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a493077f AC |
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 | ||
1922b0f2 | 25 | #include <linux/regulator/of_regulator.h> |
a493077f AC |
26 | #include <linux/regulator/driver.h> |
27 | #include <linux/regulator/machine.h> | |
28 | #include <linux/mfd/tps65217.h> | |
29 | ||
6290d606 | 30 | #define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t, _lr, _nlr) \ |
a493077f AC |
31 | { \ |
32 | .name = _name, \ | |
33 | .id = _id, \ | |
34 | .ops = &_ops, \ | |
35 | .n_voltages = _n, \ | |
36 | .type = REGULATOR_VOLTAGE, \ | |
37 | .owner = THIS_MODULE, \ | |
b4bc9ef6 AL |
38 | .vsel_reg = _vr, \ |
39 | .vsel_mask = _vm, \ | |
40 | .enable_reg = TPS65217_REG_ENABLE, \ | |
41 | .enable_mask = _em, \ | |
d172f319 | 42 | .volt_table = _t, \ |
6290d606 AL |
43 | .linear_ranges = _lr, \ |
44 | .n_linear_ranges = _nlr, \ | |
a493077f AC |
45 | } \ |
46 | ||
d172f319 | 47 | static const unsigned int LDO1_VSEL_table[] = { |
a493077f AC |
48 | 1000000, 1100000, 1200000, 1250000, |
49 | 1300000, 1350000, 1400000, 1500000, | |
50 | 1600000, 1800000, 2500000, 2750000, | |
51 | 2800000, 3000000, 3100000, 3300000, | |
52 | }; | |
53 | ||
6290d606 | 54 | static const struct regulator_linear_range tps65217_uv1_ranges[] = { |
8828bae4 AL |
55 | REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000), |
56 | REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000), | |
57 | REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000), | |
58 | REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000), | |
59 | REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0), | |
6290d606 | 60 | }; |
a493077f | 61 | |
6290d606 | 62 | static const struct regulator_linear_range tps65217_uv2_ranges[] = { |
8828bae4 AL |
63 | REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000), |
64 | REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000), | |
65 | REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000), | |
a493077f AC |
66 | }; |
67 | ||
fc56911b | 68 | static int tps65217_pmic_enable(struct regulator_dev *dev) |
a493077f | 69 | { |
a493077f | 70 | struct tps65217 *tps = rdev_get_drvdata(dev); |
fc56911b | 71 | unsigned int rid = rdev_get_id(dev); |
a493077f | 72 | |
fc56911b | 73 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
74 | return -EINVAL; |
75 | ||
76 | /* Enable the regulator and password protection is level 1 */ | |
77 | return tps65217_set_bits(tps, TPS65217_REG_ENABLE, | |
b4bc9ef6 AL |
78 | dev->desc->enable_mask, dev->desc->enable_mask, |
79 | TPS65217_PROTECT_L1); | |
a493077f AC |
80 | } |
81 | ||
fc56911b | 82 | static int tps65217_pmic_disable(struct regulator_dev *dev) |
a493077f AC |
83 | { |
84 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
fc56911b | 85 | unsigned int rid = rdev_get_id(dev); |
a493077f | 86 | |
fc56911b | 87 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
88 | return -EINVAL; |
89 | ||
90 | /* Disable the regulator and password protection is level 1 */ | |
91 | return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, | |
b4bc9ef6 | 92 | dev->desc->enable_mask, TPS65217_PROTECT_L1); |
a493077f AC |
93 | } |
94 | ||
8b22285f AL |
95 | static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, |
96 | unsigned selector) | |
a493077f | 97 | { |
8b22285f | 98 | int ret; |
a493077f | 99 | struct tps65217 *tps = rdev_get_drvdata(dev); |
8b22285f | 100 | unsigned int rid = rdev_get_id(dev); |
a493077f | 101 | |
8b22285f | 102 | /* Set the voltage based on vsel value and write protect level is 2 */ |
b4bc9ef6 | 103 | ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, |
8b22285f | 104 | selector, TPS65217_PROTECT_L2); |
a493077f | 105 | |
8b22285f AL |
106 | /* Set GO bit for DCDCx to initiate voltage transistion */ |
107 | switch (rid) { | |
108 | case TPS65217_DCDC_1 ... TPS65217_DCDC_3: | |
109 | ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, | |
110 | TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, | |
