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1910efa1 MB |
1 | /* |
2 | * arizona-ldo1.c -- LDO1 supply for Arizona devices | |
3 | * | |
4 | * Copyright 2012 Wolfson Microelectronics PLC. | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/moduleparam.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/bitops.h> | |
18 | #include <linux/err.h> | |
7b22b9a5 | 19 | #include <linux/of.h> |
ce938001 | 20 | #include <linux/of_gpio.h> |
1910efa1 MB |
21 | #include <linux/platform_device.h> |
22 | #include <linux/regulator/driver.h> | |
23 | #include <linux/regulator/machine.h> | |
2cce4be9 | 24 | #include <linux/regulator/of_regulator.h> |
1910efa1 MB |
25 | #include <linux/gpio.h> |
26 | #include <linux/slab.h> | |
27 | ||
aaa84e6a RF |
28 | #include <linux/regulator/arizona-ldo1.h> |
29 | ||
1910efa1 MB |
30 | #include <linux/mfd/arizona/core.h> |
31 | #include <linux/mfd/arizona/pdata.h> | |
32 | #include <linux/mfd/arizona/registers.h> | |
33 | ||
34 | struct arizona_ldo1 { | |
35 | struct regulator_dev *regulator; | |
80a55f41 | 36 | struct regmap *regmap; |
1910efa1 MB |
37 | |
38 | struct regulator_consumer_supply supply; | |
39 | struct regulator_init_data init_data; | |
40 | }; | |
41 | ||
73ee2946 MB |
42 | static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev, |
43 | unsigned int selector) | |
44 | { | |
45 | if (selector >= rdev->desc->n_voltages) | |
46 | return -EINVAL; | |
47 | ||
48 | if (selector == rdev->desc->n_voltages - 1) | |
49 | return 1800000; | |
50 | else | |
51 | return rdev->desc->min_uV + (rdev->desc->uV_step * selector); | |
52 | } | |
53 | ||
54 | static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev, | |
55 | int min_uV, int max_uV) | |
56 | { | |
57 | int sel; | |
58 | ||
59 | sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step); | |
60 | if (sel >= rdev->desc->n_voltages) | |
61 | sel = rdev->desc->n_voltages - 1; | |
62 | ||
63 | return sel; | |
64 | } | |
65 | ||
66 | static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev, | |
67 | unsigned sel) | |
68 | { | |
69 | struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev); | |
80a55f41 | 70 | struct regmap *regmap = ldo->regmap; |
73ee2946 MB |
71 | unsigned int val; |
72 | int ret; | |
73 | ||
74 | if (sel == rdev->desc->n_voltages - 1) | |
75 | val = ARIZONA_LDO1_HI_PWR; | |
76 | else | |
77 | val = 0; | |
78 | ||
79 | ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2, | |
80 | ARIZONA_LDO1_HI_PWR, val); | |
81 | if (ret != 0) | |
82 | return ret; | |
83 | ||
73ee2946 MB |
84 | if (val) |
85 | return 0; | |
86 | ||
87 | val = sel << ARIZONA_LDO1_VSEL_SHIFT; | |
88 | ||
89 | return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1, | |
90 | ARIZONA_LDO1_VSEL_MASK, val); | |
91 | } | |
92 | ||
93 | static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev) | |
94 | { | |
95 | struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev); | |
80a55f41 | 96 | struct regmap *regmap = ldo->regmap; |
73ee2946 MB |
97 | unsigned int val; |
98 | int ret; | |
99 | ||
100 | ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val); | |
101 | if (ret != 0) | |
102 | return ret; | |
103 | ||
104 | if (val & ARIZONA_LDO1_HI_PWR) | |
105 | return rdev->desc->n_voltages - 1; | |
106 | ||
107 | ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val); | |
108 | if (ret != 0) | |
109 | return ret; | |
110 | ||
111 | return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT; | |
112 | } | |
113 | ||
03d06107 | 114 | static const struct regulator_ops arizona_ldo1_hc_ops = { |
73ee2946 MB |
115 | .list_voltage = arizona_ldo1_hc_list_voltage, |
116 | .map_voltage = arizona_ldo1_hc_map_voltage, | |
117 | .get_voltage_sel = arizona_ldo1_hc_get_voltage_sel, | |
118 | .set_voltage_sel = arizona_ldo1_hc_set_voltage_sel, | |
119 | .get_bypass = regulator_get_bypass_regmap, | |
120 | .set_bypass = regulator_set_bypass_regmap, | |
121 | }; | |
122 | ||
123 | static const struct regulator_desc arizona_ldo1_hc = { | |
124 | .name = "LDO1", | |
125 | .supply_name = "LDOVDD", | |
