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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Real Time Clock driver for Freescale MC13XXX PMIC
4 *
5 * (C) 2009 Sascha Hauer, Pengutronix
6 * (C) 2009 Uwe Kleine-Koenig, Pengutronix
7 */
8
9#include <linux/mfd/mc13xxx.h>
10#include <linux/platform_device.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/mod_devicetable.h>
14#include <linux/slab.h>
15#include <linux/rtc.h>
16
17#define DRIVER_NAME "mc13xxx-rtc"
18
19#define MC13XXX_RTCTOD 20
20#define MC13XXX_RTCTODA 21
21#define MC13XXX_RTCDAY 22
22#define MC13XXX_RTCDAYA 23
23
24#define SEC_PER_DAY (24 * 60 * 60)
25
26struct mc13xxx_rtc {
27 struct rtc_device *rtc;
28 struct mc13xxx *mc13xxx;
29 int valid;
30};
31
32static int mc13xxx_rtc_irq_enable_unlocked(struct device *dev,
33 unsigned int enabled, int irq)
34{
35 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
36 int (*func)(struct mc13xxx *mc13xxx, int irq);
37
38 if (!priv->valid)
39 return -ENODATA;
40
41 func = enabled ? mc13xxx_irq_unmask : mc13xxx_irq_mask;
42 return func(priv->mc13xxx, irq);
43}
44
45static int mc13xxx_rtc_alarm_irq_enable(struct device *dev,
46 unsigned int enabled)
47{
48 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
49 int ret;
50
51 mc13xxx_lock(priv->mc13xxx);
52
53 ret = mc13xxx_rtc_irq_enable_unlocked(dev, enabled, MC13XXX_IRQ_TODA);
54
55 mc13xxx_unlock(priv->mc13xxx);
56
57 return ret;
58}
59
60static int mc13xxx_rtc_read_time(struct device *dev, struct rtc_time *tm)
61{
62 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
63 unsigned int seconds, days1, days2;
64
65 if (!priv->valid)
66 return -ENODATA;
67
68 do {
69 int ret;
70
71 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days1);
72 if (ret)
73 return ret;
74
75 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds);
76 if (ret)
77 return ret;
78
79 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days2);
80 if (ret)
81 return ret;
82 } while (days1 != days2);
83
84 rtc_time64_to_tm((time64_t)days1 * SEC_PER_DAY + seconds, tm);
85
86 return 0;
87}
88
89static int mc13xxx_rtc_set_time(struct device *dev, struct rtc_time *tm)
90{
91 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
92 unsigned int seconds, days;
93 unsigned int alarmseconds;
94 int ret;
95
96 days = div_s64_rem(rtc_tm_to_time64(tm), SEC_PER_DAY, &seconds);
97
98 mc13xxx_lock(priv->mc13xxx);
99
100 /*
101 * temporarily invalidate alarm to prevent triggering it when the day is
102 * already updated while the time isn't yet.
103 */
104 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &alarmseconds);
105 if (unlikely(ret))
106 goto out;
107
108 if (alarmseconds < SEC_PER_DAY) {
109 ret = mc13xxx_reg_write(priv->mc13xxx,
110 MC13XXX_RTCTODA, 0x1ffff);
111 if (unlikely(ret))
112 goto out;
113 }
114
115 /*
116 * write seconds=0 to prevent a day switch between writing days
117 * and seconds below
118 */
119 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, 0);
120 if (unlikely(ret))
121 goto out;
122
123 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAY, days);
124 if (unlikely(ret))
125 goto out;
126
127 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, seconds);
128 if (unlikely(ret))
129 goto out;
130
131 /* restore alarm */
132 if (alarmseconds < SEC_PER_DAY) {
133 ret = mc13xxx_reg_write(priv->mc13xxx,
134 MC13XXX_RTCTODA, alarmseconds);
135 if (unlikely(ret))
136 goto out;
137 }
138
139 if (!priv->valid) {
140 ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
141 if (unlikely(ret))
142 goto out;
143
144 ret = mc13xxx_irq_unmask(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
145 }
146
147out:
148 priv->valid = !ret;
149
150 mc13xxx_unlock(priv->mc13xxx);
151
152 return ret;
153}
154
155static int mc13xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
