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power_supply: charger-manager: Use power_supply_*() API for accessing function attrs
[linux-2.6-block.git] / drivers / power / axp288_fuel_gauge.c
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5a5bf490
TB		 1/*
2 * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver
3 *
4 * Copyright (C) 2014 Intel Corporation
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 */
18
19#include <linux/module.h>
20#include <linux/kernel.h>
21#include <linux/device.h>
22#include <linux/regmap.h>
23#include <linux/jiffies.h>
24#include <linux/interrupt.h>
25#include <linux/device.h>
26#include <linux/workqueue.h>
27#include <linux/mfd/axp20x.h>
28#include <linux/platform_device.h>
29#include <linux/power_supply.h>
30#include <linux/iio/consumer.h>
31#include <linux/debugfs.h>
32#include <linux/seq_file.h>
33
34#define CHRG_STAT_BAT_SAFE_MODE (1 << 3)
35#define CHRG_STAT_BAT_VALID (1 << 4)
36#define CHRG_STAT_BAT_PRESENT (1 << 5)
37#define CHRG_STAT_CHARGING (1 << 6)
38#define CHRG_STAT_PMIC_OTP (1 << 7)
39
40#define CHRG_CCCV_CC_MASK 0xf /* 4 bits */
41#define CHRG_CCCV_CC_BIT_POS 0
42#define CHRG_CCCV_CC_OFFSET 200 /* 200mA */
43#define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */
44#define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */
45#define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */
46#define CHRG_CCCV_CV_BIT_POS 5
47#define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */
48#define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */
49#define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */
50#define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */
51#define CHRG_CCCV_CHG_EN (1 << 7)
52
53#define CV_4100 4100 /* 4100mV */
54#define CV_4150 4150 /* 4150mV */
55#define CV_4200 4200 /* 4200mV */
56#define CV_4350 4350 /* 4350mV */
57
58#define TEMP_IRQ_CFG_QWBTU (1 << 0)
59#define TEMP_IRQ_CFG_WBTU (1 << 1)
60#define TEMP_IRQ_CFG_QWBTO (1 << 2)
61#define TEMP_IRQ_CFG_WBTO (1 << 3)
62#define TEMP_IRQ_CFG_MASK 0xf
63
64#define FG_IRQ_CFG_LOWBATT_WL2 (1 << 0)
65#define FG_IRQ_CFG_LOWBATT_WL1 (1 << 1)
66#define FG_IRQ_CFG_LOWBATT_MASK 0x3
67#define LOWBAT_IRQ_STAT_LOWBATT_WL2 (1 << 0)
68#define LOWBAT_IRQ_STAT_LOWBATT_WL1 (1 << 1)
69
70#define FG_CNTL_OCV_ADJ_STAT (1 << 2)
71#define FG_CNTL_OCV_ADJ_EN (1 << 3)
72#define FG_CNTL_CAP_ADJ_STAT (1 << 4)
73#define FG_CNTL_CAP_ADJ_EN (1 << 5)
74#define FG_CNTL_CC_EN (1 << 6)
75#define FG_CNTL_GAUGE_EN (1 << 7)
76
77#define FG_REP_CAP_VALID (1 << 7)
78#define FG_REP_CAP_VAL_MASK 0x7F
79
80#define FG_DES_CAP1_VALID (1 << 7)
81#define FG_DES_CAP1_VAL_MASK 0x7F
82#define FG_DES_CAP0_VAL_MASK 0xFF
83#define FG_DES_CAP_RES_LSB 1456 /* 1.456mAhr */
84
85#define FG_CC_MTR1_VALID (1 << 7)
86#define FG_CC_MTR1_VAL_MASK 0x7F
87#define FG_CC_MTR0_VAL_MASK 0xFF
88#define FG_DES_CC_RES_LSB 1456 /* 1.456mAhr */
89
90#define FG_OCV_CAP_VALID (1 << 7)
91#define FG_OCV_CAP_VAL_MASK 0x7F
92#define FG_CC_CAP_VALID (1 << 7)
93#define FG_CC_CAP_VAL_MASK 0x7F
94
95#define FG_LOW_CAP_THR1_MASK 0xf0 /* 5% tp 20% */
96#define FG_LOW_CAP_THR1_VAL 0xa0 /* 15 perc */
97#define FG_LOW_CAP_THR2_MASK 0x0f /* 0% to 15% */
98#define FG_LOW_CAP_WARN_THR 14 /* 14 perc */
99#define FG_LOW_CAP_CRIT_THR 4 /* 4 perc */
100#define FG_LOW_CAP_SHDN_THR 0 /* 0 perc */
101
102#define STATUS_MON_DELAY_JIFFIES (HZ * 60) /*60 sec */
103#define NR_RETRY_CNT 3
104#define DEV_NAME "axp288_fuel_gauge"
105
106/* 1.1mV per LSB expressed in uV */
107#define VOLTAGE_FROM_ADC(a) ((a * 11) / 10)
108/* properties converted to tenths of degrees, uV, uA, uW */
109#define PROP_TEMP(a) ((a) * 10)
110#define UNPROP_TEMP(a) ((a) / 10)
111#define PROP_VOLT(a) ((a) * 1000)
112#define PROP_CURR(a) ((a) * 1000)
113
114#define AXP288_FG_INTR_NUM 6
115enum {
116 QWBTU_IRQ = 0,
117 WBTU_IRQ,
118 QWBTO_IRQ,
119 WBTO_IRQ,
120 WL2_IRQ,
121 WL1_IRQ,
122};
123
124struct axp288_fg_info {
125 struct platform_device *pdev;
126 struct axp20x_fg_pdata *pdata;
127 struct regmap *regmap;
128 struct regmap_irq_chip_data *regmap_irqc;
129 int irq[AXP288_FG_INTR_NUM];
130 struct power_supply bat;
131 struct mutex lock;
132 int status;
133 struct delayed_work status_monitor;
134 struct dentry *debug_file;
135};
136
137static enum power_supply_property fuel_gauge_props[] = {
