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