156{
157 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
158 unsigned int seconds, days;
159 time64_t s1970;
160 int enabled, pending;
161 int ret;
162
163 mc13xxx_lock(priv->mc13xxx);
164
165 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &seconds);
166 if (unlikely(ret))
167 goto out;
168 if (seconds >= SEC_PER_DAY) {
169 ret = -ENODATA;
170 goto out;
171 }
172
173 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days);
174 if (unlikely(ret))
175 goto out;
176
177 ret = mc13xxx_irq_status(priv->mc13xxx, MC13XXX_IRQ_TODA,
178 &enabled, &pending);
179
180out:
181 mc13xxx_unlock(priv->mc13xxx);
182
183 if (ret)
184 return ret;
185
186 alarm->enabled = enabled;
187 alarm->pending = pending;
188
189 s1970 = (time64_t)days * SEC_PER_DAY + seconds;
190
191 rtc_time64_to_tm(s1970, &alarm->time);
192 dev_dbg(dev, "%s: %lld\n", __func__, (long long)s1970);
193
194 return 0;
195}
196
197static int mc13xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
198{
199 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
200 time64_t s1970;
201 u32 seconds, days;
202 int ret;
203
204 mc13xxx_lock(priv->mc13xxx);
205
206 /* disable alarm to prevent false triggering */
207 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, 0x1ffff);
208 if (unlikely(ret))
209 goto out;
210
211 ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_TODA);
212 if (unlikely(ret))
213 goto out;
214
215 s1970 = rtc_tm_to_time64(&alarm->time);
216
217 dev_dbg(dev, "%s: %s %lld\n", __func__, alarm->enabled ? "on" : "off",
218 (long long)s1970);
219
220 ret = mc13xxx_rtc_irq_enable_unlocked(dev, alarm->enabled,
221 MC13XXX_IRQ_TODA);
222 if (unlikely(ret))
223 goto out;
224
225 days = div_s64_rem(s1970, SEC_PER_DAY, &seconds);
226
227 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAYA, days);
228 if (unlikely(ret))
229 goto out;
230
231 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, seconds);
232
233out:
234 mc13xxx_unlock(priv->mc13xxx);
235
236 return ret;
237}
238
239static irqreturn_t mc13xxx_rtc_alarm_handler(int irq, void *dev)
240{
241 struct mc13xxx_rtc *priv = dev;
242 struct mc13xxx *mc13xxx = priv->mc13xxx;
243
244 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_AF);
245
246 mc13xxx_irq_ack(mc13xxx, irq);
247
248 return IRQ_HANDLED;
249}
250
251static const struct rtc_class_ops mc13xxx_rtc_ops = {
252 .read_time = mc13xxx_rtc_read_time,
253 .set_time = mc13xxx_rtc_set_time,
254 .read_alarm = mc13xxx_rtc_read_alarm,
255 .set_alarm = mc13xxx_rtc_set_alarm,
256 .alarm_irq_enable = mc13xxx_rtc_alarm_irq_enable,
257};
258
259static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev)
260{
261 struct mc13xxx_rtc *priv = dev;
262 struct mc13xxx *mc13xxx = priv->mc13xxx;
263
264 priv->valid = 0;
265
266 mc13xxx_irq_mask(mc13xxx, irq);
267
268 return IRQ_HANDLED;
269}
270
271static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
272{
273 int ret;
274 struct mc13xxx_rtc *priv;
275 struct mc13xxx *mc13xxx;
276
277 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
278 if (!priv)
279 return -ENOMEM;
280
281 mc13xxx = dev_get_drvdata(pdev->dev.parent);
282 priv->mc13xxx = mc13xxx;
283 priv->valid = 1;
284
285 priv->rtc = devm_rtc_allocate_device(&pdev->dev);
286 if (IS_ERR(priv->rtc))
287 return PTR_ERR(priv->rtc);
288 platform_set_drvdata(pdev, priv);
289
290 priv->rtc->ops = &mc13xxx_rtc_ops;
291 /* 15bit days + hours, minutes, seconds */
292 priv->rtc->range_max = (timeu64_t)(1 << 15) * SEC_PER_DAY - 1;
293
294 mc13xxx_lock(mc13xxx);
295
296 mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_RTCRST);
297
298 ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_RTCRST,
299 mc13xxx_rtc_reset_handler, DRIVER_NAME, priv);
300 if (ret)
301 goto err_irq_request;
302
