[mirror_ubuntu-bionic-kernel.git] / drivers / rtc / rtc-stmp3xxx.c

/*
 * Freescale STMP37XX/STMP378X Real Time Clock driver
 *
 * Copyright (c) 2007 Sigmatel, Inc.
 * Peter Hartley, <peter.hartley@sigmatel.com>
 *
 * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
 * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
 * Copyright 2011 Wolfram Sang, Pengutronix e.K.
 */

/*
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/rtc.h>
#include <linux/slab.h>

#include <mach/common.h>

#define STMP3XXX_RTC_CTRL			0x0
#define STMP3XXX_RTC_CTRL_SET			0x4
#define STMP3XXX_RTC_CTRL_CLR			0x8
#define STMP3XXX_RTC_CTRL_ALARM_IRQ_EN		0x00000001
#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN	0x00000002
#define STMP3XXX_RTC_CTRL_ALARM_IRQ		0x00000004

#define STMP3XXX_RTC_STAT			0x10
#define STMP3XXX_RTC_STAT_STALE_SHIFT		16
#define STMP3XXX_RTC_STAT_RTC_PRESENT		0x80000000

#define STMP3XXX_RTC_SECONDS			0x30

#define STMP3XXX_RTC_ALARM			0x40

#define STMP3XXX_RTC_PERSISTENT0		0x60
#define STMP3XXX_RTC_PERSISTENT0_SET		0x64
#define STMP3XXX_RTC_PERSISTENT0_CLR		0x68
#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN	0x00000002
#define STMP3XXX_RTC_PERSISTENT0_ALARM_EN	0x00000004
#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE	0x00000080

struct stmp3xxx_rtc_data {
	struct rtc_device *rtc;
	void __iomem *io;
	int irq_alarm;
};

static void stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data)
{
	/*
	 * The datasheet doesn't say which way round the
	 * NEW_REGS/STALE_REGS bitfields go. In fact it's 0x1=P0,
	 * 0x2=P1, .., 0x20=P5, 0x40=ALARM, 0x80=SECONDS
	 */
	while (readl(rtc_data->io + STMP3XXX_RTC_STAT) &
			(0x80 << STMP3XXX_RTC_STAT_STALE_SHIFT))
		cpu_relax();
}

/* Time read/write */
static int stmp3xxx_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
{
	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);

	stmp3xxx_wait_time(rtc_data);
	rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_SECONDS), rtc_tm);
	return 0;
}

static int stmp3xxx_rtc_set_mmss(struct device *dev, unsigned long t)
{
	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);

	writel(t, rtc_data->io + STMP3XXX_RTC_SECONDS);
	stmp3xxx_wait_time(rtc_data);
	return 0;
}

/* interrupt(s) handler */
static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id)
{
	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev_id);
	u32 status = readl(rtc_data->io + STMP3XXX_RTC_CTRL);

	if (status & STMP3XXX_RTC_CTRL_ALARM_IRQ) {
		writel(STMP3XXX_RTC_CTRL_ALARM_IRQ,
				rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
		rtc_update_irq(rtc_data->rtc, 1, RTC_AF | RTC_IRQF);
		return IRQ_HANDLED;
	}

	return IRQ_NONE;
}

static int stmp3xxx_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);

	if (enabled) {
		writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
				STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN,
				rtc_data->io + STMP3XXX_RTC_PERSISTENT0_SET);
		writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
				rtc_data->io + STMP3XXX_RTC_CTRL_SET);
	} else {
		writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
				STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN,
				rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
		writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
				rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
	}
	return 0;
}

static int stmp3xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);

	rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_ALARM), &alm->time);
	return 0;
}

static int stmp3xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
	unsigned long t;
	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);

	rtc_tm_to_time(&alm->time, &t);
	writel(t, rtc_data->io + STMP3XXX_RTC_ALARM);

	stmp3xxx_alarm_irq_enable(dev, alm->enabled);

