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dfe7a1b0 CC |
1 | /* |
2 | * AXP20x regulators driver. | |
3 | * | |
4 | * Copyright (C) 2013 Carlo Caione <carlo@caione.org> | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General | |
7 | * Public License. See the file "COPYING" in the main directory of this | |
8 | * archive for more details. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | */ | |
15 | ||
16 | #include <linux/err.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/of.h> | |
20 | #include <linux/of_device.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/regmap.h> | |
23 | #include <linux/mfd/axp20x.h> | |
24 | #include <linux/regulator/driver.h> | |
25 | #include <linux/regulator/of_regulator.h> | |
26 | ||
27 | #define AXP20X_IO_ENABLED 0x03 | |
28 | #define AXP20X_IO_DISABLED 0x07 | |
29 | ||
30 | #define AXP20X_WORKMODE_DCDC2_MASK BIT(2) | |
31 | #define AXP20X_WORKMODE_DCDC3_MASK BIT(1) | |
32 | ||
33 | #define AXP20X_FREQ_DCDC_MASK 0x0f | |
34 | ||
880fe82d CYT |
35 | #define AXP20X_DESC_IO(_id, _match, _supply, _min, _max, _step, _vreg, _vmask, \ |
36 | _ereg, _emask, _enable_val, _disable_val) \ | |
dfe7a1b0 CC |
37 | [AXP20X_##_id] = { \ |
38 | .name = #_id, \ | |
39 | .supply_name = (_supply), \ | |
880fe82d CYT |
40 | .of_match = of_match_ptr(_match), \ |
41 | .regulators_node = of_match_ptr("regulators"), \ | |
dfe7a1b0 CC |
42 | .type = REGULATOR_VOLTAGE, \ |
43 | .id = AXP20X_##_id, \ | |
44 | .n_voltages = (((_max) - (_min)) / (_step) + 1), \ | |
45 | .owner = THIS_MODULE, \ | |
46 | .min_uV = (_min) * 1000, \ | |
47 | .uV_step = (_step) * 1000, \ | |
48 | .vsel_reg = (_vreg), \ | |
49 | .vsel_mask = (_vmask), \ | |
50 | .enable_reg = (_ereg), \ | |
51 | .enable_mask = (_emask), \ | |
52 | .enable_val = (_enable_val), \ | |
53 | .disable_val = (_disable_val), \ | |
54 | .ops = &axp20x_ops, \ | |
55 | } | |
56 | ||
880fe82d CYT |
57 | #define AXP20X_DESC(_id, _match, _supply, _min, _max, _step, _vreg, _vmask, \ |
58 | _ereg, _emask) \ | |
dfe7a1b0 CC |
59 | [AXP20X_##_id] = { \ |
60 | .name = #_id, \ | |
61 | .supply_name = (_supply), \ | |
880fe82d CYT |
62 | .of_match = of_match_ptr(_match), \ |
63 | .regulators_node = of_match_ptr("regulators"), \ | |
dfe7a1b0 CC |
64 | .type = REGULATOR_VOLTAGE, \ |
65 | .id = AXP20X_##_id, \ | |
66 | .n_voltages = (((_max) - (_min)) / (_step) + 1), \ | |
67 | .owner = THIS_MODULE, \ | |
68 | .min_uV = (_min) * 1000, \ | |
69 | .uV_step = (_step) * 1000, \ | |
70 | .vsel_reg = (_vreg), \ | |
71 | .vsel_mask = (_vmask), \ | |
72 | .enable_reg = (_ereg), \ | |
73 | .enable_mask = (_emask), \ | |
74 | .ops = &axp20x_ops, \ | |
75 | } | |
76 | ||
880fe82d | 77 | #define AXP20X_DESC_FIXED(_id, _match, _supply, _volt) \ |
dfe7a1b0 CC |
78 | [AXP20X_##_id] = { \ |
79 | .name = #_id, \ | |
80 | .supply_name = (_supply), \ | |
880fe82d CYT |
81 | .of_match = of_match_ptr(_match), \ |
82 | .regulators_node = of_match_ptr("regulators"), \ | |
dfe7a1b0 CC |
83 | .type = REGULATOR_VOLTAGE, \ |
84 | .id = AXP20X_##_id, \ | |
85 | .n_voltages = 1, \ | |
86 | .owner = THIS_MODULE, \ | |
87 | .min_uV = (_volt) * 1000, \ | |
88 | .ops = &axp20x_ops_fixed \ | |
89 | } | |
90 | ||
880fe82d CYT |
91 | #define AXP20X_DESC_TABLE(_id, _match, _supply, _table, _vreg, _vmask, _ereg, \ |