138 POWER_SUPPLY_PROP_STATUS,
139 POWER_SUPPLY_PROP_PRESENT,
140 POWER_SUPPLY_PROP_HEALTH,
141 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
142 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
143 POWER_SUPPLY_PROP_VOLTAGE_NOW,
144 POWER_SUPPLY_PROP_VOLTAGE_OCV,
145 POWER_SUPPLY_PROP_CURRENT_NOW,
146 POWER_SUPPLY_PROP_CAPACITY,
147 POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
148 POWER_SUPPLY_PROP_TEMP,
149 POWER_SUPPLY_PROP_TEMP_MAX,
150 POWER_SUPPLY_PROP_TEMP_MIN,
151 POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
152 POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
153 POWER_SUPPLY_PROP_TECHNOLOGY,
154 POWER_SUPPLY_PROP_CHARGE_FULL,
155 POWER_SUPPLY_PROP_CHARGE_NOW,
156 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
157 POWER_SUPPLY_PROP_MODEL_NAME,
158};
159
160static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg)
161{
162 int ret, i;
163 unsigned int val;
164
165 for (i = 0; i < NR_RETRY_CNT; i++) {
166 ret = regmap_read(info->regmap, reg, &val);
167 if (ret == -EBUSY)
168 continue;
169 else
170 break;
171 }
172
173 if (ret < 0)
174 dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", ret);
175
176 return val;
177}
178
179static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val)
180{
181 int ret;
182
183 ret = regmap_write(info->regmap, reg, (unsigned int)val);
184
185 if (ret < 0)
186 dev_err(&info->pdev->dev, "axp288 reg write err:%d\n", ret);
187
188 return ret;
189}
190
191static int pmic_read_adc_val(const char *name, int *raw_val,
192 struct axp288_fg_info *info)
193{
194 int ret, val = 0;
195 struct iio_channel *indio_chan;
196
197 indio_chan = iio_channel_get(NULL, name);
198 if (IS_ERR_OR_NULL(indio_chan)) {
199 ret = PTR_ERR(indio_chan);
200 goto exit;
201 }
202 ret = iio_read_channel_raw(indio_chan, &val);
203 if (ret < 0) {
204 dev_err(&info->pdev->dev,
205 "IIO channel read error: %x, %x\n", ret, val);
206 goto err_exit;
207 }
208
209 dev_dbg(&info->pdev->dev, "adc raw val=%x\n", val);
210 *raw_val = val;
211
212err_exit:
213 iio_channel_release(indio_chan);
214exit:
215 return ret;
216}
217
218#ifdef CONFIG_DEBUG_FS
219static int fuel_gauge_debug_show(struct seq_file *s, void *data)
220{
221 struct axp288_fg_info *info = s->private;
222 int raw_val, ret;
223
224 seq_printf(s, " PWR_STATUS[%02x] : %02x\n",
225 AXP20X_PWR_INPUT_STATUS,
226 fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS));
227 seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n",
228 AXP20X_PWR_OP_MODE,
229 fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE));
230 seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n",
231 AXP20X_CHRG_CTRL1,
232 fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1));
233 seq_printf(s, " VLTF[%02x] : %02x\n",
234 AXP20X_V_LTF_DISCHRG,
235 fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG));
236 seq_printf(s, " VHTF[%02x] : %02x\n",
237 AXP20X_V_HTF_DISCHRG,
238 fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG));
239 seq_printf(s, " CC_CTRL[%02x] : %02x\n",
240 AXP20X_CC_CTRL,
241 fuel_gauge_reg_readb(info, AXP20X_CC_CTRL));
242 seq_printf(s, "BATTERY CAP[%02x] : %02x\n",
243 AXP20X_FG_RES,
244 fuel_gauge_reg_readb(info, AXP20X_FG_RES));
245 seq_printf(s, " FG_RDC1[%02x] : %02x\n",
246 AXP288_FG_RDC1_REG,
247 fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG));
248 seq_printf(s, " FG_RDC0[%02x] : %02x\n",
249 AXP288_FG_RDC0_REG,
250 fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG));
251 seq_printf(s, " FG_OCVH[%02x] : %02x\n",
252 AXP288_FG_OCVH_REG,
253 fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG));
254 seq_printf(s, " FG_OCVL[%02x] : %02x\n",
255 AXP288_FG_OCVL_REG,
256 fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG));
257 seq_printf(s, "FG_DES_CAP1[%02x] : %02x\n",
258 AXP288_FG_DES_CAP1_REG,
259 fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG));
260 seq_printf(s, "FG_DES_CAP0[%02x] : %02x\n",
261 AXP288_FG_DES_CAP0_REG,
262 fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP0_REG));
263 seq_printf(s, " FG_CC_MTR1[%02x] : %02x\n",
264 AXP288_FG_CC_MTR1_REG,
265 fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR1_REG));
266 seq_printf(s, " FG_CC_MTR0[%02x] : %02x\n",
267 AXP288_FG_CC_MTR0_REG,