126 | .type = REGULATOR_VOLTAGE, | |
127 | .ops = &arizona_ldo1_hc_ops, | |
128 | ||
129 | .bypass_reg = ARIZONA_LDO1_CONTROL_1, | |
130 | .bypass_mask = ARIZONA_LDO1_BYPASS, | |
131 | .min_uV = 900000, | |
132 | .uV_step = 50000, | |
133 | .n_voltages = 8, | |
ce1bcb7e | 134 | .enable_time = 1500, |
88f0e3a5 | 135 | .ramp_delay = 24000, |
73ee2946 MB |
136 | |
137 | .owner = THIS_MODULE, | |
138 | }; | |
139 | ||
03d06107 | 140 | static const struct regulator_ops arizona_ldo1_ops = { |
1910efa1 MB |
141 | .list_voltage = regulator_list_voltage_linear, |
142 | .map_voltage = regulator_map_voltage_linear, | |
143 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
144 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
145 | }; | |
146 | ||
147 | static const struct regulator_desc arizona_ldo1 = { | |
148 | .name = "LDO1", | |
149 | .supply_name = "LDOVDD", | |
150 | .type = REGULATOR_VOLTAGE, | |
151 | .ops = &arizona_ldo1_ops, | |
152 | ||
153 | .vsel_reg = ARIZONA_LDO1_CONTROL_1, | |
154 | .vsel_mask = ARIZONA_LDO1_VSEL_MASK, | |
155 | .min_uV = 900000, | |
a35ff286 CK |
156 | .uV_step = 25000, |
157 | .n_voltages = 13, | |
86a14501 | 158 | .enable_time = 500, |
88f0e3a5 | 159 | .ramp_delay = 24000, |
1910efa1 MB |
160 | |
161 | .owner = THIS_MODULE, | |
162 | }; | |
163 | ||
55a18aef MB |
164 | static const struct regulator_init_data arizona_ldo1_dvfs = { |
165 | .constraints = { | |
166 | .min_uV = 1200000, | |
167 | .max_uV = 1800000, | |
168 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | | |
169 | REGULATOR_CHANGE_VOLTAGE, | |
170 | }, | |
171 | .num_consumer_supplies = 1, | |
172 | }; | |
173 | ||
1910efa1 | 174 | static const struct regulator_init_data arizona_ldo1_default = { |
a9905b1d MB |
175 | .constraints = { |
176 | .valid_ops_mask = REGULATOR_CHANGE_STATUS, | |
177 | }, | |
1910efa1 MB |
178 | .num_consumer_supplies = 1, |
179 | }; | |
180 | ||
9a6c2feb CK |
181 | static const struct regulator_init_data arizona_ldo1_wm5110 = { |
182 | .constraints = { | |
183 | .min_uV = 1175000, | |
184 | .max_uV = 1200000, | |
185 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | | |
186 | REGULATOR_CHANGE_VOLTAGE, | |
187 | }, | |
188 | .num_consumer_supplies = 1, | |
189 | }; | |
190 | ||
aaa84e6a | 191 | static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata, |
072e78b1 | 192 | struct regulator_config *config, |
aaa84e6a RF |
193 | const struct regulator_desc *desc, |
194 | bool *external_dcvdd) | |
4a8c475f | 195 | { |
2cce4be9 | 196 | struct arizona_ldo1 *ldo1 = config->driver_data; |
aaa84e6a | 197 | struct device_node *np = config->dev->of_node; |
2cce4be9 CK |
198 | struct device_node *init_node, *dcvdd_node; |
199 | struct regulator_init_data *init_data; | |
4a8c475f | 200 | |
ce938001 CK |
201 | pdata->ldoena = of_get_named_gpio(np, "wlf,ldoena", 0); |
202 | if (pdata->ldoena < 0) { | |
aaa84e6a | 203 | dev_warn(config->dev, |
ce938001 CK |
204 | "LDOENA GPIO property missing/malformed: %d\n", |
205 | pdata->ldoena); | |
206 | pdata->ldoena = 0; | |
207 | } else { | |
208 | config->ena_gpio_initialized = true; | |
209 | } | |
4a8c475f | 210 | |
ce938001 CK |
211 | init_node = of_get_child_by_name(np, "ldo1"); |
212 | dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0); | |
2cce4be9 CK |
213 | |
214 | if (init_node) { | |
215 | config->of_node = init_node; | |
216 | ||
aaa84e6a RF |
217 | init_data = of_get_regulator_init_data(config->dev, init_node, |
218 | desc); | |
2cce4be9 CK |
219 | if (init_data) { |
220 | init_data->consumer_supplies = &ldo1->supply; | |
221 | init_data->num_consumer_supplies = 1; | |
222 | ||
223 | if (dcvdd_node && dcvdd_node != init_node) | |
aaa84e6a | 224 | *external_dcvdd = true; |
2cce4be9 | 225 | |
aaa84e6a | 226 | pdata->init_data = init_data; |
2cce4be9 CK |
227 | } |
228 | } else if (dcvdd_node) { | |
aaa84e6a | 229 | *external_dcvdd = true; |
2cce4be9 CK |
230 | } |
231 | ||
232 | of_node_put(dcvdd_node); | |
233 | ||
4a8c475f CK |
234 | return 0; |
235 | } | |
236 | ||
af367afa RF |
237 | static int arizona_ldo1_common_init(struct platform_device *pdev, |