	return 0;
}

static struct rtc_class_ops stmp3xxx_rtc_ops = {
	.alarm_irq_enable =
			  stmp3xxx_alarm_irq_enable,
	.read_time	= stmp3xxx_rtc_gettime,
	.set_mmss	= stmp3xxx_rtc_set_mmss,
	.read_alarm	= stmp3xxx_rtc_read_alarm,
	.set_alarm	= stmp3xxx_rtc_set_alarm,
};

static int stmp3xxx_rtc_remove(struct platform_device *pdev)
{
	struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(pdev);

	if (!rtc_data)
		return 0;

	writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
			rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
	free_irq(rtc_data->irq_alarm, &pdev->dev);
	rtc_device_unregister(rtc_data->rtc);
	platform_set_drvdata(pdev, NULL);
	iounmap(rtc_data->io);
	kfree(rtc_data);

	return 0;
}

static int stmp3xxx_rtc_probe(struct platform_device *pdev)
{
	struct stmp3xxx_rtc_data *rtc_data;
	struct resource *r;
	int err;

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

	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!r) {
		dev_err(&pdev->dev, "failed to get resource\n");
		err = -ENXIO;
		goto out_free;
	}

	rtc_data->io = ioremap(r->start, resource_size(r));
	if (!rtc_data->io) {
		dev_err(&pdev->dev, "ioremap failed\n");
		err = -EIO;
		goto out_free;
	}

	rtc_data->irq_alarm = platform_get_irq(pdev, 0);

	if (!(readl(STMP3XXX_RTC_STAT + rtc_data->io) &
			STMP3XXX_RTC_STAT_RTC_PRESENT)) {
		dev_err(&pdev->dev, "no device onboard\n");
		err = -ENODEV;
		goto out_remap;
	}

	platform_set_drvdata(pdev, rtc_data);

	mxs_reset_block(rtc_data->io);
	writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
			STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
			STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
			rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);

	writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN |
			STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
			rtc_data->io + STMP3XXX_RTC_CTRL_CLR);

	rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev,
				&stmp3xxx_rtc_ops, THIS_MODULE);
	if (IS_ERR(rtc_data->rtc)) {
		err = PTR_ERR(rtc_data->rtc);
		goto out_remap;
	}

	err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt, 0,
			"RTC alarm", &pdev->dev);
	if (err) {
		dev_err(&pdev->dev, "Cannot claim IRQ%d\n",
			rtc_data->irq_alarm);
		goto out_irq_alarm;
	}

	return 0;

out_irq_alarm:
	rtc_device_unregister(rtc_data->rtc);
out_remap:
	platform_set_drvdata(pdev, NULL);
	iounmap(rtc_data->io);
out_free:
	kfree(rtc_data);
	return err;
}

#ifdef CONFIG_PM
static int stmp3xxx_rtc_suspend(struct platform_device *dev, pm_message_t state)
{
	return 0;
}

static int stmp3xxx_rtc_resume(struct platform_device *dev)
{
	struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(dev);

	mxs_reset_block(rtc_data->io);
	writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
			STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN |
			STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
			rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
	return 0;
}
#else
#define stmp3xxx_rtc_suspend	NULL
#define stmp3xxx_rtc_resume	NULL
#endif

static struct platform_driver stmp3xxx_rtcdrv = {
	.probe		= stmp3xxx_rtc_probe,
	.remove		= stmp3xxx_rtc_remove,
	.suspend	= stmp3xxx_rtc_suspend,
	.resume		= stmp3xxx_rtc_resume,
	.driver		= {
		.name	= "stmp3xxx-rtc",
		.owner	= THIS_MODULE,
	},
};

static int __init stmp3xxx_rtc_init(void)
{
	return platform_driver_register(&stmp3xxx_rtcdrv);
}

static void __exit stmp3xxx_rtc_exit(void)
{
	platform_driver_unregister(&stmp3xxx_rtcdrv);
}

module_init(stmp3xxx_rtc_init);
module_exit(stmp3xxx_rtc_exit);

