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1/*
2 * Real Time Clock driver for Freescale MC13XXX PMIC
3 *
4 * (C) 2009 Sascha Hauer, Pengutronix
5 * (C) 2009 Uwe Kleine-Koenig, Pengutronix
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/mfd/mc13xxx.h>
13#include <linux/platform_device.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/rtc.h>
18
19#define DRIVER_NAME "mc13xxx-rtc"
20
21#define MC13XXX_RTCTOD 20
22#define MC13XXX_RTCTODA 21
23#define MC13XXX_RTCDAY 22
24#define MC13XXX_RTCDAYA 23
25
26#define SEC_PER_DAY (24 * 60 * 60)
27
28struct mc13xxx_rtc {
29 struct rtc_device *rtc;
30 struct mc13xxx *mc13xxx;
31 int valid;
32};
33
34static int mc13xxx_rtc_irq_enable_unlocked(struct device *dev,
35 unsigned int enabled, int irq)
36{
37 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
38 int (*func)(struct mc13xxx *mc13xxx, int irq);
39
40 if (!priv->valid)
41 return -ENODATA;
42
43 func = enabled ? mc13xxx_irq_unmask : mc13xxx_irq_mask;
44 return func(priv->mc13xxx, irq);
45}
46
47static int mc13xxx_rtc_alarm_irq_enable(struct device *dev,
48 unsigned int enabled)
49{
50 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
51 int ret;
52
53 mc13xxx_lock(priv->mc13xxx);
54
55 ret = mc13xxx_rtc_irq_enable_unlocked(dev, enabled, MC13XXX_IRQ_TODA);
56
57 mc13xxx_unlock(priv->mc13xxx);
58
59 return ret;
60}
61
62static int mc13xxx_rtc_read_time(struct device *dev, struct rtc_time *tm)
63{
64 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
65 unsigned int seconds, days1, days2;
66
67 if (!priv->valid)
68 return -ENODATA;
69
70 do {
71 int ret;
72
73 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days1);
74 if (ret)
75 return ret;
76
77 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds);
78 if (ret)
79 return ret;
80
81 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days2);
82 if (ret)
83 return ret;
84 } while (days1 != days2);
85
86 rtc_time64_to_tm((time64_t)days1 * SEC_PER_DAY + seconds, tm);
87
88 return rtc_valid_tm(tm);
89}
90
91static int mc13xxx_rtc_set_mmss(struct device *dev, time64_t secs)
92{
93 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
94 unsigned int seconds, days;
95 unsigned int alarmseconds;
96 int ret;
97
98 days = div_s64_rem(secs, SEC_PER_DAY, &seconds);
99
100 mc13xxx_lock(priv->mc13xxx);
101
102 /*
103 * temporarily invalidate alarm to prevent triggering it when the day is
104 * already updated while the time isn't yet.
105 */
106 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &alarmseconds);
107 if (unlikely(ret))
108 goto out;
109
110 if (alarmseconds < SEC_PER_DAY) {
111 ret = mc13xxx_reg_write(priv->mc13xxx,
112 MC13XXX_RTCTODA, 0x1ffff);
113 if (unlikely(ret))
114 goto out;
115 }
116
117 /*
118 * write seconds=0 to prevent a day switch between writing days
119 * and seconds below
120 */
121 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, 0);
122 if (unlikely(ret))
123 goto out;
124
125 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAY, days);
126 if (unlikely(ret))
127 goto out;
128
129 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, seconds);
130 if (unlikely(ret))
131 goto out;
132
133 /* restore alarm */
134 if (alarmseconds < SEC_PER_DAY) {
135 ret = mc13xxx_reg_write(priv->mc13xxx,
136 MC13XXX_RTCTODA, alarmseconds);
137 if (unlikely(ret))
138 goto out;
139 }
140
141 if (!priv->valid) {
142 ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
143 if (unlikely(ret))
144 goto out;
145
146 ret = mc13xxx_irq_unmask(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
147 }
148
149out:
150 priv->valid = !ret;
151
152 mc13xxx_unlock(priv->mc13xxx);
153
154 return ret;
155}
156
157static int mc13xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
158{
159 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
160 unsigned seconds, days;
161 time64_t s1970;
162 int enabled, pending;
163 int ret;
164
165 mc13xxx_lock(priv->mc13xxx);
166
