[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;
	struct delayed_work calib_work;

	int irq;
	int vrtc;
};

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;

	rtc_tm_to_time(now, &now_time);
	rtc_tm_to_time(next, &next_time);

	if (next_time < now_time) {
		/* Advance one day */
		next_time += 60 * 60 * 24;
		rtc_time_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 = (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 = (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_time_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;
	if ((tm->tm_year < 70) || (tm->tm_year > 138)) {
		dev_dbg(info->dev,
			"Set time %d out of range. Please set time between 1970 to 2038.\n",
			1900 + tm->tm_year);
		return -EINVAL;
	}
	rtc_tm_to_time(tm, &ticks);

	/* load 32-bit read-only counter */
	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
	data = (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 = (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 = (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_time_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 = (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 = (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_time_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 */
	rtc_tm_to_time(&alarm_tm, &ticks);
	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;
	struct rtc_time tm;
	unsigned long ticks = 0;
	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);

	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;
	}

	ret = pm80x_rtc_read_time(&pdev->dev, &tm);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to read initial time.\n");
		goto out_rtc;
	}
	if ((tm.tm_year < 70) || (tm.tm_year > 138)) {
		tm.tm_year = 70;
		tm.tm_mon = 0;
		tm.tm_mday = 1;
		tm.tm_hour = 0;
		tm.tm_min = 0;
		tm.tm_sec = 0;
		ret = pm80x_rtc_set_time(&pdev->dev, &tm);
		if (ret < 0) {
			dev_err(&pdev->dev, "Failed to set initial time.\n");
			goto out_rtc;
		}
	}
	rtc_tm_to_time(&tm, &ticks);

