1 /*
2 * tps65217-regulator.c
3 *
4 * Regulator driver for TPS65217 PMIC
5 *
6 * Copyright (C) 2011 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 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 regulator_linear_range tps65217_uv1_ranges[] = {
60 REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
61 REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000),
62 REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000),
63 REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
64 REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0),
65 };
66
67 static const struct regulator_linear_range tps65217_uv2_ranges[] = {
68 REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
69 REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
70 REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
71 };
72
tps65217_pmic_enable(struct regulator_dev * dev)73 static int tps65217_pmic_enable(struct regulator_dev *dev)
74 {
75 struct tps65217 *tps = rdev_get_drvdata(dev);
76 int rid = rdev_get_id(dev);
77
78 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
79 return -EINVAL;
80
81 /* Enable the regulator and password protection is level 1 */
82 return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
83 dev->desc->enable_mask, dev->desc->enable_mask,
84 TPS65217_PROTECT_L1);
85 }
86
tps65217_pmic_disable(struct regulator_dev * dev)87 static int tps65217_pmic_disable(struct regulator_dev *dev)
88 {
89 struct tps65217 *tps = rdev_get_drvdata(dev);
90 int rid = rdev_get_id(dev);
91
92 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
93 return -EINVAL;
94
95 /* Disable the regulator and password protection is level 1 */
96 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
97 dev->desc->enable_mask, TPS65217_PROTECT_L1);
98 }
99
tps65217_pmic_set_voltage_sel(struct regulator_dev * dev,unsigned selector)100 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
101 unsigned selector)
102 {
103 int ret;
104 struct tps65217 *tps = rdev_get_drvdata(dev);
105 unsigned int rid = rdev_get_id(dev);
106
107 /* Set the voltage based on vsel value and write protect level is 2 */
108 ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
109 selector, TPS65217_PROTECT_L2);
110
111 /* Set GO bit for DCDCx to initiate voltage transistion */
112 switch (rid) {
113 case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
114 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
115 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
116 TPS65217_PROTECT_L2);
117 break;
118 }
119
120 return ret;
121 }
122
tps65217_pmic_set_suspend_enable(struct regulator_dev * dev)123 static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev)
124 {
125 struct tps65217 *tps = rdev_get_drvdata(dev);
126 unsigned int rid = rdev_get_id(dev);
127
128 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
129 return -EINVAL;
130
131 return tps65217_clear_bits(tps, dev->desc->bypass_reg,
132 dev->desc->bypass_mask,
133 TPS65217_PROTECT_L1);
134 }
135
tps65217_pmic_set_suspend_disable(struct regulator_dev * dev)136 static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev)
137 {
138 struct tps65217 *tps = rdev_get_drvdata(dev);
139 unsigned int rid = rdev_get_id(dev);
140
141 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
142 return -EINVAL;
143
144 if (!tps->strobes[rid])
145 return -EINVAL;
146
147 return tps65217_set_bits(tps, dev->desc->bypass_reg,
148 dev->desc->bypass_mask,
149 tps->strobes[rid], TPS65217_PROTECT_L1);
150 }
151
152 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
153 static struct regulator_ops tps65217_pmic_ops = {
154 .is_enabled = regulator_is_enabled_regmap,
155 .enable = tps65217_pmic_enable,
156 .disable = tps65217_pmic_disable,
157 .get_voltage_sel = regulator_get_voltage_sel_regmap,
158 .set_voltage_sel = tps65217_pmic_set_voltage_sel,
159 .list_voltage = regulator_list_voltage_linear_range,
160 .map_voltage = regulator_map_voltage_linear_range,
161 .set_suspend_enable = tps65217_pmic_set_suspend_enable,
162 .set_suspend_disable = tps65217_pmic_set_suspend_disable,
163 };
164
165 /* Operations permitted on LDO1 */
166 static struct regulator_ops tps65217_pmic_ldo1_ops = {
167 .is_enabled = regulator_is_enabled_regmap,
168 .enable = tps65217_pmic_enable,
169 .disable = tps65217_pmic_disable,
170 .get_voltage_sel = regulator_get_voltage_sel_regmap,
171 .set_voltage_sel = tps65217_pmic_set_voltage_sel,
