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Balaji Raof52046b2009-01-09 01:49:01 +01001/* NXP PCF50633 Power Management Unit (PMU) driver
2 *
3 * (C) 2006-2008 by Openmoko, Inc.
4 * Author: Harald Welte <laforge@openmoko.org>
5 * Balaji Rao <balajirrao@openmoko.org>
6 * All rights reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/device.h>
17#include <linux/sysfs.h>
Balaji Raof52046b2009-01-09 01:49:01 +010018#include <linux/module.h>
19#include <linux/types.h>
20#include <linux/interrupt.h>
21#include <linux/workqueue.h>
22#include <linux/platform_device.h>
23#include <linux/i2c.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Balaji Raof52046b2009-01-09 01:49:01 +010025
26#include <linux/mfd/pcf50633/core.h>
27
Lars-Peter Clausen380c09f2010-05-12 02:10:56 +020028int pcf50633_irq_init(struct pcf50633 *pcf, int irq);
29void pcf50633_irq_free(struct pcf50633 *pcf);
30#ifdef CONFIG_PM
31int pcf50633_irq_suspend(struct pcf50633 *pcf);
32int pcf50633_irq_resume(struct pcf50633 *pcf);
33#endif
Balaji Raof52046b2009-01-09 01:49:01 +010034
35static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
36{
37 int ret;
38
39 ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg,
40 num, data);
41 if (ret < 0)
42 dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg);
43
44 return ret;
45}
46
47static int __pcf50633_write(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
48{
49 int ret;
50
51 ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg,
52 num, data);
53 if (ret < 0)
54 dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg);
55
56 return ret;
57
58}
59
60/* Read a block of upto 32 regs */
61int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
62 int nr_regs, u8 *data)
63{
64 int ret;
65
66 mutex_lock(&pcf->lock);
67 ret = __pcf50633_read(pcf, reg, nr_regs, data);
68 mutex_unlock(&pcf->lock);
69
70 return ret;
71}
72EXPORT_SYMBOL_GPL(pcf50633_read_block);
73
74/* Write a block of upto 32 regs */
75int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
76 int nr_regs, u8 *data)
77{
78 int ret;
79
80 mutex_lock(&pcf->lock);
81 ret = __pcf50633_write(pcf, reg, nr_regs, data);
82 mutex_unlock(&pcf->lock);
83
84 return ret;
85}
86EXPORT_SYMBOL_GPL(pcf50633_write_block);
87
88u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
89{
90 u8 val;
91
92 mutex_lock(&pcf->lock);
93 __pcf50633_read(pcf, reg, 1, &val);
94 mutex_unlock(&pcf->lock);
95
96 return val;
97}
98EXPORT_SYMBOL_GPL(pcf50633_reg_read);
99
100int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
101{
102 int ret;
103
104 mutex_lock(&pcf->lock);
105 ret = __pcf50633_write(pcf, reg, 1, &val);
106 mutex_unlock(&pcf->lock);
107
108 return ret;
109}
110EXPORT_SYMBOL_GPL(pcf50633_reg_write);
111
112int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
113{
114 int ret;
115 u8 tmp;
116
117 val &= mask;
118
119 mutex_lock(&pcf->lock);
120 ret = __pcf50633_read(pcf, reg, 1, &tmp);
121 if (ret < 0)
122 goto out;
123
124 tmp &= ~mask;
125 tmp |= val;
126 ret = __pcf50633_write(pcf, reg, 1, &tmp);
127
128out:
129 mutex_unlock(&pcf->lock);
130
131 return ret;
132}
133EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
134
135int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
136{
137 int ret;
138 u8 tmp;
139
140 mutex_lock(&pcf->lock);
141 ret = __pcf50633_read(pcf, reg, 1, &tmp);
142 if (ret < 0)
143 goto out;
144
145 tmp &= ~val;
146 ret = __pcf50633_write(pcf, reg, 1, &tmp);
147
148out:
149 mutex_unlock(&pcf->lock);
150
151 return ret;
152}
153EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
154
155/* sysfs attributes */
156static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
157 char *buf)
158{
159 struct pcf50633 *pcf = dev_get_drvdata(dev);
160 u8 dump[16];
161 int n, n1, idx = 0;
162 char *buf1 = buf;
163 static u8 address_no_read[] = { /* must be ascending */
164 PCF50633_REG_INT1,
