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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c 
 kernel/drivers/power/supply/max17042_battery.c
....@@ -1,26 +1,12 @@
1
-/*
2
- * Fuel gauge driver for Maxim 17042 / 8966 / 8997
3
- *  Note that Maxim 8966 and 8997 are mfd and this is its subdevice.
4
- *
5
- * Copyright (C) 2011 Samsung Electronics
6
- * MyungJoo Ham <myungjoo.ham@samsung.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
10
- * the Free Software Foundation; either version 2 of the License, or
11
- * (at your option) any later version.
12
- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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- *
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- * This driver is based on max17040_battery.c
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- */
1
+// SPDX-License-Identifier: GPL-2.0+
2
+//
3
+// Fuel gauge driver for Maxim 17042 / 8966 / 8997
4
+//  Note that Maxim 8966 and 8997 are mfd and this is its subdevice.
5
+//
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+// Copyright (C) 2011 Samsung Electronics
7
+// MyungJoo Ham <myungjoo.ham@samsung.com>
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+//
9
+// This driver is based on max17040_battery.c
2410 
2511 #include <linux/acpi.h>
2612 #include <linux/init.h>
....@@ -99,6 +85,8 @@
9985 	POWER_SUPPLY_PROP_TEMP_MAX,
10086 	POWER_SUPPLY_PROP_HEALTH,
10187 	POWER_SUPPLY_PROP_SCOPE,
88
+	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
89
+	// these two have to be at the end on the list
10290 	POWER_SUPPLY_PROP_CURRENT_NOW,
10391 	POWER_SUPPLY_PROP_CURRENT_AVG,
10492 };
....@@ -296,6 +284,8 @@
296284 	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
297285 		if (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17042)
298286 			ret = regmap_read(map, MAX17042_V_empty, &data);
287
+		else if (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17055)
288
+			ret = regmap_read(map, MAX17055_V_empty, &data);
299289 		else
300290 			ret = regmap_read(map, MAX17047_V_empty, &data);
301291 		if (ret < 0)
....@@ -426,6 +416,13 @@
426416 			return -EINVAL;
427417 		}
428418 		break;
419
+	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
420
+		ret = regmap_read(map, MAX17042_TTE, &data);
421
+		if (ret < 0)
422
+			return ret;
423
+
424
+		val->intval = data * 5625 / 1000;
425
+		break;
429426 	default:
430427 		return -EINVAL;
431428 	}
....@@ -528,7 +525,7 @@
528525 		regmap_write(map, reg, value);
529526 }
530527 
531
-static inline void max10742_unlock_model(struct max17042_chip *chip)
528
+static inline void max17042_unlock_model(struct max17042_chip *chip)
532529 {
533530 	struct regmap *map = chip->regmap;
534531 
....@@ -536,7 +533,7 @@
536533 	regmap_write(map, MAX17042_MLOCKReg2, MODEL_UNLOCK2);
537534 }
538535 
539
-static inline void max10742_lock_model(struct max17042_chip *chip)
536
+static inline void max17042_lock_model(struct max17042_chip *chip)
540537 {
541538 	struct regmap *map = chip->regmap;
542539 
....@@ -594,7 +591,7 @@
594591 	if (!temp_data)
595592 		return -ENOMEM;
596593 
597
-	max10742_unlock_model(chip);
594
+	max17042_unlock_model(chip);
598595 	max17042_write_model_data(chip, MAX17042_MODELChrTbl,
599596 				table_size);
600597 	max17042_read_model_data(chip, MAX17042_MODELChrTbl, temp_data,
....@@ -606,7 +603,7 @@
606603 		temp_data,
607604 		table_size);
608605 
609
-	max10742_lock_model(chip);
606
+	max17042_lock_model(chip);
610607 	kfree(temp_data);
611608 
612609 	return ret;
....@@ -644,7 +641,8 @@
644641 			config->filter_cfg);
645642 	regmap_write(map, MAX17042_RelaxCFG, config->relax_cfg);
646643 	if (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17047 ||
647
-			chip->chip_type == MAXIM_DEVICE_TYPE_MAX17050)
