1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver |
4 | * |
5 | * Copyright (C) 2020-2021 Andrejus Basovas <xxx@yyy.tld> |
6 | * Copyright (C) 2016-2021 Hans de Goede <hdegoede@redhat.com> |
7 | * Copyright (C) 2014 Intel Corporation |
8 | * |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
10 | */ |
11 | |
12 | #include <linux/acpi.h> |
13 | #include <linux/dmi.h> |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> |
16 | #include <linux/device.h> |
17 | #include <linux/regmap.h> |
18 | #include <linux/jiffies.h> |
19 | #include <linux/interrupt.h> |
20 | #include <linux/mfd/axp20x.h> |
21 | #include <linux/platform_device.h> |
22 | #include <linux/power_supply.h> |
23 | #include <linux/iio/consumer.h> |
24 | #include <asm/unaligned.h> |
25 | #include <asm/iosf_mbi.h> |
26 | |
27 | #define PS_STAT_VBUS_TRIGGER (1 << 0) |
28 | #define PS_STAT_BAT_CHRG_DIR (1 << 2) |
29 | #define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3) |
30 | #define PS_STAT_VBUS_VALID (1 << 4) |
31 | #define PS_STAT_VBUS_PRESENT (1 << 5) |
32 | |
33 | #define CHRG_STAT_BAT_SAFE_MODE (1 << 3) |
34 | #define CHRG_STAT_BAT_VALID (1 << 4) |
35 | #define CHRG_STAT_BAT_PRESENT (1 << 5) |
36 | #define CHRG_STAT_CHARGING (1 << 6) |
37 | #define CHRG_STAT_PMIC_OTP (1 << 7) |
38 | |
39 | #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */ |
40 | #define CHRG_CCCV_CC_BIT_POS 0 |
41 | #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */ |
42 | #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */ |
43 | #define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */ |
44 | #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */ |
45 | #define CHRG_CCCV_CV_BIT_POS 5 |
46 | #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */ |
47 | #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */ |
48 | #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */ |
49 | #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */ |
50 | #define CHRG_CCCV_CHG_EN (1 << 7) |
51 | |
52 | #define FG_CNTL_OCV_ADJ_STAT (1 << 2) |
53 | #define FG_CNTL_OCV_ADJ_EN (1 << 3) |
54 | #define FG_CNTL_CAP_ADJ_STAT (1 << 4) |
55 | #define FG_CNTL_CAP_ADJ_EN (1 << 5) |
56 | #define FG_CNTL_CC_EN (1 << 6) |
57 | #define FG_CNTL_GAUGE_EN (1 << 7) |
58 | |
59 | #define FG_15BIT_WORD_VALID (1 << 15) |
60 | #define FG_15BIT_VAL_MASK 0x7fff |
61 | |
62 | #define FG_REP_CAP_VALID (1 << 7) |
63 | #define FG_REP_CAP_VAL_MASK 0x7F |
64 | |
65 | #define FG_DES_CAP1_VALID (1 << 7) |
66 | #define FG_DES_CAP_RES_LSB 1456 /* 1.456mAhr */ |
67 | |
68 | #define FG_DES_CC_RES_LSB 1456 /* 1.456mAhr */ |
69 | |
70 | #define FG_OCV_CAP_VALID (1 << 7) |
71 | #define FG_OCV_CAP_VAL_MASK 0x7F |
72 | #define FG_CC_CAP_VALID (1 << 7) |
73 | #define FG_CC_CAP_VAL_MASK 0x7F |
74 | |
75 | #define FG_LOW_CAP_THR1_MASK 0xf0 /* 5% tp 20% */ |
76 | #define FG_LOW_CAP_THR1_VAL 0xa0 /* 15 perc */ |
77 | #define FG_LOW_CAP_THR2_MASK 0x0f /* 0% to 15% */ |
78 | #define FG_LOW_CAP_WARN_THR 14 /* 14 perc */ |
79 | #define FG_LOW_CAP_CRIT_THR 4 /* 4 perc */ |
80 | #define FG_LOW_CAP_SHDN_THR 0 /* 0 perc */ |
81 | |
82 | #define DEV_NAME "axp288_fuel_gauge" |
83 | |
84 | /* 1.1mV per LSB expressed in uV */ |
85 | #define VOLTAGE_FROM_ADC(a) ((a * 11) / 10) |
86 | /* properties converted to uV, uA */ |
87 | #define PROP_VOLT(a) ((a) * 1000) |
88 | #define PROP_CURR(a) ((a) * 1000) |
89 | |