303 ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_TODA,
304 mc13xxx_rtc_alarm_handler, DRIVER_NAME, priv);
305 if (ret)
306 goto err_irq_request;
307
308 mc13xxx_unlock(mc13xxx);
309
310 ret = devm_rtc_register_device(priv->rtc);
311 if (ret) {
312 mc13xxx_lock(mc13xxx);
313 goto err_irq_request;
314 }
315
316 return 0;
317
318err_irq_request:
319 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_TODA, priv);
320 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_RTCRST, priv);
321
322 mc13xxx_unlock(mc13xxx);
323
324 return ret;
325}
326
327static int mc13xxx_rtc_remove(struct platform_device *pdev)
328{
329 struct mc13xxx_rtc *priv = platform_get_drvdata(pdev);
330
331 mc13xxx_lock(priv->mc13xxx);
332
333 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TODA, priv);
334 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_RTCRST, priv);
335
336 mc13xxx_unlock(priv->mc13xxx);
337
338 return 0;
339}
340
341static const struct platform_device_id mc13xxx_rtc_idtable[] = {
342 {
343 .name = "mc13783-rtc",
344 }, {
345 .name = "mc13892-rtc",
346 }, {
347 .name = "mc34708-rtc",
348 },
349 { /* sentinel */ }
350};
351MODULE_DEVICE_TABLE(platform, mc13xxx_rtc_idtable);
352
353static struct platform_driver mc13xxx_rtc_driver = {
354 .id_table = mc13xxx_rtc_idtable,
355 .remove = mc13xxx_rtc_remove,
356 .driver = {
357 .name = DRIVER_NAME,
358 },
359};
360
361module_platform_driver_probe(mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
362
363MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
364MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
365MODULE_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
26struct mc13xxx_rtc {
27 struct rtc_device *rtc;
28 struct mc13xxx *mc13xxx;
29 int valid;
30};
31
32static int mc13xxx_rtc_irq_enable_unlocked(struct device *dev,
33 unsigned int enabled, int irq)
34{
35 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
36 int (*func)(struct mc13xxx *mc13xxx, int irq);
37
38 if (!priv->valid)
39 return -ENODATA;
40
41 func = enabled ? mc13xxx_irq_unmask : mc13xxx_irq_mask;
42 return func(priv->mc13xxx, irq);
43}
44
45static int mc13xxx_rtc_irq_enable(struct device *dev,
46 unsigned int enabled, int irq)
47{
48 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
49 int ret;
50
51 mc13xxx_lock(priv->mc13xxx);
52
53 ret = mc13xxx_rtc_irq_enable_unlocked(dev, enabled, irq);
54
55 mc13xxx_unlock(priv->mc13xxx);
56
57 return ret;
58}
59
60static int mc13xxx_rtc_read_time(struct device *dev, struct rtc_time *tm)
61{
62 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
63 unsigned int seconds, days1, days2;
64 unsigned long s1970;
65 int ret;
66
67 mc13xxx_lock(priv->mc13xxx);
68
69 if (!priv->valid) {
70 ret = -ENODATA;
71 goto out;
72 }
73
74 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days1);
75 if (unlikely(ret))
76 goto out;
77
78 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds);
79 if (unlikely(ret))
80 goto out;
81
82 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days2);
83out:
84 mc13xxx_unlock(priv->mc13xxx);
85
86 if (ret)
87 return ret;
88
89 if (days2 == days1 + 1) {
90 if (seconds >= 86400 / 2)
91 days2 = days1;
92 else
93 days1 = days2;
94 }
95
96 if (days1 != days2)
97 return -EIO;
98
99 s1970 = days1 * 86400 + seconds;
100
101 rtc_time_to_tm(s1970, tm);
102
103 return rtc_valid_tm(tm);
104}
105
106static int mc13xxx_rtc_set_mmss(struct device *dev, unsigned long secs)
107{
108 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
109 unsigned int seconds, days;
110 unsigned int alarmseconds;
111 int ret;
112
113 seconds = secs % 86400;
114 days = secs / 86400;
115
116 mc13xxx_lock(priv->mc13xxx);
117
118 /*
119 * temporarily invalidate alarm to prevent triggering it when the day is
120 * already updated while the time isn't yet.
