1 // SPDX-License-Identifier: GPL-2.0-only
3 * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver
5 * Copyright (C) 2016-2017 Hans de Goede <hdegoede@redhat.com>
6 * Copyright (C) 2014 Intel Corporation
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
11 #include <linux/dmi.h>
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/device.h>
15 #include <linux/regmap.h>
16 #include <linux/jiffies.h>
17 #include <linux/interrupt.h>
18 #include <linux/mfd/axp20x.h>
19 #include <linux/platform_device.h>
20 #include <linux/power_supply.h>
21 #include <linux/iio/consumer.h>
22 #include <linux/debugfs.h>
23 #include <linux/seq_file.h>
24 #include <asm/unaligned.h>
26 #define PS_STAT_VBUS_TRIGGER (1 << 0)
27 #define PS_STAT_BAT_CHRG_DIR (1 << 2)
28 #define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3)
29 #define PS_STAT_VBUS_VALID (1 << 4)
30 #define PS_STAT_VBUS_PRESENT (1 << 5)
32 #define CHRG_STAT_BAT_SAFE_MODE (1 << 3)
33 #define CHRG_STAT_BAT_VALID (1 << 4)
34 #define CHRG_STAT_BAT_PRESENT (1 << 5)
35 #define CHRG_STAT_CHARGING (1 << 6)
36 #define CHRG_STAT_PMIC_OTP (1 << 7)
38 #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */
39 #define CHRG_CCCV_CC_BIT_POS 0
40 #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */
41 #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */
42 #define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */
43 #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */
44 #define CHRG_CCCV_CV_BIT_POS 5
45 #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */
46 #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */
47 #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */
48 #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */
49 #define CHRG_CCCV_CHG_EN (1 << 7)
51 #define FG_CNTL_OCV_ADJ_STAT (1 << 2)
52 #define FG_CNTL_OCV_ADJ_EN (1 << 3)
53 #define FG_CNTL_CAP_ADJ_STAT (1 << 4)
54 #define FG_CNTL_CAP_ADJ_EN (1 << 5)
55 #define FG_CNTL_CC_EN (1 << 6)
56 #define FG_CNTL_GAUGE_EN (1 << 7)
58 #define FG_15BIT_WORD_VALID (1 << 15)
59 #define FG_15BIT_VAL_MASK 0x7fff
61 #define FG_REP_CAP_VALID (1 << 7)
62 #define FG_REP_CAP_VAL_MASK 0x7F
64 #define FG_DES_CAP1_VALID (1 << 7)
65 #define FG_DES_CAP_RES_LSB 1456 /* 1.456mAhr */
67 #define FG_DES_CC_RES_LSB 1456 /* 1.456mAhr */
69 #define FG_OCV_CAP_VALID (1 << 7)
70 #define FG_OCV_CAP_VAL_MASK 0x7F
71 #define FG_CC_CAP_VALID (1 << 7)
72 #define FG_CC_CAP_VAL_MASK 0x7F
74 #define FG_LOW_CAP_THR1_MASK 0xf0 /* 5% tp 20% */
75 #define FG_LOW_CAP_THR1_VAL 0xa0 /* 15 perc */
76 #define FG_LOW_CAP_THR2_MASK 0x0f /* 0% to 15% */
77 #define FG_LOW_CAP_WARN_THR 14 /* 14 perc */
78 #define FG_LOW_CAP_CRIT_THR 4 /* 4 perc */
79 #define FG_LOW_CAP_SHDN_THR 0 /* 0 perc */
81 #define NR_RETRY_CNT 3
82 #define DEV_NAME "axp288_fuel_gauge"
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)
90 #define AXP288_FG_INTR_NUM 6
110 struct axp288_fg_info {
111 struct platform_device *pdev;
112 struct regmap *regmap;
113 struct regmap_irq_chip_data *regmap_irqc;
114 int irq[AXP288_FG_INTR_NUM];
115 struct iio_channel *iio_channel[IIO_CHANNEL_NUM];
116 struct power_supply *bat;
120 struct dentry *debug_file;