165 PCF50633_REG_INT2,
166 PCF50633_REG_INT3,
167 PCF50633_REG_INT4,
168 PCF50633_REG_INT5,
169 0 /* terminator */
170 };
171
172 for (n = 0; n < 256; n += sizeof(dump)) {
173 for (n1 = 0; n1 < sizeof(dump); n1++)
174 if (n == address_no_read[idx]) {
175 idx++;
176 dump[n1] = 0x00;
177 } else
178 dump[n1] = pcf50633_reg_read(pcf, n + n1);
179
180 hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
181 buf1 += strlen(buf1);
182 *buf1++ = '\n';
183 *buf1 = '\0';
184 }
185
186 return buf1 - buf;
187}
188static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
189
190static ssize_t show_resume_reason(struct device *dev,
191 struct device_attribute *attr, char *buf)
192{
193 struct pcf50633 *pcf = dev_get_drvdata(dev);
194 int n;
195
196 n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
197 pcf->resume_reason[0],
198 pcf->resume_reason[1],
199 pcf->resume_reason[2],
200 pcf->resume_reason[3],
201 pcf->resume_reason[4]);
202
203 return n;
204}
205static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
206
207static struct attribute *pcf_sysfs_entries[] = {
208 &dev_attr_dump_regs.attr,
209 &dev_attr_resume_reason.attr,
210 NULL,
211};
212
213static struct attribute_group pcf_attr_group = {
214 .name = NULL, /* put in device directory */
215 .attrs = pcf_sysfs_entries,
216};
217
Balaji Raof52046b2009-01-09 01:49:01 +0100218static void
219pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
220 struct platform_device **pdev)
221{
Balaji Raof52046b2009-01-09 01:49:01 +0100222 int ret;
223
224 *pdev = platform_device_alloc(name, -1);
225 if (!*pdev) {
226 dev_err(pcf->dev, "Falied to allocate %s\n", name);
227 return;
228 }
229
Balaji Raof52046b2009-01-09 01:49:01 +0100230 (*pdev)->dev.parent = pcf->dev;
231
232 ret = platform_device_add(*pdev);
233 if (ret) {
234 dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
235 platform_device_put(*pdev);
236 *pdev = NULL;
237 }
238}
239
240#ifdef CONFIG_PM
Lars-Peter Clausen25993e42009-10-14 02:12:31 +0400241static int pcf50633_suspend(struct i2c_client *client, pm_message_t state)
Balaji Raof52046b2009-01-09 01:49:01 +0100242{
243 struct pcf50633 *pcf;
Lars-Peter Clausen25993e42009-10-14 02:12:31 +0400244 pcf = i2c_get_clientdata(client);
Balaji Raof52046b2009-01-09 01:49:01 +0100245
Lars-Peter Clausen380c09f2010-05-12 02:10:56 +0200246 return pcf50633_irq_suspend(pcf);
Balaji Raof52046b2009-01-09 01:49:01 +0100247}
248
Lars-Peter Clausen25993e42009-10-14 02:12:31 +0400249static int pcf50633_resume(struct i2c_client *client)
Balaji Raof52046b2009-01-09 01:49:01 +0100250{
251 struct pcf50633 *pcf;
Lars-Peter Clausen25993e42009-10-14 02:12:31 +0400252 pcf = i2c_get_clientdata(client);
Balaji Raof52046b2009-01-09 01:49:01 +0100253
Lars-Peter Clausen380c09f2010-05-12 02:10:56 +0200254 return pcf50633_irq_resume(pcf);
Balaji Raof52046b2009-01-09 01:49:01 +0100255}
256#else
257#define pcf50633_suspend NULL
258#define pcf50633_resume NULL
259#endif
260
261static int __devinit pcf50633_probe(struct i2c_client *client,
262 const struct i2c_device_id *ids)
263{
264 struct pcf50633 *pcf;
265 struct pcf50633_platform_data *pdata = client->dev.platform_data;
Lars-Peter Clausen24213ae2009-10-08 00:24:54 +0200266 int i, ret;
Balaji Raof52046b2009-01-09 01:49:01 +0100267 int version, variant;
268
Lars-Peter Clausen24213ae2009-10-08 00:24:54 +0200269 if (!client->irq) {
270 dev_err(&client->dev, "Missing IRQ\n");
271 return -ENOENT;
272 }
273
Balaji Raof52046b2009-01-09 01:49:01 +0100274 pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
275 if (!pcf)
276 return -ENOMEM;
277
278 pcf->pdata = pdata;
279
280 mutex_init(&pcf->lock);
281
282 i2c_set_clientdata(client, pcf);
283 pcf->dev = &client->dev;
284 pcf->i2c_client = client;
Balaji Raof52046b2009-01-09 01:49:01 +0100285
286 version = pcf50633_reg_read(pcf, 0);
287 variant = pcf50633_reg_read(pcf, 1);
