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5adbaed1 ML |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Copyright (c) 2022 Nuvoton Technology Corporation | |
3 | ||
4 | #include <linux/bcd.h> | |
5 | #include <linux/clk-provider.h> | |
6 | #include <linux/err.h> | |
7 | #include <linux/i2c.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/of.h> | |
10 | #include <linux/rtc.h> | |
11 | #include <linux/slab.h> | |
12 | ||
13 | #define NCT3018Y_REG_SC 0x00 /* seconds */ | |
14 | #define NCT3018Y_REG_SCA 0x01 /* alarm */ | |
15 | #define NCT3018Y_REG_MN 0x02 | |
16 | #define NCT3018Y_REG_MNA 0x03 /* alarm */ | |
17 | #define NCT3018Y_REG_HR 0x04 | |
18 | #define NCT3018Y_REG_HRA 0x05 /* alarm */ | |
19 | #define NCT3018Y_REG_DW 0x06 | |
20 | #define NCT3018Y_REG_DM 0x07 | |
21 | #define NCT3018Y_REG_MO 0x08 | |
22 | #define NCT3018Y_REG_YR 0x09 | |
23 | #define NCT3018Y_REG_CTRL 0x0A /* timer control */ | |
24 | #define NCT3018Y_REG_ST 0x0B /* status */ | |
25 | #define NCT3018Y_REG_CLKO 0x0C /* clock out */ | |
26 | ||
27 | #define NCT3018Y_BIT_AF BIT(7) | |
28 | #define NCT3018Y_BIT_ST BIT(7) | |
29 | #define NCT3018Y_BIT_DM BIT(6) | |
30 | #define NCT3018Y_BIT_HF BIT(5) | |
31 | #define NCT3018Y_BIT_DSM BIT(4) | |
32 | #define NCT3018Y_BIT_AIE BIT(3) | |
33 | #define NCT3018Y_BIT_OFIE BIT(2) | |
34 | #define NCT3018Y_BIT_CIE BIT(1) | |
35 | #define NCT3018Y_BIT_TWO BIT(0) | |
36 | ||
37 | #define NCT3018Y_REG_BAT_MASK 0x07 | |
38 | #define NCT3018Y_REG_CLKO_F_MASK 0x03 /* frequenc mask */ | |
39 | #define NCT3018Y_REG_CLKO_CKE 0x80 /* clock out enabled */ | |
40 | ||
41 | struct nct3018y { | |
42 | struct rtc_device *rtc; | |
43 | struct i2c_client *client; | |
44 | #ifdef CONFIG_COMMON_CLK | |
45 | struct clk_hw clkout_hw; | |
46 | #endif | |
47 | }; | |
48 | ||
49 | static int nct3018y_set_alarm_mode(struct i2c_client *client, bool on) | |
50 | { | |
51 | int err, flags; | |
52 | ||
53 | dev_dbg(&client->dev, "%s:on:%d\n", __func__, on); | |
54 | ||
55 | flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_CTRL); | |
56 | if (flags < 0) { | |
57 | dev_dbg(&client->dev, | |
58 | "Failed to read NCT3018Y_REG_CTRL\n"); | |
59 | return flags; | |
60 | } | |
61 | ||
62 | if (on) | |
63 | flags |= NCT3018Y_BIT_AIE; | |
64 | else | |
65 | flags &= ~NCT3018Y_BIT_AIE; | |
66 | ||
67 | flags |= NCT3018Y_BIT_CIE; | |
68 | err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags); | |
69 | if (err < 0) { | |
70 | dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_CTRL\n"); | |
71 | return err; | |
72 | } | |
73 | ||
74 | flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_ST); | |
75 | if (flags < 0) { | |
76 | dev_dbg(&client->dev, | |
77 | "Failed to read NCT3018Y_REG_ST\n"); | |
78 | return flags; | |
79 | } | |
80 | ||
81 | flags &= ~(NCT3018Y_BIT_AF); | |
82 | err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_ST, flags); | |
83 | if (err < 0) { | |
84 | dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_ST\n"); | |
85 | return err; | |
86 | } | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | static int nct3018y_get_alarm_mode(struct i2c_client *client, unsigned char *alarm_enable, | |