90 | #define AXP288_REG_UPDATE_INTERVAL (60 * HZ) |
91 | #define AXP288_FG_INTR_NUM 6 |
92 | |
93 | #define AXP288_QUIRK_NO_BATTERY BIT(0) |
94 | |
95 | static bool no_current_sense_res; |
96 | module_param(no_current_sense_res, bool, 0444); |
97 | MODULE_PARM_DESC(no_current_sense_res, "No (or broken) current sense resistor" ); |
98 | |
99 | enum { |
100 | QWBTU_IRQ = 0, |
101 | WBTU_IRQ, |
102 | QWBTO_IRQ, |
103 | WBTO_IRQ, |
104 | WL2_IRQ, |
105 | WL1_IRQ, |
106 | }; |
107 | |
108 | enum { |
109 | BAT_CHRG_CURR, |
110 | BAT_D_CURR, |
111 | BAT_VOLT, |
112 | IIO_CHANNEL_NUM |
113 | }; |
114 | |
115 | struct axp288_fg_info { |
116 | struct device *dev; |
117 | struct regmap *regmap; |
118 | int irq[AXP288_FG_INTR_NUM]; |
119 | struct iio_channel *iio_channel[IIO_CHANNEL_NUM]; |
120 | struct power_supply *bat; |
121 | struct mutex lock; |
122 | int status; |
123 | int max_volt; |
124 | int pwr_op; |
125 | int low_cap; |
126 | struct dentry *debug_file; |
127 | |
128 | char valid; /* zero until following fields are valid */ |
129 | unsigned long last_updated; /* in jiffies */ |
130 | |
131 | int pwr_stat; |
132 | int fg_res; |
133 | int bat_volt; |
134 | int d_curr; |
135 | int c_curr; |
136 | int ocv; |
137 | int fg_cc_mtr1; |
138 | int fg_des_cap1; |
139 | }; |
140 | |
141 | static enum power_supply_property fuel_gauge_props[] = { |
142 | POWER_SUPPLY_PROP_STATUS, |
143 | POWER_SUPPLY_PROP_PRESENT, |
144 | POWER_SUPPLY_PROP_HEALTH, |
145 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, |
146 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
147 | POWER_SUPPLY_PROP_VOLTAGE_OCV, |
148 | POWER_SUPPLY_PROP_CAPACITY, |
149 | POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, |
150 | POWER_SUPPLY_PROP_TECHNOLOGY, |
151 | /* The 3 props below are not used when no_current_sense_res is set */ |
152 | POWER_SUPPLY_PROP_CHARGE_FULL, |
153 | POWER_SUPPLY_PROP_CHARGE_NOW, |
154 | POWER_SUPPLY_PROP_CURRENT_NOW, |
155 | }; |
156 | |
157 | static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg) |
158 | { |
159 | unsigned int val; |
160 | int ret; |
161 | |
162 | ret = regmap_read(map: info->regmap, reg, val: &val); |
163 | if (ret < 0) { |
164 | dev_err(info->dev, "Error reading reg 0x%02x err: %d\n" , reg, ret); |
165 | return ret; |
166 | } |
167 | |
168 | return val; |
169 | } |
170 | |
171 | static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val) |
172 | { |
173 | int ret; |
174 | |
175 | ret = regmap_write(map: info->regmap, reg, val: (unsigned int)val); |
176 | |
177 | if (ret < 0) |
178 | dev_err(info->dev, "Error writing reg 0x%02x err: %d\n" , reg, ret); |
179 | |
180 | return ret; |
181 | } |
182 | |
183 | static int fuel_gauge_read_15bit_word(struct axp288_fg_info *info, int reg) |
184 | { |
185 | unsigned char buf[2]; |
186 | int ret; |
187 | |
188 | ret = regmap_bulk_read(map: info->regmap, reg, val: buf, val_count: 2); |
189 | if (ret < 0) { |
190 | dev_err(info->dev, "Error reading reg 0x%02x err: %d\n" , reg, ret); |
191 | return ret; |
192 | } |
193 | |
194 | ret = get_unaligned_be16(p: buf); |
195 | if (!(ret & FG_15BIT_WORD_VALID)) { |
196 | dev_err(info->dev, "Error reg 0x%02x contents not valid\n" , reg); |
197 | return -ENXIO; |
198 | } |
199 | |
200 | return ret & FG_15BIT_VAL_MASK; |
201 | } |
202 | |
203 | static int fuel_gauge_read_12bit_word(struct axp288_fg_info *info, int reg) |
