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authorJonathan Herman <hermanjl@cs.unc.edu>2013-01-22 10:38:37 -0500
committerJonathan Herman <hermanjl@cs.unc.edu>2013-01-22 10:38:37 -0500
commitfcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch)
treea57612d1888735a2ec7972891b68c1ac5ec8faea /drivers/rtc
parent8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff)
Added missing tegra files.HEADmaster
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/alarm-dev.c286
-rw-r--r--drivers/rtc/alarm.c590
-rw-r--r--drivers/rtc/rtc-max77663.c617
-rw-r--r--drivers/rtc/rtc-max8907c.c323
-rw-r--r--drivers/rtc/rtc-ricoh583.c403
-rw-r--r--drivers/rtc/rtc-tps6591x.c546
-rw-r--r--drivers/rtc/rtc-tps80031.c449
7 files changed, 3214 insertions, 0 deletions
diff --git a/drivers/rtc/alarm-dev.c b/drivers/rtc/alarm-dev.c
new file mode 100644
index 00000000000..686e6f7ed48
--- /dev/null
+++ b/drivers/rtc/alarm-dev.c
@@ -0,0 +1,286 @@
1/* drivers/rtc/alarm-dev.c
2 *
3 * Copyright (C) 2007-2009 Google, Inc.
4 *
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 */
15
16#include <asm/mach/time.h>
17#include <linux/android_alarm.h>
18#include <linux/device.h>
19#include <linux/miscdevice.h>
20#include <linux/fs.h>
21#include <linux/platform_device.h>
22#include <linux/sched.h>
23#include <linux/spinlock.h>
24#include <linux/sysdev.h>
25#include <linux/uaccess.h>
26#include <linux/wakelock.h>
27
28#define ANDROID_ALARM_PRINT_INFO (1U << 0)
29#define ANDROID_ALARM_PRINT_IO (1U << 1)
30#define ANDROID_ALARM_PRINT_INT (1U << 2)
31
32static int debug_mask = ANDROID_ALARM_PRINT_INFO;
33module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
34
35#define pr_alarm(debug_level_mask, args...) \
36 do { \
37 if (debug_mask & ANDROID_ALARM_PRINT_##debug_level_mask) { \
38 pr_info(args); \
39 } \
40 } while (0)
41
42#define ANDROID_ALARM_WAKEUP_MASK ( \
43 ANDROID_ALARM_RTC_WAKEUP_MASK | \
44 ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK)
45
46/* support old usespace code */
47#define ANDROID_ALARM_SET_OLD _IOW('a', 2, time_t) /* set alarm */
48#define ANDROID_ALARM_SET_AND_WAIT_OLD _IOW('a', 3, time_t)
49
50static int alarm_opened;
51static DEFINE_SPINLOCK(alarm_slock);
52static struct wake_lock alarm_wake_lock;
53static DECLARE_WAIT_QUEUE_HEAD(alarm_wait_queue);
54static uint32_t alarm_pending;
55static uint32_t alarm_enabled;
56static uint32_t wait_pending;
57
58static struct alarm alarms[ANDROID_ALARM_TYPE_COUNT];
59
60static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
61{
62 int rv = 0;
63 unsigned long flags;
64 struct timespec new_alarm_time;
65 struct timespec new_rtc_time;
66 struct timespec tmp_time;
67 enum android_alarm_type alarm_type = ANDROID_ALARM_IOCTL_TO_TYPE(cmd);
68 uint32_t alarm_type_mask = 1U << alarm_type;
69
70 if (alarm_type >= ANDROID_ALARM_TYPE_COUNT)
71 return -EINVAL;
72
73 if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_GET_TIME(0)) {
74 if ((file->f_flags & O_ACCMODE) == O_RDONLY)
75 return -EPERM;
76 if (file->private_data == NULL &&
77 cmd != ANDROID_ALARM_SET_RTC) {
78 spin_lock_irqsave(&alarm_slock, flags);
79 if (alarm_opened) {
80 spin_unlock_irqrestore(&alarm_slock, flags);
81 return -EBUSY;
82 }
83 alarm_opened = 1;
84 file->private_data = (void *)1;
85 spin_unlock_irqrestore(&alarm_slock, flags);
86 }
87 }
88
89 switch (ANDROID_ALARM_BASE_CMD(cmd)) {
90 case ANDROID_ALARM_CLEAR(0):
91 spin_lock_irqsave(&alarm_slock, flags);
92 pr_alarm(IO, "alarm %d clear\n", alarm_type);
93 alarm_try_to_cancel(&alarms[alarm_type]);
94 if (alarm_pending) {
95 alarm_pending &= ~alarm_type_mask;
96 if (!alarm_pending && !wait_pending)
97 wake_unlock(&alarm_wake_lock);
98 }
99 alarm_enabled &= ~alarm_type_mask;
100 spin_unlock_irqrestore(&alarm_slock, flags);
101 break;
102
103 case ANDROID_ALARM_SET_OLD:
104 case ANDROID_ALARM_SET_AND_WAIT_OLD:
105 if (get_user(new_alarm_time.tv_sec, (int __user *)arg)) {
106 rv = -EFAULT;
107 goto err1;
108 }
109 new_alarm_time.tv_nsec = 0;
110 goto from_old_alarm_set;
111
112 case ANDROID_ALARM_SET_AND_WAIT(0):
113 case ANDROID_ALARM_SET(0):
114 if (copy_from_user(&new_alarm_time, (void __user *)arg,
115 sizeof(new_alarm_time))) {
116 rv = -EFAULT;
117 goto err1;
118 }
119from_old_alarm_set:
120 spin_lock_irqsave(&alarm_slock, flags);
121 pr_alarm(IO, "alarm %d set %ld.%09ld\n", alarm_type,
122 new_alarm_time.tv_sec, new_alarm_time.tv_nsec);
123 alarm_enabled |= alarm_type_mask;
124 alarm_start_range(&alarms[alarm_type],
125 timespec_to_ktime(new_alarm_time),
126 timespec_to_ktime(new_alarm_time));
127 spin_unlock_irqrestore(&alarm_slock, flags);
128 if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_SET_AND_WAIT(0)
129 && cmd != ANDROID_ALARM_SET_AND_WAIT_OLD)
130 break;
131 /* fall though */
132 case ANDROID_ALARM_WAIT:
133 spin_lock_irqsave(&alarm_slock, flags);
134 pr_alarm(IO, "alarm wait\n");
135 if (!alarm_pending && wait_pending) {
136 wake_unlock(&alarm_wake_lock);
137 wait_pending = 0;
138 }
139 spin_unlock_irqrestore(&alarm_slock, flags);
140 rv = wait_event_interruptible(alarm_wait_queue, alarm_pending);
141 if (rv)
142 goto err1;
143 spin_lock_irqsave(&alarm_slock, flags);
144 rv = alarm_pending;
145 wait_pending = 1;
146 alarm_pending = 0;
147 spin_unlock_irqrestore(&alarm_slock, flags);
148 break;
149 case ANDROID_ALARM_SET_RTC:
150 if (copy_from_user(&new_rtc_time, (void __user *)arg,
151 sizeof(new_rtc_time))) {
152 rv = -EFAULT;
153 goto err1;
154 }
155 rv = alarm_set_rtc(new_rtc_time);
156 spin_lock_irqsave(&alarm_slock, flags);
157 alarm_pending |= ANDROID_ALARM_TIME_CHANGE_MASK;
158 wake_up(&alarm_wait_queue);
159 spin_unlock_irqrestore(&alarm_slock, flags);
160 if (rv < 0)
161 goto err1;
162 break;
163 case ANDROID_ALARM_GET_TIME(0):
164 switch (alarm_type) {
165 case ANDROID_ALARM_RTC_WAKEUP:
166 case ANDROID_ALARM_RTC:
167 getnstimeofday(&tmp_time);
168 break;
169 case ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP:
170 case ANDROID_ALARM_ELAPSED_REALTIME:
171 tmp_time =
172 ktime_to_timespec(alarm_get_elapsed_realtime());
173 break;
174 case ANDROID_ALARM_TYPE_COUNT:
175 case ANDROID_ALARM_SYSTEMTIME:
176 ktime_get_ts(&tmp_time);
177 break;
178 }
179 if (copy_to_user((void __user *)arg, &tmp_time,
180 sizeof(tmp_time))) {
181 rv = -EFAULT;
182 goto err1;
183 }
184 break;
185
186 default:
187 rv = -EINVAL;
188 goto err1;
189 }
190err1:
191 return rv;
192}
193
194static int alarm_open(struct inode *inode, struct file *file)
195{
196 file->private_data = NULL;
197 return 0;
198}
199
200static int alarm_release(struct inode *inode, struct file *file)
201{
202 int i;
203 unsigned long flags;
204
205 spin_lock_irqsave(&alarm_slock, flags);
206 if (file->private_data != 0) {
207 for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) {
208 uint32_t alarm_type_mask = 1U << i;
209 if (alarm_enabled & alarm_type_mask) {
210 pr_alarm(INFO, "alarm_release: clear alarm, "
211 "pending %d\n",
212 !!(alarm_pending & alarm_type_mask));
213 alarm_enabled &= ~alarm_type_mask;
214 }
215 spin_unlock_irqrestore(&alarm_slock, flags);
216 alarm_cancel(&alarms[i]);
217 spin_lock_irqsave(&alarm_slock, flags);
218 }
219 if (alarm_pending | wait_pending) {
220 if (alarm_pending)
221 pr_alarm(INFO, "alarm_release: clear "
222 "pending alarms %x\n", alarm_pending);
223 wake_unlock(&alarm_wake_lock);
224 wait_pending = 0;
225 alarm_pending = 0;
226 }
227 alarm_opened = 0;
228 }
229 spin_unlock_irqrestore(&alarm_slock, flags);
230 return 0;
231}
232
233static void alarm_triggered(struct alarm *alarm)
234{
235 unsigned long flags;
236 uint32_t alarm_type_mask = 1U << alarm->type;
237
238 pr_alarm(INT, "alarm_triggered type %d\n", alarm->type);
239 spin_lock_irqsave(&alarm_slock, flags);
240 if (alarm_enabled & alarm_type_mask) {
241 wake_lock_timeout(&alarm_wake_lock, 5 * HZ);
242 alarm_enabled &= ~alarm_type_mask;
243 alarm_pending |= alarm_type_mask;
244 wake_up(&alarm_wait_queue);
245 }
246 spin_unlock_irqrestore(&alarm_slock, flags);
247}
248
249static const struct file_operations alarm_fops = {
250 .owner = THIS_MODULE,
251 .unlocked_ioctl = alarm_ioctl,
252 .open = alarm_open,
253 .release = alarm_release,
254};
255
256static struct miscdevice alarm_device = {
257 .minor = MISC_DYNAMIC_MINOR,
258 .name = "alarm",
259 .fops = &alarm_fops,
260};
261
262static int __init alarm_dev_init(void)
263{
264 int err;
265 int i;
266
267 err = misc_register(&alarm_device);
268 if (err)
269 return err;
270
271 for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++)
272 alarm_init(&alarms[i], i, alarm_triggered);
273 wake_lock_init(&alarm_wake_lock, WAKE_LOCK_SUSPEND, "alarm");
274
275 return 0;
276}
277
278static void __exit alarm_dev_exit(void)
279{
280 misc_deregister(&alarm_device);
281 wake_lock_destroy(&alarm_wake_lock);
282}
283
284module_init(alarm_dev_init);
285module_exit(alarm_dev_exit);
286
diff --git a/drivers/rtc/alarm.c b/drivers/rtc/alarm.c
new file mode 100644
index 00000000000..28b0df836a3
--- /dev/null
+++ b/drivers/rtc/alarm.c
@@ -0,0 +1,590 @@
1/* drivers/rtc/alarm.c
2 *
3 * Copyright (C) 2007-2009 Google, Inc.
4 *
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 */
15
16#include <asm/mach/time.h>
17#include <linux/android_alarm.h>
18#include <linux/device.h>
19#include <linux/miscdevice.h>
20#include <linux/platform_device.h>
21#include <linux/rtc.h>
22#include <linux/sched.h>
23#include <linux/spinlock.h>
24#include <linux/sysdev.h>
25#include <linux/wakelock.h>
26
27#define ANDROID_ALARM_PRINT_ERROR (1U << 0)
28#define ANDROID_ALARM_PRINT_INIT_STATUS (1U << 1)
29#define ANDROID_ALARM_PRINT_TSET (1U << 2)
30#define ANDROID_ALARM_PRINT_CALL (1U << 3)
31#define ANDROID_ALARM_PRINT_SUSPEND (1U << 4)
32#define ANDROID_ALARM_PRINT_INT (1U << 5)
33#define ANDROID_ALARM_PRINT_FLOW (1U << 6)
34
35static int debug_mask = ANDROID_ALARM_PRINT_ERROR | \
36 ANDROID_ALARM_PRINT_INIT_STATUS;
37module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
38
39#define pr_alarm(debug_level_mask, args...) \
40 do { \
41 if (debug_mask & ANDROID_ALARM_PRINT_##debug_level_mask) { \
42 pr_info(args); \
43 } \
44 } while (0)
45
46#define ANDROID_ALARM_WAKEUP_MASK ( \
47 ANDROID_ALARM_RTC_WAKEUP_MASK | \
48 ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK)
49
50/* support old usespace code */
51#define ANDROID_ALARM_SET_OLD _IOW('a', 2, time_t) /* set alarm */
52#define ANDROID_ALARM_SET_AND_WAIT_OLD _IOW('a', 3, time_t)
53
54struct alarm_queue {
55 struct rb_root alarms;
56 struct rb_node *first;
57 struct hrtimer timer;
58 ktime_t delta;
59 bool stopped;
60 ktime_t stopped_time;
61};
62
63static struct rtc_device *alarm_rtc_dev;
64static DEFINE_SPINLOCK(alarm_slock);
65static DEFINE_MUTEX(alarm_setrtc_mutex);
66static struct wake_lock alarm_rtc_wake_lock;
67static struct platform_device *alarm_platform_dev;
68struct alarm_queue alarms[ANDROID_ALARM_TYPE_COUNT];
69static bool suspended;
70
71static void update_timer_locked(struct alarm_queue *base, bool head_removed)
72{
73 struct alarm *alarm;
74 bool is_wakeup = base == &alarms[ANDROID_ALARM_RTC_WAKEUP] ||
75 base == &alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP];
76
77 if (base->stopped) {
78 pr_alarm(FLOW, "changed alarm while setting the wall time\n");
79 return;
80 }
81
82 if (is_wakeup && !suspended && head_removed)
83 wake_unlock(&alarm_rtc_wake_lock);
84
85 if (!base->first)
86 return;
87
88 alarm = container_of(base->first, struct alarm, node);
89
90 pr_alarm(FLOW, "selected alarm, type %d, func %pF at %lld\n",
91 alarm->type, alarm->function, ktime_to_ns(alarm->expires));
92
93 if (is_wakeup && suspended) {
94 pr_alarm(FLOW, "changed alarm while suspened\n");
95 wake_lock_timeout(&alarm_rtc_wake_lock, 1 * HZ);
96 return;
97 }
98
99 hrtimer_try_to_cancel(&base->timer);
100 base->timer.node.expires = ktime_add(base->delta, alarm->expires);
101 base->timer._softexpires = ktime_add(base->delta, alarm->softexpires);
102 hrtimer_start_expires(&base->timer, HRTIMER_MODE_ABS);
103}
104
105static void alarm_enqueue_locked(struct alarm *alarm)
106{
107 struct alarm_queue *base = &alarms[alarm->type];
108 struct rb_node **link = &base->alarms.rb_node;
109 struct rb_node *parent = NULL;
110 struct alarm *entry;
111 int leftmost = 1;
112 bool was_first = false;
113
114 pr_alarm(FLOW, "added alarm, type %d, func %pF at %lld\n",
115 alarm->type, alarm->function, ktime_to_ns(alarm->expires));
116
117 if (base->first == &alarm->node) {
118 base->first = rb_next(&alarm->node);
119 was_first = true;
120 }
121 if (!RB_EMPTY_NODE(&alarm->node)) {
122 rb_erase(&alarm->node, &base->alarms);
123 RB_CLEAR_NODE(&alarm->node);
124 }
125
126 while (*link) {
127 parent = *link;
128 entry = rb_entry(parent, struct alarm, node);
129 /*
130 * We dont care about collisions. Nodes with
131 * the same expiry time stay together.