123 static enum power_supply_property fuel_gauge_props[] = {
124 POWER_SUPPLY_PROP_STATUS,
125 POWER_SUPPLY_PROP_PRESENT,
126 POWER_SUPPLY_PROP_HEALTH,
127 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
128 POWER_SUPPLY_PROP_VOLTAGE_NOW,
129 POWER_SUPPLY_PROP_VOLTAGE_OCV,
130 POWER_SUPPLY_PROP_CURRENT_NOW,
131 POWER_SUPPLY_PROP_CAPACITY,
132 POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
133 POWER_SUPPLY_PROP_TECHNOLOGY,
134 POWER_SUPPLY_PROP_CHARGE_FULL,
135 POWER_SUPPLY_PROP_CHARGE_NOW,
138 static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg)
143 for (i = 0; i < NR_RETRY_CNT; i++) {
144 ret = regmap_read(info->regmap, reg, &val);
152 dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", ret);
159 static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val)
163 ret = regmap_write(info->regmap, reg, (unsigned int)val);
166 dev_err(&info->pdev->dev, "axp288 reg write err:%d\n", ret);
171 static int fuel_gauge_read_15bit_word(struct axp288_fg_info *info, int reg)
173 unsigned char buf[2];
176 ret = regmap_bulk_read(info->regmap, reg, buf, 2);
178 dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n",
183 ret = get_unaligned_be16(buf);
184 if (!(ret & FG_15BIT_WORD_VALID)) {
185 dev_err(&info->pdev->dev, "Error reg 0x%02x contents not valid\n",
190 return ret & FG_15BIT_VAL_MASK;
193 static int fuel_gauge_read_12bit_word(struct axp288_fg_info *info, int reg)
195 unsigned char buf[2];
198 ret = regmap_bulk_read(info->regmap, reg, buf, 2);
200 dev_err(&info->pdev->dev, "Error reading reg 0x%02x err: %d\n",
205 /* 12-bit data values have upper 8 bits in buf[0], lower 4 in buf[1] */
206 return (buf[0] << 4) | ((buf[1] >> 4) & 0x0f);
209 #ifdef CONFIG_DEBUG_FS
210 static int fuel_gauge_debug_show(struct seq_file *s, void *data)
212 struct axp288_fg_info *info = s->private;
215 seq_printf(s, " PWR_STATUS[%02x] : %02x\n",
216 AXP20X_PWR_INPUT_STATUS,
217 fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS));
218 seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n",
220 fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE));
221 seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n",
223 fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1));
224 seq_printf(s, " VLTF[%02x] : %02x\n",
225 AXP20X_V_LTF_DISCHRG,
226 fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG));
227 seq_printf(s, " VHTF[%02x] : %02x\n",
228 AXP20X_V_HTF_DISCHRG,
229 fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG));
230 seq_printf(s, " CC_CTRL[%02x] : %02x\n",
232 fuel_gauge_reg_readb(info, AXP20X_CC_CTRL));
233 seq_printf(s, "BATTERY CAP[%02x] : %02x\n",
235 fuel_gauge_reg_readb(info, AXP20X_FG_RES));
236 seq_printf(s, " FG_RDC1[%02x] : %02x\n",
238 fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG));
239 seq_printf(s, " FG_RDC0[%02x] : %02x\n",
241 fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG));
242 seq_printf(s, " FG_OCV[%02x] : %04x\n",
244 fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG));
245 seq_printf(s, " FG_DES_CAP[%02x] : %04x\n",
246 AXP288_FG_DES_CAP1_REG,
247 fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG));
