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c0216c0e CH |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | ||
3 | #include <linux/bits.h> | |
4 | #include <linux/kernel.h> | |
5 | #include <linux/module.h> | |
6 | #include <linux/of.h> | |
7 | #include <linux/platform_device.h> | |
8 | #include <linux/regmap.h> | |
9 | #include <linux/regulator/driver.h> | |
10 | #include <linux/regulator/machine.h> | |
11 | #include <linux/regulator/of_regulator.h> | |
12 | ||
13 | #define RT5120_REG_PGSTAT 0x03 | |
14 | #define RT5120_REG_CH1VID 0x06 | |
15 | #define RT5120_REG_CH1SLPVID 0x07 | |
16 | #define RT5120_REG_ENABLE 0x08 | |
17 | #define RT5120_REG_MODECTL 0x09 | |
18 | #define RT5120_REG_UVOVPROT 0x0A | |
19 | #define RT5120_REG_SLPCTL 0x0C | |
20 | #define RT5120_REG_INTSTAT 0x1E | |
21 | #define RT5120_REG_DISCHG 0x1F | |
22 | ||
23 | #define RT5120_OUTPG_MASK(rid) BIT(rid + 1) | |
24 | #define RT5120_OUTUV_MASK(rid) BIT(rid + 9) | |
25 | #define RT5120_OUTOV_MASK(rid) BIT(rid + 16) | |
26 | #define RT5120_CH1VID_MASK GENMASK(6, 0) | |
27 | #define RT5120_RIDEN_MASK(rid) BIT(rid + 1) | |
28 | #define RT5120_RADEN_MASK(rid) BIT(rid) | |
29 | #define RT5120_FPWM_MASK(rid) BIT(rid + 1) | |
30 | #define RT5120_UVHICCUP_MASK BIT(1) | |
31 | #define RT5120_OVHICCUP_MASK BIT(0) | |
32 | #define RT5120_HOTDIE_MASK BIT(1) | |
33 | ||
34 | #define RT5120_BUCK1_MINUV 600000 | |
35 | #define RT5120_BUCK1_MAXUV 1393750 | |
36 | #define RT5120_BUCK1_STEPUV 6250 | |
37 | #define RT5120_BUCK1_NUM_VOLT 0x80 | |
38 | ||
39 | #define RT5120_AUTO_MODE 0 | |
40 | #define RT5120_FPWM_MODE 1 | |
41 | ||
42 | enum { | |
43 | RT5120_REGULATOR_BUCK1 = 0, | |
44 | RT5120_REGULATOR_BUCK2, | |
45 | RT5120_REGULATOR_BUCK3, | |
46 | RT5120_REGULATOR_BUCK4, | |
47 | RT5120_REGULATOR_LDO, | |
48 | RT5120_REGULATOR_EXTEN, | |
49 | RT5120_MAX_REGULATOR | |
50 | }; | |
51 | ||
52 | struct rt5120_priv { | |
53 | struct device *dev; | |
54 | struct regmap *regmap; | |
55 | struct regulator_desc rdesc[RT5120_MAX_REGULATOR]; | |
56 | }; | |
57 | ||
58 | static int rt5120_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) | |
59 | { | |
60 | struct regmap *regmap = rdev_get_regmap(rdev); | |
61 | int rid = rdev_get_id(rdev); | |
62 | unsigned int mask = RT5120_FPWM_MASK(rid), val; | |
63 | ||
64 | switch (mode) { | |
65 | case REGULATOR_MODE_NORMAL: | |
66 | val = 0; | |
67 | break; | |
68 | case REGULATOR_MODE_FAST: | |
69 | val = RT5120_FPWM_MASK(rid); | |
70 | break; | |
71 | default: | |
72 | return -EINVAL; | |
73 | } | |
74 | ||
75 | return regmap_update_bits(regmap, RT5120_REG_MODECTL, mask, val); | |
76 | } | |
77 | ||
78 | static unsigned int rt5120_buck_get_mode(struct regulator_dev *rdev) | |
79 | { | |
80 | struct regmap *regmap = rdev_get_regmap(rdev); | |
81 | int ret, rid = rdev_get_id(rdev); | |
82 | unsigned int val; | |
83 | ||
84 | ret = regmap_read(regmap, RT5120_REG_MODECTL, &val); | |
85 | if (ret) | |
86 | return REGULATOR_MODE_INVALID; | |
87 | ||
88 | if (val & RT5120_FPWM_MASK(rid)) | |
89 | return REGULATOR_MODE_FAST; | |
90 | ||
