1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * TI LP8788 MFD - core interface |
4 | * |
5 | * Copyright 2012 Texas Instruments |
6 | * |
7 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> |
8 | */ |
9 | |
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 | |
37 | static const struct resource chg_irqs[] = { |
38 | /* Charger Interrupts */ |
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 | /* Power Routing Switch Interrupts */ |
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 | /* Battery Interrupts */ |
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 | |
61 | static const 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 | |
70 | static const struct mfd_cell lp8788_devs[] = { |
71 | /* 4 bucks */ |
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 | /* 12 digital ldos */ |
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 | /* 10 analog ldos */ |
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 | /* ADC */ |
104 | MFD_DEV_SIMPLE(ADC), |
105 | |
106 | /* battery charger */ |
107 | MFD_DEV_WITH_RESOURCE(CHARGER, chg_irqs, ARRAY_SIZE(chg_irqs)), |
108 | |
109 | /* rtc */ |
110 | MFD_DEV_WITH_RESOURCE(RTC, rtc_irqs, ARRAY_SIZE(rtc_irqs)), |
111 | |
112 | /* backlight */ |
113 | MFD_DEV_SIMPLE(BACKLIGHT), |
114 | |
115 | /* current sink for vibrator */ |
116 | MFD_DEV_SIMPLE(VIBRATOR), |
117 | |
118 | /* current sink for keypad LED */ |
119 | MFD_DEV_SIMPLE(KEYLED), |
120 | }; |
121 | |
122 | int lp8788_read_byte(struct lp8788 *lp, u8 reg, u8 *data) |
123 | { |
124 | int ret; |
125 | unsigned int val; |
126 | |
127 | ret = regmap_read(map: lp->regmap, reg, val: &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 | } |
136 | EXPORT_SYMBOL_GPL(lp8788_read_byte); |
137 | |
138 | int lp8788_read_multi_bytes(struct lp8788 *lp, u8 reg, u8 *data, size_t count) |
139 | { |
140 | return regmap_bulk_read(map: lp->regmap, reg, val: data, val_count: count); |
141 | } |
142 | EXPORT_SYMBOL_GPL(lp8788_read_multi_bytes); |
143 | |
144 | int lp8788_write_byte(struct lp8788 *lp, u8 reg, u8 data) |
145 | { |
146 | return regmap_write(map: lp->regmap, reg, val: data); |
147 | } |
148 | EXPORT_SYMBOL_GPL(lp8788_write_byte); |
149 | |
150 | int lp8788_update_bits(struct lp8788 *lp, u8 reg, u8 mask, u8 data) |
151 | { |
152 | return regmap_update_bits(map: lp->regmap, reg, mask, val: data); |
153 | } |
154 | EXPORT_SYMBOL_GPL(lp8788_update_bits); |
155 | |
156 | static 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 | |
163 | static const struct regmap_config lp8788_regmap_config = { |
164 | .reg_bits = 8, |
165 | .val_bits = 8, |
166 | .max_register = MAX_LP8788_REGISTERS, |
167 | }; |
168 | |
169 | static int lp8788_probe(struct i2c_client *cl) |
170 | { |
171 | struct lp8788 *lp; |
172 | struct lp8788_platform_data *pdata = dev_get_platdata(dev: &cl->dev); |
173 | int ret; |
174 | |
175 | lp = devm_kzalloc(dev: &cl->dev, size: 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(ptr: lp->regmap)) { |
181 | ret = PTR_ERR(ptr: 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(client: cl, data: lp); |
189 | |
190 | ret = lp8788_platform_init(lp); |
191 | if (ret) |
192 | return ret; |
193 | |
194 | ret = lp8788_irq_init(lp, chip_irq: cl->irq); |
195 | if (ret) |
196 | return ret; |
197 | |
198 | ret = mfd_add_devices(parent: lp->dev, id: -1, cells: lp8788_devs, |
199 | ARRAY_SIZE(lp8788_devs), NULL, irq_base: 0, NULL); |
200 | if (ret) |
201 | goto err_exit_irq; |
202 | |
203 | return 0; |
204 | |
205 | err_exit_irq: |
206 | lp8788_irq_exit(lp); |
207 | return ret; |
208 | } |
209 | |
210 | static void lp8788_remove(struct i2c_client *cl) |
211 | { |
212 | struct lp8788 *lp = i2c_get_clientdata(client: cl); |
213 | |
214 | mfd_remove_devices(parent: lp->dev); |
215 | lp8788_irq_exit(lp); |
216 | } |
217 | |
218 | static const struct i2c_device_id lp8788_ids[] = { |
219 | {"lp8788" , 0}, |
220 | { } |
221 | }; |
222 | MODULE_DEVICE_TABLE(i2c, lp8788_ids); |
223 | |
224 | static struct i2c_driver lp8788_driver = { |
225 | .driver = { |
226 | .name = "lp8788" , |
227 | }, |
228 | .probe = lp8788_probe, |
229 | .remove = lp8788_remove, |
230 | .id_table = lp8788_ids, |
231 | }; |
232 | |
233 | static int __init lp8788_init(void) |
234 | { |
235 | return i2c_add_driver(&lp8788_driver); |
236 | } |
237 | subsys_initcall(lp8788_init); |
238 | |
239 | static void __exit lp8788_exit(void) |
240 | { |
241 | i2c_del_driver(driver: &lp8788_driver); |
242 | } |
243 | module_exit(lp8788_exit); |
244 | |
245 | MODULE_DESCRIPTION("TI LP8788 MFD Driver" ); |
246 | MODULE_AUTHOR("Milo Kim" ); |
247 | |