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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/drivers/power/supply/ds2781_battery.c
....@@ -1,14 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * 1-wire client/driver for the Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC
34  *
45  * Author: Renata Sayakhova <renata@oktetlabs.ru>
56  *
67  * Based on ds2780_battery drivers
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 version 2 as
10
- * published by the Free Software Foundation.
11
- *
128  */
139 
1410 #include <linux/module.h>
....@@ -172,7 +168,7 @@
172168 		return ret;
173169 	/*
174170 	 * The voltage value is located in 10 bits across the voltage MSB
175
-	 * and LSB registers in two's compliment form
171
+	 * and LSB registers in two's complement form
176172 	 * Sign bit of the voltage value is in bit 7 of the voltage MSB register
177173 	 * Bits 9 - 3 of the voltage value are in bits 6 - 0 of the
178174 	 * voltage MSB register
....@@ -201,7 +197,7 @@
201197 		return ret;
202198 	/*
203199 	 * The temperature value is located in 10 bits across the temperature
204
-	 * MSB and LSB registers in two's compliment form
200
+	 * MSB and LSB registers in two's complement form
205201 	 * Sign bit of the temperature value is in bit 7 of the temperature
206202 	 * MSB register
207203 	 * Bits 9 - 3 of the temperature value are in bits 6 - 0 of the
....@@ -246,7 +242,7 @@
246242 
247243 	/*
248244 	 * The current value is located in 16 bits across the current MSB
249
-	 * and LSB registers in two's compliment form
245
+	 * and LSB registers in two's complement form
250246 	 * Sign bit of the current value is in bit 7 of the current MSB register
251247 	 * Bits 14 - 8 of the current value are in bits 6 - 0 of the current
252248 	 * MSB register
....@@ -660,7 +656,7 @@
660656 	return count;
661657 }
662658 
663
-static const struct bin_attribute ds2781_param_eeprom_bin_attr = {
659
+static struct bin_attribute ds2781_param_eeprom_bin_attr = {
664660 	.attr = {
665661 		.name = "param_eeprom",
666662 		.mode = S_IRUGO | S_IWUSR,
....@@ -706,7 +702,7 @@
706702 	return count;
707703 }
708704 
709
-static const struct bin_attribute ds2781_user_eeprom_bin_attr = {
705
+static struct bin_attribute ds2781_user_eeprom_bin_attr = {
710706 	.attr = {
711707 		.name = "user_eeprom",
712708 		.mode = S_IRUGO | S_IWUSR,
....@@ -725,8 +721,7 @@
725721 static DEVICE_ATTR(pio_pin, S_IRUGO | S_IWUSR, ds2781_get_pio_pin,
726722 	ds2781_set_pio_pin);
727723 
728
-
729
-static struct attribute *ds2781_attributes[] = {
724
+static struct attribute *ds2781_sysfs_attrs[] = {
730725 	&dev_attr_pmod_enabled.attr,
731726 	&dev_attr_sense_resistor_value.attr,
732727 	&dev_attr_rsgain_setting.attr,
....@@ -734,14 +729,26 @@
734729 	NULL
735730 };
736731 
737
-static const struct attribute_group ds2781_attr_group = {
738
-	.attrs = ds2781_attributes,
732
+static struct bin_attribute *ds2781_sysfs_bin_attrs[] = {
733
+	&ds2781_param_eeprom_bin_attr,
734
+	&ds2781_user_eeprom_bin_attr,
735
+	NULL,
736
+};
737
+
738
+static const struct attribute_group ds2781_sysfs_group = {
739
+	.attrs = ds2781_sysfs_attrs,
