[linux-2.6-block.git] / drivers / rtc / rtc-da9052.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Real time clock driver for DA9052
 *
 * Copyright(c) 2012 Dialog Semiconductor Ltd.
 *
 * Author: Dajun Dajun Chen <dajun.chen@diasemi.com>
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <linux/err.h>
#include <linux/delay.h>

#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>

#define rtc_err(rtc, fmt, ...) \
		dev_err(rtc->da9052->dev, "%s: " fmt, __func__, ##__VA_ARGS__)

#define DA9052_GET_TIME_RETRIES 5

struct da9052_rtc {
	struct rtc_device *rtc;
	struct da9052 *da9052;
};

static int da9052_rtc_enable_alarm(struct da9052_rtc *rtc, bool enable)
{
	int ret;
	if (enable) {
		ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
				DA9052_ALARM_Y_ALARM_ON|DA9052_ALARM_Y_TICK_ON,
				DA9052_ALARM_Y_ALARM_ON);
		if (ret != 0)
			rtc_err(rtc, "Failed to enable ALM: %d\n", ret);
	} else {
		ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
			DA9052_ALARM_Y_ALARM_ON|DA9052_ALARM_Y_TICK_ON, 0);
		if (ret != 0)
			rtc_err(rtc, "Write error: %d\n", ret);
	}
	return ret;
}

static irqreturn_t da9052_rtc_irq(int irq, void *data)
{
	struct da9052_rtc *rtc = data;

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

	return IRQ_HANDLED;
}

static int da9052_read_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm)
{
	int ret;
	uint8_t v[2][5];
	int idx = 1;
	int timeout = DA9052_GET_TIME_RETRIES;

	ret = da9052_group_read(rtc->da9052, DA9052_ALARM_MI_REG, 5, &v[0][0]);
	if (ret) {
		rtc_err(rtc, "Failed to group read ALM: %d\n", ret);
		return ret;
	}

	do {
		ret = da9052_group_read(rtc->da9052,
					DA9052_ALARM_MI_REG, 5, &v[idx][0]);
		if (ret) {
			rtc_err(rtc, "Failed to group read ALM: %d\n", ret);
			return ret;
		}

		if (memcmp(&v[0][0], &v[1][0], 5) == 0) {
			rtc_tm->tm_year = (v[0][4] & DA9052_RTC_YEAR) + 100;
			rtc_tm->tm_mon  = (v[0][3] & DA9052_RTC_MONTH) - 1;
			rtc_tm->tm_mday = v[0][2] & DA9052_RTC_DAY;
			rtc_tm->tm_hour = v[0][1] & DA9052_RTC_HOUR;
			rtc_tm->tm_min  = v[0][0] & DA9052_RTC_MIN;
			rtc_tm->tm_sec = 0;

			ret = rtc_valid_tm(rtc_tm);
			return ret;
		}

		idx = (1-idx);
		msleep(20);

	} while (timeout--);

	rtc_err(rtc, "Timed out reading alarm time\n");

	return -EIO;
}

static int da9052_set_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm)
{
	struct da9052 *da9052 = rtc->da9052;
	unsigned long alm_time;
	int ret;
	uint8_t v[3];

	ret = rtc_tm_to_time(rtc_tm, &alm_time);
	if (ret != 0)
		return ret;

	if (rtc_tm->tm_sec > 0) {
		alm_time += 60 - rtc_tm->tm_sec;
		rtc_time_to_tm(alm_time, rtc_tm);
	}
	BUG_ON(rtc_tm->tm_sec); /* it will cause repeated irqs if not zero */

	rtc_tm->tm_year -= 100;
	rtc_tm->tm_mon += 1;

	ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG,
				DA9052_RTC_MIN, rtc_tm->tm_min);
	if (ret != 0) {
		rtc_err(rtc, "Failed to write ALRM MIN: %d\n", ret);
		return ret;
	}

	v[0] = rtc_tm->tm_hour;
	v[1] = rtc_tm->tm_mday;
	v[2] = rtc_tm->tm_mon;

	ret = da9052_group_write(da9052, DA9052_ALARM_H_REG, 3, v);
	if (ret < 0)
		return ret;

	ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
				DA9052_RTC_YEAR, rtc_tm->tm_year);
	if (ret != 0)
		rtc_err(rtc, "Failed to write ALRM YEAR: %d\n", ret);

	return ret;
}

static int da9052_rtc_get_alarm_status(struct da9052_rtc *rtc)
{
	int ret;

	ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_Y_REG);
	if (ret < 0) {
		rtc_err(rtc, "Failed to read ALM: %d\n", ret);
		return ret;
	}

	return !!(ret&DA9052_ALARM_Y_ALARM_ON);
}

static int da9052_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm)
{
	struct da9052_rtc *rtc = dev_get_drvdata(dev);
	int ret;
	uint8_t v[2][6];
	int idx = 1;
	int timeout = DA9052_GET_TIME_RETRIES;

	ret = da9052_group_read(rtc->da9052, DA9052_COUNT_S_REG, 6, &v[0][0]);
	if (ret) {
		rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
		return ret;
	}

	do {
		ret = da9052_group_read(rtc->da9052,
					DA9052_COUNT_S_REG, 6, &v[idx][0]);
		if (ret) {
			rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
			return ret;
		}

		if (memcmp(&v[0][0], &v[1][0], 6) == 0) {
			rtc_tm->tm_year = (v[0][5] & DA9052_RTC_YEAR) + 100;
			rtc_tm->tm_mon  = (v[0][4] & DA9052_RTC_MONTH) - 1;
			rtc_tm->tm_mday = v[0][3] & DA9052_RTC_DAY;
			rtc_tm->tm_hour = v[0][2] & DA9052_RTC_HOUR;
			rtc_tm->tm_min  = v[0][1] & DA9052_RTC_MIN;
			rtc_tm->tm_sec  = v[0][0] & DA9052_RTC_SEC;

			return 0;
		}

		idx = (1-idx);
		msleep(20);

	} while (timeout--);

	rtc_err(rtc, "Timed out reading time\n");

	return -EIO;
}

static int da9052_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
	struct da9052_rtc *rtc;
	uint8_t v[6];
	int ret;

	/* DA9052 only has 6 bits for year - to represent 2000-2063 */
	if ((tm->tm_year < 100) || (tm->tm_year > 163))
		return -EINVAL;

	rtc = dev_get_drvdata(dev);

	v[0] = tm->tm_sec;
	v[1] = tm->tm_min;
	v[2] = tm->tm_hour;
	v[3] = tm->tm_mday;
	v[4] = tm->tm_mon + 1;
	v[5] = tm->tm_year - 100;

	ret = da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v);
	if (ret < 0)
		rtc_err(rtc, "failed to set RTC time: %d\n", ret);
	return ret;
}

static int da9052_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	int ret;
	struct rtc_time *tm = &alrm->time;
	struct da9052_rtc *rtc = dev_get_drvdata(dev);

	ret = da9052_read_alarm(rtc, tm);
	if (ret < 0) {
		rtc_err(rtc, "failed to read RTC alarm: %d\n", ret);
		return ret;
	}

	alrm->enabled = da9052_rtc_get_alarm_status(rtc);
	return 0;
}

static int da9052_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	int ret;
	struct rtc_time *tm = &alrm->time;
	struct da9052_rtc *rtc = dev_get_drvdata(dev);

	/* DA9052 only has 6 bits for year - to represent 2000-2063 */
	if ((tm->tm_year < 100) || (tm->tm_year > 163))
		return -EINVAL;

	ret = da9052_rtc_enable_alarm(rtc, 0);
	if (ret < 0)
		return ret;

	ret = da9052_set_alarm(rtc, tm);
	if (ret < 0)
		return ret;

	ret = da9052_rtc_enable_alarm(rtc, 1);
	return ret;
}

static int da9052_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
	struct da9052_rtc *rtc = dev_get_drvdata(dev);

	return da9052_rtc_enable_alarm(rtc, enabled);
}

static const struct rtc_class_ops da9052_rtc_ops = {
	.read_time	= da9052_rtc_read_time,
	.set_time	= da9052_rtc_set_time,
	.read_alarm	= da9052_rtc_read_alarm,
	.set_alarm	= da9052_rtc_set_alarm,
	.alarm_irq_enable = da9052_rtc_alarm_irq_enable,
};