92 | unsigned char *alarm_flag) | |
93 | { | |
94 | int flags; | |
95 | ||
96 | if (alarm_enable) { | |
97 | dev_dbg(&client->dev, "%s:NCT3018Y_REG_CTRL\n", __func__); | |
98 | flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_CTRL); | |
99 | if (flags < 0) | |
100 | return flags; | |
101 | *alarm_enable = flags & NCT3018Y_BIT_AIE; | |
102 | } | |
103 | ||
104 | if (alarm_flag) { | |
105 | dev_dbg(&client->dev, "%s:NCT3018Y_REG_ST\n", __func__); | |
106 | flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_ST); | |
107 | if (flags < 0) | |
108 | return flags; | |
109 | *alarm_flag = flags & NCT3018Y_BIT_AF; | |
110 | } | |
111 | ||
112 | dev_dbg(&client->dev, "%s:alarm_enable:%x alarm_flag:%x\n", | |
113 | __func__, *alarm_enable, *alarm_flag); | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | static irqreturn_t nct3018y_irq(int irq, void *dev_id) | |
119 | { | |
120 | struct nct3018y *nct3018y = i2c_get_clientdata(dev_id); | |
121 | struct i2c_client *client = nct3018y->client; | |
122 | int err; | |
123 | unsigned char alarm_flag; | |
124 | unsigned char alarm_enable; | |
125 | ||
126 | dev_dbg(&client->dev, "%s:irq:%d\n", __func__, irq); | |
127 | err = nct3018y_get_alarm_mode(nct3018y->client, &alarm_enable, &alarm_flag); | |
128 | if (err) | |
129 | return IRQ_NONE; | |
130 | ||
131 | if (alarm_flag) { | |
132 | dev_dbg(&client->dev, "%s:alarm flag:%x\n", | |
133 | __func__, alarm_flag); | |
134 | rtc_update_irq(nct3018y->rtc, 1, RTC_IRQF | RTC_AF); | |
135 | nct3018y_set_alarm_mode(nct3018y->client, 0); | |
136 | dev_dbg(&client->dev, "%s:IRQ_HANDLED\n", __func__); | |
137 | return IRQ_HANDLED; | |
138 | } | |
139 | ||
140 | return IRQ_NONE; | |
141 | } | |
142 | ||
143 | /* | |
144 | * In the routines that deal directly with the nct3018y hardware, we use | |
145 | * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch. | |
146 | */ | |
147 | static int nct3018y_rtc_read_time(struct device *dev, struct rtc_time *tm) | |
148 | { | |
149 | struct i2c_client *client = to_i2c_client(dev); | |
150 | unsigned char buf[10]; | |
151 | int err; | |
152 | ||
153 | err = i2c_smbus_read_i2c_block_data(client, NCT3018Y_REG_ST, 1, buf); | |
154 | if (err < 0) | |
155 | return err; | |
156 | ||
157 | if (!buf[0]) { | |
158 | dev_dbg(&client->dev, " voltage <=1.7, date/time is not reliable.\n"); | |
159 | return -EINVAL; | |
160 | } | |
161 | ||
162 | err = i2c_smbus_read_i2c_block_data(client, NCT3018Y_REG_SC, sizeof(buf), buf); | |
163 | if (err < 0) | |
164 | return err; | |
165 | ||
166 | tm->tm_sec = bcd2bin(buf[0] & 0x7F); | |
167 | tm->tm_min = bcd2bin(buf[2] & 0x7F); | |
168 | tm->tm_hour = bcd2bin(buf[4] & 0x3F); | |
169 | tm->tm_wday = buf[6] & 0x07; | |
170 | tm->tm_mday = bcd2bin(buf[7] & 0x3F); | |
171 | tm->tm_mon = bcd2bin(buf[8] & 0x1F) - 1; | |
172 | tm->tm_year = bcd2bin(buf[9]) + 100; | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | static int nct3018y_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
178 | { | |
179 | struct i2c_client *client = to_i2c_client(dev); | |
180 | unsigned char buf[4] = {0}; | |
181 | int err; | |
182 | ||
183 | buf[0] = bin2bcd(tm->tm_sec); | |
184 | err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_SC, buf[0]); | |
