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44b4dc61 K |
1 | /* |
2 | * Driver for TPS65218 Integrated power management chipsets | |
3 | * | |
4 | * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/ | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
11 | * kind, whether expressed or implied; without even the implied warranty | |
12 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License version 2 for more details. | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/i2c.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/regmap.h> | |
24 | #include <linux/err.h> | |
25 | #include <linux/of.h> | |
26 | #include <linux/of_device.h> | |
27 | #include <linux/irq.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/mutex.h> | |
30 | ||
31 | #include <linux/mfd/core.h> | |
32 | #include <linux/mfd/tps65218.h> | |
33 | ||
34 | #define TPS65218_PASSWORD_REGS_UNLOCK 0x7D | |
35 | ||
4531156d K |
36 | static const struct mfd_cell tps65218_cells[] = { |
37 | { | |
38 | .name = "tps65218-pwrbutton", | |
39 | .of_compatible = "ti,tps65218-pwrbutton", | |
40 | }, | |
41 | { | |
42 | .name = "tps65218-gpio", | |
43 | .of_compatible = "ti,tps65218-gpio", | |
44 | }, | |
45 | { .name = "tps65218-regulator", }, | |
46 | }; | |
47 | ||
44b4dc61 K |
48 | /** |
49 | * tps65218_reg_write: Write a single tps65218 register. | |
50 | * | |
51 | * @tps65218: Device to write to. | |
52 | * @reg: Register to write to. | |
53 | * @val: Value to write. | |
54 | * @level: Password protected level | |
55 | */ | |
56 | int tps65218_reg_write(struct tps65218 *tps, unsigned int reg, | |
57 | unsigned int val, unsigned int level) | |
58 | { | |
59 | int ret; | |
60 | unsigned int xor_reg_val; | |
61 | ||
62 | switch (level) { | |
63 | case TPS65218_PROTECT_NONE: | |
64 | return regmap_write(tps->regmap, reg, val); | |
65 | case TPS65218_PROTECT_L1: | |
66 | xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK; | |
67 | ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD, | |
68 | xor_reg_val); | |
69 | if (ret < 0) | |
70 | return ret; | |
71 | ||
72 | return regmap_write(tps->regmap, reg, val); | |
73 | default: | |
74 | return -EINVAL; | |
75 | } | |
76 | } | |
77 | EXPORT_SYMBOL_GPL(tps65218_reg_write); | |
78 | ||
79 | /** | |
80 | * tps65218_update_bits: Modify bits w.r.t mask, val and level. | |
81 | * | |
82 | * @tps65218: Device to write to. | |
83 | * @reg: Register to read-write to. | |
84 | * @mask: Mask. | |
85 | * @val: Value to write. | |
86 | * @level: Password protected level | |
87 | */ | |
88 | static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg, | |
89 | unsigned int mask, unsigned int val, unsigned int level) | |
90 | { | |
91 | int ret; | |
92 | unsigned int data; | |
93 | ||
0aced355 | 94 | ret = regmap_read(tps->regmap, reg, &data); |
44b4dc61 K |
95 | if (ret) { |
96 | dev_err(tps->dev, "Read from reg 0x%x failed\n", reg); | |
97 | return ret; | |
98 | } | |
99 | ||
100 | data &= ~mask; | |
101 | data |= val & mask; | |
102 | ||
103 | mutex_lock(&tps->tps_lock); | |
104 | ret = tps65218_reg_write(tps, reg, data, level); | |
105 | if (ret) | |
