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abd46274 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
44b4dc61 K |
2 | /* |
3 | * Driver for TPS65218 Integrated power management chipsets | |
4 | * | |
4f4ed454 | 5 | * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/ |
44b4dc61 K |
6 | */ |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/device.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/platform_device.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/i2c.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/regmap.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/of.h> | |
44b4dc61 K |
18 | #include <linux/irq.h> |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/mutex.h> | |
21 | ||
22 | #include <linux/mfd/core.h> | |
23 | #include <linux/mfd/tps65218.h> | |
24 | ||
25 | #define TPS65218_PASSWORD_REGS_UNLOCK 0x7D | |
26 | ||
4531156d K |
27 | static const struct mfd_cell tps65218_cells[] = { |
28 | { | |
29 | .name = "tps65218-pwrbutton", | |
30 | .of_compatible = "ti,tps65218-pwrbutton", | |
31 | }, | |
32 | { | |
33 | .name = "tps65218-gpio", | |
34 | .of_compatible = "ti,tps65218-gpio", | |
35 | }, | |
36 | { .name = "tps65218-regulator", }, | |
37 | }; | |
38 | ||
44b4dc61 K |
39 | /** |
40 | * tps65218_reg_write: Write a single tps65218 register. | |
41 | * | |
9c3739ee | 42 | * @tps: Device to write to. |
44b4dc61 K |
43 | * @reg: Register to write to. |
44 | * @val: Value to write. | |
45 | * @level: Password protected level | |
46 | */ | |
47 | int tps65218_reg_write(struct tps65218 *tps, unsigned int reg, | |
48 | unsigned int val, unsigned int level) | |
49 | { | |
50 | int ret; | |
51 | unsigned int xor_reg_val; | |
52 | ||
53 | switch (level) { | |
54 | case TPS65218_PROTECT_NONE: | |
55 | return regmap_write(tps->regmap, reg, val); | |
56 | case TPS65218_PROTECT_L1: | |
57 | xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK; | |
58 | ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD, | |
59 | xor_reg_val); | |
60 | if (ret < 0) | |
61 | return ret; | |
62 | ||
63 | return regmap_write(tps->regmap, reg, val); | |
64 | default: | |
65 | return -EINVAL; | |
66 | } | |
67 | } | |
68 | EXPORT_SYMBOL_GPL(tps65218_reg_write); | |
69 | ||
70 | /** | |
71 | * tps65218_update_bits: Modify bits w.r.t mask, val and level. | |
72 | * | |
9c3739ee | 73 | * @tps: Device to write to. |
44b4dc61 K |
74 | * @reg: Register to read-write to. |
75 | * @mask: Mask. | |
76 | * @val: Value to write. | |
77 | * @level: Password protected level | |
78 | */ | |
79 | static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg, | |
80 | unsigned int mask, unsigned int val, unsigned int level) | |
81 | { | |
82 | int ret; | |
83 | unsigned int data; | |
84 | ||
0aced355 | 85 | ret = regmap_read(tps->regmap, reg, &data); |
44b4dc61 K |
86 | if (ret) { |
87 | dev_err(tps->dev, "Read from reg 0x%x failed\n", reg); | |
88 | return ret; | |
89 | } | |
90 | ||
91 | data &= ~mask; | |
92 | data |= val & mask; | |
93 | ||
94 | mutex_lock(&tps->tps_lock); | |
95 | ret = tps65218_reg_write(tps, reg, data, level); | |
96 | if (ret) | |
97 | dev_err(tps->dev, "Write for reg 0x%x failed\n", reg); | |
98 | mutex_unlock(&tps->tps_lock); | |
99 | ||
100 | return ret; | |
101 | } | |
102 | ||
103 | int tps65218_set_bits(struct tps65218 *tps, unsigned int reg, | |
104 | unsigned int mask, unsigned int val, unsigned int level) | |
105 | { | |
106 | return tps65218_update_bits(tps, reg, mask, val, level); | |
107 | } | |
108 | EXPORT_SYMBOL_GPL(tps65218_set_bits); | |
109 | ||
110 | int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg, | |
111 | unsigned int mask, unsigned int level) | |
112 | { | |
113 | return tps65218_update_bits(tps, reg, mask, 0, level); | |
114 | } | |
115 | EXPORT_SYMBOL_GPL(tps65218_clear_bits); | |
116 | ||
773328da FB |