111 | TPS65217_PROTECT_L2); | |
112 | break; | |
113 | } | |
a493077f | 114 | |
8b22285f | 115 | return ret; |
a493077f AC |
116 | } |
117 | ||
fc56911b AL |
118 | /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ |
119 | static struct regulator_ops tps65217_pmic_ops = { | |
b4bc9ef6 | 120 | .is_enabled = regulator_is_enabled_regmap, |
fc56911b AL |
121 | .enable = tps65217_pmic_enable, |
122 | .disable = tps65217_pmic_disable, | |
b4bc9ef6 | 123 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
8b22285f | 124 | .set_voltage_sel = tps65217_pmic_set_voltage_sel, |
6290d606 AL |
125 | .list_voltage = regulator_list_voltage_linear_range, |
126 | .map_voltage = regulator_map_voltage_linear_range, | |
a493077f AC |
127 | }; |
128 | ||
129 | /* Operations permitted on LDO1 */ | |
130 | static struct regulator_ops tps65217_pmic_ldo1_ops = { | |
b4bc9ef6 | 131 | .is_enabled = regulator_is_enabled_regmap, |
fc56911b AL |
132 | .enable = tps65217_pmic_enable, |
133 | .disable = tps65217_pmic_disable, | |
b4bc9ef6 | 134 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
8b22285f | 135 | .set_voltage_sel = tps65217_pmic_set_voltage_sel, |
d172f319 | 136 | .list_voltage = regulator_list_voltage_table, |
a493077f AC |
137 | }; |
138 | ||
78637a3d | 139 | static const struct regulator_desc regulators[] = { |
b4bc9ef6 AL |
140 | TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64, |
141 | TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK, | |
6290d606 AL |
142 | TPS65217_ENABLE_DC1_EN, NULL, tps65217_uv1_ranges, |
143 | 2), /* DCDC1 voltage range: 900000 ~ 1800000 */ | |
b4bc9ef6 AL |
144 | TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64, |
145 | TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK, | |
6290d606 AL |
146 | TPS65217_ENABLE_DC2_EN, NULL, tps65217_uv1_ranges, |
147 | ARRAY_SIZE(tps65217_uv1_ranges)), | |
b4bc9ef6 AL |
148 | TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64, |
149 | TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK, | |
6290d606 AL |
150 | TPS65217_ENABLE_DC3_EN, NULL, tps65217_uv1_ranges, |
151 | 1), /* DCDC3 voltage range: 900000 ~ 1500000 */ | |
b4bc9ef6 AL |
152 | TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16, |
153 | TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK, | |
6290d606 | 154 | TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table, NULL, 0), |
b4bc9ef6 AL |
155 | TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64, |
156 | TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK, | |
6290d606 AL |
157 | TPS65217_ENABLE_LDO2_EN, NULL, tps65217_uv1_ranges, |
158 | ARRAY_SIZE(tps65217_uv1_ranges)), | |
b4bc9ef6 AL |
159 | TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32, |
160 | TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, | |
d172f319 | 161 | TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, |
6290d606 AL |
162 | NULL, tps65217_uv2_ranges, |
163 | ARRAY_SIZE(tps65217_uv2_ranges)), | |
b4bc9ef6 AL |
164 | TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32, |
165 | TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, | |
d172f319 | 166 | TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, |
6290d606 AL |
167 | NULL, tps65217_uv2_ranges, |
168 | ARRAY_SIZE(tps65217_uv2_ranges)), | |
a493077f AC |
169 | }; |
170 | ||
1922b0f2 AC |
171 | #ifdef CONFIG_OF |
172 | static struct of_regulator_match reg_matches[] = { | |
173 | { .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 }, | |
174 | { .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 }, | |
175 | { .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 }, | |
176 | { .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 }, | |
177 | { .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 }, | |
178 | { .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 }, | |
179 | { .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 }, | |
180 | }; | |
181 | ||
182 | static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) | |
183 | { | |
184 | struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); | |