740
+	.bin_attrs = ds2781_sysfs_bin_attrs,
741
+
742
+};
743
+
744
+static const struct attribute_group *ds2781_sysfs_groups[] = {
745
+	&ds2781_sysfs_group,
746
+	NULL,
739747 };
740748 
741749 static int ds2781_battery_probe(struct platform_device *pdev)
742750 {
743751 	struct power_supply_config psy_cfg = {};
744
-	int ret = 0;
745752 	struct ds2781_device_info *dev_info;
746753 
747754 	dev_info = devm_kzalloc(&pdev->dev, sizeof(*dev_info), GFP_KERNEL);
....@@ -759,61 +766,15 @@
759766 	dev_info->bat_desc.get_property	= ds2781_battery_get_property;
760767 
761768 	psy_cfg.drv_data		= dev_info;
769
+	psy_cfg.attr_grp		= ds2781_sysfs_groups;
762770 
763
-	dev_info->bat = power_supply_register(&pdev->dev, &dev_info->bat_desc,
764
-						&psy_cfg);
771
+	dev_info->bat = devm_power_supply_register(&pdev->dev,
772
+						   &dev_info->bat_desc,
773
+						   &psy_cfg);
765774 	if (IS_ERR(dev_info->bat)) {
766775 		dev_err(dev_info->dev, "failed to register battery\n");
767
-		ret = PTR_ERR(dev_info->bat);
768
-		goto fail;
776
+		return PTR_ERR(dev_info->bat);
769777 	}
770
-
771
-	ret = sysfs_create_group(&dev_info->bat->dev.kobj, &ds2781_attr_group);
772
-	if (ret) {
773
-		dev_err(dev_info->dev, "failed to create sysfs group\n");
774
-		goto fail_unregister;
775
-	}
776
-
777
-	ret = sysfs_create_bin_file(&dev_info->bat->dev.kobj,
778
-					&ds2781_param_eeprom_bin_attr);
779
-	if (ret) {
780
-		dev_err(dev_info->dev,
781
-				"failed to create param eeprom bin file");
782
-		goto fail_remove_group;
783
-	}
784
-
785
-	ret = sysfs_create_bin_file(&dev_info->bat->dev.kobj,
786
-					&ds2781_user_eeprom_bin_attr);
787
-	if (ret) {
788
-		dev_err(dev_info->dev,
789
-				"failed to create user eeprom bin file");
790
-		goto fail_remove_bin_file;
791
-	}
792
-
793
-	return 0;
794
-
795
-fail_remove_bin_file:
796
-	sysfs_remove_bin_file(&dev_info->bat->dev.kobj,
797
-				&ds2781_param_eeprom_bin_attr);
798
-fail_remove_group:
799
-	sysfs_remove_group(&dev_info->bat->dev.kobj, &ds2781_attr_group);
800
-fail_unregister:
801
-	power_supply_unregister(dev_info->bat);
802
-fail:
803
-	return ret;
804
-}
805
-
806
-static int ds2781_battery_remove(struct platform_device *pdev)
807
-{
808
-	struct ds2781_device_info *dev_info = platform_get_drvdata(pdev);
809
-
810
-	/*
811
-	 * Remove attributes before unregistering power supply
812
-	 * because 'bat' will be freed on power_supply_unregister() call.
813
-	 */
814
-	sysfs_remove_group(&dev_info->bat->dev.kobj, &ds2781_attr_group);
815
-
816
-	power_supply_unregister(dev_info->bat);
817778 
818779 	return 0;
819780 }
....@@ -823,12 +784,11 @@
823784 		.name = "ds2781-battery",
824785 	},
825786 	.probe	  = ds2781_battery_probe,
826
-	.remove   = ds2781_battery_remove,
827787 };
828788 module_platform_driver(ds2781_battery_driver);
829789 
830790 MODULE_LICENSE("GPL");
831791 MODULE_AUTHOR("Renata Sayakhova <renata@oktetlabs.ru>");
832
-MODULE_DESCRIPTION("Maxim/Dallas DS2781 Stand-Alone Fuel Gauage IC driver");
792
+MODULE_DESCRIPTION("Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC driver");
833793 MODULE_ALIAS("platform:ds2781-battery");
834794