1 /*
2  * tps65218-regulator.c
3  *
4  * Regulator driver for TPS65218 PMIC
5  *
6  * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13  * kind, whether expressed or implied; without even the implied warranty
14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License version 2 for more details.
16  */
17 
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/device.h>
21 #include <linux/init.h>
22 #include <linux/err.h>
23 #include <linux/platform_device.h>
24 #include <linux/of_device.h>
25 #include <linux/regulator/of_regulator.h>
26 #include <linux/regulator/driver.h>
27 #include <linux/regulator/machine.h>
28 #include <linux/mfd/tps65218.h>
29 
30 enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, DCDC5, DCDC6, LDO1 };
31 
32 #define TPS65218_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _er, _em, \
33 			    _lr, _nlr, _delay, _fuv)		\
34 	{							\
35 		.name			= _name,		\
36 		.id			= _id,			\
37 		.ops			= &_ops,		\
38 		.n_voltages		= _n,			\
39 		.type			= REGULATOR_VOLTAGE,	\
40 		.owner			= THIS_MODULE,		\
41 		.vsel_reg		= _vr,			\
42 		.vsel_mask		= _vm,			\
43 		.enable_reg		= _er,			\
44 		.enable_mask		= _em,			\
45 		.volt_table		= NULL,			\
46 		.linear_ranges		= _lr,			\
47 		.n_linear_ranges	= _nlr,			\
48 		.ramp_delay		= _delay,		\
49 		.fixed_uV		= _fuv			\
50 	}							\
51 
52 #define TPS65218_INFO(_id, _nm, _min, _max)	\
53 	[_id] = {					\
54 		.id		= _id,			\
55 		.name		= _nm,			\
56 		.min_uV		= _min,			\
57 		.max_uV		= _max,			\
58 	}
59 
60 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
61 	REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
62 	REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
63 };
64 
65 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
66 	REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
67 	REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
68 };
69 
70 static const struct regulator_linear_range dcdc4_ranges[] = {
71 	REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
72 	REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
73 };
74 
75 static struct tps_info tps65218_pmic_regs[] = {
76 	TPS65218_INFO(DCDC1, "DCDC1", 850000, 167500),
77 	TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000),
78 	TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000),
79 	TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000),
80 	TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000),
81 	TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000),
82 	TPS65218_INFO(LDO1, "LDO1", 900000, 3400000),
83 };
84 
85 #define TPS65218_OF_MATCH(comp, label) \
86 	{ \
87 		.compatible = comp, \
88 		.data = &label, \
89 	}
90 
91 static const struct of_device_id tps65218_of_match[] = {
92 	TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
93 	TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
94 	TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
95 	TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
96 	TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
97 	TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
98 	TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
99 	{ }
100 };
101 MODULE_DEVICE_TABLE(of, tps65218_of_match);
102 
103 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
104 					 unsigned selector)
105 {
106 	int ret;
107 	struct tps65218 *tps = rdev_get_drvdata(dev);
108 	unsigned int rid = rdev_get_id(dev);
109 
110 	/* Set the voltage based on vsel value and write protect level is 2 */
111 	ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
112 				selector, TPS65218_PROTECT_L1);
113 
114 	/* Set GO bit for DCDC1/2 to initiate voltage transistion */
115 	switch (rid) {
116 	case TPS65218_DCDC_1:
117 	case TPS65218_DCDC_2:
118 		ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
119 					TPS65218_SLEW_RATE_GO,
120 					TPS65218_SLEW_RATE_GO,
121 					TPS65218_PROTECT_L1);
122 		break;
123 	}
124 
125 	return ret;
126 }
127 
128 static int tps65218_pmic_enable(struct regulator_dev *dev)
129 {
130 	struct tps65218 *tps = rdev_get_drvdata(dev);
131 	int rid = rdev_get_id(dev);
132 
133 	if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
134 		return -EINVAL;
135 
136 	/* Enable the regulator and password protection is level 1 */
137 	return tps65218_set_bits(tps, dev->desc->enable_reg,
138 				 dev->desc->enable_mask, dev->desc->enable_mask,
139 				 TPS65218_PROTECT_L1);
140 }
141 
142 static int tps65218_pmic_disable(struct regulator_dev *dev)
143 {
144 	struct tps65218 *tps = rdev_get_drvdata(dev);
145 	int rid = rdev_get_id(dev);
146 
147 	if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
148 		return -EINVAL;
149 
150 	/* Disable the regulator and password protection is level 1 */