91 | return REGULATOR_MODE_NORMAL; | |
92 | } | |
93 | ||
94 | static int rt5120_regulator_get_error_flags(struct regulator_dev *rdev, | |
95 | unsigned int *flags) | |
96 | { | |
97 | struct regmap *regmap = rdev_get_regmap(rdev); | |
98 | unsigned int stat, hd_stat, cur_flags = 0; | |
99 | int rid = rdev_get_id(rdev), ret; | |
100 | ||
101 | /* | |
102 | * reg 0x03/0x04/0x05 to indicate PG/UV/OV | |
103 | * use block read to descrease I/O xfer time | |
104 | */ | |
105 | ret = regmap_raw_read(regmap, RT5120_REG_PGSTAT, &stat, 3); | |
106 | if (ret) | |
107 | return ret; | |
108 | ||
109 | ret = regmap_read(regmap, RT5120_REG_INTSTAT, &hd_stat); | |
110 | if (ret) | |
111 | return ret; | |
112 | ||
113 | if (!(stat & RT5120_OUTPG_MASK(rid))) { | |
114 | if (stat & RT5120_OUTUV_MASK(rid)) | |
115 | cur_flags |= REGULATOR_ERROR_UNDER_VOLTAGE; | |
116 | ||
117 | if (stat & RT5120_OUTOV_MASK(rid)) | |
118 | cur_flags |= REGULATOR_ERROR_REGULATION_OUT; | |
119 | } | |
120 | ||
121 | if (hd_stat & RT5120_HOTDIE_MASK) | |
122 | cur_flags |= REGULATOR_ERROR_OVER_TEMP; | |
123 | ||
124 | *flags = cur_flags; | |
125 | return 0; | |
126 | } | |
127 | ||
128 | static int rt5120_buck1_set_suspend_voltage(struct regulator_dev *rdev, int uV) | |
129 | { | |
130 | struct regmap *regmap = rdev_get_regmap(rdev); | |
131 | int sel; | |
132 | ||
133 | if (uV < RT5120_BUCK1_MINUV || uV > RT5120_BUCK1_MAXUV) | |
134 | return -EINVAL; | |
135 | ||
136 | sel = (uV - RT5120_BUCK1_MINUV) / RT5120_BUCK1_STEPUV; | |
137 | return regmap_write(regmap, RT5120_REG_CH1SLPVID, sel); | |
138 | } | |
139 | ||
140 | static int rt5120_regulator_set_suspend_enable(struct regulator_dev *rdev) | |
141 | { | |
142 | struct regmap *regmap = rdev_get_regmap(rdev); | |
143 | int rid = rdev_get_id(rdev); | |
144 | unsigned int mask = RT5120_RIDEN_MASK(rid); | |
145 | ||
146 | return regmap_update_bits(regmap, RT5120_REG_SLPCTL, mask, mask); | |
147 | } | |
148 | ||
149 | static int rt5120_regulator_set_suspend_disable(struct regulator_dev *rdev) | |
150 | { | |
151 | struct regmap *regmap = rdev_get_regmap(rdev); | |
152 | int rid = rdev_get_id(rdev); | |
153 | unsigned int mask = RT5120_RIDEN_MASK(rid); | |
154 | ||
155 | return regmap_update_bits(regmap, RT5120_REG_SLPCTL, mask, 0); | |
156 | } | |
157 | ||
158 | static const struct regulator_ops rt5120_buck1_ops = { | |
159 | .enable = regulator_enable_regmap, | |
160 | .disable = regulator_disable_regmap, | |
161 | .is_enabled = regulator_is_enabled_regmap, | |
162 | .list_voltage = regulator_list_voltage_linear, | |
163 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
164 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
165 | .set_active_discharge = regulator_set_active_discharge_regmap, | |
166 | .set_mode = rt5120_buck_set_mode, | |
167 | .get_mode = rt5120_buck_get_mode, | |
168 | .get_error_flags = rt5120_regulator_get_error_flags, | |
169 | .set_suspend_voltage = rt5120_buck1_set_suspend_voltage, | |
170 | .set_suspend_enable = rt5120_regulator_set_suspend_enable, | |
171 | .set_suspend_disable = rt5120_regulator_set_suspend_disable, | |
