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");