268 fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR0_REG));
269 seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n",
270 AXP288_FG_OCV_CAP_REG,
271 fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG));
272 seq_printf(s, " FG_CC_CAP[%02x] : %02x\n",
273 AXP288_FG_CC_CAP_REG,
274 fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG));
275 seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n",
276 AXP288_FG_LOW_CAP_REG,
277 fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG));
278 seq_printf(s, "TUNING_CTL0[%02x] : %02x\n",
279 AXP288_FG_TUNE0,
280 fuel_gauge_reg_readb(info, AXP288_FG_TUNE0));
281 seq_printf(s, "TUNING_CTL1[%02x] : %02x\n",
282 AXP288_FG_TUNE1,
283 fuel_gauge_reg_readb(info, AXP288_FG_TUNE1));
284 seq_printf(s, "TUNING_CTL2[%02x] : %02x\n",
285 AXP288_FG_TUNE2,
286 fuel_gauge_reg_readb(info, AXP288_FG_TUNE2));
287 seq_printf(s, "TUNING_CTL3[%02x] : %02x\n",
288 AXP288_FG_TUNE3,
289 fuel_gauge_reg_readb(info, AXP288_FG_TUNE3));
290 seq_printf(s, "TUNING_CTL4[%02x] : %02x\n",
291 AXP288_FG_TUNE4,
292 fuel_gauge_reg_readb(info, AXP288_FG_TUNE4));
293 seq_printf(s, "TUNING_CTL5[%02x] : %02x\n",
294 AXP288_FG_TUNE5,
295 fuel_gauge_reg_readb(info, AXP288_FG_TUNE5));
296
297 ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info);
298 if (ret >= 0)
299 seq_printf(s, "axp288-batttemp : %d\n", raw_val);
300 ret = pmic_read_adc_val("axp288-pmic-temp", &raw_val, info);
301 if (ret >= 0)
302 seq_printf(s, "axp288-pmictemp : %d\n", raw_val);
303 ret = pmic_read_adc_val("axp288-system-temp", &raw_val, info);
304 if (ret >= 0)
305 seq_printf(s, "axp288-systtemp : %d\n", raw_val);
306 ret = pmic_read_adc_val("axp288-chrg-curr", &raw_val, info);
307 if (ret >= 0)
308 seq_printf(s, "axp288-chrgcurr : %d\n", raw_val);
309 ret = pmic_read_adc_val("axp288-chrg-d-curr", &raw_val, info);
310 if (ret >= 0)
311 seq_printf(s, "axp288-dchrgcur : %d\n", raw_val);
312 ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
313 if (ret >= 0)
314 seq_printf(s, "axp288-battvolt : %d\n", raw_val);
315
316 return 0;
317}
318
319static int debug_open(struct inode *inode, struct file *file)
320{
321 return single_open(file, fuel_gauge_debug_show, inode->i_private);
322}
323
324static const struct file_operations fg_debug_fops = {
325 .open = debug_open,
326 .read = seq_read,
327 .llseek = seq_lseek,
328 .release = single_release,
329};
330
331static void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
332{
333 info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL,
334 info, &fg_debug_fops);
335}
336
337static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
338{
339 debugfs_remove(info->debug_file);
340}
341#else
342static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
343{
344}
345static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
346{
347}
348#endif
349
350static void fuel_gauge_get_status(struct axp288_fg_info *info)
351{
352 int pwr_stat, ret;
353 int charge, discharge;
354
355 pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS);
356 if (pwr_stat < 0) {
357 dev_err(&info->pdev->dev,
358 "PWR STAT read failed:%d\n", pwr_stat);
359 return;
360 }
361 ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
362 if (ret < 0) {
363 dev_err(&info->pdev->dev,
364 "ADC charge current read failed:%d\n", ret);
365 return;
366 }
367 ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
368 if (ret < 0) {
369 dev_err(&info->pdev->dev,
370 "ADC discharge current read failed:%d\n", ret);
371 return;
372 }
373
374 if (charge > 0)
375 info->status = POWER_SUPPLY_STATUS_CHARGING;
376 else if (discharge > 0)
377 info->status = POWER_SUPPLY_STATUS_DISCHARGING;
378 else {
379 if (pwr_stat & CHRG_STAT_BAT_PRESENT)
380 info->status = POWER_SUPPLY_STATUS_FULL;
381 else
382 info->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
383 }
384}
385
386static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt)
387{
388 int ret = 0, raw_val;
389
390 ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info);
391 if (ret < 0)
392 goto vbatt_read_fail;
393
394 *vbatt = VOLTAGE_FROM_ADC(raw_val);
395vbatt_read_fail:
396 return ret;
397}
398
399static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur)
400{
401 int ret, value = 0;
402 int charge, discharge;
403
404 ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info);