204 | { |
205 | unsigned char buf[2]; |
206 | int ret; |
207 | |
208 | ret = regmap_bulk_read(map: info->regmap, reg, val: buf, val_count: 2); |
209 | if (ret < 0) { |
210 | dev_err(info->dev, "Error reading reg 0x%02x err: %d\n" , reg, ret); |
211 | return ret; |
212 | } |
213 | |
214 | /* 12-bit data values have upper 8 bits in buf[0], lower 4 in buf[1] */ |
215 | return (buf[0] << 4) | ((buf[1] >> 4) & 0x0f); |
216 | } |
217 | |
218 | static int fuel_gauge_update_registers(struct axp288_fg_info *info) |
219 | { |
220 | int ret; |
221 | |
222 | if (info->valid && time_before(jiffies, info->last_updated + AXP288_REG_UPDATE_INTERVAL)) |
223 | return 0; |
224 | |
225 | dev_dbg(info->dev, "Fuel Gauge updating register values...\n" ); |
226 | |
227 | ret = iosf_mbi_block_punit_i2c_access(); |
228 | if (ret < 0) |
229 | return ret; |
230 | |
231 | ret = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS); |
232 | if (ret < 0) |
233 | goto out; |
234 | info->pwr_stat = ret; |
235 | |
236 | if (no_current_sense_res) |
237 | ret = fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG); |
238 | else |
239 | ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES); |
240 | if (ret < 0) |
241 | goto out; |
242 | info->fg_res = ret; |
243 | |
244 | ret = iio_read_channel_raw(chan: info->iio_channel[BAT_VOLT], val: &info->bat_volt); |
245 | if (ret < 0) |
246 | goto out; |
247 | |
248 | ret = fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG); |
249 | if (ret < 0) |
250 | goto out; |
251 | info->ocv = ret; |
252 | |
253 | if (no_current_sense_res) |
254 | goto out_no_current_sense_res; |
255 | |
256 | if (info->pwr_stat & PS_STAT_BAT_CHRG_DIR) { |
257 | info->d_curr = 0; |
258 | ret = iio_read_channel_raw(chan: info->iio_channel[BAT_CHRG_CURR], val: &info->c_curr); |
259 | if (ret < 0) |
260 | goto out; |
261 | } else { |
262 | info->c_curr = 0; |
263 | ret = iio_read_channel_raw(chan: info->iio_channel[BAT_D_CURR], val: &info->d_curr); |
264 | if (ret < 0) |
265 | goto out; |
266 | } |
267 | |
268 | ret = fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG); |
269 | if (ret < 0) |
270 | goto out; |
271 | info->fg_cc_mtr1 = ret; |
272 | |
273 | ret = fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG); |
274 | if (ret < 0) |
275 | goto out; |
276 | info->fg_des_cap1 = ret; |
277 | |
278 | out_no_current_sense_res: |
279 | info->last_updated = jiffies; |
280 | info->valid = 1; |
281 | ret = 0; |
282 | out: |
283 | iosf_mbi_unblock_punit_i2c_access(); |
284 | return ret; |
285 | } |
286 | |
287 | static void fuel_gauge_get_status(struct axp288_fg_info *info) |
288 | { |
289 | int pwr_stat = info->pwr_stat; |
290 | int fg_res = info->fg_res; |
291 | int curr = info->d_curr; |
292 | |
293 | /* Report full if Vbus is valid and the reported capacity is 100% */ |
294 | if (!(pwr_stat & PS_STAT_VBUS_VALID)) |
295 | goto not_full; |
296 | |
297 | if (!(fg_res & FG_REP_CAP_VALID)) |
298 | goto not_full; |
299 | |
300 | fg_res &= ~FG_REP_CAP_VALID; |
301 | if (fg_res == 100) { |
302 | info->status = POWER_SUPPLY_STATUS_FULL; |
303 | return; |
304 | } |
305 | |
306 | /* |
307 | * Sometimes the charger turns itself off before fg-res reaches 100%. |
308 | * When this happens the AXP288 reports a not-charging status and |
309 | * 0 mA discharge current. |
310 | */ |
311 | if (fg_res < 90 || (pwr_stat & PS_STAT_BAT_CHRG_DIR) || no_current_sense_res) |
