[linux-2.6-block.git] / drivers / rtc / rtc-88pm80x.c

/*
 * Real Time Clock driver for Marvell 88PM80x PMIC
 *
 * Copyright (c) 2012 Marvell International Ltd.
 *  Wenzeng Chen<wzch@marvell.com>
 *  Qiao Zhou <zhouqiao@marvell.com>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License. See the file "COPYING" in the main directory of this
 * archive for more details.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/mfd/core.h>
#include <linux/mfd/88pm80x.h>
#include <linux/rtc.h>

#define PM800_RTC_COUNTER1		(0xD1)
#define PM800_RTC_COUNTER2		(0xD2)
#define PM800_RTC_COUNTER3		(0xD3)
#define PM800_RTC_COUNTER4		(0xD4)
#define PM800_RTC_EXPIRE1_1		(0xD5)
#define PM800_RTC_EXPIRE1_2		(0xD6)
#define PM800_RTC_EXPIRE1_3		(0xD7)
#define PM800_RTC_EXPIRE1_4		(0xD8)
#define PM800_RTC_TRIM1			(0xD9)
#define PM800_RTC_TRIM2			(0xDA)
#define PM800_RTC_TRIM3			(0xDB)
#define PM800_RTC_TRIM4			(0xDC)
#define PM800_RTC_EXPIRE2_1		(0xDD)
#define PM800_RTC_EXPIRE2_2		(0xDE)
#define PM800_RTC_EXPIRE2_3		(0xDF)
#define PM800_RTC_EXPIRE2_4		(0xE0)

#define PM800_POWER_DOWN_LOG1	(0xE5)
#define PM800_POWER_DOWN_LOG2	(0xE6)

struct pm80x_rtc_info {
	struct pm80x_chip *chip;
	struct regmap *map;
	struct rtc_device *rtc_dev;
	struct device *dev;

	int irq;
};

static irqreturn_t rtc_update_handler(int irq, void *data)
{
	struct pm80x_rtc_info *info = (struct pm80x_rtc_info *)data;
	int mask;

	mask = PM800_ALARM | PM800_ALARM_WAKEUP;
	regmap_update_bits(info->map, PM800_RTC_CONTROL, mask | PM800_ALARM1_EN,
			   mask);
	rtc_update_irq(info->rtc_dev, 1, RTC_AF);
	return IRQ_HANDLED;
}

static int pm80x_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
	struct pm80x_rtc_info *info = dev_get_drvdata(dev);

	if (enabled)
		regmap_update_bits(info->map, PM800_RTC_CONTROL,
				   PM800_ALARM1_EN, PM800_ALARM1_EN);
	else
		regmap_update_bits(info->map, PM800_RTC_CONTROL,
				   PM800_ALARM1_EN, 0);
	return 0;
}

/*
 * Calculate the next alarm time given the requested alarm time mask
 * and the current time.
 */
static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now,
				struct rtc_time *alrm)
{
	unsigned long next_time;
	unsigned long now_time;

	next->tm_year = now->tm_year;
	next->tm_mon = now->tm_mon;
	next->tm_mday = now->tm_mday;
	next->tm_hour = alrm->tm_hour;
	next->tm_min = alrm->tm_min;
	next->tm_sec = alrm->tm_sec;

	now_time = rtc_tm_to_time64(now);
	next_time = rtc_tm_to_time64(next);

	if (next_time < now_time) {
		/* Advance one day */
		next_time += 60 * 60 * 24;
		rtc_time64_to_tm(next_time, next);
	}
}

static int pm80x_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	unsigned char buf[4];
	unsigned long ticks, base, data;
	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
	base = ((unsigned long)buf[3] << 24) | (buf[2] << 16) |
		(buf[1] << 8) | buf[0];
	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);

	/* load 32-bit read-only counter */
	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
	data = ((unsigned long)buf[3] << 24) | (buf[2] << 16) |
		(buf[1] << 8) | buf[0];
	ticks = base + data;
	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
		base, data, ticks);
	rtc_time64_to_tm(ticks, tm);
	return 0;
}

static int pm80x_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	unsigned char buf[4];
	unsigned long ticks, base, data;

	ticks = rtc_tm_to_time64(tm);