132 */
133 if (alarm->expires.tv64 < entry->expires.tv64) {
134 link = &(*link)->rb_left;
135 } else {
136 link = &(*link)->rb_right;
137 leftmost = 0;
138 }
139 }
140 if (leftmost)
141 base->first = &alarm->node;
142 if (leftmost || was_first)
143 update_timer_locked(base, was_first);
144
145 rb_link_node(&alarm->node, parent, link);
146 rb_insert_color(&alarm->node, &base->alarms);
147}
148
149/**
150 * alarm_init - initialize an alarm
151 * @alarm: the alarm to be initialized
152 * @type: the alarm type to be used
153 * @function: alarm callback function
154 */
155void alarm_init(struct alarm *alarm,
156 enum android_alarm_type type, void (*function)(struct alarm *))
157{
158 RB_CLEAR_NODE(&alarm->node);
159 alarm->type = type;
160 alarm->function = function;
161
162 pr_alarm(FLOW, "created alarm, type %d, func %pF\n", type, function);
163}
164
165
166/**
167 * alarm_start_range - (re)start an alarm
168 * @alarm: the alarm to be added
169 * @start: earliest expiry time
170 * @end: expiry time
171 */
172void alarm_start_range(struct alarm *alarm, ktime_t start, ktime_t end)
173{
174 unsigned long flags;
175
176 spin_lock_irqsave(&alarm_slock, flags);
177 alarm->softexpires = start;
178 alarm->expires = end;
179 alarm_enqueue_locked(alarm);
180 spin_unlock_irqrestore(&alarm_slock, flags);
181}
182
183/**
184 * alarm_try_to_cancel - try to deactivate an alarm
185 * @alarm: alarm to stop
186 *
187 * Returns:
188 * 0 when the alarm was not active
189 * 1 when the alarm was active
190 * -1 when the alarm may currently be excuting the callback function and
191 * cannot be stopped (it may also be inactive)
192 */
193int alarm_try_to_cancel(struct alarm *alarm)
194{
195 struct alarm_queue *base = &alarms[alarm->type];
196 unsigned long flags;
197 bool first = false;
198 int ret = 0;
199
200 spin_lock_irqsave(&alarm_slock, flags);
201 if (!RB_EMPTY_NODE(&alarm->node)) {
202 pr_alarm(FLOW, "canceled alarm, type %d, func %pF at %lld\n",
203 alarm->type, alarm->function,
204 ktime_to_ns(alarm->expires));
205 ret = 1;
206 if (base->first == &alarm->node) {
207 base->first = rb_next(&alarm->node);
208 first = true;
209 }
210 rb_erase(&alarm->node, &base->alarms);
211 RB_CLEAR_NODE(&alarm->node);
212 if (first)
213 update_timer_locked(base, true);
214 } else
215 pr_alarm(FLOW, "tried to cancel alarm, type %d, func %pF\n",
216 alarm->type, alarm->function);
217 spin_unlock_irqrestore(&alarm_slock, flags);
218 if (!ret && hrtimer_callback_running(&base->timer))
219 ret = -1;
220 return ret;
221}
222
223/**
224 * alarm_cancel - cancel an alarm and wait for the handler to finish.
225 * @alarm: the alarm to be cancelled
226 *
227 * Returns:
228 * 0 when the alarm was not active
229 * 1 when the alarm was active
230 */
231int alarm_cancel(struct alarm *alarm)
232{
233 for (;;) {
234 int ret = alarm_try_to_cancel(alarm);
235 if (ret >= 0)
236 return ret;
237 cpu_relax();
238 }
239}
240
241/**
242 * alarm_set_rtc - set the kernel and rtc walltime
243 * @new_time: timespec value containing the new time
244 */
245int alarm_set_rtc(struct timespec new_time)
246{
247 int i;
248 int ret;
249 unsigned long flags;
250 struct rtc_time rtc_new_rtc_time;
251 struct timespec tmp_time;
252
253 rtc_time_to_tm(new_time.tv_sec, &rtc_new_rtc_time);
254
255 pr_alarm(TSET, "set rtc %ld %ld - rtc %02d:%02d:%02d %02d/%02d/%04d\n",
256 new_time.tv_sec, new_time.tv_nsec,
257 rtc_new_rtc_time.tm_hour, rtc_new_rtc_time.tm_min,
258 rtc_new_rtc_time.tm_sec, rtc_new_rtc_time.tm_mon + 1,
259 rtc_new_rtc_time.tm_mday,
260 rtc_new_rtc_time.tm_year + 1900);
261
262 mutex_lock(&alarm_setrtc_mutex);
263 spin_lock_irqsave(&alarm_slock, flags);
264 wake_lock(&alarm_rtc_wake_lock);
265 getnstimeofday(&tmp_time);
266 for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) {
267 hrtimer_try_to_cancel(&alarms[i].timer);
268 alarms[i].stopped = true;
269 alarms[i].stopped_time = timespec_to_ktime(tmp_time);
270 }
271 alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].delta =
272 alarms[ANDROID_ALARM_ELAPSED_REALTIME].delta =
273 ktime_sub(alarms[ANDROID_ALARM_ELAPSED_REALTIME].delta,
274 timespec_to_ktime(timespec_sub(tmp_time, new_time)));
275 spin_unlock_irqrestore(&alarm_slock, flags);
276 ret = do_settimeofday(&new_time);
277 spin_lock_irqsave(&alarm_slock, flags);
278 for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) {
279 alarms[i].stopped = false;
280 update_timer_locked(&alarms[i], false);
281 }
282 spin_unlock_irqrestore(&alarm_slock, flags);
283 if (ret < 0) {
284 pr_alarm(ERROR, "alarm_set_rtc: Failed to set time\n");
285 goto err;
286 }
287 if (!alarm_rtc_dev) {
288 pr_alarm(ERROR,
289 "alarm_set_rtc: no RTC, time will be lost on reboot\n");
290 goto err;
291 }
292 ret = rtc_set_time(alarm_rtc_dev, &rtc_new_rtc_time);
293 if (ret < 0)
294 pr_alarm(ERROR, "alarm_set_rtc: "
295 "Failed to set RTC, time will be lost on reboot\n");
296err:
297 wake_unlock(&alarm_rtc_wake_lock);
298 mutex_unlock(&alarm_setrtc_mutex);
299 return ret;
300}
301
302/**
303 * alarm_get_elapsed_realtime - get the elapsed real time in ktime_t format
304 *
305 * returns the time in ktime_t format
306 */
307ktime_t alarm_get_elapsed_realtime(void)
308{
309 ktime_t now;
310 unsigned long flags;
311 struct alarm_queue *base = &alarms[ANDROID_ALARM_ELAPSED_REALTIME];
312
313 spin_lock_irqsave(&alarm_slock, flags);
314 now = base->stopped ? base->stopped_time : ktime_get_real();
315 now = ktime_sub(now, base->delta);
316 spin_unlock_irqrestore(&alarm_slock, flags);
317 return now;
318}
319
320static enum hrtimer_restart alarm_timer_triggered(struct hrtimer *timer)
321{
322 struct alarm_queue *base;
323 struct alarm *alarm;
324 unsigned long flags;
325 ktime_t now;
326
327 spin_lock_irqsave(&alarm_slock, flags);
328
329 base = container_of(timer, struct alarm_queue, timer);
330 now = base->stopped ? base->stopped_time : hrtimer_cb_get_time(timer);
331 now = ktime_sub(now, base->delta);
332
333 pr_alarm(INT, "alarm_timer_triggered type %d at %lld\n",
334 base - alarms, ktime_to_ns(now));
335
336 while (base->first) {
337 alarm = container_of(base->first, struct alarm, node);
338 if (alarm->softexpires.tv64 > now.tv64) {
339 pr_alarm(FLOW, "don't call alarm, %pF, %lld (s %lld)\n",
340 alarm->function, ktime_to_ns(alarm->expires),
341 ktime_to_ns(alarm->softexpires));
342 break;
343 }
344 base->first = rb_next(&alarm->node);
345 rb_erase(&alarm->node, &base->alarms);
346 RB_CLEAR_NODE(&alarm->node);
347 pr_alarm(CALL, "call alarm, type %d, func %pF, %lld (s %lld)\n",
348 alarm->type, alarm->function,
349 ktime_to_ns(alarm->expires),
350 ktime_to_ns(alarm->softexpires));
351 spin_unlock_irqrestore(&alarm_slock, flags);
352 alarm->function(alarm);
353 spin_lock_irqsave(&alarm_slock, flags);
354 }
355 if (!base->first)
356 pr_alarm(FLOW, "no more alarms of type %d\n", base - alarms);
357 update_timer_locked(base, true);
358 spin_unlock_irqrestore(&alarm_slock, flags);
359 return HRTIMER_NORESTART;
360}
361
362static void alarm_triggered_func(void *p)
363{
364 struct rtc_device *rtc = alarm_rtc_dev;
365 if (!(rtc->irq_data & RTC_AF))
366 return;
367 pr_alarm(INT, "rtc alarm triggered\n");
368 wake_lock_timeout(&alarm_rtc_wake_lock, 1 * HZ);
369}
370
371static int alarm_suspend(struct platform_device *pdev, pm_message_t state)
372{
373 int err = 0;
374 unsigned long flags;
375 struct rtc_wkalrm rtc_alarm;
376 struct rtc_time rtc_current_rtc_time;
377 unsigned long rtc_current_time;
378 unsigned long rtc_alarm_time;
379 struct timespec rtc_delta;
380 struct timespec wall_time;
381 struct alarm_queue *wakeup_queue = NULL;
382 struct alarm_queue *tmp_queue = NULL;
383
384 pr_alarm(SUSPEND, "alarm_suspend(%p, %d)\n", pdev, state.event);
385
386 spin_lock_irqsave(&alarm_slock, flags);
387 suspended = true;
388 spin_unlock_irqrestore(&alarm_slock, flags);
389
390 hrtimer_cancel(&alarms[ANDROID_ALARM_RTC_WAKEUP].timer);
391 hrtimer_cancel(&alarms[
392 ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].timer);
393
394 tmp_queue = &alarms[ANDROID_ALARM_RTC_WAKEUP];
395 if (tmp_queue->first)
396 wakeup_queue = tmp_queue;
397 tmp_queue = &alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP];
398 if (tmp_queue->first && (!wakeup_queue ||
399 hrtimer_get_expires(&tmp_queue->timer).tv64 <
400 hrtimer_get_expires(&wakeup_queue->timer).tv64))
401 wakeup_queue = tmp_queue;
402 if (wakeup_queue) {
403 rtc_read_time(alarm_rtc_dev, &rtc_current_rtc_time);
404 getnstimeofday(&wall_time);
405 rtc_tm_to_time(&rtc_current_rtc_time, &rtc_current_time);
406 set_normalized_timespec(&rtc_delta,
407 wall_time.tv_sec - rtc_current_time,
408 wall_time.tv_nsec);
409
410 rtc_alarm_time = timespec_sub(ktime_to_timespec(
411 hrtimer_get_expires(&wakeup_queue->timer)),
412 rtc_delta).tv_sec;
413
414 rtc_time_to_tm(rtc_alarm_time, &rtc_alarm.time);
415 rtc_alarm.enabled = 1;
416 rtc_set_alarm(alarm_rtc_dev, &rtc_alarm);
417 rtc_read_time(alarm_rtc_dev, &rtc_current_rtc_time);
418 rtc_tm_to_time(&rtc_current_rtc_time, &rtc_current_time);
419 pr_alarm(SUSPEND,
420 "rtc alarm set at %ld, now %ld, rtc delta %ld.%09ld\n",
421 rtc_alarm_time, rtc_current_time,
422 rtc_delta.tv_sec, rtc_delta.tv_nsec);
423 if (rtc_current_time + 1 >= rtc_alarm_time) {
424 pr_alarm(SUSPEND, "alarm about to go off\n");
425 memset(&rtc_alarm, 0, sizeof(rtc_alarm));
426 rtc_alarm.enabled = 0;
427 rtc_set_alarm(alarm_rtc_dev, &rtc_alarm);
428
429 spin_lock_irqsave(&alarm_slock, flags);
430 suspended = false;
431 wake_lock_timeout(&alarm_rtc_wake_lock, 2 * HZ);
432 update_timer_locked(&alarms[ANDROID_ALARM_RTC_WAKEUP],
433 false);
434 update_timer_locked(&alarms[
435 ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP], false);
436 err = -EBUSY;
437 spin_unlock_irqrestore(&alarm_slock, flags);
438 }
439 }
440 return err;
441}
442
443static int alarm_resume(struct platform_device *pdev)
444{
445 struct rtc_wkalrm alarm;
446 unsigned long flags;
447
448 pr_alarm(SUSPEND, "alarm_resume(%p)\n", pdev);
449
450 memset(&alarm, 0, sizeof(alarm));
451 alarm.enabled = 0;
452 rtc_set_alarm(alarm_rtc_dev, &alarm);
453
454 spin_lock_irqsave(&alarm_slock, flags);
455 suspended = false;
456 update_timer_locked(&alarms[ANDROID_ALARM_RTC_WAKEUP], false);
457 update_timer_locked(&alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP],
458 false);
459 spin_unlock_irqrestore(&alarm_slock, flags);
460
461 return 0;
462}
463