405 if (ret < 0)
406 goto current_read_fail;
407 ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info);
408 if (ret < 0)
409 goto current_read_fail;
410
411 if (charge > 0)
412 value = charge;
413 else if (discharge > 0)
414 value = -1 * discharge;
415
416 *cur = value;
417current_read_fail:
418 return ret;
419}
420
421static int temp_to_adc(struct axp288_fg_info *info, int tval)
422{
423 int rntc = 0, i, ret, adc_val;
424 int rmin, rmax, tmin, tmax;
425 int tcsz = info->pdata->tcsz;
426
427 /* get the Rntc resitance value for this temp */
428 if (tval > info->pdata->thermistor_curve[0][1]) {
429 rntc = info->pdata->thermistor_curve[0][0];
430 } else if (tval <= info->pdata->thermistor_curve[tcsz-1][1]) {
431 rntc = info->pdata->thermistor_curve[tcsz-1][0];
432 } else {
433 for (i = 1; i < tcsz; i++) {
434 if (tval > info->pdata->thermistor_curve[i][1]) {
435 rmin = info->pdata->thermistor_curve[i-1][0];
436 rmax = info->pdata->thermistor_curve[i][0];
437 tmin = info->pdata->thermistor_curve[i-1][1];
438 tmax = info->pdata->thermistor_curve[i][1];
439 rntc = rmin + ((rmax - rmin) *
440 (tval - tmin) / (tmax - tmin));
441 break;
442 }
443 }
444 }
445
446 /* we need the current to calculate the proper adc voltage */
447 ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE);
448 if (ret < 0) {
449 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
450 ret = 0x30;
451 }
452
453 /*
454 * temperature is proportional to NTS thermistor resistance
455 * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA
456 * [12-bit ADC VAL] = R_NTC(Ω) * current / 800
457 */
458 adc_val = rntc * (20 + (20 * ((ret >> 4) & 0x3))) / 800;
459
460 return adc_val;
461}
462
463static int adc_to_temp(struct axp288_fg_info *info, int adc_val)
464{
465 int ret, r, i, tval = 0;
466 int rmin, rmax, tmin, tmax;
467 int tcsz = info->pdata->tcsz;
468
469 ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE);
470 if (ret < 0) {
471 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
472 ret = 0x30;
473 }
474
475 /*
476 * temperature is proportional to NTS thermistor resistance
477 * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA
478 * R_NTC(Ω) = [12-bit ADC VAL] * 800 / current
479 */
480 r = adc_val * 800 / (20 + (20 * ((ret >> 4) & 0x3)));
481
482 if (r < info->pdata->thermistor_curve[0][0]) {
483 tval = info->pdata->thermistor_curve[0][1];
484 } else if (r >= info->pdata->thermistor_curve[tcsz-1][0]) {
485 tval = info->pdata->thermistor_curve[tcsz-1][1];
486 } else {
487 for (i = 1; i < tcsz; i++) {
488 if (r < info->pdata->thermistor_curve[i][0]) {
489 rmin = info->pdata->thermistor_curve[i-1][0];
490 rmax = info->pdata->thermistor_curve[i][0];
491 tmin = info->pdata->thermistor_curve[i-1][1];
492 tmax = info->pdata->thermistor_curve[i][1];
493 tval = tmin + ((tmax - tmin) *
494 (r - rmin) / (rmax - rmin));
495 break;
496 }
497 }
498 }
499
500 return tval;
501}
502
503static int fuel_gauge_get_btemp(struct axp288_fg_info *info, int *btemp)
504{
505 int ret, raw_val = 0;
506
507 ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info);
508 if (ret < 0)
509 goto temp_read_fail;
510
511 *btemp = adc_to_temp(info, raw_val);
512
513temp_read_fail:
514 return ret;
515}
516
517static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv)
518{
519 int ret, value;
520
521 /* 12-bit data value, upper 8 in OCVH, lower 4 in OCVL */
522 ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG);
523 if (ret < 0)
524 goto vocv_read_fail;
525 value = ret << 4;
526
527 ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG);
528 if (ret < 0)
529 goto vocv_read_fail;
530 value |= (ret & 0xf);
531
532 *vocv = VOLTAGE_FROM_ADC(value);
533vocv_read_fail:
534 return ret;
535}
536
537static int fuel_gauge_battery_health(struct axp288_fg_info *info)
538{
539 int temp, vocv;
540 int ret, health = POWER_SUPPLY_HEALTH_UNKNOWN;
541
542 ret = fuel_gauge_get_btemp(info, &temp);
543 if (ret < 0)
544 goto health_read_fail;
545
546 ret = fuel_gauge_get_vocv(info, &vocv);
547 if (ret < 0)
548 goto health_read_fail;
549
550 if (vocv > info->pdata->max_volt)
551 health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
552 else if (temp > info->pdata->max_temp)
553 health = POWER_SUPPLY_HEALTH_OVERHEAT;
554 else if (temp < info->pdata->min_temp)
