1 /*
2  * Regulators driver for Marvell 88PM8607
3  *
4  * Copyright (C) 2009 Marvell International Ltd.
5  *	Haojian Zhuang <haojian.zhuang@marvell.com>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/err.h>
14 #include <linux/i2c.h>
15 #include <linux/of.h>
16 #include <linux/regulator/of_regulator.h>
17 #include <linux/platform_device.h>
18 #include <linux/regulator/driver.h>
19 #include <linux/regulator/machine.h>
20 #include <linux/mfd/88pm860x.h>
21 #include <linux/module.h>
22 
23 struct pm8607_regulator_info {
24 	struct regulator_desc	desc;
25 	struct pm860x_chip	*chip;
26 	struct regulator_dev	*regulator;
27 	struct i2c_client	*i2c;
28 	struct i2c_client	*i2c_8606;
29 
30 	unsigned int	*vol_table;
31 	unsigned int	*vol_suspend;
32 
33 	int	slope_double;
34 };
35 
36 static const unsigned int BUCK1_table[] = {
37 	 725000,  750000,  775000,  800000,  825000,  850000,  875000,  900000,
38 	 925000,  950000,  975000, 1000000, 1025000, 1050000, 1075000, 1100000,
39 	1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
40 	1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
41 	      0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
42 	 200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
43 	 400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
44 	 600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
45 };
46 
47 static const unsigned int BUCK1_suspend_table[] = {
48 	      0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
49 	 200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
50 	 400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
51 	 600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
52 	 800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
53 	1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
54 	1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
55 	1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
56 };
57 
58 static const unsigned int BUCK2_table[] = {
59 	      0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
60 	 400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
61 	 800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
62 	1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
63 	1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
64 	2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
65 	2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
66 	2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
67 };
68 
69 static const unsigned int BUCK2_suspend_table[] = {
70 	      0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
71 	 400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
72 	 800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
73 	1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
74 	1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
75 	2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
76 	2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
77 	2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
78 };
79 
80 static const unsigned int BUCK3_table[] = {
81 	      0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
82 	 200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
83 	 400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
84 	 600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
85 	 800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
86 	1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
87 	1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
88 	1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
89 };
90 
91 static const unsigned int BUCK3_suspend_table[] = {
92 	      0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
93 	 200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
94 	 400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
95 	 600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