185 | if (err < 0) { | |
186 | dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_SC\n"); | |
187 | return err; | |
188 | } | |
189 | ||
190 | buf[0] = bin2bcd(tm->tm_min); | |
191 | err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_MN, buf[0]); | |
192 | if (err < 0) { | |
193 | dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_MN\n"); | |
194 | return err; | |
195 | } | |
196 | ||
197 | buf[0] = bin2bcd(tm->tm_hour); | |
198 | err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_HR, buf[0]); | |
199 | if (err < 0) { | |
200 | dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_HR\n"); | |
201 | return err; | |
202 | } | |
203 | ||
204 | buf[0] = tm->tm_wday & 0x07; | |
205 | buf[1] = bin2bcd(tm->tm_mday); | |
206 | buf[2] = bin2bcd(tm->tm_mon + 1); | |
207 | buf[3] = bin2bcd(tm->tm_year - 100); | |
208 | err = i2c_smbus_write_i2c_block_data(client, NCT3018Y_REG_DW, | |
209 | sizeof(buf), buf); | |
210 | if (err < 0) { | |
211 | dev_dbg(&client->dev, "Unable to write for day and mon and year\n"); | |
212 | return -EIO; | |
213 | } | |
214 | ||
215 | return err; | |
216 | } | |
217 | ||
218 | static int nct3018y_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm) | |
219 | { | |
220 | struct i2c_client *client = to_i2c_client(dev); | |
221 | unsigned char buf[5]; | |
222 | int err; | |
223 | ||
224 | err = i2c_smbus_read_i2c_block_data(client, NCT3018Y_REG_SCA, | |
225 | sizeof(buf), buf); | |
226 | if (err < 0) { | |
227 | dev_dbg(&client->dev, "Unable to read date\n"); | |
228 | return -EIO; | |
229 | } | |
230 | ||
231 | dev_dbg(&client->dev, "%s: raw data is sec=%02x, min=%02x hr=%02x\n", | |
232 | __func__, buf[0], buf[2], buf[4]); | |
233 | ||
234 | tm->time.tm_sec = bcd2bin(buf[0] & 0x7F); | |
235 | tm->time.tm_min = bcd2bin(buf[2] & 0x7F); | |
236 | tm->time.tm_hour = bcd2bin(buf[4] & 0x3F); | |
237 | ||
238 | err = nct3018y_get_alarm_mode(client, &tm->enabled, &tm->pending); | |
239 | if (err < 0) | |
240 | return err; | |
241 | ||
242 | dev_dbg(&client->dev, "%s:s=%d m=%d, hr=%d, enabled=%d, pending=%d\n", | |
243 | __func__, tm->time.tm_sec, tm->time.tm_min, | |
244 | tm->time.tm_hour, tm->enabled, tm->pending); | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | static int nct3018y_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm) | |
250 | { | |
251 | struct i2c_client *client = to_i2c_client(dev); | |
252 | int err; | |
253 | ||
254 | dev_dbg(dev, "%s, sec=%d, min=%d hour=%d tm->enabled:%d\n", | |
255 | __func__, tm->time.tm_sec, tm->time.tm_min, tm->time.tm_hour, | |
256 | tm->enabled); | |
257 | ||
258 | err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_SCA, bin2bcd(tm->time.tm_sec)); | |
259 | if (err < 0) { | |
260 | dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_SCA\n"); | |
261 | return err; | |
262 | } | |
263 | ||
264 | err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_MNA, bin2bcd(tm->time.tm_min)); | |
265 | if (err < 0) { | |
266 | dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_MNA\n"); | |
267 | return err; | |
268 | } | |
269 | ||
270 | err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_HRA, bin2bcd(tm->time.tm_hour)); | |
