Commit | Line | Data |
---|---|---|
b5a82d62 AZ |
1 | /* |
2 | * An I2C driver for the Philips PCF8563 RTC | |
3 | * Copyright 2005-06 Tower Technologies | |
4 | * | |
5 | * Author: Alessandro Zummo <a.zummo@towertech.it> | |
6 | * Maintainers: http://www.nslu2-linux.org/ | |
7 | * | |
8 | * based on the other drivers in this same directory. | |
9 | * | |
10 | * http://www.semiconductors.philips.com/acrobat/datasheets/PCF8563-04.pdf | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/i2c.h> | |
18 | #include <linux/bcd.h> | |
19 | #include <linux/rtc.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
2113852b | 21 | #include <linux/module.h> |
8dccaf06 | 22 | #include <linux/of.h> |
23f809ee | 23 | #include <linux/err.h> |
b5a82d62 | 24 | |
e5fc9cc0 | 25 | #define DRV_VERSION "0.4.3" |
b5a82d62 AZ |
26 | |
27 | #define PCF8563_REG_ST1 0x00 /* status */ | |
28 | #define PCF8563_REG_ST2 0x01 | |
ede3e9d4 VD |
29 | #define PCF8563_BIT_AIE (1 << 1) |
30 | #define PCF8563_BIT_AF (1 << 3) | |
45ef0458 | 31 | #define PCF8563_BITS_ST2_N (7 << 5) |
b5a82d62 AZ |
32 | |
33 | #define PCF8563_REG_SC 0x02 /* datetime */ | |
34 | #define PCF8563_REG_MN 0x03 | |
35 | #define PCF8563_REG_HR 0x04 | |
36 | #define PCF8563_REG_DM 0x05 | |
37 | #define PCF8563_REG_DW 0x06 | |
38 | #define PCF8563_REG_MO 0x07 | |
39 | #define PCF8563_REG_YR 0x08 | |
40 | ||
41 | #define PCF8563_REG_AMN 0x09 /* alarm */ | |
b5a82d62 AZ |
42 | |
43 | #define PCF8563_REG_CLKO 0x0D /* clock out */ | |
44 | #define PCF8563_REG_TMRC 0x0E /* timer control */ | |
ff0bc501 JK |
45 | #define PCF8563_TMRC_ENABLE BIT(7) |
46 | #define PCF8563_TMRC_4096 0 | |
47 | #define PCF8563_TMRC_64 1 | |
48 | #define PCF8563_TMRC_1 2 | |
49 | #define PCF8563_TMRC_1_60 3 | |
50 | #define PCF8563_TMRC_MASK 3 | |
51 | ||
b5a82d62 AZ |
52 | #define PCF8563_REG_TMR 0x0F /* timer */ |
53 | ||
54 | #define PCF8563_SC_LV 0x80 /* low voltage */ | |
55 | #define PCF8563_MO_C 0x80 /* century */ | |
56 | ||
e5fc9cc0 AZ |
57 | static struct i2c_driver pcf8563_driver; |
58 | ||
cbb94502 | 59 | struct pcf8563 { |
e5fc9cc0 | 60 | struct rtc_device *rtc; |
cbb94502 AN |
61 | /* |
62 | * The meaning of MO_C bit varies by the chip type. | |
63 | * From PCF8563 datasheet: this bit is toggled when the years | |
64 | * register overflows from 99 to 00 | |
65 | * 0 indicates the century is 20xx | |
66 | * 1 indicates the century is 19xx | |
67 | * From RTC8564 datasheet: this bit indicates change of | |
68 | * century. When the year digit data overflows from 99 to 00, | |
69 | * this bit is set. By presetting it to 0 while still in the | |
70 | * 20th century, it will be set in year 2000, ... | |
71 | * There seems no reliable way to know how the system use this | |
72 | * bit. So let's do it heuristically, assuming we are live in | |
73 | * 1970...2069. | |
74 | */ | |
75 | int c_polarity; /* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */ | |
0f20b767 | 76 | int voltage_low; /* incicates if a low_voltage was detected */ |
ede3e9d4 VD |
77 | |
78 | struct i2c_client *client; | |
cbb94502 AN |
79 | }; |
80 | ||
2784366c VD |
