[linux-block.git] / drivers / rtc / rtc-mc13xxx.c

/*
 * Real Time Clock driver for Freescale MC13XXX PMIC
 *
 * (C) 2009 Sascha Hauer, Pengutronix
 * (C) 2009 Uwe Kleine-Koenig, Pengutronix
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/mfd/mc13xxx.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/rtc.h>

#define DRIVER_NAME "mc13xxx-rtc"

#define MC13XXX_RTCTOD	20
#define MC13XXX_RTCTODA	21
#define MC13XXX_RTCDAY	22
#define MC13XXX_RTCDAYA	23

#define SEC_PER_DAY	(24 * 60 * 60)

struct mc13xxx_rtc {
	struct rtc_device *rtc;
	struct mc13xxx *mc13xxx;
	int valid;
};

static int mc13xxx_rtc_irq_enable_unlocked(struct device *dev,
		unsigned int enabled, int irq)
{
	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	int (*func)(struct mc13xxx *mc13xxx, int irq);

	if (!priv->valid)
		return -ENODATA;

	func = enabled ? mc13xxx_irq_unmask : mc13xxx_irq_mask;
	return func(priv->mc13xxx, irq);
}

static int mc13xxx_rtc_alarm_irq_enable(struct device *dev,
					unsigned int enabled)
{
	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	int ret;

	mc13xxx_lock(priv->mc13xxx);

	ret = mc13xxx_rtc_irq_enable_unlocked(dev, enabled, MC13XXX_IRQ_TODA);

	mc13xxx_unlock(priv->mc13xxx);

	return ret;
}

static int mc13xxx_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	unsigned int seconds, days1, days2;

	if (!priv->valid)
		return -ENODATA;

	do {
		int ret;

		ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days1);
		if (ret)
			return ret;

		ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds);
		if (ret)
			return ret;

		ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days2);
		if (ret)
			return ret;
	} while (days1 != days2);

	rtc_time64_to_tm((time64_t)days1 * SEC_PER_DAY + seconds, tm);

	return 0;
}

static int mc13xxx_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	unsigned int seconds, days;
	unsigned int alarmseconds;
	int ret;

	days = div_s64_rem(rtc_tm_to_time64(tm), SEC_PER_DAY, &seconds);

	mc13xxx_lock(priv->mc13xxx);

	/*
	 * temporarily invalidate alarm to prevent triggering it when the day is
	 * already updated while the time isn't yet.
	 */
	ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &alarmseconds);
	if (unlikely(ret))
		goto out;

	if (alarmseconds < SEC_PER_DAY) {
		ret = mc13xxx_reg_write(priv->mc13xxx,
				MC13XXX_RTCTODA, 0x1ffff);
		if (unlikely(ret))
			goto out;
	}

	/*
	 * write seconds=0 to prevent a day switch between writing days
	 * and seconds below
	 */
	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, 0);
	if (unlikely(ret))
		goto out;

	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAY, days);
	if (unlikely(ret))
		goto out;

	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, seconds);
	if (unlikely(ret))
		goto out;

	/* restore alarm */
	if (alarmseconds < SEC_PER_DAY) {
		ret = mc13xxx_reg_write(priv->mc13xxx,
				MC13XXX_RTCTODA, alarmseconds);
		if (unlikely(ret))
			goto out;
	}

	if (!priv->valid) {
		ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
		if (unlikely(ret))
			goto out;

		ret = mc13xxx_irq_unmask(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
	}

out:
	priv->valid = !ret;

	mc13xxx_unlock(priv->mc13xxx);

	return ret;
}

static int mc13xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	unsigned seconds, days;
	time64_t s1970;
	int enabled, pending;
	int ret;

	mc13xxx_lock(priv->mc13xxx);

	ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &seconds);
	if (unlikely(ret))
		goto out;
	if (seconds >= SEC_PER_DAY) {
		ret = -ENODATA;
		goto out;
	}

	ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days);
	if (unlikely(ret))
		goto out;

	ret = mc13xxx_irq_status(priv->mc13xxx, MC13XXX_IRQ_TODA,
			&enabled, &pending);

out:
	mc13xxx_unlock(priv->mc13xxx);

	if (ret)
		return ret;

	alarm->enabled = enabled;
	alarm->pending = pending;

	s1970 = (time64_t)days * SEC_PER_DAY + seconds;

	rtc_time64_to_tm(s1970, &alarm->time);
	dev_dbg(dev, "%s: %lld\n", __func__, (long long)s1970);

	return 0;
}

static int mc13xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	time64_t s1970;
	u32 seconds, days;
	int ret;

	mc13xxx_lock(priv->mc13xxx);