464static struct rtc_task alarm_rtc_task = {
465 .func = alarm_triggered_func
466};
467
468static int rtc_alarm_add_device(struct device *dev,
469 struct class_interface *class_intf)
470{
471 int err;
472 struct rtc_device *rtc = to_rtc_device(dev);
473
474 mutex_lock(&alarm_setrtc_mutex);
475
476 if (alarm_rtc_dev) {
477 err = -EBUSY;
478 goto err1;
479 }
480
481 alarm_platform_dev =
482 platform_device_register_simple("alarm", -1, NULL, 0);
483 if (IS_ERR(alarm_platform_dev)) {
484 err = PTR_ERR(alarm_platform_dev);
485 goto err2;
486 }
487 err = rtc_irq_register(rtc, &alarm_rtc_task);
488 if (err)
489 goto err3;
490 alarm_rtc_dev = rtc;
491 pr_alarm(INIT_STATUS, "using rtc device, %s, for alarms", rtc->name);
492 mutex_unlock(&alarm_setrtc_mutex);
493
494 return 0;
495
496err3:
497 platform_device_unregister(alarm_platform_dev);
498err2:
499err1:
500 mutex_unlock(&alarm_setrtc_mutex);
501 return err;
502}
503
504static void rtc_alarm_remove_device(struct device *dev,
505 struct class_interface *class_intf)
506{
507 if (dev == &alarm_rtc_dev->dev) {
508 pr_alarm(INIT_STATUS, "lost rtc device for alarms");
509 rtc_irq_unregister(alarm_rtc_dev, &alarm_rtc_task);
510 platform_device_unregister(alarm_platform_dev);
511 alarm_rtc_dev = NULL;
512 }
513}
514
515static struct class_interface rtc_alarm_interface = {
516 .add_dev = &rtc_alarm_add_device,
517 .remove_dev = &rtc_alarm_remove_device,
518};
519
520static struct platform_driver alarm_driver = {
521 .suspend = alarm_suspend,
522 .resume = alarm_resume,
523 .driver = {
524 .name = "alarm"
525 }
526};
527
528static int __init alarm_late_init(void)
529{
530 unsigned long flags;
531 struct timespec tmp_time, system_time;
532
533 /* this needs to run after the rtc is read at boot */
534 spin_lock_irqsave(&alarm_slock, flags);
535 /* We read the current rtc and system time so we can later calulate
536 * elasped realtime to be (boot_systemtime + rtc - boot_rtc) ==
537 * (rtc - (boot_rtc - boot_systemtime))
538 */
539 getnstimeofday(&tmp_time);
540 ktime_get_ts(&system_time);
541 alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].delta =
542 alarms[ANDROID_ALARM_ELAPSED_REALTIME].delta =
543 timespec_to_ktime(timespec_sub(tmp_time, system_time));
544
545 spin_unlock_irqrestore(&alarm_slock, flags);
546 return 0;
547}
548
549static int __init alarm_driver_init(void)
550{
551 int err;
552 int i;
553
554 for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) {
555 hrtimer_init(&alarms[i].timer,
556 CLOCK_REALTIME, HRTIMER_MODE_ABS);
557 alarms[i].timer.function = alarm_timer_triggered;
558 }
559 hrtimer_init(&alarms[ANDROID_ALARM_SYSTEMTIME].timer,
560 CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
561 alarms[ANDROID_ALARM_SYSTEMTIME].timer.function = alarm_timer_triggered;
562 err = platform_driver_register(&alarm_driver);
563 if (err < 0)
564 goto err1;
565 wake_lock_init(&alarm_rtc_wake_lock, WAKE_LOCK_SUSPEND, "alarm_rtc");
566 rtc_alarm_interface.class = rtc_class;
567 err = class_interface_register(&rtc_alarm_interface);
568 if (err < 0)
569 goto err2;
570
571 return 0;
572
573err2:
574 wake_lock_destroy(&alarm_rtc_wake_lock);
575 platform_driver_unregister(&alarm_driver);
576err1:
577 return err;
578}
579
580static void __exit alarm_exit(void)
581{
582 class_interface_unregister(&rtc_alarm_interface);
583 wake_lock_destroy(&alarm_rtc_wake_lock);
584 platform_driver_unregister(&alarm_driver);
585}
586
587late_initcall(alarm_late_init);
588module_init(alarm_driver_init);
589module_exit(alarm_exit);
590
diff --git a/drivers/rtc/rtc-max77663.c b/drivers/rtc/rtc-max77663.c
new file mode 100644
index 00000000000..874a2df86dc
--- /dev/null
+++ b/drivers/rtc/rtc-max77663.c
@@ -0,0 +1,617 @@
1/*
2 * drivers/rtc/rtc-max77663.c
3 * Max77663 RTC driver
4 *
5 * Copyright 2011 Maxim Integrated Products, Inc.
6 * Copyright (C) 2011 NVIDIA Corporation
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
12 *
13 */
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/slab.h>
17#include <linux/delay.h>
18#include <linux/i2c.h>
19#include <linux/rtc.h>
20#include <linux/mfd/max77663-core.h>
21
22/* RTC Registers */
23#define MAX77663_RTC_IRQ 0x00
24#define MAX77663_RTC_IRQ_MASK 0x01
25#define MAX77663_RTC_CTRL_MODE 0x02
26#define MAX77663_RTC_CTRL 0x03
27#define MAX77663_RTC_UPDATE0 0x04
28#define MAX77663_RTC_UPDATE1 0x05
29#define MAX77663_RTC_SEC 0x07
30#define MAX77663_RTC_MIN 0x08
31#define MAX77663_RTC_HOUR 0x09
32#define MAX77663_RTC_WEEKDAY 0x0A
33#define MAX77663_RTC_MONTH 0x0B
34#define MAX77663_RTC_YEAR 0x0C
35#define MAX77663_RTC_MONTHDAY 0x0D
36#define MAX77663_RTC_ALARM_SEC1 0x0E
37#define MAX77663_RTC_ALARM_MIN1 0x0F
38#define MAX77663_RTC_ALARM_HOUR1 0x10
39#define MAX77663_RTC_ALARM_WEEKDAY1 0x11
40#define MAX77663_RTC_ALARM_MONTH1 0x12
41#define MAX77663_RTC_ALARM_YEAR1 0x13
42#define MAX77663_RTC_ALARM_MONTHDAY1 0x14
43
44#define RTC_IRQ_60SEC_MASK (1 << 0)
45#define RTC_IRQ_ALARM1_MASK (1 << 1)
46#define RTC_IRQ_ALARM2_MASK (1 << 2)
47#define RTC_IRQ_SMPL_MASK (1 << 3)
48#define RTC_IRQ_1SEC_MASK (1 << 4)
49#define RTC_IRQ_MASK 0x1F
50
51#define BCD_MODE_MASK (1 << 0)
52#define HR_MODE_MASK (1 << 1)
53
54#define WB_UPDATE_MASK (1 << 0)
55#define FLAG_AUTO_CLEAR_MASK (1 << 1)
56#define FREEZE_SEC_MASK (1 << 2)
57#define RTC_WAKE_MASK (1 << 3)
58#define RB_UPDATE_MASK (1 << 4)
59
60#define WB_UPDATE_FLAG_MASK (1 << 0)
61#define RB_UPDATE_FLAG_MASK (1 << 1)
62
63#define SEC_MASK 0x7F
64#define MIN_MASK 0x7F
65#define HOUR_MASK 0x3F
66#define WEEKDAY_MASK 0x7F
67#define MONTH_MASK 0x1F
68#define YEAR_MASK 0xFF
69#define MONTHDAY_MASK 0x3F
70
71#define ALARM_EN_MASK 0x80
72#define ALARM_EN_SHIFT 7
73
74#define RTC_YEAR_BASE 100
75#define RTC_YEAR_MAX 99
76
77/* ON/OFF Registers */
78#define MAX77663_REG_ONOFF_CFG2 0x42
79
80#define ONOFF_WK_ALARM1_MASK (1 << 2)
81
82enum {
83 RTC_SEC,
84 RTC_MIN,
85 RTC_HOUR,
86 RTC_WEEKDAY,
87 RTC_MONTH,
88 RTC_YEAR,
89 RTC_MONTHDAY,
90 RTC_NR
91};
92
93struct max77663_rtc {
94 struct rtc_device *rtc;
95 struct device *dev;
96
97 struct mutex io_lock;
98 int irq;
99 u8 irq_mask;
100};
101
102static inline struct device *_to_parent(struct max77663_rtc *rtc)
103{
104 return rtc->dev->parent;
105}
106
107static inline int max77663_rtc_update_buffer(struct max77663_rtc *rtc,
108 int write)
109{
110 struct device *parent = _to_parent(rtc);
111 u8 val = FLAG_AUTO_CLEAR_MASK | RTC_WAKE_MASK;
112 int ret;
113
114 if (write)
115 val |= WB_UPDATE_MASK;
116 else
117 val |= RB_UPDATE_MASK;
118
119 dev_dbg(rtc->dev, "rtc_update_buffer: write=%d, addr=0x%x, val=0x%x\n",
120 write, MAX77663_RTC_UPDATE0, val);
121 ret = max77663_write(parent, MAX77663_RTC_UPDATE0, &val, 1, 1);
122 if (ret < 0) {
123 dev_err(rtc->dev, "rtc_update_buffer: "
124 "Failed to get rtc update0\n");
125 return ret;
126 }
127
128 /*
129 * Must wait 14ms for buffer update.
130 * If the sleeping time is 10us - 20ms, usleep_range() is recommended.
131 * Please refer Documentation/timers/timers-howto.txt.
132 */
133 usleep_range(14000, 14000);
134
135 return 0;
136}
137
138static inline int max77663_rtc_write(struct max77663_rtc *rtc, u8 addr,
139 void *values, u32 len, int update_buffer)
140{
141 struct device *parent = _to_parent(rtc);
142 int ret;
143
144 mutex_lock(&rtc->io_lock);
145
146 dev_dbg(rtc->dev, "rtc_write: addr=0x%x, values=0x%x, len=%u, "
147 "update_buffer=%d\n",
148 addr, *((u8 *)values), len, update_buffer);
149 ret = max77663_write(parent, addr, values, len, 1);
150 if (ret < 0)
151 goto out;
152
153 if (update_buffer)
154 ret = max77663_rtc_update_buffer(rtc, 1);
155
156out:
157 mutex_unlock(&rtc->io_lock);
158 return ret;
159}
160
161static inline int max77663_rtc_read(struct max77663_rtc *rtc, u8 addr,
162 void *values, u32 len, int update_buffer)
163{
164 struct device *parent = _to_parent(rtc);
165 int ret;
166
167 mutex_lock(&rtc->io_lock);
168
169 if (update_buffer) {
170 ret = max77663_rtc_update_buffer(rtc, 0);
171 if (ret < 0)
172 goto out;
173 }
174
175 ret = max77663_read(parent, addr, values, len, 1);
176 dev_dbg(rtc->dev, "rtc_read: addr=0x%x, values=0x%x, len=%u, "
177 "update_buffer=%d\n",
178 addr, *((u8 *)values), len, update_buffer);
179
180out:
181 mutex_unlock(&rtc->io_lock);
182 return ret;
183}
184
185static inline int max77663_rtc_reg_to_tm(struct max77663_rtc *rtc, u8 *buf,
186 struct rtc_time *tm)
187{
188 int wday = buf[RTC_WEEKDAY] & WEEKDAY_MASK;
189
190 if (unlikely(!wday)) {
191 dev_err(rtc->dev,
192 "rtc_reg_to_tm: Invalid day of week, %d\n", wday);
193 return -EINVAL;
194 }
195
196 tm->tm_sec = (int)(buf[RTC_SEC] & SEC_MASK);
197 tm->tm_min = (int)(buf[RTC_MIN] & MIN_MASK);
198 tm->tm_hour = (int)(buf[RTC_HOUR] & HOUR_MASK);
199 tm->tm_mday = (int)(buf[RTC_MONTHDAY] & MONTHDAY_MASK);
200 tm->tm_mon = (int)(buf[RTC_MONTH] & MONTH_MASK) - 1;
201 tm->tm_year = (int)(buf[RTC_YEAR] & YEAR_MASK) + RTC_YEAR_BASE;
202 tm->tm_wday = ffs(wday) - 1;
203
204 return 0;
205}
206
207static inline int max77663_rtc_tm_to_reg(struct max77663_rtc *rtc, u8 *buf,
208 struct rtc_time *tm, int alarm)
209{
210 u8 alarm_mask = alarm ? ALARM_EN_MASK : 0;
211
212 if (unlikely((tm->tm_year < RTC_YEAR_BASE) ||
213 (tm->tm_year > RTC_YEAR_BASE + RTC_YEAR_MAX))) {
214 dev_err(rtc->dev,
215 "rtc_tm_to_reg: Invalid year, %d\n", tm->tm_year);
216 return -EINVAL;
217 }
218
219 buf[RTC_SEC] = tm->tm_sec | alarm_mask;
220 buf[RTC_MIN] = tm->tm_min | alarm_mask;
221 buf[RTC_HOUR] = tm->tm_hour | alarm_mask;
222 buf[RTC_MONTHDAY] = tm->tm_mday | alarm_mask;
223 buf[RTC_MONTH] = (tm->tm_mon + 1) | alarm_mask;
224 buf[RTC_YEAR] = (tm->tm_year - RTC_YEAR_BASE) | alarm_mask;
225
226 /* The wday is configured only when disabled alarm. */
227 if (!alarm)
228 buf[RTC_WEEKDAY] = (1 << tm->tm_wday);
229 else
230 buf[RTC_WEEKDAY] = 0;
231
232 return 0;
233}
234
235static inline int max77663_rtc_irq_mask(struct max77663_rtc *rtc, u8 irq)
236{
237 struct device *parent = _to_parent(rtc);
238 u8 irq_mask = rtc->irq_mask | irq;
239 int ret = 0;
240
241 ret = max77663_write(parent, MAX77663_RTC_IRQ_MASK, &irq_mask, 1, 1);
242 if (ret < 0) {
243 dev_err(rtc->dev, "rtc_irq_mask: Failed to set rtc irq mask\n");
244 goto out;
245 }
246 rtc->irq_mask = irq_mask;
247
248out:
249 return ret;
250}
251
252static inline int max77663_rtc_irq_unmask(struct max77663_rtc *rtc, u8 irq)
253{
254 struct device *parent = _to_parent(rtc);
255 u8 irq_mask = rtc->irq_mask & ~irq;