312 | goto not_full; |
313 | |
314 | if (curr == 0) { |
315 | info->status = POWER_SUPPLY_STATUS_FULL; |
316 | return; |
317 | } |
318 | |
319 | not_full: |
320 | if (pwr_stat & PS_STAT_BAT_CHRG_DIR) |
321 | info->status = POWER_SUPPLY_STATUS_CHARGING; |
322 | else |
323 | info->status = POWER_SUPPLY_STATUS_DISCHARGING; |
324 | } |
325 | |
326 | static int fuel_gauge_battery_health(struct axp288_fg_info *info) |
327 | { |
328 | int vocv = VOLTAGE_FROM_ADC(info->ocv); |
329 | int health = POWER_SUPPLY_HEALTH_UNKNOWN; |
330 | |
331 | if (vocv > info->max_volt) |
332 | health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
333 | else |
334 | health = POWER_SUPPLY_HEALTH_GOOD; |
335 | |
336 | return health; |
337 | } |
338 | |
339 | static int fuel_gauge_get_property(struct power_supply *ps, |
340 | enum power_supply_property prop, |
341 | union power_supply_propval *val) |
342 | { |
343 | struct axp288_fg_info *info = power_supply_get_drvdata(psy: ps); |
344 | int ret, value; |
345 | |
346 | mutex_lock(&info->lock); |
347 | |
348 | ret = fuel_gauge_update_registers(info); |
349 | if (ret < 0) |
350 | goto out; |
351 | |
352 | switch (prop) { |
353 | case POWER_SUPPLY_PROP_STATUS: |
354 | fuel_gauge_get_status(info); |
355 | val->intval = info->status; |
356 | break; |
357 | case POWER_SUPPLY_PROP_HEALTH: |
358 | val->intval = fuel_gauge_battery_health(info); |
359 | break; |
360 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
361 | value = VOLTAGE_FROM_ADC(info->bat_volt); |
362 | val->intval = PROP_VOLT(value); |
363 | break; |
364 | case POWER_SUPPLY_PROP_VOLTAGE_OCV: |
365 | value = VOLTAGE_FROM_ADC(info->ocv); |
366 | val->intval = PROP_VOLT(value); |
367 | break; |
368 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
369 | if (info->d_curr > 0) |
370 | value = -1 * info->d_curr; |
371 | else |
372 | value = info->c_curr; |
373 | |
374 | val->intval = PROP_CURR(value); |
375 | break; |
376 | case POWER_SUPPLY_PROP_PRESENT: |
377 | if (info->pwr_op & CHRG_STAT_BAT_PRESENT) |
378 | val->intval = 1; |
379 | else |
380 | val->intval = 0; |
381 | break; |
382 | case POWER_SUPPLY_PROP_CAPACITY: |
383 | if (!(info->fg_res & FG_REP_CAP_VALID)) |
384 | dev_err(info->dev, "capacity measurement not valid\n" ); |
385 | val->intval = (info->fg_res & FG_REP_CAP_VAL_MASK); |
386 | break; |
387 | case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: |
388 | val->intval = (info->low_cap & 0x0f); |
389 | break; |
390 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
391 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
392 | break; |
393 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
394 | val->intval = info->fg_cc_mtr1 * FG_DES_CAP_RES_LSB; |
395 | break; |
396 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
397 | val->intval = info->fg_des_cap1 * FG_DES_CAP_RES_LSB; |
398 | break; |
399 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
400 | val->intval = PROP_VOLT(info->max_volt); |
401 | break; |
402 | default: |
403 | ret = -EINVAL; |
404 | } |
405 | |
406 | out: |
407 | mutex_unlock(lock: &info->lock); |
408 | return ret; |
409 | } |
410 | |
411 | static int fuel_gauge_set_property(struct power_supply *ps, |
412 | enum power_supply_property prop, |
413 | const union power_supply_propval *val) |
414 | { |
415 | struct axp288_fg_info *info = power_supply_get_drvdata(psy: ps); |
