[GitHub/mt8127/android_kernel_alcatel_ttab.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/slab.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;
	int alarm_pending;

	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]) - 1;
	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 + 1);
	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;
	alrm->pending = rtc->alarm_pending;

	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 (!alrm->enabled)
		rtc->alarm_pending = 0;

	if (!alarm_masked || alrm->enabled)
		pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
	rtc->alarm_enabled = alrm->enabled;

	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);
		rtc->alarm_pending = 1;
		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_rtc *rtc;

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

	rtc->pcf = dev_to_pcf50633(pdev->dev.parent);
	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)) {
		int ret =  PTR_ERR(rtc->rtc_dev);
		kfree(rtc);
		return ret;
	}

	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>
5a0e3ad6	21	#include <linux/slab.h>
eae854b2 BR	22	#include <linux/platform_device.h>
	23	#include <linux/rtc.h>
	24	#include <linux/bcd.h>
	25	#include <linux/err.h>
	26
	27	#include <linux/mfd/pcf50633/core.h>
	28
	29	#define PCF50633_REG_RTCSC 0x59 /* Second */
	30	#define PCF50633_REG_RTCMN 0x5a /* Minute */
	31	#define PCF50633_REG_RTCHR 0x5b /* Hour */
	32	#define PCF50633_REG_RTCWD 0x5c /* Weekday */
	33	#define PCF50633_REG_RTCDT 0x5d /* Day */
	34	#define PCF50633_REG_RTCMT 0x5e /* Month */
	35	#define PCF50633_REG_RTCYR 0x5f /* Year */
	36	#define PCF50633_REG_RTCSCA 0x60 /* Alarm Second */
	37	#define PCF50633_REG_RTCMNA 0x61 /* Alarm Minute */
	38	#define PCF50633_REG_RTCHRA 0x62 /* Alarm Hour */
	39	#define PCF50633_REG_RTCWDA 0x63 /* Alarm Weekday */
	40	#define PCF50633_REG_RTCDTA 0x64 /* Alarm Day */
	41	#define PCF50633_REG_RTCMTA 0x65 /* Alarm Month */
	42	#define PCF50633_REG_RTCYRA 0x66 /* Alarm Year */
	43
	44	enum pcf50633_time_indexes {
	45	PCF50633_TI_SEC,
	46	PCF50633_TI_MIN,
	47	PCF50633_TI_HOUR,
	48	PCF50633_TI_WKDAY,
	49	PCF50633_TI_DAY,
	50	PCF50633_TI_MONTH,
	51	PCF50633_TI_YEAR,
	52	PCF50633_TI_EXTENT /* always last */
	53	};
	54
	55	struct pcf50633_time {
	56	u_int8_t time[PCF50633_TI_EXTENT];
	57	};
	58
	59	struct pcf50633_rtc {
	60	int alarm_enabled;
	61	int second_enabled;
a766ae3e	62	int alarm_pending;
eae854b2 BR	63
	64	struct pcf50633 *pcf;
	65	struct rtc_device *rtc_dev;
	66	};
	67
	68	static void pcf2rtc_time(struct rtc_time rtc, struct pcf50633_time pcf)
	69	{
	70	rtc->tm_sec = bcd2bin(pcf->time[PCF50633_TI_SEC]);
	71	rtc->tm_min = bcd2bin(pcf->time[PCF50633_TI_MIN]);
	72	rtc->tm_hour = bcd2bin(pcf->time[PCF50633_TI_HOUR]);
	73	rtc->tm_wday = bcd2bin(pcf->time[PCF50633_TI_WKDAY]);
	74	rtc->tm_mday = bcd2bin(pcf->time[PCF50633_TI_DAY]);
265f2a05	75	rtc->tm_mon = bcd2bin(pcf->time[PCF50633_TI_MONTH]) - 1;
eae854b2 BR	76	rtc->tm_year = bcd2bin(pcf->time[PCF50633_TI_YEAR]) + 100;
	77	}
	78
	79	static void rtc2pcf_time(struct pcf50633_time pcf, struct rtc_time rtc)
	80	{
	81	pcf->time[PCF50633_TI_SEC] = bin2bcd(rtc->tm_sec);
	82	pcf->time[PCF50633_TI_MIN] = bin2bcd(rtc->tm_min);
	83	pcf->time[PCF50633_TI_HOUR] = bin2bcd(rtc->tm_hour);
	84	pcf->time[PCF50633_TI_WKDAY] = bin2bcd(rtc->tm_wday);
	85	pcf->time[PCF50633_TI_DAY] = bin2bcd(rtc->tm_mday);
265f2a05	86	pcf->time[PCF50633_TI_MONTH] = bin2bcd(rtc->tm_mon + 1);
eae854b2 BR	87	pcf->time[PCF50633_TI_YEAR] = bin2bcd(rtc->tm_year % 100);
	88	}
	89
	90	static int
	91	pcf50633_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
	92	{
	93	struct pcf50633_rtc *rtc = dev_get_drvdata(dev);