81 | static int pcf8563_read_block_data(struct i2c_client *client, unsigned char reg, |
82 | unsigned char length, unsigned char *buf) | |
b5a82d62 | 83 | { |
b5a82d62 | 84 | struct i2c_msg msgs[] = { |
755e4a4b S |
85 | {/* setup read ptr */ |
86 | .addr = client->addr, | |
87 | .len = 1, | |
2784366c | 88 | .buf = ®, |
755e4a4b | 89 | }, |
2784366c | 90 | { |
755e4a4b S |
91 | .addr = client->addr, |
92 | .flags = I2C_M_RD, | |
2784366c | 93 | .len = length, |
755e4a4b S |
94 | .buf = buf |
95 | }, | |
b5a82d62 AZ |
96 | }; |
97 | ||
b5a82d62 | 98 | if ((i2c_transfer(client->adapter, msgs, 2)) != 2) { |
2a4e2b87 | 99 | dev_err(&client->dev, "%s: read error\n", __func__); |
b5a82d62 AZ |
100 | return -EIO; |
101 | } | |
102 | ||
2784366c VD |
103 | return 0; |
104 | } | |
105 | ||
106 | static int pcf8563_write_block_data(struct i2c_client *client, | |
107 | unsigned char reg, unsigned char length, | |
108 | unsigned char *buf) | |
109 | { | |
110 | int i, err; | |
111 | ||
112 | for (i = 0; i < length; i++) { | |
113 | unsigned char data[2] = { reg + i, buf[i] }; | |
114 | ||
115 | err = i2c_master_send(client, data, sizeof(data)); | |
116 | if (err != sizeof(data)) { | |
117 | dev_err(&client->dev, | |
118 | "%s: err=%d addr=%02x, data=%02x\n", | |
119 | __func__, err, data[0], data[1]); | |
120 | return -EIO; | |
121 | } | |
122 | } | |
123 | ||
124 | return 0; | |
125 | } | |
126 | ||
ede3e9d4 VD |
127 | static int pcf8563_set_alarm_mode(struct i2c_client *client, bool on) |
128 | { | |
17a1e5e8 | 129 | unsigned char buf; |
ede3e9d4 VD |
130 | int err; |
131 | ||
17a1e5e8 | 132 | err = pcf8563_read_block_data(client, PCF8563_REG_ST2, 1, &buf); |
ede3e9d4 VD |
133 | if (err < 0) |
134 | return err; | |
135 | ||
136 | if (on) | |
17a1e5e8 | 137 | buf |= PCF8563_BIT_AIE; |
ede3e9d4 | 138 | else |
17a1e5e8 | 139 | buf &= ~PCF8563_BIT_AIE; |
ede3e9d4 | 140 | |
45ef0458 | 141 | buf &= ~(PCF8563_BIT_AF | PCF8563_BITS_ST2_N); |
ede3e9d4 | 142 | |
17a1e5e8 | 143 | err = pcf8563_write_block_data(client, PCF8563_REG_ST2, 1, &buf); |
ede3e9d4 VD |
144 | if (err < 0) { |
145 | dev_err(&client->dev, "%s: write error\n", __func__); | |
146 | return -EIO; | |
147 | } | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | static int pcf8563_get_alarm_mode(struct i2c_client *client, unsigned char *en, | |
153 | unsigned char *pen) | |
154 | { | |
155 | unsigned char buf; | |
156 | int err; | |
157 | ||
158 | err = pcf8563_read_block_data(client, PCF8563_REG_ST2, 1, &buf); | |
159 | if (err) | |
160 | return err; | |
161 | ||
162 | if (en) | |
163 | *en = !!(buf & PCF8563_BIT_AIE); | |
164 | if (pen) | |
165 | *pen = !!(buf & PCF8563_BIT_AF); | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | static irqreturn_t pcf8563_irq(int irq, void *dev_id) | |
171 | { | |
172 | struct pcf8563 *pcf8563 = i2c_get_clientdata(dev_id); | |
173 | int err; | |
174 | char pending; | |
175 | ||
176 | err = pcf8563_get_alarm_mode(pcf8563->client, NULL, &pending); | |
e698a512 | 177 | if (err) |
3ff38237 | 178 | return IRQ_NONE; |
ede3e9d4 VD |
179 | |
180 | if (pending) { | |
181 | rtc_update_irq(pcf8563->rtc, 1, RTC_IRQF | RTC_AF); | |