416 | int new_low_cap, ret = 0; |
417 | |
418 | mutex_lock(&info->lock); |
419 | switch (prop) { |
420 | case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: |
421 | if ((val->intval < 0) || (val->intval > 15)) { |
422 | ret = -EINVAL; |
423 | break; |
424 | } |
425 | new_low_cap = info->low_cap; |
426 | new_low_cap &= 0xf0; |
427 | new_low_cap |= (val->intval & 0xf); |
428 | ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, val: new_low_cap); |
429 | if (ret == 0) |
430 | info->low_cap = new_low_cap; |
431 | break; |
432 | default: |
433 | ret = -EINVAL; |
434 | break; |
435 | } |
436 | |
437 | mutex_unlock(lock: &info->lock); |
438 | return ret; |
439 | } |
440 | |
441 | static int fuel_gauge_property_is_writeable(struct power_supply *psy, |
442 | enum power_supply_property psp) |
443 | { |
444 | int ret; |
445 | |
446 | switch (psp) { |
447 | case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: |
448 | ret = 1; |
449 | break; |
450 | default: |
451 | ret = 0; |
452 | } |
453 | |
454 | return ret; |
455 | } |
456 | |
457 | static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev) |
458 | { |
459 | struct axp288_fg_info *info = dev; |
460 | int i; |
461 | |
462 | for (i = 0; i < AXP288_FG_INTR_NUM; i++) { |
463 | if (info->irq[i] == irq) |
464 | break; |
465 | } |
466 | |
467 | if (i >= AXP288_FG_INTR_NUM) { |
468 | dev_warn(info->dev, "spurious interrupt!!\n" ); |
469 | return IRQ_NONE; |
470 | } |
471 | |
472 | switch (i) { |
473 | case QWBTU_IRQ: |
474 | dev_info(info->dev, "Quit Battery under temperature in work mode IRQ (QWBTU)\n" ); |
475 | break; |
476 | case WBTU_IRQ: |
477 | dev_info(info->dev, "Battery under temperature in work mode IRQ (WBTU)\n" ); |
478 | break; |
479 | case QWBTO_IRQ: |
480 | dev_info(info->dev, "Quit Battery over temperature in work mode IRQ (QWBTO)\n" ); |
481 | break; |
482 | case WBTO_IRQ: |
483 | dev_info(info->dev, "Battery over temperature in work mode IRQ (WBTO)\n" ); |
484 | break; |
485 | case WL2_IRQ: |
486 | dev_info(info->dev, "Low Batt Warning(2) INTR\n" ); |
487 | break; |
488 | case WL1_IRQ: |
489 | dev_info(info->dev, "Low Batt Warning(1) INTR\n" ); |
490 | break; |
491 | default: |
492 | dev_warn(info->dev, "Spurious Interrupt!!!\n" ); |
493 | } |
494 | |
495 | mutex_lock(&info->lock); |
496 | info->valid = 0; /* Force updating of the cached registers */ |
497 | mutex_unlock(lock: &info->lock); |
498 | |
499 | power_supply_changed(psy: info->bat); |
500 | return IRQ_HANDLED; |
501 | } |
502 | |
503 | static void fuel_gauge_external_power_changed(struct power_supply *psy) |
504 | { |
505 | struct axp288_fg_info *info = power_supply_get_drvdata(psy); |
506 | |
507 | mutex_lock(&info->lock); |
508 | info->valid = 0; /* Force updating of the cached registers */ |
509 | mutex_unlock(lock: &info->lock); |
510 | power_supply_changed(psy); |
511 | } |
512 | |
513 | static struct power_supply_desc fuel_gauge_desc = { |
514 | .name = DEV_NAME, |
515 | .type = POWER_SUPPLY_TYPE_BATTERY, |
516 | .properties = fuel_gauge_props, |
517 | .num_properties = ARRAY_SIZE(fuel_gauge_props), |
518 | .get_property = fuel_gauge_get_property, |
519 | .set_property = fuel_gauge_set_property, |
520 | .property_is_writeable = fuel_gauge_property_is_writeable, |
521 | .external_power_changed = fuel_gauge_external_power_changed, |
522 | }; |
523 | |
524 | /* |