96 	 800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
97 	1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
98 	1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
99 	1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
100 };
101 
102 static const unsigned int LDO1_table[] = {
103 	1800000, 1200000, 2800000, 0,
104 };
105 
106 static const unsigned int LDO1_suspend_table[] = {
107 	1800000, 1200000, 0, 0,
108 };
109 
110 static const unsigned int LDO2_table[] = {
111 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
112 };
113 
114 static const unsigned int LDO2_suspend_table[] = {
115 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
116 };
117 
118 static const unsigned int LDO3_table[] = {
119 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
120 };
121 
122 static const unsigned int LDO3_suspend_table[] = {
123 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
124 };
125 
126 static const unsigned int LDO4_table[] = {
127 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 3300000,
128 };
129 
130 static const unsigned int LDO4_suspend_table[] = {
131 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 2900000,
132 };
133 
134 static const unsigned int LDO5_table[] = {
135 	2900000, 3000000, 3100000, 3300000,
136 };
137 
138 static const unsigned int LDO5_suspend_table[] = {
139 	2900000, 0, 0, 0,
140 };
141 
142 static const unsigned int LDO6_table[] = {
143 	1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 3300000,
144 };
145 
146 static const unsigned int LDO6_suspend_table[] = {
147 	1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 2900000,
148 };
149 
150 static const unsigned int LDO7_table[] = {
151 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
152 };
153 
154 static const unsigned int LDO7_suspend_table[] = {
155 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
156 };
157 
158 static const unsigned int LDO8_table[] = {
159 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
160 };
161 
162 static const unsigned int LDO8_suspend_table[] = {
163 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
164 };
165 
166 static const unsigned int LDO9_table[] = {
167 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
168 };
169 
170 static const unsigned int LDO9_suspend_table[] = {
171 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
172 };
173 
174 static const unsigned int LDO10_table[] = {
175 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
176 	1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
177 };
178 
179 static const unsigned int LDO10_suspend_table[] = {
180 	1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
181 	1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
182 };
183 
184 static const unsigned int LDO12_table[] = {
185 	1800000, 1900000, 2700000, 2800000, 2900000, 3000000, 3100000, 3300000,
186 	1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
187 };
188 
189 static const unsigned int LDO12_suspend_table[] = {
190 	1800000, 1900000, 2700000, 2800000, 2900000, 2900000, 2900000, 2900000,
191 	1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
192 };
193 
194 static const unsigned int LDO13_table[] = {
195 	1200000, 1300000, 1800000, 2000000, 2500000, 2800000, 3000000, 0,
196 };
197 
198 static const unsigned int LDO13_suspend_table[] = {
199 	0,
200 };
201 
202 static const unsigned int LDO14_table[] = {
203 	1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 3300000,
204 };
205 
206 static const unsigned int LDO14_suspend_table[] = {
207 	1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 2900000,
208 };
209 
pm8607_list_voltage(struct regulator_dev * rdev,unsigned index)210 static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
211 {
212 	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
213 	int ret = -EINVAL;
214 
215 	if (info->vol_table && (index < rdev->desc->n_voltages)) {