555 health = POWER_SUPPLY_HEALTH_COLD;
556 else if (vocv < info->pdata->min_volt)
557 health = POWER_SUPPLY_HEALTH_DEAD;
558 else
559 health = POWER_SUPPLY_HEALTH_GOOD;
560
561health_read_fail:
562 return health;
563}
564
565static int fuel_gauge_set_high_btemp_alert(struct axp288_fg_info *info)
566{
567 int ret, adc_val;
568
569 /* program temperature threshold as 1/16 ADC value */
570 adc_val = temp_to_adc(info, info->pdata->max_temp);
571 ret = fuel_gauge_reg_writeb(info, AXP20X_V_HTF_DISCHRG, adc_val >> 4);
572
573 return ret;
574}
575
576static int fuel_gauge_set_low_btemp_alert(struct axp288_fg_info *info)
577{
578 int ret, adc_val;
579
580 /* program temperature threshold as 1/16 ADC value */
581 adc_val = temp_to_adc(info, info->pdata->min_temp);
582 ret = fuel_gauge_reg_writeb(info, AXP20X_V_LTF_DISCHRG, adc_val >> 4);
583
584 return ret;
585}
586
587static int fuel_gauge_get_property(struct power_supply *ps,
588 enum power_supply_property prop,
589 union power_supply_propval *val)
590{
591 struct axp288_fg_info *info = container_of(ps,
592 struct axp288_fg_info, bat);
593 int ret = 0, value;
594
595 mutex_lock(&info->lock);
596 switch (prop) {
597 case POWER_SUPPLY_PROP_STATUS:
598 fuel_gauge_get_status(info);
599 val->intval = info->status;
600 break;
601 case POWER_SUPPLY_PROP_HEALTH:
602 val->intval = fuel_gauge_battery_health(info);
603 break;
604 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
605 ret = fuel_gauge_get_vbatt(info, &value);
606 if (ret < 0)
607 goto fuel_gauge_read_err;
608 val->intval = PROP_VOLT(value);
609 break;
610 case POWER_SUPPLY_PROP_VOLTAGE_OCV:
611 ret = fuel_gauge_get_vocv(info, &value);
612 if (ret < 0)
613 goto fuel_gauge_read_err;
614 val->intval = PROP_VOLT(value);
615 break;
616 case POWER_SUPPLY_PROP_CURRENT_NOW:
617 ret = fuel_gauge_get_current(info, &value);
618 if (ret < 0)
619 goto fuel_gauge_read_err;
620 val->intval = PROP_CURR(value);
621 break;
622 case POWER_SUPPLY_PROP_PRESENT:
623 ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE);
624 if (ret < 0)
625 goto fuel_gauge_read_err;
626
627 if (ret & CHRG_STAT_BAT_PRESENT)
628 val->intval = 1;
629 else
630 val->intval = 0;
631 break;
632 case POWER_SUPPLY_PROP_CAPACITY:
633 ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
634 if (ret < 0)
635 goto fuel_gauge_read_err;
636
637 if (!(ret & FG_REP_CAP_VALID))
638 dev_err(&info->pdev->dev,
639 "capacity measurement not valid\n");
640 val->intval = (ret & FG_REP_CAP_VAL_MASK);
641 break;
642 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
643 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
644 if (ret < 0)
645 goto fuel_gauge_read_err;
646 val->intval = (ret & 0x0f);
647 break;
648 case POWER_SUPPLY_PROP_TEMP:
649 ret = fuel_gauge_get_btemp(info, &value);
650 if (ret < 0)
651 goto fuel_gauge_read_err;
652 val->intval = PROP_TEMP(value);
653 break;
654 case POWER_SUPPLY_PROP_TEMP_MAX:
655 case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
656 val->intval = PROP_TEMP(info->pdata->max_temp);
657 break;
658 case POWER_SUPPLY_PROP_TEMP_MIN:
659 case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
660 val->intval = PROP_TEMP(info->pdata->min_temp);
661 break;
662 case POWER_SUPPLY_PROP_TECHNOLOGY:
663 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
664 break;
665 case POWER_SUPPLY_PROP_CHARGE_NOW:
666 ret = fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR1_REG);
667 if (ret < 0)
668 goto fuel_gauge_read_err;
669
670 value = (ret & FG_CC_MTR1_VAL_MASK) << 8;
671 ret = fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR0_REG);
672 if (ret < 0)
673 goto fuel_gauge_read_err;
674 value |= (ret & FG_CC_MTR0_VAL_MASK);
675 val->intval = value * FG_DES_CAP_RES_LSB;
676 break;
677 case POWER_SUPPLY_PROP_CHARGE_FULL:
678 ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
679 if (ret < 0)
680 goto fuel_gauge_read_err;
681
682 value = (ret & FG_DES_CAP1_VAL_MASK) << 8;
683 ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP0_REG);
684 if (ret < 0)
685 goto fuel_gauge_read_err;
686 value |= (ret & FG_DES_CAP0_VAL_MASK);
687 val->intval = value * FG_DES_CAP_RES_LSB;
688 break;
689 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
690 val->intval = PROP_CURR(info->pdata->design_cap);
691 break;
