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f52046b1 BR |
1 | /* 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> | |
f52046b1 BR |
18 | #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> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
f52046b1 BR |
25 | |
26 | #include <linux/mfd/pcf50633/core.h> | |
27 | ||
f52046b1 BR |
28 | static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data) |
29 | { | |
30 | int ret; | |
31 | ||
32 | ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg, | |
33 | num, data); | |
34 | if (ret < 0) | |
35 | dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg); | |
36 | ||
37 | return ret; | |
38 | } | |
39 | ||
40 | static int __pcf50633_write(struct pcf50633 *pcf, u8 reg, int num, u8 *data) | |
41 | { | |
42 | int ret; | |
43 | ||
44 | ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg, | |
45 | num, data); | |
46 | if (ret < 0) | |
47 | dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg); | |
48 | ||
49 | return ret; | |
50 | ||
51 | } | |
52 | ||
53 | /* Read a block of upto 32 regs */ | |
54 | int pcf50633_read_block(struct pcf50633 *pcf, u8 reg, | |
55 | int nr_regs, u8 *data) | |
56 | { | |
57 | int ret; | |
58 | ||
59 | mutex_lock(&pcf->lock); | |
60 | ret = __pcf50633_read(pcf, reg, nr_regs, data); | |
61 | mutex_unlock(&pcf->lock); | |
62 | ||
63 | return ret; | |
64 | } | |
65 | EXPORT_SYMBOL_GPL(pcf50633_read_block); | |
66 | ||
67 | /* Write a block of upto 32 regs */ | |
68 | int pcf50633_write_block(struct pcf50633 *pcf , u8 reg, | |
69 | int nr_regs, u8 *data) | |
70 | { | |
71 | int ret; | |
72 | ||
73 | mutex_lock(&pcf->lock); | |
74 | ret = __pcf50633_write(pcf, reg, nr_regs, data); | |
75 | mutex_unlock(&pcf->lock); | |
76 | ||
77 | return ret; | |
78 | } | |
79 | EXPORT_SYMBOL_GPL(pcf50633_write_block); | |
80 | ||
81 | u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg) | |
82 | { | |
83 | u8 val; | |
84 | ||
85 | mutex_lock(&pcf->lock); | |
86 | __pcf50633_read(pcf, reg, 1, &val); | |
87 | mutex_unlock(&pcf->lock); | |
88 | ||
89 | return val; | |
90 | } | |
91 | EXPORT_SYMBOL_GPL(pcf50633_reg_read); | |
92 | ||
93 | int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val) | |
94 | { | |
95 | int ret; | |
96 | ||
97 | mutex_lock(&pcf->lock); | |
98 | ret = __pcf50633_write(pcf, reg, 1, &val); | |
99 | mutex_unlock(&pcf->lock); | |
100 | ||
101 | return ret; | |
102 | } | |
103 | EXPORT_SYMBOL_GPL(pcf50633_reg_write); | |
104 | ||
105 | int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val) | |
106 | { | |
107 | int ret; | |
108 | u8 tmp; | |
109 | ||
110 | val &= mask; | |
111 | ||
112 | mutex_lock(&pcf->lock); | |
113 | ret = __pcf50633_read(pcf, reg, 1, &tmp); | |
114 | if (ret < 0) | |
115 | goto out; | |
116 | ||
117 | tmp &= ~mask; | |
118 | tmp |= val; | |
119 | ret = __pcf50633_write(pcf, reg, 1, &tmp); | |
120 | ||
121 | out: | |
122 | mutex_unlock(&pcf->lock); | |
123 | ||
124 | return ret; | |
125 | } | |
126 | EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask); | |
127 | ||
128 | int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val) | |
129 | { | |
130 | int ret; | |
131 | u8 tmp; | |
132 | ||
133 | mutex_lock(&pcf->lock); | |
134 | ret = __pcf50633_read(pcf, reg, 1, &tmp); | |
135 | if (ret < 0) | |
136 | goto out; | |
137 | ||
138 | tmp &= ~val; | |
139 | ret = __pcf50633_write(pcf, reg, 1, &tmp); | |
140 | ||
141 | out: | |
142 | mutex_unlock(&pcf->lock); | |
143 | ||
144 | return ret; | |
145 | } | |
146 | EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits); | |
147 | ||
148 | /* sysfs attributes */ | |
149 | static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr, | |
150 | char *buf) | |
151 | { | |
152 | struct pcf50633 *pcf = dev_get_drvdata(dev); | |
153 | u8 dump[16]; | |
154 | int n, n1, idx = 0; | |
155 | char *buf1 = buf; | |
156 | static u8 address_no_read[] = { /* must be ascending */ | |
