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1 | /* |
2 | * TI LP8788 MFD - core interface |
3 | * |
4 | * Copyright 2012 Texas Instruments |
5 | * |
6 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> |
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 | * |
12 | */ |
13 | |
14 | #include <linux/err.h> |
15 | #include <linux/i2c.h> |
16 | #include <linux/mfd/core.h> |
17 | #include <linux/mfd/lp8788.h> |
18 | #include <linux/module.h> |
19 | #include <linux/slab.h> |
20 | |
21 | #define MAX_LP8788_REGISTERS 0xA2 |
22 | |
23 | #define MFD_DEV_SIMPLE(_name) \ |
24 | { \ |
25 | .name = LP8788_DEV_##_name, \ |
26 | } |
27 | |
28 | #define MFD_DEV_WITH_ID(_name, _id) \ |
29 | { \ |
30 | .name = LP8788_DEV_##_name, \ |
31 | .id = _id, \ |
32 | } |
33 | |
34 | #define MFD_DEV_WITH_RESOURCE(_name, _resource, num_resource) \ |
35 | { \ |
36 | .name = LP8788_DEV_##_name, \ |
37 | .resources = _resource, \ |
38 | .num_resources = num_resource, \ |
39 | } |
40 | |
41 | static struct resource chg_irqs[] = { |
42 | /* Charger Interrupts */ |
43 | { |
44 | .start = LP8788_INT_CHG_INPUT_STATE, |
45 | .end = LP8788_INT_PRECHG_TIMEOUT, |
46 | .name = LP8788_CHG_IRQ, |
47 | .flags = IORESOURCE_IRQ, |
48 | }, |
49 | /* Power Routing Switch Interrupts */ |
50 | { |
51 | .start = LP8788_INT_ENTER_SYS_SUPPORT, |
52 | .end = LP8788_INT_EXIT_SYS_SUPPORT, |
53 | .name = LP8788_PRSW_IRQ, |
54 | .flags = IORESOURCE_IRQ, |
55 | }, |
56 | /* Battery Interrupts */ |
57 | { |
58 | .start = LP8788_INT_BATT_LOW, |
59 | .end = LP8788_INT_NO_BATT, |
60 | .name = LP8788_BATT_IRQ, |
61 | .flags = IORESOURCE_IRQ, |
62 | }, |
63 | }; |
64 | |
65 | static struct resource rtc_irqs[] = { |
66 | { |
67 | .start = LP8788_INT_RTC_ALARM1, |
68 | .end = LP8788_INT_RTC_ALARM2, |
69 | .name = LP8788_ALM_IRQ, |
70 | .flags = IORESOURCE_IRQ, |
71 | }, |
72 | }; |
73 | |
74 | static struct mfd_cell lp8788_devs[] = { |
75 | /* 4 bucks */ |
76 | MFD_DEV_WITH_ID(BUCK, 1), |
77 | MFD_DEV_WITH_ID(BUCK, 2), |
78 | MFD_DEV_WITH_ID(BUCK, 3), |
79 | MFD_DEV_WITH_ID(BUCK, 4), |
80 | |
81 | /* 12 digital ldos */ |
82 | MFD_DEV_WITH_ID(DLDO, 1), |
83 | MFD_DEV_WITH_ID(DLDO, 2), |
84 | MFD_DEV_WITH_ID(DLDO, 3), |
85 | MFD_DEV_WITH_ID(DLDO, 4), |
86 | MFD_DEV_WITH_ID(DLDO, 5), |
87 | MFD_DEV_WITH_ID(DLDO, 6), |
88 | MFD_DEV_WITH_ID(DLDO, 7), |
89 | MFD_DEV_WITH_ID(DLDO, 8), |
90 | MFD_DEV_WITH_ID(DLDO, 9), |
91 | MFD_DEV_WITH_ID(DLDO, 10), |
92 | MFD_DEV_WITH_ID(DLDO, 11), |
93 | MFD_DEV_WITH_ID(DLDO, 12), |
94 | |
95 | /* 10 analog ldos */ |
96 | MFD_DEV_WITH_ID(ALDO, 1), |
97 | MFD_DEV_WITH_ID(ALDO, 2), |
98 | MFD_DEV_WITH_ID(ALDO, 3), |
99 | MFD_DEV_WITH_ID(ALDO, 4), |
100 | MFD_DEV_WITH_ID(ALDO, 5), |
101 | MFD_DEV_WITH_ID(ALDO, 6), |
102 | MFD_DEV_WITH_ID(ALDO, 7), |
103 | MFD_DEV_WITH_ID(ALDO, 8), |
104 | MFD_DEV_WITH_ID(ALDO, 9), |
105 | MFD_DEV_WITH_ID(ALDO, 10), |
106 | |
107 | /* ADC */ |
108 | MFD_DEV_SIMPLE(ADC), |
109 | |
110 | /* battery charger */ |
111 | MFD_DEV_WITH_RESOURCE(CHARGER, chg_irqs, ARRAY_SIZE(chg_irqs)), |
112 | |
113 | /* rtc */ |
114 | MFD_DEV_WITH_RESOURCE(RTC, rtc_irqs, ARRAY_SIZE(rtc_irqs)), |
115 | |
116 | /* backlight */ |
117 | MFD_DEV_SIMPLE(BACKLIGHT), |
118 | |
119 | /* current sink for vibrator */ |
120 | MFD_DEV_SIMPLE(VIBRATOR), |
121 | |
122 | /* current sink for keypad LED */ |
123 | MFD_DEV_SIMPLE(KEYLED), |
124 | }; |
125 | |
126 | int lp8788_read_byte(struct lp8788 *lp, u8 reg, u8 *data) |