271 | if (err < 0) { | |
272 | dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_HRA\n"); | |
273 | return err; | |
274 | } | |
275 | ||
276 | return nct3018y_set_alarm_mode(client, tm->enabled); | |
277 | } | |
278 | ||
279 | static int nct3018y_irq_enable(struct device *dev, unsigned int enabled) | |
280 | { | |
281 | dev_dbg(dev, "%s: alarm enable=%d\n", __func__, enabled); | |
282 | ||
283 | return nct3018y_set_alarm_mode(to_i2c_client(dev), enabled); | |
284 | } | |
285 | ||
286 | static int nct3018y_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) | |
287 | { | |
288 | struct i2c_client *client = to_i2c_client(dev); | |
289 | int status, flags = 0; | |
290 | ||
291 | switch (cmd) { | |
292 | case RTC_VL_READ: | |
293 | status = i2c_smbus_read_byte_data(client, NCT3018Y_REG_ST); | |
294 | if (status < 0) | |
295 | return status; | |
296 | ||
297 | if (!(status & NCT3018Y_REG_BAT_MASK)) | |
298 | flags |= RTC_VL_DATA_INVALID; | |
299 | ||
300 | return put_user(flags, (unsigned int __user *)arg); | |
301 | ||
302 | default: | |
303 | return -ENOIOCTLCMD; | |
304 | } | |
305 | } | |
306 | ||
307 | #ifdef CONFIG_COMMON_CLK | |
308 | /* | |
309 | * Handling of the clkout | |
310 | */ | |
311 | ||
312 | #define clkout_hw_to_nct3018y(_hw) container_of(_hw, struct nct3018y, clkout_hw) | |
313 | ||
314 | static const int clkout_rates[] = { | |
315 | 32768, | |
316 | 1024, | |
317 | 32, | |
318 | 1, | |
319 | }; | |
320 | ||
321 | static unsigned long nct3018y_clkout_recalc_rate(struct clk_hw *hw, | |
322 | unsigned long parent_rate) | |
323 | { | |
324 | struct nct3018y *nct3018y = clkout_hw_to_nct3018y(hw); | |
325 | struct i2c_client *client = nct3018y->client; | |
326 | int flags; | |
327 | ||
328 | flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_CLKO); | |
329 | if (flags < 0) | |
330 | return 0; | |
331 | ||
332 | flags &= NCT3018Y_REG_CLKO_F_MASK; | |
333 | return clkout_rates[flags]; | |
334 | } | |
335 | ||
336 | static long nct3018y_clkout_round_rate(struct clk_hw *hw, unsigned long rate, | |
337 | unsigned long *prate) | |
338 | { | |
339 | int i; | |
340 | ||
341 | for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) | |
342 | if (clkout_rates[i] <= rate) | |
343 | return clkout_rates[i]; | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
348 | static int nct3018y_clkout_set_rate(struct clk_hw *hw, unsigned long rate, | |
349 | unsigned long parent_rate) | |
350 | { | |
351 | struct nct3018y *nct3018y = clkout_hw_to_nct3018y(hw); | |
352 | struct i2c_client *client = nct3018y->client; | |
353 | int i, flags; | |
354 | ||
355 | flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_CLKO); | |
356 | if (flags < 0) | |
357 | return flags; | |
358 | ||
359 | for (i = 0; i < ARRAY_SIZE(clkout_rates); i++) | |
360 | if (clkout_rates[i] == rate) { | |
361 | flags &= ~NCT3018Y_REG_CLKO_F_MASK; | |
362 | flags |= i; | |
363 | return i2c_smbus_write_byte_data(client, NCT3018Y_REG_CLKO, flags); | |
364 | } | |
365 | ||
366 | return -EINVAL; | |
367 | } | |
368 | ||
369 | static int nct3018y_clkout_control(struct clk_hw *hw, bool enable) | |
370 | { | |
371 | struct nct3018y *nct3018y = clkout_hw_to_nct3018y(hw); | |