static int da9052_rtc_probe(struct platform_device *pdev)
{
	struct da9052_rtc *rtc;
	int ret;

	rtc = devm_kzalloc(&pdev->dev, sizeof(struct da9052_rtc), GFP_KERNEL);
	if (!rtc)
		return -ENOMEM;

	rtc->da9052 = dev_get_drvdata(pdev->dev.parent);
	platform_set_drvdata(pdev, rtc);

	ret = da9052_reg_write(rtc->da9052, DA9052_BBAT_CONT_REG, 0xFE);
	if (ret < 0) {
		rtc_err(rtc,
			"Failed to setup RTC battery charging: %d\n", ret);
		return ret;
	}

	ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
				DA9052_ALARM_Y_TICK_ON, 0);
	if (ret != 0)
		rtc_err(rtc, "Failed to disable TICKS: %d\n", ret);

	device_init_wakeup(&pdev->dev, true);
	rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
				       &da9052_rtc_ops, THIS_MODULE);

	if (IS_ERR(rtc->rtc))
		return PTR_ERR(rtc->rtc);

	ret = da9052_request_irq(rtc->da9052, DA9052_IRQ_ALARM, "ALM",
				da9052_rtc_irq, rtc);
	if (ret != 0) {
		rtc_err(rtc, "irq registration failed: %d\n", ret);
		return ret;
	}

	return 0;
}

static struct platform_driver da9052_rtc_driver = {
	.probe	= da9052_rtc_probe,
	.driver = {
		.name	= "da9052-rtc",
	},
};

module_platform_driver(da9052_rtc_driver);

