCESS_SLEEP 0x0011 | |
69 | ||
70 | /* battery status value bits */ | |
d3ab61ec | 71 | #define BATTERY_DISCHARGING 0x40 |
a7640bfa RK |
72 | #define BATTERY_FULL_CHARGED 0x20 |
73 | #define BATTERY_FULL_DISCHARGED 0x10 | |
74 | ||
9ea89402 | 75 | /* min_value and max_value are only valid for numerical data */ |
3ddca062 | 76 | #define SBS_DATA(_psp, _addr, _min_value, _max_value) { \ |
a7640bfa RK |
77 | .psp = _psp, \ |
78 | .addr = _addr, \ | |
79 | .min_value = _min_value, \ | |
80 | .max_value = _max_value, \ | |
81 | } | |
82 | ||
3ddca062 | 83 | static const struct chip_data { |
a7640bfa RK |
84 | enum power_supply_property psp; |
85 | u8 addr; | |
86 | int min_value; | |
87 | int max_value; | |
3ddca062 | 88 | } sbs_data[] = { |
a7640bfa | 89 | [REG_MANUFACTURER_DATA] = |
3ddca062 | 90 | SBS_DATA(POWER_SUPPLY_PROP_PRESENT, 0x00, 0, 65535), |
a7640bfa | 91 | [REG_TEMPERATURE] = |
3ddca062 | 92 | SBS_DATA(POWER_SUPPLY_PROP_TEMP, 0x08, 0, 65535), |
a7640bfa | 93 | [REG_VOLTAGE] = |
3ddca062 | 94 | SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_NOW, 0x09, 0, 20000), |
a7640bfa | 95 | [REG_CURRENT] = |
3ddca062 | 96 | SBS_DATA(POWER_SUPPLY_PROP_CURRENT_NOW, 0x0A, -32768, 32767), |
a7640bfa | 97 | [REG_CAPACITY] = |
b1f092f6 | 98 | SBS_DATA(POWER_SUPPLY_PROP_CAPACITY, 0x0D, 0, 100), |
d3ab61ec | 99 | [REG_REMAINING_CAPACITY] = |
3ddca062 | 100 | SBS_DATA(POWER_SUPPLY_PROP_ENERGY_NOW, 0x0F, 0, 65535), |
51d07566 | 101 | [REG_REMAINING_CAPACITY_CHARGE] = |
3ddca062 | 102 | SBS_DATA(POWER_SUPPLY_PROP_CHARGE_NOW, 0x0F, 0, 65535), |
d3ab61ec | 103 | [REG_FULL_CHARGE_CAPACITY] = |
3ddca062 | 104 | SBS_DATA(POWER_SUPPLY_PROP_ENERGY_FULL, 0x10, 0, 65535), |
51d07566 | 105 | [REG_FULL_CHARGE_CAPACITY_CHARGE] = |
3ddca062 | 106 | SBS_DATA(POWER_SUPPLY_PROP_CHARGE_FULL, 0x10, 0, 65535), |
a7640bfa | 107 | [REG_TIME_TO_EMPTY] = |
3ddca062 | 108 | SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, 0x12, 0, 65535), |
a7640bfa | 109 | [REG_TIME_TO_FULL] = |
3ddca062 | 110 | SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 0x13, 0, 65535), |
a7640bfa | 111 | [REG_STATUS] = |
3ddca062 | 112 | SBS_DATA(POWER_SUPPLY_PROP_STATUS, 0x16, 0, 65535), |
a7640bfa | 113 | [REG_CYCLE_COUNT] = |
3ddca062 | 114 | SBS_DATA(POWER_SUPPLY_PROP_CYCLE_COUNT, 0x17, 0, 65535), |
d3ab61ec | 115 | [REG_DESIGN_CAPACITY] = |
3ddca062 | 116 | SBS_DATA(POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 0x18, 0, 65535), |
51d07566 | 117 | [REG_DESIGN_CAPACITY_CHARGE] = |
3ddca062 | 118 | SBS_DATA(POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 0x18, 0, 65535), |
4495b0ad SQ |
119 | [REG_DESIGN_VOLTAGE_MIN] = |
120 | SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 0x19, 0, 65535), | |
121 | [REG_DESIGN_VOLTAGE_MAX] = | |
3ddca062 | 122 | SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 0x19, 0, 65535), |
a7640bfa | 123 | [REG_SERIAL_NUMBER] = |
3ddca062 | 124 | SBS_DATA(POWER_SUPPLY_PROP_SERIAL_NUMBER, 0x1C, 0, 65535), |
9ea89402 CYC |
125 | /* Properties of type `const char *' */ |
126 | [REG_MANUFACTURER] = | |
127 | SBS_DATA(POWER_SUPPLY_PROP_MANUFACTURER, 0x20, 0, 65535), | |
128 | [REG_MODEL_NAME] = | |
129 | SBS_DATA(POWER_SUPPLY_PROP_MODEL_NAME, 0x21, 0, 65535) | |
a7640bfa RK |
130 | }; |
131 | ||
3ddca062 | 132 | static enum power_supply_property sbs_properties[] = { |
a7640bfa RK |
133 | POWER_SUPPLY_PROP_STATUS, |
134 | POWER_SUPPLY_PROP_HEALTH, | |
135 | POWER_SUPPLY_PROP_PRESENT, | |
136 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
137 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
138 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
139 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
140 | POWER_SUPPLY_PROP_CAPACITY, | |
141 | POWER_SUPPLY_PROP_TEMP, | |
142 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
143 | POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, | |
144 | POWER_SUPPLY_PROP_SERIAL_NUMBER, | |
4495b0ad | 145 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
d3ab61ec RK |
146 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, |
147 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
148 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
149 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, | |
51d07566 RK |
150 | POWER_SUPPLY_PROP_CHARGE_NOW, |
151 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
152 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
9ea89402 CYC |
153 | /* Properties of type `const char *' */ |