256 int ret = 0;
257
258 ret = max77663_write(parent, MAX77663_RTC_IRQ_MASK, &irq_mask, 1, 1);
259 if (ret < 0) {
260 dev_err(rtc->dev,
261 "rtc_irq_unmask: Failed to set rtc irq mask\n");
262 goto out;
263 }
264 rtc->irq_mask = irq_mask;
265
266out:
267 return ret;
268}
269
270static inline int max77663_rtc_do_irq(struct max77663_rtc *rtc)
271{
272 struct device *parent = _to_parent(rtc);
273 u8 irq_status;
274 int ret;
275
276 ret = max77663_rtc_update_buffer(rtc, 0);
277 if (ret < 0) {
278 dev_err(rtc->dev, "rtc_irq: Failed to get rtc update buffer\n");
279 return ret;
280 }
281
282 ret = max77663_read(parent, MAX77663_RTC_IRQ, &irq_status, 1, 1);
283 if (ret < 0) {
284 dev_err(rtc->dev, "rtc_irq: Failed to get rtc irq status\n");
285 return ret;
286 }
287
288 dev_dbg(rtc->dev, "rtc_do_irq: irq_mask=0x%02x, irq_status=0x%02x\n",
289 rtc->irq_mask, irq_status);
290
291 if (!(rtc->irq_mask & RTC_IRQ_ALARM1_MASK) &&
292 (irq_status & RTC_IRQ_ALARM1_MASK))
293 rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
294
295 if (!(rtc->irq_mask & RTC_IRQ_1SEC_MASK) &&
296 (irq_status & RTC_IRQ_1SEC_MASK))
297 rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_UF);
298
299 return ret;
300}
301
302static irqreturn_t max77663_rtc_irq(int irq, void *data)
303{
304 struct max77663_rtc *rtc = (struct max77663_rtc *)data;
305
306 max77663_rtc_do_irq(rtc);
307
308 return IRQ_HANDLED;
309}
310
311static int max77663_rtc_alarm_irq_enable(struct device *dev,
312 unsigned int enabled)
313{
314 struct max77663_rtc *rtc = dev_get_drvdata(dev);
315 int ret = 0;
316
317 if (rtc->irq < 0)
318 return -ENXIO;
319
320 mutex_lock(&rtc->io_lock);
321
322 /* Handle pending interrupt */
323 ret = max77663_rtc_do_irq(rtc);
324 if (ret < 0)
325 goto out;
326
327 /* Config alarm interrupt */
328 if (enabled) {
329 ret = max77663_rtc_irq_unmask(rtc, RTC_IRQ_ALARM1_MASK);
330 if (ret < 0)
331 goto out;
332 } else {
333 ret = max77663_rtc_irq_mask(rtc, RTC_IRQ_ALARM1_MASK);
334 if (ret < 0)
335 goto out;
336 }
337out:
338 mutex_unlock(&rtc->io_lock);
339 return ret;
340}
341
342static int max77663_rtc_read_time(struct device *dev, struct rtc_time *tm)
343{
344 struct max77663_rtc *rtc = dev_get_drvdata(dev);
345 u8 buf[RTC_NR];
346 int ret;
347
348 ret = max77663_rtc_read(rtc, MAX77663_RTC_SEC, buf, sizeof(buf), 1);
349 if (ret < 0) {
350 dev_err(rtc->dev, "rtc_read_time: Failed to read rtc time\n");
351 return ret;
352 }
353
354 dev_dbg(rtc->dev, "rtc_read_time: "
355 "buf: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
356 buf[RTC_SEC], buf[RTC_MIN], buf[RTC_HOUR], buf[RTC_WEEKDAY],
357 buf[RTC_MONTH], buf[RTC_YEAR], buf[RTC_MONTHDAY]);
358
359 ret = max77663_rtc_reg_to_tm(rtc, buf, tm);
360 if (ret < 0) {
361 dev_err(rtc->dev, "rtc_read_time: "
362 "Failed to convert register format into time format\n");
363 return ret;
364 }
365
366 dev_dbg(rtc->dev, "rtc_read_time: "
367 "tm: %d-%02d-%02d %02d:%02d:%02d, wday=%d\n",
368 tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min,
369 tm->tm_sec, tm->tm_wday);
370
371 return ret;
372}
373
374static int max77663_rtc_set_time(struct device *dev, struct rtc_time *tm)
375{
376 struct max77663_rtc *rtc = dev_get_drvdata(dev);
377 u8 buf[RTC_NR];
378 int ret;
379
380 dev_dbg(rtc->dev, "rtc_set_time: "
381 "tm: %d-%02d-%02d %02d:%02d:%02d, wday=%d\n",
382 tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min,
383 tm->tm_sec, tm->tm_wday);
384
385 ret = max77663_rtc_tm_to_reg(rtc, buf, tm, 0);
386 if (ret < 0) {
387 dev_err(rtc->dev, "rtc_set_time: "
388 "Failed to convert time format into register format\n");
389 return ret;
390 }
391
392 dev_dbg(rtc->dev, "rtc_set_time: "
393 "buf: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
394 buf[RTC_SEC], buf[RTC_MIN], buf[RTC_HOUR], buf[RTC_WEEKDAY],
395 buf[RTC_MONTH], buf[RTC_YEAR], buf[RTC_MONTHDAY]);
396
397 return max77663_rtc_write(rtc, MAX77663_RTC_SEC, buf, sizeof(buf), 1);
398}
399
400static int max77663_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
401{
402 struct max77663_rtc *rtc = dev_get_drvdata(dev);
403 u8 buf[RTC_NR];
404 int ret;
405
406 ret = max77663_rtc_read(rtc, MAX77663_RTC_ALARM_SEC1, buf, sizeof(buf),
407 1);
408 if (ret < 0) {
409 dev_err(rtc->dev,
410 "rtc_read_alarm: Failed to read rtc alarm time\n");
411 return ret;
412 }
413
414 dev_dbg(rtc->dev, "rtc_read_alarm: "
415 "buf: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
416 buf[RTC_SEC], buf[RTC_MIN], buf[RTC_HOUR], buf[RTC_WEEKDAY],
417 buf[RTC_MONTH], buf[RTC_YEAR], buf[RTC_MONTHDAY]);
418
419 ret = max77663_rtc_reg_to_tm(rtc, buf, &alrm->time);
420 if (ret < 0) {
421 dev_err(rtc->dev, "rtc_read_alarm: "
422 "Failed to convert register format into time format\n");
423 return ret;
424 }
425
426 dev_dbg(rtc->dev, "rtc_read_alarm: "
427 "tm: %d-%02d-%02d %02d:%02d:%02d, wday=%d\n",
428 alrm->time.tm_year, alrm->time.tm_mon, alrm->time.tm_mday,
429 alrm->time.tm_hour, alrm->time.tm_min, alrm->time.tm_sec,
430 alrm->time.tm_wday);
431
432 if (rtc->irq_mask & RTC_IRQ_ALARM1_MASK)
433 alrm->enabled = 1;
434 else
435 alrm->enabled = 0;
436
437 return 0;
438}
439
440static int max77663_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
441{
442 struct max77663_rtc *rtc = dev_get_drvdata(dev);
443 u8 buf[RTC_NR];
444 int ret;
445
446 dev_dbg(rtc->dev, "rtc_set_alarm: "
447 "tm: %d-%02d-%02d %02d:%02d:%02d, wday=%d [%s]\n",
448 alrm->time.tm_year, alrm->time.tm_mon, alrm->time.tm_mday,
449 alrm->time.tm_hour, alrm->time.tm_min, alrm->time.tm_sec,
450 alrm->time.tm_wday, alrm->enabled?"enable":"disable");
451
452 ret = max77663_rtc_tm_to_reg(rtc, buf, &alrm->time, 1);
453 if (ret < 0) {
454 dev_err(rtc->dev, "rtc_set_alarm: "
455 "Failed to convert time format into register format\n");
456 return ret;
457 }
458
459 dev_dbg(rtc->dev, "rtc_set_alarm: "
460 "buf: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
461 buf[RTC_SEC], buf[RTC_MIN], buf[RTC_HOUR], buf[RTC_WEEKDAY],
462 buf[RTC_MONTH], buf[RTC_YEAR], buf[RTC_MONTHDAY]);
463
464 ret = max77663_rtc_write(rtc, MAX77663_RTC_ALARM_SEC1, buf, sizeof(buf),
465 1);
466 if (ret < 0) {
467 dev_err(rtc->dev,
468 "rtc_set_alarm: Failed to write rtc alarm time\n");
469 return ret;
470 }
471
472 ret = max77663_rtc_alarm_irq_enable(dev, alrm->enabled);
473 if (ret < 0) {
474 dev_err(rtc->dev,
475 "rtc_set_alarm: Failed to enable rtc alarm\n");
476 return ret;
477 }
478
479 return ret;
480}
481
482static const struct rtc_class_ops max77663_rtc_ops = {
483 .read_time = max77663_rtc_read_time,
484 .set_time = max77663_rtc_set_time,
485 .read_alarm = max77663_rtc_read_alarm,
486 .set_alarm = max77663_rtc_set_alarm,
487 .alarm_irq_enable = max77663_rtc_alarm_irq_enable,
488};
489
490static int max77663_rtc_preinit(struct max77663_rtc *rtc)
491{
492 struct device *parent = _to_parent(rtc);
493 u8 val;
494 int ret;
495
496 /* Mask all interrupts */
497 rtc->irq_mask = 0xFF;
498 ret = max77663_rtc_write(rtc, MAX77663_RTC_IRQ_MASK, &rtc->irq_mask, 1,
499 0);
500 if (ret < 0) {
501 dev_err(rtc->dev, "preinit: Failed to set rtc irq mask\n");
502 return ret;
503 }
504
505 /* Configure Binary mode and 24hour mode */
506 val = HR_MODE_MASK;
507 ret = max77663_rtc_write(rtc, MAX77663_RTC_CTRL, &val, 1, 0);
508 if (ret < 0) {
509 dev_err(rtc->dev, "preinit: Failed to set rtc control\n");
510 return ret;
511 }
512
513 /* It should be disabled alarm wakeup to wakeup from sleep
514 * by EN1 input signal */
515 ret = max77663_set_bits(parent, MAX77663_REG_ONOFF_CFG2,
516 ONOFF_WK_ALARM1_MASK, 0, 0);
517 if (ret < 0) {
518 dev_err(rtc->dev, "preinit: Failed to set onoff cfg2\n");
519 return ret;
520 }
521
522 return 0;
523}
524
525static int max77663_rtc_probe(struct platform_device *pdev)
526{
527 struct max77663_platform_data *parent_pdata =
528 pdev->dev.parent->platform_data;
529 static struct max77663_rtc *rtc;
530 int ret = 0;
531
532 rtc = kzalloc(sizeof(struct max77663_rtc), GFP_KERNEL);
533 if (!rtc) {
534 dev_err(&pdev->dev, "probe: kzalloc() failed\n");
535 return -ENOMEM;
536 }
537
538 dev_set_drvdata(&pdev->dev, rtc);
539 rtc->dev = &pdev->dev;
540 mutex_init(&rtc->io_lock);
541
542 ret = max77663_rtc_preinit(rtc);
543 if (ret) {
544 dev_err(&pdev->dev, "probe: Failed to rtc preinit\n");
545 goto out_kfree;
546 }
547
548 rtc->rtc = rtc_device_register("max77663-rtc", &pdev->dev,
549 &max77663_rtc_ops, THIS_MODULE);
550 if (IS_ERR_OR_NULL(rtc->rtc)) {
551 dev_err(&pdev->dev, "probe: Failed to register rtc\n");
552 ret = PTR_ERR(rtc->rtc);
553 goto out_kfree;
554 }
555
556 if (parent_pdata->irq_base < 0)
557 goto out;
558
559 rtc->irq = parent_pdata->irq_base + MAX77663_IRQ_RTC;
560 ret = request_threaded_irq(rtc->irq, NULL, max77663_rtc_irq,
561 IRQF_ONESHOT, "max77663-rtc", rtc);
562 if (ret < 0) {
563 dev_err(rtc->dev, "probe: Failed to request irq %d\n",
564 rtc->irq);
565 rtc->irq = -1;
566 } else {
567 device_init_wakeup(rtc->dev, 1);
568 enable_irq_wake(rtc->irq);
569 }
570
571 return 0;
572
573out_kfree:
574 mutex_destroy(&rtc->io_lock);
575 kfree(rtc->rtc);
576out:
577 return ret;
578}
579
580static int __devexit max77663_rtc_remove(struct platform_device *pdev)
581{
582 struct max77663_rtc *rtc = dev_get_drvdata(&pdev->dev);
583
584 if (rtc->irq != -1)
585 free_irq(rtc->irq, rtc);
586
587 rtc_device_unregister(rtc->rtc);
588 mutex_destroy(&rtc->io_lock);
589 kfree(rtc);
590
591 return 0;
592}
593
594static struct platform_driver max77663_rtc_driver = {
595 .probe = max77663_rtc_probe,
596 .remove = __devexit_p(max77663_rtc_remove),
597 .driver = {
598 .name = "max77663-rtc",
599 .owner = THIS_MODULE,
600 },
601};
602
603static int __init max77663_rtc_init(void)
604{
605 return platform_driver_register(&max77663_rtc_driver);
606}
607module_init(max77663_rtc_init);
608
609static void __exit max77663_rtc_exit(void)
610{
611 platform_driver_unregister(&max77663_rtc_driver);
612}
613module_exit(max77663_rtc_exit);
614
615MODULE_DESCRIPTION("max77663 RTC driver");
616MODULE_LICENSE("GPL v2");
617MODULE_VERSION("1.0");
diff --git a/drivers/rtc/rtc-max8907c.c b/drivers/rtc/rtc-max8907c.c
new file mode 100644
index 00000000000..f7287021da3
--- /dev/null
+++ b/drivers/rtc/rtc-max8907c.c
@@ -0,0 +1,323 @@
1/*
2 * RTC driver for Maxim MAX8907c
3 *
4 * Copyright (c) 2011, NVIDIA Corporation.
5 * Based on drivers/rtc/rtc-max8925.c, Copyright (C) 2009-2010 Marvell International Ltd.
