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

// SPDX-License-Identifier: GPL-2.0
/*
 * Real Time Clock driver for Marvell 88PM80x PMIC
 *
 * Copyright (c) 2012 Marvell International Ltd.
 *  Wenzeng Chen<wzch@marvell.com>
 *  Qiao Zhou <zhouqiao@marvell.com>
 */

#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) {
		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 = devm_rtc_register_device(info->rtc_dev);
	if (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
8bc9630a	1	// SPDX-License-Identifier: GPL-2.0
2985c29c QZ	2	/*
	3	* Real Time Clock driver for Marvell 88PM80x PMIC
	4	*
	5	* Copyright (c) 2012 Marvell International Ltd.
	6	* Wenzeng Chen<wzch@marvell.com>
	7	* Qiao Zhou <zhouqiao@marvell.com>
2985c29c QZ	8	*/
	9
	10	#include <linux/kernel.h>
	11	#include <linux/module.h>
	12	#include <linux/slab.h>
	13	#include <linux/regmap.h>
	14	#include <linux/mfd/core.h>
	15	#include <linux/mfd/88pm80x.h>
	16	#include <linux/rtc.h>
	17
	18	#define PM800_RTC_COUNTER1 (0xD1)
	19	#define PM800_RTC_COUNTER2 (0xD2)
	20	#define PM800_RTC_COUNTER3 (0xD3)
	21	#define PM800_RTC_COUNTER4 (0xD4)
	22	#define PM800_RTC_EXPIRE1_1 (0xD5)
	23	#define PM800_RTC_EXPIRE1_2 (0xD6)
	24	#define PM800_RTC_EXPIRE1_3 (0xD7)
	25	#define PM800_RTC_EXPIRE1_4 (0xD8)
	26	#define PM800_RTC_TRIM1 (0xD9)
	27	#define PM800_RTC_TRIM2 (0xDA)
	28	#define PM800_RTC_TRIM3 (0xDB)
	29	#define PM800_RTC_TRIM4 (0xDC)
	30	#define PM800_RTC_EXPIRE2_1 (0xDD)
	31	#define PM800_RTC_EXPIRE2_2 (0xDE)
	32	#define PM800_RTC_EXPIRE2_3 (0xDF)
	33	#define PM800_RTC_EXPIRE2_4 (0xE0)
	34
	35	#define PM800_POWER_DOWN_LOG1 (0xE5)
	36	#define PM800_POWER_DOWN_LOG2 (0xE6)
	37
	38	struct pm80x_rtc_info {
	39	struct pm80x_chip *chip;
	40	struct regmap *map;
	41	struct rtc_device *rtc_dev;
	42	struct device *dev;
2985c29c QZ	43
2985c29c QZ	44	int irq;
2985c29c QZ	45	};
	46
	47	static irqreturn_t rtc_update_handler(int irq, void *data)
	48	{
	49	struct pm80x_rtc_info info = (struct pm80x_rtc_info )data;
	50	int mask;
	51
	52	mask = PM800_ALARM \| PM800_ALARM_WAKEUP;
	53	regmap_update_bits(info->map, PM800_RTC_CONTROL, mask \| PM800_ALARM1_EN,
	54	mask);
	55	rtc_update_irq(info->rtc_dev, 1, RTC_AF);
	56	return IRQ_HANDLED;
	57	}
	58
	59	static int pm80x_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
	60	{
	61	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	62
	63	if (enabled)
	64	regmap_update_bits(info->map, PM800_RTC_CONTROL,
	65	PM800_ALARM1_EN, PM800_ALARM1_EN);
	66	else
	67	regmap_update_bits(info->map, PM800_RTC_CONTROL,
	68	PM800_ALARM1_EN, 0);
	69	return 0;
	70	}
	71
	72	/*
	73	* Calculate the next alarm time given the requested alarm time mask
	74	* and the current time.