154 | POWER_SUPPLY_PROP_MANUFACTURER, | |
155 | POWER_SUPPLY_PROP_MODEL_NAME | |
a7640bfa RK |
156 | }; |
157 | ||
3ddca062 | 158 | struct sbs_info { |
bb879101 | 159 | struct i2c_client *client; |
297d716f | 160 | struct power_supply *power_supply; |
3ddca062 | 161 | struct sbs_platform_data *pdata; |
bb879101 RK |
162 | bool is_present; |
163 | bool gpio_detect; | |
164 | bool enable_detection; | |
165 | int irq; | |
58ddafae RK |
166 | int last_state; |
167 | int poll_time; | |
168 | struct delayed_work work; | |
169 | int ignore_changes; | |
a7640bfa RK |
170 | }; |
171 | ||
9ea89402 CYC |
172 | static char model_name[I2C_SMBUS_BLOCK_MAX + 1]; |
173 | static char manufacturer[I2C_SMBUS_BLOCK_MAX + 1]; | |
f4ed950a | 174 | static bool force_load; |
9ea89402 | 175 | |
3ddca062 | 176 | static int sbs_read_word_data(struct i2c_client *client, u8 address) |
d3ab61ec | 177 | { |
3ddca062 | 178 | struct sbs_info *chip = i2c_get_clientdata(client); |
ff28fcef RK |
179 | s32 ret = 0; |
180 | int retries = 1; | |
181 | ||
3ddca062 RK |
182 | if (chip->pdata) |
183 | retries = max(chip->pdata->i2c_retry_count + 1, 1); | |
ff28fcef RK |
184 | |
185 | while (retries > 0) { | |
186 | ret = i2c_smbus_read_word_data(client, address); | |
187 | if (ret >= 0) | |
188 | break; | |
189 | retries--; | |
190 | } | |
d3ab61ec | 191 | |
d3ab61ec | 192 | if (ret < 0) { |
a7d9ace4 | 193 | dev_dbg(&client->dev, |
d3ab61ec RK |
194 | "%s: i2c read at address 0x%x failed\n", |
195 | __func__, address); | |
196 | return ret; | |
197 | } | |
ff28fcef | 198 | |
d3ab61ec RK |
199 | return le16_to_cpu(ret); |
200 | } | |
201 | ||
9ea89402 CYC |
202 | static int sbs_read_string_data(struct i2c_client *client, u8 address, |
203 | char *values) | |
204 | { | |
205 | struct sbs_info *chip = i2c_get_clientdata(client); | |
206 | s32 ret = 0, block_length = 0; | |
207 | int retries_length = 1, retries_block = 1; | |
208 | u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; | |
209 | ||
210 | if (chip->pdata) { | |
211 | retries_length = max(chip->pdata->i2c_retry_count + 1, 1); | |
212 | retries_block = max(chip->pdata->i2c_retry_count + 1, 1); | |
213 | } | |
214 | ||
215 | /* Adapter needs to support these two functions */ | |
216 | if (!i2c_check_functionality(client->adapter, | |
217 | I2C_FUNC_SMBUS_BYTE_DATA | | |
218 | I2C_FUNC_SMBUS_I2C_BLOCK)){ | |
219 | return -ENODEV; | |
220 | } | |
221 | ||
222 | /* Get the length of block data */ | |
223 | while (retries_length > 0) { | |
224 | ret = i2c_smbus_read_byte_data(client, address); | |
225 | if (ret >= 0) | |
226 | break; | |
227 | retries_length--; | |
228 | } | |
229 | ||
230 | if (ret < 0) { | |
231 | dev_dbg(&client->dev, | |
232 | "%s: i2c read at address 0x%x failed\n", | |
233 | __func__, address); | |
234 | return ret; | |
235 | } | |
236 | ||
237 | /* block_length does not include NULL terminator */ | |
238 | block_length = ret; | |
239 | if (block_length > I2C_SMBUS_BLOCK_MAX) { | |
240 | dev_err(&client->dev, | |
241 | "%s: Returned block_length is longer than 0x%x\n", | |
242 | __func__, I2C_SMBUS_BLOCK_MAX); | |
243 | return -EINVAL; | |
244 | } | |
245 | ||
246 | /* Get the block data */ | |
247 | while (retries_block > 0) { | |
248 | ret = i2c_smbus_read_i2c_block_data( | |
249 | client, address, | |
250 | block_length + 1, block_buffer); | |
251 | if (ret >= 0) | |
252 | break; | |
253 | retries_block--; | |
254 | } | |
255 | ||
256 | if (ret < 0) { | |
257 | dev_dbg(&client->dev, | |
258 | "%s: i2c read at address 0x%x failed\n", | |
259 | __func__, address); | |
260 | return ret; | |
261 | } | |
262 | ||
263 | /* block_buffer[0] == block_length */ | |
264 | memcpy(values, block_buffer + 1, block_length); | |
265 | values[block_length] = '\0'; | |
266 | ||
267 | return le16_to_cpu(ret); | |
268 | } | |
269 | ||
3ddca062 | 270 | static int sbs_write_word_data(struct i2c_client *client, u8 address, |
d3ab61ec RK |
271 | u16 value) |
272 | { | |
3ddca062 | 273 | struct sbs_info *chip = i2c_get_clientdata(client); |
ff28fcef RK |
274 | s32 ret = 0; |
275 | int retries = 1; | |
276 | ||
3ddca062 RK |
277 | if (chip->pdata) |
278 | retries = max(chip->pdata->i2c_retry_count + 1, 1); | |
ff28fcef RK |
279 | |
280 | while (retries > 0) { | |
281 | ret = i2c_smbus_write_word_data(client, address, | |
282 | le16_to_cpu(value)); | |
283 | if (ret >= 0) | |
284 | break; | |
285 | retries--; | |
286 | } | |
d3ab61ec | 287 | |
d3ab61ec | 288 | if (ret < 0) { |