157 | PCF50633_REG_INT1, | |
158 | PCF50633_REG_INT2, | |
159 | PCF50633_REG_INT3, | |
160 | PCF50633_REG_INT4, | |
161 | PCF50633_REG_INT5, | |
162 | 0 /* terminator */ | |
163 | }; | |
164 | ||
165 | for (n = 0; n < 256; n += sizeof(dump)) { | |
166 | for (n1 = 0; n1 < sizeof(dump); n1++) | |
167 | if (n == address_no_read[idx]) { | |
168 | idx++; | |
169 | dump[n1] = 0x00; | |
170 | } else | |
171 | dump[n1] = pcf50633_reg_read(pcf, n + n1); | |
172 | ||
173 | hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0); | |
174 | buf1 += strlen(buf1); | |
175 | *buf1++ = '\n'; | |
176 | *buf1 = '\0'; | |
177 | } | |
178 | ||
179 | return buf1 - buf; | |
180 | } | |
181 | static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL); | |
182 | ||
183 | static ssize_t show_resume_reason(struct device *dev, | |
184 | struct device_attribute *attr, char *buf) | |
185 | { | |
186 | struct pcf50633 *pcf = dev_get_drvdata(dev); | |
187 | int n; | |
188 | ||
189 | n = sprintf(buf, "%02x%02x%02x%02x%02x\n", | |
190 | pcf->resume_reason[0], | |
191 | pcf->resume_reason[1], | |
192 | pcf->resume_reason[2], | |
193 | pcf->resume_reason[3], | |
194 | pcf->resume_reason[4]); | |
195 | ||
196 | return n; | |
197 | } | |
198 | static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL); | |
199 | ||
200 | static struct attribute *pcf_sysfs_entries[] = { | |
201 | &dev_attr_dump_regs.attr, | |
202 | &dev_attr_resume_reason.attr, | |
203 | NULL, | |
204 | }; | |
205 | ||
206 | static struct attribute_group pcf_attr_group = { | |
207 | .name = NULL, /* put in device directory */ | |
208 | .attrs = pcf_sysfs_entries, | |
209 | }; | |
210 | ||
f52046b1 BR |
211 | static void |
212 | pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name, | |
213 | struct platform_device **pdev) | |
214 | { | |
f52046b1 BR |
215 | int ret; |
216 | ||
217 | *pdev = platform_device_alloc(name, -1); | |
218 | if (!*pdev) { | |
219 | dev_err(pcf->dev, "Falied to allocate %s\n", name); | |
220 | return; | |
221 | } | |
222 | ||
f52046b1 BR |
223 | (*pdev)->dev.parent = pcf->dev; |
224 | ||
225 | ret = platform_device_add(*pdev); | |
226 | if (ret) { | |
227 | dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret); | |
228 | platform_device_put(*pdev); | |
229 | *pdev = NULL; | |
230 | } | |
231 | } | |
232 | ||
233 | #ifdef CONFIG_PM | |
25993e4e | 234 | static int pcf50633_suspend(struct i2c_client *client, pm_message_t state) |
f52046b1 BR |
235 | { |
236 | struct pcf50633 *pcf; | |
25993e4e | 237 | pcf = i2c_get_clientdata(client); |
f52046b1 | 238 | |
380c09f6 | 239 | return pcf50633_irq_suspend(pcf); |
f52046b1 BR |
240 | } |
241 | ||
25993e4e | 242 | static int pcf50633_resume(struct i2c_client *client) |
f52046b1 BR |
243 | { |
244 | struct pcf50633 *pcf; | |
25993e4e | 245 | pcf = i2c_get_clientdata(client); |
f52046b1 | 246 | |
380c09f6 | 247 | return pcf50633_irq_resume(pcf); |
f52046b1 BR |
248 | } |
249 | #else | |
250 | #define pcf50633_suspend NULL | |
251 | #define pcf50633_resume NULL | |
252 | #endif | |
253 | ||
254 | static int __devinit pcf50633_probe(struct i2c_client *client, | |
255 | const struct i2c_device_id *ids) | |
256 | { | |
257 | struct pcf50633 *pcf; | |
258 | struct pcf50633_platform_data *pdata = client->dev.platform_data; | |
24213ae1 | 259 | int i, ret; |
f52046b1 BR |
260 | int version, variant; |
261 | ||
24213ae1 LPC |
262 | if (!client->irq) { |
263 | dev_err(&client->dev, "Missing IRQ\n"); | |
264 | return -ENOENT; | |
265 | } | |
266 | ||
f52046b1 BR |
267 | pcf = kzalloc(sizeof(*pcf), GFP_KERNEL); |
268 | if (!pcf) | |
269 | return -ENOMEM; | |
270 | ||
271 | pcf->pdata = pdata; | |
272 | ||
273 | mutex_init(&pcf->lock); | |
274 | ||
275 | i2c_set_clientdata(client, pcf); | |
276 | pcf->dev = &client->dev; | |
277 | pcf->i2c_client = client; | |
f52046b1 BR |
278 | |