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/module.h>
13#include <linux/i2c.h>
14#include <linux/slab.h>
15#include <linux/rtc.h>
16#include <linux/platform_device.h>
17#include <linux/mfd/max8907c.h>
18
19enum {
20 RTC_SEC = 0,
21 RTC_MIN,
22 RTC_HOUR,
23 RTC_WEEKDAY,
24 RTC_DATE,
25 RTC_MONTH,
26 RTC_YEAR1,
27 RTC_YEAR2,
28};
29
30#define TIME_NUM 8
31#define ALARM_1SEC (1 << 7)
32#define HOUR_12 (1 << 7)
33#define HOUR_AM_PM (1 << 5)
34#define ALARM0_IRQ (1 << 3)
35#define ALARM1_IRQ (1 << 2)
36#define ALARM0_STATUS (1 << 2)
37#define ALARM1_STATUS (1 << 1)
38
39struct max8907c_rtc_info {
40 struct rtc_device *rtc_dev;
41 struct i2c_client *i2c;
42 struct max8907c *chip;
43};
44
45static irqreturn_t rtc_update_handler(int irq, void *data)
46{
47 struct max8907c_rtc_info *info = (struct max8907c_rtc_info *)data;
48
49 /* disable ALARM0 except for 1SEC alarm */
50 max8907c_set_bits(info->i2c, MAX8907C_REG_ALARM0_CNTL, 0x7f, 0);
51 rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
52 return IRQ_HANDLED;
53}
54
55static int tm_calc(struct rtc_time *tm, u8 *buf, int len)
56{
57 if (len < TIME_NUM)
58 return -EINVAL;
59 tm->tm_year = (buf[RTC_YEAR2] >> 4) * 1000
60 + (buf[RTC_YEAR2] & 0xf) * 100
61 + (buf[RTC_YEAR1] >> 4) * 10
62 + (buf[RTC_YEAR1] & 0xf);
63 tm->tm_year -= 1900;
64 /* RTC month index issue in max8907c
65 : January index is 1 but kernel assumes it as 0 */
66 tm->tm_mon = ((buf[RTC_MONTH] >> 4) & 0x01) * 10
67 + (buf[RTC_MONTH] & 0x0f) - 1;
68 tm->tm_mday = ((buf[RTC_DATE] >> 4) & 0x03) * 10
69 + (buf[RTC_DATE] & 0x0f);
70 tm->tm_wday = buf[RTC_WEEKDAY] & 0x07;
71 if (buf[RTC_HOUR] & HOUR_12) {
72 tm->tm_hour = ((buf[RTC_HOUR] >> 4) & 0x1) * 10
73 + (buf[RTC_HOUR] & 0x0f);
74 if (buf[RTC_HOUR] & HOUR_AM_PM)
75 tm->tm_hour += 12;
76 } else {
77 tm->tm_hour = ((buf[RTC_HOUR] >> 4) & 0x03) * 10
78 + (buf[RTC_HOUR] & 0x0f);
79 }
80 tm->tm_min = ((buf[RTC_MIN] >> 4) & 0x7) * 10
81 + (buf[RTC_MIN] & 0x0f);
82 tm->tm_sec = ((buf[RTC_SEC] >> 4) & 0x7) * 10
83 + (buf[RTC_SEC] & 0x0f);
84 return 0;
85}
86
87static int data_calc(u8 *buf, struct rtc_time *tm, int len)
88{
89 u8 high, low;
90
91 if (len < TIME_NUM)
92 return -EINVAL;
93
94 high = (tm->tm_year + 1900) / 1000;
95 low = (tm->tm_year + 1900) / 100;
96 low = low - high * 10;
97 buf[RTC_YEAR2] = (high << 4) + low;
98 high = (tm->tm_year + 1900) / 10;
99 low = tm->tm_year + 1900;
100 low = low - high * 10;
101 high = high - (high / 10) * 10;
102 buf[RTC_YEAR1] = (high << 4) + low;
103
104 /* RTC month index issue in max8907c
105 : January index is 1 but kernel assumes it as 0 */
106 high = (tm->tm_mon + 1) / 10;
107 low = (tm->tm_mon + 1) % 10;
108 buf[RTC_MONTH] = (high << 4) + low;
109
110 high = tm->tm_mday / 10;
111 low = tm->tm_mday;
112 low = low - high * 10;
113 buf[RTC_DATE] = (high << 4) + low;
114 buf[RTC_WEEKDAY] = tm->tm_wday;
115 high = tm->tm_hour / 10;
116 low = tm->tm_hour;
117 low = low - high * 10;
118 buf[RTC_HOUR] = (high << 4) + low;
119 high = tm->tm_min / 10;
120 low = tm->tm_min;
121 low = low - high * 10;
122 buf[RTC_MIN] = (high << 4) + low;
123 high = tm->tm_sec / 10;
124 low = tm->tm_sec;
125 low = low - high * 10;
126 buf[RTC_SEC] = (high << 4) + low;
127 return 0;
128}
129
130static int max8907c_rtc_read_time(struct device *dev, struct rtc_time *tm)
131{
132 struct max8907c_rtc_info *info = dev_get_drvdata(dev);
133 u8 buf[TIME_NUM];
134 int ret;
135
136 ret = max8907c_reg_bulk_read(info->i2c, MAX8907C_REG_RTC_SEC, TIME_NUM, buf);
137
138 if (ret < 0)
139 return ret;
140 ret = tm_calc(tm, buf, TIME_NUM);
141
142 return ret;
143}
144
145static int max8907c_rtc_set_time(struct device *dev, struct rtc_time *tm)
146{
147 struct max8907c_rtc_info *info = dev_get_drvdata(dev);
148 u8 buf[TIME_NUM];
149 int ret;
150
151 ret = data_calc(buf, tm, TIME_NUM);
152
153 if (ret < 0)
154 return ret;
155 ret = max8907c_reg_bulk_write(info->i2c, MAX8907C_REG_RTC_SEC, TIME_NUM, buf);
156
157 return ret;
158}
159
160static int max8907c_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
161{
162 struct max8907c_rtc_info *info = dev_get_drvdata(dev);
163 unsigned char buf[TIME_NUM];
164 int ret;
165
166 ret = max8907c_reg_bulk_read(info->i2c, MAX8907C_REG_ALARM0_SEC, TIME_NUM, buf);
167 if (ret < 0)
168 return ret;
169 ret = tm_calc(&alrm->time, buf, TIME_NUM);
170 if (ret < 0)
171 return ret;
172 ret = max8907c_reg_read(info->i2c, MAX8907C_REG_RTC_IRQ_MASK);
173 if (ret < 0)
174 return ret;
175 if ((ret & ALARM0_IRQ) == 0)
176 alrm->enabled = 1;
177 else
178 alrm->enabled = 0;
179 ret = max8907c_reg_read(info->i2c, MAX8907C_REG_RTC_STATUS);
180 if (ret < 0)
181 return ret;
182 if (ret & ALARM0_STATUS)
183 alrm->pending = 1;
184 else
185 alrm->pending = 0;
186
187 return ret;
188}
189
190static int max8907c_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
191{
192 struct max8907c_rtc_info *info = dev_get_drvdata(dev);
193 unsigned char buf[TIME_NUM];
194 int ret;
195
196 ret = data_calc(buf, &alrm->time, TIME_NUM);
197 if (ret < 0)
198 return ret;
199 ret = max8907c_reg_bulk_write(info->i2c, MAX8907C_REG_ALARM0_SEC, TIME_NUM, buf);
200 if (ret < 0)
201 return ret;
202 /* only enable alarm on year/month/day/hour/min/sec */
203 ret = max8907c_reg_write(info->i2c, MAX8907C_REG_ALARM0_CNTL, 0x77);
204
205 return ret;
206}
207
208static const struct rtc_class_ops max8907c_rtc_ops = {
209 .read_time = max8907c_rtc_read_time,
210 .set_time = max8907c_rtc_set_time,
211 .read_alarm = max8907c_rtc_read_alarm,
212 .set_alarm = max8907c_rtc_set_alarm,
213};
214
215static int __devinit max8907c_rtc_probe(struct platform_device *pdev)
216{
217 struct max8907c *chip = dev_get_drvdata(pdev->dev.parent);
218 struct max8907c_rtc_info *info;
219 int irq, ret;
220
221 info = kzalloc(sizeof(struct max8907c_rtc_info), GFP_KERNEL);
222 if (!info)
223 return -ENOMEM;
224 info->i2c = chip->i2c_rtc;
225 info->chip = chip;
226
227 irq = chip->irq_base + MAX8907C_IRQ_RTC_ALARM0;
228
229 ret = request_threaded_irq(irq, NULL, rtc_update_handler,
230 IRQF_ONESHOT, "rtc-alarm0", info);
231 if (ret < 0) {
232 dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
233 irq, ret);
234 goto out_irq;
235 }
236
237 dev_set_drvdata(&pdev->dev, info);
238 info->rtc_dev = rtc_device_register("max8907c-rtc", &pdev->dev,
239 &max8907c_rtc_ops, THIS_MODULE);
240 ret = PTR_ERR(info->rtc_dev);
241 if (IS_ERR(info->rtc_dev)) {
242 dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
243 goto out_rtc;
244 }
245
246 max8907c_set_bits(chip->i2c_power, MAX8907C_REG_SYSENSEL, 0x2, 0x2);
247
248 platform_set_drvdata(pdev, info);
249
250 device_init_wakeup(&pdev->dev, 1);
251
252 return 0;
253out_rtc:
254 free_irq(chip->irq_base + MAX8907C_IRQ_RTC_ALARM0, info);
255
256out_irq:
257 kfree(info);
258 return ret;
259}
260
261static int __devexit max8907c_rtc_remove(struct platform_device *pdev)
262{
263 struct max8907c_rtc_info *info = platform_get_drvdata(pdev);
264
265 if (info) {
266 free_irq(info->chip->irq_base + MAX8907C_IRQ_RTC_ALARM0, info);
267
268 rtc_device_unregister(info->rtc_dev);
269 kfree(info);
270 }
271 return 0;
272}
273
274#ifdef CONFIG_PM
275static int max8907c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
276{
277 struct device *dev=&pdev->dev;
278 struct max8907c_rtc_info *info = platform_get_drvdata(pdev);
279
280 if (device_may_wakeup(dev))
281 enable_irq_wake(info->chip->irq_base + MAX8907C_IRQ_RTC_ALARM0);
282 return 0;
283}
284
285static int max8907c_rtc_resume(struct platform_device *pdev)
286{
287 struct device *dev=&pdev->dev;
288 struct max8907c_rtc_info *info = platform_get_drvdata(pdev);
289
290 if (device_may_wakeup(dev))
291 disable_irq_wake(info->chip->irq_base + MAX8907C_IRQ_RTC_ALARM0);
292 return 0;
293}
294#endif
295
296static struct platform_driver max8907c_rtc_driver = {
297 .driver = {
298 .name = "max8907c-rtc",
299 .owner = THIS_MODULE,
300 },
301 .probe = max8907c_rtc_probe,
302 .remove = __devexit_p(max8907c_rtc_remove),
303#ifdef CONFIG_PM
304 .suspend = max8907c_rtc_suspend,
305 .resume = max8907c_rtc_resume,
306#endif
307};
308
309static int __init max8907c_rtc_init(void)
310{
311 return platform_driver_register(&max8907c_rtc_driver);
312}
313module_init(max8907c_rtc_init);
314
315static void __exit max8907c_rtc_exit(void)
316{
317 platform_driver_unregister(&max8907c_rtc_driver);
318}
319module_exit(max8907c_rtc_exit);
320
321MODULE_DESCRIPTION("Maxim MAX8907C RTC driver");
322MODULE_LICENSE("GPL");
323
diff --git a/drivers/rtc/rtc-ricoh583.c b/drivers/rtc/rtc-ricoh583.c
new file mode 100644
index 00000000000..8bc17d9a101
--- /dev/null
+++ b/drivers/rtc/rtc-ricoh583.c
@@ -0,0 +1,403 @@
1/*
2 * drivers/rtc/rtc_ricoh583.c
3 *
4 * rtc driver for ricoh rc5t583 pmu
5 *
6 * copyright (c) 2011, nvidia corporation.
7 *
8 * this program is free software; you can redistribute it and/or modify
9 * it under the terms of the gnu general public license as published by
10 * the free software foundation; either version 2 of the license, or
11 * (at your option) any later version.
12 *
13 * this program is distributed in the hope that it will be useful, but without
14 * any warranty; without even the implied warranty of merchantability or
15 * fitness for a particular purpose. see the gnu general public license for
16 * more details.
17 *
18 * you should have received a copy of the gnu general public license along
19 * with this program; if not, write to the free software foundation, inc.,
20 * 51 franklin street, fifth floor, boston, ma 02110-1301, usa.
21 */
22
23/* #define debug 1 */
24/* #define verbose_debug 1 */
25
26#include <linux/device.h>
27#include <linux/err.h>
28#include <linux/init.h>
29#include <linux/kernel.h>
30#include <linux/mfd/ricoh583.h>
31#include <linux/platform_device.h>
32#include <linux/rtc.h>
33#include <linux/slab.h>
34
35#define rtc_ctrl1 0xED
36#define rtc_ctrl2 0xEE
37#define rtc_seconds_reg 0xE0
38#define rtc_alarm_y 0xF0
39#define rtc_adjust 0xE7
40
41/*
42linux rtc driver refers 1900 as base year in many calculations.
43(e.g. refer drivers/rtc/rtc-lib.c)
44*/
45#define os_ref_year 1900
46
47/*
48 pmu rtc have only 2 nibbles to store year information, so using an
49 offset of 100 to set the base year as 2000 for our driver.