248 seq_printf(s, " FG_CC_MTR[%02x] : %04x\n",
249 AXP288_FG_CC_MTR1_REG,
250 fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG));
251 seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n",
252 AXP288_FG_OCV_CAP_REG,
253 fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG));
254 seq_printf(s, " FG_CC_CAP[%02x] : %02x\n",
255 AXP288_FG_CC_CAP_REG,
256 fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG));
257 seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n",
258 AXP288_FG_LOW_CAP_REG,
259 fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG));
260 seq_printf(s, "TUNING_CTL0[%02x] : %02x\n",
262 fuel_gauge_reg_readb(info, AXP288_FG_TUNE0));
263 seq_printf(s, "TUNING_CTL1[%02x] : %02x\n",
265 fuel_gauge_reg_readb(info, AXP288_FG_TUNE1));
266 seq_printf(s, "TUNING_CTL2[%02x] : %02x\n",
268 fuel_gauge_reg_readb(info, AXP288_FG_TUNE2));
269 seq_printf(s, "TUNING_CTL3[%02x] : %02x\n",
271 fuel_gauge_reg_readb(info, AXP288_FG_TUNE3));
272 seq_printf(s, "TUNING_CTL4[%02x] : %02x\n",
274 fuel_gauge_reg_readb(info, AXP288_FG_TUNE4));
275 seq_printf(s, "TUNING_CTL5[%02x] : %02x\n",
277 fuel_gauge_reg_readb(info, AXP288_FG_TUNE5));
279 ret = iio_read_channel_raw(info->iio_channel[BAT_TEMP], &raw_val);
281 seq_printf(s, "axp288-batttemp : %d\n", raw_val);
282 ret = iio_read_channel_raw(info->iio_channel[PMIC_TEMP], &raw_val);
284 seq_printf(s, "axp288-pmictemp : %d\n", raw_val);
285 ret = iio_read_channel_raw(info->iio_channel[SYSTEM_TEMP], &raw_val);
287 seq_printf(s, "axp288-systtemp : %d\n", raw_val);
288 ret = iio_read_channel_raw(info->iio_channel[BAT_CHRG_CURR], &raw_val);
290 seq_printf(s, "axp288-chrgcurr : %d\n", raw_val);
291 ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &raw_val);
293 seq_printf(s, "axp288-dchrgcur : %d\n", raw_val);
294 ret = iio_read_channel_raw(info->iio_channel[BAT_VOLT], &raw_val);
296 seq_printf(s, "axp288-battvolt : %d\n", raw_val);
301 DEFINE_SHOW_ATTRIBUTE(fuel_gauge_debug);
303 static void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
305 info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL,
306 info, &fuel_gauge_debug_fops);
309 static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
311 debugfs_remove(info->debug_file);
314 static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info)
317 static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info)
322 static void fuel_gauge_get_status(struct axp288_fg_info *info)
324 int pwr_stat, fg_res, curr, ret;
326 pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS);
328 dev_err(&info->pdev->dev,
329 "PWR STAT read failed:%d\n", pwr_stat);
333 /* Report full if Vbus is valid and the reported capacity is 100% */
334 if (!(pwr_stat & PS_STAT_VBUS_VALID))
337 fg_res = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
339 dev_err(&info->pdev->dev, "FG RES read failed: %d\n", fg_res);
342 if (!(fg_res & FG_REP_CAP_VALID))
345 fg_res &= ~FG_REP_CAP_VALID;
347 info->status = POWER_SUPPLY_STATUS_FULL;
352 * Sometimes the charger turns itself off before fg-res reaches 100%.
353 * When this happens the AXP288 reports a not-charging status and
354 * 0 mA discharge current.
