[mirror_ubuntu-bionic-kernel.git] / drivers / rtc / rtc-pcf50633.c

/* NXP PCF50633 RTC Driver
 *
 * (C) 2006-2008 by Openmoko, Inc.
 * Author: Balaji Rao <balajirrao@openmoko.org>
 * All rights reserved.
 *
 * Broken down from monstrous PCF50633 driver mainly by
 * Harald Welte, Andy Green and Werner Almesberger
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <linux/bcd.h>
#include <linux/err.h>

#include <linux/mfd/pcf50633/core.h>

#define PCF50633_REG_RTCSC	0x59 /* Second */
#define PCF50633_REG_RTCMN	0x5a /* Minute */
#define PCF50633_REG_RTCHR	0x5b /* Hour */
#define PCF50633_REG_RTCWD	0x5c /* Weekday */
#define PCF50633_REG_RTCDT	0x5d /* Day */
#define PCF50633_REG_RTCMT	0x5e /* Month */
#define PCF50633_REG_RTCYR	0x5f /* Year */
#define PCF50633_REG_RTCSCA	0x60 /* Alarm Second */
#define PCF50633_REG_RTCMNA	0x61 /* Alarm Minute */
#define PCF50633_REG_RTCHRA	0x62 /* Alarm Hour */
#define PCF50633_REG_RTCWDA	0x63 /* Alarm Weekday */
#define PCF50633_REG_RTCDTA	0x64 /* Alarm Day */
#define PCF50633_REG_RTCMTA	0x65 /* Alarm Month */
#define PCF50633_REG_RTCYRA	0x66 /* Alarm Year */

enum pcf50633_time_indexes {
	PCF50633_TI_SEC,
	PCF50633_TI_MIN,
	PCF50633_TI_HOUR,
	PCF50633_TI_WKDAY,
	PCF50633_TI_DAY,
	PCF50633_TI_MONTH,
	PCF50633_TI_YEAR,
	PCF50633_TI_EXTENT /* always last */
};

struct pcf50633_time {
	u_int8_t time[PCF50633_TI_EXTENT];
};

struct pcf50633_rtc {
	int alarm_enabled;
	int second_enabled;

	struct pcf50633 *pcf;
	struct rtc_device *rtc_dev;
};

static void pcf2rtc_time(struct rtc_time *rtc, struct pcf50633_time *pcf)
{
	rtc->tm_sec = bcd2bin(pcf->time[PCF50633_TI_SEC]);
	rtc->tm_min = bcd2bin(pcf->time[PCF50633_TI_MIN]);
	rtc->tm_hour = bcd2bin(pcf->time[PCF50633_TI_HOUR]);
	rtc->tm_wday = bcd2bin(pcf->time[PCF50633_TI_WKDAY]);
	rtc->tm_mday = bcd2bin(pcf->time[PCF50633_TI_DAY]);
	rtc->tm_mon = bcd2bin(pcf->time[PCF50633_TI_MONTH]);
	rtc->tm_year = bcd2bin(pcf->time[PCF50633_TI_YEAR]) + 100;
}

static void rtc2pcf_time(struct pcf50633_time *pcf, struct rtc_time *rtc)
{
	pcf->time[PCF50633_TI_SEC] = bin2bcd(rtc->tm_sec);
	pcf->time[PCF50633_TI_MIN] = bin2bcd(rtc->tm_min);
	pcf->time[PCF50633_TI_HOUR] = bin2bcd(rtc->tm_hour);
	pcf->time[PCF50633_TI_WKDAY] = bin2bcd(rtc->tm_wday);
	pcf->time[PCF50633_TI_DAY] = bin2bcd(rtc->tm_mday);
	pcf->time[PCF50633_TI_MONTH] = bin2bcd(rtc->tm_mon);
	pcf->time[PCF50633_TI_YEAR] = bin2bcd(rtc->tm_year % 100);
}

