1 /*
2 * tps65217-regulator.c
3 *
4 * Regulator driver for TPS65217 PMIC
5 *
6 * Copyright (C) 2011 Texas Instruments Incorporated - https://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 as
10 * published by the Free Software Foundation version 2.
11 *
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13 * kind, whether express or implied; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License 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
25 #include <linux/regulator/of_regulator.h>
26 #include <linux/regulator/driver.h>
27 #include <linux/regulator/machine.h>
28 #include <linux/mfd/tps65217.h>
29
30 #define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \
31 _t, _lr, _nlr, _sr, _sm) \
32 { \
33 .name = _name, \
34 .id = _id, \
35 .of_match = of_match_ptr(_of_match), \
36 .regulators_node= of_match_ptr("regulators"), \
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 = TPS65217_REG_ENABLE, \
44 .enable_mask = _em, \
45 .volt_table = _t, \
46 .linear_ranges = _lr, \
47 .n_linear_ranges = _nlr, \
48 .bypass_reg = _sr, \
49 .bypass_mask = _sm, \
50 } \
51
52 static const unsigned int LDO1_VSEL_table[] = {
53 1000000, 1100000, 1200000, 1250000,
54 1300000, 1350000, 1400000, 1500000,
55 1600000, 1800000, 2500000, 2750000,
56 2800000, 3000000, 3100000, 3300000,
57 };
58
59 static const struct linear_range tps65217_uv1_ranges[] = {
60 REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
61 REGULATOR_LINEAR_RANGE(1550000, 25, 52, 50000),
62 REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
63 REGULATOR_LINEAR_RANGE(3300000, 56, 63, 0),
64 };
65
66 static const struct linear_range tps65217_uv2_ranges[] = {
67 REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
68 REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
69 REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
70 };
71
tps65217_pmic_enable(struct regulator_dev * dev)72 static int tps65217_pmic_enable(struct regulator_dev *dev)
73 {
74 struct tps65217 *tps = rdev_get_drvdata(dev);
75 int rid = rdev_get_id(dev);
76
77 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
78 return -EINVAL;
79
80 /* Enable the regulator and password protection is level 1 */
81 return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
82 dev->desc->enable_mask, dev->desc->enable_mask,
83 TPS65217_PROTECT_L1);
84 }
85
tps65217_pmic_disable(struct regulator_dev * dev)86 static int tps65217_pmic_disable(struct regulator_dev *dev)
87 {
88 struct tps65217 *tps = rdev_get_drvdata(dev);
89 int rid = rdev_get_id(dev);
90
91 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
92 return -EINVAL;
93
94 /* Disable the regulator and password protection is level 1 */
95 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
96 dev->desc->enable_mask, TPS65217_PROTECT_L1);
97 }
98
tps65217_pmic_set_voltage_sel(struct regulator_dev * dev,unsigned selector)99 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
100 unsigned selector)
101 {
102 int ret;
103 struct tps65217 *tps = rdev_get_drvdata(dev);
104 unsigned int rid = rdev_get_id(dev);
105
106 /* Set the voltage based on vsel value and write protect level is 2 */
107 ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
108 selector, TPS65217_PROTECT_L2);
109
110 /* Set GO bit for DCDCx to initiate voltage transistion */
111 switch (rid) {
112 case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
113 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
114 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
115 TPS65217_PROTECT_L2);
116 break;
117 }
118
119 return ret;
120 }
121
tps65217_pmic_set_suspend_enable(struct regulator_dev * dev)122 static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev)
123 {
124 struct tps65217 *tps = rdev_get_drvdata(dev);
125 unsigned int rid = rdev_get_id(dev);
126
127 if (rid > TPS65217_LDO_4)
128 return -EINVAL;
129
130 return tps65217_clear_bits(tps, dev->desc->bypass_reg,
131 dev->desc->bypass_mask,
132 TPS65217_PROTECT_L1);
133 }
134
tps65217_pmic_set_suspend_disable(struct regulator_dev * dev)135 static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev)
136 {
137 struct tps65217 *tps = rdev_get_drvdata(dev);
138 unsigned int rid = rdev_get_id(dev);
139
140 if (rid > TPS65217_LDO_4)
141 return -EINVAL;
142
143 if (!tps->strobes[rid])
144 return -EINVAL;
145
146 return tps65217_set_bits(tps, dev->desc->bypass_reg,
147 dev->desc->bypass_mask,
148 tps->strobes[rid], TPS65217_PROTECT_L1);
149 }
150
151 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
152 static const struct regulator_ops tps65217_pmic_ops = {
153 .is_enabled = regulator_is_enabled_regmap,
154 .enable = tps65217_pmic_enable,
155 .disable = tps65217_pmic_disable,
156 .get_voltage_sel = regulator_get_voltage_sel_regmap,
157 .set_voltage_sel = tps65217_pmic_set_voltage_sel,
158 .list_voltage = regulator_list_voltage_linear_range,
159 .map_voltage = regulator_map_voltage_linear_range,
