1 /* NXP PCF50633 PMIC Driver
3 * (C) 2006-2008 by Openmoko, Inc.
4 * Author: Balaji Rao <balajirrao@openmoko.org>
7 * Broken down from monstrous PCF50633 driver mainly by
8 * Harald Welte and Andy Green and Werner Almesberger
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/device.h>
21 #include <linux/err.h>
22 #include <linux/platform_device.h>
24 #include <linux/mfd/pcf50633/core.h>
25 #include <linux/mfd/pcf50633/pmic.h>
27 #define PCF50633_REGULATOR(_name, _id, _n) \
31 .ops = &pcf50633_regulator_ops, \
33 .type = REGULATOR_VOLTAGE, \
34 .owner = THIS_MODULE, \
37 static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
38 [PCF50633_REGULATOR_AUTO] = PCF50633_REG_AUTOOUT,
39 [PCF50633_REGULATOR_DOWN1] = PCF50633_REG_DOWN1OUT,
40 [PCF50633_REGULATOR_DOWN2] = PCF50633_REG_DOWN2OUT,
41 [PCF50633_REGULATOR_MEMLDO] = PCF50633_REG_MEMLDOOUT,
42 [PCF50633_REGULATOR_LDO1] = PCF50633_REG_LDO1OUT,
43 [PCF50633_REGULATOR_LDO2] = PCF50633_REG_LDO2OUT,
44 [PCF50633_REGULATOR_LDO3] = PCF50633_REG_LDO3OUT,
45 [PCF50633_REGULATOR_LDO4] = PCF50633_REG_LDO4OUT,
46 [PCF50633_REGULATOR_LDO5] = PCF50633_REG_LDO5OUT,
47 [PCF50633_REGULATOR_LDO6] = PCF50633_REG_LDO6OUT,
48 [PCF50633_REGULATOR_HCLDO] = PCF50633_REG_HCLDOOUT,
51 /* Bits from voltage value */
52 static u8 auto_voltage_bits(unsigned int millivolts)
54 if (millivolts < 1800)
56 if (millivolts > 3800)
61 return millivolts / 25;
64 static u8 down_voltage_bits(unsigned int millivolts)
68 else if (millivolts > 3000)
73 return millivolts / 25;
76 static u8 ldo_voltage_bits(unsigned int millivolts)
80 else if (millivolts > 3600)
84 return millivolts / 100;
87 /* Obtain voltage value from bits */
88 static unsigned int auto_voltage_value(u8 bits)
93 return 625 + (bits * 25);
97 static unsigned int down_voltage_value(u8 bits)
99 return 625 + (bits * 25);
103 static unsigned int ldo_voltage_value(u8 bits)
107 return 900 + (bits * 100);
110 static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev,
111 int min_uV, int max_uV,
114 struct pcf50633 *pcf;
115 int regulator_id, millivolts;
118 pcf = rdev_get_drvdata(rdev);
120 regulator_id = rdev_get_id(rdev);
121 if (regulator_id >= PCF50633_NUM_REGULATORS)
124 millivolts = min_uV / 1000;
126 regnr = pcf50633_regulator_registers[regulator_id];
128 switch (regulator_id) {
129 case PCF50633_REGULATOR_AUTO:
130 volt_bits = auto_voltage_bits(millivolts);
132 case PCF50633_REGULATOR_DOWN1:
133 volt_bits = down_voltage_bits(millivolts);
135 case PCF50633_REGULATOR_DOWN2:
136 volt_bits = down_voltage_bits(millivolts);
138 case PCF50633_REGULATOR_LDO1:
139 case PCF50633_REGULATOR_LDO2:
140 case PCF50633_REGULATOR_LDO3:
141 case PCF50633_REGULATOR_LDO4:
142 case PCF50633_REGULATOR_LDO5:
143 case PCF50633_REGULATOR_LDO6:
144 case PCF50633_REGULATOR_HCLDO:
145 case PCF50633_REGULATOR_MEMLDO:
146 volt_bits = ldo_voltage_bits(millivolts);
152 *selector = volt_bits;
154 return pcf50633_reg_write(pcf, regnr, volt_bits);
157 static int pcf50633_regulator_voltage_value(enum pcf50633_regulator_id id,
163 case PCF50633_REGULATOR_AUTO:
164 millivolts = auto_voltage_value(bits);
166 case PCF50633_REGULATOR_DOWN1:
167 millivolts = down_voltage_value(bits);
169 case PCF50633_REGULATOR_DOWN2:
170 millivolts = down_voltage_value(bits);
172 case PCF50633_REGULATOR_LDO1:
173 case PCF50633_REGULATOR_LDO2:
174 case PCF50633_REGULATOR_LDO3:
175 case PCF50633_REGULATOR_LDO4:
176 case PCF50633_REGULATOR_LDO5:
177 case PCF50633_REGULATOR_LDO6:
178 case PCF50633_REGULATOR_HCLDO:
179 case PCF50633_REGULATOR_MEMLDO:
180 millivolts = ldo_voltage_value(bits);
186 return millivolts * 1000;
189 static int pcf50633_regulator_get_voltage(struct regulator_dev *rdev)
191 struct pcf50633 *pcf;
195 pcf = rdev_get_drvdata(rdev);
197 regulator_id = rdev_get_id(rdev);
198 if (regulator_id >= PCF50633_NUM_REGULATORS)
201 regnr = pcf50633_regulator_registers[regulator_id];
203 volt_bits = pcf50633_reg_read(pcf, regnr);
205 return pcf50633_regulator_voltage_value(regulator_id, volt_bits);
208 static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
211 struct pcf50633 *pcf;
214 pcf = rdev_get_drvdata(rdev);
216 regulator_id = rdev_get_id(rdev);
218 switch (regulator_id) {
