GNU Linux-libre 5.10.219-gnu1
[releases.git] / drivers / regulator / lp873x-regulator.c
1 /*
2  * Regulator driver for LP873X PMIC
3  *
4  * Copyright (C) 2016 Texas Instruments Incorporated - https://www.ti.com/
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  *
10  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
11  * kind, whether expressed or implied; without even the implied warranty
12  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License version 2 for more details.
14  */
15
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/regmap.h>
19
20 #include <linux/mfd/lp873x.h>
21
22 #define LP873X_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \
23                          _delay, _lr, _cr)                              \
24         [_id] = {                                                       \
25                 .desc = {                                               \
26                         .name                   = _name,                \
27                         .supply_name            = _of "-in",            \
28                         .id                     = _id,                  \
29                         .of_match               = of_match_ptr(_of),    \
30                         .regulators_node        = of_match_ptr("regulators"),\
31                         .ops                    = &_ops,                \
32                         .n_voltages             = _n,                   \
33                         .type                   = REGULATOR_VOLTAGE,    \
34                         .owner                  = THIS_MODULE,          \
35                         .vsel_reg               = _vr,                  \
36                         .vsel_mask              = _vm,                  \
37                         .enable_reg             = _er,                  \
38                         .enable_mask            = _em,                  \
39                         .ramp_delay             = _delay,               \
40                         .linear_ranges          = _lr,                  \
41                         .n_linear_ranges        = ARRAY_SIZE(_lr),      \
42                         .curr_table     = lp873x_buck_uA,               \
43                         .n_current_limits = ARRAY_SIZE(lp873x_buck_uA), \
44                         .csel_reg       = (_cr),                        \
45                         .csel_mask      = LP873X_BUCK0_CTRL_2_BUCK0_ILIM,\
46                 },                                                      \
47                 .ctrl2_reg = _cr,                                       \
48         }
49
50 struct lp873x_regulator {
51         struct regulator_desc desc;
52         unsigned int ctrl2_reg;
53 };
54
55 static const struct lp873x_regulator regulators[];
56
57 static const struct linear_range buck0_buck1_ranges[] = {
58         REGULATOR_LINEAR_RANGE(0, 0x0, 0x13, 0),
59         REGULATOR_LINEAR_RANGE(700000, 0x14, 0x17, 10000),
60         REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
61         REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
62 };
63
64 static const struct linear_range ldo0_ldo1_ranges[] = {
65         REGULATOR_LINEAR_RANGE(800000, 0x0, 0x19, 100000),
66 };
67
68 static const unsigned int lp873x_buck_ramp_delay[] = {
69         30000, 15000, 10000, 7500, 3800, 1900, 940, 470
70 };
71
72 /* LP873X BUCK current limit */
73 static const unsigned int lp873x_buck_uA[] = {
74         1500000, 2000000, 2500000, 3000000, 3500000, 4000000,
75 };
76
77 static int lp873x_buck_set_ramp_delay(struct regulator_dev *rdev,
78                                       int ramp_delay)
79 {
80         int id = rdev_get_id(rdev);
81         struct lp873x *lp873 = rdev_get_drvdata(rdev);
82         unsigned int reg;
83         int ret;
84
85         if (ramp_delay <= 470)
86                 reg = 7;
87         else if (ramp_delay <= 940)
88                 reg = 6;
89         else if (ramp_delay <= 1900)
90                 reg = 5;
91         else if (ramp_delay <= 3800)
92                 reg = 4;
93         else if (ramp_delay <= 7500)
94                 reg = 3;
95         else if (ramp_delay <= 10000)
96                 reg = 2;
97         else if (ramp_delay <= 15000)
98                 reg = 1;
99         else
100                 reg = 0;
101
102         ret = regmap_update_bits(lp873->regmap, regulators[id].ctrl2_reg,
103                                  LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE,
104                                  reg << __ffs(LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE));
105         if (ret) {
106                 dev_err(lp873->dev, "SLEW RATE write failed: %d\n", ret);