356 if (fg_res < 90 || (pwr_stat & PS_STAT_BAT_CHRG_DIR))
359 ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &curr);
361 dev_err(&info->pdev->dev, "FG get current failed: %d\n", ret);
365 info->status = POWER_SUPPLY_STATUS_FULL;
370 if (pwr_stat & PS_STAT_BAT_CHRG_DIR)
371 info->status = POWER_SUPPLY_STATUS_CHARGING;
373 info->status = POWER_SUPPLY_STATUS_DISCHARGING;
376 static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt)
378 int ret = 0, raw_val;
380 ret = iio_read_channel_raw(info->iio_channel[BAT_VOLT], &raw_val);
382 goto vbatt_read_fail;
384 *vbatt = VOLTAGE_FROM_ADC(raw_val);
389 static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur)
393 /* First check discharge current, so that we do only 1 read on bat. */
394 ret = iio_read_channel_raw(info->iio_channel[BAT_D_CURR], &discharge);
399 *cur = -1 * discharge;
403 return iio_read_channel_raw(info->iio_channel[BAT_CHRG_CURR], cur);
406 static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv)
410 ret = fuel_gauge_read_12bit_word(info, AXP288_FG_OCVH_REG);
412 *vocv = VOLTAGE_FROM_ADC(ret);
417 static int fuel_gauge_battery_health(struct axp288_fg_info *info)
419 int ret, vocv, health = POWER_SUPPLY_HEALTH_UNKNOWN;
421 ret = fuel_gauge_get_vocv(info, &vocv);
423 goto health_read_fail;
425 if (vocv > info->max_volt)
426 health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
428 health = POWER_SUPPLY_HEALTH_GOOD;
434 static int fuel_gauge_get_property(struct power_supply *ps,
435 enum power_supply_property prop,
436 union power_supply_propval *val)
438 struct axp288_fg_info *info = power_supply_get_drvdata(ps);
441 mutex_lock(&info->lock);
443 case POWER_SUPPLY_PROP_STATUS:
444 fuel_gauge_get_status(info);
445 val->intval = info->status;
447 case POWER_SUPPLY_PROP_HEALTH:
448 val->intval = fuel_gauge_battery_health(info);
450 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
451 ret = fuel_gauge_get_vbatt(info, &value);
453 goto fuel_gauge_read_err;
454 val->intval = PROP_VOLT(value);
456 case POWER_SUPPLY_PROP_VOLTAGE_OCV:
457 ret = fuel_gauge_get_vocv(info, &value);
459 goto fuel_gauge_read_err;
460 val->intval = PROP_VOLT(value);
462 case POWER_SUPPLY_PROP_CURRENT_NOW:
463 ret = fuel_gauge_get_current(info, &value);
465 goto fuel_gauge_read_err;
466 val->intval = PROP_CURR(value);
468 case POWER_SUPPLY_PROP_PRESENT:
469 ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE);
471 goto fuel_gauge_read_err;
473 if (ret & CHRG_STAT_BAT_PRESENT)
478 case POWER_SUPPLY_PROP_CAPACITY:
479 ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES);
481 goto fuel_gauge_read_err;
483 if (!(ret & FG_REP_CAP_VALID))
484 dev_err(&info->pdev->dev,
485 "capacity measurement not valid\n");
486 val->intval = (ret & FG_REP_CAP_VAL_MASK);
488 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
489 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
491 goto fuel_gauge_read_err;
492 val->intval = (ret & 0x0f);
494 case POWER_SUPPLY_PROP_TECHNOLOGY:
495 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
497 case POWER_SUPPLY_PROP_CHARGE_NOW:
498 ret = fuel_gauge_read_15bit_word(info, AXP288_FG_CC_MTR1_REG);
500 goto fuel_gauge_read_err;
502 val->intval = ret * FG_DES_CAP_RES_LSB;
504 case POWER_SUPPLY_PROP_CHARGE_FULL:
505 ret = fuel_gauge_read_15bit_word(info, AXP288_FG_DES_CAP1_REG);
507 goto fuel_gauge_read_err;
509 val->intval = ret * FG_DES_CAP_RES_LSB;
511 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
512 val->intval = PROP_VOLT(info->max_volt);
515 mutex_unlock(&info->lock);
519 mutex_unlock(&info->lock);
523 mutex_unlock(&info->lock);
527 static int fuel_gauge_set_property(struct power_supply *ps,
528 enum power_supply_property prop,
529 const union power_supply_propval *val)
531 struct axp288_fg_info *info = power_supply_get_drvdata(ps);
534 mutex_lock(&info->lock);
536 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
537 if ((val->intval < 0) || (val->intval > 15)) {
541 ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG);
545 ret |= (val->intval & 0xf);
546 ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret);
553 mutex_unlock(&info->lock);
557 static int fuel_gauge_property_is_writeable(struct power_supply *psy,
558 enum power_supply_property psp)
563 case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
573 static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev)
575 struct axp288_fg_info *info = dev;