a7d9ace4 | 289 | dev_dbg(&client->dev, |
d3ab61ec RK |
290 | "%s: i2c write to address 0x%x failed\n", |
291 | __func__, address); | |
292 | return ret; | |
293 | } | |
ff28fcef | 294 | |
d3ab61ec RK |
295 | return 0; |
296 | } | |
297 | ||
3ddca062 | 298 | static int sbs_get_battery_presence_and_health( |
a7640bfa RK |
299 | struct i2c_client *client, enum power_supply_property psp, |
300 | union power_supply_propval *val) | |
301 | { | |
302 | s32 ret; | |
3ddca062 | 303 | struct sbs_info *chip = i2c_get_clientdata(client); |
bb879101 RK |
304 | |
305 | if (psp == POWER_SUPPLY_PROP_PRESENT && | |
3ddca062 RK |
306 | chip->gpio_detect) { |
307 | ret = gpio_get_value(chip->pdata->battery_detect); | |
308 | if (ret == chip->pdata->battery_detect_present) | |
bb879101 RK |
309 | val->intval = 1; |
310 | else | |
311 | val->intval = 0; | |
3ddca062 | 312 | chip->is_present = val->intval; |
bb879101 RK |
313 | return ret; |
314 | } | |
a7640bfa RK |
315 | |
316 | /* Write to ManufacturerAccess with | |
317 | * ManufacturerAccess command and then | |
318 | * read the status */ | |
3ddca062 RK |
319 | ret = sbs_write_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr, |
320 | MANUFACTURER_ACCESS_STATUS); | |
bb879101 RK |
321 | if (ret < 0) { |
322 | if (psp == POWER_SUPPLY_PROP_PRESENT) | |
323 | val->intval = 0; /* battery removed */ | |
d3ab61ec | 324 | return ret; |
bb879101 | 325 | } |
a7640bfa | 326 | |
3ddca062 | 327 | ret = sbs_read_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr); |
a7d9ace4 RK |
328 | if (ret < 0) |
329 | return ret; | |
330 | ||
3ddca062 RK |
331 | if (ret < sbs_data[REG_MANUFACTURER_DATA].min_value || |
332 | ret > sbs_data[REG_MANUFACTURER_DATA].max_value) { | |
a7640bfa RK |
333 | val->intval = 0; |
334 | return 0; | |
335 | } | |
336 | ||
337 | /* Mask the upper nibble of 2nd byte and | |
338 | * lower byte of response then | |
339 | * shift the result by 8 to get status*/ | |
340 | ret &= 0x0F00; | |
341 | ret >>= 8; | |
342 | if (psp == POWER_SUPPLY_PROP_PRESENT) { | |
343 | if (ret == 0x0F) | |
344 | /* battery removed */ | |
345 | val->intval = 0; | |
346 | else | |
347 | val->intval = 1; | |
348 | } else if (psp == POWER_SUPPLY_PROP_HEALTH) { | |
349 | if (ret == 0x09) | |
350 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
351 | else if (ret == 0x0B) | |
352 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
353 | else if (ret == 0x0C) | |
354 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
355 | else | |
356 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
357 | } | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
3ddca062 | 362 | static int sbs_get_battery_property(struct i2c_client *client, |
a7640bfa RK |
363 | int reg_offset, enum power_supply_property psp, |
364 | union power_supply_propval *val) | |
365 | { | |
3ddca062 | 366 | struct sbs_info *chip = i2c_get_clientdata(client); |
a7640bfa RK |
367 | s32 ret; |
368 | ||
3ddca062 | 369 | ret = sbs_read_word_data(client, sbs_data[reg_offset].addr); |
d3ab61ec RK |
370 | if (ret < 0) |
371 | return ret; | |
372 | ||
373 | /* returned values are 16 bit */ | |
3ddca062 | 374 | if (sbs_data[reg_offset].min_value < 0) |
d3ab61ec | 375 | ret = (s16)ret; |
a7640bfa | 376 | |
3ddca062 RK |
377 | if (ret >= sbs_data[reg_offset].min_value && |
378 | ret <= sbs_data[reg_offset].max_value) { | |
a7640bfa | 379 | val->intval = ret; |
58ddafae RK |
380 | if (psp != POWER_SUPPLY_PROP_STATUS) |
381 | return 0; | |
382 | ||
383 | if (ret & BATTERY_FULL_CHARGED) | |
384 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
385 | else if (ret & BATTERY_FULL_DISCHARGED) | |
386 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
387 | else if (ret & BATTERY_DISCHARGING) | |
388 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
389 | else | |
390 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
391 | ||
3ddca062 RK |
392 | if (chip->poll_time == 0) |
393 | chip->last_state = val->intval; | |
394 | else if (chip->last_state != val->intval) { | |
395 | cancel_delayed_work_sync(&chip->work); | |
297d716f | 396 | power_supply_changed(chip->power_supply); |
3ddca062 | 397 | chip->poll_time = 0; |
a7640bfa | 398 | } |
a7640bfa RK |
399 | } else { |
400 | if (psp == POWER_SUPPLY_PROP_STATUS) | |
401 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
402 | else | |
403 | val->intval = 0; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
9ea89402 CYC |