167 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &seconds);
168 if (unlikely(ret))
169 goto out;
170 if (seconds >= SEC_PER_DAY) {
171 ret = -ENODATA;
172 goto out;
173 }
174
175 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days);
176 if (unlikely(ret))
177 goto out;
178
179 ret = mc13xxx_irq_status(priv->mc13xxx, MC13XXX_IRQ_TODA,
180 &enabled, &pending);
181
182out:
183 mc13xxx_unlock(priv->mc13xxx);
184
185 if (ret)
186 return ret;
187
188 alarm->enabled = enabled;
189 alarm->pending = pending;
190
191 s1970 = (time64_t)days * SEC_PER_DAY + seconds;
192
193 rtc_time64_to_tm(s1970, &alarm->time);
194 dev_dbg(dev, "%s: %lld\n", __func__, (long long)s1970);
195
196 return 0;
197}
198
199static int mc13xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
200{
201 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
202 time64_t s1970;
203 u32 seconds, days;
204 int ret;
205
206 mc13xxx_lock(priv->mc13xxx);
207
208 /* disable alarm to prevent false triggering */
209 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, 0x1ffff);
210 if (unlikely(ret))
211 goto out;
212
213 ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_TODA);
214 if (unlikely(ret))
215 goto out;
216
217 s1970 = rtc_tm_to_time64(&alarm->time);
218
219 dev_dbg(dev, "%s: %s %lld\n", __func__, alarm->enabled ? "on" : "off",
220 (long long)s1970);
221
222 ret = mc13xxx_rtc_irq_enable_unlocked(dev, alarm->enabled,
223 MC13XXX_IRQ_TODA);
224 if (unlikely(ret))
225 goto out;
226
227 days = div_s64_rem(s1970, SEC_PER_DAY, &seconds);
228
229 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAYA, days);
230 if (unlikely(ret))
231 goto out;
232
233 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, seconds);
234
235out:
236 mc13xxx_unlock(priv->mc13xxx);
237
238 return ret;
239}
240
241static irqreturn_t mc13xxx_rtc_alarm_handler(int irq, void *dev)
242{
243 struct mc13xxx_rtc *priv = dev;
244 struct mc13xxx *mc13xxx = priv->mc13xxx;
245
246 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_AF);
247
248 mc13xxx_irq_ack(mc13xxx, irq);
249
250 return IRQ_HANDLED;
251}
252
253static irqreturn_t mc13xxx_rtc_update_handler(int irq, void *dev)
254{
255 struct mc13xxx_rtc *priv = dev;
256 struct mc13xxx *mc13xxx = priv->mc13xxx;
257
258 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_UF);
259
260 mc13xxx_irq_ack(mc13xxx, irq);
261
262 return IRQ_HANDLED;
263}
264
265static const struct rtc_class_ops mc13xxx_rtc_ops = {
266 .read_time = mc13xxx_rtc_read_time,
267 .set_mmss64 = mc13xxx_rtc_set_mmss,
268 .read_alarm = mc13xxx_rtc_read_alarm,
269 .set_alarm = mc13xxx_rtc_set_alarm,
270 .alarm_irq_enable = mc13xxx_rtc_alarm_irq_enable,
271};
272
273static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev)
274{
275 struct mc13xxx_rtc *priv = dev;
276 struct mc13xxx *mc13xxx = priv->mc13xxx;
277
278 priv->valid = 0;
279
280 mc13xxx_irq_mask(mc13xxx, irq);
281
282 return IRQ_HANDLED;
283}
284
285static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
286{
287 int ret;
288 struct mc13xxx_rtc *priv;
289 struct mc13xxx *mc13xxx;
290
291 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
292 if (!priv)
293 return -ENOMEM;
294
295 mc13xxx = dev_get_drvdata(pdev->dev.parent);
296 priv->mc13xxx = mc13xxx;
297 priv->valid = 1;
298
299 platform_set_drvdata(pdev, priv);
300
301 mc13xxx_lock(mc13xxx);
302
303 mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_RTCRST);
304
305 ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_RTCRST,
306 mc13xxx_rtc_reset_handler, DRIVER_NAME, priv);
307 if (ret)
308 goto err_irq_request;
309
310 ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_1HZ,
311 mc13xxx_rtc_update_handler, DRIVER_NAME, priv);
312 if (ret)
313 goto err_irq_request;
314
315 ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_TODA,
316 mc13xxx_rtc_alarm_handler, DRIVER_NAME, priv);
317 if (ret)
318 goto err_irq_request;
319
320 mc13xxx_unlock(mc13xxx);
321