	/* load 32-bit read-only counter */
	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
	data = ((unsigned long)buf[3] << 24) | (buf[2] << 16) |
		(buf[1] << 8) | buf[0];
	base = ticks - data;
	dev_dbg(info->dev, "set base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
		base, data, ticks);
	buf[0] = base & 0xFF;
	buf[1] = (base >> 8) & 0xFF;
	buf[2] = (base >> 16) & 0xFF;
	buf[3] = (base >> 24) & 0xFF;
	regmap_raw_write(info->map, PM800_RTC_EXPIRE2_1, buf, 4);

	return 0;
}

static int pm80x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	unsigned char buf[4];
	unsigned long ticks, base, data;
	int ret;

	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
	base = ((unsigned long)buf[3] << 24) | (buf[2] << 16) |
		(buf[1] << 8) | buf[0];
	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);

	regmap_raw_read(info->map, PM800_RTC_EXPIRE1_1, buf, 4);
	data = ((unsigned long)buf[3] << 24) | (buf[2] << 16) |
		(buf[1] << 8) | buf[0];
	ticks = base + data;
	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
		base, data, ticks);

	rtc_time64_to_tm(ticks, &alrm->time);
	regmap_read(info->map, PM800_RTC_CONTROL, &ret);
	alrm->enabled = (ret & PM800_ALARM1_EN) ? 1 : 0;
	alrm->pending = (ret & (PM800_ALARM | PM800_ALARM_WAKEUP)) ? 1 : 0;
	return 0;
}

static int pm80x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	struct rtc_time now_tm, alarm_tm;
	unsigned long ticks, base, data;
	unsigned char buf[4];
	int mask;

	regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_ALARM1_EN, 0);

	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
	base = ((unsigned long)buf[3] << 24) | (buf[2] << 16) |
		(buf[1] << 8) | buf[0];
	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);

	/* load 32-bit read-only counter */
	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
	data = ((unsigned long)buf[3] << 24) | (buf[2] << 16) |
		(buf[1] << 8) | buf[0];
	ticks = base + data;
	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
		base, data, ticks);

	rtc_time64_to_tm(ticks, &now_tm);
	dev_dbg(info->dev, "%s, now time : %lu\n", __func__, ticks);
	rtc_next_alarm_time(&alarm_tm, &now_tm, &alrm->time);
	/* get new ticks for alarm in 24 hours */
	ticks = rtc_tm_to_time64(&alarm_tm);
	dev_dbg(info->dev, "%s, alarm time: %lu\n", __func__, ticks);
	data = ticks - base;

	buf[0] = data & 0xff;
	buf[1] = (data >> 8) & 0xff;
	buf[2] = (data >> 16) & 0xff;
	buf[3] = (data >> 24) & 0xff;
	regmap_raw_write(info->map, PM800_RTC_EXPIRE1_1, buf, 4);
	if (alrm->enabled) {
		mask = PM800_ALARM | PM800_ALARM_WAKEUP | PM800_ALARM1_EN;
		regmap_update_bits(info->map, PM800_RTC_CONTROL, mask, mask);
	} else {
		mask = PM800_ALARM | PM800_ALARM_WAKEUP | PM800_ALARM1_EN;
		regmap_update_bits(info->map, PM800_RTC_CONTROL, mask,
				   PM800_ALARM | PM800_ALARM_WAKEUP);
	}
	return 0;
}

static const struct rtc_class_ops pm80x_rtc_ops = {
	.read_time = pm80x_rtc_read_time,
	.set_time = pm80x_rtc_set_time,
	.read_alarm = pm80x_rtc_read_alarm,
	.set_alarm = pm80x_rtc_set_alarm,
	.alarm_irq_enable = pm80x_rtc_alarm_irq_enable,
};

#ifdef CONFIG_PM_SLEEP
static int pm80x_rtc_suspend(struct device *dev)
{
	return pm80x_dev_suspend(dev);
}

static int pm80x_rtc_resume(struct device *dev)
{
	return pm80x_dev_resume(dev);
}
#endif

static SIMPLE_DEV_PM_OPS(pm80x_rtc_pm_ops, pm80x_rtc_suspend, pm80x_rtc_resume);

static int pm80x_rtc_probe(struct platform_device *pdev)
{
	struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
	struct pm80x_rtc_pdata *pdata = dev_get_platdata(&pdev->dev);
	struct pm80x_rtc_info *info;
	struct device_node *node = pdev->dev.of_node;
	int ret;

