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Commit | Line | Data |
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452534e5 VB |
1 | /* |
2 | * Regulator driver for tps65090 power management chip. | |
3 | * | |
4 | * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. | |
5 | ||
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | ||
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | ||
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. If not, see <http://www.gnu.org/licenses/> | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
452534e5 | 20 | #include <linux/init.h> |
f329b175 | 21 | #include <linux/gpio.h> |
6c7a7a0e | 22 | #include <linux/of_gpio.h> |
452534e5 VB |
23 | #include <linux/slab.h> |
24 | #include <linux/err.h> | |
25 | #include <linux/platform_device.h> | |
26 | #include <linux/regulator/driver.h> | |
27 | #include <linux/regulator/machine.h> | |
6c7a7a0e | 28 | #include <linux/regulator/of_regulator.h> |
452534e5 | 29 | #include <linux/mfd/tps65090.h> |
452534e5 VB |
30 | |
31 | struct tps65090_regulator { | |
452534e5 | 32 | struct device *dev; |
24282a1c LD |
33 | struct regulator_desc *desc; |
34 | struct regulator_dev *rdev; | |
452534e5 VB |
35 | }; |
36 | ||
f329b175 LD |
37 | static struct regulator_ops tps65090_ext_control_ops = { |
38 | }; | |
39 | ||
40 | static struct regulator_ops tps65090_reg_contol_ops = { | |
41 | .enable = regulator_enable_regmap, | |
42 | .disable = regulator_disable_regmap, | |
43 | .is_enabled = regulator_is_enabled_regmap, | |
452534e5 VB |
44 | }; |
45 | ||
3a81ef8c LD |
46 | static struct regulator_ops tps65090_ldo_ops = { |
47 | }; | |
48 | ||
24282a1c | 49 | #define tps65090_REG_DESC(_id, _sname, _en_reg, _ops) \ |
452534e5 | 50 | { \ |
24282a1c LD |
51 | .name = "TPS65090_RAILS"#_id, \ |
52 | .supply_name = _sname, \ | |
8620ca9f | 53 | .id = TPS65090_REGULATOR_##_id, \ |
24282a1c LD |
54 | .ops = &_ops, \ |
55 | .enable_reg = _en_reg, \ | |
56 | .enable_mask = BIT(0), \ | |
57 | .type = REGULATOR_VOLTAGE, \ | |
58 | .owner = THIS_MODULE, \ | |
452534e5 VB |
59 | } |
60 | ||
24282a1c | 61 | static struct regulator_desc tps65090_regulator_desc[] = { |
f329b175 LD |
62 | tps65090_REG_DESC(DCDC1, "vsys1", 0x0C, tps65090_reg_contol_ops), |
63 | tps65090_REG_DESC(DCDC2, "vsys2", 0x0D, tps65090_reg_contol_ops), | |
64 | tps65090_REG_DESC(DCDC3, "vsys3", 0x0E, tps65090_reg_contol_ops), | |
65 | tps65090_REG_DESC(FET1, "infet1", 0x0F, tps65090_reg_contol_ops), | |
66 | tps65090_REG_DESC(FET2, "infet2", 0x10, tps65090_reg_contol_ops), | |
67 | tps65090_REG_DESC(FET3, "infet3", 0x11, tps65090_reg_contol_ops), | |
68 | tps65090_REG_DESC(FET4, "infet4", 0x12, tps65090_reg_contol_ops), | |
69 | tps65090_REG_DESC(FET5, "infet5", 0x13, tps65090_reg_contol_ops), | |
70 | tps65090_REG_DESC(FET6, "infet6", 0x14, tps65090_reg_contol_ops), | |
71 | tps65090_REG_DESC(FET7, "infet7", 0x15, tps65090_reg_contol_ops), | |
6c7a7a0e LD |
72 | tps65090_REG_DESC(LDO1, "vsys-l1", 0, tps65090_ldo_ops), |
73 | tps65090_REG_DESC(LDO2, "vsys-l2", 0, tps65090_ldo_ops), | |
452534e5 VB |
74 | }; |
75 | ||
24282a1c | 76 | static inline bool is_dcdc(int id) |
452534e5 | 77 | { |
24282a1c | 78 | switch (id) { |
8620ca9f LD |
79 | case TPS65090_REGULATOR_DCDC1: |
80 | case TPS65090_REGULATOR_DCDC2: | |
81 | case TPS65090_REGULATOR_DCDC3: | |
