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2024-05-10 ee930fffee469d076998274a2ca55e13dc1efb67 
 kernel/drivers/power/supply/ds2780_battery.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * 1-wire client/driver for the Maxim/Dallas DS2780 Stand-Alone Fuel Gauge IC
34  *
....@@ -6,11 +7,6 @@
67  * Author: Clifton Barnes <cabarnes@indesign-llc.com>
78  *
89  * Based on ds2760_battery and ds2782_battery drivers
9
- *
10
- * This program is free software; you can redistribute it and/or modify
11
- * it under the terms of the GNU General Public License version 2 as
12
- * published by the Free Software Foundation.
13
- *
1410  */
1511 
1612 #include <linux/module.h>
....@@ -164,7 +160,7 @@
164160 
165161 	/*
166162 	 * The voltage value is located in 10 bits across the voltage MSB
167
-	 * and LSB registers in two's compliment form
163
+	 * and LSB registers in two's complement form
168164 	 * Sign bit of the voltage value is in bit 7 of the voltage MSB register
169165 	 * Bits 9 - 3 of the voltage value are in bits 6 - 0 of the
170166 	 * voltage MSB register
....@@ -192,7 +188,7 @@
192188 
193189 	/*
194190 	 * The temperature value is located in 10 bits across the temperature
195
-	 * MSB and LSB registers in two's compliment form
191
+	 * MSB and LSB registers in two's complement form
196192 	 * Sign bit of the temperature value is in bit 7 of the temperature
197193 	 * MSB register
198194 	 * Bits 9 - 3 of the temperature value are in bits 6 - 0 of the
....@@ -245,7 +241,7 @@
245241 
246242 	/*
247243 	 * The current value is located in 16 bits across the current MSB
248
-	 * and LSB registers in two's compliment form
244
+	 * and LSB registers in two's complement form
249245 	 * Sign bit of the current value is in bit 7 of the current MSB register
250246 	 * Bits 14 - 8 of the current value are in bits 6 - 0 of the current
251247 	 * MSB register
....@@ -658,7 +654,7 @@
658654 	return count;
659655 }
660656 
661
-static const struct bin_attribute ds2780_param_eeprom_bin_attr = {
657
+static struct bin_attribute ds2780_param_eeprom_bin_attr = {
662658 	.attr = {
663659 		.name = "param_eeprom",
664660 		.mode = S_IRUGO | S_IWUSR,
....@@ -703,7 +699,7 @@
703699 	return count;
704700 }
705701 
706
-static const struct bin_attribute ds2780_user_eeprom_bin_attr = {
702
+static struct bin_attribute ds2780_user_eeprom_bin_attr = {
707703 	.attr = {
708704 		.name = "user_eeprom",
709705 		.mode = S_IRUGO | S_IWUSR,
....@@ -722,8 +718,7 @@
722718 static DEVICE_ATTR(pio_pin, S_IRUGO | S_IWUSR, ds2780_get_pio_pin,
723719 	ds2780_set_pio_pin);
724720 
725
-
726
-static struct attribute *ds2780_attributes[] = {
721
+static struct attribute *ds2780_sysfs_attrs[] = {
727722 	&dev_attr_pmod_enabled.attr,
728723 	&dev_attr_sense_resistor_value.attr,
729724 	&dev_attr_rsgain_setting.attr,
....@@ -731,21 +726,30 @@
731726 	NULL
732727 };
733728 
734
-static const struct attribute_group ds2780_attr_group = {
735
-	.attrs = ds2780_attributes,
729
+static struct bin_attribute *ds2780_sysfs_bin_attrs[] = {
730
+	&ds2780_param_eeprom_bin_attr,
731
+	&ds2780_user_eeprom_bin_attr,
732
+	NULL
733
+};
734
+
735
+static const struct attribute_group ds2780_sysfs_group = {
736
+	.attrs = ds2780_sysfs_attrs,
737
+	.bin_attrs = ds2780_sysfs_bin_attrs,
