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 | |
64 | static int tps65217_pmic_enable(struct regulator_dev *dev) |
65 | { |
66 | struct tps65217 *tps = rdev_get_drvdata(rdev: dev); |
67 | int rid = rdev_get_id(rdev: 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 | mask: dev->desc->enable_mask, val: dev->desc->enable_mask, |
75 | TPS65217_PROTECT_L1); |
76 | } |
77 | |
78 | static int tps65217_pmic_disable(struct regulator_dev *dev) |
79 | { |
80 | struct tps65217 *tps = rdev_get_drvdata(rdev: dev); |
81 | int rid = rdev_get_id(rdev: 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 | mask: dev->desc->enable_mask, TPS65217_PROTECT_L1); |
89 | } |
90 | |
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(rdev: dev); |
96 | unsigned int rid = rdev_get_id(rdev: dev); |
97 | |
98 | /* Set the voltage based on vsel value and write protect level is 2 */ |
99 | ret = tps65217_set_bits(tps, reg: dev->desc->vsel_reg, mask: dev->desc->vsel_mask, |
100 | val: 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 | |
114 | static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev) |
115 | { |
116 | struct tps65217 *tps = rdev_get_drvdata(rdev: dev); |
117 | unsigned int rid = rdev_get_id(rdev: dev); |
118 | |
119 | if (rid > TPS65217_LDO_4) |
120 | return -EINVAL; |
121 | |
122 | return tps65217_clear_bits(tps, reg: dev->desc->bypass_reg, |
123 | mask: dev->desc->bypass_mask, |
124 | TPS65217_PROTECT_L1); |
125 | } |
126 | |
127 | static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev) |
128 | { |
129 | struct tps65217 *tps = rdev_get_drvdata(rdev: dev); |
130 | unsigned int rid = rdev_get_id(rdev: 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, reg: dev->desc->bypass_reg, |
139 | mask: dev->desc->bypass_mask, |
140 | val: 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 | |
213 | static int tps65217_regulator_probe(struct platform_device *pdev) |
214 | { |
215 | struct tps65217 *tps = dev_get_drvdata(dev: pdev->dev.parent); |
216 | struct tps65217_board *pdata = dev_get_platdata(dev: 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(dev: &pdev->dev, |
224 | TPS65217_NUM_REGULATOR, size: sizeof(u8), |
225 | GFP_KERNEL); |
226 | if (!tps->strobes) |
227 | return -ENOMEM; |
228 | |
229 | platform_set_drvdata(pdev, data: 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(dev: &pdev->dev, regulator_desc: ®ulators[i], |
240 | config: &config); |
241 | if (IS_ERR(ptr: rdev)) { |
242 | dev_err(tps->dev, "failed to register %s regulator\n" , |
243 | pdev->name); |
244 | return PTR_ERR(ptr: rdev); |
245 | } |
246 | |
247 | /* Store default strobe info */ |
248 | ret = tps65217_reg_read(tps, reg: regulators[i].bypass_reg, val: &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 | |
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 | |
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 | |