1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // mp5416.c - regulator driver for mps mp5416 |
4 | // |
5 | // Copyright 2020 Monolithic Power Systems, Inc |
6 | // |
7 | // Author: Saravanan Sekar <sravanhome@gmail.com> |
8 | |
9 | #include <linux/err.h> |
10 | #include <linux/i2c.h> |
11 | #include <linux/init.h> |
12 | #include <linux/module.h> |
13 | #include <linux/of.h> |
14 | #include <linux/platform_device.h> |
15 | #include <linux/regmap.h> |
16 | #include <linux/regulator/driver.h> |
17 | |
18 | #define MP5416_REG_CTL0 0x00 |
19 | #define MP5416_REG_CTL1 0x01 |
20 | #define MP5416_REG_CTL2 0x02 |
21 | #define MP5416_REG_ILIM 0x03 |
22 | #define MP5416_REG_BUCK1 0x04 |
23 | #define MP5416_REG_BUCK2 0x05 |
24 | #define MP5416_REG_BUCK3 0x06 |
25 | #define MP5416_REG_BUCK4 0x07 |
26 | #define MP5416_REG_LDO1 0x08 |
27 | #define MP5416_REG_LDO2 0x09 |
28 | #define MP5416_REG_LDO3 0x0a |
29 | #define MP5416_REG_LDO4 0x0b |
30 | |
31 | #define MP5416_REGULATOR_EN BIT(7) |
32 | #define MP5416_MASK_VSET 0x7f |
33 | #define MP5416_MASK_BUCK1_ILIM 0xc0 |
34 | #define MP5416_MASK_BUCK2_ILIM 0x0c |
35 | #define MP5416_MASK_BUCK3_ILIM 0x30 |
36 | #define MP5416_MASK_BUCK4_ILIM 0x03 |
37 | #define MP5416_MASK_DVS_SLEWRATE 0xc0 |
38 | |
39 | /* values in uV */ |
40 | #define MP5416_VOLT1_MIN 600000 |
41 | #define MP5416_VOLT1_MAX 2187500 |
42 | #define MP5416_VOLT1_STEP 12500 |
43 | #define MP5416_VOLT2_MIN 800000 |
44 | #define MP5416_VOLT2_MAX 3975000 |
45 | #define MP5416_VOLT2_STEP 25000 |
46 | |
47 | #define MP5416_VOLT1_RANGE \ |
48 | ((MP5416_VOLT1_MAX - MP5416_VOLT1_MIN)/MP5416_VOLT1_STEP + 1) |
49 | #define MP5416_VOLT2_RANGE \ |
50 | ((MP5416_VOLT2_MAX - MP5416_VOLT2_MIN)/MP5416_VOLT2_STEP + 1) |
51 | |
52 | #define MP5416BUCK(_name, _id, _ilim, _dreg, _dval, _vsel) \ |
53 | [MP5416_BUCK ## _id] = { \ |
54 | .id = MP5416_BUCK ## _id, \ |
55 | .name = _name, \ |
56 | .of_match = _name, \ |
57 | .regulators_node = "regulators", \ |
58 | .ops = &mp5416_buck_ops, \ |
59 | .min_uV = MP5416_VOLT ##_vsel## _MIN, \ |
60 | .uV_step = MP5416_VOLT ##_vsel## _STEP, \ |
61 | .n_voltages = MP5416_VOLT ##_vsel## _RANGE, \ |
62 | .curr_table = _ilim, \ |
63 | .n_current_limits = ARRAY_SIZE(_ilim), \ |
64 | .csel_reg = MP5416_REG_ILIM, \ |
65 | .csel_mask = MP5416_MASK_BUCK ## _id ##_ILIM, \ |
66 | .vsel_reg = MP5416_REG_BUCK ## _id, \ |
67 | .vsel_mask = MP5416_MASK_VSET, \ |
68 | .enable_reg = MP5416_REG_BUCK ## _id, \ |
69 | .enable_mask = MP5416_REGULATOR_EN, \ |
70 | .ramp_reg = MP5416_REG_CTL2, \ |
71 | .ramp_mask = MP5416_MASK_DVS_SLEWRATE, \ |
72 | .ramp_delay_table = mp5416_buck_ramp_table, \ |
73 | .n_ramp_values = ARRAY_SIZE(mp5416_buck_ramp_table), \ |
74 | .active_discharge_on = _dval, \ |
75 | .active_discharge_reg = _dreg, \ |
76 | .active_discharge_mask = _dval, \ |
77 | .owner = THIS_MODULE, \ |
78 | } |
79 | |
80 | #define MP5416LDO(_name, _id, _dval) \ |
81 | [MP5416_LDO ## _id] = { \ |
82 | .id = MP5416_LDO ## _id, \ |
83 | .name = _name, \ |
84 | .of_match = _name, \ |
