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Donggeun Kimbb4ce972011-06-24 19:04:18 +09001/*
2 * max8998_charger.c - Power supply consumer driver for the Maxim 8998/LP3974
3 *
4 * Copyright (C) 2009-2010 Samsung Electronics
5 * MyungJoo Ham <myungjoo.ham@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#include <linux/err.h>
Randy Dunlapd555ab62011-07-29 21:11:43 -070023#include <linux/module.h>
Donggeun Kimbb4ce972011-06-24 19:04:18 +090024#include <linux/slab.h>
25#include <linux/platform_device.h>
26#include <linux/power_supply.h>
27#include <linux/mfd/max8998.h>
28#include <linux/mfd/max8998-private.h>
29
30struct max8998_battery_data {
31 struct device *dev;
32 struct max8998_dev *iodev;
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +010033 struct power_supply *battery;
Donggeun Kimbb4ce972011-06-24 19:04:18 +090034};
35
36static enum power_supply_property max8998_battery_props[] = {
37 POWER_SUPPLY_PROP_PRESENT, /* the presence of battery */
38 POWER_SUPPLY_PROP_ONLINE, /* charger is active or not */
39};
40
41/* Note that the charger control is done by a current regulator "CHARGER" */
42static int max8998_battery_get_property(struct power_supply *psy,
43 enum power_supply_property psp,
44 union power_supply_propval *val)
45{
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +010046 struct max8998_battery_data *max8998 = power_supply_get_drvdata(psy);
Donggeun Kimbb4ce972011-06-24 19:04:18 +090047 struct i2c_client *i2c = max8998->iodev->i2c;
48 int ret;
49 u8 reg;
50
51 switch (psp) {
52 case POWER_SUPPLY_PROP_PRESENT:
53 ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, &reg);
54 if (ret)
55 return ret;
56 if (reg & (1 << 4))
57 val->intval = 0;
58 else
59 val->intval = 1;
60 break;
61 case POWER_SUPPLY_PROP_ONLINE:
62 ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, &reg);
63 if (ret)
64 return ret;
65 if (reg & (1 << 3))
66 val->intval = 0;
67 else
68 val->intval = 1;
69 break;
70 default:
71 return -EINVAL;
72 }
73
74 return 0;
75}
76
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +010077static const struct power_supply_desc max8998_battery_desc = {
78 .name = "max8998_pmic",
79 .type = POWER_SUPPLY_TYPE_BATTERY,
80 .get_property = max8998_battery_get_property,
81 .properties = max8998_battery_props,
82 .num_properties = ARRAY_SIZE(max8998_battery_props),
83};
84
Bill Pembertonc8afa642012-11-19 13:22:23 -050085static int max8998_battery_probe(struct platform_device *pdev)
Donggeun Kimbb4ce972011-06-24 19:04:18 +090086{
87 struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
88 struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +010089 struct power_supply_config psy_cfg = {};
Donggeun Kimbb4ce972011-06-24 19:04:18 +090090 struct max8998_battery_data *max8998;
91 struct i2c_client *i2c;
92 int ret = 0;
93
94 if (!pdata) {
95 dev_err(pdev->dev.parent, "No platform init data supplied\n");
96 return -ENODEV;
97 }
98
Jingoo Hanacfbf472013-03-11 15:35:14 +090099 max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_battery_data),
100 GFP_KERNEL);
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900101 if (!max8998)
102 return -ENOMEM;
103
104 max8998->dev = &pdev->dev;
105 max8998->iodev = iodev;
106 platform_set_drvdata(pdev, max8998);
107 i2c = max8998->iodev->i2c;
108
109 /* Setup "End of Charge" */
110 /* If EOC value equals 0,
111 * remain value set from bootloader or default value */
112 if (pdata->eoc >= 10 && pdata->eoc <= 45) {
113 max8998_update_reg(i2c, MAX8998_REG_CHGR1,
114 (pdata->eoc / 5 - 2) << 5, 0x7 << 5);
115 } else if (pdata->eoc == 0) {
116 dev_dbg(max8998->dev,
117 "EOC value not set: leave it unchanged.\n");
118 } else {
119 dev_err(max8998->dev, "Invalid EOC value\n");
Vaishali Thakkar5e5822f2015-08-13 10:24:41 +0530120 return -EINVAL;
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900121 }
122
123 /* Setup Charge Restart Level */
124 switch (pdata->restart) {
125 case 100:
126 max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x1 << 3, 0x3 << 3);
127 break;
128 case 150:
129 max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x0 << 3, 0x3 << 3);
130 break;
131 case 200:
132 max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x2 << 3, 0x3 << 3);
133 break;
134 case -1:
135 max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x3 << 3, 0x3 << 3);
136 break;
137 case 0:
138 dev_dbg(max8998->dev,
139 "Restart Level not set: leave it unchanged.\n");
140 break;
141 default:
142 dev_err(max8998->dev, "Invalid Restart Level\n");
Vaishali Thakkar5e5822f2015-08-13 10:24:41 +0530143 return -EINVAL;
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900144 }
145
146 /* Setup Charge Full Timeout */
147 switch (pdata->timeout) {
148 case 5:
149 max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x0 << 4, 0x3 << 4);
150 break;
151 case 6:
152 max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x1 << 4, 0x3 << 4);
153 break;
154 case 7:
155 max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x2 << 4, 0x3 << 4);
156 break;
157 case -1:
158 max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x3 << 4, 0x3 << 4);
159 break;
160 case 0:
161 dev_dbg(max8998->dev,
162 "Full Timeout not set: leave it unchanged.\n");
Axel Lin45d116e2011-08-01 07:41:50 +0800163 break;
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900164 default:
165 dev_err(max8998->dev, "Invalid Full Timeout value\n");
Vaishali Thakkar5e5822f2015-08-13 10:24:41 +0530166 return -EINVAL;
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900167 }
168
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +0100169 psy_cfg.drv_data = max8998;
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900170
Vaishali Thakkar5e5822f2015-08-13 10:24:41 +0530171 max8998->battery = devm_power_supply_register(max8998->dev,
172 &max8998_battery_desc,
173 &psy_cfg);
Krzysztof Kozlowski297d7162015-03-12 08:44:11 +0100174 if (IS_ERR(max8998->battery)) {
175 ret = PTR_ERR(max8998->battery);
176 dev_err(max8998->dev, "failed: power supply register: %d\n",
177 ret);
Vaishali Thakkar5e5822f2015-08-13 10:24:41 +0530178 return ret;
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900179 }
180
181 return 0;
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900182}
183
184static const struct platform_device_id max8998_battery_id[] = {
185 { "max8998-battery", TYPE_MAX8998 },
Axel Linc03bfab2011-08-01 07:23:00 +0800186 { }
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900187};
188
189static struct platform_driver max8998_battery_driver = {
190 .driver = {
191 .name = "max8998-battery",
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900192 },
193 .probe = max8998_battery_probe,
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900194 .id_table = max8998_battery_id,
195};
196
Axel Lin300bac72011-11-26 12:01:10 +0800197module_platform_driver(max8998_battery_driver);
Donggeun Kimbb4ce972011-06-24 19:04:18 +0900198
199MODULE_DESCRIPTION("MAXIM 8998 battery control driver");
200MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
201MODULE_LICENSE("GPL");
202MODULE_ALIAS("platform:max8998-battery");