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