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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 | ||
28 | #include <linux/mfd/arizona/core.h> | |
29 | #include <linux/mfd/arizona/pdata.h> | |
30 | #include <linux/mfd/arizona/registers.h> | |
31 | ||
32 | struct arizona_ldo1 { | |
33 | struct regulator_dev *regulator; | |
34 | struct arizona *arizona; | |
35 | ||
36 | struct regulator_consumer_supply supply; | |
37 | struct regulator_init_data init_data; | |
38 | }; | |
39 | ||
73ee2946 MB |
40 | static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev, |
41 | unsigned int selector) | |
42 | { | |
43 | if (selector >= rdev->desc->n_voltages) | |
44 | return -EINVAL; | |
45 | ||
46 | if (selector == rdev->desc->n_voltages - 1) | |
47 | return 1800000; | |
48 | else | |
49 | return rdev->desc->min_uV + (rdev->desc->uV_step * selector); | |
50 | } | |
51 | ||
52 | static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev, | |
53 | int min_uV, int max_uV) | |
54 | { | |
55 | int sel; | |
56 | ||
57 | sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step); | |
58 | if (sel >= rdev->desc->n_voltages) | |
59 | sel = rdev->desc->n_voltages - 1; | |
60 | ||
61 | return sel; | |
62 | } | |
63 | ||
64 | static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev, | |
65 | unsigned sel) | |
66 | { | |
67 | struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev); | |
68 | struct regmap *regmap = ldo->arizona->regmap; | |
69 | unsigned int val; | |
70 | int ret; | |
71 | ||
72 | if (sel == rdev->desc->n_voltages - 1) | |
73 | val = ARIZONA_LDO1_HI_PWR; | |
74 | else | |
75 | val = 0; | |
76 | ||
77 | ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2, | |
78 | ARIZONA_LDO1_HI_PWR, val); | |
79 | if (ret != 0) | |
80 | return ret; | |
81 | ||
73ee2946 MB |
82 | if (val) |
83 | return 0; | |
84 | ||
85 | val = sel << ARIZONA_LDO1_VSEL_SHIFT; | |
86 | ||
87 | return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1, | |
88 | ARIZONA_LDO1_VSEL_MASK, val); | |
89 | } | |
90 | ||
91 | static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev) | |
92 | { | |
93 | struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev); | |
94 | struct regmap *regmap = ldo->arizona->regmap; | |
95 | unsigned int val; | |
96 | int ret; | |
97 | ||
98 | ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val); | |
99 | if (ret != 0) | |
100 | return ret; | |
101 | ||
102 | if (val & ARIZONA_LDO1_HI_PWR) | |
103 | return rdev->desc->n_voltages - 1; | |
104 | ||
105 | ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val); | |
106 | if (ret != 0) | |
107 | return ret; | |
108 | ||
109 | return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT; | |
110 | } | |
111 | ||
03d06107 | 112 | static const struct regulator_ops arizona_ldo1_hc_ops = { |
73ee2946 MB |
113 | .list_voltage = arizona_ldo1_hc_list_voltage, |
114 | .map_voltage = arizona_ldo1_hc_map_voltage, | |
115 | .get_voltage_sel = arizona_ldo1_hc_get_voltage_sel, | |
116 | .set_voltage_sel = arizona_ldo1_hc_set_voltage_sel, | |
117 | .get_bypass = regulator_get_bypass_regmap, | |
118 | .set_bypass = regulator_set_bypass_regmap, | |
119 | }; | |
120 | ||
121 | static const struct regulator_desc arizona_ldo1_hc = { | |
122 | .name = "LDO1", | |
123 | .supply_name = "LDOVDD", | |
124 | .type = REGULATOR_VOLTAGE, | |
125 | .ops = &arizona_ldo1_hc_ops, | |
126 | ||
127 | .bypass_reg = ARIZONA_LDO1_CONTROL_1, | |
128 | .bypass_mask = ARIZONA_LDO1_BYPASS, | |
129 | .min_uV = 900000, | |
130 | .uV_step = 50000, | |
131 | .n_voltages = 8, | |
ce1bcb7e | 132 | .enable_time = 1500, |