692 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
693 val->intval = PROP_VOLT(info->pdata->max_volt);
694 break;
695 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
696 val->intval = PROP_VOLT(info->pdata->min_volt);
697 break;
698 case POWER_SUPPLY_PROP_MODEL_NAME:
699 val->strval = info->pdata->battid;
700 break;
701 default:
702 mutex_unlock(&info->lock);
703 return -EINVAL;
704 }
705
706 mutex_unlock(&info->lock);
707 return 0;
708
709fuel_gauge_read_err:
710 mutex_unlock(&info->lock);
711 return ret;
712}
713
714static int fuel_gauge_set_property(struct power_supply *ps,
715 enum power_supply_property prop,
716 const union power_supply_propval *val)
717{
718 struct axp288_fg_info *info = container_of(ps,
719 struct axp288_fg_info, bat);
720 int ret = 0;
721
722 mutex_lock(&info->lock);
723 switch (prop) {
724 case POWER_SUPPLY_PROP_STATUS:
725 info->status = val->intval;
726 break;
727 case POWER_SUPPLY_PROP_TEMP_MIN:
728 case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
729 if ((val->intval < PD_DEF_MIN_TEMP) ||
730 (val->intval > PD_DEF_MAX_TEMP)) {
731 ret = -EINVAL;
732 break;
733 }
734 info->pdata->min_temp = UNPROP_TEMP(val->intval);
735 ret = fuel_gauge_set_low_btemp_alert(info);
736 if (ret < 0)
737 dev_err(&info->pdev->dev,
738 "temp alert min set fail:%d\n", ret);
739 break;
740 case POWER_SUPPLY_PROP_TEMP_MAX:
741 case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
742 if ((val->intval < PD_DEF_MIN_TEMP) ||
743 (val->intval > PD_DEF_MAX_TEMP)) {
744 ret = -EINVAL;
745 break;
746 }
747 info->pdata->max_temp = UNPROP_TEMP(val->intval);
748 ret = fuel_gauge_set_high_btemp_alert(info);
749 if (ret < 0)
750 dev_err(&info->pdev->dev,
751 "temp alert max set fail:%d\n", ret);
752 break;
753 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
754 if ((val->intval < 0) || (val->intval > 15)) {
755 ret = -EINVAL;
756 break;
757 }
758 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
759 if (ret < 0)
760 break;
761 ret &= 0xf0;
762 ret |= (val->intval & 0xf);
763 ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret);
764 break;
765 default:
766 ret = -EINVAL;
767 break;
768 }
769
770 mutex_unlock(&info->lock);
771 return ret;
772}
773
774static int fuel_gauge_property_is_writeable(struct power_supply *psy,
775 enum power_supply_property psp)
776{
777 int ret;
778
779 switch (psp) {
780 case POWER_SUPPLY_PROP_STATUS:
781 case POWER_SUPPLY_PROP_TEMP_MIN:
782 case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
783 case POWER_SUPPLY_PROP_TEMP_MAX:
784 case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
785 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
786 ret = 1;
787 break;
788 default:
789 ret = 0;
790 }
791
792 return ret;
793}
794
795static void fuel_gauge_status_monitor(struct work_struct *work)
796{
797 struct axp288_fg_info *info = container_of(work,
798 struct axp288_fg_info, status_monitor.work);
799
800 fuel_gauge_get_status(info);
801 power_supply_changed(&info->bat);
802 schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
803}
804
805static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev)
806{
807 struct axp288_fg_info *info = dev;
808 int i;
809
810 for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
811 if (info->irq[i] == irq)
812 break;
813 }
814
815 if (i >= AXP288_FG_INTR_NUM) {
816 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
817 return IRQ_NONE;
818 }
819
820 switch (i) {
821 case QWBTU_IRQ:
822 dev_info(&info->pdev->dev,
823 "Quit Battery under temperature in work mode IRQ (QWBTU)\n");
824 break;
825 case WBTU_IRQ:
826 dev_info(&info->pdev->dev,
827 "Battery under temperature in work mode IRQ (WBTU)\n");
828 break;
829 case QWBTO_IRQ:
830 dev_info(&info->pdev->dev,
831 "Quit Battery over temperature in work mode IRQ (QWBTO)\n");
832 break;
833 case WBTO_IRQ:
834 dev_info(&info->pdev->dev,
835 "Battery over temperature in work mode IRQ (WBTO)\n");
836 break;
837 case WL2_IRQ:
838 dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n");
839 break;
840 case WL1_IRQ:
841 dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n");
842 break;
843 default:
844 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
845 }
846
847 power_supply_changed(&info->bat);
848 return IRQ_HANDLED;
849}
850