409 | static int sbs_get_battery_string_property(struct i2c_client *client, |
410 | int reg_offset, enum power_supply_property psp, char *val) | |
411 | { | |
412 | s32 ret; | |
413 | ||
414 | ret = sbs_read_string_data(client, sbs_data[reg_offset].addr, val); | |
415 | ||
416 | if (ret < 0) | |
417 | return ret; | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
3ddca062 | 422 | static void sbs_unit_adjustment(struct i2c_client *client, |
d3ab61ec RK |
423 | enum power_supply_property psp, union power_supply_propval *val) |
424 | { | |
425 | #define BASE_UNIT_CONVERSION 1000 | |
426 | #define BATTERY_MODE_CAP_MULT_WATT (10 * BASE_UNIT_CONVERSION) | |
909a78b3 BL |
427 | #define TIME_UNIT_CONVERSION 60 |
428 | #define TEMP_KELVIN_TO_CELSIUS 2731 | |
d3ab61ec RK |
429 | switch (psp) { |
430 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
431 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
432 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
3ddca062 | 433 | /* sbs provides energy in units of 10mWh. |
909a78b3 BL |
434 | * Convert to µWh |
435 | */ | |
d3ab61ec RK |
436 | val->intval *= BATTERY_MODE_CAP_MULT_WATT; |
437 | break; | |
438 | ||
439 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
4495b0ad | 440 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
d3ab61ec RK |
441 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
442 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
51d07566 RK |
443 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
444 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
445 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
d3ab61ec RK |
446 | val->intval *= BASE_UNIT_CONVERSION; |
447 | break; | |
448 | ||
449 | case POWER_SUPPLY_PROP_TEMP: | |
3ddca062 | 450 | /* sbs provides battery temperature in 0.1K |
909a78b3 BL |
451 | * so convert it to 0.1°C |
452 | */ | |
453 | val->intval -= TEMP_KELVIN_TO_CELSIUS; | |
d3ab61ec RK |
454 | break; |
455 | ||
456 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
457 | case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG: | |
3ddca062 | 458 | /* sbs provides time to empty and time to full in minutes. |
909a78b3 BL |
459 | * Convert to seconds |
460 | */ | |
d3ab61ec RK |
461 | val->intval *= TIME_UNIT_CONVERSION; |
462 | break; | |
463 | ||
464 | default: | |
465 | dev_dbg(&client->dev, | |
466 | "%s: no need for unit conversion %d\n", __func__, psp); | |
467 | } | |
468 | } | |
469 | ||
3ddca062 RK |
470 | static enum sbs_battery_mode sbs_set_battery_mode(struct i2c_client *client, |
471 | enum sbs_battery_mode mode) | |
51d07566 RK |
472 | { |
473 | int ret, original_val; | |
474 | ||
3ddca062 | 475 | original_val = sbs_read_word_data(client, BATTERY_MODE_OFFSET); |
51d07566 RK |
476 | if (original_val < 0) |
477 | return original_val; | |
478 | ||
479 | if ((original_val & BATTERY_MODE_MASK) == mode) | |
480 | return mode; | |
481 | ||
482 | if (mode == BATTERY_MODE_AMPS) | |
483 | ret = original_val & ~BATTERY_MODE_MASK; | |
484 | else | |
485 | ret = original_val | BATTERY_MODE_MASK; | |
486 | ||
3ddca062 | 487 | ret = sbs_write_word_data(client, BATTERY_MODE_OFFSET, ret); |
51d07566 RK |
488 | if (ret < 0) |
489 | return ret; | |
490 | ||
491 | return original_val & BATTERY_MODE_MASK; | |
492 | } | |
493 | ||
3ddca062 | 494 | static int sbs_get_battery_capacity(struct i2c_client *client, |
d3ab61ec | 495 | int reg_offset, enum power_supply_property psp, |
a7640bfa RK |
496 | union power_supply_propval *val) |
497 | { | |
498 | s32 ret; | |
3ddca062 | 499 | enum sbs_battery_mode mode = BATTERY_MODE_WATTS; |
51d07566 RK |
500 | |
501 | if (power_supply_is_amp_property(psp)) | |
502 | mode = BATTERY_MODE_AMPS; | |
503 | ||
3ddca062 | 504 | mode = sbs_set_battery_mode(client, mode); |
51d07566 RK |
505 | if (mode < 0) |
506 | return mode; | |
a7640bfa | 507 | |
3ddca062 | 508 | ret = sbs_read_word_data(client, sbs_data[reg_offset].addr); |
d3ab61ec RK |
509 | if (ret < 0) |
510 | return ret; | |
a7640bfa | 511 | |
d3ab61ec | 512 | if (psp == POWER_SUPPLY_PROP_CAPACITY) { |
3ddca062 | 513 | /* sbs spec says that this can be >100 % |
d3ab61ec RK |
514 | * even if max value is 100 % */ |
515 | val->intval = min(ret, 100); | |
516 | } else | |
517 | val->intval = ret; | |
518 | ||
3ddca062 | 519 | ret = sbs_set_battery_mode(client, mode); |
51d07566 RK |
520 | if (ret < 0) |
521 | return ret; | |
522 | ||
d3ab61ec RK |
523 | return 0; |
524 | } | |
525 | ||
3ddca062 RK |
526 | static char sbs_serial[5]; |