88f0e3a5 | 133 | .ramp_delay = 24000, |
73ee2946 MB |
134 | |
135 | .owner = THIS_MODULE, | |
136 | }; | |
137 | ||
03d06107 | 138 | static const struct regulator_ops arizona_ldo1_ops = { |
1910efa1 MB |
139 | .list_voltage = regulator_list_voltage_linear, |
140 | .map_voltage = regulator_map_voltage_linear, | |
141 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
142 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
143 | }; | |
144 | ||
145 | static const struct regulator_desc arizona_ldo1 = { | |
146 | .name = "LDO1", | |
147 | .supply_name = "LDOVDD", | |
148 | .type = REGULATOR_VOLTAGE, | |
149 | .ops = &arizona_ldo1_ops, | |
150 | ||
151 | .vsel_reg = ARIZONA_LDO1_CONTROL_1, | |
152 | .vsel_mask = ARIZONA_LDO1_VSEL_MASK, | |
153 | .min_uV = 900000, | |
a35ff286 CK |
154 | .uV_step = 25000, |
155 | .n_voltages = 13, | |
86a14501 | 156 | .enable_time = 500, |
88f0e3a5 | 157 | .ramp_delay = 24000, |
1910efa1 MB |
158 | |
159 | .owner = THIS_MODULE, | |
160 | }; | |
161 | ||
55a18aef MB |
162 | static const struct regulator_init_data arizona_ldo1_dvfs = { |
163 | .constraints = { | |
164 | .min_uV = 1200000, | |
165 | .max_uV = 1800000, | |
166 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | | |
167 | REGULATOR_CHANGE_VOLTAGE, | |
168 | }, | |
169 | .num_consumer_supplies = 1, | |
170 | }; | |
171 | ||
1910efa1 | 172 | static const struct regulator_init_data arizona_ldo1_default = { |
a9905b1d MB |
173 | .constraints = { |
174 | .valid_ops_mask = REGULATOR_CHANGE_STATUS, | |
175 | }, | |
1910efa1 MB |
176 | .num_consumer_supplies = 1, |
177 | }; | |
178 | ||
9a6c2feb CK |
179 | static const struct regulator_init_data arizona_ldo1_wm5110 = { |
180 | .constraints = { | |
181 | .min_uV = 1175000, | |
182 | .max_uV = 1200000, | |
183 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | | |
184 | REGULATOR_CHANGE_VOLTAGE, | |
185 | }, | |
186 | .num_consumer_supplies = 1, | |
187 | }; | |
188 | ||
0feb837a CK |
189 | static int arizona_ldo1_of_get_pdata(struct device *dev, |
190 | struct arizona *arizona, | |
072e78b1 JMC |
191 | struct regulator_config *config, |
192 | const struct regulator_desc *desc) | |
4a8c475f CK |
193 | { |
194 | struct arizona_pdata *pdata = &arizona->pdata; | |
2cce4be9 | 195 | struct arizona_ldo1 *ldo1 = config->driver_data; |
ce938001 | 196 | struct device_node *np = arizona->dev->of_node; |
2cce4be9 CK |
197 | struct device_node *init_node, *dcvdd_node; |
198 | struct regulator_init_data *init_data; | |
4a8c475f | 199 | |
ce938001 CK |
200 | pdata->ldoena = of_get_named_gpio(np, "wlf,ldoena", 0); |
201 | if (pdata->ldoena < 0) { | |
202 | dev_warn(arizona->dev, | |
203 | "LDOENA GPIO property missing/malformed: %d\n", | |
204 | pdata->ldoena); | |
205 | pdata->ldoena = 0; | |
206 | } else { | |
207 | config->ena_gpio_initialized = true; | |
208 | } | |
4a8c475f | 209 | |
ce938001 CK |
210 | init_node = of_get_child_by_name(np, "ldo1"); |
211 | dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0); | |
2cce4be9 CK |
212 | |
213 | if (init_node) { | |
214 | config->of_node = init_node; | |
215 | ||
0feb837a | 216 | init_data = of_get_regulator_init_data(dev, init_node, desc); |
2cce4be9 CK |
217 | |
218 | if (init_data) { | |
219 | init_data->consumer_supplies = &ldo1->supply; | |
220 | init_data->num_consumer_supplies = 1; | |
221 | ||
222 | if (dcvdd_node && dcvdd_node != init_node) | |
223 | arizona->external_dcvdd = true; | |
224 | ||
225 | pdata->ldo1 = init_data; | |
226 | } | |
227 | } else if (dcvdd_node) { | |
228 | arizona->external_dcvdd = true; | |
229 | } | |
230 | ||