	if (!pdata && !node) {
		dev_err(&pdev->dev,
			"pm80x-rtc requires platform data or of_node\n");
		return -EINVAL;
	}

	if (!pdata) {
		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
		if (!pdata) {
			dev_err(&pdev->dev, "failed to allocate memory\n");
			return -ENOMEM;
		}
	}

	info =
	    devm_kzalloc(&pdev->dev, sizeof(struct pm80x_rtc_info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;
	info->irq = platform_get_irq(pdev, 0);
	if (info->irq < 0) {
		dev_err(&pdev->dev, "No IRQ resource!\n");
		ret = -EINVAL;
		goto out;
	}

	info->chip = chip;
	info->map = chip->regmap;
	if (!info->map) {
		dev_err(&pdev->dev, "no regmap!\n");
		ret = -EINVAL;
		goto out;
	}

	info->dev = &pdev->dev;
	dev_set_drvdata(&pdev->dev, info);

	info->rtc_dev = devm_rtc_allocate_device(&pdev->dev);
	if (IS_ERR(info->rtc_dev))
		return PTR_ERR(info->rtc_dev);

	ret = pm80x_request_irq(chip, info->irq, rtc_update_handler,
				IRQF_ONESHOT, "rtc", info);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
			info->irq, ret);
		goto out;
	}

	info->rtc_dev->ops = &pm80x_rtc_ops;
	info->rtc_dev->range_max = U32_MAX;

	ret = rtc_register_device(info->rtc_dev);
	if (ret) {
		dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
		goto out_rtc;
	}
	/*
	 * enable internal XO instead of internal 3.25MHz clock since it can
	 * free running in PMIC power-down state.
	 */
	regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_RTC1_USE_XO,
			   PM800_RTC1_USE_XO);

	/* remember whether this power up is caused by PMIC RTC or not */
	info->rtc_dev->dev.platform_data = &pdata->rtc_wakeup;

	device_init_wakeup(&pdev->dev, 1);

	return 0;
out_rtc:
	pm80x_free_irq(chip, info->irq, info);
out:
	return ret;
}

static int pm80x_rtc_remove(struct platform_device *pdev)
{
	struct pm80x_rtc_info *info = platform_get_drvdata(pdev);
	pm80x_free_irq(info->chip, info->irq, info);
	return 0;
}

static struct platform_driver pm80x_rtc_driver = {
	.driver = {
		   .name = "88pm80x-rtc",
		   .pm = &pm80x_rtc_pm_ops,
		   },
	.probe = pm80x_rtc_probe,
	.remove = pm80x_rtc_remove,
};