127 | { |
128 | int ret; |
129 | unsigned int val; |
130 | |
131 | ret = regmap_read(lp->regmap, reg, &val); |
132 | if (ret < 0) { |
133 | dev_err(lp->dev, "failed to read 0x%.2x\n", reg); |
134 | return ret; |
135 | } |
136 | |
137 | *data = (u8)val; |
138 | return 0; |
139 | } |
140 | EXPORT_SYMBOL_GPL(lp8788_read_byte); |
141 | |
142 | int lp8788_read_multi_bytes(struct lp8788 *lp, u8 reg, u8 *data, size_t count) |
143 | { |
144 | return regmap_bulk_read(lp->regmap, reg, data, count); |
145 | } |
146 | EXPORT_SYMBOL_GPL(lp8788_read_multi_bytes); |
147 | |
148 | int lp8788_write_byte(struct lp8788 *lp, u8 reg, u8 data) |
149 | { |
150 | return regmap_write(lp->regmap, reg, data); |
151 | } |
152 | EXPORT_SYMBOL_GPL(lp8788_write_byte); |
153 | |
154 | int lp8788_update_bits(struct lp8788 *lp, u8 reg, u8 mask, u8 data) |
155 | { |
156 | return regmap_update_bits(lp->regmap, reg, mask, data); |
157 | } |
158 | EXPORT_SYMBOL_GPL(lp8788_update_bits); |
159 | |
160 | static int lp8788_platform_init(struct lp8788 *lp) |
161 | { |
162 | struct lp8788_platform_data *pdata = lp->pdata; |
163 | |
164 | return (pdata && pdata->init_func) ? pdata->init_func(lp) : 0; |
165 | } |
166 | |
167 | static const struct regmap_config lp8788_regmap_config = { |
168 | .reg_bits = 8, |
169 | .val_bits = 8, |
170 | .max_register = MAX_LP8788_REGISTERS, |
171 | }; |
172 | |
173 | static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id) |
174 | { |
175 | struct lp8788 *lp; |
176 | struct lp8788_platform_data *pdata = cl->dev.platform_data; |
177 | int ret; |
178 | |
179 | lp = devm_kzalloc(&cl->dev, sizeof(struct lp8788), GFP_KERNEL); |
180 | if (!lp) |
181 | return -ENOMEM; |
182 | |
183 | lp->regmap = devm_regmap_init_i2c(cl, &lp8788_regmap_config); |
184 | if (IS_ERR(lp->regmap)) { |
185 | ret = PTR_ERR(lp->regmap); |
186 | dev_err(&cl->dev, "regmap init i2c err: %d\n", ret); |
187 | return ret; |
188 | } |
189 | |
190 | lp->pdata = pdata; |
191 | lp->dev = &cl->dev; |
192 | i2c_set_clientdata(cl, lp); |
193 | |
194 | ret = lp8788_platform_init(lp); |
195 | if (ret) |
196 | return ret; |
197 | |
198 | ret = lp8788_irq_init(lp, cl->irq); |
199 | if (ret) |
200 | return ret; |
201 | |
202 | return mfd_add_devices(lp->dev, -1, lp8788_devs, |
203 | ARRAY_SIZE(lp8788_devs), NULL, 0, NULL); |
204 | } |
205 | |
206 | static int lp8788_remove(struct i2c_client *cl) |
207 | { |
208 | struct lp8788 *lp = i2c_get_clientdata(cl); |
209 | |
210 | mfd_remove_devices(lp->dev); |
211 | lp8788_irq_exit(lp); |
212 | return 0; |
213 | } |
214 | |
215 | static const struct i2c_device_id lp8788_ids[] = { |
216 | {"lp8788", 0}, |
217 | { } |
218 | }; |
219 | MODULE_DEVICE_TABLE(i2c, lp8788_ids); |
220 | |
221 | static struct i2c_driver lp8788_driver = { |
222 | .driver = { |
223 | .name = "lp8788", |
224 | .owner = THIS_MODULE, |
225 | }, |
226 | .probe = lp8788_probe, |
227 | .remove = lp8788_remove, |
228 | .id_table = lp8788_ids, |
229 | }; |
230 | |
231 | static int __init lp8788_init(void) |
232 | { |
233 | return i2c_add_driver(&lp8788_driver); |
234 | } |
235 | subsys_initcall(lp8788_init); |
236 | |
237 | static void __exit lp8788_exit(void) |
238 | { |
239 | i2c_del_driver(&lp8788_driver); |
240 | } |
241 | module_exit(lp8788_exit); |
242 | |
243 | MODULE_DESCRIPTION("TI LP8788 MFD Driver"); |
244 | MODULE_AUTHOR("Milo Kim"); |
245 | MODULE_LICENSE("GPL"); |
246 |
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