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10#include <linux/err.h>
11#include <linux/i2c.h>
12#include <linux/mfd/core.h>
13#include <linux/mfd/lp8788.h>
14#include <linux/module.h>
15#include <linux/slab.h>
16
17#define MAX_LP8788_REGISTERS 0xA2
18
19#define MFD_DEV_SIMPLE(_name) \
20{ \
21 .name = LP8788_DEV_##_name, \
22}
23
24#define MFD_DEV_WITH_ID(_name, _id) \
25{ \
26 .name = LP8788_DEV_##_name, \
27 .id = _id, \
28}
29
30#define MFD_DEV_WITH_RESOURCE(_name, _resource, num_resource) \
31{ \
32 .name = LP8788_DEV_##_name, \
33 .resources = _resource, \
34 .num_resources = num_resource, \
35}
36
37static struct resource chg_irqs[] = {
38
39 {
40 .start = LP8788_INT_CHG_INPUT_STATE,
41 .end = LP8788_INT_PRECHG_TIMEOUT,
42 .name = LP8788_CHG_IRQ,
43 .flags = IORESOURCE_IRQ,
44 },
45
46 {
47 .start = LP8788_INT_ENTER_SYS_SUPPORT,
48 .end = LP8788_INT_EXIT_SYS_SUPPORT,
49 .name = LP8788_PRSW_IRQ,
50 .flags = IORESOURCE_IRQ,
51 },
52
53 {
54 .start = LP8788_INT_BATT_LOW,
55 .end = LP8788_INT_NO_BATT,
56 .name = LP8788_BATT_IRQ,
57 .flags = IORESOURCE_IRQ,
58 },
59};
60
61static struct resource rtc_irqs[] = {
62 {
63 .start = LP8788_INT_RTC_ALARM1,
64 .end = LP8788_INT_RTC_ALARM2,
65 .name = LP8788_ALM_IRQ,
66 .flags = IORESOURCE_IRQ,
67 },
68};
69
70static const struct mfd_cell lp8788_devs[] = {
71
72 MFD_DEV_WITH_ID(BUCK, 1),
73 MFD_DEV_WITH_ID(BUCK, 2),
74 MFD_DEV_WITH_ID(BUCK, 3),
75 MFD_DEV_WITH_ID(BUCK, 4),
76
77
78 MFD_DEV_WITH_ID(DLDO, 1),
79 MFD_DEV_WITH_ID(DLDO, 2),
80 MFD_DEV_WITH_ID(DLDO, 3),
81 MFD_DEV_WITH_ID(DLDO, 4),
82 MFD_DEV_WITH_ID(DLDO, 5),
83 MFD_DEV_WITH_ID(DLDO, 6),
84 MFD_DEV_WITH_ID(DLDO, 7),
85 MFD_DEV_WITH_ID(DLDO, 8),
86 MFD_DEV_WITH_ID(DLDO, 9),
87 MFD_DEV_WITH_ID(DLDO, 10),
88 MFD_DEV_WITH_ID(DLDO, 11),
89 MFD_DEV_WITH_ID(DLDO, 12),
90
91
92 MFD_DEV_WITH_ID(ALDO, 1),
93 MFD_DEV_WITH_ID(ALDO, 2),
94 MFD_DEV_WITH_ID(ALDO, 3),
95 MFD_DEV_WITH_ID(ALDO, 4),
96 MFD_DEV_WITH_ID(ALDO, 5),
97 MFD_DEV_WITH_ID(ALDO, 6),
98 MFD_DEV_WITH_ID(ALDO, 7),
99 MFD_DEV_WITH_ID(ALDO, 8),
100 MFD_DEV_WITH_ID(ALDO, 9),
101 MFD_DEV_WITH_ID(ALDO, 10),
102
103
104 MFD_DEV_SIMPLE(ADC),
105
106
107 MFD_DEV_WITH_RESOURCE(CHARGER, chg_irqs, ARRAY_SIZE(chg_irqs)),
108
109
110 MFD_DEV_WITH_RESOURCE(RTC, rtc_irqs, ARRAY_SIZE(rtc_irqs)),
111
112
113 MFD_DEV_SIMPLE(BACKLIGHT),
114
115
116 MFD_DEV_SIMPLE(VIBRATOR),
117
118
119 MFD_DEV_SIMPLE(KEYLED),
120};
121
122int lp8788_read_byte(struct lp8788 *lp, u8 reg, u8 *data)
123{
124 int ret;
125 unsigned int val;
126
127 ret = regmap_read(lp->regmap, reg, &val);
128 if (ret < 0) {
129 dev_err(lp->dev, "failed to read 0x%.2x\n", reg);
130 return ret;
131 }
132
133 *data = (u8)val;