	info->rtc_dev = devm_rtc_device_register(&pdev->dev, "88pm80x-rtc",
					    &pm80x_rtc_ops, THIS_MODULE);
	if (IS_ERR(info->rtc_dev)) {
		ret = PTR_ERR(info->rtc_dev);
		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;
	55	struct delayed_work calib_work;
	56
	57	int irq;
	58	int vrtc;
	59	};
	60
	61	static irqreturn_t rtc_update_handler(int irq, void *data)
	62	{
	63	struct pm80x_rtc_info info = (struct pm80x_rtc_info )data;
	64	int mask;
65
66	mask = PM800_ALARM \| PM800_ALARM_WAKEUP;
67	regmap_update_bits(info->map, PM800_RTC_CONTROL, mask \| PM800_ALARM1_EN,
68	mask);
69	rtc_update_irq(info->rtc_dev, 1, RTC_AF);
70	return IRQ_HANDLED;
71	}
72
73	static int pm80x_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
74	{
75	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
76
77	if (enabled)
78	regmap_update_bits(info->map, PM800_RTC_CONTROL,
79	PM800_ALARM1_EN, PM800_ALARM1_EN);
80	else
81	regmap_update_bits(info->map, PM800_RTC_CONTROL,
82	PM800_ALARM1_EN, 0);
83	return 0;
84	}
85
86	/*
87	* Calculate the next alarm time given the requested alarm time mask
88	* and the current time.
89	*/
90	static void rtc_next_alarm_time(struct rtc_time next, struct rtc_time now,
91	struct rtc_time *alrm)
92	{
93	unsigned long next_time;
94	unsigned long now_time;
95
96	next->tm_year = now->tm_year;
97	next->tm_mon = now->tm_mon;
98	next->tm_mday = now->tm_mday;
99	next->tm_hour = alrm->tm_hour;
100	next->tm_min = alrm->tm_min;
101	next->tm_sec = alrm->tm_sec;
102
103	rtc_tm_to_time(now, &now_time);
104	rtc_tm_to_time(next, &next_time);
105
106	if (next_time < now_time) {
107	/* Advance one day */
108	next_time += 60 * 60 * 24;
109	rtc_time_to_tm(next_time, next);
110	}
111	}
112
113	static int pm80x_rtc_read_time(struct device dev, struct rtc_time tm)
114	{
115	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
116	unsigned char buf[4];
117	unsigned long ticks, base, data;
118	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
119	base = (buf[3] << 24) \| (buf[2] << 16) \| (buf[1] << 8) \| buf[0];
120	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
121
122	/* load 32-bit read-only counter */
123	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
124	data = (buf[3] << 24) \| (buf[2] << 16) \| (buf[1] << 8) \| buf[0];
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);
128	rtc_time_to_tm(ticks, tm);
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;
137	if ((tm->tm_year < 70) \|\| (tm->tm_year > 138)) {
138	dev_dbg(info->dev,
139	"Set time %d out of range. Please set time between 1970 to 2038.\n",
140	1900 + tm->tm_year);
141	return -EINVAL;
142	}
143	rtc_tm_to_time(tm, &ticks);
144
145	/* load 32-bit read-only counter */
146	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
147	data = (buf[3] << 24) \| (buf[2] << 16) \| (buf[1] << 8) \| buf[0];
148	base = ticks - data;
149	dev_dbg(info->dev, "set base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
150	base, data, ticks);
151	buf[0] = base & 0xFF;
152	buf[1] = (base >> 8) & 0xFF;
153	buf[2] = (base >> 16) & 0xFF;
154	buf[3] = (base >> 24) & 0xFF;
155	regmap_raw_write(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
156
157	return 0;
158	}
159
160	static int pm80x_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
161	{
162	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
163	unsigned char buf[4];
164	unsigned long ticks, base, data;
165	int ret;
166
167	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
168	base = (buf[3] << 24) \| (buf[2] << 16) \| (buf[1] << 8) \| buf[0];
169	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
170
171	regmap_raw_read(info->map, PM800_RTC_EXPIRE1_1, buf, 4);
172	data = (buf[3] << 24) \| (buf[2] << 16) \| (buf[1] << 8) \| buf[0];
173	ticks = base + data;
174	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
175	base, data, ticks);
176
177	rtc_time_to_tm(ticks, &alrm->time);
178	regmap_read(info->map, PM800_RTC_CONTROL, &ret);
179	alrm->enabled = (ret & PM800_ALARM1_EN) ? 1 : 0;
180	alrm->pending = (ret & (PM800_ALARM \| PM800_ALARM_WAKEUP)) ? 1 : 0;
181	return 0;
182	}
183
184	static int pm80x_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
185	{