527 | static int sbs_get_battery_serial_number(struct i2c_client *client, | |
d3ab61ec RK |
528 | union power_supply_propval *val) |
529 | { | |
530 | int ret; | |
531 | ||
3ddca062 | 532 | ret = sbs_read_word_data(client, sbs_data[REG_SERIAL_NUMBER].addr); |
d3ab61ec RK |
533 | if (ret < 0) |
534 | return ret; | |
535 | ||
3ddca062 RK |
536 | ret = sprintf(sbs_serial, "%04x", ret); |
537 | val->strval = sbs_serial; | |
a7640bfa RK |
538 | |
539 | return 0; | |
540 | } | |
541 | ||
3ddca062 | 542 | static int sbs_get_property_index(struct i2c_client *client, |
51d07566 RK |
543 | enum power_supply_property psp) |
544 | { | |
545 | int count; | |
3ddca062 RK |
546 | for (count = 0; count < ARRAY_SIZE(sbs_data); count++) |
547 | if (psp == sbs_data[count].psp) | |
51d07566 RK |
548 | return count; |
549 | ||
550 | dev_warn(&client->dev, | |
551 | "%s: Invalid Property - %d\n", __func__, psp); | |
552 | ||
553 | return -EINVAL; | |
554 | } | |
555 | ||
3ddca062 | 556 | static int sbs_get_property(struct power_supply *psy, |
a7640bfa RK |
557 | enum power_supply_property psp, |
558 | union power_supply_propval *val) | |
559 | { | |
bb879101 | 560 | int ret = 0; |
297d716f | 561 | struct sbs_info *chip = power_supply_get_drvdata(psy); |
3ddca062 | 562 | struct i2c_client *client = chip->client; |
a7640bfa RK |
563 | |
564 | switch (psp) { | |
565 | case POWER_SUPPLY_PROP_PRESENT: | |
566 | case POWER_SUPPLY_PROP_HEALTH: | |
3ddca062 | 567 | ret = sbs_get_battery_presence_and_health(client, psp, val); |
a7d9ace4 RK |
568 | if (psp == POWER_SUPPLY_PROP_PRESENT) |
569 | return 0; | |
a7640bfa RK |
570 | break; |
571 | ||
572 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
573 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
5da50988 | 574 | goto done; /* don't trigger power_supply_changed()! */ |
a7640bfa | 575 | |
d3ab61ec RK |
576 | case POWER_SUPPLY_PROP_ENERGY_NOW: |
577 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
578 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
51d07566 RK |
579 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
580 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
581 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
a7640bfa | 582 | case POWER_SUPPLY_PROP_CAPACITY: |
3ddca062 | 583 | ret = sbs_get_property_index(client, psp); |
bb879101 RK |
584 | if (ret < 0) |
585 | break; | |
d3ab61ec | 586 | |
3ddca062 | 587 | ret = sbs_get_battery_capacity(client, ret, psp, val); |
d3ab61ec RK |
588 | break; |
589 | ||
590 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: | |
3ddca062 | 591 | ret = sbs_get_battery_serial_number(client, val); |
a7640bfa RK |
592 | break; |
593 | ||
594 | case POWER_SUPPLY_PROP_STATUS: | |
595 | case POWER_SUPPLY_PROP_CYCLE_COUNT: | |
596 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
597 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
598 | case POWER_SUPPLY_PROP_TEMP: | |
599 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
600 | case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG: | |
4495b0ad | 601 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
d3ab61ec | 602 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
3ddca062 | 603 | ret = sbs_get_property_index(client, psp); |
bb879101 RK |
604 | if (ret < 0) |
605 | break; | |
d3ab61ec | 606 | |
3ddca062 | 607 | ret = sbs_get_battery_property(client, ret, psp, val); |
a7640bfa RK |
608 | break; |
609 | ||
9ea89402 CYC |
610 | case POWER_SUPPLY_PROP_MODEL_NAME: |
611 | ret = sbs_get_property_index(client, psp); | |
612 | if (ret < 0) | |
613 | break; | |
614 | ||
615 | ret = sbs_get_battery_string_property(client, ret, psp, | |
616 | model_name); | |
617 | val->strval = model_name; | |
618 | break; | |
619 | ||
620 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
621 | ret = sbs_get_property_index(client, psp); | |
622 | if (ret < 0) | |
623 | break; | |
624 | ||
625 | ret = sbs_get_battery_string_property(client, ret, psp, | |
626 | manufacturer); | |
627 | val->strval = manufacturer; | |
628 | break; | |
629 | ||
a7640bfa RK |
630 | default: |
631 | dev_err(&client->dev, | |
632 | "%s: INVALID property\n", __func__); | |
633 | return -EINVAL; | |
634 | } | |
635 | ||
3ddca062 | 636 | if (!chip->enable_detection) |
bb879101 RK |
637 | goto done; |
638 | ||
3ddca062 RK |
639 | if (!chip->gpio_detect && |
640 | chip->is_present != (ret >= 0)) { | |
641 | chip->is_present = (ret >= 0); | |