172 | }; | |
173 | ||
174 | static const struct regulator_ops rt5120_buck234_ops = { | |
175 | .enable = regulator_enable_regmap, | |
176 | .disable = regulator_disable_regmap, | |
177 | .is_enabled = regulator_is_enabled_regmap, | |
178 | .set_active_discharge = regulator_set_active_discharge_regmap, | |
179 | .set_mode = rt5120_buck_set_mode, | |
180 | .get_mode = rt5120_buck_get_mode, | |
181 | .get_error_flags = rt5120_regulator_get_error_flags, | |
182 | .set_suspend_enable = rt5120_regulator_set_suspend_enable, | |
183 | .set_suspend_disable = rt5120_regulator_set_suspend_disable, | |
184 | }; | |
185 | ||
186 | static const struct regulator_ops rt5120_ldo_ops = { | |
187 | .enable = regulator_enable_regmap, | |
188 | .disable = regulator_disable_regmap, | |
189 | .is_enabled = regulator_is_enabled_regmap, | |
190 | .set_active_discharge = regulator_set_active_discharge_regmap, | |
191 | .get_error_flags = rt5120_regulator_get_error_flags, | |
192 | .set_suspend_enable = rt5120_regulator_set_suspend_enable, | |
193 | .set_suspend_disable = rt5120_regulator_set_suspend_disable, | |
194 | }; | |
195 | ||
196 | static const struct regulator_ops rt5120_exten_ops = { | |
197 | .enable = regulator_enable_regmap, | |
198 | .disable = regulator_disable_regmap, | |
199 | .is_enabled = regulator_is_enabled_regmap, | |
200 | .set_suspend_enable = rt5120_regulator_set_suspend_enable, | |
201 | .set_suspend_disable = rt5120_regulator_set_suspend_disable, | |
202 | }; | |
203 | ||
204 | static unsigned int rt5120_buck_of_map_mode(unsigned int mode) | |
205 | { | |
206 | switch (mode) { | |
207 | case RT5120_AUTO_MODE: | |
208 | return REGULATOR_MODE_NORMAL; | |
209 | case RT5120_FPWM_MODE: | |
210 | return REGULATOR_MODE_FAST; | |
211 | default: | |
212 | return REGULATOR_MODE_INVALID; | |
213 | } | |
214 | } | |
215 | ||
216 | static void rt5120_fillin_regulator_desc(struct regulator_desc *desc, int rid) | |
217 | { | |
218 | static const char * const name[] = { | |
219 | "buck1", "buck2", "buck3", "buck4", "ldo", "exten" }; | |
220 | static const char * const sname[] = { | |
221 | "vin1", "vin2", "vin3", "vin4", "vinldo", NULL }; | |
222 | ||
223 | /* Common regulator property */ | |
224 | desc->name = name[rid]; | |
225 | desc->supply_name = sname[rid]; | |
226 | desc->owner = THIS_MODULE; | |
227 | desc->type = REGULATOR_VOLTAGE; | |
228 | desc->id = rid; | |
229 | desc->enable_reg = RT5120_REG_ENABLE; | |
230 | desc->enable_mask = RT5120_RIDEN_MASK(rid); | |
231 | desc->active_discharge_reg = RT5120_REG_DISCHG; | |
232 | desc->active_discharge_mask = RT5120_RADEN_MASK(rid); | |
233 | desc->active_discharge_on = RT5120_RADEN_MASK(rid); | |
234 | /* Config n_voltages to 1 for all*/ | |
235 | desc->n_voltages = 1; | |
236 | ||
237 | /* Only buck support mode change */ | |
238 | if (rid >= RT5120_REGULATOR_BUCK1 && rid <= RT5120_REGULATOR_BUCK4) | |
239 | desc->of_map_mode = rt5120_buck_of_map_mode; | |
240 | ||
241 | /* RID specific property init */ | |
242 | switch (rid) { | |
243 | case RT5120_REGULATOR_BUCK1: | |