static int
pcf50633_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
	struct pcf50633_rtc *rtc = dev_get_drvdata(dev);
	int err;

	if (enabled)
		err = pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
	else
		err = pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);

	if (err < 0)
		return err;

	rtc->alarm_enabled = enabled;

	return 0;
}

static int
pcf50633_rtc_update_irq_enable(struct device *dev, unsigned int enabled)
{
	struct pcf50633_rtc *rtc = dev_get_drvdata(dev);
	int err;

	if (enabled)
		err = pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_SECOND);
	else
		err = pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_SECOND);

	if (err < 0)
		return err;

	rtc->second_enabled = enabled;

	return 0;
}

static int pcf50633_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
	struct pcf50633_rtc *rtc;
	struct pcf50633_time pcf_tm;
	int ret;

	rtc = dev_get_drvdata(dev);

	ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSC,
					    PCF50633_TI_EXTENT,
					    &pcf_tm.time[0]);
	if (ret != PCF50633_TI_EXTENT) {
		dev_err(dev, "Failed to read time\n");
		return -EIO;
	}

	dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
		pcf_tm.time[PCF50633_TI_DAY],
		pcf_tm.time[PCF50633_TI_MONTH],
		pcf_tm.time[PCF50633_TI_YEAR],
		pcf_tm.time[PCF50633_TI_HOUR],
		pcf_tm.time[PCF50633_TI_MIN],
		pcf_tm.time[PCF50633_TI_SEC]);

	pcf2rtc_time(tm, &pcf_tm);

	dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
		tm->tm_mday, tm->tm_mon, tm->tm_year,
		tm->tm_hour, tm->tm_min, tm->tm_sec);

	return rtc_valid_tm(tm);
}

static int pcf50633_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
	struct pcf50633_rtc *rtc;
	struct pcf50633_time pcf_tm;
	int second_masked, alarm_masked, ret = 0;

	rtc = dev_get_drvdata(dev);

	dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
		tm->tm_mday, tm->tm_mon, tm->tm_year,
		tm->tm_hour, tm->tm_min, tm->tm_sec);

	rtc2pcf_time(&pcf_tm, tm);

	dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
		pcf_tm.time[PCF50633_TI_DAY],
		pcf_tm.time[PCF50633_TI_MONTH],
		pcf_tm.time[PCF50633_TI_YEAR],
		pcf_tm.time[PCF50633_TI_HOUR],
		pcf_tm.time[PCF50633_TI_MIN],
		pcf_tm.time[PCF50633_TI_SEC]);


	second_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_SECOND);
	alarm_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_ALARM);

	if (!second_masked)
		pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_SECOND);
	if (!alarm_masked)
		pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);

	/* Returns 0 on success */
	ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSC,
					     PCF50633_TI_EXTENT,
					     &pcf_tm.time[0]);

	if (!second_masked)
		pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_SECOND);
	if (!alarm_masked)
		pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);

	return ret;
}

static int pcf50633_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct pcf50633_rtc *rtc;
	struct pcf50633_time pcf_tm;
	int ret = 0;

	rtc = dev_get_drvdata(dev);

	alrm->enabled = rtc->alarm_enabled;

	ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSCA,
				PCF50633_TI_EXTENT, &pcf_tm.time[0]);
	if (ret != PCF50633_TI_EXTENT) {
		dev_err(dev, "Failed to read time\n");
		return -EIO;
	}

	pcf2rtc_time(&alrm->time, &pcf_tm);

	return rtc_valid_tm(&alrm->time);
}

static int pcf50633_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct pcf50633_rtc *rtc;
	struct pcf50633_time pcf_tm;
	int alarm_masked, ret = 0;

	rtc = dev_get_drvdata(dev);

	rtc2pcf_time(&pcf_tm, &alrm->time);

	/* do like mktime does and ignore tm_wday */
	pcf_tm.time[PCF50633_TI_WKDAY] = 7;

	alarm_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_ALARM);