92 | _emask) \ | |
dfe7a1b0 CC |
93 | [AXP20X_##_id] = { \ |
94 | .name = #_id, \ | |
95 | .supply_name = (_supply), \ | |
880fe82d CYT |
96 | .of_match = of_match_ptr(_match), \ |
97 | .regulators_node = of_match_ptr("regulators"), \ | |
dfe7a1b0 CC |
98 | .type = REGULATOR_VOLTAGE, \ |
99 | .id = AXP20X_##_id, \ | |
100 | .n_voltages = ARRAY_SIZE(_table), \ | |
101 | .owner = THIS_MODULE, \ | |
102 | .vsel_reg = (_vreg), \ | |
103 | .vsel_mask = (_vmask), \ | |
104 | .enable_reg = (_ereg), \ | |
105 | .enable_mask = (_emask), \ | |
106 | .volt_table = (_table), \ | |
107 | .ops = &axp20x_ops_table, \ | |
108 | } | |
109 | ||
110 | static const int axp20x_ldo4_data[] = { 1250000, 1300000, 1400000, 1500000, 1600000, | |
111 | 1700000, 1800000, 1900000, 2000000, 2500000, | |
112 | 2700000, 2800000, 3000000, 3100000, 3200000, | |
113 | 3300000 }; | |
114 | ||
115 | static struct regulator_ops axp20x_ops_fixed = { | |
116 | .list_voltage = regulator_list_voltage_linear, | |
117 | }; | |
118 | ||
119 | static struct regulator_ops axp20x_ops_table = { | |
120 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
121 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
122 | .list_voltage = regulator_list_voltage_table, | |
b8870356 | 123 | .map_voltage = regulator_map_voltage_ascend, |
dfe7a1b0 CC |
124 | .enable = regulator_enable_regmap, |
125 | .disable = regulator_disable_regmap, | |
126 | .is_enabled = regulator_is_enabled_regmap, | |
127 | }; | |
128 | ||
129 | static struct regulator_ops axp20x_ops = { | |
130 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
131 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
132 | .list_voltage = regulator_list_voltage_linear, | |
133 | .enable = regulator_enable_regmap, | |
134 | .disable = regulator_disable_regmap, | |
135 | .is_enabled = regulator_is_enabled_regmap, | |
136 | }; | |
137 | ||
138 | static const struct regulator_desc axp20x_regulators[] = { | |
880fe82d CYT |
139 | AXP20X_DESC(DCDC2, "dcdc2", "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT, |
140 | 0x3f, AXP20X_PWR_OUT_CTRL, 0x10), | |
141 | AXP20X_DESC(DCDC3, "dcdc3", "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT, | |
142 | 0x7f, AXP20X_PWR_OUT_CTRL, 0x02), | |
143 | AXP20X_DESC_FIXED(LDO1, "ldo1", "acin", 1300), | |
144 | AXP20X_DESC(LDO2, "ldo2", "ldo24in", 1800, 3300, 100, | |
145 | AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04), | |
146 | AXP20X_DESC(LDO3, "ldo3", "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT, | |
147 | 0x7f, AXP20X_PWR_OUT_CTRL, 0x40), | |
148 | AXP20X_DESC_TABLE(LDO4, "ldo4", "ldo24in", axp20x_ldo4_data, | |
149 | AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08), | |
150 | AXP20X_DESC_IO(LDO5, "ldo5", "ldo5in", 1800, 3300, 100, | |
151 | AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07, | |
152 | AXP20X_IO_ENABLED, AXP20X_IO_DISABLED), | |
dfe7a1b0 CC |
153 | }; |
154 | ||
dfe7a1b0 CC |
155 | static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq) |
156 | { | |
157 | struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); | |
158 | ||
159 | if (dcdcfreq < 750) { | |
160 | dcdcfreq = 750; | |
161 | dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n"); | |
162 | } | |
163 | ||
164 | if (dcdcfreq > 1875) { | |
165 | dcdcfreq = 1875; | |