50*/
51#define rtc_year_offset 100
52
53struct ricoh583_rtc {
54 unsigned long epoch_start;
55 int irq;
56 struct rtc_device *rtc;
57 bool irq_en;
58};
59
60static int ricoh583_read_regs(struct device *dev, int reg, int len,
61 uint8_t *val)
62{
63 int ret;
64
65 ret = ricoh583_bulk_reads(dev->parent, reg, len, val);
66 if (ret < 0) {
67 dev_err(dev->parent, "\n %s failed reading from 0x%02x\n",
68 __func__, reg);
69 WARN_ON(1);
70 }
71 return ret;
72}
73
74static int ricoh583_write_regs(struct device *dev, int reg, int len,
75 uint8_t *val)
76{
77 int ret;
78 ret = ricoh583_bulk_writes(dev->parent, reg, len, val);
79 if (ret < 0) {
80 dev_err(dev->parent, "\n %s failed writing\n", __func__);
81 WARN_ON(1);
82 }
83
84 return ret;
85}
86
87static int ricoh583_rtc_valid_tm(struct device *dev, struct rtc_time *tm)
88{
89 if (tm->tm_year >= (rtc_year_offset + 99)
90 || tm->tm_mon > 12
91 || tm->tm_mday < 1
92 || tm->tm_mday > rtc_month_days(tm->tm_mon,
93 tm->tm_year + os_ref_year)
94 || tm->tm_hour >= 24
95 || tm->tm_min >= 60
96 || tm->tm_sec >= 60) {
97 dev_err(dev->parent, "\n returning error due to time"
98 "%d/%d/%d %d:%d:%d", tm->tm_mon, tm->tm_mday,
99 tm->tm_year, tm->tm_hour, tm->tm_min, tm->tm_sec);
100 return -EINVAL;
101 }
102 return 0;
103}
104
105static u8 dec2bcd(u8 dec)
106{
107 return ((dec/10)<<4)+(dec%10);
108}
109
110static u8 bcd2dec(u8 bcd)
111{
112 return (bcd >> 4)*10+(bcd & 0xf);
113}
114
115static void convert_bcd_to_decimal(u8 *buf, u8 len)
116{
117 int i = 0;
118 for (i = 0; i < len; i++)
119 buf[i] = bcd2dec(buf[i]);
120}
121
122static void convert_decimal_to_bcd(u8 *buf, u8 len)
123{
124 int i = 0;
125 for (i = 0; i < len; i++)
126 buf[i] = dec2bcd(buf[i]);
127}
128
129static void print_time(struct device *dev, struct rtc_time *tm)
130{
131 dev_info(dev, "rtc-time : %d/%d/%d %d:%d\n",
132 (tm->tm_mon + 1), tm->tm_mday, (tm->tm_year + os_ref_year),
133 tm->tm_hour, tm->tm_min);
134}
135
136static int ricoh583_rtc_read_time(struct device *dev, struct rtc_time *tm)
137{
138 u8 buff[7];
139 int err;
140 err = ricoh583_read_regs(dev, rtc_seconds_reg, sizeof(buff), buff);
141 if (err < 0) {
142 dev_err(dev, "\n %s :: failed to read time\n", __FILE__);
143 return err;
144 }
145 convert_bcd_to_decimal(buff, sizeof(buff));
146 tm->tm_sec = buff[0];
147 tm->tm_min = buff[1];
148 tm->tm_hour = buff[2];
149 tm->tm_wday = buff[3];
150 tm->tm_mday = buff[4];
151 tm->tm_mon = buff[5] - 1;
152 tm->tm_year = buff[6] + rtc_year_offset;
153 print_time(dev, tm);
154 return ricoh583_rtc_valid_tm(dev, tm);
155}
156
157static int ricoh583_rtc_set_time(struct device *dev, struct rtc_time *tm)
158{
159 u8 buff[7];
160 int err;
161
162 print_time(dev, tm);
163 buff[0] = tm->tm_sec;
164 buff[1] = tm->tm_min;
165 buff[2] = tm->tm_hour;
166 buff[3] = tm->tm_wday;
167 buff[4] = tm->tm_mday;
168 buff[5] = tm->tm_mon + 1;
169 buff[6] = tm->tm_year - rtc_year_offset;
170
171 convert_decimal_to_bcd(buff, sizeof(buff));
172 err = ricoh583_write_regs(dev, rtc_seconds_reg, sizeof(buff), buff);
173 if (err < 0) {
174 dev_err(dev->parent, "\n failed to program new time\n");
175 return err;
176 }
177
178 return 0;
179}
180static int ricoh583_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm);
181
182static int ricoh583_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
183{
184 struct ricoh583_rtc *rtc = dev_get_drvdata(dev);
185 unsigned long seconds;
186 u8 buff[5];
187 int err;
188 struct rtc_time tm;
189
190 if (rtc->irq == -1)
191 return -EIO;
192
193 rtc_tm_to_time(&alrm->time, &seconds);
194 ricoh583_rtc_read_time(dev, &tm);
195 rtc_tm_to_time(&tm, &rtc->epoch_start);
196 /*
197 work around: As YAL does not provide the seconds register,
198 program minute register to next minute, in cases when alarm
199 is requested within a minute from the current time.
200 */
201 if (seconds - rtc->epoch_start < 60)
202 alrm->time.tm_min += 1;
203 dev_info(dev->parent, "\n setting alarm to requested time::\n");
204 print_time(dev->parent, &alrm->time);
205
206 if (WARN_ON(alrm->enabled && (seconds < rtc->epoch_start))) {
207 dev_err(dev->parent, "\n can't set alarm to requested time\n");
208 return -EINVAL;
209 }
210
211 if (alrm->enabled && !rtc->irq_en)
212 rtc->irq_en = true;
213 else if (!alrm->enabled && rtc->irq_en)
214 rtc->irq_en = false;
215
216 buff[0] = alrm->time.tm_min;
217 buff[1] = alrm->time.tm_hour;
218 buff[2] = alrm->time.tm_mday;
219 buff[3] = alrm->time.tm_mon + 1;
220 buff[4] = alrm->time.tm_year - rtc_year_offset;
221 convert_decimal_to_bcd(buff, sizeof(buff));
222 err = ricoh583_write_regs(dev, rtc_alarm_y, sizeof(buff), buff);
223 if (err) {
224 dev_err(dev->parent, "\n unable to set alarm\n");
225 return -EBUSY;
226 }
227 buff[0] = 0x20; /* to enable alarm_y */
228 buff[1] = 0x20; /* to enable 24-hour format */
229 err = ricoh583_write_regs(dev, rtc_ctrl1, 2, buff);
230 if (err) {
231 dev_err(dev, "failed programming rtc ctrl regs\n");
232 return -EBUSY;
233 }
234return err;
235}
236
237static int ricoh583_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
238{
239 u8 buff[5];
240 int err;
241
242 err = ricoh583_read_regs(dev, rtc_alarm_y, sizeof(buff), buff);
243 if (err)
244 return err;
245 convert_bcd_to_decimal(buff, sizeof(buff));
246
247 alrm->time.tm_min = buff[0];
248 alrm->time.tm_hour = buff[1];
249 alrm->time.tm_mday = buff[2];
250 alrm->time.tm_mon = buff[3] - 1;
251 alrm->time.tm_year = buff[4] + rtc_year_offset;
252
253 dev_info(dev->parent, "\n getting alarm time::\n");
254 print_time(dev, &alrm->time);
255
256 return 0;
257}
258
259static const struct rtc_class_ops ricoh583_rtc_ops = {
260 .read_time = ricoh583_rtc_read_time,
261 .set_time = ricoh583_rtc_set_time,
262 .set_alarm = ricoh583_rtc_set_alarm,
263 .read_alarm = ricoh583_rtc_read_alarm,
264};
265
266static irqreturn_t ricoh583_rtc_irq(int irq, void *data)
267{
268 struct device *dev = data;
269 struct ricoh583_rtc *rtc = dev_get_drvdata(dev);
270 u8 reg;
271 int err;
272
273 /* clear alarm-Y status bits.*/
274 err = ricoh583_read_regs(dev, rtc_ctrl2, 1, &reg);
275 if (err) {
276 dev_err(dev->parent, "unable to read rtc_ctrl2 reg\n");
277 return -EBUSY;
278 }
279 reg &= ~0x8;
280 err = ricoh583_write_regs(dev, rtc_ctrl2, 1, &reg);
281 if (err) {
282 dev_err(dev->parent, "unable to program rtc_status reg\n");
283 return -EBUSY;
284 }
285
286 rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
287 return IRQ_HANDLED;
288}
289
290static int __devinit ricoh583_rtc_probe(struct platform_device *pdev)
291{
292 struct ricoh583_rtc_platform_data *pdata = pdev->dev.platform_data;
293 struct ricoh583_rtc *rtc;
294 struct rtc_time tm;
295 int err;
296 u8 reg[2];
297 rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
298
299 if (!rtc)
300 return -ENOMEM;
301
302 rtc->irq = -1;
303
304 if (!pdata) {
305 dev_err(&pdev->dev, "no platform_data specified\n");
306 return -EINVAL;
307 }
308
309 if (pdata->irq < 0)
310 dev_err(&pdev->dev, "\n no irq specified, wakeup is disabled\n");
311
312 dev_set_drvdata(&pdev->dev, rtc);
313 device_init_wakeup(&pdev->dev, 1);
314 rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
315 &ricoh583_rtc_ops, THIS_MODULE);
316
317 if (IS_ERR(rtc->rtc)) {
318 err = PTR_ERR(rtc->rtc);
319 goto fail;
320 }
321 reg[0] = 0; /* clearing RTC Adjust register */
322 err = ricoh583_write_regs(&pdev->dev, rtc_adjust, 1, reg);
323 if (err) {
324 dev_err(&pdev->dev, "unable to program rtc_adjust reg\n");
325 return -EBUSY;
326 }
327
328 reg[0] = 0x20; /* to enable alarm_y */
329 reg[1] = 0x20; /* to enable 24-hour format */
330 err = ricoh583_write_regs(&pdev->dev, rtc_ctrl1, 2, reg);
331 if (err) {
332 dev_err(&pdev->dev, "failed rtc setup\n");
333 return -EBUSY;
334 }
335
336 ricoh583_rtc_read_time(&pdev->dev, &tm);
337 if (ricoh583_rtc_valid_tm(&pdev->dev, &tm)) {
338 if (pdata->time.tm_year < 2000 || pdata->time.tm_year > 2100) {
339 memset(&pdata->time, 0, sizeof(pdata->time));
340 pdata->time.tm_year = rtc_year_offset;
341 pdata->time.tm_mday = 1;
342 } else
343 pdata->time.tm_year -= os_ref_year;
344 ricoh583_rtc_set_time(&pdev->dev, &pdata->time);
345 }
346 if (pdata && (pdata->irq >= 0)) {
347 rtc->irq = pdata->irq;
348 err = request_threaded_irq(pdata->irq, NULL, ricoh583_rtc_irq,
349 IRQF_ONESHOT, "rtc_ricoh583",
350 &pdev->dev);
351 if (err) {
352 dev_err(&pdev->dev, "request IRQ:%d fail\n", rtc->irq);
353 rtc->irq = -1;
354 } else {
355 device_init_wakeup(&pdev->dev, 1);
356 enable_irq_wake(rtc->irq);
357 }
358 }
359 return 0;
360
361fail:
362 if (!IS_ERR_OR_NULL(rtc->rtc))
363 rtc_device_unregister(rtc->rtc);
364 kfree(rtc);
365 return err;
366}
367
368static int __devexit ricoh583_rtc_remove(struct platform_device *pdev)
369{
370 struct ricoh583_rtc *rtc = dev_get_drvdata(&pdev->dev);
371
372 if (rtc->irq != -1)
373 free_irq(rtc->irq, rtc);
374 rtc_device_unregister(rtc->rtc);
375 kfree(rtc);
376 return 0;
377}
378
379static struct platform_driver ricoh583_rtc_driver = {
380 .driver = {
381 .name = "rtc_ricoh583",
382 .owner = THIS_MODULE,
383 },
384 .probe = ricoh583_rtc_probe,
385 .remove = __devexit_p(ricoh583_rtc_remove),
386};
387
388static int __init ricoh583_rtc_init(void)
389{
390 return platform_driver_register(&ricoh583_rtc_driver);
391}
392module_init(ricoh583_rtc_init);
393
394static void __exit ricoh583_rtc_exit(void)
395{
396 platform_driver_unregister(&ricoh583_rtc_driver);
397}
398module_exit(ricoh583_rtc_exit);
399
400MODULE_DESCRIPTION("RICOH PMU ricoh583 RTC driver");
401MODULE_AUTHOR("NVIDIA Corporation");
402MODULE_LICENSE("GPL");
403MODULE_ALIAS("platform:rtc_ricoh583");
diff --git a/drivers/rtc/rtc-tps6591x.c b/drivers/rtc/rtc-tps6591x.c
new file mode 100644
index 00000000000..cab3e8874df
--- /dev/null
+++ b/drivers/rtc/rtc-tps6591x.c
@@ -0,0 +1,546 @@
1/*
2 * drivers/rtc/rtc_tps6591x.c
3 *
4 * RTC driver for TI TPS6591x
5 *
6 * Copyright (c) 2011, NVIDIA Corporation.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 */
22
23/* #define DEBUG 1 */
24/* #define VERBOSE_DEBUG 1 */
25
26#include <linux/device.h>
27#include <linux/err.h>
28#include <linux/init.h>
29#include <linux/kernel.h>
30#include <linux/mfd/tps6591x.h>
31#include <linux/platform_device.h>
32#include <linux/rtc.h>
33#include <linux/slab.h>
34
35#define RTC_CTRL 0x10
36#define RTC_STATUS 0x11
37#define RTC_SECONDS_REG 0x0
38#define RTC_ALARM 0x8
39#define RTC_INT 0x12
40#define RTC_RESET_STATUS 0x16
41#define RTC_BBCH_REG 0x39
42
43#define RTC_BBCH_SEL 0x02
44#define RTC_BBCH_EN 0x01
45#define ENABLE_ALARM_INT 0x8
46#define RTC_RESET_VALUE 0x80
47#define ALARM_INT_STATUS 0x40
48
49/*
50Linux RTC driver refers 1900 as base year in many calculations.
51(e.g. refer drivers/rtc/rtc-lib.c)
52*/
53#define OS_REF_YEAR 1900
54
55/*
56 PMU RTC have only 2 nibbles to store year information, so using an offset
57 of 100 to set the base year as 2000 for our driver.