185 | struct device_node *node = tps->dev->of_node; | |
186 | struct tps65217_board *pdata; | |
187 | struct device_node *regs; | |
188 | int i, count; | |
189 | ||
190 | regs = of_find_node_by_name(node, "regulators"); | |
191 | if (!regs) | |
192 | return NULL; | |
193 | ||
5bce833c AL |
194 | count = of_regulator_match(&pdev->dev, regs, reg_matches, |
195 | TPS65217_NUM_REGULATOR); | |
1922b0f2 AC |
196 | of_node_put(regs); |
197 | if ((count < 0) || (count > TPS65217_NUM_REGULATOR)) | |
198 | return NULL; | |
199 | ||
200 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
201 | if (!pdata) | |
202 | return NULL; | |
203 | ||
204 | for (i = 0; i < count; i++) { | |
205 | if (!reg_matches[i].init_data || !reg_matches[i].of_node) | |
206 | continue; | |
207 | ||
208 | pdata->tps65217_init_data[i] = reg_matches[i].init_data; | |
209 | pdata->of_node[i] = reg_matches[i].of_node; | |
210 | } | |
211 | ||
212 | return pdata; | |
213 | } | |
214 | #else | |
215 | static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) | |
216 | { | |
217 | return NULL; | |
218 | } | |
219 | #endif | |
220 | ||
a5023574 | 221 | static int tps65217_regulator_probe(struct platform_device *pdev) |
a493077f | 222 | { |
1922b0f2 AC |
223 | struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); |
224 | struct tps65217_board *pdata = dev_get_platdata(tps->dev); | |
225 | struct regulator_init_data *reg_data; | |
a493077f | 226 | struct regulator_dev *rdev; |
c172708d | 227 | struct regulator_config config = { }; |
4aac198d | 228 | int i; |
a493077f | 229 | |
1922b0f2 AC |
230 | if (tps->dev->of_node) |
231 | pdata = tps65217_parse_dt(pdev); | |
a493077f | 232 | |
1922b0f2 AC |
233 | if (!pdata) { |
234 | dev_err(&pdev->dev, "Platform data not found\n"); | |
235 | return -EINVAL; | |
236 | } | |
c172708d | 237 | |
1922b0f2 AC |
238 | if (tps65217_chip_id(tps) != TPS65217) { |
239 | dev_err(&pdev->dev, "Invalid tps chip version\n"); | |
240 | return -ENODEV; | |
241 | } | |
a493077f | 242 | |
1922b0f2 | 243 | platform_set_drvdata(pdev, tps); |
a493077f | 244 | |
1922b0f2 AC |
245 | for (i = 0; i < TPS65217_NUM_REGULATOR; i++) { |
246 | ||
247 | reg_data = pdata->tps65217_init_data[i]; | |
248 | ||
249 | /* | |
250 | * Regulator API handles empty constraints but not NULL | |
251 | * constraints | |
252 | */ | |
253 | if (!reg_data) | |
254 | continue; | |
255 | ||
256 | /* Register the regulators */ | |
1922b0f2 AC |
257 | config.dev = tps->dev; |
258 | config.init_data = reg_data; | |
259 | config.driver_data = tps; | |
260 | config.regmap = tps->regmap; | |
261 | if (tps->dev->of_node) | |
262 | config.of_node = pdata->of_node[i]; | |
263 | ||
4aac198d SK |
264 | rdev = devm_regulator_register(&pdev->dev, ®ulators[i], |
265 | &config); | |
1922b0f2 AC |
266 | if (IS_ERR(rdev)) { |
267 | dev_err(tps->dev, "failed to register %s regulator\n", | |
268 | pdev->name); | |
4aac198d | 269 | return PTR_ERR(rdev); |
1922b0f2 AC |
270 | } |
271 | ||
272 | /* Save regulator for cleanup */ | |
273 | tps->rdev[i] = rdev; | |
274 | } | |
a493077f | 275 | return 0; |
a493077f AC |
276 | } |
277 | ||
278 | static struct platform_driver tps65217_regulator_driver = { | |
279 | .driver = { | |
280 | .name = "tps65217-pmic", | |
281 | }, | |
282 | .probe = tps65217_regulator_probe, | |
a493077f AC |
283 | }; |
284 | ||
285 | static int __init tps65217_regulator_init(void) | |
286 | { | |
287 | return platform_driver_register(&tps65217_regulator_driver); | |
288 | } | |
289 | subsys_initcall(tps65217_regulator_init); | |
290 | ||
291 | static void __exit tps65217_regulator_exit(void) | |
292 | { | |
293 | platform_driver_unregister(&tps65217_regulator_driver); | |
294 | } | |
295 | module_exit(tps65217_regulator_exit); | |
296 | ||
a493077f AC |
297 | MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); |
298 | MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); | |
299 | MODULE_ALIAS("platform:tps65217-pmic"); | |
300 | MODULE_LICENSE("GPL v2"); |