Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/regulator/pcap-regulator.c

  1 /*
  2  * PCAP2 Regulator Driver
  3  *
  4  * Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.com>
  5  *
  6  * This program is free software; you can redistribute  it and/or modify it
  7  * under  the terms of  the GNU General  Public License as published by the
  8  * Free Software Foundation;  either version 2 of the  License, or (at your
  9  * option) any later version.
 10  */
 11 
 12 #include <linux/kernel.h>
 13 #include <linux/module.h>
 14 #include <linux/init.h>
 15 #include <linux/err.h>
 16 #include <linux/platform_device.h>
 17 #include <linux/regulator/driver.h>
 18 #include <linux/regulator/machine.h>
 19 #include <linux/mfd/ezx-pcap.h>
 20 
 21 static const unsigned int V1_table[] = {
 22         2775000, 1275000, 1600000, 1725000, 1825000, 1925000, 2075000, 2275000,
 23 };
 24 
 25 static const unsigned int V2_table[] = {
 26         2500000, 2775000,
 27 };
 28 
 29 static const unsigned int V3_table[] = {
 30         1075000, 1275000, 1550000, 1725000, 1876000, 1950000, 2075000, 2275000,
 31 };
 32 
 33 static const unsigned int V4_table[] = {
 34         1275000, 1550000, 1725000, 1875000, 1950000, 2075000, 2275000, 2775000,
 35 };
 36 
 37 static const unsigned int V5_table[] = {
 38         1875000, 2275000, 2475000, 2775000,
 39 };
 40 
 41 static const unsigned int V6_table[] = {
 42         2475000, 2775000,
 43 };
 44 
 45 static const unsigned int V7_table[] = {
 46         1875000, 2775000,
 47 };
 48 
 49 #define V8_table V4_table
 50 
 51 static const unsigned int V9_table[] = {
 52         1575000, 1875000, 2475000, 2775000,
 53 };
 54 
 55 static const unsigned int V10_table[] = {
 56         5000000,
 57 };
 58 
 59 static const unsigned int VAUX1_table[] = {
 60         1875000, 2475000, 2775000, 3000000,
 61 };
 62 
 63 #define VAUX2_table VAUX1_table
 64 
 65 static const unsigned int VAUX3_table[] = {
 66         1200000, 1200000, 1200000, 1200000, 1400000, 1600000, 1800000, 2000000,
 67         2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000, 3600000,
 68 };
 69 
 70 static const unsigned int VAUX4_table[] = {
 71         1800000, 1800000, 3000000, 5000000,
 72 };
 73 
 74 static const unsigned int VSIM_table[] = {
 75         1875000, 3000000,
 76 };
 77 
 78 static const unsigned int VSIM2_table[] = {
 79         1875000,
 80 };
 81 
 82 static const unsigned int VVIB_table[] = {
 83         1300000, 1800000, 2000000, 3000000,
 84 };
 85 
 86 static const unsigned int SW1_table[] = {
 87          900000,  950000, 1000000, 1050000, 1100000, 1150000, 1200000, 1250000,
 88         1300000, 1350000, 1400000, 1450000, 1500000, 1600000, 1875000, 2250000,
 89 };
 90 
 91 #define SW2_table SW1_table
 92 
 93 static const unsigned int SW3_table[] = {
 94         4000000, 4500000, 5000000, 5500000,
 95 };
 96 
 97 struct pcap_regulator {
 98         const u8 reg;
 99         const u8 en;
100         const u8 index;
101         const u8 stby;
102         const u8 lowpwr;
103 };
104 
105 #define NA 0xff
106 
107 #define VREG_INFO(_vreg, _reg, _en, _index, _stby, _lowpwr)             \
108         [_vreg] = {                                                     \
109                 .reg            = _reg,                                 \
110                 .en             = _en,                                  \
111                 .index          = _index,                               \