58*/
59#define RTC_YEAR_OFFSET 100
60
61struct tps6591x_rtc {
62 unsigned long epoch_start;
63 int irq;
64 struct rtc_device *rtc;
65 bool irq_en;
66};
67
68static int tps6591x_read_regs(struct device *dev, int reg, int len,
69 uint8_t *val)
70{
71 int ret;
72
73 /* dummy read of STATUS_REG as per data sheet */
74 ret = tps6591x_reads(dev->parent, RTC_STATUS, 1, val);
75 if (ret < 0) {
76 dev_err(dev->parent, "\n %s failed reading from RTC_STATUS\n",
77 __func__);
78 WARN_ON(1);
79 return ret;
80 }
81
82 ret = tps6591x_reads(dev->parent, reg, len, val);
83 if (ret < 0) {
84 dev_err(dev->parent, "\n %s failed reading from 0x%02x\n",
85 __func__, reg);
86 WARN_ON(1);
87 return ret;
88 }
89 return 0;
90}
91
92static int tps6591x_write_regs(struct device *dev, int reg, int len,
93 uint8_t *val)
94{
95 int ret;
96 ret = tps6591x_writes(dev->parent, reg, len, val);
97 if (ret < 0) {
98 dev_err(dev->parent, "\n %s failed writing\n", __func__);
99 WARN_ON(1);
100 return ret;
101 }
102
103 return 0;
104}
105
106static int tps6591x_rtc_valid_tm(struct rtc_time *tm)
107{
108 if (tm->tm_year >= (RTC_YEAR_OFFSET + 99)
109 || tm->tm_mon >= 12
110 || tm->tm_mday < 1
111 || tm->tm_mday > rtc_month_days(tm->tm_mon, tm->tm_year + OS_REF_YEAR)
112 || tm->tm_hour >= 24
113 || tm->tm_min >= 60
114 || tm->tm_sec >= 60)
115 return -EINVAL;
116 return 0;
117}
118
119static u8 dec2bcd(u8 dec)
120{
121 return ((dec/10)<<4)+(dec%10);
122}
123
124static u8 bcd2dec(u8 bcd)
125{
126 return (bcd >> 4)*10+(bcd & 0xF);
127}
128
129static void convert_bcd_to_decimal(u8 *buf, u8 len)
130{
131 int i = 0;
132 for (i = 0; i < len; i++)
133 buf[i] = bcd2dec(buf[i]);
134}
135
136static void convert_decimal_to_bcd(u8 *buf, u8 len)
137{
138 int i = 0;
139 for (i = 0; i < len; i++)
140 buf[i] = dec2bcd(buf[i]);
141}
142
143static void print_time(struct device *dev, struct rtc_time *tm)
144{
145 dev_info(dev, "RTC Time : %d/%d/%d %d:%d:%d\n",
146 (tm->tm_mon + 1), tm->tm_mday, (tm->tm_year + OS_REF_YEAR),
147 tm->tm_hour, tm->tm_min , tm->tm_sec);
148}
149
150static int tps6591x_rtc_read_time(struct device *dev, struct rtc_time *tm)
151{
152 u8 buff[7];
153 int err;
154 err = tps6591x_read_regs(dev, RTC_SECONDS_REG, sizeof(buff), buff);
155 if (err < 0) {
156 dev_err(dev, "\n %s :: failed to read time\n", __FILE__);
157 return err;
158 }
159 convert_bcd_to_decimal(buff, sizeof(buff));
160 tm->tm_sec = buff[0];
161 tm->tm_min = buff[1];
162 tm->tm_hour = buff[2];
163 tm->tm_mday = buff[3];
164 tm->tm_mon = buff[4] - 1;
165 tm->tm_year = buff[5];
166 tm->tm_wday = buff[6];
167 print_time(dev, tm);
168 return tps6591x_rtc_valid_tm(tm);
169}
170
171static int tps6591x_rtc_stop(struct device *dev)
172{
173 u8 reg = 0;
174 u8 retries = 0;
175 int err;
176 do {
177 err = tps6591x_read_regs(dev, RTC_CTRL, 1, &reg);
178 if (err < 0) {
179 dev_err(dev->parent, "\n failed to read RTC_CTRL reg\n");
180 return err;
181 }
182
183 /* clear STOP bit alone */
184 reg &= ~0x1;
185
186 err = tps6591x_write_regs(dev, RTC_CTRL, 1, &reg);
187 if (err < 0) {
188 dev_err(dev->parent, "\n failed to program RTC_CTRL reg\n");
189 return err;
190 }
191
192 err = tps6591x_read_regs(dev, RTC_STATUS, 1, &reg);
193 if (err < 0) {
194 dev_err(dev->parent, "\n failed to read RTC_CTRL reg\n");
195 return err;
196 }
197 /* FixMe: Is allowing up to 5 retries sufficient?? */
198 if (retries++ == 5) {
199 dev_err(dev->parent, "\n failed to stop RTC\n");
200 return -EBUSY;
201 }
202 } while (reg & 2);
203 return 0;
204}
205
206static int tps6591x_rtc_start(struct device *dev)
207{
208 u8 reg = 0;
209 u8 retries = 0;
210 int err;
211
212 do {
213 err = tps6591x_read_regs(dev, RTC_CTRL, 1, &reg);
214 if (err < 0) {
215 dev_err(dev->parent, "\n failed to read RTC_CTRL reg\n");
216 return err;
217 }
218
219 /* set STOP bit alone */
220 reg |= 0x1;
221
222 err = tps6591x_write_regs(dev, RTC_CTRL, 1, &reg);
223 if (err < 0) {
224 dev_err(dev->parent, "\n failed to program RTC_CTRL reg\n");
225 return err;
226 }
227
228 err = tps6591x_read_regs(dev, RTC_STATUS, 1, &reg);
229 if (err < 0) {
230 dev_err(dev->parent, "\n failed to read RTC_CTRL reg\n");
231 return err;
232 }
233 /* FixMe: Is allowing up to 5 retries sufficient?? */
234 if (retries++ == 5) {
235 dev_err(dev->parent, "\n failed to stop RTC\n");
236 return -EBUSY;
237 }
238 } while (!(reg & 2));
239 return 0;
240}
241
242
243static int tps6591x_rtc_set_time(struct device *dev, struct rtc_time *tm)
244{
245 u8 buff[7];
246 int err;
247
248 buff[0] = tm->tm_sec;
249 buff[1] = tm->tm_min;
250 buff[2] = tm->tm_hour;
251 buff[3] = tm->tm_mday;
252 buff[4] = tm->tm_mon + 1;
253 buff[5] = tm->tm_year;
254 buff[6] = tm->tm_wday;
255
256 print_time(dev, tm);
257 convert_decimal_to_bcd(buff, sizeof(buff));
258 err = tps6591x_rtc_stop(dev);
259 if (err < 0) {
260 dev_err(dev->parent, "\n failed to clear RTC_ENABLE\n");
261 return err;
262 }
263
264 err = tps6591x_write_regs(dev, RTC_SECONDS_REG, sizeof(buff), buff);
265 if (err < 0) {
266 dev_err(dev->parent, "\n failed to program new time\n");
267 return err;
268 }
269
270 err = tps6591x_rtc_start(dev);
271 if (err < 0) {
272 dev_err(dev->parent, "\n failed to set RTC_ENABLE\n");
273 return err;
274 }
275
276 return 0;
277}
278
279static int tps6591x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
280{
281 struct tps6591x_rtc *rtc = dev_get_drvdata(dev);
282 unsigned long seconds;
283 u8 buff[6];
284 int err;
285 struct rtc_time tm;
286
287 if (rtc->irq == -1)
288 return -EIO;
289
290 dev_info(dev->parent, "\n setting alarm to requested time::\n");
291 print_time(dev->parent, &alrm->time);
292 rtc_tm_to_time(&alrm->time, &seconds);
293 tps6591x_rtc_read_time(dev, &tm);
294 rtc_tm_to_time(&tm, &rtc->epoch_start);
295
296 if (WARN_ON(alrm->enabled && (seconds < rtc->epoch_start))) {
297 dev_err(dev->parent, "\n can't set alarm to requested time\n");
298 return -EINVAL;
299 }
300
301 if (alrm->enabled && !rtc->irq_en) {
302 rtc->irq_en = true;
303 } else if (!alrm->enabled && rtc->irq_en) {
304 rtc->irq_en = false;
305 }
306
307 buff[0] = alrm->time.tm_sec;
308 buff[1] = alrm->time.tm_min;
309 buff[2] = alrm->time.tm_hour;
310 buff[3] = alrm->time.tm_mday;
311 buff[4] = alrm->time.tm_mon + 1;
312 buff[5] = alrm->time.tm_year;
313 convert_decimal_to_bcd(buff, sizeof(buff));
314 err = tps6591x_write_regs(dev, RTC_ALARM, sizeof(buff), buff);
315 if (err)
316 dev_err(dev->parent, "\n unable to program alarm\n");
317
318 return err;
319}
320
321static int tps6591x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
322{
323 u8 buff[6];
324 int err;
325
326 err = tps6591x_read_regs(dev, RTC_ALARM, sizeof(buff), buff);
327 if (err)
328 return err;
329 convert_bcd_to_decimal(buff, sizeof(buff));
330
331 alrm->time.tm_sec = buff[0];
332 alrm->time.tm_min = buff[1];
333 alrm->time.tm_hour = buff[2];
334 alrm->time.tm_mday = buff[3];
335 alrm->time.tm_mon = buff[4] - 1;
336 alrm->time.tm_year = buff[5];
337
338 dev_info(dev->parent, "\n getting alarm time::\n");
339 print_time(dev, &alrm->time);
340
341 return 0;
342}
343
344static int tps6591x_rtc_alarm_irq_enable(struct device *dev,
345 unsigned int enable)
346{
347 struct tps6591x_rtc *rtc = dev_get_drvdata(dev);
348 u8 reg;
349 int err;
350
351 if (rtc->irq == -1)
352 return -EIO;
353
354 if (enable) {
355 if (rtc->irq_en == true)
356 return 0;
357 err = tps6591x_read_regs(dev, RTC_INT, 1, &reg);
358 if (err)
359 return err;
360 reg |= 0x8;
361 err = tps6591x_write_regs(dev, RTC_INT, 1, &reg);
362 if (err)
363 return err;
364 rtc->irq_en = true;
365 } else {
366 if (rtc->irq_en == false)
367 return 0;
368 err = tps6591x_read_regs(dev, RTC_INT, 1, &reg);
369 if (err)
370 return err;
371 reg &= ~0x8;
372 err = tps6591x_write_regs(dev, RTC_INT, 1, &reg);
373 if (err)
374 return err;
375 rtc->irq_en = false;
376 }
377 return 0;
378}
379
380static const struct rtc_class_ops tps6591x_rtc_ops = {
381 .read_time = tps6591x_rtc_read_time,
382 .set_time = tps6591x_rtc_set_time,
383 .set_alarm = tps6591x_rtc_set_alarm,
384 .read_alarm = tps6591x_rtc_read_alarm,
385 .alarm_irq_enable = tps6591x_rtc_alarm_irq_enable,
386};
387
388static irqreturn_t tps6591x_rtc_irq(int irq, void *data)
389{
390 struct device *dev = data;
391 struct tps6591x_rtc *rtc = dev_get_drvdata(dev);
392 u8 reg;
393 int err;
394
395 /* clear Alarm status bits.*/
396 err = tps6591x_read_regs(dev, RTC_STATUS, 1, &reg);
397 if (err) {
398 dev_err(dev->parent, "unable to read RTC_STATUS reg\n");
399 return -EBUSY;
400 }
401
402 reg = ALARM_INT_STATUS;
403 err = tps6591x_write_regs(dev, RTC_STATUS, 1, &reg);
404 if (err) {
405 dev_err(dev->parent, "unable to program RTC_STATUS reg\n");
406 return -EBUSY;
407 }
408
409 rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
410 return IRQ_HANDLED;
411}
412
413static int __devinit tps6591x_rtc_probe(struct platform_device *pdev)
414{
415 struct tps6591x_rtc_platform_data *pdata = pdev->dev.platform_data;
416 struct tps6591x_rtc *rtc;
417 struct rtc_time tm;
418 int err;
419 u8 reg;
420
421 rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
422
423 if (!rtc)
424 return -ENOMEM;
425
426 rtc->irq = -1;
427
428 if (!pdata) {
429 dev_err(&pdev->dev, "no platform_data specified\n");
430 return -EINVAL;
431 }
432
433 if (pdata->irq < 0)
434 dev_err(&pdev->dev, "\n no IRQ specified, wakeup is disabled\n");
435
436 dev_set_drvdata(&pdev->dev, rtc);
437 device_init_wakeup(&pdev->dev, 1);
438 rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
439 &tps6591x_rtc_ops, THIS_MODULE);
440
441 if (IS_ERR(rtc->rtc)) {
442 err = PTR_ERR(rtc->rtc);
443 goto fail;
444 }
445
446 if ((int)pdev && (int)&pdev->dev)
447 err = tps6591x_read_regs(&pdev->dev, RTC_STATUS, 1, &reg);
448 else {
449 dev_err(&pdev->dev, "\n %s Input params incorrect\n", __func__);
450 return -EBUSY;
451 }
452 if (err) {
453 dev_err(&pdev->dev, "\n %s unable to read status\n", __func__);
454 return -EBUSY;
455 }
456
457 reg = RTC_BBCH_SEL | RTC_BBCH_EN;
458 tps6591x_write_regs(&pdev->dev, RTC_BBCH_REG, 1, &reg);
459 if (err) {
460 dev_err(&pdev->dev, "unable to program Charger reg\n");
461 return -EBUSY;
462 }
463
464 tps6591x_rtc_read_time(&pdev->dev, &tm);
465 if ((tm.tm_year < RTC_YEAR_OFFSET || tm.tm_year > (RTC_YEAR_OFFSET + 99))){
466 if (pdata->time.tm_year < 2000 || pdata->time.tm_year > 2100) {
467 memset(&pdata->time, 0, sizeof(pdata->time));
468 pdata->time.tm_year = RTC_YEAR_OFFSET;
469 pdata->time.tm_mday = 1;
470 } else
471 pdata->time.tm_year -= OS_REF_YEAR;
472 tps6591x_rtc_set_time(&pdev->dev, &pdata->time);
473 }
474
475 reg = ALARM_INT_STATUS;
476 err = tps6591x_write_regs(&pdev->dev, RTC_STATUS, 1, &reg);
477 if (err) {
478 dev_err(&pdev->dev, "unable to program RTC_STATUS reg\n");
479 return -EBUSY;
480 }
481
482 reg = ENABLE_ALARM_INT;
483 tps6591x_write_regs(&pdev->dev, RTC_INT, 1, &reg);
484 if (err) {
485 dev_err(&pdev->dev, "unable to program Interrupt Mask reg\n");
486 return -EBUSY;
487 }
488
489 if (pdata && (pdata->irq >= 0)) {
490 rtc->irq = pdata->irq;
491 err = request_threaded_irq(pdata->irq, NULL, tps6591x_rtc_irq,
492 IRQF_ONESHOT, "rtc_tps6591x",
493 &pdev->dev);
494 if (err) {
495 dev_err(&pdev->dev, "request IRQ:%d fail\n", rtc->irq);
496 rtc->irq = -1;
497 } else {
498 device_init_wakeup(&pdev->dev, 1);
499 enable_irq_wake(rtc->irq);
500 }
501 }
502 return 0;
503
504fail:
505 if (!IS_ERR_OR_NULL(rtc->rtc))
506 rtc_device_unregister(rtc->rtc);
507 kfree(rtc);
508 return err;
509}
510
511static int __devexit tps6591x_rtc_remove(struct platform_device *pdev)
512{
513 struct tps6591x_rtc *rtc = dev_get_drvdata(&pdev->dev);
514
515 if (rtc->irq != -1)
516 free_irq(rtc->irq, rtc);
517 rtc_device_unregister(rtc->rtc);
518 kfree(rtc);
519 return 0;
520}
521
522static struct platform_driver tps6591x_rtc_driver = {
523 .driver = {
524 .name = "rtc_tps6591x",
525 .owner = THIS_MODULE,
526 },
527 .probe = tps6591x_rtc_probe,
528 .remove = __devexit_p(tps6591x_rtc_remove),
529};
530
531static int __init tps6591x_rtc_init(void)
532{
533 return platform_driver_register(&tps6591x_rtc_driver);
534}
535module_init(tps6591x_rtc_init);
536
537static void __exit tps6591x_rtc_exit(void)
538{
539 platform_driver_unregister(&tps6591x_rtc_driver);
540}
541module_exit(tps6591x_rtc_exit);
542
543MODULE_DESCRIPTION("TI TPS6591x RTC driver");
544MODULE_AUTHOR("NVIDIA Corporation");
545MODULE_LICENSE("GPL");
546MODULE_ALIAS("platform:rtc_tps6591x");
diff --git a/drivers/rtc/rtc-tps80031.c b/drivers/rtc/rtc-tps80031.c
new file mode 100644
index 00000000000..70d6734a570
--- /dev/null
+++ b/drivers/rtc/rtc-tps80031.c
@@ -0,0 +1,449 @@
1/*
2 * drivers/rtc/rtc_tps80031.c
3 *
4 * RTC driver for TI TPS80031
5 *
6 * Copyright (c) 2011, NVIDIA Corporation.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 */
22
23/* #define DEBUG 1 */
24/* #define VERBOSE_DEBUG 1 */
25
26#include <linux/device.h>
27#include <linux/err.h>
28#include <linux/init.h>
29#include <linux/kernel.h>
30#include <linux/mfd/tps80031.h>
31#include <linux/platform_device.h>
32#include <linux/rtc.h>
33#include <linux/slab.h>
34
35#define RTC_CTRL 0x10
36#define RTC_STATUS 0x11
37#define RTC_SECONDS_REG 0x0
38#define RTC_ALARM 0x8
39#define RTC_INT 0x12
40#define RTC_RESET_STATUS 0x16
41
42#define ENABLE_ALARM_INT 0x8
43#define ALARM_INT_STATUS 0x40
44#define STOP_RTC 1
45
46/* Power on reset Values of RTC registers */
47#define RTC_POR_YEAR 0
48#define RTC_POR_MONTH 1
49#define RTC_POR_DAY 1
50
51/*
52Linux RTC driver refers 19th centaury as base year in many
53calculations. (e.g. refer drivers/rtc/rtc-lib.c)
54*/
55#define OS_REF_YEAR 1900
56
57/*
58 PMU RTC have only 2 nibbles to store year information, so using an
59 offset of 100 to set the base year as 2000 for our driver.
