1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * tps65217-regulator.c
4 *
5 * Regulator driver for TPS65217 PMIC
6 *
7 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/device.h>
13 #include <linux/init.h>
14 #include <linux/err.h>
15 #include <linux/platform_device.h>
16
17 #include <linux/regulator/of_regulator.h>
18 #include <linux/regulator/driver.h>
19 #include <linux/regulator/machine.h>
20 #include <linux/mfd/tps65217.h>
21
22 #define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \
23 _t, _lr, _nlr, _sr, _sm) \
24 { \
25 .name = _name, \
26 .id = _id, \
27 .of_match = of_match_ptr(_of_match), \
28 .regulators_node= of_match_ptr("regulators"), \
29 .ops = &_ops, \
30 .n_voltages = _n, \
31 .type = REGULATOR_VOLTAGE, \
32 .owner = THIS_MODULE, \
33 .vsel_reg = _vr, \
34 .vsel_mask = _vm, \
35 .enable_reg = TPS65217_REG_ENABLE, \
36 .enable_mask = _em, \
37 .volt_table = _t, \
38 .linear_ranges = _lr, \
39 .n_linear_ranges = _nlr, \
40 .bypass_reg = _sr, \
41 .bypass_mask = _sm, \
42 } \
43
44 static const unsigned int LDO1_VSEL_table[] = {
45 1000000, 1100000, 1200000, 1250000,
46 1300000, 1350000, 1400000, 1500000,
47 1600000, 1800000, 2500000, 2750000,
48 2800000, 3000000, 3100000, 3300000,
49 };
50
51 static const struct linear_range tps65217_uv1_ranges[] = {
52 REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
53 REGULATOR_LINEAR_RANGE(1550000, 25, 52, 50000),
54 REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
55 REGULATOR_LINEAR_RANGE(3300000, 56, 63, 0),
56 };
57
58 static const struct linear_range tps65217_uv2_ranges[] = {
59 REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
60 REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
61 REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
62 };
63
tps65217_pmic_enable(struct regulator_dev * dev)64 static int tps65217_pmic_enable(struct regulator_dev *dev)
65 {
66 struct tps65217 *tps = rdev_get_drvdata(dev);
67 int rid = rdev_get_id(dev);
68
69 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
70 return -EINVAL;
71
72 /* Enable the regulator and password protection is level 1 */
73 return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
74 dev->desc->enable_mask, dev->desc->enable_mask,
75 TPS65217_PROTECT_L1);
76 }
77
tps65217_pmic_disable(struct regulator_dev * dev)78 static int tps65217_pmic_disable(struct regulator_dev *dev)
79 {
80 struct tps65217 *tps = rdev_get_drvdata(dev);
81 int rid = rdev_get_id(dev);
82
83 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
84 return -EINVAL;
85
86 /* Disable the regulator and password protection is level 1 */
87 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
88 dev->desc->enable_mask, TPS65217_PROTECT_L1);
89 }
90
tps65217_pmic_set_voltage_sel(struct regulator_dev * dev,unsigned selector)91 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
92 unsigned selector)
93 {
94 int ret;
95 struct tps65217 *tps = rdev_get_drvdata(dev);
96 unsigned int rid = rdev_get_id(dev);
97
98 /* Set the voltage based on vsel value and write protect level is 2 */
99 ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
100 selector, TPS65217_PROTECT_L2);
101
102 /* Set GO bit for DCDCx to initiate voltage transistion */
103 switch (rid) {
104 case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
105 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
106 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
107 TPS65217_PROTECT_L2);
108 break;
109 }
110
111 return ret;
112 }
113
tps65217_pmic_set_suspend_enable(struct regulator_dev * dev)114 static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev)
115 {
116 struct tps65217 *tps = rdev_get_drvdata(dev);
117 unsigned int rid = rdev_get_id(dev);
118
119 if (rid > TPS65217_LDO_4)
120 return -EINVAL;
121
122 return tps65217_clear_bits(tps, dev->desc->bypass_reg,
123 dev->desc->bypass_mask,
124 TPS65217_PROTECT_L1);
125 }
126
tps65217_pmic_set_suspend_disable(struct regulator_dev * dev)127 static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev)
128 {
129 struct tps65217 *tps = rdev_get_drvdata(dev);
130 unsigned int rid = rdev_get_id(dev);
131
132 if (rid > TPS65217_LDO_4)
133 return -EINVAL;
134
135 if (!tps->strobes[rid])
136 return -EINVAL;
137
138 return tps65217_set_bits(tps, dev->desc->bypass_reg,
139 dev->desc->bypass_mask,
140 tps->strobes[rid], TPS65217_PROTECT_L1);
141 }
142
143 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
144 static const struct regulator_ops tps65217_pmic_ops = {
145 .is_enabled = regulator_is_enabled_regmap,
146 .enable = tps65217_pmic_enable,
147 .disable = tps65217_pmic_disable,
148 .get_voltage_sel = regulator_get_voltage_sel_regmap,
149 .set_voltage_sel = tps65217_pmic_set_voltage_sel,
150 .list_voltage = regulator_list_voltage_linear_range,
151 .map_voltage = regulator_map_voltage_linear_range,
152 .set_suspend_enable = tps65217_pmic_set_suspend_enable,