MODULE_AUTHOR("Anthony Olech <Anthony.Olech@diasemi.com>");
MODULE_DESCRIPTION("RTC driver for Dialog DA9052 PMIC");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9052-rtc");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
fef931ff AJ	2	/*
	3	* Real time clock driver for DA9052
	4	*
	5	* Copyright(c) 2012 Dialog Semiconductor Ltd.
	6	*
	7	* Author: Dajun Dajun Chen <dajun.chen@diasemi.com>
fef931ff AJ	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/platform_device.h>
	12	#include <linux/rtc.h>
11f54d05	13	#include <linux/err.h>
03cc1625	14	#include <linux/delay.h>
fef931ff AJ	15
	16	#include <linux/mfd/da9052/da9052.h>
	17	#include <linux/mfd/da9052/reg.h>
	18
7c994c08 AO	19	#define rtc_err(rtc, fmt, ...) \
7c994c08 AO	20	dev_err(rtc->da9052->dev, "%s: " fmt, __func__, ##__VA_ARGS__)
fef931ff	21
03cc1625 AW	22	#define DA9052_GET_TIME_RETRIES 5
03cc1625 AW	23
fef931ff AJ	24	struct da9052_rtc {
	25	struct rtc_device *rtc;
	26	struct da9052 *da9052;
fef931ff AJ	27	};
fef931ff AJ	28
7c994c08	29	static int da9052_rtc_enable_alarm(struct da9052_rtc *rtc, bool enable)
fef931ff AJ	30	{
	31	int ret;
	32	if (enable) {
7c994c08 AO	33	ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
	34	DA9052_ALARM_Y_ALARM_ON\|DA9052_ALARM_Y_TICK_ON,
	35	DA9052_ALARM_Y_ALARM_ON);
fef931ff	36	if (ret != 0)
7c994c08	37	rtc_err(rtc, "Failed to enable ALM: %d\n", ret);
fef931ff	38	} else {
7c994c08 AO	39	ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
7c994c08 AO	40	DA9052_ALARM_Y_ALARM_ON\|DA9052_ALARM_Y_TICK_ON, 0);
fef931ff	41	if (ret != 0)
7c994c08	42	rtc_err(rtc, "Write error: %d\n", ret);
fef931ff AJ	43	}
	44	return ret;
	45	}
	46
	47	static irqreturn_t da9052_rtc_irq(int irq, void *data)
	48	{
	49	struct da9052_rtc *rtc = data;
fef931ff	50
7c994c08	51	rtc_update_irq(rtc->rtc, 1, RTC_IRQF \| RTC_AF);
fef931ff AJ	52
	53	return IRQ_HANDLED;
	54	}
	55
7c994c08	56	static int da9052_read_alarm(struct da9052_rtc rtc, struct rtc_time rtc_tm)
fef931ff AJ	57	{
fef931ff AJ	58	int ret;
03cc1625 AW	59	uint8_t v[2][5];
	60	int idx = 1;
	61	int timeout = DA9052_GET_TIME_RETRIES;
fef931ff	62
03cc1625 AW	63	ret = da9052_group_read(rtc->da9052, DA9052_ALARM_MI_REG, 5, &v[0][0]);
03cc1625 AW	64	if (ret) {
7c994c08	65	rtc_err(rtc, "Failed to group read ALM: %d\n", ret);
fef931ff AJ	66	return ret;
	67	}
	68
03cc1625 AW	69	do {
	70	ret = da9052_group_read(rtc->da9052,
	71	DA9052_ALARM_MI_REG, 5, &v[idx][0]);
	72	if (ret) {
	73	rtc_err(rtc, "Failed to group read ALM: %d\n", ret);
	74	return ret;
	75	}
fef931ff	76
03cc1625 AW	77	if (memcmp(&v[0][0], &v[1][0], 5) == 0) {
	78	rtc_tm->tm_year = (v[0][4] & DA9052_RTC_YEAR) + 100;
	79	rtc_tm->tm_mon = (v[0][3] & DA9052_RTC_MONTH) - 1;
	80	rtc_tm->tm_mday = v[0][2] & DA9052_RTC_DAY;
	81	rtc_tm->tm_hour = v[0][1] & DA9052_RTC_HOUR;
	82	rtc_tm->tm_min = v[0][0] & DA9052_RTC_MIN;
d2c92705	83	rtc_tm->tm_sec = 0;
03cc1625 AW	84
	85	ret = rtc_valid_tm(rtc_tm);
	86	return ret;
	87	}
	88
	89	idx = (1-idx);
	90	msleep(20);
	91
	92	} while (timeout--);
	93
	94	rtc_err(rtc, "Timed out reading alarm time\n");
	95
	96	return -EIO;
fef931ff AJ	97	}
fef931ff AJ	98
7c994c08	99	static int da9052_set_alarm(struct da9052_rtc rtc, struct rtc_time rtc_tm)
fef931ff	100	{
7c994c08 AO	101	struct da9052 *da9052 = rtc->da9052;
7c994c08 AO	102	unsigned long alm_time;
fef931ff AJ	103	int ret;
	104	uint8_t v[3];
	105
7c994c08 AO	106	ret = rtc_tm_to_time(rtc_tm, &alm_time);