24282a1c LD |
82 | return true; |
83 | default: | |
84 | return false; | |
85 | } | |
86 | } | |
452534e5 | 87 | |
a5023574 | 88 | static int tps65090_config_ext_control( |
24282a1c LD |
89 | struct tps65090_regulator *ri, bool enable) |
90 | { | |
91 | int ret; | |
92 | struct device *parent = ri->dev->parent; | |
93 | unsigned int reg_en_reg = ri->desc->enable_reg; | |
94 | ||
95 | if (enable) | |
96 | ret = tps65090_set_bits(parent, reg_en_reg, 1); | |
97 | else | |
98 | ret = tps65090_clr_bits(parent, reg_en_reg, 1); | |
99 | if (ret < 0) | |
100 | dev_err(ri->dev, "Error in updating reg 0x%x\n", reg_en_reg); | |
101 | return ret; | |
102 | } | |
103 | ||
a5023574 | 104 | static int tps65090_regulator_disable_ext_control( |
24282a1c LD |
105 | struct tps65090_regulator *ri, |
106 | struct tps65090_regulator_plat_data *tps_pdata) | |
107 | { | |
108 | int ret = 0; | |
109 | struct device *parent = ri->dev->parent; | |
110 | unsigned int reg_en_reg = ri->desc->enable_reg; | |
111 | ||
112 | /* | |
113 | * First enable output for internal control if require. | |
114 | * And then disable external control. | |
115 | */ | |
116 | if (tps_pdata->reg_init_data->constraints.always_on || | |
117 | tps_pdata->reg_init_data->constraints.boot_on) { | |
118 | ret = tps65090_set_bits(parent, reg_en_reg, 0); | |
119 | if (ret < 0) { | |
120 | dev_err(ri->dev, "Error in set reg 0x%x\n", reg_en_reg); | |
121 | return ret; | |
122 | } | |
452534e5 | 123 | } |
24282a1c | 124 | return tps65090_config_ext_control(ri, false); |
452534e5 VB |
125 | } |
126 | ||
a5023574 | 127 | static void tps65090_configure_regulator_config( |
f329b175 LD |
128 | struct tps65090_regulator_plat_data *tps_pdata, |
129 | struct regulator_config *config) | |
130 | { | |
131 | if (gpio_is_valid(tps_pdata->gpio)) { | |
132 | int gpio_flag = GPIOF_OUT_INIT_LOW; | |
133 | ||
134 | if (tps_pdata->reg_init_data->constraints.always_on || | |
135 | tps_pdata->reg_init_data->constraints.boot_on) | |
136 | gpio_flag = GPIOF_OUT_INIT_HIGH; | |
137 | ||
138 | config->ena_gpio = tps_pdata->gpio; | |
139 | config->ena_gpio_flags = gpio_flag; | |
140 | } | |
141 | } | |
142 | ||
6c7a7a0e LD |
143 | #ifdef CONFIG_OF |
144 | static struct of_regulator_match tps65090_matches[] = { | |
145 | { .name = "dcdc1", }, | |
146 | { .name = "dcdc2", }, | |
147 | { .name = "dcdc3", }, | |
148 | { .name = "fet1", }, | |
149 | { .name = "fet2", }, | |
150 | { .name = "fet3", }, | |
151 | { .name = "fet4", }, | |
152 | { .name = "fet5", }, | |
153 | { .name = "fet6", }, | |
154 | { .name = "fet7", }, | |
155 | { .name = "ldo1", }, | |
156 | { .name = "ldo2", }, | |
157 | }; | |
158 | ||
159 | static struct tps65090_platform_data *tps65090_parse_dt_reg_data( | |
160 | struct platform_device *pdev, | |
161 | struct of_regulator_match **tps65090_reg_matches) | |
162 | { | |
163 | struct tps65090_platform_data *tps65090_pdata; | |
164 | struct device_node *np = pdev->dev.parent->of_node; | |
165 | struct device_node *regulators; | |
166 | int idx = 0, ret; | |
167 | struct tps65090_regulator_plat_data *reg_pdata; | |
168 | ||
169 | tps65090_pdata = devm_kzalloc(&pdev->dev, sizeof(*tps65090_pdata), | |
170 | GFP_KERNEL); | |
171 | if (!tps65090_pdata) { | |
172 | dev_err(&pdev->dev, "Memory alloc for tps65090_pdata failed\n"); | |
173 | return ERR_PTR(-ENOMEM); | |
