1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // pv88060-regulator.c - Regulator device driver for PV88060 |
4 | // Copyright (C) 2015 Powerventure Semiconductor Ltd. |
5 | |
6 | #include <linux/err.h> |
7 | #include <linux/i2c.h> |
8 | #include <linux/module.h> |
9 | #include <linux/init.h> |
10 | #include <linux/slab.h> |
11 | #include <linux/regulator/driver.h> |
12 | #include <linux/regulator/machine.h> |
13 | #include <linux/regmap.h> |
14 | #include <linux/irq.h> |
15 | #include <linux/interrupt.h> |
16 | #include <linux/regulator/of_regulator.h> |
17 | #include "pv88060-regulator.h" |
18 | |
19 | #define PV88060_MAX_REGULATORS 14 |
20 | |
21 | /* PV88060 REGULATOR IDs */ |
22 | enum { |
23 | /* BUCKs */ |
24 | PV88060_ID_BUCK1, |
25 | |
26 | /* LDOs */ |
27 | PV88060_ID_LDO1, |
28 | PV88060_ID_LDO2, |
29 | PV88060_ID_LDO3, |
30 | PV88060_ID_LDO4, |
31 | PV88060_ID_LDO5, |
32 | PV88060_ID_LDO6, |
33 | PV88060_ID_LDO7, |
34 | |
35 | /* SWTs */ |
36 | PV88060_ID_SW1, |
37 | PV88060_ID_SW2, |
38 | PV88060_ID_SW3, |
39 | PV88060_ID_SW4, |
40 | PV88060_ID_SW5, |
41 | PV88060_ID_SW6, |
42 | }; |
43 | |
44 | struct pv88060_regulator { |
45 | struct regulator_desc desc; |
46 | unsigned int conf; /* buck configuration register */ |
47 | }; |
48 | |
49 | struct pv88060 { |
50 | struct device *dev; |
51 | struct regmap *regmap; |
52 | struct regulator_dev *rdev[PV88060_MAX_REGULATORS]; |
53 | }; |
54 | |
55 | static const struct regmap_config pv88060_regmap_config = { |
56 | .reg_bits = 8, |
57 | .val_bits = 8, |
58 | }; |
59 | |
60 | /* Current limits array (in uA) for BUCK1 |
61 | * Entry indexes corresponds to register values. |
62 | */ |
63 | |
64 | static const unsigned int pv88060_buck1_limits[] = { |
65 | 1496000, 2393000, 3291000, 4189000 |
66 | }; |
67 | |
68 | static unsigned int pv88060_buck_get_mode(struct regulator_dev *rdev) |
69 | { |
70 | struct pv88060_regulator *info = rdev_get_drvdata(rdev); |
71 | unsigned int data; |
72 | int ret, mode = 0; |
73 | |
74 | ret = regmap_read(map: rdev->regmap, reg: info->conf, val: &data); |
75 | if (ret < 0) |
76 | return ret; |
77 | |
78 | switch (data & PV88060_BUCK_MODE_MASK) { |
79 | case PV88060_BUCK_MODE_SYNC: |
80 | mode = REGULATOR_MODE_FAST; |
81 | break; |
82 | case PV88060_BUCK_MODE_AUTO: |
83 | mode = REGULATOR_MODE_NORMAL; |
84 | break; |
85 | case PV88060_BUCK_MODE_SLEEP: |
86 | mode = REGULATOR_MODE_STANDBY; |
87 | break; |
88 | } |
89 | |
90 | return mode; |
91 | } |
92 | |
93 | static int pv88060_buck_set_mode(struct regulator_dev *rdev, |
94 | unsigned int mode) |
95 | { |
96 | struct pv88060_regulator *info = rdev_get_drvdata(rdev); |
97 | int val = 0; |
98 | |
99 | switch (mode) { |
100 | case REGULATOR_MODE_FAST: |
101 | val = PV88060_BUCK_MODE_SYNC; |
102 | break; |
103 | case REGULATOR_MODE_NORMAL: |
104 | val = PV88060_BUCK_MODE_AUTO; |
105 | break; |
106 | case REGULATOR_MODE_STANDBY: |
107 | val = PV88060_BUCK_MODE_SLEEP; |
108 | break; |
109 | default: |
110 | return -EINVAL; |
111 | } |
112 | |
113 | return regmap_update_bits(map: rdev->regmap, reg: info->conf, |
114 | PV88060_BUCK_MODE_MASK, val); |
115 | } |
116 | |