	107	if (ret != 0)
	108	return ret;
	109
	110	if (rtc_tm->tm_sec > 0) {
	111	alm_time += 60 - rtc_tm->tm_sec;
	112	rtc_time_to_tm(alm_time, rtc_tm);
	113	}
	114	BUG_ON(rtc_tm->tm_sec); /* it will cause repeated irqs if not zero */
	115
fef931ff AJ	116	rtc_tm->tm_year -= 100;
	117	rtc_tm->tm_mon += 1;
	118
	119	ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG,
	120	DA9052_RTC_MIN, rtc_tm->tm_min);
	121	if (ret != 0) {
7c994c08	122	rtc_err(rtc, "Failed to write ALRM MIN: %d\n", ret);
fef931ff AJ	123	return ret;
	124	}
	125
	126	v[0] = rtc_tm->tm_hour;
	127	v[1] = rtc_tm->tm_mday;
	128	v[2] = rtc_tm->tm_mon;
	129
	130	ret = da9052_group_write(da9052, DA9052_ALARM_H_REG, 3, v);
	131	if (ret < 0)
	132	return ret;
	133
	134	ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
	135	DA9052_RTC_YEAR, rtc_tm->tm_year);
	136	if (ret != 0)
7c994c08	137	rtc_err(rtc, "Failed to write ALRM YEAR: %d\n", ret);
fef931ff AJ	138
	139	return ret;
	140	}
	141
7c994c08	142	static int da9052_rtc_get_alarm_status(struct da9052_rtc *rtc)
fef931ff AJ	143	{
	144	int ret;
	145
7c994c08	146	ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_Y_REG);
fef931ff	147	if (ret < 0) {
7c994c08	148	rtc_err(rtc, "Failed to read ALM: %d\n", ret);
fef931ff AJ	149	return ret;
fef931ff AJ	150	}
7c994c08 AO	151
7c994c08 AO	152	return !!(ret&DA9052_ALARM_Y_ALARM_ON);
fef931ff AJ	153	}
	154
	155	static int da9052_rtc_read_time(struct device dev, struct rtc_time rtc_tm)
	156	{
	157	struct da9052_rtc *rtc = dev_get_drvdata(dev);
fef931ff	158	int ret;
03cc1625 AW	159	uint8_t v[2][6];
	160	int idx = 1;
	161	int timeout = DA9052_GET_TIME_RETRIES;
fef931ff	162
03cc1625 AW	163	ret = da9052_group_read(rtc->da9052, DA9052_COUNT_S_REG, 6, &v[0][0]);
03cc1625 AW	164	if (ret) {
7c994c08	165	rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
fef931ff AJ	166	return ret;
	167	}
	168
03cc1625 AW	169	do {
	170	ret = da9052_group_read(rtc->da9052,
	171	DA9052_COUNT_S_REG, 6, &v[idx][0]);
	172	if (ret) {
	173	rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
	174	return ret;
	175	}
fef931ff	176
03cc1625 AW	177	if (memcmp(&v[0][0], &v[1][0], 6) == 0) {
	178	rtc_tm->tm_year = (v[0][5] & DA9052_RTC_YEAR) + 100;
	179	rtc_tm->tm_mon = (v[0][4] & DA9052_RTC_MONTH) - 1;
	180	rtc_tm->tm_mday = v[0][3] & DA9052_RTC_DAY;
	181	rtc_tm->tm_hour = v[0][2] & DA9052_RTC_HOUR;
	182	rtc_tm->tm_min = v[0][1] & DA9052_RTC_MIN;
	183	rtc_tm->tm_sec = v[0][0] & DA9052_RTC_SEC;
	184
bb54be13	185	return 0;
03cc1625 AW	186	}
	187
	188	idx = (1-idx);
	189	msleep(20);
	190
	191	} while (timeout--);
	192
	193	rtc_err(rtc, "Timed out reading time\n");
	194
	195	return -EIO;
fef931ff AJ	196	}
	197
	198	static int da9052_rtc_set_time(struct device dev, struct rtc_time tm)
	199	{
	200	struct da9052_rtc *rtc;
	201	uint8_t v[6];
7c994c08	202	int ret;
fef931ff	203
ae824c48 AW	204	/* DA9052 only has 6 bits for year - to represent 2000-2063 */
	205	if ((tm->tm_year < 100) \|\| (tm->tm_year > 163))
	206	return -EINVAL;
	207
fef931ff AJ	208	rtc = dev_get_drvdata(dev);
	209
	210	v[0] = tm->tm_sec;
	211	v[1] = tm->tm_min;
	212	v[2] = tm->tm_hour;
	213	v[3] = tm->tm_mday;
	214	v[4] = tm->tm_mon + 1;
	215	v[5] = tm->tm_year - 100;
	216
7c994c08 AO	217	ret = da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v);
	218	if (ret < 0)
	219	rtc_err(rtc, "failed to set RTC time: %d\n", ret);
	220	return ret;
fef931ff AJ	221	}
