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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 }, \
43 .ctrl2_reg = _cr, \
44 }
45
46struct lp873x_regulator {
47 struct regulator_desc desc;
48 unsigned int ctrl2_reg;
49};
50
51static const struct lp873x_regulator regulators[];
52
53static const struct regulator_linear_range buck0_buck1_ranges[] = {
54 REGULATOR_LINEAR_RANGE(0, 0x0, 0x13, 0),
55 REGULATOR_LINEAR_RANGE(700000, 0x14, 0x17, 10000),
56 REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
57 REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
58};
59
60static const struct regulator_linear_range ldo0_ldo1_ranges[] = {
61 REGULATOR_LINEAR_RANGE(800000, 0x0, 0x19, 100000),
62};
63
64static unsigned int lp873x_buck_ramp_delay[] = {
65 30000, 15000, 10000, 7500, 3800, 1900, 940, 470
66};
67
68
69static const unsigned int lp873x_buck_uA[] = {
70 1500000, 2000000, 2500000, 3000000, 3500000, 4000000,
71};
72
73static int lp873x_buck_set_ramp_delay(struct regulator_dev *rdev,
74 int ramp_delay)
75{
76 int id = rdev_get_id(rdev);
77 struct lp873x *lp873 = rdev_get_drvdata(rdev);
78 unsigned int reg;
79 int ret;
80
81 if (ramp_delay <= 470)
82 reg = 7;
83 else if (ramp_delay <= 940)
84 reg = 6;
85 else if (ramp_delay <= 1900)
86 reg = 5;
87 else if (ramp_delay <= 3800)
88 reg = 4;
89 else if (ramp_delay <= 7500)
90 reg = 3;
91 else if (ramp_delay <= 10000)
92 reg = 2;
93 else if (ramp_delay <= 15000)
94 reg = 1;
95 else
96 reg = 0;
97
98 ret = regmap_update_bits(lp873->regmap, regulators[id].ctrl2_reg,
99 LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE,
100 reg << __ffs(LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE));
101 if (ret) {
102 dev_err(lp873->dev, "SLEW RATE write failed: %d\n", ret);
103 return ret;
104 }
105
106 rdev->constraints->ramp_delay = lp873x_buck_ramp_delay[reg];
107
108 return 0;
109}
110
111static int lp873x_buck_set_current_limit(struct regulator_dev *rdev,
112 int min_uA, int max_uA)
113{
114 int id = rdev_get_id(rdev);
115 struct lp873x *lp873 = rdev_get_drvdata(rdev);
116 int i;
117
118 for (i = ARRAY_SIZE(lp873x_buck_uA) - 1; i >= 0; i--) {
119 if (lp873x_buck_uA[i] >= min_uA &&
120 lp873x_buck_uA[i] <= max_uA)
121 return regmap_update_bits(lp873->regmap,
122 regulators[id].ctrl2_reg,
123 LP873X_BUCK0_CTRL_2_BUCK0_ILIM,
124 i << __ffs(LP873X_BUCK0_CTRL_2_BUCK0_ILIM));
125 }
126
127 return -EINVAL;
128}
129
130static int lp873x_buck_get_current_limit(struct regulator_dev *rdev)
131{
132 int id = rdev_get_id(rdev);
133 struct lp873x *lp873 = rdev_get_drvdata(rdev);
134 int ret;
135 unsigned int val;
136
137 ret = regmap_read(lp873->regmap, regulators[id].ctrl2_reg, &val);
138 if (ret)
139 return ret;
140
141 val = (val & LP873X_BUCK0_CTRL_2_BUCK0_ILIM) >>
142 __ffs(LP873X_BUCK0_CTRL_2_BUCK0_ILIM);
143
144 return (val < ARRAY_SIZE(lp873x_buck_uA)) ?