121 */
122 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &alarmseconds);
123 if (unlikely(ret))
124 goto out;
125
126 if (alarmseconds < 86400) {
127 ret = mc13xxx_reg_write(priv->mc13xxx,
128 MC13XXX_RTCTODA, 0x1ffff);
129 if (unlikely(ret))
130 goto out;
131 }
132
133 /*
134 * write seconds=0 to prevent a day switch between writing days
135 * and seconds below
136 */
137 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, 0);
138 if (unlikely(ret))
139 goto out;
140
141 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAY, days);
142 if (unlikely(ret))
143 goto out;
144
145 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, seconds);
146 if (unlikely(ret))
147 goto out;
148
149 /* restore alarm */
150 if (alarmseconds < 86400) {
151 ret = mc13xxx_reg_write(priv->mc13xxx,
152 MC13XXX_RTCTODA, alarmseconds);
153 if (unlikely(ret))
154 goto out;
155 }
156
157 ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
158 if (unlikely(ret))
159 goto out;
160
161 ret = mc13xxx_irq_unmask(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
162out:
163 priv->valid = !ret;
164
165 mc13xxx_unlock(priv->mc13xxx);
166
167 return ret;
168}
169
170static int mc13xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
171{
172 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
173 unsigned seconds, days;
174 unsigned long s1970;
175 int enabled, pending;
176 int ret;
177
178 mc13xxx_lock(priv->mc13xxx);
179
180 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &seconds);
181 if (unlikely(ret))
182 goto out;
183 if (seconds >= 86400) {
184 ret = -ENODATA;
185 goto out;
186 }
187
188 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days);
189 if (unlikely(ret))
190 goto out;
191
192 ret = mc13xxx_irq_status(priv->mc13xxx, MC13XXX_IRQ_TODA,
193 &enabled, &pending);
194
195out:
196 mc13xxx_unlock(priv->mc13xxx);
197
198 if (ret)
199 return ret;
200
201 alarm->enabled = enabled;
202 alarm->pending = pending;
203
204 s1970 = days * 86400 + seconds;
205
206 rtc_time_to_tm(s1970, &alarm->time);
207 dev_dbg(dev, "%s: %lu\n", __func__, s1970);
208
209 return 0;
210}
211
212static int mc13xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
213{
214 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
215 unsigned long s1970;
216 unsigned seconds, days;
217 int ret;
218
219 mc13xxx_lock(priv->mc13xxx);
220
221 /* disable alarm to prevent false triggering */
222 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, 0x1ffff);
223 if (unlikely(ret))
224 goto out;
225
226 ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_TODA);
227 if (unlikely(ret))
228 goto out;
229
230 ret = rtc_tm_to_time(&alarm->time, &s1970);
231 if (unlikely(ret))
232 goto out;
233
234 dev_dbg(dev, "%s: o%2.s %lu\n", __func__, alarm->enabled ? "n" : "ff",
235 s1970);
236
237 ret = mc13xxx_rtc_irq_enable_unlocked(dev, alarm->enabled,
238 MC13XXX_IRQ_TODA);
239 if (unlikely(ret))
240 goto out;
241
242 seconds = s1970 % 86400;
243 days = s1970 / 86400;
244
245 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAYA, days);
246 if (unlikely(ret))
247 goto out;
248
249 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, seconds);
250
251out:
252 mc13xxx_unlock(priv->mc13xxx);
253
254 return ret;
255}
256
257static irqreturn_t mc13xxx_rtc_alarm_handler(int irq, void *dev)
258{
259 struct mc13xxx_rtc *priv = dev;
260 struct mc13xxx *mc13xxx = priv->mc13xxx;
261
262 dev_dbg(&priv->rtc->dev, "Alarm\n");
263
264 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_AF);
265
266 mc13xxx_irq_ack(mc13xxx, irq);
267
268 return IRQ_HANDLED;
269}
270
271static irqreturn_t mc13xxx_rtc_update_handler(int irq, void *dev)
272{
273 struct mc13xxx_rtc *priv = dev;
274 struct mc13xxx *mc13xxx = priv->mc13xxx;
275
276 dev_dbg(&priv->rtc->dev, "1HZ\n");
277
278 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_UF);
279
280 mc13xxx_irq_ack(mc13xxx, irq);
281
282 return IRQ_HANDLED;
283}
284