525 | * Some devices have no battery (HDMI sticks) and the axp288 battery's |
526 | * detection reports one despite it not being there. |
527 | * Please keep this listed sorted alphabetically. |
528 | */ |
529 | static const struct dmi_system_id axp288_quirks[] = { |
530 | { |
531 | /* ACEPC T8 Cherry Trail Z8350 mini PC */ |
532 | .matches = { |
533 | DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M." ), |
534 | DMI_EXACT_MATCH(DMI_BOARD_NAME, "Cherry Trail CR" ), |
535 | DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "T8" ), |
536 | /* also match on somewhat unique bios-version */ |
537 | DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1.000" ), |
538 | }, |
539 | .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, |
540 | }, |
541 | { |
542 | /* ACEPC T11 Cherry Trail Z8350 mini PC */ |
543 | .matches = { |
544 | DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M." ), |
545 | DMI_EXACT_MATCH(DMI_BOARD_NAME, "Cherry Trail CR" ), |
546 | DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "T11" ), |
547 | /* also match on somewhat unique bios-version */ |
548 | DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1.000" ), |
549 | }, |
550 | .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, |
551 | }, |
552 | { |
553 | /* Intel Bay Trail Compute Stick */ |
554 | .matches = { |
555 | DMI_MATCH(DMI_SYS_VENDOR, "Intel" ), |
556 | /* Partial match for STCK1A32WFC STCK1A32FC, STCK1A8LFC variants */ |
557 | DMI_MATCH(DMI_PRODUCT_NAME, "STCK1A" ), |
558 | }, |
559 | .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, |
560 | }, |
561 | { |
562 | /* Intel Cherry Trail Compute Stick */ |
563 | .matches = { |
564 | DMI_MATCH(DMI_SYS_VENDOR, "Intel" ), |
565 | /* Partial match for STK1AW32SC and STK1A32SC variants */ |
566 | DMI_MATCH(DMI_PRODUCT_NAME, "STK1A" ), |
567 | }, |
568 | .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, |
569 | }, |
570 | { |
571 | /* Meegopad T02 */ |
572 | .matches = { |
573 | DMI_MATCH(DMI_PRODUCT_NAME, "MEEGOPAD T02" ), |
574 | }, |
575 | .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, |
576 | }, |
577 | { /* Mele PCG03 Mini PC */ |
578 | .matches = { |
579 | DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "Mini PC" ), |
580 | DMI_EXACT_MATCH(DMI_BOARD_NAME, "Mini PC" ), |
581 | }, |
582 | .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, |
583 | }, |
584 | { |
585 | /* Minix Neo Z83-4 mini PC */ |
586 | .matches = { |
587 | DMI_MATCH(DMI_SYS_VENDOR, "MINIX" ), |
588 | DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4" ), |
589 | }, |
590 | .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, |
591 | }, |
592 | { |
593 | /* |
594 | * One Mix 1, this uses the "T3 MRD" boardname used by |
595 | * generic mini PCs, but it is a mini laptop so it does |
596 | * actually have a battery! |
597 | */ |
598 | .matches = { |
599 | DMI_MATCH(DMI_BOARD_NAME, "T3 MRD" ), |
600 | DMI_MATCH(DMI_BIOS_DATE, "06/14/2018" ), |
601 | }, |
602 | .driver_data = NULL, |
603 | }, |
604 | { |
605 | /* Radxa ROCK Pi X Single Board Computer */ |
606 | .matches = { |
607 | DMI_MATCH(DMI_BOARD_NAME, "ROCK Pi X" ), |
608 | DMI_MATCH(DMI_BOARD_VENDOR, "Radxa" ), |
609 | }, |
610 | .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, |
611 | }, |
612 | { |
613 | /* |
614 | * Various Ace PC/Meegopad/MinisForum/Wintel Mini-PCs/HDMI-sticks |