578 for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
579 if (info->irq[i] == irq)
583 if (i >= AXP288_FG_INTR_NUM) {
584 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
590 dev_info(&info->pdev->dev,
591 "Quit Battery under temperature in work mode IRQ (QWBTU)\n");
594 dev_info(&info->pdev->dev,
595 "Battery under temperature in work mode IRQ (WBTU)\n");
598 dev_info(&info->pdev->dev,
599 "Quit Battery over temperature in work mode IRQ (QWBTO)\n");
602 dev_info(&info->pdev->dev,
603 "Battery over temperature in work mode IRQ (WBTO)\n");
606 dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n");
609 dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n");
612 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
615 power_supply_changed(info->bat);
619 static void fuel_gauge_external_power_changed(struct power_supply *psy)
621 struct axp288_fg_info *info = power_supply_get_drvdata(psy);
623 power_supply_changed(info->bat);
626 static const struct power_supply_desc fuel_gauge_desc = {
628 .type = POWER_SUPPLY_TYPE_BATTERY,
629 .properties = fuel_gauge_props,
630 .num_properties = ARRAY_SIZE(fuel_gauge_props),
631 .get_property = fuel_gauge_get_property,
632 .set_property = fuel_gauge_set_property,
633 .property_is_writeable = fuel_gauge_property_is_writeable,
634 .external_power_changed = fuel_gauge_external_power_changed,
637 static void fuel_gauge_init_irq(struct axp288_fg_info *info)
641 for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
642 pirq = platform_get_irq(info->pdev, i);
643 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
644 if (info->irq[i] < 0) {
645 dev_warn(&info->pdev->dev,
646 "regmap_irq get virq failed for IRQ %d: %d\n",
651 ret = request_threaded_irq(info->irq[i],
652 NULL, fuel_gauge_thread_handler,
653 IRQF_ONESHOT, DEV_NAME, info);
655 dev_warn(&info->pdev->dev,
656 "request irq failed for IRQ %d: %d\n",
661 dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n",
669 free_irq(info->irq[i - 1], info);
670 info->irq[i - 1] = -1;
675 * Some devices have no battery (HDMI sticks) and the axp288 battery's
676 * detection reports one despite it not being there.
677 * Please keep this listed sorted alphabetically.
679 static const struct dmi_system_id axp288_fuel_gauge_blacklist[] = {
681 /* ACEPC T8 Cherry Trail Z8350 mini PC */
683 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."),
684 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
685 DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "T8"),
686 /* also match on somewhat unique bios-version */
687 DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1.000"),
691 /* ACEPC T11 Cherry Trail Z8350 mini PC */
693 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "To be filled by O.E.M."),
694 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
695 DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "T11"),
696 /* also match on somewhat unique bios-version */
697 DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1.000"),
703 DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
707 /* Intel Cherry Trail Compute Stick, Windows version */
709 DMI_MATCH(DMI_SYS_VENDOR, "Intel"),
710 DMI_MATCH(DMI_PRODUCT_NAME, "STK1AW32SC"),
714 /* Intel Cherry Trail Compute Stick, version without an OS */
716 DMI_MATCH(DMI_SYS_VENDOR, "Intel"),
717 DMI_MATCH(DMI_PRODUCT_NAME, "STK1A32SC"),
723 DMI_MATCH(DMI_PRODUCT_NAME, "MEEGOPAD T02"),
729 DMI_MATCH(DMI_SYS_VENDOR, "Default string"),
730 DMI_MATCH(DMI_BOARD_VENDOR, "To be filled by OEM."),
731 DMI_MATCH(DMI_BOARD_NAME, "T3 MRD"),
732 DMI_MATCH(DMI_BOARD_VERSION, "V1.1"),
736 /* Minix Neo Z83-4 mini PC */
738 DMI_MATCH(DMI_SYS_VENDOR, "MINIX"),
739 DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"),
745 static int axp288_fuel_gauge_probe(struct platform_device *pdev)
748 struct axp288_fg_info *info;
749 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
750 struct power_supply_config psy_cfg = {};
751 static const char * const iio_chan_name[] = {
752 [BAT_TEMP] = "axp288-batt-temp",
753 [PMIC_TEMP] = "axp288-pmic-temp",
754 [SYSTEM_TEMP] = "axp288-system-temp",
755 [BAT_CHRG_CURR] = "axp288-chrg-curr",
756 [BAT_D_CURR] = "axp288-chrg-d-curr",
757 [BAT_VOLT] = "axp288-batt-volt",
761 if (dmi_check_system(axp288_fuel_gauge_blacklist))
765 * On some devices the fuelgauge and charger parts of the axp288 are
766 * not used, check that the fuelgauge is enabled (CC_CTRL != 0).