60*/
61#define RTC_YEAR_OFFSET 100
62
63struct tps80031_rtc {
64 unsigned long epoch_start;
65 int irq;
66 struct rtc_device *rtc;
67 u8 alarm_irq_enabled;
68};
69
70static int tps80031_read_regs(struct device *dev, int reg, int len,
71 uint8_t *val)
72{
73 int ret;
74
75 /* dummy read of STATUS_REG as per data sheet */
76 ret = tps80031_reads(dev->parent, 1, RTC_STATUS, 1, val);
77 if (ret < 0) {
78 dev_err(dev->parent, "failed reading RTC_STATUS\n");
79 WARN_ON(1);
80 return ret;
81 }
82
83 ret = tps80031_reads(dev->parent, 1, reg, len, val);
84 if (ret < 0) {
85 dev_err(dev->parent, "failed reading from reg %d\n", reg);
86 WARN_ON(1);
87 return ret;
88 }
89 return 0;
90}
91
92static int tps80031_write_regs(struct device *dev, int reg, int len,
93 uint8_t *val)
94{
95 int ret;
96 ret = tps80031_writes(dev->parent, 1, reg, len, val);
97 if (ret < 0) {
98 dev_err(dev->parent, "failed writing reg: %d\n", reg);
99 WARN_ON(1);
100 return ret;
101 }
102
103 return 0;
104}
105
106static u8 dec2bcd(u8 dec)
107{
108 return ((dec/10)<<4)+(dec%10);
109}
110
111static u8 bcd2dec(u8 bcd)
112{
113 return (bcd >> 4)*10+(bcd & 0xF);
114}
115
116static void convert_bcd_to_decimal(u8 *buf, u8 len)
117{
118 int i = 0;
119 for (i = 0; i < len; i++)
120 buf[i] = bcd2dec(buf[i]);
121}
122
123static void convert_decimal_to_bcd(u8 *buf, u8 len)
124{
125 int i = 0;
126 for (i = 0; i < len; i++)
127 buf[i] = dec2bcd(buf[i]);
128}
129
130static int tps80031_rtc_read_time(struct device *dev, struct rtc_time *tm)
131{
132 u8 buff[7];
133 int err;
134 err = tps80031_read_regs(dev, RTC_SECONDS_REG, sizeof(buff), buff);
135 if (err < 0) {
136 dev_err(dev->parent, "failed reading time\n");
137 return err;
138 }
139 convert_bcd_to_decimal(buff, sizeof(buff));
140 tm->tm_sec = buff[0];
141 tm->tm_min = buff[1];
142 tm->tm_hour = buff[2];
143 tm->tm_mday = buff[3];
144 tm->tm_mon = buff[4] - 1;
145 tm->tm_year = buff[5] + RTC_YEAR_OFFSET;
146 tm->tm_wday = buff[6];
147 return 0;
148}
149
150static int tps80031_rtc_stop(struct device *dev)
151{
152 int err;
153 err = tps80031_clr_bits(dev->parent, 1, RTC_CTRL, STOP_RTC);
154 if (err < 0)
155 dev_err(dev->parent, "failed to stop RTC. err: %d\n", err);
156 return err;
157}
158
159static int tps80031_rtc_start(struct device *dev)
160{
161 int err;
162 err = tps80031_set_bits(dev->parent, 1, RTC_CTRL, STOP_RTC);
163 if (err < 0)
164 dev_err(dev->parent, "failed to start RTC. err: %d\n", err);
165 return err;
166}
167
168
169static int tps80031_rtc_set_time(struct device *dev, struct rtc_time *tm)
170{
171 u8 buff[7];
172 int err;
173
174 buff[0] = tm->tm_sec;
175 buff[1] = tm->tm_min;
176 buff[2] = tm->tm_hour;
177 buff[3] = tm->tm_mday;
178 buff[4] = tm->tm_mon + 1;
179 buff[5] = tm->tm_year % RTC_YEAR_OFFSET;
180 buff[6] = tm->tm_wday;
181
182 convert_decimal_to_bcd(buff, sizeof(buff));
183 err = tps80031_rtc_stop(dev);
184 if (err < 0)
185 return err;
186
187 err = tps80031_write_regs(dev, RTC_SECONDS_REG, sizeof(buff), buff);
188 if (err < 0) {
189 dev_err(dev->parent, "failed to program new time\n");
190 return err;
191 }
192
193 err = tps80031_rtc_start(dev);
194 return err;
195}
196
197static int tps80031_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
198{
199 struct tps80031_rtc *rtc = dev_get_drvdata(dev);
200 unsigned long seconds;
201 u8 buff[6];
202 int err;
203 struct rtc_time tm;
204
205 if (rtc->irq == -1)
206 return -EIO;
207
208 rtc_tm_to_time(&alrm->time, &seconds);
209 tps80031_rtc_read_time(dev, &tm);
210 rtc_tm_to_time(&tm, &rtc->epoch_start);
211
212 if (WARN_ON(alrm->enabled && (seconds < rtc->epoch_start))) {
213 dev_err(dev->parent, "can't set alarm to requested time\n");
214 return -EINVAL;
215 }
216
217 buff[0] = alrm->time.tm_sec;
218 buff[1] = alrm->time.tm_min;
219 buff[2] = alrm->time.tm_hour;
220 buff[3] = alrm->time.tm_mday;
221 buff[4] = alrm->time.tm_mon + 1;
222 buff[5] = alrm->time.tm_year % RTC_YEAR_OFFSET;
223 convert_decimal_to_bcd(buff, sizeof(buff));
224 err = tps80031_write_regs(dev, RTC_ALARM, sizeof(buff), buff);
225 if (err)
226 dev_err(dev->parent, "unable to program alarm\n");
227
228 return err;
229}
230
231static int tps80031_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
232{
233 u8 buff[6];
234 int err;
235
236 err = tps80031_read_regs(dev, RTC_ALARM, sizeof(buff), buff);
237 if (err)
238 return err;
239 convert_bcd_to_decimal(buff, sizeof(buff));
240
241 alrm->time.tm_sec = buff[0];
242 alrm->time.tm_min = buff[1];
243 alrm->time.tm_hour = buff[2];
244 alrm->time.tm_mday = buff[3];
245 alrm->time.tm_mon = buff[4] - 1;
246 alrm->time.tm_year = buff[5] + RTC_YEAR_OFFSET;
247
248 return 0;
249}
250
251static int tps80031_rtc_alarm_irq_enable(struct device *dev,
252 unsigned int enable)
253{
254 struct tps80031_rtc *rtc = dev_get_drvdata(dev);
255 int err;
256 struct device *p = dev->parent;
257
258 if (rtc->irq == -1)
259 return -EIO;
260
261 if (enable) {
262 if (rtc->alarm_irq_enabled)
263 return 0;
264
265 err = tps80031_set_bits(p, 1, RTC_INT, ENABLE_ALARM_INT);
266 if (err < 0) {
267 dev_err(p, "failed to set ALRM int. err: %d\n", err);
268 return err;
269 } else
270 rtc->alarm_irq_enabled = 1;
271 } else {
272 if(!rtc->alarm_irq_enabled)
273 return 0;
274 err = tps80031_clr_bits(p, 1, RTC_INT, ENABLE_ALARM_INT);
275 if (err < 0) {
276 dev_err(p, "failed to clear ALRM int. err: %d\n", err);
277 return err;
278 } else
279 rtc->alarm_irq_enabled = 0;
280 }
281 return 0;
282}
283
284static const struct rtc_class_ops tps80031_rtc_ops = {
285 .read_time = tps80031_rtc_read_time,
286 .set_time = tps80031_rtc_set_time,
287 .set_alarm = tps80031_rtc_set_alarm,
288 .read_alarm = tps80031_rtc_read_alarm,
289 .alarm_irq_enable = tps80031_rtc_alarm_irq_enable,
290};
291
292static irqreturn_t tps80031_rtc_irq(int irq, void *data)
293{
294 struct device *dev = data;
295 struct tps80031_rtc *rtc = dev_get_drvdata(dev);
296 u8 reg;
297 int err;
298
299 /* clear Alarm status bits.*/
300 err = tps80031_read_regs(dev, RTC_STATUS, 1, &reg);
301 if (err) {
302 dev_err(dev->parent, "unable to read RTC_STATUS reg\n");
303 return -EBUSY;
304 }
305
306 err = tps80031_force_update(dev->parent, 1, RTC_STATUS,
307 ALARM_INT_STATUS, ALARM_INT_STATUS);
308 if (err) {
309 dev_err(dev->parent, "unable to set Alarm INT\n");
310 return -EBUSY;
311 }
312
313 rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
314 return IRQ_HANDLED;
315}
316
317static int __devinit tps80031_rtc_probe(struct platform_device *pdev)
318{
319 struct tps80031_rtc_platform_data *pdata = pdev->dev.platform_data;
320 struct tps80031_rtc *rtc;
321 struct rtc_time tm;
322 int err;
323 u8 reg;
324
325 if (!pdata) {
326 dev_err(&pdev->dev, "no platform_data specified\n");
327 return -EINVAL;
328 }
329
330 rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
331 if (!rtc)
332 return -ENOMEM;
333
334 rtc->irq = -1;
335 if (pdata->irq < 0)
336 dev_err(&pdev->dev, "no IRQ specified, wakeup is disabled\n");
337
338 rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
339 &tps80031_rtc_ops, THIS_MODULE);
340
341 if (IS_ERR(rtc->rtc)) {
342 err = PTR_ERR(rtc->rtc);
343 goto fail;
344 }
345
346 if ((int)pdev && (int)&pdev->dev)
347 err = tps80031_read_regs(&pdev->dev, RTC_STATUS, 1, &reg);
348 else {
349 dev_err(&pdev->dev, "%s Input params incorrect\n", __func__);
350 err = -EBUSY;
351 goto fail;
352 }
353
354 if (err) {
355 dev_err(&pdev->dev, "%s unable to read status\n", __func__);
356 err = -EBUSY;
357 goto fail;
358 }
359
360 /* If RTC have POR values, set time using platform data*/
361 tps80031_rtc_read_time(&pdev->dev, &tm);
362 if ((tm.tm_year == RTC_YEAR_OFFSET + RTC_POR_YEAR) &&
363 (tm.tm_mon == (RTC_POR_MONTH - 1)) &&
364 (tm.tm_mday == RTC_POR_DAY)) {
365 if (pdata->time.tm_year < 2000 ||
366 pdata->time.tm_year > 2100) {
367 dev_err(&pdev->dev, "Invalid platform data\n");
368 memset(&pdata->time, 0, sizeof(pdata->time));
369 pdata->time.tm_year = 2011;
370 pdata->time.tm_mday = 1;
371 }
372 tps80031_rtc_set_time(&pdev->dev, &pdata->time);
373 }
374
375 reg = ALARM_INT_STATUS;
376 err = tps80031_write_regs(&pdev->dev, RTC_STATUS, 1, &reg);
377 if (err) {
378 dev_err(&pdev->dev, "unable to program RTC_STATUS reg\n");
379 return -EBUSY;
380 }
381
382 err = tps80031_set_bits(pdev->dev.parent, 1, RTC_INT, ENABLE_ALARM_INT);
383 if (err) {
384 dev_err(&pdev->dev, "unable to program Interrupt Mask reg\n");
385 err = -EBUSY;
386 rtc->alarm_irq_enabled = 0;
387 goto fail;
388 } else
389 rtc->alarm_irq_enabled = 1;
390
391 dev_set_drvdata(&pdev->dev, rtc);
392 if (pdata && (pdata->irq >= 0)) {
393 rtc->irq = pdata->irq;
394 err = request_threaded_irq(pdata->irq, NULL, tps80031_rtc_irq,
395 IRQF_ONESHOT, "rtc_tps80031",
396 &pdev->dev);
397 if (err) {
398 dev_err(&pdev->dev, "request IRQ:%d fail\n", rtc->irq);
399 rtc->irq = -1;
400 } else {
401 device_init_wakeup(&pdev->dev, 1);
402 enable_irq_wake(rtc->irq);
403 }
404 }
405 return 0;
406
407fail:
408 if (!IS_ERR_OR_NULL(rtc->rtc))
409 rtc_device_unregister(rtc->rtc);
410 kfree(rtc);
411 return err;
412}
413
414static int __devexit tps80031_rtc_remove(struct platform_device *pdev)
415{
416 struct tps80031_rtc *rtc = dev_get_drvdata(&pdev->dev);
417
418 if (rtc->irq != -1)
419 free_irq(rtc->irq, rtc);
420 rtc_device_unregister(rtc->rtc);
421 kfree(rtc);
422 return 0;
423}
424
425static struct platform_driver tps80031_rtc_driver = {
426 .driver = {
427 .name = "rtc_tps80031",
428 .owner = THIS_MODULE,
429 },
430 .probe = tps80031_rtc_probe,
431 .remove = __devexit_p(tps80031_rtc_remove),
432};
433
434static int __init tps80031_rtc_init(void)
435{
436 return platform_driver_register(&tps80031_rtc_driver);
437}
438module_init(tps80031_rtc_init);
439
440static void __exit tps80031_rtc_exit(void)
441{
442 platform_driver_unregister(&tps80031_rtc_driver);
443}
444module_exit(tps80031_rtc_exit);
445
446MODULE_DESCRIPTION("TI TPS80031 RTC driver");
447MODULE_AUTHOR("NVIDIA Corporation");
448MODULE_LICENSE("GPL");
449MODULE_ALIAS("platform:rtc_tps80031");
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-26 20:29:08 -0500