644
+			chip->chip_type == MAXIM_DEVICE_TYPE_MAX17050 ||
645
+			chip->chip_type == MAXIM_DEVICE_TYPE_MAX17055)
648646 		regmap_write(map, MAX17047_FullSOCThr,
649647 						config->full_soc_thresh);
650648 }
....@@ -775,6 +773,8 @@
775773 
776774 	if (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17042)
777775 		max17042_override_por(map, MAX17042_V_empty, config->vempty);
776
+	if (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17055)
777
+		max17042_override_por(map, MAX17055_V_empty, config->vempty);
778778 	else
779779 		max17042_override_por(map, MAX17047_V_empty, config->vempty);
780780 	max17042_override_por(map, MAX17042_TempNom, config->temp_nom);
....@@ -782,7 +782,10 @@
782782 	max17042_override_por(map, MAX17042_FCTC, config->fctc);
783783 	max17042_override_por(map, MAX17042_RCOMP0, config->rcomp0);
784784 	max17042_override_por(map, MAX17042_TempCo, config->tcompc0);
785
-	if (chip->chip_type) {
785
+	if (chip->chip_type &&
786
+	    ((chip->chip_type == MAXIM_DEVICE_TYPE_MAX17042) ||
787
+	    (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17047) ||
788
+	    (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17050))) {
786789 		max17042_override_por(map, MAX17042_EmptyTempCo,
787790 						config->empty_tempco);
788791 		max17042_override_por(map, MAX17042_K_empty0,
....@@ -872,6 +875,10 @@
872875 		max17042_set_soc_threshold(chip, 1);
873876 	}
874877 
878
+	/* we implicitly handle all alerts via power_supply_changed */
879
+	regmap_clear_bits(chip->regmap, MAX17042_STATUS,
880
+			  0xFFFF & ~(STATUS_POR_BIT | STATUS_BST_BIT));
881
+
875882 	power_supply_changed(chip->battery);
876883 	return IRQ_HANDLED;
877884 }
....@@ -951,7 +958,8 @@
951958 	if (!pdata)
952959 		return pdata;
953960 
954
-	if (chip->chip_type != MAXIM_DEVICE_TYPE_MAX17042) {
961
+	if ((chip->chip_type == MAXIM_DEVICE_TYPE_MAX17047) ||
962
+	    (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17050)) {
955963 		pdata->init_data = max17047_default_pdata_init_regs;
956964 		pdata->num_init_data =
957965 			ARRAY_SIZE(max17047_default_pdata_init_regs);
....@@ -1017,10 +1025,17 @@
10171025 	.num_properties	= ARRAY_SIZE(max17042_battery_props) - 2,
10181026 };
10191027 
1028
+static void max17042_stop_work(void *data)
1029
+{
1030
+	struct max17042_chip *chip = data;
1031
+
1032
+	cancel_work_sync(&chip->work);
1033
+}
1034
+
10201035 static int max17042_probe(struct i2c_client *client,
10211036 			const struct i2c_device_id *id)
10221037 {
1023
-	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1038
+	struct i2c_adapter *adapter = client->adapter;
10241039 	const struct power_supply_desc *max17042_desc = &max17042_psy_desc;
10251040 	struct power_supply_config psy_cfg = {};
10261041 	const struct acpi_device_id *acpi_id = NULL;
....@@ -1123,6 +1138,9 @@
11231138 	regmap_read(chip->regmap, MAX17042_STATUS, &val);
11241139 	if (val & STATUS_POR_BIT) {
11251140 		INIT_WORK(&chip->work, max17042_init_worker);
1141
+		ret = devm_add_action(&client->dev, max17042_stop_work, chip);
1142
+		if (ret)
1143
+			return ret;
11261144 		schedule_work(&chip->work);
11271145 	} else {
11281146 		chip->init_complete = 1;
....@@ -1179,6 +1197,7 @@
11791197 	{ .compatible = "maxim,max17042" },
11801198 	{ .compatible = "maxim,max17047" },
11811199 	{ .compatible = "maxim,max17050" },
1200
+	{ .compatible = "maxim,max17055" },
11821201 	{ },
11831202 };
11841203 MODULE_DEVICE_TABLE(of, max17042_dt_match);
....@@ -1188,6 +1207,7 @@
11881207 	{ "max17042", MAXIM_DEVICE_TYPE_MAX17042 },
11891208 	{ "max17047", MAXIM_DEVICE_TYPE_MAX17047 },
11901209 	{ "max17050", MAXIM_DEVICE_TYPE_MAX17050 },
1210
+	{ "max17055", MAXIM_DEVICE_TYPE_MAX17055 },
11911211 	{ }
11921212 };
11931213 MODULE_DEVICE_TABLE(i2c, max17042_id);