	75	*/
	76	static void rtc_next_alarm_time(struct rtc_time next, struct rtc_time now,
	77	struct rtc_time *alrm)
	78	{
	79	unsigned long next_time;
	80	unsigned long now_time;
	81
	82	next->tm_year = now->tm_year;
	83	next->tm_mon = now->tm_mon;
	84	next->tm_mday = now->tm_mday;
	85	next->tm_hour = alrm->tm_hour;
	86	next->tm_min = alrm->tm_min;
	87	next->tm_sec = alrm->tm_sec;
	88
02f3712f AB	89	now_time = rtc_tm_to_time64(now);
02f3712f AB	90	next_time = rtc_tm_to_time64(next);
2985c29c QZ	91
	92	if (next_time < now_time) {
	93	/* Advance one day */
	94	next_time += 60 * 60 * 24;
02f3712f	95	rtc_time64_to_tm(next_time, next);
2985c29c QZ	96	}
	97	}
	98
	99	static int pm80x_rtc_read_time(struct device dev, struct rtc_time tm)
	100	{
	101	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	102	unsigned char buf[4];
	103	unsigned long ticks, base, data;
	104	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
fb0b3225 CIK	105	base = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	106	(buf[1] << 8) \| buf[0];
2985c29c QZ	107	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
	108
	109	/* load 32-bit read-only counter */
	110	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
fb0b3225 CIK	111	data = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	112	(buf[1] << 8) \| buf[0];
2985c29c QZ	113	ticks = base + data;
	114	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
	115	base, data, ticks);
02f3712f	116	rtc_time64_to_tm(ticks, tm);
2985c29c QZ	117	return 0;
	118	}
	119
	120	static int pm80x_rtc_set_time(struct device dev, struct rtc_time tm)
	121	{
	122	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	123	unsigned char buf[4];
	124	unsigned long ticks, base, data;
39ba6942	125
02f3712f	126	ticks = rtc_tm_to_time64(tm);
2985c29c QZ	127
	128	/* load 32-bit read-only counter */
	129	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
fb0b3225 CIK	130	data = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	131	(buf[1] << 8) \| buf[0];
2985c29c QZ	132	base = ticks - data;
	133	dev_dbg(info->dev, "set base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
	134	base, data, ticks);
	135	buf[0] = base & 0xFF;
	136	buf[1] = (base >> 8) & 0xFF;
	137	buf[2] = (base >> 16) & 0xFF;
	138	buf[3] = (base >> 24) & 0xFF;
	139	regmap_raw_write(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
	140
	141	return 0;
	142	}
	143
	144	static int pm80x_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
	145	{
	146	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	147	unsigned char buf[4];
	148	unsigned long ticks, base, data;
	149	int ret;
	150
	151	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
fb0b3225 CIK	152	base = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	153	(buf[1] << 8) \| buf[0];
2985c29c QZ	154	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
	155
	156	regmap_raw_read(info->map, PM800_RTC_EXPIRE1_1, buf, 4);
fb0b3225 CIK	157	data = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	158	(buf[1] << 8) \| buf[0];
2985c29c QZ	159	ticks = base + data;
	160	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
	161	base, data, ticks);
	162
02f3712f	163	rtc_time64_to_tm(ticks, &alrm->time);
2985c29c QZ	164	regmap_read(info->map, PM800_RTC_CONTROL, &ret);
	165	alrm->enabled = (ret & PM800_ALARM1_EN) ? 1 : 0;
	166	alrm->pending = (ret & (PM800_ALARM \| PM800_ALARM_WAKEUP)) ? 1 : 0;
	167	return 0;
	168	}
	169
	170	static int pm80x_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
	171	{
	172	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
	173	struct rtc_time now_tm, alarm_tm;
	174	unsigned long ticks, base, data;
	175	unsigned char buf[4];
	176	int mask;
	177
	178	regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_ALARM1_EN, 0);
	179
	180	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
fb0b3225 CIK	181	base = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	182	(buf[1] << 8) \| buf[0];
2985c29c QZ	183	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
	184
	185	/* load 32-bit read-only counter */
	186	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
fb0b3225 CIK	187	data = ((unsigned long)buf[3] << 24) \| (buf[2] << 16) \|
fb0b3225 CIK	188	(buf[1] << 8) \| buf[0];
2985c29c QZ	189	ticks = base + data;
	190	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
	191	base, data, ticks);
	192
02f3712f	193	rtc_time64_to_tm(ticks, &now_tm);
2985c29c QZ	194	dev_dbg(info->dev, "%s, now time : %lu\n", __func__, ticks);
	195	rtc_next_alarm_time(&alarm_tm, &now_tm, &alrm->time);
	196	/* get new ticks for alarm in 24 hours */