172 .list_voltage = regulator_list_voltage_table,
173 .map_voltage = regulator_map_voltage_ascend,
174 .set_suspend_enable = tps65217_pmic_set_suspend_enable,
175 .set_suspend_disable = tps65217_pmic_set_suspend_disable,
176 };
177
178 static const struct regulator_desc regulators[] = {
179 TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
180 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
181 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
182 NULL, tps65217_uv1_ranges,
183 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
184 TPS65217_SEQ1_DC1_SEQ_MASK),
185 TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
186 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
187 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
188 NULL, tps65217_uv1_ranges,
189 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
190 TPS65217_SEQ1_DC2_SEQ_MASK),
191 TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
192 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
193 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
194 NULL, tps65217_uv1_ranges,
195 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ2,
196 TPS65217_SEQ2_DC3_SEQ_MASK),
197 TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
198 tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
199 TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
200 LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2,
201 TPS65217_SEQ2_LDO1_SEQ_MASK),
202 TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
203 64, TPS65217_REG_DEFLDO2,
204 TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
205 NULL, tps65217_uv1_ranges,
206 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3,
207 TPS65217_SEQ3_LDO2_SEQ_MASK),
208 TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
209 32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
210 TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
211 NULL, tps65217_uv2_ranges,
212 ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3,
213 TPS65217_SEQ3_LDO3_SEQ_MASK),
214 TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
215 32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
216 TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
217 NULL, tps65217_uv2_ranges,
218 ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4,
219 TPS65217_SEQ4_LDO4_SEQ_MASK),
220 };
221
tps65217_regulator_probe(struct platform_device * pdev)222 static int tps65217_regulator_probe(struct platform_device *pdev)
223 {
224 struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
225 struct tps65217_board *pdata = dev_get_platdata(tps->dev);
226 struct regulator_dev *rdev;
227 struct regulator_config config = { };
228 int i, ret;
229 unsigned int val;
230
231 /* Allocate memory for strobes */
232 tps->strobes = devm_kcalloc(&pdev->dev,
233 TPS65217_NUM_REGULATOR, sizeof(u8),
234 GFP_KERNEL);
235 if (!tps->strobes)
236 return -ENOMEM;
237
238 platform_set_drvdata(pdev, tps);
239
240 for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
241 /* Register the regulators */
242 config.dev = tps->dev;
243 if (pdata)
244 config.init_data = pdata->tps65217_init_data[i];
245 config.driver_data = tps;
246 config.regmap = tps->regmap;
247
248 rdev = devm_regulator_register(&pdev->dev, ®ulators[i],
249 &config);
250 if (IS_ERR(rdev)) {
251 dev_err(tps->dev, "failed to register %s regulator\n",
252 pdev->name);
253 return PTR_ERR(rdev);
254 }
255
256 /* Store default strobe info */
257 ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val);
258 tps->strobes[i] = val & regulators[i].bypass_mask;
259 }
260
261 return 0;
262 }
263
264 static struct platform_driver tps65217_regulator_driver = {
265 .driver = {
266 .name = "tps65217-pmic",
267 },
268 .probe = tps65217_regulator_probe,
269 };
270
tps65217_regulator_init(void)271 static int __init tps65217_regulator_init(void)
272 {
273 return platform_driver_register(&tps65217_regulator_driver);
274 }
275 subsys_initcall(tps65217_regulator_init);
276
tps65217_regulator_exit(void)277 static void __exit tps65217_regulator_exit(void)
278 {
279 platform_driver_unregister(&tps65217_regulator_driver);
280 }
281 module_exit(tps65217_regulator_exit);
282
283 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
284 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
285 MODULE_ALIAS("platform:tps65217-pmic");
286 MODULE_LICENSE("GPL v2");
287