297d716f | 642 | power_supply_changed(chip->power_supply); |
bb879101 RK |
643 | } |
644 | ||
645 | done: | |
646 | if (!ret) { | |
647 | /* Convert units to match requirements for power supply class */ | |
3ddca062 | 648 | sbs_unit_adjustment(client, psp, val); |
bb879101 | 649 | } |
d3ab61ec | 650 | |
a7640bfa | 651 | dev_dbg(&client->dev, |
a7d9ace4 RK |
652 | "%s: property = %d, value = %x\n", __func__, psp, val->intval); |
653 | ||
3ddca062 | 654 | if (ret && chip->is_present) |
a7d9ace4 RK |
655 | return ret; |
656 | ||
657 | /* battery not present, so return NODATA for properties */ | |
658 | if (ret) | |
659 | return -ENODATA; | |
a7640bfa | 660 | |
a7d9ace4 | 661 | return 0; |
a7640bfa RK |
662 | } |
663 | ||
3ddca062 | 664 | static irqreturn_t sbs_irq(int irq, void *devid) |
bb879101 RK |
665 | { |
666 | struct power_supply *battery = devid; | |
667 | ||
668 | power_supply_changed(battery); | |
669 | ||
670 | return IRQ_HANDLED; | |
671 | } | |
672 | ||
3ddca062 | 673 | static void sbs_external_power_changed(struct power_supply *psy) |
58ddafae | 674 | { |
297d716f | 675 | struct sbs_info *chip = power_supply_get_drvdata(psy); |
58ddafae | 676 | |
3ddca062 RK |
677 | if (chip->ignore_changes > 0) { |
678 | chip->ignore_changes--; | |
58ddafae RK |
679 | return; |
680 | } | |
681 | ||
682 | /* cancel outstanding work */ | |
3ddca062 | 683 | cancel_delayed_work_sync(&chip->work); |
58ddafae | 684 | |
3ddca062 RK |
685 | schedule_delayed_work(&chip->work, HZ); |
686 | chip->poll_time = chip->pdata->poll_retry_count; | |
58ddafae RK |
687 | } |
688 | ||
3ddca062 | 689 | static void sbs_delayed_work(struct work_struct *work) |
58ddafae | 690 | { |
3ddca062 | 691 | struct sbs_info *chip; |
58ddafae RK |
692 | s32 ret; |
693 | ||
3ddca062 | 694 | chip = container_of(work, struct sbs_info, work.work); |
58ddafae | 695 | |
3ddca062 | 696 | ret = sbs_read_word_data(chip->client, sbs_data[REG_STATUS].addr); |
58ddafae RK |
697 | /* if the read failed, give up on this work */ |
698 | if (ret < 0) { | |
3ddca062 | 699 | chip->poll_time = 0; |
58ddafae RK |
700 | return; |
701 | } | |
702 | ||
703 | if (ret & BATTERY_FULL_CHARGED) | |
704 | ret = POWER_SUPPLY_STATUS_FULL; | |
705 | else if (ret & BATTERY_FULL_DISCHARGED) | |
706 | ret = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
707 | else if (ret & BATTERY_DISCHARGING) | |
708 | ret = POWER_SUPPLY_STATUS_DISCHARGING; | |
709 | else | |
710 | ret = POWER_SUPPLY_STATUS_CHARGING; | |
711 | ||
3ddca062 RK |
712 | if (chip->last_state != ret) { |
713 | chip->poll_time = 0; | |
297d716f | 714 | power_supply_changed(chip->power_supply); |
58ddafae RK |
715 | return; |
716 | } | |
3ddca062 RK |
717 | if (chip->poll_time > 0) { |
718 | schedule_delayed_work(&chip->work, HZ); | |
719 | chip->poll_time--; | |
58ddafae RK |
720 | return; |
721 | } | |
722 | } | |
723 | ||
6c75ea1e RK |
724 | #if defined(CONFIG_OF) |
725 | ||
726 | #include <linux/of_device.h> | |
727 | #include <linux/of_gpio.h> | |
728 | ||
3ddca062 RK |
729 | static const struct of_device_id sbs_dt_ids[] = { |
730 | { .compatible = "sbs,sbs-battery" }, | |
6c75ea1e RK |
731 | { .compatible = "ti,bq20z75" }, |
732 | { } | |
733 | }; | |
62df3935 | 734 | MODULE_DEVICE_TABLE(of, sbs_dt_ids); |
6c75ea1e | 735 | |
3ddca062 | 736 | static struct sbs_platform_data *sbs_of_populate_pdata( |
6c75ea1e RK |
737 | struct i2c_client *client) |
738 | { | |
739 | struct device_node *of_node = client->dev.of_node; | |
3ddca062 | 740 | struct sbs_platform_data *pdata = client->dev.platform_data; |
6c75ea1e RK |
741 | enum of_gpio_flags gpio_flags; |
742 | int rc; | |
743 | u32 prop; | |
744 | ||
745 | /* verify this driver matches this device */ | |
746 | if (!of_node) | |
747 | return NULL; | |
748 | ||
749 | /* if platform data is set, honor it */ | |
750 | if (pdata) | |
751 | return pdata; | |
752 | ||
753 | /* first make sure at least one property is set, otherwise | |
754 | * it won't change behavior from running without pdata. | |
755 | */ | |
3ddca062 RK |
756 | if (!of_get_property(of_node, "sbs,i2c-retry-count", NULL) && |
757 | !of_get_property(of_node, "sbs,poll-retry-count", NULL) && | |
758 | !of_get_property(of_node, "sbs,battery-detect-gpios", NULL)) | |
6c75ea1e RK |
759 | goto of_out; |
760 | ||
3ddca062 | 761 | pdata = devm_kzalloc(&client->dev, sizeof(struct sbs_platform_data), |
6c75ea1e RK |
762 | GFP_KERNEL); |
763 | if (!pdata) | |
764 | goto of_out; | |
765 | ||