	94	int err;
	95
	96	if (enabled)
	97	err = pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
	98	else
	99	err = pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);
	100
	101	if (err < 0)
	102	return err;
	103
	104	rtc->alarm_enabled = enabled;
	105
	106	return 0;
	107	}
	108
	109	static int
	110	pcf50633_rtc_update_irq_enable(struct device *dev, unsigned int enabled)
	111	{
	112	struct pcf50633_rtc *rtc = dev_get_drvdata(dev);
	113	int err;
	114
	115	if (enabled)
	116	err = pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_SECOND);
	117	else
	118	err = pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_SECOND);
	119
	120	if (err < 0)
	121	return err;
	122
	123	rtc->second_enabled = enabled;
	124
	125	return 0;
	126	}
	127
	128	static int pcf50633_rtc_read_time(struct device dev, struct rtc_time tm)
	129	{
	130	struct pcf50633_rtc *rtc;
	131	struct pcf50633_time pcf_tm;
	132	int ret;
	133
	134	rtc = dev_get_drvdata(dev);
	135
	136	ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSC,
	137	PCF50633_TI_EXTENT,
	138	&pcf_tm.time[0]);
	139	if (ret != PCF50633_TI_EXTENT) {
	140	dev_err(dev, "Failed to read time\n");
	141	return -EIO;
	142	}
	143
	144	dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
	145	pcf_tm.time[PCF50633_TI_DAY],
	146	pcf_tm.time[PCF50633_TI_MONTH],
	147	pcf_tm.time[PCF50633_TI_YEAR],
	148	pcf_tm.time[PCF50633_TI_HOUR],
	149	pcf_tm.time[PCF50633_TI_MIN],
	150	pcf_tm.time[PCF50633_TI_SEC]);
151
152	pcf2rtc_time(tm, &pcf_tm);
153
154	dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
155	tm->tm_mday, tm->tm_mon, tm->tm_year,
156	tm->tm_hour, tm->tm_min, tm->tm_sec);
157
158	return rtc_valid_tm(tm);
159	}
160
161	static int pcf50633_rtc_set_time(struct device dev, struct rtc_time tm)
162	{
163	struct pcf50633_rtc *rtc;
164	struct pcf50633_time pcf_tm;
165	int second_masked, alarm_masked, ret = 0;
166
167	rtc = dev_get_drvdata(dev);
168
169	dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
170	tm->tm_mday, tm->tm_mon, tm->tm_year,
171	tm->tm_hour, tm->tm_min, tm->tm_sec);
172
173	rtc2pcf_time(&pcf_tm, tm);
174
175	dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
176	pcf_tm.time[PCF50633_TI_DAY],
177	pcf_tm.time[PCF50633_TI_MONTH],
178	pcf_tm.time[PCF50633_TI_YEAR],
179	pcf_tm.time[PCF50633_TI_HOUR],
180	pcf_tm.time[PCF50633_TI_MIN],
181	pcf_tm.time[PCF50633_TI_SEC]);
182
183
184	second_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_SECOND);
185	alarm_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_ALARM);
186
187	if (!second_masked)
188	pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_SECOND);
189	if (!alarm_masked)
190	pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);
191
192	/* Returns 0 on success */
193	ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSC,
194	PCF50633_TI_EXTENT,
195	&pcf_tm.time[0]);
196
197	if (!second_masked)
198	pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_SECOND);
199	if (!alarm_masked)
200	pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
201
202	return ret;
203	}
204
205	static int pcf50633_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
206	{
207	struct pcf50633_rtc *rtc;
208	struct pcf50633_time pcf_tm;
209	int ret = 0;
210
211	rtc = dev_get_drvdata(dev);
212
213	alrm->enabled = rtc->alarm_enabled;
a766ae3e	214	alrm->pending = rtc->alarm_pending;
eae854b2 BR	215
	216	ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSCA,
	217	PCF50633_TI_EXTENT, &pcf_tm.time[0]);
	218	if (ret != PCF50633_TI_EXTENT) {
	219	dev_err(dev, "Failed to read time\n");
	220	return -EIO;
	221	}
	222
	223	pcf2rtc_time(&alrm->time, &pcf_tm);
	224
	225	return rtc_valid_tm(&alrm->time);
	226	}