174 | } | |
175 | ||
176 | reg_pdata = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX * | |
177 | sizeof(*reg_pdata), GFP_KERNEL); | |
178 | if (!reg_pdata) { | |
179 | dev_err(&pdev->dev, "Memory alloc for reg_pdata failed\n"); | |
180 | return ERR_PTR(-ENOMEM); | |
181 | } | |
182 | ||
4c850ead | 183 | regulators = of_get_child_by_name(np, "regulators"); |
6c7a7a0e LD |
184 | if (!regulators) { |
185 | dev_err(&pdev->dev, "regulator node not found\n"); | |
186 | return ERR_PTR(-ENODEV); | |
187 | } | |
188 | ||
09a228e7 | 189 | ret = of_regulator_match(&pdev->dev, regulators, tps65090_matches, |
6c7a7a0e | 190 | ARRAY_SIZE(tps65090_matches)); |
026cdfe6 | 191 | of_node_put(regulators); |
6c7a7a0e LD |
192 | if (ret < 0) { |
193 | dev_err(&pdev->dev, | |
194 | "Error parsing regulator init data: %d\n", ret); | |
195 | return ERR_PTR(ret); | |
196 | } | |
197 | ||
198 | *tps65090_reg_matches = tps65090_matches; | |
199 | for (idx = 0; idx < ARRAY_SIZE(tps65090_matches); idx++) { | |
200 | struct regulator_init_data *ri_data; | |
201 | struct tps65090_regulator_plat_data *rpdata; | |
202 | ||
203 | rpdata = ®_pdata[idx]; | |
204 | ri_data = tps65090_matches[idx].init_data; | |
205 | if (!ri_data || !tps65090_matches[idx].of_node) | |
206 | continue; | |
207 | ||
208 | rpdata->reg_init_data = ri_data; | |
209 | rpdata->enable_ext_control = of_property_read_bool( | |
210 | tps65090_matches[idx].of_node, | |
211 | "ti,enable-ext-control"); | |
212 | if (rpdata->enable_ext_control) | |
213 | rpdata->gpio = of_get_named_gpio(np, | |
214 | "dcdc-ext-control-gpios", 0); | |
215 | ||
216 | tps65090_pdata->reg_pdata[idx] = rpdata; | |
217 | } | |
218 | return tps65090_pdata; | |
219 | } | |
220 | #else | |
221 | static inline struct tps65090_platform_data *tps65090_parse_dt_reg_data( | |
222 | struct platform_device *pdev, | |
223 | struct of_regulator_match **tps65090_reg_matches) | |
224 | { | |
225 | *tps65090_reg_matches = NULL; | |
226 | return NULL; | |
227 | } | |
228 | #endif | |
229 | ||
a5023574 | 230 | static int tps65090_regulator_probe(struct platform_device *pdev) |
452534e5 | 231 | { |
06c4998b | 232 | struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent); |
452534e5 | 233 | struct tps65090_regulator *ri = NULL; |
c172708d | 234 | struct regulator_config config = { }; |
452534e5 | 235 | struct regulator_dev *rdev; |
24282a1c LD |
236 | struct tps65090_regulator_plat_data *tps_pdata; |
237 | struct tps65090_regulator *pmic; | |
238 | struct tps65090_platform_data *tps65090_pdata; | |
6c7a7a0e | 239 | struct of_regulator_match *tps65090_reg_matches = NULL; |
24282a1c LD |
240 | int num; |
241 | int ret; | |
452534e5 | 242 | |
24282a1c | 243 | dev_dbg(&pdev->dev, "Probing regulator\n"); |
452534e5 | 244 | |
24282a1c | 245 | tps65090_pdata = dev_get_platdata(pdev->dev.parent); |
6c7a7a0e LD |
246 | if (!tps65090_pdata && tps65090_mfd->dev->of_node) |
247 | tps65090_pdata = tps65090_parse_dt_reg_data(pdev, | |
248 | &tps65090_reg_matches); | |
249 | if (IS_ERR_OR_NULL(tps65090_pdata)) { | |
24282a1c | 250 | dev_err(&pdev->dev, "Platform data missing\n"); |
6c7a7a0e | 251 | return tps65090_pdata ? PTR_ERR(tps65090_pdata) : -EINVAL; |
452534e5 | 252 | } |
24282a1c | 253 | |
8620ca9f | 254 | pmic = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX * sizeof(*pmic), |