615 | * This entry must be last because it is generic, this allows |
616 | * adding more specifuc quirks overriding this generic entry. |
617 | */ |
618 | .matches = { |
619 | DMI_MATCH(DMI_BOARD_NAME, "T3 MRD" ), |
620 | DMI_MATCH(DMI_CHASSIS_TYPE, "3" ), |
621 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc." ), |
622 | }, |
623 | .driver_data = (void *)AXP288_QUIRK_NO_BATTERY, |
624 | }, |
625 | {} |
626 | }; |
627 | |
628 | static int axp288_fuel_gauge_read_initial_regs(struct axp288_fg_info *info) |
629 | { |
630 | unsigned int val; |
631 | int ret; |
632 | |
633 | /* |
634 | * On some devices the fuelgauge and charger parts of the axp288 are |
635 | * not used, check that the fuelgauge is enabled (CC_CTRL != 0). |
636 | */ |
637 | ret = regmap_read(map: info->regmap, AXP20X_CC_CTRL, val: &val); |
638 | if (ret < 0) |
639 | return ret; |
640 | if (val == 0) |
641 | return -ENODEV; |
642 | |
643 | ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); |
644 | if (ret < 0) |
645 | return ret; |
646 | |
647 | if (!(ret & FG_DES_CAP1_VALID)) { |
648 | dev_err(info->dev, "axp288 not configured by firmware\n" ); |
649 | return -ENODEV; |
650 | } |
651 | |
652 | ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1); |
653 | if (ret < 0) |
654 | return ret; |
655 | switch ((ret & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS) { |
656 | case CHRG_CCCV_CV_4100MV: |
657 | info->max_volt = 4100; |
658 | break; |
659 | case CHRG_CCCV_CV_4150MV: |
660 | info->max_volt = 4150; |
661 | break; |
662 | case CHRG_CCCV_CV_4200MV: |
663 | info->max_volt = 4200; |
664 | break; |
665 | case CHRG_CCCV_CV_4350MV: |
666 | info->max_volt = 4350; |
667 | break; |
668 | } |
669 | |
670 | ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE); |
671 | if (ret < 0) |
672 | return ret; |
673 | info->pwr_op = ret; |
674 | |
675 | ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG); |
676 | if (ret < 0) |
677 | return ret; |
678 | info->low_cap = ret; |
679 | |
680 | return 0; |
681 | } |
682 | |
683 | static void axp288_fuel_gauge_release_iio_chans(void *data) |
684 | { |
685 | struct axp288_fg_info *info = data; |
686 | int i; |
687 | |
688 | for (i = 0; i < IIO_CHANNEL_NUM; i++) |
689 | if (!IS_ERR_OR_NULL(ptr: info->iio_channel[i])) |
690 | iio_channel_release(chan: info->iio_channel[i]); |
691 | } |
692 | |
693 | static int axp288_fuel_gauge_probe(struct platform_device *pdev) |
694 | { |
695 | struct axp288_fg_info *info; |
696 | struct axp20x_dev *axp20x = dev_get_drvdata(dev: pdev->dev.parent); |
697 | struct power_supply_config psy_cfg = {}; |
698 | static const char * const iio_chan_name[] = { |
699 | [BAT_CHRG_CURR] = "axp288-chrg-curr" , |
700 | [BAT_D_CURR] = "axp288-chrg-d-curr" , |
701 | [BAT_VOLT] = "axp288-batt-volt" , |
702 | }; |
703 | const struct dmi_system_id *dmi_id; |
704 | struct device *dev = &pdev->dev; |
705 | unsigned long quirks = 0; |
706 | int i, pirq, ret; |
707 | |
708 | /* |
709 | * Normally the native AXP288 fg/charger drivers are preferred but |
710 | * on some devices the ACPI drivers should be used instead. |
711 | */ |
712 | if (!acpi_quirk_skip_acpi_ac_and_battery()) |
713 | return -ENODEV; |
714 | |
715 | dmi_id = dmi_first_match(list: axp288_quirks); |
716 | if (dmi_id) |
717 | quirks = (unsigned long)dmi_id->driver_data; |
718 | |
719 | if (quirks & AXP288_QUIRK_NO_BATTERY) |
720 | return -ENODEV; |
721 | |