MODULE_DESCRIPTION("STMP3xxx RTC Driver");
MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com> and "
		"Wolfram Sang <w.sang@pengutronix.de>");
MODULE_LICENSE("GPL");
Commit	Line	Data
df17f631	1	/*
	2	* Freescale STMP37XX/STMP378X Real Time Clock driver
	3	*
	4	* Copyright (c) 2007 Sigmatel, Inc.
	5	* Peter Hartley, <peter.hartley@sigmatel.com>
	6	*
	7	* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
	8	* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
7e794cb7	9	* Copyright 2011 Wolfram Sang, Pengutronix e.K.
df17f631	10	*/
	11
	12	/*
	13	* The code contained herein is licensed under the GNU General Public
	14	* License. You may obtain a copy of the GNU General Public License
	15	* Version 2 or later at the following locations:
	16	*
	17	* http://www.opensource.org/licenses/gpl-license.html
	18	* http://www.gnu.org/copyleft/gpl.html
	19	*/
	20	#include <linux/kernel.h>
	21	#include <linux/module.h>
b5167159	22	#include <linux/io.h>
df17f631	23	#include <linux/init.h>
	24	#include <linux/platform_device.h>
	25	#include <linux/interrupt.h>
	26	#include <linux/rtc.h>
5a0e3ad6	27	#include <linux/slab.h>
df17f631	28
46b21218	29	#include <mach/common.h>
47eac337 WS	30
47eac337 WS	31	#define STMP3XXX_RTC_CTRL 0x0
b5167159 WS	32	#define STMP3XXX_RTC_CTRL_SET 0x4
b5167159 WS	33	#define STMP3XXX_RTC_CTRL_CLR 0x8
47eac337 WS	34	#define STMP3XXX_RTC_CTRL_ALARM_IRQ_EN 0x00000001
	35	#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN 0x00000002
	36	#define STMP3XXX_RTC_CTRL_ALARM_IRQ 0x00000004
47eac337 WS	37
	38	#define STMP3XXX_RTC_STAT 0x10
	39	#define STMP3XXX_RTC_STAT_STALE_SHIFT 16
	40	#define STMP3XXX_RTC_STAT_RTC_PRESENT 0x80000000
	41
	42	#define STMP3XXX_RTC_SECONDS 0x30
	43
	44	#define STMP3XXX_RTC_ALARM 0x40
	45
	46	#define STMP3XXX_RTC_PERSISTENT0 0x60
b5167159 WS	47	#define STMP3XXX_RTC_PERSISTENT0_SET 0x64
b5167159 WS	48	#define STMP3XXX_RTC_PERSISTENT0_CLR 0x68
47eac337 WS	49	#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN 0x00000002
	50	#define STMP3XXX_RTC_PERSISTENT0_ALARM_EN 0x00000004
	51	#define STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE 0x00000080
df17f631	52
	53	struct stmp3xxx_rtc_data {
	54	struct rtc_device *rtc;
df17f631	55	void __iomem *io;
7e794cb7	56	int irq_alarm;
df17f631	57	};
	58
	59	static void stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data)
	60	{
	61	/*
	62	* The datasheet doesn't say which way round the
	63	* NEW_REGS/STALE_REGS bitfields go. In fact it's 0x1=P0,
	64	* 0x2=P1, .., 0x20=P5, 0x40=ALARM, 0x80=SECONDS
	65	*/
b5167159	66	while (readl(rtc_data->io + STMP3XXX_RTC_STAT) &
47eac337	67	(0x80 << STMP3XXX_RTC_STAT_STALE_SHIFT))
df17f631	68	cpu_relax();
	69	}
	70
	71	/* Time read/write */
	72	static int stmp3xxx_rtc_gettime(struct device dev, struct rtc_time rtc_tm)
	73	{
	74	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
	75
	76	stmp3xxx_wait_time(rtc_data);
b5167159	77	rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_SECONDS), rtc_tm);
df17f631	78	return 0;
	79	}
	80
	81	static int stmp3xxx_rtc_set_mmss(struct device *dev, unsigned long t)
	82	{
	83	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
	84
b5167159	85	writel(t, rtc_data->io + STMP3XXX_RTC_SECONDS);
df17f631	86	stmp3xxx_wait_time(rtc_data);
	87	return 0;
	88	}
	89
	90	/* interrupt(s) handler */
	91	static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id)
	92	{