24282a1c LD |
255 | GFP_KERNEL); |
256 | if (!pmic) { | |
257 | dev_err(&pdev->dev, "mem alloc for pmic failed\n"); | |
258 | return -ENOMEM; | |
259 | } | |
260 | ||
8620ca9f | 261 | for (num = 0; num < TPS65090_REGULATOR_MAX; num++) { |
24282a1c LD |
262 | tps_pdata = tps65090_pdata->reg_pdata[num]; |
263 | ||
264 | ri = &pmic[num]; | |
265 | ri->dev = &pdev->dev; | |
266 | ri->desc = &tps65090_regulator_desc[num]; | |
267 | ||
268 | /* | |
269 | * TPS5090 DCDC support the control from external digital input. | |
f329b175 | 270 | * Configure it as per platform data. |
24282a1c LD |
271 | */ |
272 | if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) { | |
f329b175 LD |
273 | if (tps_pdata->enable_ext_control) { |
274 | tps65090_configure_regulator_config( | |
275 | tps_pdata, &config); | |
276 | ri->desc->ops = &tps65090_ext_control_ops; | |
277 | } else { | |
278 | ret = tps65090_regulator_disable_ext_control( | |
24282a1c | 279 | ri, tps_pdata); |
f329b175 LD |
280 | if (ret < 0) { |
281 | dev_err(&pdev->dev, | |
24282a1c | 282 | "failed disable ext control\n"); |
9738efae | 283 | return ret; |
f329b175 | 284 | } |
24282a1c LD |
285 | } |
286 | } | |
f329b175 | 287 | |
6c7a7a0e | 288 | config.dev = pdev->dev.parent; |
24282a1c LD |
289 | config.driver_data = ri; |
290 | config.regmap = tps65090_mfd->rmap; | |
291 | if (tps_pdata) | |
292 | config.init_data = tps_pdata->reg_init_data; | |
293 | else | |
294 | config.init_data = NULL; | |
6c7a7a0e LD |
295 | if (tps65090_reg_matches) |
296 | config.of_node = tps65090_reg_matches[num].of_node; | |
297 | else | |
298 | config.of_node = NULL; | |
24282a1c | 299 | |
9738efae | 300 | rdev = devm_regulator_register(&pdev->dev, ri->desc, &config); |
24282a1c LD |
301 | if (IS_ERR(rdev)) { |
302 | dev_err(&pdev->dev, "failed to register regulator %s\n", | |
303 | ri->desc->name); | |
9738efae | 304 | return PTR_ERR(rdev); |
24282a1c LD |
305 | } |
306 | ri->rdev = rdev; | |
f329b175 LD |
307 | |
308 | /* Enable external control if it is require */ | |
309 | if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data && | |
310 | tps_pdata->enable_ext_control) { | |
311 | ret = tps65090_config_ext_control(ri, true); | |
9738efae SK |
312 | if (ret < 0) |
313 | return ret; | |
f329b175 | 314 | } |
452534e5 VB |
315 | } |
316 | ||
24282a1c | 317 | platform_set_drvdata(pdev, pmic); |
452534e5 | 318 | return 0; |
452534e5 VB |
319 | } |
320 | ||
321 | static struct platform_driver tps65090_regulator_driver = { | |
322 | .driver = { | |
8620ca9f | 323 | .name = "tps65090-pmic", |
452534e5 VB |
324 | .owner = THIS_MODULE, |
325 | }, | |
326 | .probe = tps65090_regulator_probe, | |
452534e5 VB |
327 | }; |
328 | ||
329 | static int __init tps65090_regulator_init(void) | |
330 | { | |
331 | return platform_driver_register(&tps65090_regulator_driver); | |
332 | } | |
333 | subsys_initcall(tps65090_regulator_init); | |
334 | ||
335 | static void __exit tps65090_regulator_exit(void) | |
336 | { | |
337 | platform_driver_unregister(&tps65090_regulator_driver); | |
338 | } | |
339 | module_exit(tps65090_regulator_exit); | |
340 | ||
341 | MODULE_DESCRIPTION("tps65090 regulator driver"); | |
342 | MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>"); | |
343 | MODULE_LICENSE("GPL v2"); | |
d95420b8 | 344 | MODULE_ALIAS("platform:tps65090-pmic"); |