722 | info = devm_kzalloc(dev, size: sizeof(*info), GFP_KERNEL); |
723 | if (!info) |
724 | return -ENOMEM; |
725 | |
726 | info->dev = dev; |
727 | info->regmap = axp20x->regmap; |
728 | info->status = POWER_SUPPLY_STATUS_UNKNOWN; |
729 | info->valid = 0; |
730 | |
731 | platform_set_drvdata(pdev, data: info); |
732 | |
733 | mutex_init(&info->lock); |
734 | |
735 | for (i = 0; i < AXP288_FG_INTR_NUM; i++) { |
736 | pirq = platform_get_irq(pdev, i); |
737 | if (pirq < 0) |
738 | continue; |
739 | ret = regmap_irq_get_virq(data: axp20x->regmap_irqc, irq: pirq); |
740 | if (ret < 0) |
741 | return dev_err_probe(dev, err: ret, fmt: "getting vIRQ %d\n" , pirq); |
742 | |
743 | info->irq[i] = ret; |
744 | } |
745 | |
746 | for (i = 0; i < IIO_CHANNEL_NUM; i++) { |
747 | /* |
748 | * Note cannot use devm_iio_channel_get because x86 systems |
749 | * lack the device<->channel maps which iio_channel_get will |
750 | * try to use when passed a non NULL device pointer. |
751 | */ |
752 | info->iio_channel[i] = |
753 | iio_channel_get(NULL, consumer_channel: iio_chan_name[i]); |
754 | if (IS_ERR(ptr: info->iio_channel[i])) { |
755 | ret = PTR_ERR(ptr: info->iio_channel[i]); |
756 | dev_dbg(dev, "error getting iiochan %s: %d\n" , iio_chan_name[i], ret); |
757 | /* Wait for axp288_adc to load */ |
758 | if (ret == -ENODEV) |
759 | ret = -EPROBE_DEFER; |
760 | |
761 | axp288_fuel_gauge_release_iio_chans(data: info); |
762 | return ret; |
763 | } |
764 | } |
765 | |
766 | ret = devm_add_action_or_reset(dev, axp288_fuel_gauge_release_iio_chans, info); |
767 | if (ret) |
768 | return ret; |
769 | |
770 | ret = iosf_mbi_block_punit_i2c_access(); |
771 | if (ret < 0) |
772 | return ret; |
773 | |
774 | ret = axp288_fuel_gauge_read_initial_regs(info); |
775 | iosf_mbi_unblock_punit_i2c_access(); |
776 | if (ret < 0) |
777 | return ret; |
778 | |
779 | psy_cfg.drv_data = info; |
780 | if (no_current_sense_res) |
781 | fuel_gauge_desc.num_properties = ARRAY_SIZE(fuel_gauge_props) - 3; |
782 | info->bat = devm_power_supply_register(parent: dev, desc: &fuel_gauge_desc, cfg: &psy_cfg); |
783 | if (IS_ERR(ptr: info->bat)) { |
784 | ret = PTR_ERR(ptr: info->bat); |
785 | dev_err(dev, "failed to register battery: %d\n" , ret); |
786 | return ret; |
787 | } |
788 | |
789 | for (i = 0; i < AXP288_FG_INTR_NUM; i++) { |
790 | ret = devm_request_threaded_irq(dev, irq: info->irq[i], NULL, |
791 | thread_fn: fuel_gauge_thread_handler, |
792 | IRQF_ONESHOT, DEV_NAME, dev_id: info); |
793 | if (ret) |
794 | return dev_err_probe(dev, err: ret, fmt: "requesting IRQ %d\n" , info->irq[i]); |
795 | } |
796 | |
797 | return 0; |
798 | } |
799 | |
800 | static const struct platform_device_id axp288_fg_id_table[] = { |
801 | { .name = DEV_NAME }, |
802 | {}, |
803 | }; |
804 | MODULE_DEVICE_TABLE(platform, axp288_fg_id_table); |
805 | |
806 | static struct platform_driver axp288_fuel_gauge_driver = { |
807 | .probe = axp288_fuel_gauge_probe, |
808 | .id_table = axp288_fg_id_table, |
809 | .driver = { |
810 | .name = DEV_NAME, |
811 | }, |
812 | }; |
813 | |
814 | module_platform_driver(axp288_fuel_gauge_driver); |
815 | |
816 | MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>" ); |
817 | MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>" ); |
818 | MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver" ); |
819 | MODULE_LICENSE("GPL" ); |
820 | |