182 | pcf8563_set_alarm_mode(pcf8563->client, 1); | |
183 | return IRQ_HANDLED; | |
184 | } | |
185 | ||
186 | return IRQ_NONE; | |
187 | } | |
188 | ||
2784366c VD |
189 | /* |
190 | * In the routines that deal directly with the pcf8563 hardware, we use | |
191 | * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch. | |
192 | */ | |
193 | static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm) | |
194 | { | |
195 | struct pcf8563 *pcf8563 = i2c_get_clientdata(client); | |
196 | unsigned char buf[9]; | |
197 | int err; | |
198 | ||
199 | err = pcf8563_read_block_data(client, PCF8563_REG_ST1, 9, buf); | |
200 | if (err) | |
201 | return err; | |
202 | ||
0f20b767 AS |
203 | if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) { |
204 | pcf8563->voltage_low = 1; | |
b5a82d62 AZ |
205 | dev_info(&client->dev, |
206 | "low voltage detected, date/time is not reliable.\n"); | |
0f20b767 | 207 | } |
b5a82d62 AZ |
208 | |
209 | dev_dbg(&client->dev, | |
210 | "%s: raw data is st1=%02x, st2=%02x, sec=%02x, min=%02x, hr=%02x, " | |
211 | "mday=%02x, wday=%02x, mon=%02x, year=%02x\n", | |
2a4e2b87 | 212 | __func__, |
b5a82d62 AZ |
213 | buf[0], buf[1], buf[2], buf[3], |
214 | buf[4], buf[5], buf[6], buf[7], | |
215 | buf[8]); | |
216 | ||
217 | ||
fe20ba70 AB |
218 | tm->tm_sec = bcd2bin(buf[PCF8563_REG_SC] & 0x7F); |
219 | tm->tm_min = bcd2bin(buf[PCF8563_REG_MN] & 0x7F); | |
220 | tm->tm_hour = bcd2bin(buf[PCF8563_REG_HR] & 0x3F); /* rtc hr 0-23 */ | |
221 | tm->tm_mday = bcd2bin(buf[PCF8563_REG_DM] & 0x3F); | |
b5a82d62 | 222 | tm->tm_wday = buf[PCF8563_REG_DW] & 0x07; |
fe20ba70 AB |
223 | tm->tm_mon = bcd2bin(buf[PCF8563_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */ |
224 | tm->tm_year = bcd2bin(buf[PCF8563_REG_YR]); | |
cbb94502 AN |
225 | if (tm->tm_year < 70) |
226 | tm->tm_year += 100; /* assume we are in 1970...2069 */ | |
227 | /* detect the polarity heuristically. see note above. */ | |
228 | pcf8563->c_polarity = (buf[PCF8563_REG_MO] & PCF8563_MO_C) ? | |
229 | (tm->tm_year >= 100) : (tm->tm_year < 100); | |
b5a82d62 AZ |
230 | |
231 | dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, " | |
232 | "mday=%d, mon=%d, year=%d, wday=%d\n", | |
2a4e2b87 | 233 | __func__, |
b5a82d62 AZ |
234 | tm->tm_sec, tm->tm_min, tm->tm_hour, |
235 | tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); | |
236 | ||
237 | /* the clock can give out invalid datetime, but we cannot return | |
238 | * -EINVAL otherwise hwclock will refuse to set the time on bootup. | |
239 | */ | |
240 | if (rtc_valid_tm(tm) < 0) | |
241 | dev_err(&client->dev, "retrieved date/time is not valid.\n"); | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm) | |
247 | { | |
e5fc9cc0 | 248 | struct pcf8563 *pcf8563 = i2c_get_clientdata(client); |
2784366c | 249 | int err; |
b5a82d62 AZ |
250 | unsigned char buf[9]; |
251 | ||
252 | dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, " | |
253 | "mday=%d, mon=%d, year=%d, wday=%d\n", | |
2a4e2b87 | 254 | __func__, |
b5a82d62 AZ |
255 | tm->tm_sec, tm->tm_min, tm->tm_hour, |
256 | tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); | |