186	struct pm80x_rtc_info *info = dev_get_drvdata(dev);
187	struct rtc_time now_tm, alarm_tm;
188	unsigned long ticks, base, data;
189	unsigned char buf[4];
190	int mask;
191
192	regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_ALARM1_EN, 0);
193
194	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
195	base = (buf[3] << 24) \| (buf[2] << 16) \| (buf[1] << 8) \| buf[0];
196	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
197
198	/* load 32-bit read-only counter */
199	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
200	data = (buf[3] << 24) \| (buf[2] << 16) \| (buf[1] << 8) \| buf[0];
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
205	rtc_time_to_tm(ticks, &now_tm);
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 */
209	rtc_tm_to_time(&alarm_tm, &ticks);
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	struct rtc_time tm;
	258	unsigned long ticks = 0;
	259	int ret;
	260
4ab82103 VH	261	if (!pdata && !node) {
	262	dev_err(&pdev->dev,
	263	"pm80x-rtc requires platform data or of_node\n");
	264	return -EINVAL;
	265	}
	266
	267	if (!pdata) {
	268	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	269	if (!pdata) {
	270	dev_err(&pdev->dev, "failed to allocate memory\n");
	271	return -ENOMEM;
	272	}
	273	}
2985c29c QZ	274
	275	info =
	276	devm_kzalloc(&pdev->dev, sizeof(struct pm80x_rtc_info), GFP_KERNEL);
	277	if (!info)
	278	return -ENOMEM;
	279	info->irq = platform_get_irq(pdev, 0);
	280	if (info->irq < 0) {
	281	dev_err(&pdev->dev, "No IRQ resource!\n");
	282	ret = -EINVAL;
	283	goto out;
	284	}
	285
	286	info->chip = chip;
	287	info->map = chip->regmap;
	288	if (!info->map) {
	289	dev_err(&pdev->dev, "no regmap!\n");
	290	ret = -EINVAL;
	291	goto out;
	292	}
	293
	294	info->dev = &pdev->dev;
	295	dev_set_drvdata(&pdev->dev, info);
	296
	297	ret = pm80x_request_irq(chip, info->irq, rtc_update_handler,
	298	IRQF_ONESHOT, "rtc", info);
	299	if (ret < 0) {
	300	dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
	301	info->irq, ret);
	302	goto out;
	303	}
	304
	305	ret = pm80x_rtc_read_time(&pdev->dev, &tm);
	306	if (ret < 0) {
	307	dev_err(&pdev->dev, "Failed to read initial time.\n");
	308	goto out_rtc;
	309	}
	310	if ((tm.tm_year < 70) \|\| (tm.tm_year > 138)) {
	311	tm.tm_year = 70;
	312	tm.tm_mon = 0;
	313	tm.tm_mday = 1;
	314	tm.tm_hour = 0;
	315	tm.tm_min = 0;
	316	tm.tm_sec = 0;
	317	ret = pm80x_rtc_set_time(&pdev->dev, &tm);
	318	if (ret < 0) {
	319	dev_err(&pdev->dev, "Failed to set initial time.\n");
	320	goto out_rtc;
	321	}
	322	}
	323	rtc_tm_to_time(&tm, &ticks);
	324
e3c89668	325	info->rtc_dev = devm_rtc_device_register(&pdev->dev, "88pm80x-rtc",
2985c29c	326	&pm80x_rtc_ops, THIS_MODULE);
2985c29c	327	if (IS_ERR(info->rtc_dev)) {
7ead5511	328	ret = PTR_ERR(info->rtc_dev);
2985c29c QZ	329	dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
	330	goto out_rtc;
	331	}
	332	/*
	333	* enable internal XO instead of internal 3.25MHz clock since it can
	334	* free running in PMIC power-down state.
	335	*/
	336	regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_RTC1_USE_XO,
	337	PM800_RTC1_USE_XO);
	338
4ab82103 VH	339	/* remember whether this power up is caused by PMIC RTC or not */
4ab82103 VH	340	info->rtc_dev->dev.platform_data = &pdata->rtc_wakeup;
2985c29c QZ	341
	342	device_init_wakeup(&pdev->dev, 1);
	343
	344	return 0;
	345	out_rtc:
	346	pm80x_free_irq(chip, info->irq, info);
	347	out:
2985c29c QZ	348	return ret;
	349	}
	350
5a167f45	351	static int pm80x_rtc_remove(struct platform_device *pdev)
2985c29c QZ	352	{
2985c29c QZ	353	struct pm80x_rtc_info *info = platform_get_drvdata(pdev);
2985c29c	354	pm80x_free_irq(info->chip, info->irq, info);
2985c29c QZ	355	return 0;
	356	}
	357
	358	static struct platform_driver pm80x_rtc_driver = {
	359	.driver = {
	360	.name = "88pm80x-rtc",
2985c29c QZ	361	.pm = &pm80x_rtc_pm_ops,
	362	},
	363	.probe = pm80x_rtc_probe,
5a167f45	364	.remove = pm80x_rtc_remove,
2985c29c QZ	365	};
	366
	367	module_platform_driver(pm80x_rtc_driver);
	368
	369	MODULE_LICENSE("GPL");
	370	MODULE_DESCRIPTION("Marvell 88PM80x RTC driver");
	371	MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
	372	MODULE_ALIAS("platform:88pm80x-rtc");