288 if (version < 0 || variant < 0) {
289 dev_err(pcf->dev, "Unable to probe pcf50633\n");
290 ret = -ENODEV;
Lars-Peter Clausenf7b2a772010-05-12 02:10:55 +0200291 goto err_free;
Balaji Raof52046b2009-01-09 01:49:01 +0100292 }
293
294 dev_info(pcf->dev, "Probed device version %d variant %d\n",
295 version, variant);
296
Lars-Peter Clausen380c09f2010-05-12 02:10:56 +0200297 pcf50633_irq_init(pcf, client->irq);
Lars-Peter Clausen24213ae2009-10-08 00:24:54 +0200298
Balaji Raof52046b2009-01-09 01:49:01 +0100299 /* Create sub devices */
300 pcf50633_client_dev_register(pcf, "pcf50633-input",
301 &pcf->input_pdev);
302 pcf50633_client_dev_register(pcf, "pcf50633-rtc",
303 &pcf->rtc_pdev);
304 pcf50633_client_dev_register(pcf, "pcf50633-mbc",
305 &pcf->mbc_pdev);
306 pcf50633_client_dev_register(pcf, "pcf50633-adc",
307 &pcf->adc_pdev);
Lars-Peter Clausenf5bf4032010-05-12 02:44:33 +0200308 pcf50633_client_dev_register(pcf, "pcf50633-backlight",
309 &pcf->bl_pdev);
310
Balaji Raof52046b2009-01-09 01:49:01 +0100311
312 for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
313 struct platform_device *pdev;
314
315 pdev = platform_device_alloc("pcf50633-regltr", i);
316 if (!pdev) {
Lars-Peter Clausen24213ae2009-10-08 00:24:54 +0200317 dev_err(pcf->dev, "Cannot create regulator %d\n", i);
Balaji Raof52046b2009-01-09 01:49:01 +0100318 continue;
319 }
320
321 pdev->dev.parent = pcf->dev;
Lars-Peter Clausenbbb2e492009-10-14 02:12:35 +0400322 platform_device_add_data(pdev, &pdata->reg_init_data[i],
323 sizeof(pdata->reg_init_data[i]));
Balaji Raof52046b2009-01-09 01:49:01 +0100324 pcf->regulator_pdev[i] = pdev;
325
326 platform_device_add(pdev);
327 }
328
Balaji Raof52046b2009-01-09 01:49:01 +0100329 ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
330 if (ret)
331 dev_err(pcf->dev, "error creating sysfs entries\n");
332
333 if (pdata->probe_done)
334 pdata->probe_done(pcf);
335
336 return 0;
337
Lars-Peter Clausen24213ae2009-10-08 00:24:54 +0200338err_free:
Balaji Raof52046b2009-01-09 01:49:01 +0100339 kfree(pcf);
Lars-Peter Clausen24213ae2009-10-08 00:24:54 +0200340
Balaji Raof52046b2009-01-09 01:49:01 +0100341 return ret;
342}
343
344static int __devexit pcf50633_remove(struct i2c_client *client)
345{
346 struct pcf50633 *pcf = i2c_get_clientdata(client);
347 int i;
348
Lars-Peter Clausen380c09f2010-05-12 02:10:56 +0200349 pcf50633_irq_free(pcf);
Balaji Raof52046b2009-01-09 01:49:01 +0100350
351 platform_device_unregister(pcf->input_pdev);
352 platform_device_unregister(pcf->rtc_pdev);
353 platform_device_unregister(pcf->mbc_pdev);
354 platform_device_unregister(pcf->adc_pdev);
355
356 for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
357 platform_device_unregister(pcf->regulator_pdev[i]);
358
359 kfree(pcf);
360
361 return 0;
362}
363
364static struct i2c_device_id pcf50633_id_table[] = {
365 {"pcf50633", 0x73},
Jean Delvare8915e542009-02-17 09:07:02 +0100366 {/* end of list */}
Balaji Raof52046b2009-01-09 01:49:01 +0100367};
368
369static struct i2c_driver pcf50633_driver = {
370 .driver = {
371 .name = "pcf50633",
Balaji Raof52046b2009-01-09 01:49:01 +0100372 },
373 .id_table = pcf50633_id_table,
374 .probe = pcf50633_probe,
375 .remove = __devexit_p(pcf50633_remove),
Lars-Peter Clausen25993e42009-10-14 02:12:31 +0400376 .suspend = pcf50633_suspend,
377 .resume = pcf50633_resume,
Balaji Raof52046b2009-01-09 01:49:01 +0100378};
379
380static int __init pcf50633_init(void)
381{
382 return i2c_add_driver(&pcf50633_driver);
383}
384
385static void __exit pcf50633_exit(void)
386{
387 i2c_del_driver(&pcf50633_driver);
388}
389
390MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
391MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
392MODULE_LICENSE("GPL");
393
Samuel Ortiz2021de82009-06-15 18:04:54 +0200394subsys_initcall(pcf50633_init);
Balaji Raof52046b2009-01-09 01:49:01 +0100395module_exit(pcf50633_exit);