3ddca062 | 766 | rc = of_property_read_u32(of_node, "sbs,i2c-retry-count", &prop); |
6c75ea1e RK |
767 | if (!rc) |
768 | pdata->i2c_retry_count = prop; | |
769 | ||
3ddca062 | 770 | rc = of_property_read_u32(of_node, "sbs,poll-retry-count", &prop); |
6c75ea1e RK |
771 | if (!rc) |
772 | pdata->poll_retry_count = prop; | |
773 | ||
3ddca062 | 774 | if (!of_get_property(of_node, "sbs,battery-detect-gpios", NULL)) { |
6c75ea1e RK |
775 | pdata->battery_detect = -1; |
776 | goto of_out; | |
777 | } | |
778 | ||
779 | pdata->battery_detect = of_get_named_gpio_flags(of_node, | |
3ddca062 | 780 | "sbs,battery-detect-gpios", 0, &gpio_flags); |
6c75ea1e RK |
781 | |
782 | if (gpio_flags & OF_GPIO_ACTIVE_LOW) | |
783 | pdata->battery_detect_present = 0; | |
784 | else | |
785 | pdata->battery_detect_present = 1; | |
786 | ||
787 | of_out: | |
788 | return pdata; | |
789 | } | |
790 | #else | |
3ddca062 | 791 | static struct sbs_platform_data *sbs_of_populate_pdata( |
6c75ea1e RK |
792 | struct i2c_client *client) |
793 | { | |
794 | return client->dev.platform_data; | |
795 | } | |
796 | #endif | |
797 | ||
297d716f KK |
798 | static const struct power_supply_desc sbs_default_desc = { |
799 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
800 | .properties = sbs_properties, | |
801 | .num_properties = ARRAY_SIZE(sbs_properties), | |
802 | .get_property = sbs_get_property, | |
803 | .external_power_changed = sbs_external_power_changed, | |
804 | }; | |
805 | ||
c8afa640 | 806 | static int sbs_probe(struct i2c_client *client, |
a7640bfa RK |
807 | const struct i2c_device_id *id) |
808 | { | |
3ddca062 | 809 | struct sbs_info *chip; |
297d716f | 810 | struct power_supply_desc *sbs_desc; |
3ddca062 | 811 | struct sbs_platform_data *pdata = client->dev.platform_data; |
2dc9215d | 812 | struct power_supply_config psy_cfg = {}; |
a7640bfa | 813 | int rc; |
bb879101 | 814 | int irq; |
a7640bfa | 815 | |
297d716f KK |
816 | sbs_desc = devm_kmemdup(&client->dev, &sbs_default_desc, |
817 | sizeof(*sbs_desc), GFP_KERNEL); | |
818 | if (!sbs_desc) | |
819 | return -ENOMEM; | |
820 | ||
821 | sbs_desc->name = devm_kasprintf(&client->dev, GFP_KERNEL, "sbs-%s", | |
822 | dev_name(&client->dev)); | |
823 | if (!sbs_desc->name) | |
a7640bfa | 824 | return -ENOMEM; |
52f56c69 RK |
825 | |
826 | chip = kzalloc(sizeof(struct sbs_info), GFP_KERNEL); | |
297d716f KK |
827 | if (!chip) |
828 | return -ENOMEM; | |
a7640bfa | 829 | |
3ddca062 RK |
830 | chip->client = client; |
831 | chip->enable_detection = false; | |
832 | chip->gpio_detect = false; | |
2dc9215d | 833 | psy_cfg.of_node = client->dev.of_node; |
297d716f | 834 | psy_cfg.drv_data = chip; |
58ddafae RK |
835 | /* ignore first notification of external change, it is generated |
836 | * from the power_supply_register call back | |
837 | */ | |
3ddca062 RK |
838 | chip->ignore_changes = 1; |
839 | chip->last_state = POWER_SUPPLY_STATUS_UNKNOWN; | |
a7640bfa | 840 | |
3ddca062 | 841 | pdata = sbs_of_populate_pdata(client); |
6c75ea1e | 842 | |
bb879101 | 843 | if (pdata) { |
3ddca062 RK |
844 | chip->gpio_detect = gpio_is_valid(pdata->battery_detect); |
845 | chip->pdata = pdata; | |
bb879101 RK |
846 | } |
847 | ||
3ddca062 | 848 | i2c_set_clientdata(client, chip); |
a7640bfa | 849 | |
3ddca062 | 850 | if (!chip->gpio_detect) |
bb879101 RK |
851 | goto skip_gpio; |
852 | ||
853 | rc = gpio_request(pdata->battery_detect, dev_name(&client->dev)); | |
854 | if (rc) { | |
855 | dev_warn(&client->dev, "Failed to request gpio: %d\n", rc); | |
3ddca062 | 856 | chip->gpio_detect = false; |
bb879101 RK |
857 | goto skip_gpio; |
858 | } | |
859 | ||
860 | rc = gpio_direction_input(pdata->battery_detect); | |
861 | if (rc) { | |
862 | dev_warn(&client->dev, "Failed to get gpio as input: %d\n", rc); | |
863 | gpio_free(pdata->battery_detect); | |
3ddca062 | 864 | chip->gpio_detect = false; |
bb879101 RK |
865 | goto skip_gpio; |
866 | } | |
867 | ||
868 | irq = gpio_to_irq(pdata->battery_detect); | |
869 | if (irq <= 0) { | |
870 | dev_warn(&client->dev, "Failed to get gpio as irq: %d\n", irq); | |
871 | gpio_free(pdata->battery_detect); | |
3ddca062 | 872 | chip->gpio_detect = false; |
bb879101 RK |
873 | goto skip_gpio; |
874 | } | |
875 | ||
3ddca062 | 876 | rc = request_irq(irq, sbs_irq, |
bb879101 | 877 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, |
297d716f | 878 | dev_name(&client->dev), chip->power_supply); |
bb879101 RK |
879 | if (rc) { |
880 | dev_warn(&client->dev, "Failed to request irq: %d\n", rc); | |