117 | static const struct regmap_range tps65218_yes_ranges[] = { |
118 | regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2), | |
119 | regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS), | |
120 | }; | |
121 | ||
122 | static const struct regmap_access_table tps65218_volatile_table = { | |
123 | .yes_ranges = tps65218_yes_ranges, | |
124 | .n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges), | |
125 | }; | |
126 | ||
18bb399f | 127 | static const struct regmap_config tps65218_regmap_config = { |
44b4dc61 K |
128 | .reg_bits = 8, |
129 | .val_bits = 8, | |
2e9a3fc2 | 130 | .cache_type = REGCACHE_MAPLE, |
773328da | 131 | .volatile_table = &tps65218_volatile_table, |
44b4dc61 K |
132 | }; |
133 | ||
134 | static const struct regmap_irq tps65218_irqs[] = { | |
135 | /* INT1 IRQs */ | |
136 | [TPS65218_PRGC_IRQ] = { | |
137 | .mask = TPS65218_INT1_PRGC, | |
138 | }, | |
139 | [TPS65218_CC_AQC_IRQ] = { | |
140 | .mask = TPS65218_INT1_CC_AQC, | |
141 | }, | |
142 | [TPS65218_HOT_IRQ] = { | |
143 | .mask = TPS65218_INT1_HOT, | |
144 | }, | |
145 | [TPS65218_PB_IRQ] = { | |
146 | .mask = TPS65218_INT1_PB, | |
147 | }, | |
148 | [TPS65218_AC_IRQ] = { | |
149 | .mask = TPS65218_INT1_AC, | |
150 | }, | |
151 | [TPS65218_VPRG_IRQ] = { | |
152 | .mask = TPS65218_INT1_VPRG, | |
153 | }, | |
154 | [TPS65218_INVALID1_IRQ] = { | |
155 | }, | |
156 | [TPS65218_INVALID2_IRQ] = { | |
157 | }, | |
158 | /* INT2 IRQs*/ | |
159 | [TPS65218_LS1_I_IRQ] = { | |
160 | .mask = TPS65218_INT2_LS1_I, | |
161 | .reg_offset = 1, | |
162 | }, | |
163 | [TPS65218_LS2_I_IRQ] = { | |
164 | .mask = TPS65218_INT2_LS2_I, | |
165 | .reg_offset = 1, | |
166 | }, | |
167 | [TPS65218_LS3_I_IRQ] = { | |
168 | .mask = TPS65218_INT2_LS3_I, | |
169 | .reg_offset = 1, | |
170 | }, | |
171 | [TPS65218_LS1_F_IRQ] = { | |
172 | .mask = TPS65218_INT2_LS1_F, | |
173 | .reg_offset = 1, | |
174 | }, | |
175 | [TPS65218_LS2_F_IRQ] = { | |
176 | .mask = TPS65218_INT2_LS2_F, | |
177 | .reg_offset = 1, | |
178 | }, | |
179 | [TPS65218_LS3_F_IRQ] = { | |
180 | .mask = TPS65218_INT2_LS3_F, | |
181 | .reg_offset = 1, | |
182 | }, | |
183 | [TPS65218_INVALID3_IRQ] = { | |
184 | }, | |
185 | [TPS65218_INVALID4_IRQ] = { | |
186 | }, | |
187 | }; | |
188 | ||
189 | static struct regmap_irq_chip tps65218_irq_chip = { | |
190 | .name = "tps65218", | |
191 | .irqs = tps65218_irqs, | |
192 | .num_irqs = ARRAY_SIZE(tps65218_irqs), | |
193 | ||
194 | .num_regs = 2, | |
195 | .mask_base = TPS65218_REG_INT_MASK1, | |
f29ae369 | 196 | .status_base = TPS65218_REG_INT1, |
44b4dc61 K |
197 | }; |
198 | ||
199 | static const struct of_device_id of_tps65218_match_table[] = { | |
200 | { .compatible = "ti,tps65218", }, | |
8320513e | 201 | {} |
44b4dc61 | 202 | }; |
4895e493 | 203 | MODULE_DEVICE_TABLE(of, of_tps65218_match_table); |
44b4dc61 | 204 | |
d57f7287 CH |
205 | static int tps65218_voltage_set_strict(struct tps65218 *tps) |
206 | { | |
207 | u32 strict; | |
208 | ||
209 | if (of_property_read_u32(tps->dev->of_node, | |
210 | "ti,strict-supply-voltage-supervision", | |
211 | &strict)) | |
212 | return 0; | |
213 | ||
214 | if (strict != 0 && strict != 1) { | |
215 | dev_err(tps->dev, | |
216 | "Invalid ti,strict-supply-voltage-supervision value\n"); | |
217 | return -EINVAL; | |
218 | } | |
219 | ||
220 | tps65218_update_bits(tps, TPS65218_REG_CONFIG1, | |
221 | TPS65218_CONFIG1_STRICT, | |
222 | strict ? TPS65218_CONFIG1_STRICT : 0, | |
223 | TPS65218_PROTECT_L1); | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static int tps65218_voltage_set_uv_hyst(struct tps65218 *tps) | |
228 | { | |
229 | u32 hyst; | |
230 | ||
231 | if (of_property_read_u32(tps->dev->of_node, | |
232 | "ti,under-voltage-hyst-microvolt", &hyst)) | |
233 | return 0; | |
234 | ||
235 | if (hyst != 400000 && hyst != 200000) { | |
236 | dev_err(tps->dev, | |
237 | "Invalid ti,under-voltage-hyst-microvolt value\n"); | |
