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(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 
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 
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 
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 
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 
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, &regulators[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 
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