216 		ret = info->vol_table[index];
217 		if (info->slope_double)
218 			ret <<= 1;
219 	}
220 	return ret;
221 }
222 
223 static const struct regulator_ops pm8607_regulator_ops = {
224 	.list_voltage	= pm8607_list_voltage,
225 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
226 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
227 	.enable = regulator_enable_regmap,
228 	.disable = regulator_disable_regmap,
229 	.is_enabled = regulator_is_enabled_regmap,
230 };
231 
232 static const struct regulator_ops pm8606_preg_ops = {
233 	.enable		= regulator_enable_regmap,
234 	.disable	= regulator_disable_regmap,
235 	.is_enabled	= regulator_is_enabled_regmap,
236 };
237 
238 #define PM8606_PREG(ereg, ebit)						\
239 {									\
240 	.desc	= {							\
241 		.name	= "PREG",					\
242 		.ops	= &pm8606_preg_ops,				\
243 		.type	= REGULATOR_CURRENT,				\
244 		.id	= PM8606_ID_PREG,				\
245 		.owner	= THIS_MODULE,					\
246 		.enable_reg = PM8606_##ereg,				\
247 		.enable_mask = (ebit),					\
248 		.enable_is_inverted = true,				\
249 	},								\
250 }
251 
252 #define PM8607_DVC(vreg, ureg, ubit, ereg, ebit)			\
253 {									\
254 	.desc	= {							\
255 		.name	= #vreg,					\
256 		.ops	= &pm8607_regulator_ops,			\
257 		.type	= REGULATOR_VOLTAGE,				\
258 		.id	= PM8607_ID_##vreg,				\
259 		.owner	= THIS_MODULE,					\
260 		.n_voltages = ARRAY_SIZE(vreg##_table),			\
261 		.vsel_reg = PM8607_##vreg,				\
262 		.vsel_mask = ARRAY_SIZE(vreg##_table) - 1,		\
263 		.apply_reg = PM8607_##ureg,				\
264 		.apply_bit = (ubit),					\
265 		.enable_reg = PM8607_##ereg,				\
266 		.enable_mask = 1 << (ebit),				\
267 	},								\
268 	.slope_double	= (0),						\
269 	.vol_table	= (unsigned int *)&vreg##_table,		\
270 	.vol_suspend	= (unsigned int *)&vreg##_suspend_table,	\
271 }
272 
273 #define PM8607_LDO(_id, vreg, shift, ereg, ebit)			\
274 {									\
275 	.desc	= {							\
276 		.name	= "LDO" #_id,					\
277 		.ops	= &pm8607_regulator_ops,			\
278 		.type	= REGULATOR_VOLTAGE,				\
279 		.id	= PM8607_ID_LDO##_id,				\
280 		.owner	= THIS_MODULE,					\
281 		.n_voltages = ARRAY_SIZE(LDO##_id##_table),		\
282 		.vsel_reg = PM8607_##vreg,				\
283 		.vsel_mask = (ARRAY_SIZE(LDO##_id##_table) - 1) << (shift), \
284 		.enable_reg = PM8607_##ereg,				\
285 		.enable_mask = 1 << (ebit),				\
286 	},								\
287 	.slope_double	= (0),						\
288 	.vol_table	= (unsigned int *)&LDO##_id##_table,		\
289 	.vol_suspend	= (unsigned int *)&LDO##_id##_suspend_table,	\
290 }
291 
292 static struct pm8607_regulator_info pm8607_regulator_info[] = {
293 	PM8607_DVC(BUCK1, GO, BIT(0), SUPPLIES_EN11, 0),
294 	PM8607_DVC(BUCK2, GO, BIT(1), SUPPLIES_EN11, 1),
295 	PM8607_DVC(BUCK3, GO, BIT(2), SUPPLIES_EN11, 2),
296 
297 	PM8607_LDO(1,         LDO1, 0, SUPPLIES_EN11, 3),
298 	PM8607_LDO(2,         LDO2, 0, SUPPLIES_EN11, 4),
299 	PM8607_LDO(3,         LDO3, 0, SUPPLIES_EN11, 5),
300 	PM8607_LDO(4,         LDO4, 0, SUPPLIES_EN11, 6),
301 	PM8607_LDO(5,         LDO5, 0, SUPPLIES_EN11, 7),
302 	PM8607_LDO(6,         LDO6, 0, SUPPLIES_EN12, 0),
303 	PM8607_LDO(7,         LDO7, 0, SUPPLIES_EN12, 1),
304 	PM8607_LDO(8,         LDO8, 0, SUPPLIES_EN12, 2),
305 	PM8607_LDO(9,         LDO9, 0, SUPPLIES_EN12, 3),
306 	PM8607_LDO(10,        LDO10, 0, SUPPLIES_EN12, 4),
307 	PM8607_LDO(12,        LDO12, 0, SUPPLIES_EN12, 5),
308 	PM8607_LDO(13, VIBRATOR_SET, 1, VIBRATOR_SET, 0),
309 	PM8607_LDO(14,        LDO14, 0, SUPPLIES_EN12, 6),
310 };
311 
312 static struct pm8607_regulator_info pm8606_regulator_info[] = {
313 	PM8606_PREG(PREREGULATORB, 5),
314 };
315 
316 #ifdef CONFIG_OF
pm8607_regulator_dt_init(struct platform_device * pdev,struct pm8607_regulator_info * info,struct regulator_config * config)317 static int pm8607_regulator_dt_init(struct platform_device *pdev,
318 				    struct pm8607_regulator_info *info,