231 | of_node_put(dcvdd_node); | |
232 | ||
4a8c475f CK |
233 | return 0; |
234 | } | |
235 | ||
a5023574 | 236 | static int arizona_ldo1_probe(struct platform_device *pdev) |
1910efa1 MB |
237 | { |
238 | struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); | |
73ee2946 | 239 | const struct regulator_desc *desc; |
1910efa1 MB |
240 | struct regulator_config config = { }; |
241 | struct arizona_ldo1 *ldo1; | |
242 | int ret; | |
243 | ||
4a8c475f CK |
244 | arizona->external_dcvdd = false; |
245 | ||
1910efa1 | 246 | ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); |
f4a6c5b4 | 247 | if (!ldo1) |
1910efa1 | 248 | return -ENOMEM; |
1910efa1 MB |
249 | |
250 | ldo1->arizona = arizona; | |
251 | ||
252 | /* | |
253 | * Since the chip usually supplies itself we provide some | |
254 | * default init_data for it. This will be overridden with | |
255 | * platform data if provided. | |
256 | */ | |
55a18aef MB |
257 | switch (arizona->type) { |
258 | case WM5102: | |
a35ff286 | 259 | case WM8997: |
33aa3800 RF |
260 | case WM8998: |
261 | case WM1814: | |
73ee2946 | 262 | desc = &arizona_ldo1_hc; |
55a18aef MB |
263 | ldo1->init_data = arizona_ldo1_dvfs; |
264 | break; | |
9a6c2feb CK |
265 | case WM5110: |
266 | case WM8280: | |
267 | desc = &arizona_ldo1; | |
268 | ldo1->init_data = arizona_ldo1_wm5110; | |
269 | break; | |
55a18aef | 270 | default: |
73ee2946 | 271 | desc = &arizona_ldo1; |
55a18aef MB |
272 | ldo1->init_data = arizona_ldo1_default; |
273 | break; | |
274 | } | |
275 | ||
1910efa1 MB |
276 | ldo1->init_data.consumer_supplies = &ldo1->supply; |
277 | ldo1->supply.supply = "DCVDD"; | |
278 | ldo1->supply.dev_name = dev_name(arizona->dev); | |
279 | ||
280 | config.dev = arizona->dev; | |
281 | config.driver_data = ldo1; | |
282 | config.regmap = arizona->regmap; | |
4a8c475f CK |
283 | |
284 | if (IS_ENABLED(CONFIG_OF)) { | |
285 | if (!dev_get_platdata(arizona->dev)) { | |
0feb837a CK |
286 | ret = arizona_ldo1_of_get_pdata(&pdev->dev, arizona, |
287 | &config, desc); | |
4a8c475f CK |
288 | if (ret < 0) |
289 | return ret; | |
290 | } | |
291 | } | |
292 | ||
a9905b1d | 293 | config.ena_gpio = arizona->pdata.ldoena; |
1910efa1 MB |
294 | |
295 | if (arizona->pdata.ldo1) | |
296 | config.init_data = arizona->pdata.ldo1; | |
297 | else | |
298 | config.init_data = &ldo1->init_data; | |
299 | ||
4a8c475f CK |
300 | /* |
301 | * LDO1 can only be used to supply DCVDD so if it has no | |
302 | * consumers then DCVDD is supplied externally. | |
303 | */ | |
304 | if (config.init_data->num_consumer_supplies == 0) | |
305 | arizona->external_dcvdd = true; | |
306 | ||
14ffa888 | 307 | ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config); |
ec454d70 CK |
308 | |
309 | of_node_put(config.of_node); | |
310 | ||
1910efa1 MB |
311 | if (IS_ERR(ldo1->regulator)) { |
312 | ret = PTR_ERR(ldo1->regulator); | |
313 | dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n", | |
314 | ret); | |
315 | return ret; | |
316 | } | |
317 | ||
318 | platform_set_drvdata(pdev, ldo1); | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
1910efa1 MB |
323 | static struct platform_driver arizona_ldo1_driver = { |
324 | .probe = arizona_ldo1_probe, | |
1910efa1 MB |
325 | .driver = { |
326 | .name = "arizona-ldo1", | |
1910efa1 MB |
327 | }, |
328 | }; | |
329 | ||
330 | module_platform_driver(arizona_ldo1_driver); | |
331 | ||
332 | /* Module information */ | |
333 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
334 | MODULE_DESCRIPTION("Arizona LDO1 driver"); | |
335 | MODULE_LICENSE("GPL"); | |
336 | MODULE_ALIAS("platform:arizona-ldo1"); |