module_platform_driver(pm80x_rtc_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Marvell 88PM80x RTC driver");
MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
MODULE_ALIAS("platform:88pm80x-rtc");
Commit	Line	Data
2985c29c QZ	1	/*
	2	* Real Time Clock driver for Marvell 88PM80x PMIC
	3	*
	4	* Copyright (c) 2012 Marvell International Ltd.
	5	* Wenzeng Chen<wzch@marvell.com>
	6	* Qiao Zhou <zhouqiao@marvell.com>
	7	*
	8	* This file is subject to the terms and conditions of the GNU General
	9	* Public License. See the file "COPYING" in the main directory of this
	10	* archive for more details.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#include <linux/kernel.h>
	23	#include <linux/module.h>
	24	#include <linux/slab.h>
	25	#include <linux/regmap.h>
	26	#include <linux/mfd/core.h>
	27	#include <linux/mfd/88pm80x.h>
	28	#include <linux/rtc.h>
	29
	30	#define PM800_RTC_COUNTER1 (0xD1)
	31	#define PM800_RTC_COUNTER2 (0xD2)
	32	#define PM800_RTC_COUNTER3 (0xD3)
	33	#define PM800_RTC_COUNTER4 (0xD4)
	34	#define PM800_RTC_EXPIRE1_1 (0xD5)
	35	#define PM800_RTC_EXPIRE1_2 (0xD6)
	36	#define PM800_RTC_EXPIRE1_3 (0xD7)
	37	#define PM800_RTC_EXPIRE1_4 (0xD8)
	38	#define PM800_RTC_TRIM1 (0xD9)
	39	#define PM800_RTC_TRIM2 (0xDA)
	40	#define PM800_RTC_TRIM3 (0xDB)
	41	#define PM800_RTC_TRIM4 (0xDC)
	42	#define PM800_RTC_EXPIRE2_1 (0xDD)
	43	#define PM800_RTC_EXPIRE2_2 (0xDE)
	44	#define PM800_RTC_EXPIRE2_3 (0xDF)
	45	#define PM800_RTC_EXPIRE2_4 (0xE0)
	46
	47	#define PM800_POWER_DOWN_LOG1 (0xE5)
	48	#define PM800_POWER_DOWN_LOG2 (0xE6)
	49
	50	struct pm80x_rtc_info {
	51	struct pm80x_chip *chip;
	52	struct regmap *map;
	53	struct rtc_device *rtc_dev;
	54	struct device *dev;
2985c29c QZ	55
2985c29c QZ	56	int irq;
2985c29c QZ	57	};
	58
	59	static irqreturn_t rtc_update_handler(int irq, void *data)
	60	{
	61	struct pm80x_rtc_info info = (struct pm80x_rtc_info )data;
	62	int mask;
	63
	64	mask = PM800_ALARM \| PM800_ALARM_WAKEUP;
	65	regmap_update_bits(info->map, PM800_RTC_CONTROL, mask \| PM800_ALARM1_EN,
	66	mask);
	67	rtc_update_irq(info->rtc_dev, 1, RTC_AF);
	68	return IRQ_HANDLED;
	69	}
	70
	71	static int pm80x_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
	72	{
	73	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	74
	75	if (enabled)
	76	regmap_update_bits(info->map, PM800_RTC_CONTROL,
	77	PM800_ALARM1_EN, PM800_ALARM1_EN);
	78	else
	79	regmap_update_bits(info->map, PM800_RTC_CONTROL,
	80	PM800_ALARM1_EN, 0);
	81	return 0;
	82	}
	83
	84	/*
	85	* Calculate the next alarm time given the requested alarm time mask
	86	* and the current time.
	87	*/
	88	static void rtc_next_alarm_time(struct rtc_time next, struct rtc_time now,
	89	struct rtc_time *alrm)
	90	{
	91	unsigned long next_time;
	92	unsigned long now_time;
	93
	94	next->tm_year = now->tm_year;
	95	next->tm_mon = now->tm_mon;
	96	next->tm_mday = now->tm_mday;
	97	next->tm_hour = alrm->tm_hour;
	98	next->tm_min = alrm->tm_min;
	99	next->tm_sec = alrm->tm_sec;
	100
02f3712f AB	101	now_time = rtc_tm_to_time64(now);
02f3712f AB	102	next_time = rtc_tm_to_time64(next);
2985c29c QZ	103
	104	if (next_time < now_time) {
	105	/* Advance one day */
	106	next_time += 60 * 60 * 24;
02f3712f	107	rtc_time64_to_tm(next_time, next);
2985c29c QZ	108	}
	109	}
	110
	111	static int pm80x_rtc_read_time(struct device dev, struct rtc_time tm)
	112	{
	113	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	114	unsigned char buf[4];
	115	unsigned long ticks, base, data;
	116	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
fb0b3225 CIK	117	base = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	118	(buf[1] << 8) \| buf[0];
2985c29c QZ	119	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
	120
	121	/* load 32-bit read-only counter */
	122	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
fb0b3225 CIK	123	data = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	124	(buf[1] << 8) \| buf[0];