	222
	223	static int da9052_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
	224	{
	225	int ret;
	226	struct rtc_time *tm = &alrm->time;
	227	struct da9052_rtc *rtc = dev_get_drvdata(dev);
	228
7c994c08 AO	229	ret = da9052_read_alarm(rtc, tm);
	230	if (ret < 0) {
	231	rtc_err(rtc, "failed to read RTC alarm: %d\n", ret);
fef931ff	232	return ret;
7c994c08	233	}
fef931ff	234
7c994c08	235	alrm->enabled = da9052_rtc_get_alarm_status(rtc);
fef931ff AJ	236	return 0;
	237	}
	238
	239	static int da9052_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
	240	{
	241	int ret;
	242	struct rtc_time *tm = &alrm->time;
	243	struct da9052_rtc *rtc = dev_get_drvdata(dev);
	244
ae824c48 AW	245	/* DA9052 only has 6 bits for year - to represent 2000-2063 */
	246	if ((tm->tm_year < 100) \|\| (tm->tm_year > 163))
	247	return -EINVAL;
	248
7c994c08	249	ret = da9052_rtc_enable_alarm(rtc, 0);
fef931ff AJ	250	if (ret < 0)
	251	return ret;
	252
7c994c08 AO	253	ret = da9052_set_alarm(rtc, tm);
7c994c08 AO	254	if (ret < 0)
fef931ff AJ	255	return ret;
fef931ff AJ	256
7c994c08	257	ret = da9052_rtc_enable_alarm(rtc, 1);
fef931ff AJ	258	return ret;
	259	}
	260
	261	static int da9052_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
	262	{
	263	struct da9052_rtc *rtc = dev_get_drvdata(dev);
	264
7c994c08	265	return da9052_rtc_enable_alarm(rtc, enabled);
fef931ff AJ	266	}
	267
	268	static const struct rtc_class_ops da9052_rtc_ops = {
	269	.read_time = da9052_rtc_read_time,
	270	.set_time = da9052_rtc_set_time,
	271	.read_alarm = da9052_rtc_read_alarm,
	272	.set_alarm = da9052_rtc_set_alarm,
	273	.alarm_irq_enable = da9052_rtc_alarm_irq_enable,
	274	};
	275
5a167f45	276	static int da9052_rtc_probe(struct platform_device *pdev)
fef931ff AJ	277	{
	278	struct da9052_rtc *rtc;
	279	int ret;
	280
	281	rtc = devm_kzalloc(&pdev->dev, sizeof(struct da9052_rtc), GFP_KERNEL);
	282	if (!rtc)
	283	return -ENOMEM;
	284
	285	rtc->da9052 = dev_get_drvdata(pdev->dev.parent);
	286	platform_set_drvdata(pdev, rtc);
7c994c08 AO	287
	288	ret = da9052_reg_write(rtc->da9052, DA9052_BBAT_CONT_REG, 0xFE);
	289	if (ret < 0) {
	290	rtc_err(rtc,
	291	"Failed to setup RTC battery charging: %d\n", ret);
	292	return ret;
	293	}
	294
	295	ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
	296	DA9052_ALARM_Y_TICK_ON, 0);
	297	if (ret != 0)
	298	rtc_err(rtc, "Failed to disable TICKS: %d\n", ret);
	299
6406d96e ST	300	device_init_wakeup(&pdev->dev, true);
	301	rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
	302	&da9052_rtc_ops, THIS_MODULE);
	303
	304	if (IS_ERR(rtc->rtc))
	305	return PTR_ERR(rtc->rtc);
	306
c2c0eed7	307	ret = da9052_request_irq(rtc->da9052, DA9052_IRQ_ALARM, "ALM",
925e8ea6	308	da9052_rtc_irq, rtc);
fef931ff	309	if (ret != 0) {
7c994c08	310	rtc_err(rtc, "irq registration failed: %d\n", ret);
007def04	311	return ret;
fef931ff AJ	312	}
fef931ff AJ	313
6406d96e	314	return 0;
fef931ff AJ	315	}
fef931ff AJ	316
fef931ff AJ	317	static struct platform_driver da9052_rtc_driver = {
fef931ff AJ	318	.probe = da9052_rtc_probe,
fef931ff AJ	319	.driver = {
fef931ff AJ	320	.name = "da9052-rtc",
fef931ff AJ	321	},
	322	};
	323
	324	module_platform_driver(da9052_rtc_driver);
	325
7c994c08	326	MODULE_AUTHOR("Anthony Olech <Anthony.Olech@diasemi.com>");
fef931ff AJ	327	MODULE_DESCRIPTION("RTC driver for Dialog DA9052 PMIC");
	328	MODULE_LICENSE("GPL");
	329	MODULE_ALIAS("platform:da9052-rtc");