regulator: palmas: Convert palmas_ops_smps to regulator_[get|set]_voltage_sel_regmap
[linux-3.10.git] / drivers / regulator / anatop-regulator.c
1 /*
2  * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
3  */
4
5 /*
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15
16  * You should have received a copy of the GNU General Public License along
17  * with this program; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20
21 #include <linux/slab.h>
22 #include <linux/device.h>
23 #include <linux/module.h>
24 #include <linux/mfd/syscon.h>
25 #include <linux/err.h>
26 #include <linux/io.h>
27 #include <linux/platform_device.h>
28 #include <linux/of.h>
29 #include <linux/of_address.h>
30 #include <linux/regmap.h>
31 #include <linux/regulator/driver.h>
32 #include <linux/regulator/of_regulator.h>
33
34 struct anatop_regulator {
35         const char *name;
36         u32 control_reg;
37         struct regmap *anatop;
38         int vol_bit_shift;
39         int vol_bit_width;
40         int min_bit_val;
41         int min_voltage;
42         int max_voltage;
43         struct regulator_desc rdesc;
44         struct regulator_init_data *initdata;
45 };
46
47 static int anatop_regmap_set_voltage_sel(struct regulator_dev *reg,
48                                         unsigned selector)
49 {
50         struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg);
51         u32 val, mask;
52
53         if (!anatop_reg->control_reg)
54                 return -ENOTSUPP;
55
56         val = anatop_reg->min_bit_val + selector;
57         dev_dbg(&reg->dev, "%s: calculated val %d\n", __func__, val);
58         mask = ((1 << anatop_reg->vol_bit_width) - 1) <<
59                 anatop_reg->vol_bit_shift;
60         val <<= anatop_reg->vol_bit_shift;
61         regmap_update_bits(anatop_reg->anatop, anatop_reg->control_reg,
62                                 mask, val);
63
64         return 0;
65 }
66
67 static int anatop_regmap_get_voltage_sel(struct regulator_dev *reg)
68 {
69         struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg);
70         u32 val, mask;
71
72         if (!anatop_reg->control_reg)
73                 return -ENOTSUPP;
74
75         regmap_read(anatop_reg->anatop, anatop_reg->control_reg, &val);
76         mask = ((1 << anatop_reg->vol_bit_width) - 1) <<
77                 anatop_reg->vol_bit_shift;
78         val = (val & mask) >> anatop_reg->vol_bit_shift;
79
80         return val - anatop_reg->min_bit_val;
81 }
82
83 static struct regulator_ops anatop_rops = {
84         .set_voltage_sel = anatop_regmap_set_voltage_sel,
85         .get_voltage_sel = anatop_regmap_get_voltage_sel,
86         .list_voltage = regulator_list_voltage_linear,
87         .map_voltage = regulator_map_voltage_linear,
88 };
89
90 static int __devinit anatop_regulator_probe(struct platform_device *pdev)
91 {
92         struct device *dev = &pdev->dev;
93         struct device_node *np = dev->of_node;
94         struct device_node *anatop_np;
95         struct regulator_desc *rdesc;
96         struct regulator_dev *rdev;
97         struct anatop_regulator *sreg;
98         struct regulator_init_data *initdata;
99         struct regulator_config config = { };
100         int ret = 0;
101
102         initdata = of_get_regulator_init_data(dev, np);
103         sreg = devm_kzalloc(dev, sizeof(*sreg), GFP_KERNEL);
104         if (!sreg)
105                 return -ENOMEM;
106         sreg->initdata = initdata;
107         sreg->name = kstrdup(of_get_property(np, "regulator-name", NULL),
108                              GFP_KERNEL);
109         rdesc = &sreg->rdesc;
110         memset(rdesc, 0, sizeof(*rdesc));
111         rdesc->name = sreg->name;
112         rdesc->ops = &anatop_rops;
113         rdesc->type = REGULATOR_VOLTAGE;
114         rdesc->owner = THIS_MODULE;
115
116         anatop_np = of_get_parent(np);
117         if (!anatop_np)
118                 return -ENODEV;
119         sreg->anatop = syscon_node_to_regmap(anatop_np);
120         of_node_put(anatop_np);
121         if (IS_ERR(sreg->anatop))
