1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Regulator driver for LP873X PMIC |
4 | * |
5 | * Copyright (C) 2016 Texas Instruments Incorporated - https://www.ti.com/ |
6 | */ |
7 | |
8 | #include <linux/bitfield.h> |
9 | #include <linux/module.h> |
10 | #include <linux/platform_device.h> |
11 | #include <linux/regmap.h> |
12 | |
13 | #include <linux/mfd/lp873x.h> |
14 | |
15 | #define LP873X_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \ |
16 | _delay, _lr, _cr) \ |
17 | [_id] = { \ |
18 | .desc = { \ |
19 | .name = _name, \ |
20 | .supply_name = _of "-in", \ |
21 | .id = _id, \ |
22 | .of_match = of_match_ptr(_of), \ |
23 | .regulators_node = of_match_ptr("regulators"),\ |
24 | .ops = &_ops, \ |
25 | .n_voltages = _n, \ |
26 | .type = REGULATOR_VOLTAGE, \ |
27 | .owner = THIS_MODULE, \ |
28 | .vsel_reg = _vr, \ |
29 | .vsel_mask = _vm, \ |
30 | .enable_reg = _er, \ |
31 | .enable_mask = _em, \ |
32 | .ramp_delay = _delay, \ |
33 | .linear_ranges = _lr, \ |
34 | .n_linear_ranges = ARRAY_SIZE(_lr), \ |
35 | .curr_table = lp873x_buck_uA, \ |
36 | .n_current_limits = ARRAY_SIZE(lp873x_buck_uA), \ |
37 | .csel_reg = (_cr), \ |
38 | .csel_mask = LP873X_BUCK0_CTRL_2_BUCK0_ILIM,\ |
39 | }, \ |
40 | .ctrl2_reg = _cr, \ |
41 | } |
42 | |
43 | struct lp873x_regulator { |
44 | struct regulator_desc desc; |
45 | unsigned int ctrl2_reg; |
46 | }; |
47 | |
48 | static const struct lp873x_regulator regulators[]; |
49 | |
50 | static const struct linear_range buck0_buck1_ranges[] = { |
51 | REGULATOR_LINEAR_RANGE(0, 0x0, 0x13, 0), |
52 | REGULATOR_LINEAR_RANGE(700000, 0x14, 0x17, 10000), |
53 | REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000), |
54 | REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000), |
55 | }; |
56 | |
57 | static const struct linear_range ldo0_ldo1_ranges[] = { |
58 | REGULATOR_LINEAR_RANGE(800000, 0x0, 0x19, 100000), |
59 | }; |
60 | |
61 | static const unsigned int lp873x_buck_ramp_delay[] = { |
62 | 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 |
63 | }; |
64 | |
65 | /* LP873X BUCK current limit */ |
66 | static const unsigned int lp873x_buck_uA[] = { |
67 | 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, |
68 | }; |
69 | |
70 | static int lp873x_buck_set_ramp_delay(struct regulator_dev *rdev, |
71 | int ramp_delay) |
72 | { |
73 | int id = rdev_get_id(rdev); |
74 | struct lp873x *lp873 = rdev_get_drvdata(rdev); |
75 | unsigned int reg; |
76 | int ret; |
77 | |
78 | if (ramp_delay <= 470) |
79 | reg = 7; |
80 | else if (ramp_delay <= 940) |
81 | reg = 6; |
82 | else if (ramp_delay <= 1900) |
83 | reg = 5; |
84 | else if (ramp_delay <= 3800) |
85 | reg = 4; |
86 | else if (ramp_delay <= 7500) |
87 | reg = 3; |
88 | else if (ramp_delay <= 10000) |
89 | reg = 2; |
90 | else if (ramp_delay <= 15000) |
91 | reg = 1; |
92 | else |
93 | reg = 0; |
94 | |
95 | ret = regmap_update_bits(map: lp873->regmap, reg: regulators[id].ctrl2_reg, |
96 | LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE, |
97 | FIELD_PREP(LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE, reg)); |
98 | if (ret) { |
99 | dev_err(lp873->dev, "SLEW RATE write failed: %d\n" , ret); |
100 | return ret; |
101 | } |
102 | |
103 | rdev->constraints->ramp_delay = lp873x_buck_ramp_delay[reg]; |
104 | |
105 | return 0; |
106 | } |
107 | |
108 | /* Operations permitted on BUCK0, BUCK1 */ |
109 | static const struct regulator_ops lp873x_buck01_ops = { |
110 | .is_enabled = regulator_is_enabled_regmap, |
111 | .enable = regulator_enable_regmap, |
112 | .disable = regulator_disable_regmap, |
113 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
114 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