107                 return ret;
108         }
109
110         rdev->constraints->ramp_delay = lp873x_buck_ramp_delay[reg];
111
112         return 0;
113 }
114
115 /* Operations permitted on BUCK0, BUCK1 */
116 static const struct regulator_ops lp873x_buck01_ops = {
117         .is_enabled             = regulator_is_enabled_regmap,
118         .enable                 = regulator_enable_regmap,
119         .disable                = regulator_disable_regmap,
120         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
121         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
122         .list_voltage           = regulator_list_voltage_linear_range,
123         .map_voltage            = regulator_map_voltage_linear_range,
124         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
125         .set_ramp_delay         = lp873x_buck_set_ramp_delay,
126         .set_current_limit      = regulator_set_current_limit_regmap,
127         .get_current_limit      = regulator_get_current_limit_regmap,
128 };
129
130 /* Operations permitted on LDO0 and LDO1 */
131 static const struct regulator_ops lp873x_ldo01_ops = {
132         .is_enabled             = regulator_is_enabled_regmap,
133         .enable                 = regulator_enable_regmap,
134         .disable                = regulator_disable_regmap,
135         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
136         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
137         .list_voltage           = regulator_list_voltage_linear_range,
138         .map_voltage            = regulator_map_voltage_linear_range,
139 };
140
141 static const struct lp873x_regulator regulators[] = {
142         LP873X_REGULATOR("BUCK0", LP873X_BUCK_0, "buck0", lp873x_buck01_ops,
143                          256, LP873X_REG_BUCK0_VOUT,
144                          LP873X_BUCK0_VOUT_BUCK0_VSET, LP873X_REG_BUCK0_CTRL_1,
145                          LP873X_BUCK0_CTRL_1_BUCK0_EN, 10000,
146                          buck0_buck1_ranges, LP873X_REG_BUCK0_CTRL_2),
147         LP873X_REGULATOR("BUCK1", LP873X_BUCK_1, "buck1", lp873x_buck01_ops,
148                          256, LP873X_REG_BUCK1_VOUT,
149                          LP873X_BUCK1_VOUT_BUCK1_VSET, LP873X_REG_BUCK1_CTRL_1,
150                          LP873X_BUCK1_CTRL_1_BUCK1_EN, 10000,
151                          buck0_buck1_ranges, LP873X_REG_BUCK1_CTRL_2),
152         LP873X_REGULATOR("LDO0", LP873X_LDO_0, "ldo0", lp873x_ldo01_ops, 26,
153                          LP873X_REG_LDO0_VOUT, LP873X_LDO0_VOUT_LDO0_VSET,
154                          LP873X_REG_LDO0_CTRL,
155                          LP873X_LDO0_CTRL_LDO0_EN, 0, ldo0_ldo1_ranges, 0xFF),
156         LP873X_REGULATOR("LDO1", LP873X_LDO_1, "ldo1", lp873x_ldo01_ops, 26,
157                          LP873X_REG_LDO1_VOUT, LP873X_LDO1_VOUT_LDO1_VSET,
158                          LP873X_REG_LDO1_CTRL,
159                          LP873X_LDO1_CTRL_LDO1_EN, 0, ldo0_ldo1_ranges, 0xFF),
160 };
161
162 static int lp873x_regulator_probe(struct platform_device *pdev)
163 {
164         struct lp873x *lp873 = dev_get_drvdata(pdev->dev.parent);
165         struct regulator_config config = { };
166         struct regulator_dev *rdev;
167         int i;
168
169         platform_set_drvdata(pdev, lp873);
170
171         config.dev = &pdev->dev;
172         config.dev->of_node = lp873->dev->of_node;
173         config.driver_data = lp873;
174         config.regmap = lp873->regmap;
175
176         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
177                 rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
178                                                &config);
179                 if (IS_ERR(rdev)) {
180                         dev_err(lp873->dev, "failed to register %s regulator\n",
181                                 pdev->name);
182                         return PTR_ERR(rdev);
183                 }
184         }
185
186         return 0;
187 }
188
189 static const struct platform_device_id lp873x_regulator_id_table[] = {
190         { "lp873x-regulator", },
191         { /* sentinel */ }
192 };
193 MODULE_DEVICE_TABLE(platform, lp873x_regulator_id_table);
194
195 static struct platform_driver lp873x_regulator_driver = {
196         .driver = {
197                 .name = "lp873x-pmic",
198         },
199         .probe = lp873x_regulator_probe,
200         .id_table = lp873x_regulator_id_table,
201 };
202 module_platform_driver(lp873x_regulator_driver);
203
204 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
205 MODULE_DESCRIPTION("LP873X voltage regulator driver");
206 MODULE_ALIAS("platform:lp873x-pmic");
207 MODULE_LICENSE("GPL v2");