	93	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev_id);
7e794cb7	94	u32 status = readl(rtc_data->io + STMP3XXX_RTC_CTRL);
df17f631	95
47eac337	96	if (status & STMP3XXX_RTC_CTRL_ALARM_IRQ) {
b5167159 WS	97	writel(STMP3XXX_RTC_CTRL_ALARM_IRQ,
b5167159 WS	98	rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
7e794cb7 WS	99	rtc_update_irq(rtc_data->rtc, 1, RTC_AF \| RTC_IRQF);
7e794cb7 WS	100	return IRQ_HANDLED;
df17f631	101	}
df17f631	102
7e794cb7	103	return IRQ_NONE;
df17f631	104	}
	105
	106	static int stmp3xxx_alarm_irq_enable(struct device *dev, unsigned int enabled)
	107	{
	108	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
df17f631	109
df17f631	110	if (enabled) {
b5167159 WS	111	writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN \|
	112	STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN,
	113	rtc_data->io + STMP3XXX_RTC_PERSISTENT0_SET);
	114	writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
	115	rtc_data->io + STMP3XXX_RTC_CTRL_SET);
df17f631	116	} else {
b5167159 WS	117	writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN \|
	118	STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN,
	119	rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
	120	writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
	121	rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
df17f631	122	}
	123	return 0;
	124	}
	125
df17f631	126	static int stmp3xxx_rtc_read_alarm(struct device dev, struct rtc_wkalrm alm)
	127	{
	128	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
	129
b5167159	130	rtc_time_to_tm(readl(rtc_data->io + STMP3XXX_RTC_ALARM), &alm->time);
df17f631	131	return 0;
	132	}
	133
	134	static int stmp3xxx_rtc_set_alarm(struct device dev, struct rtc_wkalrm alm)
	135	{
	136	unsigned long t;
	137	struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
	138
	139	rtc_tm_to_time(&alm->time, &t);
b5167159	140	writel(t, rtc_data->io + STMP3XXX_RTC_ALARM);
7e794cb7 WS	141
	142	stmp3xxx_alarm_irq_enable(dev, alm->enabled);
	143
df17f631	144	return 0;
	145	}
	146
	147	static struct rtc_class_ops stmp3xxx_rtc_ops = {
	148	.alarm_irq_enable =
	149	stmp3xxx_alarm_irq_enable,
df17f631	150	.read_time = stmp3xxx_rtc_gettime,
	151	.set_mmss = stmp3xxx_rtc_set_mmss,
	152	.read_alarm = stmp3xxx_rtc_read_alarm,
	153	.set_alarm = stmp3xxx_rtc_set_alarm,
	154	};
	155
	156	static int stmp3xxx_rtc_remove(struct platform_device *pdev)
	157	{
	158	struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(pdev);
	159
	160	if (!rtc_data)
	161	return 0;
	162
7e794cb7	163	writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
b5167159	164	rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
df17f631	165	free_irq(rtc_data->irq_alarm, &pdev->dev);
df17f631	166	rtc_device_unregister(rtc_data->rtc);
a91d2bab	167	platform_set_drvdata(pdev, NULL);
df17f631	168	iounmap(rtc_data->io);
	169	kfree(rtc_data);
	170
	171	return 0;
	172	}
	173
	174	static int stmp3xxx_rtc_probe(struct platform_device *pdev)
	175	{
	176	struct stmp3xxx_rtc_data *rtc_data;
	177	struct resource *r;
	178	int err;
	179
	180	rtc_data = kzalloc(sizeof *rtc_data, GFP_KERNEL);
	181	if (!rtc_data)
	182	return -ENOMEM;
	183
	184	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	185	if (!r) {
	186	dev_err(&pdev->dev, "failed to get resource\n");
	187	err = -ENXIO;
	188	goto out_free;
	189	}
	190
	191	rtc_data->io = ioremap(r->start, resource_size(r));