151 	return tps65218_clear_bits(tps, dev->desc->enable_reg,
152 				   dev->desc->enable_mask, TPS65218_PROTECT_L1);
153 }
154 
155 /* Operations permitted on DCDC1, DCDC2 */
156 static struct regulator_ops tps65218_dcdc12_ops = {
157 	.is_enabled		= regulator_is_enabled_regmap,
158 	.enable			= tps65218_pmic_enable,
159 	.disable		= tps65218_pmic_disable,
160 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
161 	.set_voltage_sel	= tps65218_pmic_set_voltage_sel,
162 	.list_voltage		= regulator_list_voltage_linear_range,
163 	.map_voltage		= regulator_map_voltage_linear_range,
164 	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
165 };
166 
167 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
168 static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
169 	.is_enabled		= regulator_is_enabled_regmap,
170 	.enable			= tps65218_pmic_enable,
171 	.disable		= tps65218_pmic_disable,
172 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
173 	.set_voltage_sel	= tps65218_pmic_set_voltage_sel,
174 	.list_voltage		= regulator_list_voltage_linear_range,
175 	.map_voltage		= regulator_map_voltage_linear_range,
176 };
177 
178 /* Operations permitted on DCDC5, DCDC6 */
179 static struct regulator_ops tps65218_dcdc56_pmic_ops = {
180 	.is_enabled		= regulator_is_enabled_regmap,
181 	.enable			= tps65218_pmic_enable,
182 	.disable		= tps65218_pmic_disable,
183 };
184 
185 static const struct regulator_desc regulators[] = {
186 	TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64,
187 			   TPS65218_REG_CONTROL_DCDC1,
188 			   TPS65218_CONTROL_DCDC1_MASK,
189 			   TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN,
190 			   dcdc1_dcdc2_ranges, 2, 4000, 0),
191 	TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64,
192 			   TPS65218_REG_CONTROL_DCDC2,
193 			   TPS65218_CONTROL_DCDC2_MASK,
194 			   TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN,
195 			   dcdc1_dcdc2_ranges, 2, 4000, 0),
196 	TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops,
197 			   64, TPS65218_REG_CONTROL_DCDC3,
198 			   TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
199 			   TPS65218_ENABLE1_DC3_EN, ldo1_dcdc3_ranges, 2, 0, 0),
200 	TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, tps65218_ldo1_dcdc34_ops,
201 			   53, TPS65218_REG_CONTROL_DCDC4,
202 			   TPS65218_CONTROL_DCDC4_MASK,
203 			   TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC4_EN,
204 			   dcdc4_ranges, 2, 0, 0),
205 	TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, tps65218_dcdc56_pmic_ops,
206 			   1, -1, -1, TPS65218_REG_ENABLE1,
207 			   TPS65218_ENABLE1_DC5_EN, NULL, 0, 0, 1000000),
208 	TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops,
209 			   1, -1, -1, TPS65218_REG_ENABLE1,
210 			   TPS65218_ENABLE1_DC6_EN, NULL, 0, 0, 1800000),
211 	TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, tps65218_ldo1_dcdc34_ops, 64,
212 			   TPS65218_REG_CONTROL_LDO1,
213 			   TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
214 			   TPS65218_ENABLE2_LDO1_EN, ldo1_dcdc3_ranges,
215 			   2, 0, 0),
216 };
217 
218 static int tps65218_regulator_probe(struct platform_device *pdev)
219 {
220 	struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
221 	struct regulator_init_data *init_data;
222 	const struct tps_info	*template;
223 	struct regulator_dev *rdev;
224 	const struct of_device_id	*match;
225 	struct regulator_config config = { };
226 	int id;
227 
228 	match = of_match_device(tps65218_of_match, &pdev->dev);
229 	if (!match)
230 		return -ENODEV;
231 
232 	template = match->data;
233 	id = template->id;
234 	init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
235 					       &regulators[id]);
236 
237 	platform_set_drvdata(pdev, tps);
238 
239 	tps->info[id] = &tps65218_pmic_regs[id];
240 	config.dev = &pdev->dev;
241 	config.init_data = init_data;
242 	config.driver_data = tps;
243 	config.regmap = tps->regmap;
244 	config.of_node = pdev->dev.of_node;
245 
246 	rdev = devm_regulator_register(&pdev->dev, &regulators[id], &config);
247 	if (IS_ERR(rdev)) {
248 		dev_err(tps->dev, "failed to register %s regulator\n",
249 			pdev->name);
250 		return PTR_ERR(rdev);
251 	}
252 
253 	return 0;
254 }
255 
256 static struct platform_driver tps65218_regulator_driver = {
257 	.driver = {
258 		.name = "tps65218-pmic",
259 		.of_match_table = tps65218_of_match,
260 	},
261 	.probe = tps65218_regulator_probe,
262 };
263 
264 module_platform_driver(tps65218_regulator_driver);
265 
266 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
267 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
268 MODULE_ALIAS("platform:tps65218-pmic");
269 MODULE_LICENSE("GPL v2");
270