257 | ||
258 | /* hours, minutes and seconds */ | |
fe20ba70 AB |
259 | buf[PCF8563_REG_SC] = bin2bcd(tm->tm_sec); |
260 | buf[PCF8563_REG_MN] = bin2bcd(tm->tm_min); | |
261 | buf[PCF8563_REG_HR] = bin2bcd(tm->tm_hour); | |
b5a82d62 | 262 | |
fe20ba70 | 263 | buf[PCF8563_REG_DM] = bin2bcd(tm->tm_mday); |
b5a82d62 AZ |
264 | |
265 | /* month, 1 - 12 */ | |
fe20ba70 | 266 | buf[PCF8563_REG_MO] = bin2bcd(tm->tm_mon + 1); |
b5a82d62 AZ |
267 | |
268 | /* year and century */ | |
fe20ba70 | 269 | buf[PCF8563_REG_YR] = bin2bcd(tm->tm_year % 100); |
cbb94502 | 270 | if (pcf8563->c_polarity ? (tm->tm_year >= 100) : (tm->tm_year < 100)) |
b5a82d62 AZ |
271 | buf[PCF8563_REG_MO] |= PCF8563_MO_C; |
272 | ||
273 | buf[PCF8563_REG_DW] = tm->tm_wday & 0x07; | |
274 | ||
2784366c VD |
275 | err = pcf8563_write_block_data(client, PCF8563_REG_SC, |
276 | 9 - PCF8563_REG_SC, buf + PCF8563_REG_SC); | |
277 | if (err) | |
278 | return err; | |
b5a82d62 AZ |
279 | |
280 | return 0; | |
281 | } | |
282 | ||
0f20b767 AS |
283 | #ifdef CONFIG_RTC_INTF_DEV |
284 | static int pcf8563_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) | |
285 | { | |
286 | struct pcf8563 *pcf8563 = i2c_get_clientdata(to_i2c_client(dev)); | |
287 | struct rtc_time tm; | |
288 | ||
289 | switch (cmd) { | |
290 | case RTC_VL_READ: | |
291 | if (pcf8563->voltage_low) | |
292 | dev_info(dev, "low voltage detected, date/time is not reliable.\n"); | |
293 | ||
294 | if (copy_to_user((void __user *)arg, &pcf8563->voltage_low, | |
295 | sizeof(int))) | |
296 | return -EFAULT; | |
297 | return 0; | |
298 | case RTC_VL_CLR: | |
299 | /* | |
300 | * Clear the VL bit in the seconds register in case | |
301 | * the time has not been set already (which would | |
302 | * have cleared it). This does not really matter | |
303 | * because of the cached voltage_low value but do it | |
304 | * anyway for consistency. | |
305 | */ | |
306 | if (pcf8563_get_datetime(to_i2c_client(dev), &tm)) | |
307 | pcf8563_set_datetime(to_i2c_client(dev), &tm); | |
308 | ||
309 | /* Clear the cached value. */ | |
310 | pcf8563->voltage_low = 0; | |
311 | ||
312 | return 0; | |
313 | default: | |
314 | return -ENOIOCTLCMD; | |
315 | } | |
316 | } | |
317 | #else | |
318 | #define pcf8563_rtc_ioctl NULL | |
319 | #endif | |
320 | ||
b5a82d62 AZ |
321 | static int pcf8563_rtc_read_time(struct device *dev, struct rtc_time *tm) |
322 | { | |
323 | return pcf8563_get_datetime(to_i2c_client(dev), tm); | |
324 | } | |
325 | ||
326 | static int pcf8563_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
327 | { | |
328 | return pcf8563_set_datetime(to_i2c_client(dev), tm); | |
329 | } | |
330 | ||
ede3e9d4 VD |
331 | static int pcf8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm) |
332 | { | |
333 | struct i2c_client *client = to_i2c_client(dev); | |
334 | unsigned char buf[4]; | |
335 | int err; | |
336 | ||
337 | err = pcf8563_read_block_data(client, PCF8563_REG_AMN, 4, buf); | |
338 | if (err) | |
339 | return err; | |
340 | ||
341 | dev_dbg(&client->dev, | |
342 | "%s: raw data is min=%02x, hr=%02x, mday=%02x, wday=%02x\n", | |
343 | __func__, buf[0], buf[1], buf[2], buf[3]); | |