134 return 0;
135}
136EXPORT_SYMBOL_GPL(lp8788_read_byte);
137
138int lp8788_read_multi_bytes(struct lp8788 *lp, u8 reg, u8 *data, size_t count)
139{
140 return regmap_bulk_read(lp->regmap, reg, data, count);
141}
142EXPORT_SYMBOL_GPL(lp8788_read_multi_bytes);
143
144int lp8788_write_byte(struct lp8788 *lp, u8 reg, u8 data)
145{
146 return regmap_write(lp->regmap, reg, data);
147}
148EXPORT_SYMBOL_GPL(lp8788_write_byte);
149
150int lp8788_update_bits(struct lp8788 *lp, u8 reg, u8 mask, u8 data)
151{
152 return regmap_update_bits(lp->regmap, reg, mask, data);
153}
154EXPORT_SYMBOL_GPL(lp8788_update_bits);
155
156static int lp8788_platform_init(struct lp8788 *lp)
157{
158 struct lp8788_platform_data *pdata = lp->pdata;
159
160 return (pdata && pdata->init_func) ? pdata->init_func(lp) : 0;
161}
162
163static const struct regmap_config lp8788_regmap_config = {
164 .reg_bits = 8,
165 .val_bits = 8,
166 .max_register = MAX_LP8788_REGISTERS,
167};
168
169static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id)
170{
171 struct lp8788 *lp;
172 struct lp8788_platform_data *pdata = dev_get_platdata(&cl->dev);
173 int ret;
174
175 lp = devm_kzalloc(&cl->dev, sizeof(struct lp8788), GFP_KERNEL);
176 if (!lp)
177 return -ENOMEM;
178
179 lp->regmap = devm_regmap_init_i2c(cl, &lp8788_regmap_config);
180 if (IS_ERR(lp->regmap)) {
181 ret = PTR_ERR(lp->regmap);
182 dev_err(&cl->dev, "regmap init i2c err: %d\n", ret);
183 return ret;
184 }
185
186 lp->pdata = pdata;
187 lp->dev = &cl->dev;
188 i2c_set_clientdata(cl, lp);
189
190 ret = lp8788_platform_init(lp);
191 if (ret)
192 return ret;
193
194 ret = lp8788_irq_init(lp, cl->irq);
195 if (ret)
196 return ret;
197
198 return mfd_add_devices(lp->dev, -1, lp8788_devs,
199 ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
200}
201
202static int lp8788_remove(struct i2c_client *cl)
203{
204 struct lp8788 *lp = i2c_get_clientdata(cl);
205
206 mfd_remove_devices(lp->dev);
207 lp8788_irq_exit(lp);
208 return 0;
209}
210
211static const struct i2c_device_id lp8788_ids[] = {
212 {"lp8788", 0},
213 { }
214};
215MODULE_DEVICE_TABLE(i2c, lp8788_ids);
216
217static struct i2c_driver lp8788_driver = {
218 .driver = {
219 .name = "lp8788",
220 },
221 .probe = lp8788_probe,
222 .remove = lp8788_remove,
223 .id_table = lp8788_ids,
224};
225
226static int __init lp8788_init(void)
227{
228 return i2c_add_driver(&lp8788_driver);
229}
230subsys_initcall(lp8788_init);
231
232static void __exit lp8788_exit(void)
233{
234 i2c_del_driver(&lp8788_driver);
235}
236module_exit(lp8788_exit);
237
238MODULE_DESCRIPTION("TI LP8788 MFD Driver");
239MODULE_AUTHOR("Milo Kim");
240MODULE_LICENSE("GPL");
241
