[linux-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];

	alm_time = rtc_tm_to_time64(rtc_tm);

	if (rtc_tm->tm_sec > 0) {
		alm_time += 60 - rtc_tm->tm_sec;
		rtc_time64_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_allocate_device(&pdev->dev);
	if (IS_ERR(rtc->rtc))
		return PTR_ERR(rtc->rtc);

	rtc->rtc->ops = &da9052_rtc_ops;
	rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
	rtc->rtc->range_max = RTC_TIMESTAMP_END_2063;

	ret = devm_rtc_register_device(rtc->rtc);
	if (ret)
		return ret;

	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
06c4e103	106	alm_time = rtc_tm_to_time64(rtc_tm);
7c994c08 AO	107
	108	if (rtc_tm->tm_sec > 0) {
	109	alm_time += 60 - rtc_tm->tm_sec;
06c4e103	110	rtc_time64_to_tm(alm_time, rtc_tm);
7c994c08 AO	111	}
	112	BUG_ON(rtc_tm->tm_sec); /* it will cause repeated irqs if not zero */
	113
fef931ff AJ	114	rtc_tm->tm_year -= 100;
	115	rtc_tm->tm_mon += 1;
	116
	117	ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG,
	118	DA9052_RTC_MIN, rtc_tm->tm_min);
	119	if (ret != 0) {
7c994c08	120	rtc_err(rtc, "Failed to write ALRM MIN: %d\n", ret);
fef931ff AJ	121	return ret;
	122	}
	123
	124	v[0] = rtc_tm->tm_hour;
	125	v[1] = rtc_tm->tm_mday;
	126	v[2] = rtc_tm->tm_mon;
	127
	128	ret = da9052_group_write(da9052, DA9052_ALARM_H_REG, 3, v);
	129	if (ret < 0)
	130	return ret;
	131
	132	ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
	133	DA9052_RTC_YEAR, rtc_tm->tm_year);
	134	if (ret != 0)
7c994c08	135	rtc_err(rtc, "Failed to write ALRM YEAR: %d\n", ret);
fef931ff AJ	136
	137	return ret;
	138	}
	139
7c994c08	140	static int da9052_rtc_get_alarm_status(struct da9052_rtc *rtc)
fef931ff AJ	141	{
	142	int ret;
	143
7c994c08	144	ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_Y_REG);
fef931ff	145	if (ret < 0) {
7c994c08	146	rtc_err(rtc, "Failed to read ALM: %d\n", ret);
fef931ff AJ	147	return ret;
fef931ff AJ	148	}
7c994c08 AO	149
7c994c08 AO	150	return !!(ret&DA9052_ALARM_Y_ALARM_ON);
fef931ff AJ	151	}
	152
	153	static int da9052_rtc_read_time(struct device dev, struct rtc_time rtc_tm)
	154	{
	155	struct da9052_rtc *rtc = dev_get_drvdata(dev);
fef931ff	156	int ret;
03cc1625 AW	157	uint8_t v[2][6];
	158	int idx = 1;
	159	int timeout = DA9052_GET_TIME_RETRIES;
fef931ff	160
03cc1625 AW	161	ret = da9052_group_read(rtc->da9052, DA9052_COUNT_S_REG, 6, &v[0][0]);
03cc1625 AW	162	if (ret) {
7c994c08	163	rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
fef931ff AJ	164	return ret;
	165	}
	166
03cc1625 AW	167	do {
	168	ret = da9052_group_read(rtc->da9052,
	169	DA9052_COUNT_S_REG, 6, &v[idx][0]);
	170	if (ret) {
	171	rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
	172	return ret;
	173	}
fef931ff	174
03cc1625 AW	175	if (memcmp(&v[0][0], &v[1][0], 6) == 0) {
	176	rtc_tm->tm_year = (v[0][5] & DA9052_RTC_YEAR) + 100;
	177	rtc_tm->tm_mon = (v[0][4] & DA9052_RTC_MONTH) - 1;
	178	rtc_tm->tm_mday = v[0][3] & DA9052_RTC_DAY;
	179	rtc_tm->tm_hour = v[0][2] & DA9052_RTC_HOUR;
	180	rtc_tm->tm_min = v[0][1] & DA9052_RTC_MIN;
	181	rtc_tm->tm_sec = v[0][0] & DA9052_RTC_SEC;
	182
bb54be13	183	return 0;
03cc1625 AW	184	}
	185
	186	idx = (1-idx);
	187	msleep(20);
	188
	189	} while (timeout--);
	190
	191	rtc_err(rtc, "Timed out reading time\n");
	192
	193	return -EIO;
fef931ff AJ	194	}
	195
	196	static int da9052_rtc_set_time(struct device dev, struct rtc_time tm)
	197	{
	198	struct da9052_rtc *rtc;
	199	uint8_t v[6];
7c994c08	200	int ret;
fef931ff	201
ae824c48 AW	202	/* DA9052 only has 6 bits for year - to represent 2000-2063 */
	203	if ((tm->tm_year < 100) \|\| (tm->tm_year > 163))
	204	return -EINVAL;
	205
fef931ff AJ	206	rtc = dev_get_drvdata(dev);
	207
	208	v[0] = tm->tm_sec;
	209	v[1] = tm->tm_min;
	210	v[2] = tm->tm_hour;
	211	v[3] = tm->tm_mday;
	212	v[4] = tm->tm_mon + 1;
	213	v[5] = tm->tm_year - 100;
	214