319 				    struct regulator_config *config)
320 {
321 	struct device_node *nproot, *np;
322 	nproot = pdev->dev.parent->of_node;
323 	if (!nproot)
324 		return -ENODEV;
325 	nproot = of_get_child_by_name(nproot, "regulators");
326 	if (!nproot) {
327 		dev_err(&pdev->dev, "failed to find regulators node\n");
328 		return -ENODEV;
329 	}
330 	for_each_child_of_node(nproot, np) {
331 		if (!of_node_cmp(np->name, info->desc.name)) {
332 			config->init_data =
333 				of_get_regulator_init_data(&pdev->dev, np,
334 							   &info->desc);
335 			config->of_node = np;
336 			break;
337 		}
338 	}
339 	of_node_put(nproot);
340 	return 0;
341 }
342 #else
343 #define pm8607_regulator_dt_init(x, y, z)	(-1)
344 #endif
345 
pm8607_regulator_probe(struct platform_device * pdev)346 static int pm8607_regulator_probe(struct platform_device *pdev)
347 {
348 	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
349 	struct pm8607_regulator_info *info = NULL;
350 	struct regulator_init_data *pdata = dev_get_platdata(&pdev->dev);
351 	struct regulator_config config = { };
352 	struct resource *res;
353 	int i;
354 
355 	res = platform_get_resource(pdev, IORESOURCE_REG, 0);
356 	if (res) {
357 		/* There're resources in 88PM8607 regulator driver */
358 		for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
359 			info = &pm8607_regulator_info[i];
360 			if (info->desc.vsel_reg == res->start)
361 				break;
362 		}
363 		if (i == ARRAY_SIZE(pm8607_regulator_info)) {
364 			dev_err(&pdev->dev, "Failed to find regulator %llu\n",
365 				(unsigned long long)res->start);
366 			return -EINVAL;
367 		}
368 	} else {
369 		/* There's no resource in 88PM8606 PREG regulator driver */
370 		info = &pm8606_regulator_info[0];
371 		/* i is used to check regulator ID */
372 		i = -1;
373 	}
374 	info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
375 	info->i2c_8606 = (chip->id == CHIP_PM8607) ? chip->companion :
376 			chip->client;
377 	info->chip = chip;
378 
379 	/* check DVC ramp slope double */
380 	if ((i == PM8607_ID_BUCK3) && info->chip->buck3_double)
381 		info->slope_double = 1;
382 
383 	config.dev = &pdev->dev;
384 	config.driver_data = info;
385 
386 	if (pm8607_regulator_dt_init(pdev, info, &config))
387 		if (pdata)
388 			config.init_data = pdata;
389 
390 	if (chip->id == CHIP_PM8607)
391 		config.regmap = chip->regmap;
392 	else
393 		config.regmap = chip->regmap_companion;
394 
395 	info->regulator = devm_regulator_register(&pdev->dev, &info->desc,
396 						  &config);
397 	if (IS_ERR(info->regulator)) {
398 		dev_err(&pdev->dev, "failed to register regulator %s\n",
399 			info->desc.name);
400 		return PTR_ERR(info->regulator);
401 	}
402 
403 	platform_set_drvdata(pdev, info);
404 	return 0;
405 }
406 
407 static const struct platform_device_id pm8607_regulator_driver_ids[] = {
408 	{
409 		.name	= "88pm860x-regulator",
410 		.driver_data	= 0,
411 	}, {
412 		.name	= "88pm860x-preg",
413 		.driver_data	= 0,
414 	},
415 	{ },
416 };
417 MODULE_DEVICE_TABLE(platform, pm8607_regulator_driver_ids);
418 
419 static struct platform_driver pm8607_regulator_driver = {
420 	.driver		= {
421 		.name	= "88pm860x-regulator",
422 	},
423 	.probe		= pm8607_regulator_probe,
424 	.id_table	= pm8607_regulator_driver_ids,
425 };
426 
pm8607_regulator_init(void)427 static int __init pm8607_regulator_init(void)
428 {
429 	return platform_driver_register(&pm8607_regulator_driver);
430 }
431 subsys_initcall(pm8607_regulator_init);
432 
pm8607_regulator_exit(void)433 static void __exit pm8607_regulator_exit(void)
434 {
435 	platform_driver_unregister(&pm8607_regulator_driver);
436 }
437 module_exit(pm8607_regulator_exit);
438 
439 MODULE_LICENSE("GPL");
440 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
441 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
442 MODULE_ALIAS("platform:88pm8607-regulator");
443