117 | static const struct regulator_ops pv88060_buck_ops = { |
118 | .get_mode = pv88060_buck_get_mode, |
119 | .set_mode = pv88060_buck_set_mode, |
120 | .enable = regulator_enable_regmap, |
121 | .disable = regulator_disable_regmap, |
122 | .is_enabled = regulator_is_enabled_regmap, |
123 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
124 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
125 | .list_voltage = regulator_list_voltage_linear, |
126 | .set_current_limit = regulator_set_current_limit_regmap, |
127 | .get_current_limit = regulator_get_current_limit_regmap, |
128 | }; |
129 | |
130 | static const struct regulator_ops pv88060_ldo_ops = { |
131 | .enable = regulator_enable_regmap, |
132 | .disable = regulator_disable_regmap, |
133 | .is_enabled = regulator_is_enabled_regmap, |
134 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
135 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
136 | .list_voltage = regulator_list_voltage_linear, |
137 | }; |
138 | |
139 | static const struct regulator_ops pv88060_sw_ops = { |
140 | .enable = regulator_enable_regmap, |
141 | .disable = regulator_disable_regmap, |
142 | .is_enabled = regulator_is_enabled_regmap, |
143 | }; |
144 | |
145 | #define PV88060_BUCK(chip, regl_name, min, step, max, limits_array) \ |
146 | {\ |
147 | .desc = {\ |
148 | .id = chip##_ID_##regl_name,\ |
149 | .name = __stringify(chip##_##regl_name),\ |
150 | .of_match = of_match_ptr(#regl_name),\ |
151 | .regulators_node = of_match_ptr("regulators"),\ |
152 | .type = REGULATOR_VOLTAGE,\ |
153 | .owner = THIS_MODULE,\ |
154 | .ops = &pv88060_buck_ops,\ |
155 | .min_uV = min,\ |
156 | .uV_step = step,\ |
157 | .n_voltages = ((max) - (min))/(step) + 1,\ |
158 | .enable_reg = PV88060_REG_##regl_name##_CONF0,\ |
159 | .enable_mask = PV88060_BUCK_EN, \ |
160 | .vsel_reg = PV88060_REG_##regl_name##_CONF0,\ |
161 | .vsel_mask = PV88060_VBUCK_MASK,\ |
162 | .curr_table = limits_array,\ |
163 | .n_current_limits = ARRAY_SIZE(limits_array),\ |
164 | .csel_reg = PV88060_REG_##regl_name##_CONF1,\ |
165 | .csel_mask = PV88060_BUCK_ILIM_MASK,\ |
166 | },\ |
167 | .conf = PV88060_REG_##regl_name##_CONF1,\ |
168 | } |
169 | |
170 | #define PV88060_LDO(chip, regl_name, min, step, max) \ |
171 | {\ |
172 | .desc = {\ |
173 | .id = chip##_ID_##regl_name,\ |
174 | .name = __stringify(chip##_##regl_name),\ |
175 | .of_match = of_match_ptr(#regl_name),\ |
176 | .regulators_node = of_match_ptr("regulators"),\ |
177 | .type = REGULATOR_VOLTAGE,\ |
178 | .owner = THIS_MODULE,\ |
179 | .ops = &pv88060_ldo_ops,\ |
180 | .min_uV = min, \ |
181 | .uV_step = step, \ |
182 | .n_voltages = (step) ? ((max - min) / step + 1) : 1, \ |
183 | .enable_reg = PV88060_REG_##regl_name##_CONF, \ |
184 | .enable_mask = PV88060_LDO_EN, \ |
185 | .vsel_reg = PV88060_REG_##regl_name##_CONF, \ |
186 | .vsel_mask = PV88060_VLDO_MASK, \ |
187 | },\ |
188 | } |
189 | |
190 | #define PV88060_SW(chip, regl_name, max) \ |
191 | {\ |
192 | .desc = {\ |
193 | .id = chip##_ID_##regl_name,\ |
194 | .name = __stringify(chip##_##regl_name),\ |
195 | .of_match = of_match_ptr(#regl_name),\ |
196 | .regulators_node = of_match_ptr("regulators"),\ |