106 | dev_err(tps->dev, "Write for reg 0x%x failed\n", reg); | |
107 | mutex_unlock(&tps->tps_lock); | |
108 | ||
109 | return ret; | |
110 | } | |
111 | ||
112 | int tps65218_set_bits(struct tps65218 *tps, unsigned int reg, | |
113 | unsigned int mask, unsigned int val, unsigned int level) | |
114 | { | |
115 | return tps65218_update_bits(tps, reg, mask, val, level); | |
116 | } | |
117 | EXPORT_SYMBOL_GPL(tps65218_set_bits); | |
118 | ||
119 | int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg, | |
120 | unsigned int mask, unsigned int level) | |
121 | { | |
122 | return tps65218_update_bits(tps, reg, mask, 0, level); | |
123 | } | |
124 | EXPORT_SYMBOL_GPL(tps65218_clear_bits); | |
125 | ||
773328da FB |
126 | static const struct regmap_range tps65218_yes_ranges[] = { |
127 | regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2), | |
128 | regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS), | |
129 | }; | |
130 | ||
131 | static const struct regmap_access_table tps65218_volatile_table = { | |
132 | .yes_ranges = tps65218_yes_ranges, | |
133 | .n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges), | |
134 | }; | |
135 | ||
18bb399f | 136 | static const struct regmap_config tps65218_regmap_config = { |
44b4dc61 K |
137 | .reg_bits = 8, |
138 | .val_bits = 8, | |
139 | .cache_type = REGCACHE_RBTREE, | |
773328da | 140 | .volatile_table = &tps65218_volatile_table, |
44b4dc61 K |
141 | }; |
142 | ||
143 | static const struct regmap_irq tps65218_irqs[] = { | |
144 | /* INT1 IRQs */ | |
145 | [TPS65218_PRGC_IRQ] = { | |
146 | .mask = TPS65218_INT1_PRGC, | |
147 | }, | |
148 | [TPS65218_CC_AQC_IRQ] = { | |
149 | .mask = TPS65218_INT1_CC_AQC, | |
150 | }, | |
151 | [TPS65218_HOT_IRQ] = { | |
152 | .mask = TPS65218_INT1_HOT, | |
153 | }, | |
154 | [TPS65218_PB_IRQ] = { | |
155 | .mask = TPS65218_INT1_PB, | |
156 | }, | |
157 | [TPS65218_AC_IRQ] = { | |
158 | .mask = TPS65218_INT1_AC, | |
159 | }, | |
160 | [TPS65218_VPRG_IRQ] = { | |
161 | .mask = TPS65218_INT1_VPRG, | |
162 | }, | |
163 | [TPS65218_INVALID1_IRQ] = { | |
164 | }, | |
165 | [TPS65218_INVALID2_IRQ] = { | |
166 | }, | |
167 | /* INT2 IRQs*/ | |
168 | [TPS65218_LS1_I_IRQ] = { | |
169 | .mask = TPS65218_INT2_LS1_I, | |
170 | .reg_offset = 1, | |
171 | }, | |
172 | [TPS65218_LS2_I_IRQ] = { | |
173 | .mask = TPS65218_INT2_LS2_I, | |
174 | .reg_offset = 1, | |
175 | }, | |
176 | [TPS65218_LS3_I_IRQ] = { | |
177 | .mask = TPS65218_INT2_LS3_I, | |
178 | .reg_offset = 1, | |
179 | }, | |
180 | [TPS65218_LS1_F_IRQ] = { | |
181 | .mask = TPS65218_INT2_LS1_F, | |
182 | .reg_offset = 1, | |
183 | }, | |
184 | [TPS65218_LS2_F_IRQ] = { | |
185 | .mask = TPS65218_INT2_LS2_F, | |
186 | .reg_offset = 1, | |
187 | }, | |
188 | [TPS65218_LS3_F_IRQ] = { | |
189 | .mask = TPS65218_INT2_LS3_F, | |
190 | .reg_offset = 1, | |
191 | }, | |
192 | [TPS65218_INVALID3_IRQ] = { | |
193 | }, | |
194 | [TPS65218_INVALID4_IRQ] = { | |
195 | }, | |
196 | }; | |
197 | ||
198 | static struct regmap_irq_chip tps65218_irq_chip = { | |
199 | .name = "tps65218", | |
200 | .irqs = tps65218_irqs, | |