279 | version = pcf50633_reg_read(pcf, 0); | |
280 | variant = pcf50633_reg_read(pcf, 1); | |
281 | if (version < 0 || variant < 0) { | |
282 | dev_err(pcf->dev, "Unable to probe pcf50633\n"); | |
283 | ret = -ENODEV; | |
f7b2a77f | 284 | goto err_free; |
f52046b1 BR |
285 | } |
286 | ||
287 | dev_info(pcf->dev, "Probed device version %d variant %d\n", | |
288 | version, variant); | |
289 | ||
380c09f6 | 290 | pcf50633_irq_init(pcf, client->irq); |
24213ae1 | 291 | |
f52046b1 BR |
292 | /* Create sub devices */ |
293 | pcf50633_client_dev_register(pcf, "pcf50633-input", | |
294 | &pcf->input_pdev); | |
295 | pcf50633_client_dev_register(pcf, "pcf50633-rtc", | |
296 | &pcf->rtc_pdev); | |
297 | pcf50633_client_dev_register(pcf, "pcf50633-mbc", | |
298 | &pcf->mbc_pdev); | |
299 | pcf50633_client_dev_register(pcf, "pcf50633-adc", | |
300 | &pcf->adc_pdev); | |
f5bf403a LPC |
301 | pcf50633_client_dev_register(pcf, "pcf50633-backlight", |
302 | &pcf->bl_pdev); | |
303 | ||
f52046b1 BR |
304 | |
305 | for (i = 0; i < PCF50633_NUM_REGULATORS; i++) { | |
306 | struct platform_device *pdev; | |
307 | ||
308 | pdev = platform_device_alloc("pcf50633-regltr", i); | |
309 | if (!pdev) { | |
24213ae1 | 310 | dev_err(pcf->dev, "Cannot create regulator %d\n", i); |
f52046b1 BR |
311 | continue; |
312 | } | |
313 | ||
314 | pdev->dev.parent = pcf->dev; | |
bbb2e496 LPC |
315 | platform_device_add_data(pdev, &pdata->reg_init_data[i], |
316 | sizeof(pdata->reg_init_data[i])); | |
f52046b1 BR |
317 | pcf->regulator_pdev[i] = pdev; |
318 | ||
319 | platform_device_add(pdev); | |
320 | } | |
321 | ||
f52046b1 BR |
322 | ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group); |
323 | if (ret) | |
324 | dev_err(pcf->dev, "error creating sysfs entries\n"); | |
325 | ||
326 | if (pdata->probe_done) | |
327 | pdata->probe_done(pcf); | |
328 | ||
329 | return 0; | |
330 | ||
24213ae1 | 331 | err_free: |
f52046b1 | 332 | kfree(pcf); |
24213ae1 | 333 | |
f52046b1 BR |
334 | return ret; |
335 | } | |
336 | ||
337 | static int __devexit pcf50633_remove(struct i2c_client *client) | |
338 | { | |
339 | struct pcf50633 *pcf = i2c_get_clientdata(client); | |
340 | int i; | |
341 | ||
8220fe4c | 342 | sysfs_remove_group(&client->dev.kobj, &pcf_attr_group); |
380c09f6 | 343 | pcf50633_irq_free(pcf); |
f52046b1 BR |
344 | |
345 | platform_device_unregister(pcf->input_pdev); | |
346 | platform_device_unregister(pcf->rtc_pdev); | |
347 | platform_device_unregister(pcf->mbc_pdev); | |
348 | platform_device_unregister(pcf->adc_pdev); | |
8220fe4c | 349 | platform_device_unregister(pcf->bl_pdev); |
f52046b1 BR |
350 | |
351 | for (i = 0; i < PCF50633_NUM_REGULATORS; i++) | |
352 | platform_device_unregister(pcf->regulator_pdev[i]); | |
353 | ||
354 | kfree(pcf); | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
359 | static struct i2c_device_id pcf50633_id_table[] = { | |
360 | {"pcf50633", 0x73}, | |
8915e540 | 361 | {/* end of list */} |
f52046b1 BR |
362 | }; |
363 | ||
364 | static struct i2c_driver pcf50633_driver = { | |
365 | .driver = { | |
366 | .name = "pcf50633", | |
f52046b1 BR |
367 | }, |
368 | .id_table = pcf50633_id_table, | |
369 | .probe = pcf50633_probe, | |
370 | .remove = __devexit_p(pcf50633_remove), | |
25993e4e LPC |
371 | .suspend = pcf50633_suspend, |
372 | .resume = pcf50633_resume, | |
f52046b1 BR |
373 | }; |
374 | ||
375 | static int __init pcf50633_init(void) | |
376 | { | |
377 | return i2c_add_driver(&pcf50633_driver); | |
378 | } | |
379 | ||
380 | static void __exit pcf50633_exit(void) | |
381 | { | |
382 | i2c_del_driver(&pcf50633_driver); | |
383 | } | |
384 | ||
385 | MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU"); | |
386 | MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>"); | |
387 | MODULE_LICENSE("GPL"); | |
388 | ||
2021de87 | 389 | subsys_initcall(pcf50633_init); |
f52046b1 | 390 | module_exit(pcf50633_exit); |