regulator: remove use of __devexit_p
[linux-3.10.git] / drivers / regulator / tps65090-regulator.c
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>
20 #include <linux/init.h>
21 #include <linux/gpio.h>
22 #include <linux/slab.h>
23 #include <linux/err.h>
24 #include <linux/platform_device.h>
25 #include <linux/regulator/driver.h>
26 #include <linux/regulator/machine.h>
27 #include <linux/mfd/tps65090.h>
28
29 struct tps65090_regulator {
30         struct device           *dev;
31         struct regulator_desc   *desc;
32         struct regulator_dev    *rdev;
33 };
34
35 static struct regulator_ops tps65090_ext_control_ops = {
36 };
37
38 static struct regulator_ops tps65090_reg_contol_ops = {
39         .enable         = regulator_enable_regmap,
40         .disable        = regulator_disable_regmap,
41         .is_enabled     = regulator_is_enabled_regmap,
42 };
43
44 static struct regulator_ops tps65090_ldo_ops = {
45 };
46
47 #define tps65090_REG_DESC(_id, _sname, _en_reg, _ops)   \
48 {                                                       \
49         .name = "TPS65090_RAILS"#_id,                   \
50         .supply_name = _sname,                          \
51         .id = TPS65090_REGULATOR_##_id,                 \
52         .ops = &_ops,                                   \
53         .enable_reg = _en_reg,                          \
54         .enable_mask = BIT(0),                          \
55         .type = REGULATOR_VOLTAGE,                      \
56         .owner = THIS_MODULE,                           \
57 }
58
59 static struct regulator_desc tps65090_regulator_desc[] = {
60         tps65090_REG_DESC(DCDC1, "vsys1",   0x0C, tps65090_reg_contol_ops),
61         tps65090_REG_DESC(DCDC2, "vsys2",   0x0D, tps65090_reg_contol_ops),
62         tps65090_REG_DESC(DCDC3, "vsys3",   0x0E, tps65090_reg_contol_ops),
63         tps65090_REG_DESC(FET1,  "infet1",  0x0F, tps65090_reg_contol_ops),
64         tps65090_REG_DESC(FET2,  "infet2",  0x10, tps65090_reg_contol_ops),
65         tps65090_REG_DESC(FET3,  "infet3",  0x11, tps65090_reg_contol_ops),
66         tps65090_REG_DESC(FET4,  "infet4",  0x12, tps65090_reg_contol_ops),
67         tps65090_REG_DESC(FET5,  "infet5",  0x13, tps65090_reg_contol_ops),
68         tps65090_REG_DESC(FET6,  "infet6",  0x14, tps65090_reg_contol_ops),
69         tps65090_REG_DESC(FET7,  "infet7",  0x15, tps65090_reg_contol_ops),
70         tps65090_REG_DESC(LDO1,  "vsys_l1", 0,    tps65090_ldo_ops),
71         tps65090_REG_DESC(LDO2,  "vsys_l2", 0,    tps65090_ldo_ops),
72 };
73
74 static inline bool is_dcdc(int id)
75 {
76         switch (id) {
77         case TPS65090_REGULATOR_DCDC1:
78         case TPS65090_REGULATOR_DCDC2:
79         case TPS65090_REGULATOR_DCDC3:
80                 return true;
81         default:
82                 return false;
83         }
84 }
85
86 static int __devinit tps65090_config_ext_control(
87         struct tps65090_regulator *ri, bool enable)
88 {
89         int ret;
90         struct device *parent = ri->dev->parent;
91         unsigned int reg_en_reg = ri->desc->enable_reg;
92
93         if (enable)
94                 ret = tps65090_set_bits(parent, reg_en_reg, 1);
95         else
96                 ret =  tps65090_clr_bits(parent, reg_en_reg, 1);
97         if (ret < 0)
98                 dev_err(ri->dev, "Error in updating reg 0x%x\n", reg_en_reg);
99         return ret;
100 }
101
102 static int __devinit tps65090_regulator_disable_ext_control(
103                 struct tps65090_regulator *ri,
104                 struct tps65090_regulator_plat_data *tps_pdata)
105 {
106         int ret = 0;
107         struct device *parent = ri->dev->parent;
108         unsigned int reg_en_reg = ri->desc->enable_reg;
109
110         /*
111          * First enable output for internal control if require.
112          * And then disable external control.