322 priv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
323 &mc13xxx_rtc_ops, THIS_MODULE);
324
325 return 0;
326
327err_irq_request:
328 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_TODA, priv);
329 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_1HZ, priv);
330 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_RTCRST, priv);
331
332 mc13xxx_unlock(mc13xxx);
333
334 return ret;
335}
336
337static int mc13xxx_rtc_remove(struct platform_device *pdev)
338{
339 struct mc13xxx_rtc *priv = platform_get_drvdata(pdev);
340
341 mc13xxx_lock(priv->mc13xxx);
342
343 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TODA, priv);
344 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_1HZ, priv);
345 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_RTCRST, priv);
346
347 mc13xxx_unlock(priv->mc13xxx);
348
349 return 0;
350}
351
352static const struct platform_device_id mc13xxx_rtc_idtable[] = {
353 {
354 .name = "mc13783-rtc",
355 }, {
356 .name = "mc13892-rtc",
357 }, {
358 .name = "mc34708-rtc",
359 },
360 { /* sentinel */ }
361};
362MODULE_DEVICE_TABLE(platform, mc13xxx_rtc_idtable);
363
364static struct platform_driver mc13xxx_rtc_driver = {
365 .id_table = mc13xxx_rtc_idtable,
366 .remove = mc13xxx_rtc_remove,
367 .driver = {
368 .name = DRIVER_NAME,
369 },
370};
371
372module_platform_driver_probe(mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
373
374MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
375MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
376MODULE_LICENSE("GPL v2");
1/*
2 * Real Time Clock driver for Freescale MC13XXX PMIC
3 *
4 * (C) 2009 Sascha Hauer, Pengutronix
5 * (C) 2009 Uwe Kleine-Koenig, Pengutronix
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/mfd/mc13xxx.h>
13#include <linux/platform_device.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/rtc.h>
18
19#define DRIVER_NAME "mc13xxx-rtc"
20
21#define MC13XXX_RTCTOD 20
22#define MC13XXX_RTCTODA 21
23#define MC13XXX_RTCDAY 22
24#define MC13XXX_RTCDAYA 23
25
26#define SEC_PER_DAY (24 * 60 * 60)
27
28struct mc13xxx_rtc {
29 struct rtc_device *rtc;
30 struct mc13xxx *mc13xxx;
31 int valid;
32};
33
34static int mc13xxx_rtc_irq_enable_unlocked(struct device *dev,
35 unsigned int enabled, int irq)
36{
37 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
38 int (*func)(struct mc13xxx *mc13xxx, int irq);
39
40 if (!priv->valid)
41 return -ENODATA;
42
43 func = enabled ? mc13xxx_irq_unmask : mc13xxx_irq_mask;
44 return func(priv->mc13xxx, irq);
45}
46
47static int mc13xxx_rtc_alarm_irq_enable(struct device *dev,
48 unsigned int enabled)
49{
50 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
51 int ret;
52
53 mc13xxx_lock(priv->mc13xxx);
54
55 ret = mc13xxx_rtc_irq_enable_unlocked(dev, enabled, MC13XXX_IRQ_TODA);
56
57 mc13xxx_unlock(priv->mc13xxx);
58
59 return ret;
60}
61
62static int mc13xxx_rtc_read_time(struct device *dev, struct rtc_time *tm)
63{
64 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
65 unsigned int seconds, days1, days2;
66
67 if (!priv->valid)
68 return -ENODATA;
69
70 do {
71 int ret;
72
73 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days1);
74 if (ret)
75 return ret;
76
77 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds);
78 if (ret)
79 return ret;
80
81 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days2);
82 if (ret)
83 return ret;
84 } while (days1 != days2);
85
86 rtc_time_to_tm(days1 * SEC_PER_DAY + seconds, tm);
87
88 return rtc_valid_tm(tm);
89}
90
91static int mc13xxx_rtc_set_mmss(struct device *dev, unsigned long secs)
92{
93 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
94 unsigned int seconds, days;
95 unsigned int alarmseconds;
96 int ret;
97
98 seconds = secs % SEC_PER_DAY;
99 days = secs / SEC_PER_DAY;
100
101 mc13xxx_lock(priv->mc13xxx);
102
103 /*
104 * temporarily invalidate alarm to prevent triggering it when the day is
105 * already updated while the time isn't yet.