344 | ||
345 | tm->time.tm_min = bcd2bin(buf[0] & 0x7F); | |
c7aef4f8 JK |
346 | tm->time.tm_hour = bcd2bin(buf[1] & 0x3F); |
347 | tm->time.tm_mday = bcd2bin(buf[2] & 0x3F); | |
ede3e9d4 VD |
348 | tm->time.tm_wday = bcd2bin(buf[3] & 0x7); |
349 | tm->time.tm_mon = -1; | |
350 | tm->time.tm_year = -1; | |
351 | tm->time.tm_yday = -1; | |
352 | tm->time.tm_isdst = -1; | |
353 | ||
354 | err = pcf8563_get_alarm_mode(client, &tm->enabled, &tm->pending); | |
355 | if (err < 0) | |
356 | return err; | |
357 | ||
358 | dev_dbg(&client->dev, "%s: tm is mins=%d, hours=%d, mday=%d, wday=%d," | |
359 | " enabled=%d, pending=%d\n", __func__, tm->time.tm_min, | |
360 | tm->time.tm_hour, tm->time.tm_mday, tm->time.tm_wday, | |
361 | tm->enabled, tm->pending); | |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
366 | static int pcf8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm) | |
367 | { | |
368 | struct i2c_client *client = to_i2c_client(dev); | |
369 | unsigned char buf[4]; | |
370 | int err; | |
599cda55 JK |
371 | unsigned long alarm_time; |
372 | ||
373 | /* The alarm has no seconds, round up to nearest minute */ | |
374 | if (tm->time.tm_sec) { | |
375 | rtc_tm_to_time(&tm->time, &alarm_time); | |
376 | alarm_time += 60-tm->time.tm_sec; | |
377 | rtc_time_to_tm(alarm_time, &tm->time); | |
378 | } | |
ede3e9d4 VD |
379 | |
380 | dev_dbg(dev, "%s, min=%d hour=%d wday=%d mday=%d " | |
381 | "enabled=%d pending=%d\n", __func__, | |
382 | tm->time.tm_min, tm->time.tm_hour, tm->time.tm_wday, | |
383 | tm->time.tm_mday, tm->enabled, tm->pending); | |
384 | ||
385 | buf[0] = bin2bcd(tm->time.tm_min); | |
386 | buf[1] = bin2bcd(tm->time.tm_hour); | |
387 | buf[2] = bin2bcd(tm->time.tm_mday); | |
388 | buf[3] = tm->time.tm_wday & 0x07; | |
389 | ||
390 | err = pcf8563_write_block_data(client, PCF8563_REG_AMN, 4, buf); | |
391 | if (err) | |
392 | return err; | |
393 | ||
394 | return pcf8563_set_alarm_mode(client, 1); | |
395 | } | |
396 | ||
397 | static int pcf8563_irq_enable(struct device *dev, unsigned int enabled) | |
398 | { | |
a45d528a | 399 | dev_dbg(dev, "%s: en=%d\n", __func__, enabled); |
ede3e9d4 VD |
400 | return pcf8563_set_alarm_mode(to_i2c_client(dev), !!enabled); |
401 | } | |
402 | ||
ff8371ac | 403 | static const struct rtc_class_ops pcf8563_rtc_ops = { |
0f20b767 | 404 | .ioctl = pcf8563_rtc_ioctl, |
b5a82d62 AZ |
405 | .read_time = pcf8563_rtc_read_time, |
406 | .set_time = pcf8563_rtc_set_time, | |
ede3e9d4 VD |
407 | .read_alarm = pcf8563_rtc_read_alarm, |
408 | .set_alarm = pcf8563_rtc_set_alarm, | |
409 | .alarm_irq_enable = pcf8563_irq_enable, | |
b5a82d62 AZ |
410 | }; |
411 | ||
d2653e92 JD |
412 | static int pcf8563_probe(struct i2c_client *client, |
413 | const struct i2c_device_id *id) | |
b5a82d62 | 414 | { |
cbb94502 | 415 | struct pcf8563 *pcf8563; |
ede3e9d4 | 416 | int err; |
ff0bc501 | 417 | unsigned char buf; |
a45d528a | 418 | unsigned char alm_pending; |
b5a82d62 | 419 | |
e5fc9cc0 | 420 | dev_dbg(&client->dev, "%s\n", __func__); |
b5a82d62 | 421 | |
e5fc9cc0 AZ |
422 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) |