244 | /* Only buck1 support voltage change by I2C */ | |
245 | desc->n_voltages = RT5120_BUCK1_NUM_VOLT; | |
246 | desc->min_uV = RT5120_BUCK1_MINUV; | |
247 | desc->uV_step = RT5120_BUCK1_STEPUV; | |
248 | desc->vsel_reg = RT5120_REG_CH1VID, | |
249 | desc->vsel_mask = RT5120_CH1VID_MASK, | |
250 | desc->ops = &rt5120_buck1_ops; | |
251 | break; | |
252 | case RT5120_REGULATOR_BUCK2 ... RT5120_REGULATOR_BUCK4: | |
253 | desc->ops = &rt5120_buck234_ops; | |
254 | break; | |
255 | case RT5120_REGULATOR_LDO: | |
256 | desc->ops = &rt5120_ldo_ops; | |
257 | break; | |
258 | default: | |
259 | desc->ops = &rt5120_exten_ops; | |
260 | } | |
261 | } | |
262 | ||
263 | static int rt5120_of_parse_cb(struct rt5120_priv *priv, int rid, | |
264 | struct of_regulator_match *match) | |
265 | { | |
266 | struct regulator_desc *desc = priv->rdesc + rid; | |
267 | struct regulator_init_data *init_data = match->init_data; | |
268 | ||
269 | if (!init_data || rid == RT5120_REGULATOR_BUCK1) | |
270 | return 0; | |
271 | ||
272 | if (init_data->constraints.min_uV != init_data->constraints.max_uV) { | |
273 | dev_err(priv->dev, "Variable voltage for fixed regulator\n"); | |
274 | return -EINVAL; | |
275 | } | |
276 | ||
277 | desc->fixed_uV = init_data->constraints.min_uV; | |
278 | return 0; | |
279 | } | |
280 | ||
281 | static struct of_regulator_match rt5120_regu_match[RT5120_MAX_REGULATOR] = { | |
282 | [RT5120_REGULATOR_BUCK1] = { .name = "buck1", }, | |
283 | [RT5120_REGULATOR_BUCK2] = { .name = "buck2", }, | |
284 | [RT5120_REGULATOR_BUCK3] = { .name = "buck3", }, | |
285 | [RT5120_REGULATOR_BUCK4] = { .name = "buck4", }, | |
286 | [RT5120_REGULATOR_LDO] = { .name = "ldo", }, | |
287 | [RT5120_REGULATOR_EXTEN] = { .name = "exten", } | |
288 | }; | |
289 | ||
290 | static int rt5120_parse_regulator_dt_data(struct rt5120_priv *priv) | |
291 | { | |
292 | struct device *dev = priv->dev->parent; | |
293 | struct device_node *reg_node; | |
294 | int i, ret; | |
295 | ||
296 | for (i = 0; i < RT5120_MAX_REGULATOR; i++) { | |
297 | rt5120_fillin_regulator_desc(priv->rdesc + i, i); | |
298 | ||
299 | rt5120_regu_match[i].desc = priv->rdesc + i; | |
300 | } | |
301 | ||
302 | reg_node = of_get_child_by_name(dev->of_node, "regulators"); | |
303 | if (!reg_node) { | |
304 | dev_err(priv->dev, "Couldn't find 'regulators' node\n"); | |
305 | return -ENODEV; | |
306 | } | |
307 | ||
308 | ret = of_regulator_match(priv->dev, reg_node, rt5120_regu_match, | |
309 | ARRAY_SIZE(rt5120_regu_match)); | |
310 | ||
311 | of_node_put(reg_node); | |
312 | ||
313 | if (ret < 0) { | |
314 | dev_err(priv->dev, | |
315 | "Error parsing regulator init data (%d)\n", ret); | |
316 | return ret; | |
317 | } | |
318 | ||
319 | for (i = 0; i < RT5120_MAX_REGULATOR; i++) { | |
320 | ret = rt5120_of_parse_cb(priv, i, rt5120_regu_match + i); | |
321 | if (ret) { | |
322 | dev_err(priv->dev, "Failed in [%d] of_passe_cb\n", i); | |
323 | return ret; | |
324 | } | |
325 | } | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
330 | static int rt5120_device_property_init(struct rt5120_priv *priv) | |