	/* disable alarm interrupt */
	if (!alarm_masked)
		pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);

	/* Returns 0 on success */
	ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSCA,
				PCF50633_TI_EXTENT, &pcf_tm.time[0]);

	if (!alarm_masked)
		pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);

	return ret;
}

static struct rtc_class_ops pcf50633_rtc_ops = {
	.read_time		= pcf50633_rtc_read_time,
	.set_time		= pcf50633_rtc_set_time,
	.read_alarm		= pcf50633_rtc_read_alarm,
	.set_alarm		= pcf50633_rtc_set_alarm,
	.alarm_irq_enable 	= pcf50633_rtc_alarm_irq_enable,
	.update_irq_enable 	= pcf50633_rtc_update_irq_enable,
};

static void pcf50633_rtc_irq(int irq, void *data)
{
	struct pcf50633_rtc *rtc = data;

	switch (irq) {
	case PCF50633_IRQ_ALARM:
		rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF);
		break;
	case PCF50633_IRQ_SECOND:
		rtc_update_irq(rtc->rtc_dev, 1, RTC_UF | RTC_IRQF);
		break;
	}
}

static int __devinit pcf50633_rtc_probe(struct platform_device *pdev)
{
	struct pcf50633_subdev_pdata *pdata;
	struct pcf50633_rtc *rtc;


	rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
	if (!rtc)
		return -ENOMEM;

	pdata = pdev->dev.platform_data;
	rtc->pcf = pdata->pcf;
	platform_set_drvdata(pdev, rtc);
	rtc->rtc_dev = rtc_device_register("pcf50633-rtc", &pdev->dev,
				&pcf50633_rtc_ops, THIS_MODULE);

	if (IS_ERR(rtc->rtc_dev)) {
		kfree(rtc);
		return PTR_ERR(rtc->rtc_dev);
	}

	pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_ALARM,
					pcf50633_rtc_irq, rtc);
	pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_SECOND,
					pcf50633_rtc_irq, rtc);

	return 0;
}

static int __devexit pcf50633_rtc_remove(struct platform_device *pdev)
{
	struct pcf50633_rtc *rtc;

	rtc = platform_get_drvdata(pdev);

	pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_ALARM);
	pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_SECOND);

	rtc_device_unregister(rtc->rtc_dev);
	kfree(rtc);

	return 0;
}

static struct platform_driver pcf50633_rtc_driver = {
	.driver = {
		.name = "pcf50633-rtc",
	},
	.probe = pcf50633_rtc_probe,
	.remove = __devexit_p(pcf50633_rtc_remove),
};

static int __init pcf50633_rtc_init(void)
{
	return platform_driver_register(&pcf50633_rtc_driver);
}
module_init(pcf50633_rtc_init);

static void __exit pcf50633_rtc_exit(void)
{
	platform_driver_unregister(&pcf50633_rtc_driver);
}
module_exit(pcf50633_rtc_exit);