113          */
114         if (tps_pdata->reg_init_data->constraints.always_on ||
115                         tps_pdata->reg_init_data->constraints.boot_on) {
116                 ret =  tps65090_set_bits(parent, reg_en_reg, 0);
117                 if (ret < 0) {
118                         dev_err(ri->dev, "Error in set reg 0x%x\n", reg_en_reg);
119                         return ret;
120                 }
121         }
122         return tps65090_config_ext_control(ri, false);
123 }
124
125 static void __devinit tps65090_configure_regulator_config(
126                 struct tps65090_regulator_plat_data *tps_pdata,
127                 struct regulator_config *config)
128 {
129         if (gpio_is_valid(tps_pdata->gpio)) {
130                 int gpio_flag = GPIOF_OUT_INIT_LOW;
131
132                 if (tps_pdata->reg_init_data->constraints.always_on ||
133                                 tps_pdata->reg_init_data->constraints.boot_on)
134                         gpio_flag = GPIOF_OUT_INIT_HIGH;
135
136                 config->ena_gpio = tps_pdata->gpio;
137                 config->ena_gpio_flags = gpio_flag;
138         }
139 }
140
141 static int __devinit tps65090_regulator_probe(struct platform_device *pdev)
142 {
143         struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent);
144         struct tps65090_regulator *ri = NULL;
145         struct regulator_config config = { };
146         struct regulator_dev *rdev;
147         struct tps65090_regulator_plat_data *tps_pdata;
148         struct tps65090_regulator *pmic;
149         struct tps65090_platform_data *tps65090_pdata;
150         int num;
151         int ret;
152
153         dev_dbg(&pdev->dev, "Probing regulator\n");
154
155         tps65090_pdata = dev_get_platdata(pdev->dev.parent);
156         if (!tps65090_pdata) {
157                 dev_err(&pdev->dev, "Platform data missing\n");
158                 return -EINVAL;
159         }
160
161         pmic = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX * sizeof(*pmic),
162                         GFP_KERNEL);
163         if (!pmic) {
164                 dev_err(&pdev->dev, "mem alloc for pmic failed\n");
165                 return -ENOMEM;
166         }
167
168         for (num = 0; num < TPS65090_REGULATOR_MAX; num++) {
169                 tps_pdata = tps65090_pdata->reg_pdata[num];
170
171                 ri = &pmic[num];
172                 ri->dev = &pdev->dev;
173                 ri->desc = &tps65090_regulator_desc[num];
174
175                 /*
176                  * TPS5090 DCDC support the control from external digital input.
177                  * Configure it as per platform data.
178                  */
179                 if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) {
180                         if (tps_pdata->enable_ext_control) {
181                                 tps65090_configure_regulator_config(
182                                                 tps_pdata, &config);
183                                 ri->desc->ops = &tps65090_ext_control_ops;
184                         } else {
185                                 ret = tps65090_regulator_disable_ext_control(
186                                                 ri, tps_pdata);
187                                 if (ret < 0) {
188                                         dev_err(&pdev->dev,
189                                                 "failed disable ext control\n");
190                                         goto scrub;
191                                 }
192                         }
193                 }
194
195                 config.dev = &pdev->dev;
196                 config.driver_data = ri;
197                 config.regmap = tps65090_mfd->rmap;
198                 if (tps_pdata)
199                         config.init_data = tps_pdata->reg_init_data;
200                 else
201                         config.init_data = NULL;
202
203                 rdev = regulator_register(ri->desc, &config);
204                 if (IS_ERR(rdev)) {
205                         dev_err(&pdev->dev, "failed to register regulator %s\n",
206                                 ri->desc->name);
207                         ret = PTR_ERR(rdev);
208                         goto scrub;
209                 }
210                 ri->rdev = rdev;
211
212                 /* Enable external control if it is require */
213                 if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data &&
214                                 tps_pdata->enable_ext_control) {
215                         ret = tps65090_config_ext_control(ri, true);
216                         if (ret < 0) {
217                                 /* Increment num to get unregister rdev */
218                                 num++;
219                                 goto scrub;
220                         }
221                 }
222         }
223
224         platform_set_drvdata(pdev, pmic);
225         return 0;
226
227 scrub:
228         while (--num >= 0) {
229                 ri = &pmic[num];
230                 regulator_unregister(ri->rdev);
231         }
232         return ret;
233 }
234
235 static int __devexit tps65090_regulator_remove(struct platform_device *pdev)
236 {
237         struct tps65090_regulator *pmic = platform_get_drvdata(pdev);
238         struct tps65090_regulator *ri;
239         int num;
240
241         for (num = 0; num < TPS65090_REGULATOR_MAX; ++num) {
242                 ri = &pmic[num];
243                 regulator_unregister(ri->rdev);
244         }
245         return 0;
246 }
247
248 static struct platform_driver tps65090_regulator_driver = {
249         .driver = {
250                 .name   = "tps65090-pmic",
251                 .owner  = THIS_MODULE,
252         },
253         .probe          = tps65090_regulator_probe,
254         .remove         = tps65090_regulator_remove,
255 };
256
257 static int __init tps65090_regulator_init(void)
258 {
259         return platform_driver_register(&tps65090_regulator_driver);
260 }
261 subsys_initcall(tps65090_regulator_init);
262
263 static void __exit tps65090_regulator_exit(void)
264 {
265         platform_driver_unregister(&tps65090_regulator_driver);
266 }
267 module_exit(tps65090_regulator_exit);
268
269 MODULE_DESCRIPTION("tps65090 regulator driver");
270 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
271 MODULE_LICENSE("GPL v2");