285static int mc13xxx_rtc_alarm_irq_enable(struct device *dev,
286 unsigned int enabled)
287{
288 return mc13xxx_rtc_irq_enable(dev, enabled, MC13XXX_IRQ_TODA);
289}
290
291static const struct rtc_class_ops mc13xxx_rtc_ops = {
292 .read_time = mc13xxx_rtc_read_time,
293 .set_mmss = mc13xxx_rtc_set_mmss,
294 .read_alarm = mc13xxx_rtc_read_alarm,
295 .set_alarm = mc13xxx_rtc_set_alarm,
296 .alarm_irq_enable = mc13xxx_rtc_alarm_irq_enable,
297};
298
299static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev)
300{
301 struct mc13xxx_rtc *priv = dev;
302 struct mc13xxx *mc13xxx = priv->mc13xxx;
303
304 dev_dbg(&priv->rtc->dev, "RTCRST\n");
305 priv->valid = 0;
306
307 mc13xxx_irq_mask(mc13xxx, irq);
308
309 return IRQ_HANDLED;
310}
311
312static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
313{
314 int ret;
315 struct mc13xxx_rtc *priv;
316 struct mc13xxx *mc13xxx;
317 int rtcrst_pending;
318
319 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
320 if (!priv)
321 return -ENOMEM;
322
323 mc13xxx = dev_get_drvdata(pdev->dev.parent);
324 priv->mc13xxx = mc13xxx;
325
326 platform_set_drvdata(pdev, priv);
327
328 mc13xxx_lock(mc13xxx);
329
330 ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_RTCRST,
331 mc13xxx_rtc_reset_handler, DRIVER_NAME, priv);
332 if (ret)
333 goto err_reset_irq_request;
334
335 ret = mc13xxx_irq_status(mc13xxx, MC13XXX_IRQ_RTCRST,
336 NULL, &rtcrst_pending);
337 if (ret)
338 goto err_reset_irq_status;
339
340 priv->valid = !rtcrst_pending;
341
342 ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_1HZ,
343 mc13xxx_rtc_update_handler, DRIVER_NAME, priv);
344 if (ret)
345 goto err_update_irq_request;
346
347 ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_TODA,
348 mc13xxx_rtc_alarm_handler, DRIVER_NAME, priv);
349 if (ret)
350 goto err_alarm_irq_request;
351
352 mc13xxx_unlock(mc13xxx);
353
354 priv->rtc = rtc_device_register(pdev->name,
355 &pdev->dev, &mc13xxx_rtc_ops, THIS_MODULE);
356 if (IS_ERR(priv->rtc)) {
357 ret = PTR_ERR(priv->rtc);
358
359 mc13xxx_lock(mc13xxx);
360
361 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_TODA, priv);
362err_alarm_irq_request:
363
364 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_1HZ, priv);
365err_update_irq_request:
366
367err_reset_irq_status:
368
369 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_RTCRST, priv);
370err_reset_irq_request:
371
372 mc13xxx_unlock(mc13xxx);
373
374 platform_set_drvdata(pdev, NULL);
375 kfree(priv);
376 }
377
378 return ret;
379}
380
381static int __exit mc13xxx_rtc_remove(struct platform_device *pdev)
382{
383 struct mc13xxx_rtc *priv = platform_get_drvdata(pdev);
384
385 mc13xxx_lock(priv->mc13xxx);
386
387 rtc_device_unregister(priv->rtc);
388
389 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TODA, priv);
390 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_1HZ, priv);
391 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_RTCRST, priv);
392
393 mc13xxx_unlock(priv->mc13xxx);
394
395 platform_set_drvdata(pdev, NULL);
396
397 kfree(priv);
398
399 return 0;
400}
401
402static const struct platform_device_id mc13xxx_rtc_idtable[] = {
403 {
404 .name = "mc13783-rtc",
405 }, {
406 .name = "mc13892-rtc",
407 },
408 { }
409};
410
411static struct platform_driver mc13xxx_rtc_driver = {
412 .id_table = mc13xxx_rtc_idtable,
413 .remove = __exit_p(mc13xxx_rtc_remove),
414 .driver = {
415 .name = DRIVER_NAME,
416 .owner = THIS_MODULE,
417 },
418};
419
420static int __init mc13xxx_rtc_init(void)
421{
422 return platform_driver_probe(&mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
423}
424module_init(mc13xxx_rtc_init);
425
426static void __exit mc13xxx_rtc_exit(void)
427{
428 platform_driver_unregister(&mc13xxx_rtc_driver);
429}
430module_exit(mc13xxx_rtc_exit);
431
432MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
433MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
434MODULE_LICENSE("GPL v2");
435MODULE_ALIAS("platform:" DRIVER_NAME);