106 */
107 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &alarmseconds);
108 if (unlikely(ret))
109 goto out;
110
111 if (alarmseconds < SEC_PER_DAY) {
112 ret = mc13xxx_reg_write(priv->mc13xxx,
113 MC13XXX_RTCTODA, 0x1ffff);
114 if (unlikely(ret))
115 goto out;
116 }
117
118 /*
119 * write seconds=0 to prevent a day switch between writing days
120 * and seconds below
121 */
122 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, 0);
123 if (unlikely(ret))
124 goto out;
125
126 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAY, days);
127 if (unlikely(ret))
128 goto out;
129
130 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, seconds);
131 if (unlikely(ret))
132 goto out;
133
134 /* restore alarm */
135 if (alarmseconds < SEC_PER_DAY) {
136 ret = mc13xxx_reg_write(priv->mc13xxx,
137 MC13XXX_RTCTODA, alarmseconds);
138 if (unlikely(ret))
139 goto out;
140 }
141
142 if (!priv->valid) {
143 ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
144 if (unlikely(ret))
145 goto out;
146
147 ret = mc13xxx_irq_unmask(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
148 }
149
150out:
151 priv->valid = !ret;
152
153 mc13xxx_unlock(priv->mc13xxx);
154
155 return ret;
156}
157
158static int mc13xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
159{
160 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
161 unsigned seconds, days;
162 unsigned long s1970;
163 int enabled, pending;
164 int ret;
165
166 mc13xxx_lock(priv->mc13xxx);
167
168 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &seconds);
169 if (unlikely(ret))
170 goto out;
171 if (seconds >= SEC_PER_DAY) {
172 ret = -ENODATA;
173 goto out;
174 }
175
176 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days);
177 if (unlikely(ret))
178 goto out;
179
180 ret = mc13xxx_irq_status(priv->mc13xxx, MC13XXX_IRQ_TODA,
181 &enabled, &pending);
182
183out:
184 mc13xxx_unlock(priv->mc13xxx);
185
186 if (ret)
187 return ret;
188
189 alarm->enabled = enabled;
190 alarm->pending = pending;
191
192 s1970 = days * SEC_PER_DAY + seconds;
193
194 rtc_time_to_tm(s1970, &alarm->time);
195 dev_dbg(dev, "%s: %lu\n", __func__, s1970);
196
197 return 0;
198}
199
200static int mc13xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
201{
202 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
203 unsigned long s1970;
204 unsigned seconds, days;
205 int ret;
206
207 mc13xxx_lock(priv->mc13xxx);
208
209 /* disable alarm to prevent false triggering */
210 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, 0x1ffff);
211 if (unlikely(ret))
212 goto out;
213
214 ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_TODA);
215 if (unlikely(ret))
216 goto out;
217
218 ret = rtc_tm_to_time(&alarm->time, &s1970);
219 if (unlikely(ret))
220 goto out;
221
222 dev_dbg(dev, "%s: o%2.s %lu\n", __func__, alarm->enabled ? "n" : "ff",
223 s1970);
224
225 ret = mc13xxx_rtc_irq_enable_unlocked(dev, alarm->enabled,
226 MC13XXX_IRQ_TODA);
227 if (unlikely(ret))
228 goto out;
229
230 seconds = s1970 % SEC_PER_DAY;
231 days = s1970 / SEC_PER_DAY;
232
233 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAYA, days);
234 if (unlikely(ret))
235 goto out;
236
237 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, seconds);
238
239out:
240 mc13xxx_unlock(priv->mc13xxx);
241
242 return ret;
243}
244
245static irqreturn_t mc13xxx_rtc_alarm_handler(int irq, void *dev)
246{
247 struct mc13xxx_rtc *priv = dev;
248 struct mc13xxx *mc13xxx = priv->mc13xxx;
249
250 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_AF);