112                 .stby           = _stby,                                \
113                 .lowpwr         = _lowpwr,                              \
114         }
115 
116 static struct pcap_regulator vreg_table[] = {
117         VREG_INFO(V1,    PCAP_REG_VREG1,   1,  2,  18, 0),
118         VREG_INFO(V2,    PCAP_REG_VREG1,   5,  6,  19, 22),
119         VREG_INFO(V3,    PCAP_REG_VREG1,   7,  8,  20, 23),
120         VREG_INFO(V4,    PCAP_REG_VREG1,   11, 12, 21, 24),
121         /* V5 STBY and LOWPWR are on PCAP_REG_VREG2 */
122         VREG_INFO(V5,    PCAP_REG_VREG1,   15, 16, 12, 19),
123 
124         VREG_INFO(V6,    PCAP_REG_VREG2,   1,  2,  14, 20),
125         VREG_INFO(V7,    PCAP_REG_VREG2,   3,  4,  15, 21),
126         VREG_INFO(V8,    PCAP_REG_VREG2,   5,  6,  16, 22),
127         VREG_INFO(V9,    PCAP_REG_VREG2,   9,  10, 17, 23),
128         VREG_INFO(V10,   PCAP_REG_VREG2,   10, NA, 18, 24),
129 
130         VREG_INFO(VAUX1, PCAP_REG_AUXVREG, 1,  2,  22, 23),
131         /* VAUX2 ... VSIM2 STBY and LOWPWR are on PCAP_REG_LOWPWR */
132         VREG_INFO(VAUX2, PCAP_REG_AUXVREG, 4,  5,  0,  1),
133         VREG_INFO(VAUX3, PCAP_REG_AUXVREG, 7,  8,  2,  3),
134         VREG_INFO(VAUX4, PCAP_REG_AUXVREG, 12, 13, 4,  5),
135         VREG_INFO(VSIM,  PCAP_REG_AUXVREG, 17, 18, NA, 6),
136         VREG_INFO(VSIM2, PCAP_REG_AUXVREG, 16, NA, NA, 7),
137         VREG_INFO(VVIB,  PCAP_REG_AUXVREG, 19, 20, NA, NA),
138 
139         VREG_INFO(SW1,   PCAP_REG_SWCTRL,  1,  2,  NA, NA),
140         VREG_INFO(SW2,   PCAP_REG_SWCTRL,  6,  7,  NA, NA),
141         /* SW3 STBY is on PCAP_REG_AUXVREG */
142         VREG_INFO(SW3,   PCAP_REG_SWCTRL,  11, 12, 24, NA),
143 
144         /* SWxS used to control SWx voltage on standby */
145 /*      VREG_INFO(SW1S,  PCAP_REG_LOWPWR,  NA, 12, NA, NA),
146         VREG_INFO(SW2S,  PCAP_REG_LOWPWR,  NA, 20, NA, NA), */
147 };
148 
149 static int pcap_regulator_set_voltage_sel(struct regulator_dev *rdev,
150                                           unsigned selector)
151 {
152         struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
153         void *pcap = rdev_get_drvdata(rdev);
154 
155         /* the regulator doesn't support voltage switching */
156         if (rdev->desc->n_voltages == 1)
157                 return -EINVAL;
158 
159         return ezx_pcap_set_bits(pcap, vreg->reg,
160                                  (rdev->desc->n_voltages - 1) << vreg->index,
161                                  selector << vreg->index);
162 }
163 
164 static int pcap_regulator_get_voltage_sel(struct regulator_dev *rdev)
165 {
166         struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
167         void *pcap = rdev_get_drvdata(rdev);
168         u32 tmp;
169 
170         if (rdev->desc->n_voltages == 1)
171                 return 0;
172 
173         ezx_pcap_read(pcap, vreg->reg, &tmp);
174         tmp = ((tmp >> vreg->index) & (rdev->desc->n_voltages - 1));
175         return tmp;
176 }
177 
178 static int pcap_regulator_enable(struct regulator_dev *rdev)
179 {
180         struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
181         void *pcap = rdev_get_drvdata(rdev);
182 
183         if (vreg->en == NA)
184                 return -EINVAL;
185 
186         return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 1 << vreg->en);
187 }
188 
189 static int pcap_regulator_disable(struct regulator_dev *rdev)
190 {
191         struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