145 lp873x_buck_uA[val] : -EINVAL;
146}
147
148
149static struct regulator_ops lp873x_buck01_ops = {
150 .is_enabled = regulator_is_enabled_regmap,
151 .enable = regulator_enable_regmap,
152 .disable = regulator_disable_regmap,
153 .get_voltage_sel = regulator_get_voltage_sel_regmap,
154 .set_voltage_sel = regulator_set_voltage_sel_regmap,
155 .list_voltage = regulator_list_voltage_linear_range,
156 .map_voltage = regulator_map_voltage_linear_range,
157 .set_voltage_time_sel = regulator_set_voltage_time_sel,
158 .set_ramp_delay = lp873x_buck_set_ramp_delay,
159 .set_current_limit = lp873x_buck_set_current_limit,
160 .get_current_limit = lp873x_buck_get_current_limit,
161};
162
163
164static struct regulator_ops lp873x_ldo01_ops = {
165 .is_enabled = regulator_is_enabled_regmap,
166 .enable = regulator_enable_regmap,
167 .disable = regulator_disable_regmap,
168 .get_voltage_sel = regulator_get_voltage_sel_regmap,
169 .set_voltage_sel = regulator_set_voltage_sel_regmap,
170 .list_voltage = regulator_list_voltage_linear_range,
171 .map_voltage = regulator_map_voltage_linear_range,
172};
173
174static const struct lp873x_regulator regulators[] = {
175 LP873X_REGULATOR("BUCK0", LP873X_BUCK_0, "buck0", lp873x_buck01_ops,
176 256, LP873X_REG_BUCK0_VOUT,
177 LP873X_BUCK0_VOUT_BUCK0_VSET, LP873X_REG_BUCK0_CTRL_1,
178 LP873X_BUCK0_CTRL_1_BUCK0_EN, 10000,
179 buck0_buck1_ranges, LP873X_REG_BUCK0_CTRL_2),
180 LP873X_REGULATOR("BUCK1", LP873X_BUCK_1, "buck1", lp873x_buck01_ops,
181 256, LP873X_REG_BUCK1_VOUT,
182 LP873X_BUCK1_VOUT_BUCK1_VSET, LP873X_REG_BUCK1_CTRL_1,
183 LP873X_BUCK1_CTRL_1_BUCK1_EN, 10000,
184 buck0_buck1_ranges, LP873X_REG_BUCK1_CTRL_2),
185 LP873X_REGULATOR("LDO0", LP873X_LDO_0, "ldo0", lp873x_ldo01_ops, 26,
186 LP873X_REG_LDO0_VOUT, LP873X_LDO0_VOUT_LDO0_VSET,
187 LP873X_REG_LDO0_CTRL,
188 LP873X_LDO0_CTRL_LDO0_EN, 0, ldo0_ldo1_ranges, 0xFF),
189 LP873X_REGULATOR("LDO1", LP873X_LDO_1, "ldo1", lp873x_ldo01_ops, 26,
190 LP873X_REG_LDO1_VOUT, LP873X_LDO1_VOUT_LDO1_VSET,
191 LP873X_REG_LDO1_CTRL,
192 LP873X_LDO1_CTRL_LDO1_EN, 0, ldo0_ldo1_ranges, 0xFF),
193};
194
195static int lp873x_regulator_probe(struct platform_device *pdev)
196{
197 struct lp873x *lp873 = dev_get_drvdata(pdev->dev.parent);
198 struct regulator_config config = { };
199 struct regulator_dev *rdev;
200 int i;
201
202 platform_set_drvdata(pdev, lp873);
203
204 config.dev = &pdev->dev;
205 config.dev->of_node = lp873->dev->of_node;
206 config.driver_data = lp873;
207 config.regmap = lp873->regmap;
208
209 for (i = 0; i < ARRAY_SIZE(regulators); i++) {
210 rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc,
211 &config);
212 if (IS_ERR(rdev)) {
213 dev_err(lp873->dev, "failed to register %s regulator\n",
214 pdev->name);
215 return PTR_ERR(rdev);
216 }
217 }
218
219 return 0;
220}
221
222static const struct platform_device_id lp873x_regulator_id_table[] = {
223 { "lp873x-regulator", },
224 { }
225};
226MODULE_DEVICE_TABLE(platform, lp873x_regulator_id_table);
227
228static struct platform_driver lp873x_regulator_driver = {
229 .driver = {
230 .name = "lp873x-pmic",
231 },
232 .probe = lp873x_regulator_probe,
233 .id_table = lp873x_regulator_id_table,
234};
235module_platform_driver(lp873x_regulator_driver);
236
237MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
238MODULE_DESCRIPTION("LP873X voltage regulator driver");
239MODULE_ALIAS("platform:lp873x-pmic");
240MODULE_LICENSE("GPL v2");
241