85 | .regulators_node = "regulators", \ |
86 | .ops = &mp5416_ldo_ops, \ |
87 | .min_uV = MP5416_VOLT2_MIN, \ |
88 | .uV_step = MP5416_VOLT2_STEP, \ |
89 | .n_voltages = MP5416_VOLT2_RANGE, \ |
90 | .vsel_reg = MP5416_REG_LDO ##_id, \ |
91 | .vsel_mask = MP5416_MASK_VSET, \ |
92 | .enable_reg = MP5416_REG_LDO ##_id, \ |
93 | .enable_mask = MP5416_REGULATOR_EN, \ |
94 | .active_discharge_on = _dval, \ |
95 | .active_discharge_reg = MP5416_REG_CTL2, \ |
96 | .active_discharge_mask = _dval, \ |
97 | .owner = THIS_MODULE, \ |
98 | } |
99 | |
100 | enum mp5416_regulators { |
101 | MP5416_BUCK1, |
102 | MP5416_BUCK2, |
103 | MP5416_BUCK3, |
104 | MP5416_BUCK4, |
105 | MP5416_LDO1, |
106 | MP5416_LDO2, |
107 | MP5416_LDO3, |
108 | MP5416_LDO4, |
109 | MP5416_MAX_REGULATORS, |
110 | }; |
111 | |
112 | static const struct regmap_config mp5416_regmap_config = { |
113 | .reg_bits = 8, |
114 | .val_bits = 8, |
115 | .max_register = 0x0d, |
116 | }; |
117 | |
118 | /* Current limits array (in uA) |
119 | * ILIM1 & ILIM3 |
120 | */ |
121 | static const unsigned int mp5416_I_limits1[] = { |
122 | 3800000, 4600000, 5600000, 6800000 |
123 | }; |
124 | |
125 | /* ILIM2 & ILIM4 */ |
126 | static const unsigned int mp5416_I_limits2[] = { |
127 | 2200000, 3200000, 4200000, 5200000 |
128 | }; |
129 | |
130 | /* |
131 | * DVS ramp rate BUCK1 to BUCK4 |
132 | * 00: 32mV/us |
133 | * 01: 16mV/us |
134 | * 10: 8mV/us |
135 | * 11: 4mV/us |
136 | */ |
137 | static const unsigned int mp5416_buck_ramp_table[] = { |
138 | 32000, 16000, 8000, 4000 |
139 | }; |
140 | |
141 | static const struct regulator_ops mp5416_ldo_ops = { |
142 | .enable = regulator_enable_regmap, |
143 | .disable = regulator_disable_regmap, |
144 | .is_enabled = regulator_is_enabled_regmap, |
145 | .list_voltage = regulator_list_voltage_linear, |
146 | .map_voltage = regulator_map_voltage_linear, |
147 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
148 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
149 | .set_active_discharge = regulator_set_active_discharge_regmap, |
150 | }; |
151 | |
152 | static const struct regulator_ops mp5416_buck_ops = { |
153 | .enable = regulator_enable_regmap, |
154 | .disable = regulator_disable_regmap, |
155 | .is_enabled = regulator_is_enabled_regmap, |
156 | .list_voltage = regulator_list_voltage_linear, |
157 | .map_voltage = regulator_map_voltage_linear, |
158 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
159 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
160 | .set_active_discharge = regulator_set_active_discharge_regmap, |
161 | .get_current_limit = regulator_get_current_limit_regmap, |
162 | .set_current_limit = regulator_set_current_limit_regmap, |
163 | .set_ramp_delay = regulator_set_ramp_delay_regmap, |
164 | }; |
165 | |
166 | static struct regulator_desc mp5416_regulators_desc[MP5416_MAX_REGULATORS] = { |
167 | MP5416BUCK("buck1" , 1, mp5416_I_limits1, MP5416_REG_CTL1, BIT(0), 1), |
168 | MP5416BUCK("buck2" , 2, mp5416_I_limits2, MP5416_REG_CTL1, BIT(1), 2), |