115 | .list_voltage = regulator_list_voltage_linear_range, |
116 | .map_voltage = regulator_map_voltage_linear_range, |
117 | .set_voltage_time_sel = regulator_set_voltage_time_sel, |
118 | .set_ramp_delay = lp873x_buck_set_ramp_delay, |
119 | .set_current_limit = regulator_set_current_limit_regmap, |
120 | .get_current_limit = regulator_get_current_limit_regmap, |
121 | }; |
122 | |
123 | /* Operations permitted on LDO0 and LDO1 */ |
124 | static const struct regulator_ops lp873x_ldo01_ops = { |
125 | .is_enabled = regulator_is_enabled_regmap, |
126 | .enable = regulator_enable_regmap, |
127 | .disable = regulator_disable_regmap, |
128 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
129 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
130 | .list_voltage = regulator_list_voltage_linear_range, |
131 | .map_voltage = regulator_map_voltage_linear_range, |
132 | }; |
133 | |
134 | static const struct lp873x_regulator regulators[] = { |
135 | LP873X_REGULATOR("BUCK0" , LP873X_BUCK_0, "buck0" , lp873x_buck01_ops, |
136 | 256, LP873X_REG_BUCK0_VOUT, |
137 | LP873X_BUCK0_VOUT_BUCK0_VSET, LP873X_REG_BUCK0_CTRL_1, |
138 | LP873X_BUCK0_CTRL_1_BUCK0_EN, 10000, |
139 | buck0_buck1_ranges, LP873X_REG_BUCK0_CTRL_2), |
140 | LP873X_REGULATOR("BUCK1" , LP873X_BUCK_1, "buck1" , lp873x_buck01_ops, |
141 | 256, LP873X_REG_BUCK1_VOUT, |
142 | LP873X_BUCK1_VOUT_BUCK1_VSET, LP873X_REG_BUCK1_CTRL_1, |
143 | LP873X_BUCK1_CTRL_1_BUCK1_EN, 10000, |
144 | buck0_buck1_ranges, LP873X_REG_BUCK1_CTRL_2), |
145 | LP873X_REGULATOR("LDO0" , LP873X_LDO_0, "ldo0" , lp873x_ldo01_ops, 26, |
146 | LP873X_REG_LDO0_VOUT, LP873X_LDO0_VOUT_LDO0_VSET, |
147 | LP873X_REG_LDO0_CTRL, |
148 | LP873X_LDO0_CTRL_LDO0_EN, 0, ldo0_ldo1_ranges, 0xFF), |
149 | LP873X_REGULATOR("LDO1" , LP873X_LDO_1, "ldo1" , lp873x_ldo01_ops, 26, |
150 | LP873X_REG_LDO1_VOUT, LP873X_LDO1_VOUT_LDO1_VSET, |
151 | LP873X_REG_LDO1_CTRL, |
152 | LP873X_LDO1_CTRL_LDO1_EN, 0, ldo0_ldo1_ranges, 0xFF), |
153 | }; |
154 | |
155 | static int lp873x_regulator_probe(struct platform_device *pdev) |
156 | { |
157 | struct lp873x *lp873 = dev_get_drvdata(dev: pdev->dev.parent); |
158 | struct regulator_config config = { }; |
159 | struct regulator_dev *rdev; |
160 | int i; |
161 | |
162 | platform_set_drvdata(pdev, data: lp873); |
163 | |
164 | config.dev = &pdev->dev; |
165 | config.dev->of_node = lp873->dev->of_node; |
166 | config.driver_data = lp873; |
167 | config.regmap = lp873->regmap; |
168 | |
169 | for (i = 0; i < ARRAY_SIZE(regulators); i++) { |
170 | rdev = devm_regulator_register(dev: &pdev->dev, regulator_desc: ®ulators[i].desc, |
171 | config: &config); |
172 | if (IS_ERR(ptr: rdev)) { |
173 | dev_err(lp873->dev, "failed to register %s regulator\n" , |
174 | pdev->name); |
175 | return PTR_ERR(ptr: rdev); |
176 | } |
177 | } |
178 | |
179 | return 0; |
180 | } |
181 | |
182 | static const struct platform_device_id lp873x_regulator_id_table[] = { |
183 | { "lp873x-regulator" , }, |
184 | { /* sentinel */ } |
185 | }; |
186 | MODULE_DEVICE_TABLE(platform, lp873x_regulator_id_table); |
187 | |
188 | static struct platform_driver lp873x_regulator_driver = { |
189 | .driver = { |
190 | .name = "lp873x-pmic" , |
191 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
192 | }, |
193 | .probe = lp873x_regulator_probe, |
194 | .id_table = lp873x_regulator_id_table, |
195 | }; |
196 | module_platform_driver(lp873x_regulator_driver); |
197 | |
198 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>" ); |
199 | MODULE_DESCRIPTION("LP873X voltage regulator driver" ); |
200 | MODULE_ALIAS("platform:lp873x-pmic" ); |
201 | MODULE_LICENSE("GPL v2" ); |
202 | |