122                 return PTR_ERR(sreg->anatop);
123
124         ret = of_property_read_u32(np, "anatop-reg-offset",
125                                    &sreg->control_reg);
126         if (ret) {
127                 dev_err(dev, "no anatop-reg-offset property set\n");
128                 goto anatop_probe_end;
129         }
130         ret = of_property_read_u32(np, "anatop-vol-bit-width",
131                                    &sreg->vol_bit_width);
132         if (ret) {
133                 dev_err(dev, "no anatop-vol-bit-width property set\n");
134                 goto anatop_probe_end;
135         }
136         ret = of_property_read_u32(np, "anatop-vol-bit-shift",
137                                    &sreg->vol_bit_shift);
138         if (ret) {
139                 dev_err(dev, "no anatop-vol-bit-shift property set\n");
140                 goto anatop_probe_end;
141         }
142         ret = of_property_read_u32(np, "anatop-min-bit-val",
143                                    &sreg->min_bit_val);
144         if (ret) {
145                 dev_err(dev, "no anatop-min-bit-val property set\n");
146                 goto anatop_probe_end;
147         }
148         ret = of_property_read_u32(np, "anatop-min-voltage",
149                                    &sreg->min_voltage);
150         if (ret) {
151                 dev_err(dev, "no anatop-min-voltage property set\n");
152                 goto anatop_probe_end;
153         }
154         ret = of_property_read_u32(np, "anatop-max-voltage",
155                                    &sreg->max_voltage);
156         if (ret) {
157                 dev_err(dev, "no anatop-max-voltage property set\n");
158                 goto anatop_probe_end;
159         }
160
161         rdesc->n_voltages = (sreg->max_voltage - sreg->min_voltage)
162                 / 25000 + 1;
163         rdesc->min_uV = sreg->min_voltage;
164         rdesc->uV_step = 25000;
165
166         config.dev = &pdev->dev;
167         config.init_data = initdata;
168         config.driver_data = sreg;
169         config.of_node = pdev->dev.of_node;
170
171         /* register regulator */
172         rdev = regulator_register(rdesc, &config);
173         if (IS_ERR(rdev)) {
174                 dev_err(dev, "failed to register %s\n",
175                         rdesc->name);
176                 ret = PTR_ERR(rdev);
177                 goto anatop_probe_end;
178         }
179
180         platform_set_drvdata(pdev, rdev);
181
182 anatop_probe_end:
183         if (ret)
184                 kfree(sreg->name);
185
186         return ret;
187 }
188
189 static int __devexit anatop_regulator_remove(struct platform_device *pdev)
190 {
191         struct regulator_dev *rdev = platform_get_drvdata(pdev);
192         struct anatop_regulator *sreg = rdev_get_drvdata(rdev);
193         const char *name = sreg->name;
194
195         regulator_unregister(rdev);
196         kfree(name);
197
198         return 0;
199 }
200
201 static struct of_device_id __devinitdata of_anatop_regulator_match_tbl[] = {
202         { .compatible = "fsl,anatop-regulator", },
203         { /* end */ }
204 };
205
206 static struct platform_driver anatop_regulator_driver = {
207         .driver = {
208                 .name   = "anatop_regulator",
209                 .owner  = THIS_MODULE,
210                 .of_match_table = of_anatop_regulator_match_tbl,
211         },
212         .probe  = anatop_regulator_probe,
213         .remove = __devexit_p(anatop_regulator_remove),
214 };
215
216 static int __init anatop_regulator_init(void)
217 {
218         return platform_driver_register(&anatop_regulator_driver);
219 }
220 postcore_initcall(anatop_regulator_init);
221
222 static void __exit anatop_regulator_exit(void)
223 {
224         platform_driver_unregister(&anatop_regulator_driver);
225 }
226 module_exit(anatop_regulator_exit);
227
228 MODULE_AUTHOR("Nancy Chen <Nancy.Chen@freescale.com>, "
229               "Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>");
230 MODULE_DESCRIPTION("ANATOP Regulator driver");
231 MODULE_LICENSE("GPL v2");