197 | .type = REGULATOR_VOLTAGE,\ |
198 | .owner = THIS_MODULE,\ |
199 | .ops = &pv88060_sw_ops,\ |
200 | .fixed_uV = max,\ |
201 | .n_voltages = 1,\ |
202 | .enable_reg = PV88060_REG_##regl_name##_CONF,\ |
203 | .enable_mask = PV88060_SW_EN,\ |
204 | },\ |
205 | } |
206 | |
207 | static const struct pv88060_regulator pv88060_regulator_info[] = { |
208 | PV88060_BUCK(PV88060, BUCK1, 2800000, 12500, 4387500, |
209 | pv88060_buck1_limits), |
210 | PV88060_LDO(PV88060, LDO1, 1200000, 50000, 3350000), |
211 | PV88060_LDO(PV88060, LDO2, 1200000, 50000, 3350000), |
212 | PV88060_LDO(PV88060, LDO3, 1200000, 50000, 3350000), |
213 | PV88060_LDO(PV88060, LDO4, 1200000, 50000, 3350000), |
214 | PV88060_LDO(PV88060, LDO5, 1200000, 50000, 3350000), |
215 | PV88060_LDO(PV88060, LDO6, 1200000, 50000, 3350000), |
216 | PV88060_LDO(PV88060, LDO7, 1200000, 50000, 3350000), |
217 | PV88060_SW(PV88060, SW1, 5000000), |
218 | PV88060_SW(PV88060, SW2, 5000000), |
219 | PV88060_SW(PV88060, SW3, 5000000), |
220 | PV88060_SW(PV88060, SW4, 5000000), |
221 | PV88060_SW(PV88060, SW5, 5000000), |
222 | PV88060_SW(PV88060, SW6, 5000000), |
223 | }; |
224 | |
225 | static irqreturn_t pv88060_irq_handler(int irq, void *data) |
226 | { |
227 | struct pv88060 *chip = data; |
228 | int i, reg_val, err, ret = IRQ_NONE; |
229 | |
230 | err = regmap_read(map: chip->regmap, PV88060_REG_EVENT_A, val: ®_val); |
231 | if (err < 0) |
232 | goto error_i2c; |
233 | |
234 | if (reg_val & PV88060_E_VDD_FLT) { |
235 | for (i = 0; i < PV88060_MAX_REGULATORS; i++) { |
236 | if (chip->rdev[i] != NULL) |
237 | regulator_notifier_call_chain(rdev: chip->rdev[i], |
238 | REGULATOR_EVENT_UNDER_VOLTAGE, |
239 | NULL); |
240 | } |
241 | |
242 | err = regmap_write(map: chip->regmap, PV88060_REG_EVENT_A, |
243 | PV88060_E_VDD_FLT); |
244 | if (err < 0) |
245 | goto error_i2c; |
246 | |
247 | ret = IRQ_HANDLED; |
248 | } |
249 | |
250 | if (reg_val & PV88060_E_OVER_TEMP) { |
251 | for (i = 0; i < PV88060_MAX_REGULATORS; i++) { |
252 | if (chip->rdev[i] != NULL) |
253 | regulator_notifier_call_chain(rdev: chip->rdev[i], |
254 | REGULATOR_EVENT_OVER_TEMP, |
255 | NULL); |
256 | } |
257 | |
258 | err = regmap_write(map: chip->regmap, PV88060_REG_EVENT_A, |
259 | PV88060_E_OVER_TEMP); |
260 | if (err < 0) |
261 | goto error_i2c; |
262 | |
263 | ret = IRQ_HANDLED; |
264 | } |
265 | |
266 | return ret; |
267 | |
268 | error_i2c: |
269 | dev_err(chip->dev, "I2C error : %d\n" , err); |
270 | return IRQ_NONE; |
271 | } |
272 | |
273 | /* |
274 | * I2C driver interface functions |
275 | */ |
276 | static int pv88060_i2c_probe(struct i2c_client *i2c) |
277 | { |
278 | struct regulator_init_data *init_data = dev_get_platdata(dev: &i2c->dev); |
279 | struct pv88060 *chip; |
280 | struct regulator_config config = { }; |
281 | int error, i, ret = 0; |
282 | |
283 | chip = devm_kzalloc(dev: &i2c->dev, size: sizeof(struct pv88060), GFP_KERNEL); |
284 | if (!chip) |
285 | return -ENOMEM; |
286 | |
287 | chip->dev = &i2c->dev; |
288 | chip->regmap = devm_regmap_init_i2c(i2c, &pv88060_regmap_config); |
289 | if (IS_ERR(ptr: chip->regmap)) { |
290 | error = PTR_ERR(ptr: chip->regmap); |