738
+};
739
+
740
+static const struct attribute_group *ds2780_sysfs_groups[] = {
741
+	&ds2780_sysfs_group,
742
+	NULL,
736743 };
737744 
738745 static int ds2780_battery_probe(struct platform_device *pdev)
739746 {
740747 	struct power_supply_config psy_cfg = {};
741
-	int ret = 0;
742748 	struct ds2780_device_info *dev_info;
743749 
744750 	dev_info = devm_kzalloc(&pdev->dev, sizeof(*dev_info), GFP_KERNEL);
745
-	if (!dev_info) {
746
-		ret = -ENOMEM;
747
-		goto fail;
748
-	}
751
+	if (!dev_info)
752
+		return -ENOMEM;
749753 
750754 	platform_set_drvdata(pdev, dev_info);
751755 
....@@ -758,61 +762,15 @@
758762 	dev_info->bat_desc.get_property	= ds2780_battery_get_property;
759763 
760764 	psy_cfg.drv_data		= dev_info;
765
+	psy_cfg.attr_grp		= ds2780_sysfs_groups;
761766 
762
-	dev_info->bat = power_supply_register(&pdev->dev, &dev_info->bat_desc,
763
-					      &psy_cfg);
767
+	dev_info->bat = devm_power_supply_register(&pdev->dev,
768
+						   &dev_info->bat_desc,
769
+						   &psy_cfg);
764770 	if (IS_ERR(dev_info->bat)) {
765771 		dev_err(dev_info->dev, "failed to register battery\n");
766
-		ret = PTR_ERR(dev_info->bat);
767
-		goto fail;
772
+		return PTR_ERR(dev_info->bat);
768773 	}
769
-
770
-	ret = sysfs_create_group(&dev_info->bat->dev.kobj, &ds2780_attr_group);
771
-	if (ret) {
772
-		dev_err(dev_info->dev, "failed to create sysfs group\n");
773
-		goto fail_unregister;
774
-	}
775
-
776
-	ret = sysfs_create_bin_file(&dev_info->bat->dev.kobj,
777
-					&ds2780_param_eeprom_bin_attr);
778
-	if (ret) {
779
-		dev_err(dev_info->dev,
780
-				"failed to create param eeprom bin file");
781
-		goto fail_remove_group;
782
-	}
783
-
784
-	ret = sysfs_create_bin_file(&dev_info->bat->dev.kobj,
785
-					&ds2780_user_eeprom_bin_attr);
786
-	if (ret) {
787
-		dev_err(dev_info->dev,
788
-				"failed to create user eeprom bin file");
789
-		goto fail_remove_bin_file;
790
-	}
791
-
792
-	return 0;
793
-
794
-fail_remove_bin_file:
795
-	sysfs_remove_bin_file(&dev_info->bat->dev.kobj,
796
-				&ds2780_param_eeprom_bin_attr);
797
-fail_remove_group:
798
-	sysfs_remove_group(&dev_info->bat->dev.kobj, &ds2780_attr_group);
799
-fail_unregister:
800
-	power_supply_unregister(dev_info->bat);
801
-fail:
802
-	return ret;
803
-}
804
-
805
-static int ds2780_battery_remove(struct platform_device *pdev)
806
-{
807
-	struct ds2780_device_info *dev_info = platform_get_drvdata(pdev);
808
-
809
-	/*
810
-	 * Remove attributes before unregistering power supply
811
-	 * because 'bat' will be freed on power_supply_unregister() call.
812
-	 */
813
-	sysfs_remove_group(&dev_info->bat->dev.kobj, &ds2780_attr_group);
814
-
815
-	power_supply_unregister(dev_info->bat);
816774 
817775 	return 0;
818776 }
....@@ -822,12 +780,11 @@
822780 		.name = "ds2780-battery",
823781 	},
824782 	.probe	  = ds2780_battery_probe,
825
-	.remove   = ds2780_battery_remove,
826783 };
827784 
828785 module_platform_driver(ds2780_battery_driver);
829786 
830787 MODULE_LICENSE("GPL");
831788 MODULE_AUTHOR("Clifton Barnes <cabarnes@indesign-llc.com>");
832
-MODULE_DESCRIPTION("Maxim/Dallas DS2780 Stand-Alone Fuel Gauage IC driver");
789
+MODULE_DESCRIPTION("Maxim/Dallas DS2780 Stand-Alone Fuel Gauge IC driver");
833790 MODULE_ALIAS("platform:ds2780-battery");