851static void fuel_gauge_external_power_changed(struct power_supply *psy)
852{
853 struct axp288_fg_info *info = container_of(psy,
854 struct axp288_fg_info, bat);
855
856 power_supply_changed(&info->bat);
857}
858
859static int fuel_gauge_set_lowbatt_thresholds(struct axp288_fg_info *info)
860{
861 int ret;
862 u8 reg_val;
863
864 ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
865 if (ret < 0) {
866 dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret);
867 return ret;
868 }
869 ret = (ret & FG_REP_CAP_VAL_MASK);
870
871 if (ret > FG_LOW_CAP_WARN_THR)
872 reg_val = FG_LOW_CAP_WARN_THR;
873 else if (ret > FG_LOW_CAP_CRIT_THR)
874 reg_val = FG_LOW_CAP_CRIT_THR;
875 else
876 reg_val = FG_LOW_CAP_SHDN_THR;
877
878 reg_val |= FG_LOW_CAP_THR1_VAL;
879 ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, reg_val);
880 if (ret < 0)
881 dev_err(&info->pdev->dev, "%s:write err:%d\n", __func__, ret);
882
883 return ret;
884}
885
886static int fuel_gauge_program_vbatt_full(struct axp288_fg_info *info)
887{
888 int ret;
889 u8 val;
890
891 ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1);
892 if (ret < 0)
893 goto fg_prog_ocv_fail;
894 else
895 val = (ret & ~CHRG_CCCV_CV_MASK);
896
897 switch (info->pdata->max_volt) {
898 case CV_4100:
899 val |= (CHRG_CCCV_CV_4100MV << CHRG_CCCV_CV_BIT_POS);
900 break;
901 case CV_4150:
902 val |= (CHRG_CCCV_CV_4150MV << CHRG_CCCV_CV_BIT_POS);
903 break;
904 case CV_4200:
905 val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS);
906 break;
907 case CV_4350:
908 val |= (CHRG_CCCV_CV_4350MV << CHRG_CCCV_CV_BIT_POS);
909 break;
910 default:
911 val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS);
912 break;
913 }
914
915 ret = fuel_gauge_reg_writeb(info, AXP20X_CHRG_CTRL1, val);
916fg_prog_ocv_fail:
917 return ret;
918}
919
920static int fuel_gauge_program_design_cap(struct axp288_fg_info *info)
921{
922 int ret;
923
924 ret = fuel_gauge_reg_writeb(info,
925 AXP288_FG_DES_CAP1_REG, info->pdata->cap1);
926 if (ret < 0)
927 goto fg_prog_descap_fail;
928
929 ret = fuel_gauge_reg_writeb(info,
930 AXP288_FG_DES_CAP0_REG, info->pdata->cap0);
931
932fg_prog_descap_fail:
933 return ret;
934}
935
936static int fuel_gauge_program_ocv_curve(struct axp288_fg_info *info)
937{
938 int ret = 0, i;
939
940 for (i = 0; i < OCV_CURVE_SIZE; i++) {
941 ret = fuel_gauge_reg_writeb(info,
942 AXP288_FG_OCV_CURVE_REG + i, info->pdata->ocv_curve[i]);
943 if (ret < 0)
944 goto fg_prog_ocv_fail;
945 }
946
947fg_prog_ocv_fail:
948 return ret;
949}
950
951static int fuel_gauge_program_rdc_vals(struct axp288_fg_info *info)
952{
953 int ret;
954
955 ret = fuel_gauge_reg_writeb(info,
956 AXP288_FG_RDC1_REG, info->pdata->rdc1);
957 if (ret < 0)
958 goto fg_prog_ocv_fail;
959
960 ret = fuel_gauge_reg_writeb(info,
961 AXP288_FG_RDC0_REG, info->pdata->rdc0);
962
963fg_prog_ocv_fail:
964 return ret;
965}
966
967static void fuel_gauge_init_config_regs(struct axp288_fg_info *info)
968{
969 int ret;
970
971 /*
972 * check if the config data is already
973 * programmed and if so just return.
974 */
975
976 ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
977 if (ret < 0) {
978 dev_warn(&info->pdev->dev, "CAP1 reg read err!!\n");
979 } else if (!(ret & FG_DES_CAP1_VALID)) {
980 dev_info(&info->pdev->dev, "FG data needs to be initialized\n");
981 } else {
982 dev_info(&info->pdev->dev, "FG data is already initialized\n");
983 return;
984 }
985
986 ret = fuel_gauge_program_vbatt_full(info);
987 if (ret < 0)
988 dev_err(&info->pdev->dev, "set vbatt full fail:%d\n", ret);
989
990 ret = fuel_gauge_program_design_cap(info);
991 if (ret < 0)
992 dev_err(&info->pdev->dev, "set design cap fail:%d\n", ret);
993
994 ret = fuel_gauge_program_rdc_vals(info);
995 if (ret < 0)
996 dev_err(&info->pdev->dev, "set rdc fail:%d\n", ret);
997
998 ret = fuel_gauge_program_ocv_curve(info);
999 if (ret < 0)
1000 dev_err(&info->pdev->dev, "set ocv curve fail:%d\n", ret);
1001
1002 ret = fuel_gauge_set_lowbatt_thresholds(info);
1003 if (ret < 0)
1004 dev_err(&info->pdev->dev, "lowbatt thr set fail:%d\n", ret);
1005
1006 ret = fuel_gauge_reg_writeb(info, AXP20X_CC_CTRL, 0xef);
1007 if (ret < 0)
1008 dev_err(&info->pdev->dev, "gauge cntl set fail:%d\n", ret);
1009}
1010
1011static void fuel_gauge_init_irq(struct axp288_fg_info *info)