2985c29c QZ	125	ticks = base + data;
	126	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
	127	base, data, ticks);
02f3712f	128	rtc_time64_to_tm(ticks, tm);
2985c29c QZ	129	return 0;
	130	}
	131
	132	static int pm80x_rtc_set_time(struct device dev, struct rtc_time tm)
	133	{
	134	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	135	unsigned char buf[4];
	136	unsigned long ticks, base, data;
39ba6942	137
02f3712f	138	ticks = rtc_tm_to_time64(tm);
2985c29c QZ	139
	140	/* load 32-bit read-only counter */
	141	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
fb0b3225 CIK	142	data = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	143	(buf[1] << 8) \| buf[0];
2985c29c QZ	144	base = ticks - data;
	145	dev_dbg(info->dev, "set base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
	146	base, data, ticks);
	147	buf[0] = base & 0xFF;
	148	buf[1] = (base >> 8) & 0xFF;
	149	buf[2] = (base >> 16) & 0xFF;
	150	buf[3] = (base >> 24) & 0xFF;
	151	regmap_raw_write(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
	152
	153	return 0;
	154	}
	155
	156	static int pm80x_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
	157	{
	158	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	159	unsigned char buf[4];
	160	unsigned long ticks, base, data;
	161	int ret;
	162
	163	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
fb0b3225 CIK	164	base = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	165	(buf[1] << 8) \| buf[0];
2985c29c QZ	166	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
	167
	168	regmap_raw_read(info->map, PM800_RTC_EXPIRE1_1, buf, 4);
fb0b3225 CIK	169	data = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	170	(buf[1] << 8) \| buf[0];
2985c29c QZ	171	ticks = base + data;
	172	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
	173	base, data, ticks);
	174
02f3712f	175	rtc_time64_to_tm(ticks, &alrm->time);
2985c29c QZ	176	regmap_read(info->map, PM800_RTC_CONTROL, &ret);
	177	alrm->enabled = (ret & PM800_ALARM1_EN) ? 1 : 0;
	178	alrm->pending = (ret & (PM800_ALARM \| PM800_ALARM_WAKEUP)) ? 1 : 0;
	179	return 0;
	180	}
	181
	182	static int pm80x_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
	183	{
	184	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	185	struct rtc_time now_tm, alarm_tm;
	186	unsigned long ticks, base, data;
	187	unsigned char buf[4];
	188	int mask;
	189
	190	regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_ALARM1_EN, 0);
	191
	192	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
fb0b3225 CIK	193	base = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	194	(buf[1] << 8) \| buf[0];
2985c29c QZ	195	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
	196
	197	/* load 32-bit read-only counter */
	198	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
fb0b3225 CIK	199	data = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	200	(buf[1] << 8) \| buf[0];
2985c29c QZ	201	ticks = base + data;
	202	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
	203	base, data, ticks);
	204
02f3712f	205	rtc_time64_to_tm(ticks, &now_tm);
2985c29c QZ	206	dev_dbg(info->dev, "%s, now time : %lu\n", __func__, ticks);
	207	rtc_next_alarm_time(&alarm_tm, &now_tm, &alrm->time);
	208	/* get new ticks for alarm in 24 hours */
02f3712f	209	ticks = rtc_tm_to_time64(&alarm_tm);
2985c29c QZ	210	dev_dbg(info->dev, "%s, alarm time: %lu\n", __func__, ticks);
	211	data = ticks - base;
	212
	213	buf[0] = data & 0xff;
	214	buf[1] = (data >> 8) & 0xff;
	215	buf[2] = (data >> 16) & 0xff;
	216	buf[3] = (data >> 24) & 0xff;
	217	regmap_raw_write(info->map, PM800_RTC_EXPIRE1_1, buf, 4);
	218	if (alrm->enabled) {
	219	mask = PM800_ALARM \| PM800_ALARM_WAKEUP \| PM800_ALARM1_EN;
	220	regmap_update_bits(info->map, PM800_RTC_CONTROL, mask, mask);
	221	} else {
	222	mask = PM800_ALARM \| PM800_ALARM_WAKEUP \| PM800_ALARM1_EN;
	223	regmap_update_bits(info->map, PM800_RTC_CONTROL, mask,
	224	PM800_ALARM \| PM800_ALARM_WAKEUP);