	192	if (!rtc_data->io) {
	193	dev_err(&pdev->dev, "ioremap failed\n");
	194	err = -EIO;
	195	goto out_free;
	196	}
	197
	198	rtc_data->irq_alarm = platform_get_irq(pdev, 0);
df17f631	199
b5167159	200	if (!(readl(STMP3XXX_RTC_STAT + rtc_data->io) &
47eac337	201	STMP3XXX_RTC_STAT_RTC_PRESENT)) {
df17f631	202	dev_err(&pdev->dev, "no device onboard\n");
	203	err = -ENODEV;
	204	goto out_remap;
	205	}
	206
a91d2bab WS	207	platform_set_drvdata(pdev, rtc_data);
a91d2bab WS	208
46b21218	209	mxs_reset_block(rtc_data->io);
b5167159	210	writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN \|
47eac337 WS	211	STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN \|
47eac337 WS	212	STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
b5167159	213	rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
a91d2bab	214
7e794cb7 WS	215	writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN \|
	216	STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
	217	rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
	218
df17f631	219	rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev,
	220	&stmp3xxx_rtc_ops, THIS_MODULE);
	221	if (IS_ERR(rtc_data->rtc)) {
	222	err = PTR_ERR(rtc_data->rtc);
	223	goto out_remap;
	224	}
	225
7e794cb7 WS	226	err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt, 0,
7e794cb7 WS	227	"RTC alarm", &pdev->dev);
df17f631	228	if (err) {
	229	dev_err(&pdev->dev, "Cannot claim IRQ%d\n",
	230	rtc_data->irq_alarm);
	231	goto out_irq_alarm;
	232	}
df17f631	233
df17f631	234	return 0;
df17f631	235
df17f631	236	out_irq_alarm:
df17f631	237	rtc_device_unregister(rtc_data->rtc);
df17f631	238	out_remap:
a91d2bab	239	platform_set_drvdata(pdev, NULL);
df17f631	240	iounmap(rtc_data->io);
	241	out_free:
	242	kfree(rtc_data);
	243	return err;
	244	}
	245
	246	#ifdef CONFIG_PM
	247	static int stmp3xxx_rtc_suspend(struct platform_device *dev, pm_message_t state)
	248	{
	249	return 0;
	250	}
	251
	252	static int stmp3xxx_rtc_resume(struct platform_device *dev)
	253	{
	254	struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(dev);
	255
46b21218	256	mxs_reset_block(rtc_data->io);
b5167159	257	writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN \|
47eac337 WS	258	STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE_EN \|
47eac337 WS	259	STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE,
b5167159	260	rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
df17f631	261	return 0;
	262	}
	263	#else
	264	#define stmp3xxx_rtc_suspend NULL
	265	#define stmp3xxx_rtc_resume NULL
	266	#endif
	267
	268	static struct platform_driver stmp3xxx_rtcdrv = {
	269	.probe = stmp3xxx_rtc_probe,
	270	.remove = stmp3xxx_rtc_remove,
	271	.suspend = stmp3xxx_rtc_suspend,
	272	.resume = stmp3xxx_rtc_resume,
	273	.driver = {
	274	.name = "stmp3xxx-rtc",
	275	.owner = THIS_MODULE,
	276	},
	277	};
	278
	279	static int __init stmp3xxx_rtc_init(void)
	280	{
	281	return platform_driver_register(&stmp3xxx_rtcdrv);
	282	}
	283
	284	static void __exit stmp3xxx_rtc_exit(void)
	285	{
	286	platform_driver_unregister(&stmp3xxx_rtcdrv);
	287	}
	288
	289	module_init(stmp3xxx_rtc_init);
	290	module_exit(stmp3xxx_rtc_exit);
	291
	292	MODULE_DESCRIPTION("STMP3xxx RTC Driver");
7e794cb7 WS	293	MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com> and "
7e794cb7 WS	294	"Wolfram Sang <w.sang@pengutronix.de>");
df17f631	295	MODULE_LICENSE("GPL");