153 .set_suspend_disable = tps65217_pmic_set_suspend_disable,
154 };
155
156 /* Operations permitted on LDO1 */
157 static const struct regulator_ops tps65217_pmic_ldo1_ops = {
158 .is_enabled = regulator_is_enabled_regmap,
159 .enable = tps65217_pmic_enable,
160 .disable = tps65217_pmic_disable,
161 .get_voltage_sel = regulator_get_voltage_sel_regmap,
162 .set_voltage_sel = tps65217_pmic_set_voltage_sel,
163 .list_voltage = regulator_list_voltage_table,
164 .map_voltage = regulator_map_voltage_ascend,
165 .set_suspend_enable = tps65217_pmic_set_suspend_enable,
166 .set_suspend_disable = tps65217_pmic_set_suspend_disable,
167 };
168
169 static const struct regulator_desc regulators[] = {
170 TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
171 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
172 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
173 NULL, tps65217_uv1_ranges,
174 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
175 TPS65217_SEQ1_DC1_SEQ_MASK),
176 TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
177 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
178 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
179 NULL, tps65217_uv1_ranges,
180 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
181 TPS65217_SEQ1_DC2_SEQ_MASK),
182 TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
183 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
184 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
185 NULL, tps65217_uv1_ranges,
186 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ2,
187 TPS65217_SEQ2_DC3_SEQ_MASK),
188 TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
189 tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
190 TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
191 LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2,
192 TPS65217_SEQ2_LDO1_SEQ_MASK),
193 TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
194 64, TPS65217_REG_DEFLDO2,
195 TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
196 NULL, tps65217_uv1_ranges,
197 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3,
198 TPS65217_SEQ3_LDO2_SEQ_MASK),
199 TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
200 32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
201 TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
202 NULL, tps65217_uv2_ranges,
203 ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3,
204 TPS65217_SEQ3_LDO3_SEQ_MASK),
205 TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
206 32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
207 TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
208 NULL, tps65217_uv2_ranges,
209 ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4,
210 TPS65217_SEQ4_LDO4_SEQ_MASK),
211 };
212
tps65217_regulator_probe(struct platform_device * pdev)213 static int tps65217_regulator_probe(struct platform_device *pdev)
214 {
215 struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
216 struct tps65217_board *pdata = dev_get_platdata(tps->dev);
217 struct regulator_dev *rdev;
218 struct regulator_config config = { };
219 int i, ret;
220 unsigned int val;
221
222 /* Allocate memory for strobes */
223 tps->strobes = devm_kcalloc(&pdev->dev,
224 TPS65217_NUM_REGULATOR, sizeof(u8),
225 GFP_KERNEL);
226 if (!tps->strobes)
227 return -ENOMEM;
228
229 platform_set_drvdata(pdev, tps);
230
231 for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
232 /* Register the regulators */
233 config.dev = tps->dev;
234 if (pdata)
235 config.init_data = pdata->tps65217_init_data[i];
236 config.driver_data = tps;
237 config.regmap = tps->regmap;
238
239 rdev = devm_regulator_register(&pdev->dev, ®ulators[i],
240 &config);
241 if (IS_ERR(rdev)) {
242 dev_err(tps->dev, "failed to register %s regulator\n",
243 pdev->name);
244 return PTR_ERR(rdev);
245 }
246
247 /* Store default strobe info */
248 ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val);
249 if (ret)
250 return ret;
251
252 tps->strobes[i] = val & regulators[i].bypass_mask;
253 }
254
255 return 0;
256 }
257
258 static struct platform_driver tps65217_regulator_driver = {
259 .driver = {
260 .name = "tps65217-pmic",
261 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
262 },
263 .probe = tps65217_regulator_probe,
264 };
265
tps65217_regulator_init(void)266 static int __init tps65217_regulator_init(void)
267 {
268 return platform_driver_register(&tps65217_regulator_driver);
269 }
270 subsys_initcall(tps65217_regulator_init);
271
tps65217_regulator_exit(void)272 static void __exit tps65217_regulator_exit(void)
273 {
274 platform_driver_unregister(&tps65217_regulator_driver);
275 }
276 module_exit(tps65217_regulator_exit);
277
278 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
279 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
280 MODULE_ALIAS("platform:tps65217-pmic");
281 MODULE_LICENSE("GPL v2");
282