238 | struct arizona_ldo1 *ldo1, | |
239 | const struct regulator_desc *desc, | |
240 | struct arizona_ldo1_pdata *pdata, | |
241 | bool *external_dcvdd) | |
1910efa1 | 242 | { |
af367afa | 243 | struct device *parent_dev = pdev->dev.parent; |
1910efa1 | 244 | struct regulator_config config = { }; |
1910efa1 MB |
245 | int ret; |
246 | ||
af367afa | 247 | *external_dcvdd = false; |
55a18aef | 248 | |
1910efa1 | 249 | ldo1->supply.supply = "DCVDD"; |
af367afa RF |
250 | ldo1->init_data.consumer_supplies = &ldo1->supply; |
251 | ldo1->supply.dev_name = dev_name(parent_dev); | |
1910efa1 | 252 | |
af367afa | 253 | config.dev = parent_dev; |
1910efa1 | 254 | config.driver_data = ldo1; |
af367afa | 255 | config.regmap = ldo1->regmap; |
4a8c475f CK |
256 | |
257 | if (IS_ENABLED(CONFIG_OF)) { | |
af367afa RF |
258 | if (!dev_get_platdata(parent_dev)) { |
259 | ret = arizona_ldo1_of_get_pdata(pdata, | |
aaa84e6a | 260 | &config, desc, |
af367afa | 261 | external_dcvdd); |
4a8c475f CK |
262 | if (ret < 0) |
263 | return ret; | |
264 | } | |
265 | } | |
266 | ||
af367afa | 267 | config.ena_gpio = pdata->ldoena; |
1910efa1 | 268 | |
af367afa RF |
269 | if (pdata->init_data) |
270 | config.init_data = pdata->init_data; | |
1910efa1 MB |
271 | else |
272 | config.init_data = &ldo1->init_data; | |
273 | ||
4a8c475f CK |
274 | /* |
275 | * LDO1 can only be used to supply DCVDD so if it has no | |
276 | * consumers then DCVDD is supplied externally. | |
277 | */ | |
278 | if (config.init_data->num_consumer_supplies == 0) | |
af367afa | 279 | *external_dcvdd = true; |
4a8c475f | 280 | |
14ffa888 | 281 | ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config); |
ec454d70 CK |
282 | |
283 | of_node_put(config.of_node); | |
284 | ||
1910efa1 MB |
285 | if (IS_ERR(ldo1->regulator)) { |
286 | ret = PTR_ERR(ldo1->regulator); | |
af367afa | 287 | dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n", |
1910efa1 MB |
288 | ret); |
289 | return ret; | |
290 | } | |
291 | ||
292 | platform_set_drvdata(pdev, ldo1); | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
af367afa RF |
297 | static int arizona_ldo1_probe(struct platform_device *pdev) |
298 | { | |
299 | struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); | |
300 | struct arizona_ldo1 *ldo1; | |
301 | const struct regulator_desc *desc; | |
302 | bool external_dcvdd; | |
303 | int ret; | |
304 | ||
305 | ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); | |
306 | if (!ldo1) | |
307 | return -ENOMEM; | |
308 | ||
309 | ldo1->regmap = arizona->regmap; | |
310 | ||
311 | /* | |
312 | * Since the chip usually supplies itself we provide some | |
313 | * default init_data for it. This will be overridden with | |
314 | * platform data if provided. | |
315 | */ | |
316 | switch (arizona->type) { | |
317 | case WM5102: | |
318 | case WM8997: | |
319 | case WM8998: | |
320 | case WM1814: | |
321 | desc = &arizona_ldo1_hc; | |
322 | ldo1->init_data = arizona_ldo1_dvfs; | |
323 | break; | |
324 | case WM5110: | |
325 | case WM8280: | |
326 | desc = &arizona_ldo1; | |
327 | ldo1->init_data = arizona_ldo1_wm5110; | |
328 | break; | |
329 | default: | |
330 | desc = &arizona_ldo1; | |
331 | ldo1->init_data = arizona_ldo1_default; | |
332 | break; | |
333 | } | |
334 | ||
335 | ret = arizona_ldo1_common_init(pdev, ldo1, desc, | |
336 | &arizona->pdata.ldo1, | |
337 | &external_dcvdd); | |
338 | if (ret == 0) | |
339 | arizona->external_dcvdd = external_dcvdd; | |
340 | ||
341 | return ret; | |
342 | } | |
343 | ||
1910efa1 MB |
344 | static struct platform_driver arizona_ldo1_driver = { |
345 | .probe = arizona_ldo1_probe, | |
1910efa1 MB |
346 | .driver = { |
347 | .name = "arizona-ldo1", | |
1910efa1 MB |
348 | }, |
349 | }; | |
350 | ||
351 | module_platform_driver(arizona_ldo1_driver); | |
352 | ||
353 | /* Module information */ | |
354 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
355 | MODULE_DESCRIPTION("Arizona LDO1 driver"); | |
356 | MODULE_LICENSE("GPL"); | |
357 | MODULE_ALIAS("platform:arizona-ldo1"); |