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bb4ce970 DK |
1 | /* |
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> | |
d555ab6b | 23 | #include <linux/module.h> |
bb4ce970 DK |
24 | #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 | ||
30 | struct max8998_battery_data { | |
31 | struct device *dev; | |
32 | struct max8998_dev *iodev; | |
297d716f | 33 | struct power_supply *battery; |
bb4ce970 DK |
34 | }; |
35 | ||
36 | static 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" */ | |
42 | static int max8998_battery_get_property(struct power_supply *psy, | |
43 | enum power_supply_property psp, | |
44 | union power_supply_propval *val) | |
45 | { | |
297d716f | 46 | struct max8998_battery_data *max8998 = power_supply_get_drvdata(psy); |
bb4ce970 DK |
47 | 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, ®); | |
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, ®); | |
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 | ||
297d716f KK |
77 | static 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 | ||
c8afa640 | 85 | static int max8998_battery_probe(struct platform_device *pdev) |
bb4ce970 DK |
86 | { |
87 | struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
88 | struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev); | |
297d716f | 89 | struct power_supply_config psy_cfg = {}; |
bb4ce970 DK |
90 | 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 | ||
acfbf47a JH |
99 | max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_battery_data), |
100 | GFP_KERNEL); | |
bb4ce970 DK |
101 | 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"); | |
5e5822f6 | 120 | return -EINVAL; |
bb4ce970 DK |
121 | } |
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"); | |
5e5822f6 | 143 | return -EINVAL; |
bb4ce970 DK |
144 | } |
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"); | |
45d116ec | 163 | break; |
bb4ce970 DK |
164 | default: |
165 | dev_err(max8998->dev, "Invalid Full Timeout value\n"); | |
5e5822f6 | 166 | return -EINVAL; |
bb4ce970 DK |
167 | } |
168 | ||
297d716f | 169 | psy_cfg.drv_data = max8998; |
bb4ce970 | 170 | |
5e5822f6 VT |
171 | max8998->battery = devm_power_supply_register(max8998->dev, |
172 | &max8998_battery_desc, | |
173 | &psy_cfg); | |
297d716f KK |
174 | if (IS_ERR(max8998->battery)) { |
175 | ret = PTR_ERR(max8998->battery); | |
176 | dev_err(max8998->dev, "failed: power supply register: %d\n", | |
177 | ret); | |
5e5822f6 | 178 | return ret; |
bb4ce970 DK |
179 | } |
180 | ||
bb4ce970 DK |
181 | return 0; |
182 | } | |
183 | ||
184 | static const struct platform_device_id max8998_battery_id[] = { | |
185 | { "max8998-battery", TYPE_MAX8998 }, | |
c03bfabb | 186 | { } |
bb4ce970 DK |
187 | }; |
188 | ||
189 | static struct platform_driver max8998_battery_driver = { | |
190 | .driver = { | |
191 | .name = "max8998-battery", | |
bb4ce970 DK |
192 | }, |
193 | .probe = max8998_battery_probe, | |
bb4ce970 DK |
194 | .id_table = max8998_battery_id, |
195 | }; | |
196 | ||
300bac7f | 197 | module_platform_driver(max8998_battery_driver); |
bb4ce970 DK |
198 | |
199 | MODULE_DESCRIPTION("MAXIM 8998 battery control driver"); | |
200 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
201 | MODULE_LICENSE("GPL"); | |
202 | MODULE_ALIAS("platform:max8998-battery"); |