1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Regulators driver for Marvell 88PM800
4  *
5  * Copyright (C) 2012 Marvell International Ltd.
6  * Joseph(Yossi) Hanin <yhanin@marvell.com>
7  * Yi Zhang <yizhang@marvell.com>
8  */
9 #include <linux/module.h>
10 #include <linux/moduleparam.h>
11 #include <linux/init.h>
12 #include <linux/err.h>
13 #include <linux/regmap.h>
14 #include <linux/regulator/driver.h>
15 #include <linux/regulator/machine.h>
16 #include <linux/mfd/88pm80x.h>
17 #include <linux/delay.h>
18 #include <linux/io.h>
19 #include <linux/of.h>
20 #include <linux/regulator/of_regulator.h>
21 
22 /* LDO1 with DVC[0..3] */
23 #define PM800_LDO1_VOUT		(0x08) /* VOUT1 */
24 #define PM800_LDO1_VOUT_2	(0x09)
25 #define PM800_LDO1_VOUT_3	(0x0A)
26 #define PM800_LDO2_VOUT		(0x0B)
27 #define PM800_LDO3_VOUT		(0x0C)
28 #define PM800_LDO4_VOUT		(0x0D)
29 #define PM800_LDO5_VOUT		(0x0E)
30 #define PM800_LDO6_VOUT		(0x0F)
31 #define PM800_LDO7_VOUT		(0x10)
32 #define PM800_LDO8_VOUT		(0x11)
33 #define PM800_LDO9_VOUT		(0x12)
34 #define PM800_LDO10_VOUT	(0x13)
35 #define PM800_LDO11_VOUT	(0x14)
36 #define PM800_LDO12_VOUT	(0x15)
37 #define PM800_LDO13_VOUT	(0x16)
38 #define PM800_LDO14_VOUT	(0x17)
39 #define PM800_LDO15_VOUT	(0x18)
40 #define PM800_LDO16_VOUT	(0x19)
41 #define PM800_LDO17_VOUT	(0x1A)
42 #define PM800_LDO18_VOUT	(0x1B)
43 #define PM800_LDO19_VOUT	(0x1C)
44 
45 /* BUCK1 with DVC[0..3] */
46 #define PM800_BUCK1		(0x3C)
47 #define PM800_BUCK1_1		(0x3D)
48 #define PM800_BUCK1_2		(0x3E)
49 #define PM800_BUCK1_3		(0x3F)
50 #define PM800_BUCK2		(0x40)
51 #define PM800_BUCK3		(0x41)
52 #define PM800_BUCK4		(0x42)
53 #define PM800_BUCK4_1		(0x43)
54 #define PM800_BUCK4_2		(0x44)
55 #define PM800_BUCK4_3		(0x45)
56 #define PM800_BUCK5		(0x46)
57 
58 #define PM800_BUCK_ENA		(0x50)
59 #define PM800_LDO_ENA1_1	(0x51)
60 #define PM800_LDO_ENA1_2	(0x52)
61 #define PM800_LDO_ENA1_3	(0x53)
62 
63 #define PM800_LDO_ENA2_1	(0x56)
64 #define PM800_LDO_ENA2_2	(0x57)
65 #define PM800_LDO_ENA2_3	(0x58)
66 
67 #define PM800_BUCK1_MISC1	(0x78)
68 #define PM800_BUCK3_MISC1	(0x7E)
69 #define PM800_BUCK4_MISC1	(0x81)
70 #define PM800_BUCK5_MISC1	(0x84)
71 
72 struct pm800_regulator_info {
73 	struct regulator_desc desc;
74 	int max_ua;
75 };
76 
77 /*
78  * vreg - the buck regs string.
79  * ereg - the string for the enable register.
80  * ebit - the bit number in the enable register.
81  * amax - the current
82  * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
83  * not the constant voltage table.
84  * n_volt - Number of available selectors
85  */
86 #define PM800_BUCK(match, vreg, ereg, ebit, amax, volt_ranges, n_volt)	\
87 {									\
88 	.desc	= {							\
89 		.name			= #vreg,			\
90 		.of_match		= of_match_ptr(#match),		\
91 		.regulators_node	= of_match_ptr("regulators"),	\
92 		.ops			= &pm800_volt_range_ops,	\
93 		.type			= REGULATOR_VOLTAGE,		\
94 		.id			= PM800_ID_##vreg,		\
95 		.owner			= THIS_MODULE,			\
96 		.n_voltages		= n_volt,			\
97 		.linear_ranges		= volt_ranges,			\
98 		.n_linear_ranges	= ARRAY_SIZE(volt_ranges),	\
99 		.vsel_reg		= PM800_##vreg,			\
100 		.vsel_mask		= 0x7f,				\
101 		.enable_reg		= PM800_##ereg,			\
102 		.enable_mask		= 1 << (ebit),			\
103 	},								\
104 	.max_ua	= (amax),						\
105 }
106 
107 /*
108  * vreg - the LDO regs string
109  * ereg -  the string for the enable register.
110  * ebit - the bit number in the enable register.
111  * amax - the current
112  * volt_table - the LDO voltage table
113  * For all the LDOes, there are too many ranges. Using volt_table will be
114  * simpler and faster.