768 ret = regmap_read(axp20x->regmap, AXP20X_CC_CTRL, &val);
774 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
779 info->regmap = axp20x->regmap;
780 info->regmap_irqc = axp20x->regmap_irqc;
781 info->status = POWER_SUPPLY_STATUS_UNKNOWN;
783 platform_set_drvdata(pdev, info);
785 mutex_init(&info->lock);
787 for (i = 0; i < IIO_CHANNEL_NUM; i++) {
789 * Note cannot use devm_iio_channel_get because x86 systems
790 * lack the device<->channel maps which iio_channel_get will
791 * try to use when passed a non NULL device pointer.
793 info->iio_channel[i] =
794 iio_channel_get(NULL, iio_chan_name[i]);
795 if (IS_ERR(info->iio_channel[i])) {
796 ret = PTR_ERR(info->iio_channel[i]);
797 dev_dbg(&pdev->dev, "error getting iiochan %s: %d\n",
798 iio_chan_name[i], ret);
799 /* Wait for axp288_adc to load */
803 goto out_free_iio_chan;
807 ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG);
809 goto out_free_iio_chan;
811 if (!(ret & FG_DES_CAP1_VALID)) {
812 dev_err(&pdev->dev, "axp288 not configured by firmware\n");
814 goto out_free_iio_chan;
817 ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1);
819 goto out_free_iio_chan;
820 switch ((ret & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS) {
821 case CHRG_CCCV_CV_4100MV:
822 info->max_volt = 4100;
824 case CHRG_CCCV_CV_4150MV:
825 info->max_volt = 4150;
827 case CHRG_CCCV_CV_4200MV:
828 info->max_volt = 4200;
830 case CHRG_CCCV_CV_4350MV:
831 info->max_volt = 4350;
835 psy_cfg.drv_data = info;
836 info->bat = power_supply_register(&pdev->dev, &fuel_gauge_desc, &psy_cfg);
837 if (IS_ERR(info->bat)) {
838 ret = PTR_ERR(info->bat);
839 dev_err(&pdev->dev, "failed to register battery: %d\n", ret);
840 goto out_free_iio_chan;
843 fuel_gauge_create_debugfs(info);
844 fuel_gauge_init_irq(info);
849 for (i = 0; i < IIO_CHANNEL_NUM; i++)
850 if (!IS_ERR_OR_NULL(info->iio_channel[i]))
851 iio_channel_release(info->iio_channel[i]);
856 static const struct platform_device_id axp288_fg_id_table[] = {
857 { .name = DEV_NAME },
860 MODULE_DEVICE_TABLE(platform, axp288_fg_id_table);
862 static int axp288_fuel_gauge_remove(struct platform_device *pdev)
864 struct axp288_fg_info *info = platform_get_drvdata(pdev);
867 power_supply_unregister(info->bat);
868 fuel_gauge_remove_debugfs(info);
870 for (i = 0; i < AXP288_FG_INTR_NUM; i++)
871 if (info->irq[i] >= 0)
872 free_irq(info->irq[i], info);
874 for (i = 0; i < IIO_CHANNEL_NUM; i++)
875 iio_channel_release(info->iio_channel[i]);
880 static struct platform_driver axp288_fuel_gauge_driver = {
881 .probe = axp288_fuel_gauge_probe,
882 .remove = axp288_fuel_gauge_remove,
883 .id_table = axp288_fg_id_table,
889 module_platform_driver(axp288_fuel_gauge_driver);
891 MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
892 MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>");
893 MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver");
894 MODULE_LICENSE("GPL");