251
252 mc13xxx_irq_ack(mc13xxx, irq);
253
254 return IRQ_HANDLED;
255}
256
257static irqreturn_t mc13xxx_rtc_update_handler(int irq, void *dev)
258{
259 struct mc13xxx_rtc *priv = dev;
260 struct mc13xxx *mc13xxx = priv->mc13xxx;
261
262 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_UF);
263
264 mc13xxx_irq_ack(mc13xxx, irq);
265
266 return IRQ_HANDLED;
267}
268
269static const struct rtc_class_ops mc13xxx_rtc_ops = {
270 .read_time = mc13xxx_rtc_read_time,
271 .set_mmss = mc13xxx_rtc_set_mmss,
272 .read_alarm = mc13xxx_rtc_read_alarm,
273 .set_alarm = mc13xxx_rtc_set_alarm,
274 .alarm_irq_enable = mc13xxx_rtc_alarm_irq_enable,
275};
276
277static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev)
278{
279 struct mc13xxx_rtc *priv = dev;
280 struct mc13xxx *mc13xxx = priv->mc13xxx;
281
282 priv->valid = 0;
283
284 mc13xxx_irq_mask(mc13xxx, irq);
285
286 return IRQ_HANDLED;
287}
288
289static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
290{
291 int ret;
292 struct mc13xxx_rtc *priv;
293 struct mc13xxx *mc13xxx;
294
295 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
296 if (!priv)
297 return -ENOMEM;
298
299 mc13xxx = dev_get_drvdata(pdev->dev.parent);
300 priv->mc13xxx = mc13xxx;
301 priv->valid = 1;
302
303 platform_set_drvdata(pdev, priv);
304
305 mc13xxx_lock(mc13xxx);
306
307 mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_RTCRST);
308
309 ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_RTCRST,
310 mc13xxx_rtc_reset_handler, DRIVER_NAME, priv);
311 if (ret)
312 goto err_irq_request;
313
314 ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_1HZ,
315 mc13xxx_rtc_update_handler, DRIVER_NAME, priv);
316 if (ret)
317 goto err_irq_request;
318
319 ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_TODA,
320 mc13xxx_rtc_alarm_handler, DRIVER_NAME, priv);
321 if (ret)
322 goto err_irq_request;
323
324 mc13xxx_unlock(mc13xxx);
325
326 priv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
327 &mc13xxx_rtc_ops, THIS_MODULE);
328
329 return 0;
330
331err_irq_request:
332 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_TODA, priv);
333 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_1HZ, priv);
334 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_RTCRST, priv);
335
336 mc13xxx_unlock(mc13xxx);
337
338 return ret;
339}
340
341static int mc13xxx_rtc_remove(struct platform_device *pdev)
342{
343 struct mc13xxx_rtc *priv = platform_get_drvdata(pdev);
344
345 mc13xxx_lock(priv->mc13xxx);
346
347 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TODA, priv);
348 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_1HZ, priv);
349 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_RTCRST, priv);
350
351 mc13xxx_unlock(priv->mc13xxx);
352
353 return 0;
354}
355
356static const struct platform_device_id mc13xxx_rtc_idtable[] = {
357 {
358 .name = "mc13783-rtc",
359 }, {
360 .name = "mc13892-rtc",
361 }, {
362 .name = "mc34708-rtc",
363 },
364 { /* sentinel */ }
365};
366MODULE_DEVICE_TABLE(platform, mc13xxx_rtc_idtable);
367
368static struct platform_driver mc13xxx_rtc_driver = {
369 .id_table = mc13xxx_rtc_idtable,
370 .remove = mc13xxx_rtc_remove,
371 .driver = {
372 .name = DRIVER_NAME,
373 .owner = THIS_MODULE,
374 },
375};
376
377module_platform_driver_probe(mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
378
379MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
380MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
381MODULE_LICENSE("GPL v2");