881 | gpio_free(pdata->battery_detect); | |
3ddca062 | 882 | chip->gpio_detect = false; |
bb879101 RK |
883 | goto skip_gpio; |
884 | } | |
885 | ||
3ddca062 | 886 | chip->irq = irq; |
bb879101 RK |
887 | |
888 | skip_gpio: | |
a22b41a3 | 889 | /* |
f4ed950a | 890 | * Before we register, we might need to make sure we can actually talk |
a22b41a3 OJ |
891 | * to the battery. |
892 | */ | |
f4ed950a FK |
893 | if (!force_load) { |
894 | rc = sbs_read_word_data(client, sbs_data[REG_STATUS].addr); | |
895 | ||
896 | if (rc < 0) { | |
897 | dev_err(&client->dev, "%s: Failed to get device status\n", | |
898 | __func__); | |
899 | goto exit_psupply; | |
900 | } | |
a22b41a3 | 901 | } |
bb879101 | 902 | |
297d716f KK |
903 | chip->power_supply = power_supply_register(&client->dev, sbs_desc, |
904 | &psy_cfg); | |
905 | if (IS_ERR(chip->power_supply)) { | |
a7640bfa RK |
906 | dev_err(&client->dev, |
907 | "%s: Failed to register power supply\n", __func__); | |
297d716f | 908 | rc = PTR_ERR(chip->power_supply); |
bb879101 | 909 | goto exit_psupply; |
a7640bfa RK |
910 | } |
911 | ||
912 | dev_info(&client->dev, | |
913 | "%s: battery gas gauge device registered\n", client->name); | |
914 | ||
3ddca062 | 915 | INIT_DELAYED_WORK(&chip->work, sbs_delayed_work); |
58ddafae | 916 | |
3ddca062 | 917 | chip->enable_detection = true; |
ee177d96 | 918 | |
a7640bfa | 919 | return 0; |
bb879101 RK |
920 | |
921 | exit_psupply: | |
3ddca062 | 922 | if (chip->irq) |
297d716f | 923 | free_irq(chip->irq, chip->power_supply); |
3ddca062 | 924 | if (chip->gpio_detect) |
bb879101 RK |
925 | gpio_free(pdata->battery_detect); |
926 | ||
3ddca062 | 927 | kfree(chip); |
bb879101 RK |
928 | |
929 | return rc; | |
a7640bfa RK |
930 | } |
931 | ||
415ec69f | 932 | static int sbs_remove(struct i2c_client *client) |
a7640bfa | 933 | { |
3ddca062 | 934 | struct sbs_info *chip = i2c_get_clientdata(client); |
a7640bfa | 935 | |
3ddca062 | 936 | if (chip->irq) |
297d716f | 937 | free_irq(chip->irq, chip->power_supply); |
3ddca062 RK |
938 | if (chip->gpio_detect) |
939 | gpio_free(chip->pdata->battery_detect); | |
bb879101 | 940 | |
297d716f | 941 | power_supply_unregister(chip->power_supply); |
58ddafae | 942 | |
3ddca062 | 943 | cancel_delayed_work_sync(&chip->work); |
58ddafae | 944 | |
3ddca062 RK |
945 | kfree(chip); |
946 | chip = NULL; | |
a7640bfa RK |
947 | |
948 | return 0; | |
949 | } | |
950 | ||
9c1d1af0 LPC |
951 | #if defined CONFIG_PM_SLEEP |
952 | ||
953 | static int sbs_suspend(struct device *dev) | |
a7640bfa | 954 | { |
9c1d1af0 | 955 | struct i2c_client *client = to_i2c_client(dev); |
3ddca062 | 956 | struct sbs_info *chip = i2c_get_clientdata(client); |
a7640bfa RK |
957 | s32 ret; |
958 | ||
3ddca062 RK |
959 | if (chip->poll_time > 0) |
960 | cancel_delayed_work_sync(&chip->work); | |
58ddafae | 961 | |
a7640bfa | 962 | /* write to manufacturer access with sleep command */ |
3ddca062 | 963 | ret = sbs_write_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr, |
a7640bfa | 964 | MANUFACTURER_ACCESS_SLEEP); |
3ddca062 | 965 | if (chip->is_present && ret < 0) |
d3ab61ec | 966 | return ret; |
a7640bfa RK |
967 | |
968 | return 0; | |
969 | } | |
9c1d1af0 LPC |
970 | |
971 | static SIMPLE_DEV_PM_OPS(sbs_pm_ops, sbs_suspend, NULL); | |
972 | #define SBS_PM_OPS (&sbs_pm_ops) | |
973 | ||
a7640bfa | 974 | #else |
9c1d1af0 | 975 | #define SBS_PM_OPS NULL |
a7640bfa | 976 | #endif |
a7640bfa | 977 | |
3ddca062 | 978 | static const struct i2c_device_id sbs_id[] = { |
a7640bfa | 979 | { "bq20z75", 0 }, |
3ddca062 | 980 | { "sbs-battery", 1 }, |
a7640bfa RK |
981 | {} |
982 | }; | |
3ddca062 RK |
983 | MODULE_DEVICE_TABLE(i2c, sbs_id); |
984 | ||
985 | static struct i2c_driver sbs_battery_driver = { | |
986 | .probe = sbs_probe, | |
28ea73f4 | 987 | .remove = sbs_remove, |
3ddca062 | 988 | .id_table = sbs_id, |
a7640bfa | 989 | .driver = { |
3ddca062 | 990 | .name = "sbs-battery", |
075ed03c | 991 | .of_match_table = of_match_ptr(sbs_dt_ids), |
9c1d1af0 | 992 | .pm = SBS_PM_OPS, |
a7640bfa RK |
993 | }, |
994 | }; | |
5ff92e7a | 995 | module_i2c_driver(sbs_battery_driver); |
a7640bfa | 996 | |
3ddca062 | 997 | MODULE_DESCRIPTION("SBS battery monitor driver"); |
a7640bfa | 998 | MODULE_LICENSE("GPL"); |
f4ed950a FK |
999 | |
1000 | module_param(force_load, bool, S_IRUSR | S_IRGRP | S_IROTH); | |
1001 | MODULE_PARM_DESC(force_load, | |
1002 | "Attempt to load the driver even if no battery is connected"); |