	/* disable alarm to prevent false triggering */
	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, 0x1ffff);
	if (unlikely(ret))
		goto out;

	ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_TODA);
	if (unlikely(ret))
		goto out;

	s1970 = rtc_tm_to_time64(&alarm->time);

	dev_dbg(dev, "%s: %s %lld\n", __func__, alarm->enabled ? "on" : "off",
			(long long)s1970);

	ret = mc13xxx_rtc_irq_enable_unlocked(dev, alarm->enabled,
			MC13XXX_IRQ_TODA);
	if (unlikely(ret))
		goto out;

	days = div_s64_rem(s1970, SEC_PER_DAY, &seconds);

	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAYA, days);
	if (unlikely(ret))
		goto out;

	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, seconds);

out:
	mc13xxx_unlock(priv->mc13xxx);

	return ret;
}

static irqreturn_t mc13xxx_rtc_alarm_handler(int irq, void *dev)
{
	struct mc13xxx_rtc *priv = dev;
	struct mc13xxx *mc13xxx = priv->mc13xxx;

	rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_AF);

	mc13xxx_irq_ack(mc13xxx, irq);

	return IRQ_HANDLED;
}

static const struct rtc_class_ops mc13xxx_rtc_ops = {
	.read_time = mc13xxx_rtc_read_time,
	.set_time = mc13xxx_rtc_set_time,
	.read_alarm = mc13xxx_rtc_read_alarm,
	.set_alarm = mc13xxx_rtc_set_alarm,
	.alarm_irq_enable = mc13xxx_rtc_alarm_irq_enable,
};

static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev)
{
	struct mc13xxx_rtc *priv = dev;
	struct mc13xxx *mc13xxx = priv->mc13xxx;

	priv->valid = 0;

	mc13xxx_irq_mask(mc13xxx, irq);

	return IRQ_HANDLED;
}

static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
{
	int ret;
	struct mc13xxx_rtc *priv;
	struct mc13xxx *mc13xxx;

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	mc13xxx = dev_get_drvdata(pdev->dev.parent);
	priv->mc13xxx = mc13xxx;
	priv->valid = 1;

	priv->rtc = devm_rtc_allocate_device(&pdev->dev);
	if (IS_ERR(priv->rtc))
		return PTR_ERR(priv->rtc);
	platform_set_drvdata(pdev, priv);

	priv->rtc->ops = &mc13xxx_rtc_ops;
	/* 15bit days + hours, minutes, seconds */
	priv->rtc->range_max = (timeu64_t)(1 << 15) * SEC_PER_DAY - 1;

	mc13xxx_lock(mc13xxx);

	mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_RTCRST);

	ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_RTCRST,
			mc13xxx_rtc_reset_handler, DRIVER_NAME, priv);
	if (ret)
		goto err_irq_request;

	ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_TODA,
			mc13xxx_rtc_alarm_handler, DRIVER_NAME, priv);
	if (ret)
		goto err_irq_request;

	mc13xxx_unlock(mc13xxx);

	ret = rtc_register_device(priv->rtc);
	if (ret)
		goto err_irq_request;

	return 0;

err_irq_request:
	mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_TODA, priv);
	mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_RTCRST, priv);

	mc13xxx_unlock(mc13xxx);

	return ret;
}

static int mc13xxx_rtc_remove(struct platform_device *pdev)
{
	struct mc13xxx_rtc *priv = platform_get_drvdata(pdev);

	mc13xxx_lock(priv->mc13xxx);

	mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TODA, priv);
	mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_RTCRST, priv);

	mc13xxx_unlock(priv->mc13xxx);

	return 0;
}

static const struct platform_device_id mc13xxx_rtc_idtable[] = {
	{
		.name = "mc13783-rtc",
	}, {
		.name = "mc13892-rtc",
	}, {
		.name = "mc34708-rtc",
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, mc13xxx_rtc_idtable);

static struct platform_driver mc13xxx_rtc_driver = {
	.id_table = mc13xxx_rtc_idtable,
	.remove = mc13xxx_rtc_remove,
	.driver = {
		.name = DRIVER_NAME,
	},
};

module_platform_driver_probe(mc13xxx_rtc_driver, &mc13xxx_rtc_probe);

MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
1c97872b UKK	1	/*
	2	* Real Time Clock driver for Freescale MC13XXX PMIC
	3	*
	4	* (C) 2009 Sascha Hauer, Pengutronix
	5	* (C) 2009 Uwe Kleine-Koenig, Pengutronix
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/mfd/mc13xxx.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
ac316725	16	#include <linux/mod_devicetable.h>
1c97872b UKK	17	#include <linux/slab.h>
	18	#include <linux/rtc.h>
	19
	20	#define DRIVER_NAME "mc13xxx-rtc"
	21
	22	#define MC13XXX_RTCTOD 20
	23	#define MC13XXX_RTCTODA 21
	24	#define MC13XXX_RTCDAY 22
	25	#define MC13XXX_RTCDAYA 23
	26
6a2b3422 AS	27	#define SEC_PER_DAY (24 * 60 * 60)
6a2b3422 AS	28
1c97872b UKK	29	struct mc13xxx_rtc {
	30	struct rtc_device *rtc;
	31	struct mc13xxx *mc13xxx;
	32	int valid;
	33	};
	34
	35	static int mc13xxx_rtc_irq_enable_unlocked(struct device *dev,
	36	unsigned int enabled, int irq)
	37	{
	38	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	39	int (func)(struct mc13xxx mc13xxx, int irq);
	40
	41	if (!priv->valid)
	42	return -ENODATA;
	43
	44	func = enabled ? mc13xxx_irq_unmask : mc13xxx_irq_mask;
	45	return func(priv->mc13xxx, irq);
	46	}
	47
2fb004a9 AS	48	static int mc13xxx_rtc_alarm_irq_enable(struct device *dev,
2fb004a9 AS	49	unsigned int enabled)
1c97872b UKK	50	{
	51	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	52	int ret;
	53
	54	mc13xxx_lock(priv->mc13xxx);
	55
2fb004a9	56	ret = mc13xxx_rtc_irq_enable_unlocked(dev, enabled, MC13XXX_IRQ_TODA);
1c97872b UKK	57
	58	mc13xxx_unlock(priv->mc13xxx);
	59
	60	return ret;
	61	}
	62
	63	static int mc13xxx_rtc_read_time(struct device dev, struct rtc_time tm)
	64	{
	65	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	66	unsigned int seconds, days1, days2;
1c97872b	67
12de3621 AS	68	if (!priv->valid)
12de3621 AS	69	return -ENODATA;
1c97872b	70
6a2b3422 AS	71	do {
6a2b3422 AS	72	int ret;
1c97872b	73
6a2b3422 AS	74	ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days1);
	75	if (ret)
	76	return ret;
1c97872b	77
6a2b3422 AS	78	ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds);
	79	if (ret)
	80	return ret;
1c97872b	81
6a2b3422 AS	82	ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days2);
	83	if (ret)
	84	return ret;
	85	} while (days1 != days2);
1c97872b	86
0307b0d7	87	rtc_time64_to_tm((time64_t)days1 * SEC_PER_DAY + seconds, tm);
1c97872b	88
146d21bd	89	return 0;
1c97872b UKK	90	}
1c97872b UKK	91
eee86dea	92	static int mc13xxx_rtc_set_time(struct device dev, struct rtc_time tm)
1c97872b UKK	93	{
	94	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	95	unsigned int seconds, days;
	96	unsigned int alarmseconds;
	97	int ret;
	98
eee86dea	99	days = div_s64_rem(rtc_tm_to_time64(tm), SEC_PER_DAY, &seconds);
1c97872b UKK	100
	101	mc13xxx_lock(priv->mc13xxx);
	102
	103	/*
	104	* temporarily invalidate alarm to prevent triggering it when the day is
	105	* already updated while the time isn't yet.
	106	*/
	107	ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &alarmseconds);
	108	if (unlikely(ret))
	109	goto out;
	110
6a2b3422	111	if (alarmseconds < SEC_PER_DAY) {
1c97872b UKK	112	ret = mc13xxx_reg_write(priv->mc13xxx,
	113	MC13XXX_RTCTODA, 0x1ffff);
	114	if (unlikely(ret))
	115	goto out;
	116	}
	117
	118	/*
	119	* write seconds=0 to prevent a day switch between writing days
	120	* and seconds below
	121	*/
	122	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, 0);
	123	if (unlikely(ret))
	124	goto out;
	125
	126	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAY, days);
	127	if (unlikely(ret))
	128	goto out;
	129