169 | MP5416BUCK("buck3" , 3, mp5416_I_limits1, MP5416_REG_CTL1, BIT(2), 1), |
170 | MP5416BUCK("buck4" , 4, mp5416_I_limits2, MP5416_REG_CTL2, BIT(5), 2), |
171 | MP5416LDO("ldo1" , 1, BIT(4)), |
172 | MP5416LDO("ldo2" , 2, BIT(3)), |
173 | MP5416LDO("ldo3" , 3, BIT(2)), |
174 | MP5416LDO("ldo4" , 4, BIT(1)), |
175 | }; |
176 | |
177 | static struct regulator_desc mp5496_regulators_desc[MP5416_MAX_REGULATORS] = { |
178 | MP5416BUCK("buck1" , 1, mp5416_I_limits1, MP5416_REG_CTL1, BIT(0), 1), |
179 | MP5416BUCK("buck2" , 2, mp5416_I_limits2, MP5416_REG_CTL1, BIT(1), 1), |
180 | MP5416BUCK("buck3" , 3, mp5416_I_limits1, MP5416_REG_CTL1, BIT(2), 1), |
181 | MP5416BUCK("buck4" , 4, mp5416_I_limits2, MP5416_REG_CTL2, BIT(5), 1), |
182 | MP5416LDO("ldo1" , 1, BIT(4)), |
183 | MP5416LDO("ldo2" , 2, BIT(3)), |
184 | MP5416LDO("ldo3" , 3, BIT(2)), |
185 | MP5416LDO("ldo4" , 4, BIT(1)), |
186 | }; |
187 | |
188 | static int mp5416_i2c_probe(struct i2c_client *client) |
189 | { |
190 | struct device *dev = &client->dev; |
191 | struct regulator_config config = { NULL, }; |
192 | static const struct regulator_desc *desc; |
193 | struct regulator_dev *rdev; |
194 | struct regmap *regmap; |
195 | int i; |
196 | |
197 | regmap = devm_regmap_init_i2c(client, &mp5416_regmap_config); |
198 | if (IS_ERR(ptr: regmap)) { |
199 | dev_err(dev, "Failed to allocate regmap!\n" ); |
200 | return PTR_ERR(ptr: regmap); |
201 | } |
202 | |
203 | desc = i2c_get_match_data(client); |
204 | if (!desc) |
205 | return -ENODEV; |
206 | |
207 | config.dev = dev; |
208 | config.regmap = regmap; |
209 | |
210 | for (i = 0; i < MP5416_MAX_REGULATORS; i++) { |
211 | rdev = devm_regulator_register(dev, |
212 | regulator_desc: &desc[i], |
213 | config: &config); |
214 | if (IS_ERR(ptr: rdev)) { |
215 | dev_err(dev, "Failed to register regulator!\n" ); |
216 | return PTR_ERR(ptr: rdev); |
217 | } |
218 | } |
219 | |
220 | return 0; |
221 | } |
222 | |
223 | static const struct of_device_id mp5416_of_match[] = { |
224 | { .compatible = "mps,mp5416" , .data = &mp5416_regulators_desc }, |
225 | { .compatible = "mps,mp5496" , .data = &mp5496_regulators_desc }, |
226 | {} |
227 | }; |
228 | MODULE_DEVICE_TABLE(of, mp5416_of_match); |
229 | |
230 | static const struct i2c_device_id mp5416_id[] = { |
231 | { "mp5416" , (kernel_ulong_t)&mp5416_regulators_desc }, |
232 | { "mp5496" , (kernel_ulong_t)&mp5496_regulators_desc }, |
233 | {} |
234 | }; |
235 | MODULE_DEVICE_TABLE(i2c, mp5416_id); |
236 | |
237 | static struct i2c_driver mp5416_regulator_driver = { |
238 | .driver = { |
239 | .name = "mp5416" , |
240 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
241 | .of_match_table = of_match_ptr(mp5416_of_match), |
242 | }, |
243 | .probe = mp5416_i2c_probe, |
244 | .id_table = mp5416_id, |
245 | }; |
246 | module_i2c_driver(mp5416_regulator_driver); |
247 | |
248 | MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>" ); |
249 | MODULE_DESCRIPTION("MP5416 PMIC regulator driver" ); |
250 | MODULE_LICENSE("GPL" ); |
251 | |