192         void *pcap = rdev_get_drvdata(rdev);
193 
194         if (vreg->en == NA)
195                 return -EINVAL;
196 
197         return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 0);
198 }
199 
200 static int pcap_regulator_is_enabled(struct regulator_dev *rdev)
201 {
202         struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
203         void *pcap = rdev_get_drvdata(rdev);
204         u32 tmp;
205 
206         if (vreg->en == NA)
207                 return -EINVAL;
208 
209         ezx_pcap_read(pcap, vreg->reg, &tmp);
210         return (tmp >> vreg->en) & 1;
211 }
212 
213 static struct regulator_ops pcap_regulator_ops = {
214         .list_voltage   = regulator_list_voltage_table,
215         .set_voltage_sel = pcap_regulator_set_voltage_sel,
216         .get_voltage_sel = pcap_regulator_get_voltage_sel,
217         .enable         = pcap_regulator_enable,
218         .disable        = pcap_regulator_disable,
219         .is_enabled     = pcap_regulator_is_enabled,
220 };
221 
222 #define VREG(_vreg)                                             \
223         [_vreg] = {                                             \
224                 .name           = #_vreg,                       \
225                 .id             = _vreg,                        \
226                 .n_voltages     = ARRAY_SIZE(_vreg##_table),    \
227                 .volt_table     = _vreg##_table,                \
228                 .ops            = &pcap_regulator_ops,          \
229                 .type           = REGULATOR_VOLTAGE,            \
230                 .owner          = THIS_MODULE,                  \
231         }
232 
233 static const struct regulator_desc pcap_regulators[] = {
234         VREG(V1), VREG(V2), VREG(V3), VREG(V4), VREG(V5), VREG(V6), VREG(V7),
235         VREG(V8), VREG(V9), VREG(V10), VREG(VAUX1), VREG(VAUX2), VREG(VAUX3),
236         VREG(VAUX4), VREG(VSIM), VREG(VSIM2), VREG(VVIB), VREG(SW1), VREG(SW2),
237 };
238 
239 static int pcap_regulator_probe(struct platform_device *pdev)
240 {
241         struct regulator_dev *rdev;
242         void *pcap = dev_get_drvdata(pdev->dev.parent);
243         struct regulator_config config = { };
244 
245         config.dev = &pdev->dev;
246         config.init_data = dev_get_platdata(&pdev->dev);
247         config.driver_data = pcap;
248 
249         rdev = devm_regulator_register(&pdev->dev, &pcap_regulators[pdev->id],
250                                        &config);
251         if (IS_ERR(rdev))
252                 return PTR_ERR(rdev);
253 
254         platform_set_drvdata(pdev, rdev);
255 
256         return 0;
257 }
258 
259 static struct platform_driver pcap_regulator_driver = {
260         .driver = {
261                 .name   = "pcap-regulator",
262                 .owner  = THIS_MODULE,
263         },
264         .probe  = pcap_regulator_probe,
265 };
266 
267 static int __init pcap_regulator_init(void)
268 {
269         return platform_driver_register(&pcap_regulator_driver);
270 }
271 
272 static void __exit pcap_regulator_exit(void)
273 {
274         platform_driver_unregister(&pcap_regulator_driver);
275 }
276 
277 subsys_initcall(pcap_regulator_init);
278 module_exit(pcap_regulator_exit);
279 
280 MODULE_AUTHOR("Daniel Ribeiro <drwyrm@gmail.com>");
281 MODULE_DESCRIPTION("PCAP2 Regulator Driver");
282 MODULE_LICENSE("GPL");
283 

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