	130	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, seconds);
	131	if (unlikely(ret))
	132	goto out;
	133
	134	/* restore alarm */
6a2b3422	135	if (alarmseconds < SEC_PER_DAY) {
1c97872b UKK	136	ret = mc13xxx_reg_write(priv->mc13xxx,
	137	MC13XXX_RTCTODA, alarmseconds);
	138	if (unlikely(ret))
	139	goto out;
	140	}
	141
12de3621 AS	142	if (!priv->valid) {
	143	ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
	144	if (unlikely(ret))
	145	goto out;
	146
	147	ret = mc13xxx_irq_unmask(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
	148	}
1c97872b	149
1c97872b UKK	150	out:
	151	priv->valid = !ret;
	152
	153	mc13xxx_unlock(priv->mc13xxx);
	154
	155	return ret;
	156	}
	157
	158	static int mc13xxx_rtc_read_alarm(struct device dev, struct rtc_wkalrm alarm)
	159	{
	160	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
	161	unsigned seconds, days;
0307b0d7	162	time64_t s1970;
1c97872b UKK	163	int enabled, pending;
	164	int ret;
	165
	166	mc13xxx_lock(priv->mc13xxx);
	167
	168	ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &seconds);
	169	if (unlikely(ret))
	170	goto out;
6a2b3422	171	if (seconds >= SEC_PER_DAY) {
1c97872b UKK	172	ret = -ENODATA;
	173	goto out;
	174	}
	175
	176	ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days);
	177	if (unlikely(ret))
	178	goto out;
	179
	180	ret = mc13xxx_irq_status(priv->mc13xxx, MC13XXX_IRQ_TODA,
	181	&enabled, &pending);
	182
	183	out:
	184	mc13xxx_unlock(priv->mc13xxx);
	185
	186	if (ret)
	187	return ret;
	188
	189	alarm->enabled = enabled;
	190	alarm->pending = pending;
	191
0307b0d7	192	s1970 = (time64_t)days * SEC_PER_DAY + seconds;
1c97872b	193
0307b0d7 XP	194	rtc_time64_to_tm(s1970, &alarm->time);
0307b0d7 XP	195	dev_dbg(dev, "%s: %lld\n", __func__, (long long)s1970);
1c97872b UKK	196
	197	return 0;
	198	}
	199
	200	static int mc13xxx_rtc_set_alarm(struct device dev, struct rtc_wkalrm alarm)
	201	{
	202	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
0307b0d7 XP	203	time64_t s1970;
0307b0d7 XP	204	u32 seconds, days;
1c97872b UKK	205	int ret;
	206
	207	mc13xxx_lock(priv->mc13xxx);
	208
	209	/* disable alarm to prevent false triggering */
	210	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, 0x1ffff);
	211	if (unlikely(ret))
	212	goto out;
	213
	214	ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_TODA);
	215	if (unlikely(ret))
	216	goto out;
	217
0307b0d7	218	s1970 = rtc_tm_to_time64(&alarm->time);
1c97872b	219
99c14e4d	220	dev_dbg(dev, "%s: %s %lld\n", __func__, alarm->enabled ? "on" : "off",
0307b0d7	221	(long long)s1970);
1c97872b UKK	222
	223	ret = mc13xxx_rtc_irq_enable_unlocked(dev, alarm->enabled,
	224	MC13XXX_IRQ_TODA);
	225	if (unlikely(ret))
	226	goto out;
	227
0307b0d7	228	days = div_s64_rem(s1970, SEC_PER_DAY, &seconds);
1c97872b UKK	229
	230	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAYA, days);
	231	if (unlikely(ret))
	232	goto out;
	233
	234	ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, seconds);
	235
	236	out:
	237	mc13xxx_unlock(priv->mc13xxx);
	238
	239	return ret;
	240	}
	241
	242	static irqreturn_t mc13xxx_rtc_alarm_handler(int irq, void *dev)
	243	{
	244	struct mc13xxx_rtc *priv = dev;
	245	struct mc13xxx *mc13xxx = priv->mc13xxx;
	246
1c97872b UKK	247	rtc_update_irq(priv->rtc, 1, RTC_IRQF \| RTC_AF);
	248
	249	mc13xxx_irq_ack(mc13xxx, irq);
	250
	251	return IRQ_HANDLED;
	252	}
	253
1c97872b UKK	254	static const struct rtc_class_ops mc13xxx_rtc_ops = {
1c97872b UKK	255	.read_time = mc13xxx_rtc_read_time,
eee86dea	256	.set_time = mc13xxx_rtc_set_time,
1c97872b UKK	257	.read_alarm = mc13xxx_rtc_read_alarm,