MODULE_DESCRIPTION("PCF50633 RTC driver");
MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_LICENSE("GPL");
Commit	Line	Data
eae854b2 BR	1	/* NXP PCF50633 RTC Driver
	2	*
	3	* (C) 2006-2008 by Openmoko, Inc.
	4	* Author: Balaji Rao <balajirrao@openmoko.org>
	5	* All rights reserved.
	6	*
	7	* Broken down from monstrous PCF50633 driver mainly by
	8	* Harald Welte, Andy Green and Werner Almesberger
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the
	12	* Free Software Foundation; either version 2 of the License, or (at your
	13	* option) any later version.
	14	*
	15	*/
	16
	17	#include <linux/kernel.h>
	18	#include <linux/module.h>
	19	#include <linux/init.h>
	20	#include <linux/device.h>
	21	#include <linux/platform_device.h>
	22	#include <linux/rtc.h>
	23	#include <linux/bcd.h>
	24	#include <linux/err.h>
	25
	26	#include <linux/mfd/pcf50633/core.h>
	27
	28	#define PCF50633_REG_RTCSC 0x59 /* Second */
	29	#define PCF50633_REG_RTCMN 0x5a /* Minute */
	30	#define PCF50633_REG_RTCHR 0x5b /* Hour */
	31	#define PCF50633_REG_RTCWD 0x5c /* Weekday */
	32	#define PCF50633_REG_RTCDT 0x5d /* Day */
	33	#define PCF50633_REG_RTCMT 0x5e /* Month */
	34	#define PCF50633_REG_RTCYR 0x5f /* Year */
	35	#define PCF50633_REG_RTCSCA 0x60 /* Alarm Second */
	36	#define PCF50633_REG_RTCMNA 0x61 /* Alarm Minute */
	37	#define PCF50633_REG_RTCHRA 0x62 /* Alarm Hour */
	38	#define PCF50633_REG_RTCWDA 0x63 /* Alarm Weekday */
	39	#define PCF50633_REG_RTCDTA 0x64 /* Alarm Day */
	40	#define PCF50633_REG_RTCMTA 0x65 /* Alarm Month */
	41	#define PCF50633_REG_RTCYRA 0x66 /* Alarm Year */
	42
	43	enum pcf50633_time_indexes {
	44	PCF50633_TI_SEC,
	45	PCF50633_TI_MIN,
	46	PCF50633_TI_HOUR,
	47	PCF50633_TI_WKDAY,
	48	PCF50633_TI_DAY,
	49	PCF50633_TI_MONTH,
	50	PCF50633_TI_YEAR,
	51	PCF50633_TI_EXTENT /* always last */
	52	};
	53
	54	struct pcf50633_time {
	55	u_int8_t time[PCF50633_TI_EXTENT];
	56	};
	57
	58	struct pcf50633_rtc {
	59	int alarm_enabled;
	60	int second_enabled;
	61
	62	struct pcf50633 *pcf;
	63	struct rtc_device *rtc_dev;
	64	};
65
66	static void pcf2rtc_time(struct rtc_time rtc, struct pcf50633_time pcf)
67	{
68	rtc->tm_sec = bcd2bin(pcf->time[PCF50633_TI_SEC]);
69	rtc->tm_min = bcd2bin(pcf->time[PCF50633_TI_MIN]);
70	rtc->tm_hour = bcd2bin(pcf->time[PCF50633_TI_HOUR]);
71	rtc->tm_wday = bcd2bin(pcf->time[PCF50633_TI_WKDAY]);
72	rtc->tm_mday = bcd2bin(pcf->time[PCF50633_TI_DAY]);
73	rtc->tm_mon = bcd2bin(pcf->time[PCF50633_TI_MONTH]);
74	rtc->tm_year = bcd2bin(pcf->time[PCF50633_TI_YEAR]) + 100;
75	}
76
77	static void rtc2pcf_time(struct pcf50633_time pcf, struct rtc_time rtc)
78	{
79	pcf->time[PCF50633_TI_SEC] = bin2bcd(rtc->tm_sec);
80	pcf->time[PCF50633_TI_MIN] = bin2bcd(rtc->tm_min);
81	pcf->time[PCF50633_TI_HOUR] = bin2bcd(rtc->tm_hour);
82	pcf->time[PCF50633_TI_WKDAY] = bin2bcd(rtc->tm_wday);
83	pcf->time[PCF50633_TI_DAY] = bin2bcd(rtc->tm_mday);
84	pcf->time[PCF50633_TI_MONTH] = bin2bcd(rtc->tm_mon);
85	pcf->time[PCF50633_TI_YEAR] = bin2bcd(rtc->tm_year % 100);
86	}
87
88	static int
89	pcf50633_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
90	{
91	struct pcf50633_rtc *rtc = dev_get_drvdata(dev);
92	int err;
93
94	if (enabled)
95	err = pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
96	else
97	err = pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);