331 | { | |
332 | struct device *dev = priv->dev->parent; | |
333 | struct device_node *np = dev->of_node; | |
334 | bool prot_enable; | |
335 | unsigned int prot_enable_val = 0; | |
336 | ||
337 | /* Assign UV/OV HW protection behavior */ | |
338 | prot_enable = of_property_read_bool(np, | |
339 | "richtek,enable-undervolt-hiccup"); | |
340 | if (prot_enable) | |
341 | prot_enable_val |= RT5120_UVHICCUP_MASK; | |
342 | ||
343 | prot_enable = of_property_read_bool(np, | |
344 | "richtek,enable-overvolt-hiccup"); | |
345 | if (prot_enable) | |
346 | prot_enable_val |= RT5120_OVHICCUP_MASK; | |
347 | ||
348 | return regmap_update_bits(priv->regmap, RT5120_REG_UVOVPROT, | |
349 | RT5120_UVHICCUP_MASK | RT5120_OVHICCUP_MASK, | |
350 | prot_enable_val); | |
351 | } | |
352 | ||
353 | static int rt5120_regulator_probe(struct platform_device *pdev) | |
354 | { | |
355 | struct rt5120_priv *priv; | |
356 | struct regulator_dev *rdev; | |
357 | struct regulator_config config = {}; | |
358 | int i, ret; | |
359 | ||
360 | priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); | |
361 | if (!priv) | |
362 | return -ENOMEM; | |
363 | ||
364 | priv->dev = &pdev->dev; | |
365 | ||
366 | priv->regmap = dev_get_regmap(pdev->dev.parent, NULL); | |
367 | if (!priv->regmap) { | |
368 | dev_err(&pdev->dev, "Failed to init regmap\n"); | |
369 | return -ENODEV; | |
370 | } | |
371 | ||
372 | ret = rt5120_device_property_init(priv); | |
373 | if (ret) { | |
374 | dev_err(&pdev->dev, "Failed to do property init\n"); | |
375 | return ret; | |
376 | } | |
377 | ||
378 | ret = rt5120_parse_regulator_dt_data(priv); | |
379 | if (ret) { | |
380 | dev_err(&pdev->dev, "Failed to parse dt data\n"); | |
381 | return ret; | |
382 | } | |
383 | ||
384 | config.dev = &pdev->dev; | |
385 | config.regmap = priv->regmap; | |
386 | ||
387 | for (i = 0; i < RT5120_MAX_REGULATOR; i++) { | |
388 | config.of_node = rt5120_regu_match[i].of_node; | |
389 | config.init_data = rt5120_regu_match[i].init_data; | |
390 | ||
391 | rdev = devm_regulator_register(&pdev->dev, priv->rdesc + i, | |
392 | &config); | |
393 | if (IS_ERR(rdev)) { | |
394 | dev_err(&pdev->dev, | |
395 | "Failed to register regulator [%d]\n", i); | |
396 | return PTR_ERR(rdev); | |
397 | } | |
398 | } | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | static const struct platform_device_id rt5120_regulator_dev_table[] = { | |
404 | { "rt5120-regulator", 0 }, | |
405 | {} | |
406 | }; | |
407 | MODULE_DEVICE_TABLE(platform, rt5120_regulator_dev_table); | |
408 | ||
409 | static struct platform_driver rt5120_regulator_driver = { | |
410 | .driver = { | |
411 | .name = "rt5120-regulator", | |
41cff178 | 412 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
c0216c0e CH |
413 | }, |
414 | .id_table = rt5120_regulator_dev_table, | |
415 | .probe = rt5120_regulator_probe, | |
416 | }; | |
417 | module_platform_driver(rt5120_regulator_driver); | |
418 | ||
419 | MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); | |
420 | MODULE_DESCRIPTION("Richtek RT5120 regulator driver"); | |
421 | MODULE_LICENSE("GPL v2"); |