	258	.set_alarm = mc13xxx_rtc_set_alarm,
	259	.alarm_irq_enable = mc13xxx_rtc_alarm_irq_enable,
1c97872b UKK	260	};
	261
	262	static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev)
	263	{
	264	struct mc13xxx_rtc *priv = dev;
	265	struct mc13xxx *mc13xxx = priv->mc13xxx;
	266
1c97872b UKK	267	priv->valid = 0;
	268
	269	mc13xxx_irq_mask(mc13xxx, irq);
	270
	271	return IRQ_HANDLED;
	272	}
	273
db5cf8d1	274	static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
1c97872b UKK	275	{
	276	int ret;
	277	struct mc13xxx_rtc *priv;
	278	struct mc13xxx *mc13xxx;
1c97872b	279
a379fd24	280	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1c97872b UKK	281	if (!priv)
	282	return -ENOMEM;
	283
	284	mc13xxx = dev_get_drvdata(pdev->dev.parent);
	285	priv->mc13xxx = mc13xxx;
12de3621	286	priv->valid = 1;
1c97872b	287
e4ae7023 AB	288	priv->rtc = devm_rtc_allocate_device(&pdev->dev);
	289	if (IS_ERR(priv->rtc))
	290	return PTR_ERR(priv->rtc);
1c97872b UKK	291	platform_set_drvdata(pdev, priv);
1c97872b UKK	292
e4ae7023 AB	293	priv->rtc->ops = &mc13xxx_rtc_ops;
	294	/* 15bit days + hours, minutes, seconds */
	295	priv->rtc->range_max = (timeu64_t)(1 << 15) * SEC_PER_DAY - 1;
	296
1c97872b UKK	297	mc13xxx_lock(mc13xxx);
1c97872b UKK	298
12de3621 AS	299	mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_RTCRST);
12de3621 AS	300
1c97872b UKK	301	ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_RTCRST,
	302	mc13xxx_rtc_reset_handler, DRIVER_NAME, priv);
	303	if (ret)
5ab9a52a	304	goto err_irq_request;
1c97872b	305
1c97872b UKK	306	ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_TODA,
1c97872b UKK	307	mc13xxx_rtc_alarm_handler, DRIVER_NAME, priv);
5ab9a52a AS	308	if (ret)
5ab9a52a AS	309	goto err_irq_request;
1c97872b	310
5ab9a52a AS	311	mc13xxx_unlock(mc13xxx);
5ab9a52a AS	312
e4ae7023 AB	313	ret = rtc_register_device(priv->rtc);
	314	if (ret)
	315	goto err_irq_request;
1c97872b	316
5ab9a52a AS	317	return 0;
	318
	319	err_irq_request:
	320	mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_TODA, priv);
589e5014	321	mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_RTCRST, priv);
1c97872b	322
589e5014	323	mc13xxx_unlock(mc13xxx);
1c97872b	324
1c97872b UKK	325	return ret;
	326	}
	327
77bf2ea8	328	static int mc13xxx_rtc_remove(struct platform_device *pdev)
1c97872b UKK	329	{
	330	struct mc13xxx_rtc *priv = platform_get_drvdata(pdev);
	331
	332	mc13xxx_lock(priv->mc13xxx);
	333
1c97872b	334	mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TODA, priv);
1c97872b UKK	335	mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_RTCRST, priv);
	336
	337	mc13xxx_unlock(priv->mc13xxx);
	338
1c97872b UKK	339	return 0;
	340	}
	341
a46481d7	342	static const struct platform_device_id mc13xxx_rtc_idtable[] = {
1c97872b UKK	343	{
	344	.name = "mc13783-rtc",
	345	}, {
	346	.name = "mc13892-rtc",
19a1ac50 UKK	347	}, {
19a1ac50 UKK	348	.name = "mc34708-rtc",
1c97872b	349	},
0f636fc1	350	{ /* sentinel */ }
1c97872b	351	};
0f636fc1	352	MODULE_DEVICE_TABLE(platform, mc13xxx_rtc_idtable);
1c97872b UKK	353
	354	static struct platform_driver mc13xxx_rtc_driver = {
	355	.id_table = mc13xxx_rtc_idtable,
77bf2ea8	356	.remove = mc13xxx_rtc_remove,
1c97872b UKK	357	.driver = {
1c97872b UKK	358	.name = DRIVER_NAME,
1c97872b UKK	359	},
	360	};
	361
09fb7ad1	362	module_platform_driver_probe(mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
1c97872b UKK	363
	364	MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
	365	MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
	366	MODULE_LICENSE("GPL v2");