291 | dev_err(chip->dev, "Failed to allocate register map: %d\n" , |
292 | error); |
293 | return error; |
294 | } |
295 | |
296 | i2c_set_clientdata(client: i2c, data: chip); |
297 | |
298 | if (i2c->irq != 0) { |
299 | ret = regmap_write(map: chip->regmap, PV88060_REG_MASK_A, val: 0xFF); |
300 | if (ret < 0) { |
301 | dev_err(chip->dev, |
302 | "Failed to mask A reg: %d\n" , ret); |
303 | return ret; |
304 | } |
305 | |
306 | ret = regmap_write(map: chip->regmap, PV88060_REG_MASK_B, val: 0xFF); |
307 | if (ret < 0) { |
308 | dev_err(chip->dev, |
309 | "Failed to mask B reg: %d\n" , ret); |
310 | return ret; |
311 | } |
312 | |
313 | ret = regmap_write(map: chip->regmap, PV88060_REG_MASK_C, val: 0xFF); |
314 | if (ret < 0) { |
315 | dev_err(chip->dev, |
316 | "Failed to mask C reg: %d\n" , ret); |
317 | return ret; |
318 | } |
319 | |
320 | ret = devm_request_threaded_irq(dev: &i2c->dev, irq: i2c->irq, NULL, |
321 | thread_fn: pv88060_irq_handler, |
322 | IRQF_TRIGGER_LOW|IRQF_ONESHOT, |
323 | devname: "pv88060" , dev_id: chip); |
324 | if (ret != 0) { |
325 | dev_err(chip->dev, "Failed to request IRQ: %d\n" , |
326 | i2c->irq); |
327 | return ret; |
328 | } |
329 | |
330 | ret = regmap_update_bits(map: chip->regmap, PV88060_REG_MASK_A, |
331 | PV88060_M_VDD_FLT | PV88060_M_OVER_TEMP, val: 0); |
332 | if (ret < 0) { |
333 | dev_err(chip->dev, |
334 | "Failed to update mask reg: %d\n" , ret); |
335 | return ret; |
336 | } |
337 | |
338 | } else { |
339 | dev_warn(chip->dev, "No IRQ configured\n" ); |
340 | } |
341 | |
342 | config.dev = chip->dev; |
343 | config.regmap = chip->regmap; |
344 | |
345 | for (i = 0; i < PV88060_MAX_REGULATORS; i++) { |
346 | if (init_data) |
347 | config.init_data = &init_data[i]; |
348 | |
349 | config.driver_data = (void *)&pv88060_regulator_info[i]; |
350 | chip->rdev[i] = devm_regulator_register(dev: chip->dev, |
351 | regulator_desc: &pv88060_regulator_info[i].desc, config: &config); |
352 | if (IS_ERR(ptr: chip->rdev[i])) { |
353 | dev_err(chip->dev, |
354 | "Failed to register PV88060 regulator\n" ); |
355 | return PTR_ERR(ptr: chip->rdev[i]); |
356 | } |
357 | } |
358 | |
359 | return 0; |
360 | } |
361 | |
362 | static const struct i2c_device_id pv88060_i2c_id[] = { |
363 | {"pv88060" , 0}, |
364 | {}, |
365 | }; |
366 | MODULE_DEVICE_TABLE(i2c, pv88060_i2c_id); |
367 | |
368 | #ifdef CONFIG_OF |
369 | static const struct of_device_id pv88060_dt_ids[] = { |
370 | { .compatible = "pvs,pv88060" , .data = &pv88060_i2c_id[0] }, |
371 | {}, |
372 | }; |
373 | MODULE_DEVICE_TABLE(of, pv88060_dt_ids); |
374 | #endif |
375 | |
376 | static struct i2c_driver pv88060_regulator_driver = { |
377 | .driver = { |
378 | .name = "pv88060" , |
379 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
380 | .of_match_table = of_match_ptr(pv88060_dt_ids), |
381 | }, |
382 | .probe = pv88060_i2c_probe, |
383 | .id_table = pv88060_i2c_id, |
384 | }; |
385 | |
386 | module_i2c_driver(pv88060_regulator_driver); |
387 | |
388 | MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>" ); |
389 | MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88060" ); |
390 | MODULE_LICENSE("GPL" ); |
391 | |