	227
	228	static int pcf50633_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
	229	{
	230	struct pcf50633_rtc *rtc;
	231	struct pcf50633_time pcf_tm;
	232	int alarm_masked, ret = 0;
	233
	234	rtc = dev_get_drvdata(dev);
	235
	236	rtc2pcf_time(&pcf_tm, &alrm->time);
	237
	238	/* do like mktime does and ignore tm_wday */
	239	pcf_tm.time[PCF50633_TI_WKDAY] = 7;
	240
	241	alarm_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_ALARM);
	242
	243	/* disable alarm interrupt */
	244	if (!alarm_masked)
	245	pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);
	246
	247	/* Returns 0 on success */
	248	ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSCA,
	249	PCF50633_TI_EXTENT, &pcf_tm.time[0]);
a766ae3e WA	250	if (!alrm->enabled)
a766ae3e WA	251	rtc->alarm_pending = 0;
eae854b2	252
05f45d7d	253	if (!alarm_masked \|\| alrm->enabled)
eae854b2	254	pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
05f45d7d	255	rtc->alarm_enabled = alrm->enabled;
eae854b2 BR	256
	257	return ret;
	258	}
	259
	260	static struct rtc_class_ops pcf50633_rtc_ops = {
	261	.read_time = pcf50633_rtc_read_time,
	262	.set_time = pcf50633_rtc_set_time,
	263	.read_alarm = pcf50633_rtc_read_alarm,
	264	.set_alarm = pcf50633_rtc_set_alarm,
	265	.alarm_irq_enable = pcf50633_rtc_alarm_irq_enable,
	266	.update_irq_enable = pcf50633_rtc_update_irq_enable,
	267	};
	268
	269	static void pcf50633_rtc_irq(int irq, void *data)
	270	{
	271	struct pcf50633_rtc *rtc = data;
	272
	273	switch (irq) {
	274	case PCF50633_IRQ_ALARM:
	275	rtc_update_irq(rtc->rtc_dev, 1, RTC_AF \| RTC_IRQF);
a766ae3e	276	rtc->alarm_pending = 1;
eae854b2 BR	277	break;
	278	case PCF50633_IRQ_SECOND:
	279	rtc_update_irq(rtc->rtc_dev, 1, RTC_UF \| RTC_IRQF);
	280	break;
	281	}
	282	}
	283
	284	static int __devinit pcf50633_rtc_probe(struct platform_device *pdev)
	285	{
eae854b2 BR	286	struct pcf50633_rtc *rtc;
eae854b2 BR	287
eae854b2 BR	288	rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
	289	if (!rtc)
	290	return -ENOMEM;
	291
68d641ef	292	rtc->pcf = dev_to_pcf50633(pdev->dev.parent);
eae854b2 BR	293	platform_set_drvdata(pdev, rtc);
	294	rtc->rtc_dev = rtc_device_register("pcf50633-rtc", &pdev->dev,
	295	&pcf50633_rtc_ops, THIS_MODULE);
	296
	297	if (IS_ERR(rtc->rtc_dev)) {
fa00e106	298	int ret = PTR_ERR(rtc->rtc_dev);
eae854b2	299	kfree(rtc);
fa00e106	300	return ret;
eae854b2 BR	301	}
	302
	303	pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_ALARM,
	304	pcf50633_rtc_irq, rtc);
	305	pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_SECOND,
	306	pcf50633_rtc_irq, rtc);
	307
	308	return 0;
	309	}
	310
	311	static int __devexit pcf50633_rtc_remove(struct platform_device *pdev)
	312	{
	313	struct pcf50633_rtc *rtc;
	314
	315	rtc = platform_get_drvdata(pdev);
	316
	317	pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_ALARM);
	318	pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_SECOND);
	319
	320	rtc_device_unregister(rtc->rtc_dev);
	321	kfree(rtc);
	322
	323	return 0;
	324	}
	325
	326	static struct platform_driver pcf50633_rtc_driver = {
	327	.driver = {
	328	.name = "pcf50633-rtc",
	329	},
	330	.probe = pcf50633_rtc_probe,
	331	.remove = __devexit_p(pcf50633_rtc_remove),
	332	};
	333
	334	static int __init pcf50633_rtc_init(void)
	335	{
	336	return platform_driver_register(&pcf50633_rtc_driver);
	337	}
	338	module_init(pcf50633_rtc_init);
	339
	340	static void __exit pcf50633_rtc_exit(void)
	341	{
	342	platform_driver_unregister(&pcf50633_rtc_driver);
	343	}
	344	module_exit(pcf50633_rtc_exit);
	345
	346	MODULE_DESCRIPTION("PCF50633 RTC driver");
	347	MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
	348	MODULE_LICENSE("GPL");
	349