7c994c08 AO	215	ret = da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v);
	216	if (ret < 0)
	217	rtc_err(rtc, "failed to set RTC time: %d\n", ret);
	218	return ret;
fef931ff AJ	219	}
	220
	221	static int da9052_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
	222	{
	223	int ret;
	224	struct rtc_time *tm = &alrm->time;
	225	struct da9052_rtc *rtc = dev_get_drvdata(dev);
	226
7c994c08 AO	227	ret = da9052_read_alarm(rtc, tm);
	228	if (ret < 0) {
	229	rtc_err(rtc, "failed to read RTC alarm: %d\n", ret);
fef931ff	230	return ret;
7c994c08	231	}
fef931ff	232
7c994c08	233	alrm->enabled = da9052_rtc_get_alarm_status(rtc);
fef931ff AJ	234	return 0;
	235	}
	236
	237	static int da9052_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
	238	{
	239	int ret;
	240	struct rtc_time *tm = &alrm->time;
	241	struct da9052_rtc *rtc = dev_get_drvdata(dev);
	242
ae824c48 AW	243	/* DA9052 only has 6 bits for year - to represent 2000-2063 */
	244	if ((tm->tm_year < 100) \|\| (tm->tm_year > 163))
	245	return -EINVAL;
	246
7c994c08	247	ret = da9052_rtc_enable_alarm(rtc, 0);
fef931ff AJ	248	if (ret < 0)
	249	return ret;
	250
7c994c08 AO	251	ret = da9052_set_alarm(rtc, tm);
7c994c08 AO	252	if (ret < 0)
fef931ff AJ	253	return ret;
fef931ff AJ	254
7c994c08	255	ret = da9052_rtc_enable_alarm(rtc, 1);
fef931ff AJ	256	return ret;
	257	}
	258
	259	static int da9052_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
	260	{
	261	struct da9052_rtc *rtc = dev_get_drvdata(dev);
	262
7c994c08	263	return da9052_rtc_enable_alarm(rtc, enabled);
fef931ff AJ	264	}
	265
	266	static const struct rtc_class_ops da9052_rtc_ops = {
	267	.read_time = da9052_rtc_read_time,
	268	.set_time = da9052_rtc_set_time,
	269	.read_alarm = da9052_rtc_read_alarm,
	270	.set_alarm = da9052_rtc_set_alarm,
	271	.alarm_irq_enable = da9052_rtc_alarm_irq_enable,
	272	};
	273
5a167f45	274	static int da9052_rtc_probe(struct platform_device *pdev)
fef931ff AJ	275	{
	276	struct da9052_rtc *rtc;
	277	int ret;
	278
	279	rtc = devm_kzalloc(&pdev->dev, sizeof(struct da9052_rtc), GFP_KERNEL);
	280	if (!rtc)
	281	return -ENOMEM;
	282
	283	rtc->da9052 = dev_get_drvdata(pdev->dev.parent);
	284	platform_set_drvdata(pdev, rtc);
7c994c08 AO	285
	286	ret = da9052_reg_write(rtc->da9052, DA9052_BBAT_CONT_REG, 0xFE);
	287	if (ret < 0) {
	288	rtc_err(rtc,
	289	"Failed to setup RTC battery charging: %d\n", ret);
	290	return ret;
	291	}
	292
	293	ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
	294	DA9052_ALARM_Y_TICK_ON, 0);
	295	if (ret != 0)
	296	rtc_err(rtc, "Failed to disable TICKS: %d\n", ret);
	297
6406d96e	298	device_init_wakeup(&pdev->dev, true);
d17077e5	299	rtc->rtc = devm_rtc_allocate_device(&pdev->dev);
6406d96e ST	300	if (IS_ERR(rtc->rtc))
	301	return PTR_ERR(rtc->rtc);
	302
d17077e5	303	rtc->rtc->ops = &da9052_rtc_ops;
23af616c AB	304	rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
23af616c AB	305	rtc->rtc->range_max = RTC_TIMESTAMP_END_2063;
d17077e5	306
fdcfd854	307	ret = devm_rtc_register_device(rtc->rtc);
d17077e5 AB	308	if (ret)
	309	return ret;
	310
c2c0eed7	311	ret = da9052_request_irq(rtc->da9052, DA9052_IRQ_ALARM, "ALM",
925e8ea6	312	da9052_rtc_irq, rtc);
fef931ff	313	if (ret != 0) {
7c994c08	314	rtc_err(rtc, "irq registration failed: %d\n", ret);
007def04	315	return ret;
fef931ff AJ	316	}
fef931ff AJ	317
6406d96e	318	return 0;
fef931ff AJ	319	}
fef931ff AJ	320
fef931ff AJ	321	static struct platform_driver da9052_rtc_driver = {
fef931ff AJ	322	.probe = da9052_rtc_probe,
fef931ff AJ	323	.driver = {
fef931ff AJ	324	.name = "da9052-rtc",
fef931ff AJ	325	},
	326	};
	327
	328	module_platform_driver(da9052_rtc_driver);
	329
7c994c08	330	MODULE_AUTHOR("Anthony Olech <Anthony.Olech@diasemi.com>");
fef931ff AJ	331	MODULE_DESCRIPTION("RTC driver for Dialog DA9052 PMIC");
	332	MODULE_LICENSE("GPL");
	333	MODULE_ALIAS("platform:da9052-rtc");