Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux...
[firefly-linux-kernel-4.4.55.git] / drivers / regulator / tps65217-regulator.c
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, _ops, _n, _vr, _vm, _em, _t, _lr, _nlr) \
31         {                                               \
32                 .name           = _name,                \
33                 .id             = _id,                  \
34                 .ops            = &_ops,                \
35                 .n_voltages     = _n,                   \
36                 .type           = REGULATOR_VOLTAGE,    \
37                 .owner          = THIS_MODULE,          \
38                 .vsel_reg       = _vr,                  \
39                 .vsel_mask      = _vm,                  \
40                 .enable_reg     = TPS65217_REG_ENABLE,  \
41                 .enable_mask    = _em,                  \
42                 .volt_table     = _t,                   \
43                 .linear_ranges  = _lr,                  \
44                 .n_linear_ranges = _nlr,                \
45         }                                               \
46
47 static const unsigned int LDO1_VSEL_table[] = {
48         1000000, 1100000, 1200000, 1250000,
49         1300000, 1350000, 1400000, 1500000,
50         1600000, 1800000, 2500000, 2750000,
51         2800000, 3000000, 3100000, 3300000,
52 };
53
54 static const struct regulator_linear_range tps65217_uv1_ranges[] = {
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),
60 };
61
62 static const struct regulator_linear_range tps65217_uv2_ranges[] = {
63         REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
64         REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
65         REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
66 };
67
68 static int tps65217_pmic_enable(struct regulator_dev *dev)
69 {
70         struct tps65217 *tps = rdev_get_drvdata(dev);
71         int rid = rdev_get_id(dev);
72
73         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
74                 return -EINVAL;
75
76         /* Enable the regulator and password protection is level 1 */
77         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
78                                  dev->desc->enable_mask, dev->desc->enable_mask,
79                                  TPS65217_PROTECT_L1);
80 }
81
82 static int tps65217_pmic_disable(struct regulator_dev *dev)
83 {
84         struct tps65217 *tps = rdev_get_drvdata(dev);
85         int rid = rdev_get_id(dev);
86
87         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
88                 return -EINVAL;
89
90         /* Disable the regulator and password protection is level 1 */
91         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
92                                    dev->desc->enable_mask, TPS65217_PROTECT_L1);
93 }
94
95 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
96                                          unsigned selector)
97 {
98         int ret;
99         struct tps65217 *tps = rdev_get_drvdata(dev);
100         unsigned int rid = rdev_get_id(dev);
101
102         /* Set the voltage based on vsel value and write protect level is 2 */
103         ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
104                                 selector, TPS65217_PROTECT_L2);
105
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         }
114
115         return ret;
116 }
117
118 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
119 static struct regulator_ops tps65217_pmic_ops = {
120         .is_enabled             = regulator_is_enabled_regmap,
121         .enable                 = tps65217_pmic_enable,
122         .disable                = tps65217_pmic_disable,
123         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
124         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
125         .list_voltage           = regulator_list_voltage_linear_range,
126         .map_voltage            = regulator_map_voltage_linear_range,
127 };
128
129 /* Operations permitted on LDO1 */
130 static struct regulator_ops tps65217_pmic_ldo1_ops = {
131         .is_enabled             = regulator_is_enabled_regmap,
132         .enable                 = tps65217_pmic_enable,
133         .disable                = tps65217_pmic_disable,
134         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
135         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
136         .list_voltage           = regulator_list_voltage_table,
137         .map_voltage            = regulator_map_voltage_ascend,
138 };
139
140 static const struct regulator_desc regulators[] = {
141         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64,
142                            TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK,
143                            TPS65217_ENABLE_DC1_EN, NULL, tps65217_uv1_ranges,
144                            2),  /* DCDC1 voltage range: 900000 ~ 1800000 */
145         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64,
146                            TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK,
147                            TPS65217_ENABLE_DC2_EN, NULL, tps65217_uv1_ranges,
148                            ARRAY_SIZE(tps65217_uv1_ranges)),
149         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64,
150                            TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK,