115  */
116 #define PM800_LDO(match, vreg, ereg, ebit, amax, ldo_volt_table)	\
117 {									\
118 	.desc	= {							\
119 		.name			= #vreg,			\
120 		.of_match		= of_match_ptr(#match),		\
121 		.regulators_node	= of_match_ptr("regulators"),	\
122 		.ops			= &pm800_volt_table_ops,	\
123 		.type			= REGULATOR_VOLTAGE,		\
124 		.id			= PM800_ID_##vreg,		\
125 		.owner			= THIS_MODULE,			\
126 		.n_voltages		= ARRAY_SIZE(ldo_volt_table),	\
127 		.vsel_reg		= PM800_##vreg##_VOUT,		\
128 		.vsel_mask		= 0xf,				\
129 		.enable_reg		= PM800_##ereg,			\
130 		.enable_mask		= 1 << (ebit),			\
131 		.volt_table		= ldo_volt_table,		\
132 	},								\
133 	.max_ua	= (amax),						\
134 }
135 
136 /* Ranges are sorted in ascending order. */
137 static const struct linear_range buck1_volt_range[] = {
138 	REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
139 	REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x54, 50000),
140 };
141 
142 /* BUCK 2~5 have same ranges. */
143 static const struct linear_range buck2_5_volt_range[] = {
144 	REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
145 	REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x72, 50000),
146 };
147 
148 static const unsigned int ldo1_volt_table[] = {
149 	600000,  650000,  700000,  750000,  800000,  850000,  900000,  950000,
150 	1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
151 };
152 
153 static const unsigned int ldo2_volt_table[] = {
154 	1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
155 };
156 
157 /* LDO 3~17 have same voltage table. */
158 static const unsigned int ldo3_17_volt_table[] = {
159 	1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
160 	2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
161 };
162 
163 /* LDO 18~19 have same voltage table. */
164 static const unsigned int ldo18_19_volt_table[] = {
165 	1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
166 };
167 
pm800_get_current_limit(struct regulator_dev * rdev)168 static int pm800_get_current_limit(struct regulator_dev *rdev)
169 {
170 	struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
171 
172 	return info->max_ua;
173 }
174 
175 static const struct regulator_ops pm800_volt_range_ops = {
176 	.list_voltage		= regulator_list_voltage_linear_range,
177 	.map_voltage		= regulator_map_voltage_linear_range,
178 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
179 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
180 	.enable			= regulator_enable_regmap,
181 	.disable		= regulator_disable_regmap,
182 	.is_enabled		= regulator_is_enabled_regmap,
183 	.get_current_limit	= pm800_get_current_limit,
184 };
185 
186 static const struct regulator_ops pm800_volt_table_ops = {
187 	.list_voltage		= regulator_list_voltage_table,
188 	.map_voltage		= regulator_map_voltage_iterate,
189 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
190 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
191 	.enable			= regulator_enable_regmap,
192 	.disable		= regulator_disable_regmap,
193 	.is_enabled		= regulator_is_enabled_regmap,
194 	.get_current_limit	= pm800_get_current_limit,
195 };
196 
197 /* The array is indexed by id(PM800_ID_XXX) */
198 static struct pm800_regulator_info pm800_regulator_info[] = {
199 	PM800_BUCK(buck1, BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
200 	PM800_BUCK(buck2, BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
201 	PM800_BUCK(buck3, BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
202 	PM800_BUCK(buck4, BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
203 	PM800_BUCK(buck5, BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),
204 
205 	PM800_LDO(ldo1, LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
206 	PM800_LDO(ldo2, LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
207 	PM800_LDO(ldo3, LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
208 	PM800_LDO(ldo4, LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
209 	PM800_LDO(ldo5, LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
210 	PM800_LDO(ldo6, LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
211 	PM800_LDO(ldo7, LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
212 	PM800_LDO(ldo8, LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
213 	PM800_LDO(ldo9, LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
214 	PM800_LDO(ldo10, LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
215 	PM800_LDO(ldo11, LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
216 	PM800_LDO(ldo12, LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
217 	PM800_LDO(ldo13, LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
218 	PM800_LDO(ldo14, LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
219 	PM800_LDO(ldo15, LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
220 	PM800_LDO(ldo16, LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
221 	PM800_LDO(ldo17, LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
222 	PM800_LDO(ldo18, LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
223 	PM800_LDO(ldo19, LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
224 };
225 
pm800_regulator_probe(struct platform_device * pdev)226 static int pm800_regulator_probe(struct platform_device *pdev)
227 {
228 	struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
229 	struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
230 	struct regulator_config config = { };
231 	struct regulator_init_data *init_data;
232 	int i, ret;
233 
234 	if (pdata && pdata->num_regulators) {
235 		unsigned int count = 0;
236 
237 		/* Check whether num_regulator is valid. */
238 		for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
239 			if (pdata->regulators[i])
240 				count++;
241 		}
242 		if (count != pdata->num_regulators)
243 			return -EINVAL;
244 	}
245 
246 	config.dev = chip->dev;
247 	config.regmap = chip->subchip->regmap_power;
248 	for (i = 0; i < PM800_ID_RG_MAX; i++) {
249 		struct regulator_dev *regulator;
250 
251 		if (pdata && pdata->num_regulators) {
252 			init_data = pdata->regulators[i];
253 			if (!init_data)
254 				continue;
255 
256 			config.init_data = init_data;
257 		}
258 
259 		config.driver_data = &pm800_regulator_info[i];
260 
261 		regulator = devm_regulator_register(&pdev->dev,
262 				&pm800_regulator_info[i].desc, &config);
263 		if (IS_ERR(regulator)) {
264 			ret = PTR_ERR(regulator);
265 			dev_err(&pdev->dev, "Failed to register %s\n",
266 					pm800_regulator_info[i].desc.name);
267 			return ret;
268 		}
269 	}
270 
271 	return 0;
272 }
273 
274 static struct platform_driver pm800_regulator_driver = {
275 	.driver		= {
276 		.name	= "88pm80x-regulator",
277 	},
278 	.probe		= pm800_regulator_probe,
279 };
280 
281 module_platform_driver(pm800_regulator_driver);
282 
283 MODULE_LICENSE("GPL");
284 MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
285 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
286 MODULE_ALIAS("platform:88pm800-regulator");
287