1012{
1013 int ret, i, pirq;
1014
1015 for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
1016 pirq = platform_get_irq(info->pdev, i);
1017 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
1018 if (info->irq[i] < 0) {
1019 dev_warn(&info->pdev->dev,
1020 "regmap_irq get virq failed for IRQ %d: %d\n",
1021 pirq, info->irq[i]);
1022 info->irq[i] = -1;
1023 goto intr_failed;
1024 }
1025 ret = request_threaded_irq(info->irq[i],
1026 NULL, fuel_gauge_thread_handler,
1027 IRQF_ONESHOT, DEV_NAME, info);
1028 if (ret) {
1029 dev_warn(&info->pdev->dev,
1030 "request irq failed for IRQ %d: %d\n",
1031 pirq, info->irq[i]);
1032 info->irq[i] = -1;
1033 goto intr_failed;
1034 } else {
1035 dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n",
1036 pirq, info->irq[i]);
1037 }
1038 }
1039 return;
1040
1041intr_failed:
1042 for (; i > 0; i--) {
1043 free_irq(info->irq[i - 1], info);
1044 info->irq[i - 1] = -1;
1045 }
1046}
1047
1048static void fuel_gauge_init_hw_regs(struct axp288_fg_info *info)
1049{
1050 int ret;
1051 unsigned int val;
1052
1053 ret = fuel_gauge_set_high_btemp_alert(info);
1054 if (ret < 0)
1055 dev_err(&info->pdev->dev, "high batt temp set fail:%d\n", ret);
1056
1057 ret = fuel_gauge_set_low_btemp_alert(info);
1058 if (ret < 0)
1059 dev_err(&info->pdev->dev, "low batt temp set fail:%d\n", ret);
1060
1061 /* enable interrupts */
1062 val = fuel_gauge_reg_readb(info, AXP20X_IRQ3_EN);
1063 val |= TEMP_IRQ_CFG_MASK;
1064 fuel_gauge_reg_writeb(info, AXP20X_IRQ3_EN, val);
1065
1066 val = fuel_gauge_reg_readb(info, AXP20X_IRQ4_EN);
1067 val |= FG_IRQ_CFG_LOWBATT_MASK;
1068 val = fuel_gauge_reg_writeb(info, AXP20X_IRQ4_EN, val);
1069}
1070
1071static int axp288_fuel_gauge_probe(struct platform_device *pdev)
1072{
1073 int ret;
1074 struct axp288_fg_info *info;
1075 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
1076
1077 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
1078 if (!info)
1079 return -ENOMEM;
1080
1081 info->pdev = pdev;
1082 info->regmap = axp20x->regmap;
1083 info->regmap_irqc = axp20x->regmap_irqc;
1084 info->status = POWER_SUPPLY_STATUS_UNKNOWN;
1085 info->pdata = pdev->dev.platform_data;
1086 if (!info->pdata)
1087 return -ENODEV;
1088
1089 platform_set_drvdata(pdev, info);
1090
1091 mutex_init(&info->lock);
1092 INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor);
1093
1094 info->bat.name = DEV_NAME;
1095 info->bat.type = POWER_SUPPLY_TYPE_BATTERY;
1096 info->bat.properties = fuel_gauge_props;
1097 info->bat.num_properties = ARRAY_SIZE(fuel_gauge_props);
1098 info->bat.get_property = fuel_gauge_get_property;
1099 info->bat.set_property = fuel_gauge_set_property;
1100 info->bat.property_is_writeable = fuel_gauge_property_is_writeable;
1101 info->bat.external_power_changed = fuel_gauge_external_power_changed;
2dc9215d 1102 ret = power_supply_register(&pdev->dev, &info->bat, NULL);
5a5bf490
TB		 1103 if (ret) {
1104 dev_err(&pdev->dev, "failed to register battery: %d\n", ret);
1105 return ret;
1106 }
1107
1108 fuel_gauge_create_debugfs(info);
1109 fuel_gauge_init_config_regs(info);
1110 fuel_gauge_init_irq(info);
1111 fuel_gauge_init_hw_regs(info);
1112 schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES);
1113
1114 return ret;
1115}
1116
1117static struct platform_device_id axp288_fg_id_table[] = {
1118 { .name = DEV_NAME },
1119 {},
1120};
1121
1122static int axp288_fuel_gauge_remove(struct platform_device *pdev)
1123{
1124 struct axp288_fg_info *info = platform_get_drvdata(pdev);
1125 int i;
1126
1127 cancel_delayed_work_sync(&info->status_monitor);
1128 power_supply_unregister(&info->bat);
1129 fuel_gauge_remove_debugfs(info);
1130
1131 for (i = 0; i < AXP288_FG_INTR_NUM; i++)
1132 if (info->irq[i] >= 0)
1133 free_irq(info->irq[i], info);
1134
1135 return 0;
1136}
1137
1138static struct platform_driver axp288_fuel_gauge_driver = {
1139 .probe = axp288_fuel_gauge_probe,
1140 .remove = axp288_fuel_gauge_remove,
1141 .id_table = axp288_fg_id_table,
1142 .driver = {
1143 .name = DEV_NAME,
1144 },
1145};
1146
1147module_platform_driver(axp288_fuel_gauge_driver);
1148
1149MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>");
1150MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver");
1151MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)