219 case PCF50633_REGULATOR_AUTO:
226 return pcf50633_regulator_voltage_value(regulator_id, index);
229 static int pcf50633_regulator_enable(struct regulator_dev *rdev)
231 struct pcf50633 *pcf = rdev_get_drvdata(rdev);
235 regulator_id = rdev_get_id(rdev);
236 if (regulator_id >= PCF50633_NUM_REGULATORS)
239 /* The *ENA register is always one after the *OUT register */
240 regnr = pcf50633_regulator_registers[regulator_id] + 1;
242 return pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON,
243 PCF50633_REGULATOR_ON);
246 static int pcf50633_regulator_disable(struct regulator_dev *rdev)
248 struct pcf50633 *pcf = rdev_get_drvdata(rdev);
252 regulator_id = rdev_get_id(rdev);
253 if (regulator_id >= PCF50633_NUM_REGULATORS)
256 /* the *ENA register is always one after the *OUT register */
257 regnr = pcf50633_regulator_registers[regulator_id] + 1;
259 return pcf50633_reg_set_bit_mask(pcf, regnr,
260 PCF50633_REGULATOR_ON, 0);
263 static int pcf50633_regulator_is_enabled(struct regulator_dev *rdev)
265 struct pcf50633 *pcf = rdev_get_drvdata(rdev);
266 int regulator_id = rdev_get_id(rdev);
269 regulator_id = rdev_get_id(rdev);
270 if (regulator_id >= PCF50633_NUM_REGULATORS)
273 /* the *ENA register is always one after the *OUT register */
274 regnr = pcf50633_regulator_registers[regulator_id] + 1;
276 return pcf50633_reg_read(pcf, regnr) & PCF50633_REGULATOR_ON;
279 static struct regulator_ops pcf50633_regulator_ops = {
280 .set_voltage = pcf50633_regulator_set_voltage,
281 .get_voltage = pcf50633_regulator_get_voltage,
282 .list_voltage = pcf50633_regulator_list_voltage,
283 .enable = pcf50633_regulator_enable,
284 .disable = pcf50633_regulator_disable,
285 .is_enabled = pcf50633_regulator_is_enabled,
288 static struct regulator_desc regulators[] = {
289 [PCF50633_REGULATOR_AUTO] =
290 PCF50633_REGULATOR("auto", PCF50633_REGULATOR_AUTO, 81),
291 [PCF50633_REGULATOR_DOWN1] =
292 PCF50633_REGULATOR("down1", PCF50633_REGULATOR_DOWN1, 96),
293 [PCF50633_REGULATOR_DOWN2] =
294 PCF50633_REGULATOR("down2", PCF50633_REGULATOR_DOWN2, 96),
295 [PCF50633_REGULATOR_LDO1] =
296 PCF50633_REGULATOR("ldo1", PCF50633_REGULATOR_LDO1, 28),
297 [PCF50633_REGULATOR_LDO2] =
298 PCF50633_REGULATOR("ldo2", PCF50633_REGULATOR_LDO2, 28),
299 [PCF50633_REGULATOR_LDO3] =
300 PCF50633_REGULATOR("ldo3", PCF50633_REGULATOR_LDO3, 28),
301 [PCF50633_REGULATOR_LDO4] =
302 PCF50633_REGULATOR("ldo4", PCF50633_REGULATOR_LDO4, 28),
303 [PCF50633_REGULATOR_LDO5] =
304 PCF50633_REGULATOR("ldo5", PCF50633_REGULATOR_LDO5, 28),
305 [PCF50633_REGULATOR_LDO6] =
306 PCF50633_REGULATOR("ldo6", PCF50633_REGULATOR_LDO6, 28),
307 [PCF50633_REGULATOR_HCLDO] =
308 PCF50633_REGULATOR("hcldo", PCF50633_REGULATOR_HCLDO, 28),
309 [PCF50633_REGULATOR_MEMLDO] =
310 PCF50633_REGULATOR("memldo", PCF50633_REGULATOR_MEMLDO, 28),
313 static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
315 struct regulator_dev *rdev;
316 struct pcf50633 *pcf;
318 /* Already set by core driver */
319 pcf = dev_to_pcf50633(pdev->dev.parent);
321 rdev = regulator_register(®ulators[pdev->id], &pdev->dev,
322 pdev->dev.platform_data, pcf, NULL);
324 return PTR_ERR(rdev);
326 platform_set_drvdata(pdev, rdev);
328 if (pcf->pdata->regulator_registered)
329 pcf->pdata->regulator_registered(pcf, pdev->id);
334 static int __devexit pcf50633_regulator_remove(struct platform_device *pdev)
336 struct regulator_dev *rdev = platform_get_drvdata(pdev);
338 platform_set_drvdata(pdev, NULL);
339 regulator_unregister(rdev);
344 static struct platform_driver pcf50633_regulator_driver = {
346 .name = "pcf50633-regltr",
348 .probe = pcf50633_regulator_probe,
349 .remove = __devexit_p(pcf50633_regulator_remove),
352 static int __init pcf50633_regulator_init(void)
354 return platform_driver_register(&pcf50633_regulator_driver);
356 subsys_initcall(pcf50633_regulator_init);
358 static void __exit pcf50633_regulator_exit(void)
360 platform_driver_unregister(&pcf50633_regulator_driver);
362 module_exit(pcf50633_regulator_exit);
364 MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
365 MODULE_DESCRIPTION("PCF50633 regulator driver");
366 MODULE_LICENSE("GPL");
367 MODULE_ALIAS("platform:pcf50633-regulator");