98
99	if (err < 0)
100	return err;
101
102	rtc->alarm_enabled = enabled;
103
104	return 0;
105	}
106
107	static int
108	pcf50633_rtc_update_irq_enable(struct device *dev, unsigned int enabled)
109	{
110	struct pcf50633_rtc *rtc = dev_get_drvdata(dev);
111	int err;
112
113	if (enabled)
114	err = pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_SECOND);
115	else
116	err = pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_SECOND);
117
118	if (err < 0)
119	return err;
120
121	rtc->second_enabled = enabled;
122
123	return 0;
124	}
125
126	static int pcf50633_rtc_read_time(struct device dev, struct rtc_time tm)
127	{
128	struct pcf50633_rtc *rtc;
129	struct pcf50633_time pcf_tm;
130	int ret;
131
132	rtc = dev_get_drvdata(dev);
133
134	ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSC,
135	PCF50633_TI_EXTENT,
136	&pcf_tm.time[0]);
137	if (ret != PCF50633_TI_EXTENT) {
138	dev_err(dev, "Failed to read time\n");
139	return -EIO;
140	}
141
142	dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
143	pcf_tm.time[PCF50633_TI_DAY],
144	pcf_tm.time[PCF50633_TI_MONTH],
145	pcf_tm.time[PCF50633_TI_YEAR],
146	pcf_tm.time[PCF50633_TI_HOUR],
147	pcf_tm.time[PCF50633_TI_MIN],
148	pcf_tm.time[PCF50633_TI_SEC]);
149
150	pcf2rtc_time(tm, &pcf_tm);
151
152	dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
153	tm->tm_mday, tm->tm_mon, tm->tm_year,
154	tm->tm_hour, tm->tm_min, tm->tm_sec);
155
156	return rtc_valid_tm(tm);
157	}
158
159	static int pcf50633_rtc_set_time(struct device dev, struct rtc_time tm)
160	{
161	struct pcf50633_rtc *rtc;
162	struct pcf50633_time pcf_tm;
163	int second_masked, alarm_masked, ret = 0;
164
165	rtc = dev_get_drvdata(dev);
166
167	dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
168	tm->tm_mday, tm->tm_mon, tm->tm_year,
169	tm->tm_hour, tm->tm_min, tm->tm_sec);
170
171	rtc2pcf_time(&pcf_tm, tm);
172
173	dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
174	pcf_tm.time[PCF50633_TI_DAY],
175	pcf_tm.time[PCF50633_TI_MONTH],
176	pcf_tm.time[PCF50633_TI_YEAR],
177	pcf_tm.time[PCF50633_TI_HOUR],
178	pcf_tm.time[PCF50633_TI_MIN],
179	pcf_tm.time[PCF50633_TI_SEC]);
180
181
182	second_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_SECOND);
183	alarm_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_ALARM);
184
185	if (!second_masked)
186	pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_SECOND);
187	if (!alarm_masked)
188	pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);
189
190	/* Returns 0 on success */
191	ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSC,
192	PCF50633_TI_EXTENT,
193	&pcf_tm.time[0]);
194
195	if (!second_masked)
196	pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_SECOND);
197	if (!alarm_masked)
198	pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
199
200	return ret;
201	}
202
203	static int pcf50633_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
204	{
205	struct pcf50633_rtc *rtc;
206	struct pcf50633_time pcf_tm;
207	int ret = 0;
208
209	rtc = dev_get_drvdata(dev);
210
211	alrm->enabled = rtc->alarm_enabled;
212
213	ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSCA,
214	PCF50633_TI_EXTENT, &pcf_tm.time[0]);
215	if (ret != PCF50633_TI_EXTENT) {
216	dev_err(dev, "Failed to read time\n");
217	return -EIO;
218	}
219
220	pcf2rtc_time(&alrm->time, &pcf_tm);
221