201 | .num_irqs = ARRAY_SIZE(tps65218_irqs), | |
202 | ||
203 | .num_regs = 2, | |
204 | .mask_base = TPS65218_REG_INT_MASK1, | |
f29ae369 | 205 | .status_base = TPS65218_REG_INT1, |
44b4dc61 K |
206 | }; |
207 | ||
208 | static const struct of_device_id of_tps65218_match_table[] = { | |
209 | { .compatible = "ti,tps65218", }, | |
8320513e | 210 | {} |
44b4dc61 | 211 | }; |
4895e493 | 212 | MODULE_DEVICE_TABLE(of, of_tps65218_match_table); |
44b4dc61 K |
213 | |
214 | static int tps65218_probe(struct i2c_client *client, | |
215 | const struct i2c_device_id *ids) | |
216 | { | |
217 | struct tps65218 *tps; | |
44b4dc61 | 218 | int ret; |
f11fa179 | 219 | unsigned int chipid; |
44b4dc61 | 220 | |
44b4dc61 K |
221 | tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); |
222 | if (!tps) | |
223 | return -ENOMEM; | |
224 | ||
225 | i2c_set_clientdata(client, tps); | |
226 | tps->dev = &client->dev; | |
227 | tps->irq = client->irq; | |
228 | tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config); | |
229 | if (IS_ERR(tps->regmap)) { | |
230 | ret = PTR_ERR(tps->regmap); | |
231 | dev_err(tps->dev, "Failed to allocate register map: %d\n", | |
232 | ret); | |
233 | return ret; | |
234 | } | |
235 | ||
236 | mutex_init(&tps->tps_lock); | |
237 | ||
238 | ret = regmap_add_irq_chip(tps->regmap, tps->irq, | |
239 | IRQF_ONESHOT, 0, &tps65218_irq_chip, | |
240 | &tps->irq_data); | |
241 | if (ret < 0) | |
242 | return ret; | |
243 | ||
0aced355 | 244 | ret = regmap_read(tps->regmap, TPS65218_REG_CHIPID, &chipid); |
f11fa179 TK |
245 | if (ret) { |
246 | dev_err(tps->dev, "Failed to read chipid: %d\n", ret); | |
247 | return ret; | |
248 | } | |
249 | ||
250 | tps->rev = chipid & TPS65218_CHIPID_REV_MASK; | |
251 | ||
4531156d K |
252 | ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells, |
253 | ARRAY_SIZE(tps65218_cells), NULL, 0, | |
254 | regmap_irq_get_domain(tps->irq_data)); | |
255 | ||
44b4dc61 K |
256 | if (ret < 0) |
257 | goto err_irq; | |
258 | ||
259 | return 0; | |
260 | ||
261 | err_irq: | |
262 | regmap_del_irq_chip(tps->irq, tps->irq_data); | |
263 | ||
264 | return ret; | |
265 | } | |
266 | ||
267 | static int tps65218_remove(struct i2c_client *client) | |
268 | { | |
269 | struct tps65218 *tps = i2c_get_clientdata(client); | |
270 | ||
271 | regmap_del_irq_chip(tps->irq, tps->irq_data); | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | static const struct i2c_device_id tps65218_id_table[] = { | |
277 | { "tps65218", TPS65218 }, | |
278 | { }, | |
279 | }; | |
280 | MODULE_DEVICE_TABLE(i2c, tps65218_id_table); | |
281 | ||
282 | static struct i2c_driver tps65218_driver = { | |
283 | .driver = { | |
284 | .name = "tps65218", | |
44b4dc61 K |
285 | .of_match_table = of_tps65218_match_table, |
286 | }, | |
287 | .probe = tps65218_probe, | |
288 | .remove = tps65218_remove, | |
289 | .id_table = tps65218_id_table, | |
290 | }; | |
291 | ||
292 | module_i2c_driver(tps65218_driver); | |
293 | ||
294 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); | |
295 | MODULE_DESCRIPTION("TPS65218 chip family multi-function driver"); | |
296 | MODULE_LICENSE("GPL v2"); |