166 | dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n"); | |
167 | } | |
168 | ||
169 | dcdcfreq = (dcdcfreq - 750) / 75; | |
170 | ||
171 | return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ, | |
172 | AXP20X_FREQ_DCDC_MASK, dcdcfreq); | |
173 | } | |
174 | ||
175 | static int axp20x_regulator_parse_dt(struct platform_device *pdev) | |
176 | { | |
177 | struct device_node *np, *regulators; | |
178 | int ret; | |
179 | u32 dcdcfreq; | |
180 | ||
181 | np = of_node_get(pdev->dev.parent->of_node); | |
182 | if (!np) | |
183 | return 0; | |
184 | ||
a6016c52 | 185 | regulators = of_get_child_by_name(np, "regulators"); |
dfe7a1b0 CC |
186 | if (!regulators) { |
187 | dev_warn(&pdev->dev, "regulators node not found\n"); | |
188 | } else { | |
dfe7a1b0 CC |
189 | dcdcfreq = 1500; |
190 | of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq); | |
191 | ret = axp20x_set_dcdc_freq(pdev, dcdcfreq); | |
192 | if (ret < 0) { | |
193 | dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret); | |
194 | return ret; | |
195 | } | |
196 | ||
197 | of_node_put(regulators); | |
198 | } | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode) | |
204 | { | |
205 | unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK; | |
206 | ||
207 | if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3)) | |
208 | return -EINVAL; | |
209 | ||
210 | if (id == AXP20X_DCDC3) | |
211 | mask = AXP20X_WORKMODE_DCDC3_MASK; | |
212 | ||
213 | workmode <<= ffs(mask) - 1; | |
214 | ||
215 | return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode); | |
216 | } | |
217 | ||
218 | static int axp20x_regulator_probe(struct platform_device *pdev) | |
219 | { | |
220 | struct regulator_dev *rdev; | |
221 | struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); | |
765e8023 CYT |
222 | struct regulator_config config = { |
223 | .dev = pdev->dev.parent, | |
224 | .regmap = axp20x->regmap, | |
225 | }; | |
dfe7a1b0 CC |
226 | int ret, i; |
227 | u32 workmode; | |
228 | ||
765e8023 CYT |
229 | /* This only sets the dcdc freq. Ignore any errors */ |
230 | axp20x_regulator_parse_dt(pdev); | |
dfe7a1b0 CC |
231 | |
232 | for (i = 0; i < AXP20X_REG_ID_MAX; i++) { | |
dfe7a1b0 CC |
233 | rdev = devm_regulator_register(&pdev->dev, &axp20x_regulators[i], |
234 | &config); | |
235 | if (IS_ERR(rdev)) { | |
236 | dev_err(&pdev->dev, "Failed to register %s\n", | |
237 | axp20x_regulators[i].name); | |
238 | ||
239 | return PTR_ERR(rdev); | |
240 | } | |
241 | ||
765e8023 CYT |
242 | ret = of_property_read_u32(rdev->dev.of_node, |
243 | "x-powers,dcdc-workmode", | |
dfe7a1b0 CC |
244 | &workmode); |
245 | if (!ret) { | |
246 | if (axp20x_set_dcdc_workmode(rdev, i, workmode)) | |
247 | dev_err(&pdev->dev, "Failed to set workmode on %s\n", | |
248 | axp20x_regulators[i].name); | |
249 | } | |
250 | } | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | static struct platform_driver axp20x_regulator_driver = { | |
256 | .probe = axp20x_regulator_probe, | |
257 | .driver = { | |
258 | .name = "axp20x-regulator", | |
dfe7a1b0 CC |
259 | }, |
260 | }; | |
261 | ||
262 | module_platform_driver(axp20x_regulator_driver); | |
263 | ||
264 | MODULE_LICENSE("GPL v2"); | |
265 | MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); | |
266 | MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC"); |