222	return rtc_valid_tm(&alrm->time);
223	}
224
225	static int pcf50633_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
226	{
227	struct pcf50633_rtc *rtc;
228	struct pcf50633_time pcf_tm;
229	int alarm_masked, ret = 0;
230
231	rtc = dev_get_drvdata(dev);
232
233	rtc2pcf_time(&pcf_tm, &alrm->time);
234
235	/* do like mktime does and ignore tm_wday */
236	pcf_tm.time[PCF50633_TI_WKDAY] = 7;
237
238	alarm_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_ALARM);
239
240	/* disable alarm interrupt */
241	if (!alarm_masked)
242	pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);
243
244	/* Returns 0 on success */
245	ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSCA,
246	PCF50633_TI_EXTENT, &pcf_tm.time[0]);
247
248	if (!alarm_masked)
249	pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
250
251	return ret;
252	}
253
254	static struct rtc_class_ops pcf50633_rtc_ops = {
255	.read_time = pcf50633_rtc_read_time,
256	.set_time = pcf50633_rtc_set_time,
257	.read_alarm = pcf50633_rtc_read_alarm,
258	.set_alarm = pcf50633_rtc_set_alarm,
259	.alarm_irq_enable = pcf50633_rtc_alarm_irq_enable,
260	.update_irq_enable = pcf50633_rtc_update_irq_enable,
261	};
262
263	static void pcf50633_rtc_irq(int irq, void *data)
264	{
265	struct pcf50633_rtc *rtc = data;
266
267	switch (irq) {
268	case PCF50633_IRQ_ALARM:
269	rtc_update_irq(rtc->rtc_dev, 1, RTC_AF \| RTC_IRQF);
270	break;
271	case PCF50633_IRQ_SECOND:
272	rtc_update_irq(rtc->rtc_dev, 1, RTC_UF \| RTC_IRQF);
273	break;
274	}
275	}
276
277	static int __devinit pcf50633_rtc_probe(struct platform_device *pdev)
278	{
279	struct pcf50633_subdev_pdata *pdata;
280	struct pcf50633_rtc *rtc;
281
282
283	rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
284	if (!rtc)
285	return -ENOMEM;
286
287	pdata = pdev->dev.platform_data;
288	rtc->pcf = pdata->pcf;
289	platform_set_drvdata(pdev, rtc);
290	rtc->rtc_dev = rtc_device_register("pcf50633-rtc", &pdev->dev,
291	&pcf50633_rtc_ops, THIS_MODULE);
292
293	if (IS_ERR(rtc->rtc_dev)) {
294	kfree(rtc);
295	return PTR_ERR(rtc->rtc_dev);
296	}
297
298	pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_ALARM,
299	pcf50633_rtc_irq, rtc);
300	pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_SECOND,
301	pcf50633_rtc_irq, rtc);
302
303	return 0;
304	}
305
306	static int __devexit pcf50633_rtc_remove(struct platform_device *pdev)
307	{
308	struct pcf50633_rtc *rtc;
309
310	rtc = platform_get_drvdata(pdev);
311
312	pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_ALARM);
313	pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_SECOND);
314
315	rtc_device_unregister(rtc->rtc_dev);
316	kfree(rtc);
317
318	return 0;
319	}
320
321	static struct platform_driver pcf50633_rtc_driver = {
322	.driver = {
323	.name = "pcf50633-rtc",
324	},
325	.probe = pcf50633_rtc_probe,
326	.remove = __devexit_p(pcf50633_rtc_remove),
327	};
328
329	static int __init pcf50633_rtc_init(void)
330	{
331	return platform_driver_register(&pcf50633_rtc_driver);
332	}
333	module_init(pcf50633_rtc_init);
334
335	static void __exit pcf50633_rtc_exit(void)
336	{
337	platform_driver_unregister(&pcf50633_rtc_driver);
338	}
339	module_exit(pcf50633_rtc_exit);
340
341	MODULE_DESCRIPTION("PCF50633 RTC driver");
342	MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
343	MODULE_LICENSE("GPL");
344