238 | return -EINVAL; | |
239 | } | |
240 | ||
241 | tps65218_update_bits(tps, TPS65218_REG_CONFIG2, | |
242 | TPS65218_CONFIG2_UVLOHYS, | |
243 | hyst == 400000 ? TPS65218_CONFIG2_UVLOHYS : 0, | |
244 | TPS65218_PROTECT_L1); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static int tps65218_voltage_set_uvlo(struct tps65218 *tps) | |
249 | { | |
250 | u32 uvlo; | |
251 | int uvloval; | |
252 | ||
253 | if (of_property_read_u32(tps->dev->of_node, | |
254 | "ti,under-voltage-limit-microvolt", &uvlo)) | |
255 | return 0; | |
256 | ||
257 | switch (uvlo) { | |
258 | case 2750000: | |
259 | uvloval = TPS65218_CONFIG1_UVLO_2750000; | |
260 | break; | |
261 | case 2950000: | |
262 | uvloval = TPS65218_CONFIG1_UVLO_2950000; | |
263 | break; | |
264 | case 3250000: | |
265 | uvloval = TPS65218_CONFIG1_UVLO_3250000; | |
266 | break; | |
267 | case 3350000: | |
268 | uvloval = TPS65218_CONFIG1_UVLO_3350000; | |
269 | break; | |
270 | default: | |
271 | dev_err(tps->dev, | |
272 | "Invalid ti,under-voltage-limit-microvolt value\n"); | |
273 | return -EINVAL; | |
274 | } | |
275 | ||
276 | tps65218_update_bits(tps, TPS65218_REG_CONFIG1, | |
277 | TPS65218_CONFIG1_UVLO_MASK, uvloval, | |
278 | TPS65218_PROTECT_L1); | |
279 | return 0; | |
280 | } | |
281 | ||
3d984091 | 282 | static int tps65218_probe(struct i2c_client *client) |
44b4dc61 K |
283 | { |
284 | struct tps65218 *tps; | |
44b4dc61 | 285 | int ret; |
f11fa179 | 286 | unsigned int chipid; |
44b4dc61 | 287 | |
44b4dc61 K |
288 | tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); |
289 | if (!tps) | |
290 | return -ENOMEM; | |
291 | ||
292 | i2c_set_clientdata(client, tps); | |
293 | tps->dev = &client->dev; | |
294 | tps->irq = client->irq; | |
295 | tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config); | |
296 | if (IS_ERR(tps->regmap)) { | |
297 | ret = PTR_ERR(tps->regmap); | |
298 | dev_err(tps->dev, "Failed to allocate register map: %d\n", | |
299 | ret); | |
300 | return ret; | |
301 | } | |
302 | ||
303 | mutex_init(&tps->tps_lock); | |
304 | ||
75d4c5e0 K |
305 | ret = devm_regmap_add_irq_chip(&client->dev, tps->regmap, tps->irq, |
306 | IRQF_ONESHOT, 0, &tps65218_irq_chip, | |
307 | &tps->irq_data); | |
44b4dc61 K |
308 | if (ret < 0) |
309 | return ret; | |
310 | ||
0aced355 | 311 | ret = regmap_read(tps->regmap, TPS65218_REG_CHIPID, &chipid); |
f11fa179 TK |
312 | if (ret) { |
313 | dev_err(tps->dev, "Failed to read chipid: %d\n", ret); | |
314 | return ret; | |
315 | } | |
316 | ||
317 | tps->rev = chipid & TPS65218_CHIPID_REV_MASK; | |
318 | ||
d57f7287 CH |
319 | ret = tps65218_voltage_set_strict(tps); |
320 | if (ret) | |
321 | return ret; | |
322 | ||
323 | ret = tps65218_voltage_set_uvlo(tps); | |
324 | if (ret) | |
325 | return ret; | |
326 | ||
327 | ret = tps65218_voltage_set_uv_hyst(tps); | |
328 | if (ret) | |
329 | return ret; | |
330 | ||
4531156d K |
331 | ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells, |
332 | ARRAY_SIZE(tps65218_cells), NULL, 0, | |
333 | regmap_irq_get_domain(tps->irq_data)); | |
334 | ||
44b4dc61 K |
335 | return ret; |
336 | } | |
337 | ||
44b4dc61 K |
338 | static const struct i2c_device_id tps65218_id_table[] = { |
339 | { "tps65218", TPS65218 }, | |
340 | { }, | |
341 | }; | |
342 | MODULE_DEVICE_TABLE(i2c, tps65218_id_table); | |
343 | ||
344 | static struct i2c_driver tps65218_driver = { | |
345 | .driver = { | |
346 | .name = "tps65218", | |
44b4dc61 K |
347 | .of_match_table = of_tps65218_match_table, |
348 | }, | |
9816d859 | 349 | .probe = tps65218_probe, |
44b4dc61 K |
350 | .id_table = tps65218_id_table, |
351 | }; | |
352 | ||
353 | module_i2c_driver(tps65218_driver); | |
354 | ||
355 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); | |
356 | MODULE_DESCRIPTION("TPS65218 chip family multi-function driver"); | |
357 | MODULE_LICENSE("GPL v2"); |