372 | struct i2c_client *client = nct3018y->client; | |
373 | int flags; | |
374 | ||
375 | flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_CLKO); | |
376 | if (flags < 0) | |
377 | return flags; | |
378 | ||
379 | if (enable) | |
380 | flags |= NCT3018Y_REG_CLKO_CKE; | |
381 | else | |
382 | flags &= ~NCT3018Y_REG_CLKO_CKE; | |
383 | ||
384 | return i2c_smbus_write_byte_data(client, NCT3018Y_REG_CLKO, flags); | |
385 | } | |
386 | ||
387 | static int nct3018y_clkout_prepare(struct clk_hw *hw) | |
388 | { | |
389 | return nct3018y_clkout_control(hw, 1); | |
390 | } | |
391 | ||
392 | static void nct3018y_clkout_unprepare(struct clk_hw *hw) | |
393 | { | |
394 | nct3018y_clkout_control(hw, 0); | |
395 | } | |
396 | ||
397 | static int nct3018y_clkout_is_prepared(struct clk_hw *hw) | |
398 | { | |
399 | struct nct3018y *nct3018y = clkout_hw_to_nct3018y(hw); | |
400 | struct i2c_client *client = nct3018y->client; | |
401 | int flags; | |
402 | ||
403 | flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_CLKO); | |
404 | if (flags < 0) | |
405 | return flags; | |
406 | ||
407 | return flags & NCT3018Y_REG_CLKO_CKE; | |
408 | } | |
409 | ||
410 | static const struct clk_ops nct3018y_clkout_ops = { | |
411 | .prepare = nct3018y_clkout_prepare, | |
412 | .unprepare = nct3018y_clkout_unprepare, | |
413 | .is_prepared = nct3018y_clkout_is_prepared, | |
414 | .recalc_rate = nct3018y_clkout_recalc_rate, | |
415 | .round_rate = nct3018y_clkout_round_rate, | |
416 | .set_rate = nct3018y_clkout_set_rate, | |
417 | }; | |
418 | ||
419 | static struct clk *nct3018y_clkout_register_clk(struct nct3018y *nct3018y) | |
420 | { | |
421 | struct i2c_client *client = nct3018y->client; | |
422 | struct device_node *node = client->dev.of_node; | |
423 | struct clk *clk; | |
424 | struct clk_init_data init; | |
425 | ||
426 | init.name = "nct3018y-clkout"; | |
427 | init.ops = &nct3018y_clkout_ops; | |
428 | init.flags = 0; | |
429 | init.parent_names = NULL; | |
430 | init.num_parents = 0; | |
431 | nct3018y->clkout_hw.init = &init; | |
432 | ||
433 | /* optional override of the clockname */ | |
434 | of_property_read_string(node, "clock-output-names", &init.name); | |
435 | ||
436 | /* register the clock */ | |
437 | clk = devm_clk_register(&client->dev, &nct3018y->clkout_hw); | |
438 | ||
439 | if (!IS_ERR(clk)) | |
440 | of_clk_add_provider(node, of_clk_src_simple_get, clk); | |
441 | ||
442 | return clk; | |
443 | } | |
444 | #endif | |
445 | ||
446 | static const struct rtc_class_ops nct3018y_rtc_ops = { | |
447 | .read_time = nct3018y_rtc_read_time, | |
448 | .set_time = nct3018y_rtc_set_time, | |
449 | .read_alarm = nct3018y_rtc_read_alarm, | |
450 | .set_alarm = nct3018y_rtc_set_alarm, | |
451 | .alarm_irq_enable = nct3018y_irq_enable, | |
452 | .ioctl = nct3018y_ioctl, | |
453 | }; | |
454 | ||
c050dedb | 455 | static int nct3018y_probe(struct i2c_client *client) |
5adbaed1 ML |
456 | { |
457 | struct nct3018y *nct3018y; | |
458 | int err, flags; | |
459 | ||
460 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C | | |
461 | I2C_FUNC_SMBUS_BYTE | | |
462 | I2C_FUNC_SMBUS_BLOCK_DATA)) | |
463 | return -ENODEV; | |
464 | ||