151                            TPS65217_ENABLE_DC3_EN, NULL, tps65217_uv1_ranges,
152                            1),  /* DCDC3 voltage range: 900000 ~ 1500000 */
153         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16,
154                            TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK,
155                            TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table, NULL, 0),
156         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64,
157                            TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK,
158                            TPS65217_ENABLE_LDO2_EN, NULL, tps65217_uv1_ranges,
159                            ARRAY_SIZE(tps65217_uv1_ranges)),
160         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32,
161                            TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
162                            TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
163                            NULL, tps65217_uv2_ranges,
164                            ARRAY_SIZE(tps65217_uv2_ranges)),
165         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32,
166                            TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
167                            TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
168                            NULL, tps65217_uv2_ranges,
169                            ARRAY_SIZE(tps65217_uv2_ranges)),
170 };
171
172 #ifdef CONFIG_OF
173 static struct of_regulator_match reg_matches[] = {
174         { .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 },
175         { .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 },
176         { .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 },
177         { .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 },
178         { .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 },
179         { .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 },
180         { .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 },
181 };
182
183 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
184 {
185         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
186         struct device_node *node = tps->dev->of_node;
187         struct tps65217_board *pdata;
188         struct device_node *regs;
189         int i, count;
190
191         regs = of_get_child_by_name(node, "regulators");
192         if (!regs)
193                 return NULL;
194
195         count = of_regulator_match(&pdev->dev, regs, reg_matches,
196                                    TPS65217_NUM_REGULATOR);
197         of_node_put(regs);
198         if ((count < 0) || (count > TPS65217_NUM_REGULATOR))
199                 return NULL;
200
201         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
202         if (!pdata)
203                 return NULL;
204
205         for (i = 0; i < count; i++) {
206                 if (!reg_matches[i].of_node)
207                         continue;
208
209                 pdata->tps65217_init_data[i] = reg_matches[i].init_data;
210                 pdata->of_node[i] = reg_matches[i].of_node;
211         }
212
213         return pdata;
214 }
215 #else
216 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
217 {
218         return NULL;
219 }
220 #endif
221
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;
229
230         if (tps->dev->of_node)
231                 pdata = tps65217_parse_dt(pdev);
232
233         if (!pdata) {
234                 dev_err(&pdev->dev, "Platform data not found\n");
235                 return -EINVAL;
236         }
237
238         if (tps65217_chip_id(tps) != TPS65217) {
239                 dev_err(&pdev->dev, "Invalid tps chip version\n");
240                 return -ENODEV;
241         }
242
243         platform_set_drvdata(pdev, tps);
244
245         for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
246                 /* Register the regulators */
247                 config.dev = tps->dev;
248                 config.init_data = pdata->tps65217_init_data[i];
249                 config.driver_data = tps;
250                 config.regmap = tps->regmap;
251                 if (tps->dev->of_node)
252                         config.of_node = pdata->of_node[i];
253
254                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
255                                                &config);
256                 if (IS_ERR(rdev)) {
257                         dev_err(tps->dev, "failed to register %s regulator\n",
258                                 pdev->name);
259                         return PTR_ERR(rdev);
260                 }
261         }
262         return 0;
263 }
264
265 static struct platform_driver tps65217_regulator_driver = {
266         .driver = {
267                 .name = "tps65217-pmic",
268         },
269         .probe = tps65217_regulator_probe,
270 };
271
272 static int __init tps65217_regulator_init(void)
273 {
274         return platform_driver_register(&tps65217_regulator_driver);
275 }
276 subsys_initcall(tps65217_regulator_init);
277
278 static void __exit tps65217_regulator_exit(void)
279 {
280         platform_driver_unregister(&tps65217_regulator_driver);
281 }
282 module_exit(tps65217_regulator_exit);
283
284 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
285 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
286 MODULE_ALIAS("platform:tps65217-pmic");
287 MODULE_LICENSE("GPL v2");