160 .set_suspend_enable = tps65217_pmic_set_suspend_enable,
161 .set_suspend_disable = tps65217_pmic_set_suspend_disable,
162 };
163
164 /* Operations permitted on LDO1 */
165 static const struct regulator_ops tps65217_pmic_ldo1_ops = {
166 .is_enabled = regulator_is_enabled_regmap,
167 .enable = tps65217_pmic_enable,
168 .disable = tps65217_pmic_disable,
169 .get_voltage_sel = regulator_get_voltage_sel_regmap,
170 .set_voltage_sel = tps65217_pmic_set_voltage_sel,
171 .list_voltage = regulator_list_voltage_table,
172 .map_voltage = regulator_map_voltage_ascend,
173 .set_suspend_enable = tps65217_pmic_set_suspend_enable,
174 .set_suspend_disable = tps65217_pmic_set_suspend_disable,
175 };
176
177 static const struct regulator_desc regulators[] = {
178 TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
179 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
180 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
181 NULL, tps65217_uv1_ranges,
182 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
183 TPS65217_SEQ1_DC1_SEQ_MASK),
184 TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
185 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
186 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
187 NULL, tps65217_uv1_ranges,
188 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
189 TPS65217_SEQ1_DC2_SEQ_MASK),
190 TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
191 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
192 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
193 NULL, tps65217_uv1_ranges,
194 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ2,
195 TPS65217_SEQ2_DC3_SEQ_MASK),
196 TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
197 tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
198 TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
199 LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2,
200 TPS65217_SEQ2_LDO1_SEQ_MASK),
201 TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
202 64, TPS65217_REG_DEFLDO2,
203 TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
204 NULL, tps65217_uv1_ranges,
205 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3,
206 TPS65217_SEQ3_LDO2_SEQ_MASK),
207 TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
208 32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
209 TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
210 NULL, tps65217_uv2_ranges,
211 ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3,
212 TPS65217_SEQ3_LDO3_SEQ_MASK),
213 TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
214 32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
215 TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
216 NULL, tps65217_uv2_ranges,
217 ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4,
218 TPS65217_SEQ4_LDO4_SEQ_MASK),
219 };
220
tps65217_regulator_probe(struct platform_device * pdev)221 static int tps65217_regulator_probe(struct platform_device *pdev)
222 {
223 struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
224 struct tps65217_board *pdata = dev_get_platdata(tps->dev);
225 struct regulator_dev *rdev;
226 struct regulator_config config = { };
227 int i, ret;
228 unsigned int val;
229
230 /* Allocate memory for strobes */
231 tps->strobes = devm_kcalloc(&pdev->dev,
232 TPS65217_NUM_REGULATOR, sizeof(u8),
233 GFP_KERNEL);
234 if (!tps->strobes)
235 return -ENOMEM;
236
237 platform_set_drvdata(pdev, tps);
238
239 for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
240 /* Register the regulators */
241 config.dev = tps->dev;
242 if (pdata)
243 config.init_data = pdata->tps65217_init_data[i];
244 config.driver_data = tps;
245 config.regmap = tps->regmap;
246
247 rdev = devm_regulator_register(&pdev->dev, ®ulators[i],
248 &config);
249 if (IS_ERR(rdev)) {
250 dev_err(tps->dev, "failed to register %s regulator\n",
251 pdev->name);
252 return PTR_ERR(rdev);
253 }
254
255 /* Store default strobe info */
256 ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val);
257 if (ret)
258 return ret;
259
260 tps->strobes[i] = val & regulators[i].bypass_mask;
261 }
262
263 return 0;
264 }
265
266 static struct platform_driver tps65217_regulator_driver = {
267 .driver = {
268 .name = "tps65217-pmic",
269 },
270 .probe = tps65217_regulator_probe,
271 };
272
tps65217_regulator_init(void)273 static int __init tps65217_regulator_init(void)
274 {
275 return platform_driver_register(&tps65217_regulator_driver);
276 }
277 subsys_initcall(tps65217_regulator_init);
278
tps65217_regulator_exit(void)279 static void __exit tps65217_regulator_exit(void)
280 {
281 platform_driver_unregister(&tps65217_regulator_driver);
282 }
283 module_exit(tps65217_regulator_exit);
284
285 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
286 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
287 MODULE_ALIAS("platform:tps65217-pmic");
288 MODULE_LICENSE("GPL v2");
289