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, 1675000),
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
tps65218_pmic_set_voltage_sel(struct regulator_dev * dev,unsigned selector)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
tps65218_pmic_enable(struct regulator_dev * dev)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
tps65218_pmic_disable(struct regulator_dev * dev)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
tps65218_regulator_probe(struct platform_device * pdev)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 ®ulators[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, ®ulators[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