465 | nct3018y = devm_kzalloc(&client->dev, sizeof(struct nct3018y), | |
466 | GFP_KERNEL); | |
467 | if (!nct3018y) | |
468 | return -ENOMEM; | |
469 | ||
470 | i2c_set_clientdata(client, nct3018y); | |
471 | nct3018y->client = client; | |
472 | device_set_wakeup_capable(&client->dev, 1); | |
473 | ||
474 | flags = i2c_smbus_read_byte_data(client, NCT3018Y_REG_CTRL); | |
475 | if (flags < 0) { | |
476 | dev_dbg(&client->dev, "%s: read error\n", __func__); | |
477 | return flags; | |
478 | } else if (flags & NCT3018Y_BIT_TWO) { | |
479 | dev_dbg(&client->dev, "%s: NCT3018Y_BIT_TWO is set\n", __func__); | |
480 | } | |
481 | ||
482 | flags = NCT3018Y_BIT_TWO; | |
483 | err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_CTRL, flags); | |
484 | if (err < 0) { | |
485 | dev_dbg(&client->dev, "Unable to write NCT3018Y_REG_CTRL\n"); | |
486 | return err; | |
487 | } | |
488 | ||
489 | flags = 0; | |
490 | err = i2c_smbus_write_byte_data(client, NCT3018Y_REG_ST, flags); | |
491 | if (err < 0) { | |
492 | dev_dbg(&client->dev, "%s: write error\n", __func__); | |
493 | return err; | |
494 | } | |
495 | ||
496 | nct3018y->rtc = devm_rtc_allocate_device(&client->dev); | |
497 | if (IS_ERR(nct3018y->rtc)) | |
498 | return PTR_ERR(nct3018y->rtc); | |
499 | ||
500 | nct3018y->rtc->ops = &nct3018y_rtc_ops; | |
501 | nct3018y->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000; | |
502 | nct3018y->rtc->range_max = RTC_TIMESTAMP_END_2099; | |
503 | ||
504 | if (client->irq > 0) { | |
505 | err = devm_request_threaded_irq(&client->dev, client->irq, | |
506 | NULL, nct3018y_irq, | |
507 | IRQF_ONESHOT | IRQF_TRIGGER_FALLING, | |
508 | "nct3018y", client); | |
509 | if (err) { | |
510 | dev_dbg(&client->dev, "unable to request IRQ %d\n", client->irq); | |
511 | return err; | |
512 | } | |
513 | } else { | |
514 | clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, nct3018y->rtc->features); | |
515 | clear_bit(RTC_FEATURE_ALARM, nct3018y->rtc->features); | |
516 | } | |
517 | ||
518 | #ifdef CONFIG_COMMON_CLK | |
519 | /* register clk in common clk framework */ | |
520 | nct3018y_clkout_register_clk(nct3018y); | |
521 | #endif | |
522 | ||
523 | return devm_rtc_register_device(nct3018y->rtc); | |
524 | } | |
525 | ||
526 | static const struct i2c_device_id nct3018y_id[] = { | |
527 | { "nct3018y", 0 }, | |
528 | { } | |
529 | }; | |
530 | MODULE_DEVICE_TABLE(i2c, nct3018y_id); | |
531 | ||
532 | static const struct of_device_id nct3018y_of_match[] = { | |
533 | { .compatible = "nuvoton,nct3018y" }, | |
534 | {} | |
535 | }; | |
536 | MODULE_DEVICE_TABLE(of, nct3018y_of_match); | |
537 | ||
538 | static struct i2c_driver nct3018y_driver = { | |
539 | .driver = { | |
540 | .name = "rtc-nct3018y", | |
541 | .of_match_table = of_match_ptr(nct3018y_of_match), | |
542 | }, | |
c050dedb | 543 | .probe_new = nct3018y_probe, |
5adbaed1 ML |
544 | .id_table = nct3018y_id, |
545 | }; | |
546 | ||
547 | module_i2c_driver(nct3018y_driver); | |
548 | ||
549 | MODULE_AUTHOR("Medad CChien <ctcchien@nuvoton.com>"); | |
550 | MODULE_AUTHOR("Mia Lin <mimi05633@gmail.com>"); | |
551 | MODULE_DESCRIPTION("Nuvoton NCT3018Y RTC driver"); | |
552 | MODULE_LICENSE("GPL"); |