	225	}
	226	return 0;
	227	}
	228
	229	static const struct rtc_class_ops pm80x_rtc_ops = {
	230	.read_time = pm80x_rtc_read_time,
	231	.set_time = pm80x_rtc_set_time,
	232	.read_alarm = pm80x_rtc_read_alarm,
	233	.set_alarm = pm80x_rtc_set_alarm,
	234	.alarm_irq_enable = pm80x_rtc_alarm_irq_enable,
	235	};
	236
569b05a3	237	#ifdef CONFIG_PM_SLEEP
2985c29c QZ	238	static int pm80x_rtc_suspend(struct device *dev)
	239	{
	240	return pm80x_dev_suspend(dev);
	241	}
	242
	243	static int pm80x_rtc_resume(struct device *dev)
	244	{
	245	return pm80x_dev_resume(dev);
	246	}
	247	#endif
	248
	249	static SIMPLE_DEV_PM_OPS(pm80x_rtc_pm_ops, pm80x_rtc_suspend, pm80x_rtc_resume);
	250
5a167f45	251	static int pm80x_rtc_probe(struct platform_device *pdev)
2985c29c QZ	252	{
2985c29c QZ	253	struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
4ab82103	254	struct pm80x_rtc_pdata *pdata = dev_get_platdata(&pdev->dev);
2985c29c	255	struct pm80x_rtc_info *info;
4ab82103	256	struct device_node *node = pdev->dev.of_node;
2985c29c QZ	257	int ret;
2985c29c QZ	258
4ab82103 VH	259	if (!pdata && !node) {
	260	dev_err(&pdev->dev,
	261	"pm80x-rtc requires platform data or of_node\n");
	262	return -EINVAL;
	263	}
	264
	265	if (!pdata) {
	266	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	267	if (!pdata) {
	268	dev_err(&pdev->dev, "failed to allocate memory\n");
	269	return -ENOMEM;
	270	}
	271	}
2985c29c QZ	272
	273	info =
	274	devm_kzalloc(&pdev->dev, sizeof(struct pm80x_rtc_info), GFP_KERNEL);
	275	if (!info)
	276	return -ENOMEM;
	277	info->irq = platform_get_irq(pdev, 0);
	278	if (info->irq < 0) {
	279	dev_err(&pdev->dev, "No IRQ resource!\n");
	280	ret = -EINVAL;
	281	goto out;
	282	}
	283
	284	info->chip = chip;
	285	info->map = chip->regmap;
	286	if (!info->map) {
	287	dev_err(&pdev->dev, "no regmap!\n");
	288	ret = -EINVAL;
	289	goto out;
	290	}
	291
	292	info->dev = &pdev->dev;
	293	dev_set_drvdata(&pdev->dev, info);
	294
661eb89a AB	295	info->rtc_dev = devm_rtc_allocate_device(&pdev->dev);
	296	if (IS_ERR(info->rtc_dev))
	297	return PTR_ERR(info->rtc_dev);
	298
2985c29c QZ	299	ret = pm80x_request_irq(chip, info->irq, rtc_update_handler,
	300	IRQF_ONESHOT, "rtc", info);
	301	if (ret < 0) {
	302	dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
	303	info->irq, ret);
	304	goto out;
	305	}
	306
661eb89a	307	info->rtc_dev->ops = &pm80x_rtc_ops;
39ba6942	308	info->rtc_dev->range_max = U32_MAX;
661eb89a AB	309
	310	ret = rtc_register_device(info->rtc_dev);
	311	if (ret) {
2985c29c QZ	312	dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
	313	goto out_rtc;
	314	}
	315	/*
	316	* enable internal XO instead of internal 3.25MHz clock since it can
	317	* free running in PMIC power-down state.
	318	*/
	319	regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_RTC1_USE_XO,
	320	PM800_RTC1_USE_XO);
	321
4ab82103 VH	322	/* remember whether this power up is caused by PMIC RTC or not */
4ab82103 VH	323	info->rtc_dev->dev.platform_data = &pdata->rtc_wakeup;
2985c29c QZ	324
	325	device_init_wakeup(&pdev->dev, 1);
	326
	327	return 0;
	328	out_rtc:
	329	pm80x_free_irq(chip, info->irq, info);
	330	out:
2985c29c QZ	331	return ret;
	332	}
	333
5a167f45	334	static int pm80x_rtc_remove(struct platform_device *pdev)
2985c29c QZ	335	{
2985c29c QZ	336	struct pm80x_rtc_info *info = platform_get_drvdata(pdev);
2985c29c	337	pm80x_free_irq(info->chip, info->irq, info);
2985c29c QZ	338	return 0;
	339	}
	340
	341	static struct platform_driver pm80x_rtc_driver = {
	342	.driver = {
	343	.name = "88pm80x-rtc",
2985c29c QZ	344	.pm = &pm80x_rtc_pm_ops,
	345	},
	346	.probe = pm80x_rtc_probe,
5a167f45	347	.remove = pm80x_rtc_remove,
2985c29c QZ	348	};
	349
	350	module_platform_driver(pm80x_rtc_driver);
	351
	352	MODULE_LICENSE("GPL");
	353	MODULE_DESCRIPTION("Marvell 88PM80x RTC driver");
	354	MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
	355	MODULE_ALIAS("platform:88pm80x-rtc");