02f3712f	197	ticks = rtc_tm_to_time64(&alarm_tm);
2985c29c QZ	198	dev_dbg(info->dev, "%s, alarm time: %lu\n", __func__, ticks);
	199	data = ticks - base;
	200
	201	buf[0] = data & 0xff;
	202	buf[1] = (data >> 8) & 0xff;
	203	buf[2] = (data >> 16) & 0xff;
	204	buf[3] = (data >> 24) & 0xff;
	205	regmap_raw_write(info->map, PM800_RTC_EXPIRE1_1, buf, 4);
	206	if (alrm->enabled) {
	207	mask = PM800_ALARM \| PM800_ALARM_WAKEUP \| PM800_ALARM1_EN;
	208	regmap_update_bits(info->map, PM800_RTC_CONTROL, mask, mask);
	209	} else {
	210	mask = PM800_ALARM \| PM800_ALARM_WAKEUP \| PM800_ALARM1_EN;
	211	regmap_update_bits(info->map, PM800_RTC_CONTROL, mask,
	212	PM800_ALARM \| PM800_ALARM_WAKEUP);
	213	}
	214	return 0;
	215	}
	216
	217	static const struct rtc_class_ops pm80x_rtc_ops = {
	218	.read_time = pm80x_rtc_read_time,
	219	.set_time = pm80x_rtc_set_time,
	220	.read_alarm = pm80x_rtc_read_alarm,
	221	.set_alarm = pm80x_rtc_set_alarm,
	222	.alarm_irq_enable = pm80x_rtc_alarm_irq_enable,
	223	};
	224
569b05a3	225	#ifdef CONFIG_PM_SLEEP
2985c29c QZ	226	static int pm80x_rtc_suspend(struct device *dev)
	227	{
	228	return pm80x_dev_suspend(dev);
	229	}
	230
	231	static int pm80x_rtc_resume(struct device *dev)
	232	{
	233	return pm80x_dev_resume(dev);
	234	}
	235	#endif
	236
	237	static SIMPLE_DEV_PM_OPS(pm80x_rtc_pm_ops, pm80x_rtc_suspend, pm80x_rtc_resume);
	238
5a167f45	239	static int pm80x_rtc_probe(struct platform_device *pdev)
2985c29c QZ	240	{
2985c29c QZ	241	struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
4ab82103	242	struct pm80x_rtc_pdata *pdata = dev_get_platdata(&pdev->dev);
2985c29c	243	struct pm80x_rtc_info *info;
4ab82103	244	struct device_node *node = pdev->dev.of_node;
2985c29c QZ	245	int ret;
2985c29c QZ	246
4ab82103 VH	247	if (!pdata && !node) {
	248	dev_err(&pdev->dev,
	249	"pm80x-rtc requires platform data or of_node\n");
	250	return -EINVAL;
	251	}
	252
	253	if (!pdata) {
	254	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	255	if (!pdata) {
	256	dev_err(&pdev->dev, "failed to allocate memory\n");
	257	return -ENOMEM;
	258	}
	259	}
2985c29c QZ	260
	261	info =
	262	devm_kzalloc(&pdev->dev, sizeof(struct pm80x_rtc_info), GFP_KERNEL);
	263	if (!info)
	264	return -ENOMEM;
	265	info->irq = platform_get_irq(pdev, 0);
	266	if (info->irq < 0) {
2985c29c QZ	267	ret = -EINVAL;
	268	goto out;
	269	}
	270
	271	info->chip = chip;
	272	info->map = chip->regmap;
	273	if (!info->map) {
	274	dev_err(&pdev->dev, "no regmap!\n");
	275	ret = -EINVAL;
	276	goto out;
	277	}
	278
	279	info->dev = &pdev->dev;
	280	dev_set_drvdata(&pdev->dev, info);
	281
661eb89a AB	282	info->rtc_dev = devm_rtc_allocate_device(&pdev->dev);
	283	if (IS_ERR(info->rtc_dev))
	284	return PTR_ERR(info->rtc_dev);
	285
2985c29c QZ	286	ret = pm80x_request_irq(chip, info->irq, rtc_update_handler,
	287	IRQF_ONESHOT, "rtc", info);
	288	if (ret < 0) {
	289	dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
	290	info->irq, ret);
	291	goto out;
	292	}
	293
661eb89a	294	info->rtc_dev->ops = &pm80x_rtc_ops;
39ba6942	295	info->rtc_dev->range_max = U32_MAX;
661eb89a	296
fdcfd854	297	ret = devm_rtc_register_device(info->rtc_dev);
44c638ce	298	if (ret)
2985c29c	299	goto out_rtc;
44c638ce	300
2985c29c QZ	301	/*
	302	* enable internal XO instead of internal 3.25MHz clock since it can
	303	* free running in PMIC power-down state.
	304	*/
	305	regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_RTC1_USE_XO,
	306	PM800_RTC1_USE_XO);
	307
4ab82103 VH	308	/* remember whether this power up is caused by PMIC RTC or not */
4ab82103 VH	309	info->rtc_dev->dev.platform_data = &pdata->rtc_wakeup;
2985c29c QZ	310
	311	device_init_wakeup(&pdev->dev, 1);
	312
	313	return 0;
	314	out_rtc:
	315	pm80x_free_irq(chip, info->irq, info);
	316	out:
2985c29c QZ	317	return ret;
	318	}
	319
5a167f45	320	static int pm80x_rtc_remove(struct platform_device *pdev)
2985c29c QZ	321	{
2985c29c QZ	322	struct pm80x_rtc_info *info = platform_get_drvdata(pdev);
2985c29c	323	pm80x_free_irq(info->chip, info->irq, info);
2985c29c QZ	324	return 0;
	325	}
	326
	327	static struct platform_driver pm80x_rtc_driver = {
	328	.driver = {
	329	.name = "88pm80x-rtc",
2985c29c QZ	330	.pm = &pm80x_rtc_pm_ops,
	331	},
	332	.probe = pm80x_rtc_probe,
5a167f45	333	.remove = pm80x_rtc_remove,
2985c29c QZ	334	};
	335
	336	module_platform_driver(pm80x_rtc_driver);
	337
	338	MODULE_LICENSE("GPL");
	339	MODULE_DESCRIPTION("Marvell 88PM80x RTC driver");
	340	MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
	341	MODULE_ALIAS("platform:88pm80x-rtc");