423 | return -ENODEV; | |
b5a82d62 | 424 | |
d6fbdc34 JH |
425 | pcf8563 = devm_kzalloc(&client->dev, sizeof(struct pcf8563), |
426 | GFP_KERNEL); | |
e5fc9cc0 AZ |
427 | if (!pcf8563) |
428 | return -ENOMEM; | |
b5a82d62 | 429 | |
b5a82d62 AZ |
430 | dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); |
431 | ||
b74d2caa | 432 | i2c_set_clientdata(client, pcf8563); |
ede3e9d4 VD |
433 | pcf8563->client = client; |
434 | device_set_wakeup_capable(&client->dev, 1); | |
b74d2caa | 435 | |
ff0bc501 JK |
436 | /* Set timer to lowest frequency to save power (ref Haoyu datasheet) */ |
437 | buf = PCF8563_TMRC_1_60; | |
438 | err = pcf8563_write_block_data(client, PCF8563_REG_TMRC, 1, &buf); | |
439 | if (err < 0) { | |
440 | dev_err(&client->dev, "%s: write error\n", __func__); | |
441 | return err; | |
442 | } | |
443 | ||
a45d528a JK |
444 | err = pcf8563_get_alarm_mode(client, NULL, &alm_pending); |
445 | if (err < 0) { | |
446 | dev_err(&client->dev, "%s: read error\n", __func__); | |
447 | return err; | |
448 | } | |
449 | if (alm_pending) | |
450 | pcf8563_set_alarm_mode(client, 0); | |
451 | ||
d6fbdc34 JH |
452 | pcf8563->rtc = devm_rtc_device_register(&client->dev, |
453 | pcf8563_driver.driver.name, | |
454 | &pcf8563_rtc_ops, THIS_MODULE); | |
b5a82d62 | 455 | |
ede3e9d4 VD |
456 | if (IS_ERR(pcf8563->rtc)) |
457 | return PTR_ERR(pcf8563->rtc); | |
458 | ||
459 | if (client->irq > 0) { | |
460 | err = devm_request_threaded_irq(&client->dev, client->irq, | |
461 | NULL, pcf8563_irq, | |
462 | IRQF_SHARED|IRQF_ONESHOT|IRQF_TRIGGER_FALLING, | |
463 | pcf8563->rtc->name, client); | |
464 | if (err) { | |
465 | dev_err(&client->dev, "unable to request IRQ %d\n", | |
466 | client->irq); | |
467 | return err; | |
468 | } | |
469 | ||
470 | } | |
471 | ||
599cda55 JK |
472 | /* the pcf8563 alarm only supports a minute accuracy */ |
473 | pcf8563->rtc->uie_unsupported = 1; | |
474 | ||
ede3e9d4 | 475 | return 0; |
b5a82d62 AZ |
476 | } |
477 | ||
3760f736 JD |
478 | static const struct i2c_device_id pcf8563_id[] = { |
479 | { "pcf8563", 0 }, | |
8ea9212c | 480 | { "rtc8564", 0 }, |
3760f736 JD |
481 | { } |
482 | }; | |
483 | MODULE_DEVICE_TABLE(i2c, pcf8563_id); | |
484 | ||
8dccaf06 | 485 | #ifdef CONFIG_OF |
5a167f45 | 486 | static const struct of_device_id pcf8563_of_match[] = { |
8dccaf06 NB |
487 | { .compatible = "nxp,pcf8563" }, |
488 | {} | |
489 | }; | |
490 | MODULE_DEVICE_TABLE(of, pcf8563_of_match); | |
491 | #endif | |
492 | ||
e5fc9cc0 AZ |
493 | static struct i2c_driver pcf8563_driver = { |
494 | .driver = { | |
495 | .name = "rtc-pcf8563", | |
0a25bf40 | 496 | .owner = THIS_MODULE, |
8dccaf06 | 497 | .of_match_table = of_match_ptr(pcf8563_of_match), |
e5fc9cc0 AZ |
498 | }, |
499 | .probe = pcf8563_probe, | |
3760f736 | 500 | .id_table = pcf8563_id, |
e5fc9cc0 AZ |
501 | }; |
502 | ||
0abc9201 | 503 | module_i2c_driver(pcf8563_driver); |
b5a82d62 AZ |
504 | |
505 | MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); | |
506 | MODULE_DESCRIPTION("Philips PCF8563/Epson RTC8564 RTC driver"); | |
507 | MODULE_LICENSE("GPL"); | |
508 | MODULE_VERSION(DRV_VERSION); |