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

/*
 * Real time clock driver for DA9052
 *
 * Copyright(c) 2012 Dialog Semiconductor Ltd.
 *
 * Author: Dajun Dajun Chen <dajun.chen@diasemi.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */

#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;

			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;

			ret = rtc_valid_tm(rtc_tm);
			return ret;
		}

		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
fef931ff AJ	1	/*
	2	* Real time clock driver for DA9052
	3	*
	4	* Copyright(c) 2012 Dialog Semiconductor Ltd.
	5	*
	6	* Author: Dajun Dajun Chen <dajun.chen@diasemi.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/rtc.h>
11f54d05	18	#include <linux/err.h>
03cc1625	19	#include <linux/delay.h>
fef931ff AJ	20
	21	#include <linux/mfd/da9052/da9052.h>
	22	#include <linux/mfd/da9052/reg.h>
	23
7c994c08 AO	24	#define rtc_err(rtc, fmt, ...) \
7c994c08 AO	25	dev_err(rtc->da9052->dev, "%s: " fmt, __func__, ##__VA_ARGS__)
fef931ff	26
03cc1625 AW	27	#define DA9052_GET_TIME_RETRIES 5
03cc1625 AW	28
fef931ff AJ	29	struct da9052_rtc {
	30	struct rtc_device *rtc;
	31	struct da9052 *da9052;
fef931ff AJ	32	};
fef931ff AJ	33
7c994c08	34	static int da9052_rtc_enable_alarm(struct da9052_rtc *rtc, bool enable)
fef931ff AJ	35	{
	36	int ret;
	37	if (enable) {
7c994c08 AO	38	ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
	39	DA9052_ALARM_Y_ALARM_ON\|DA9052_ALARM_Y_TICK_ON,
	40	DA9052_ALARM_Y_ALARM_ON);
fef931ff	41	if (ret != 0)
7c994c08	42	rtc_err(rtc, "Failed to enable ALM: %d\n", ret);
fef931ff	43	} else {
7c994c08 AO	44	ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
7c994c08 AO	45	DA9052_ALARM_Y_ALARM_ON\|DA9052_ALARM_Y_TICK_ON, 0);
fef931ff	46	if (ret != 0)
7c994c08	47	rtc_err(rtc, "Write error: %d\n", ret);
fef931ff AJ	48	}
	49	return ret;
	50	}
	51
	52	static irqreturn_t da9052_rtc_irq(int irq, void *data)
	53	{
	54	struct da9052_rtc *rtc = data;
fef931ff	55
7c994c08	56	rtc_update_irq(rtc->rtc, 1, RTC_IRQF \| RTC_AF);
fef931ff AJ	57
	58	return IRQ_HANDLED;
	59	}
	60
7c994c08	61	static int da9052_read_alarm(struct da9052_rtc rtc, struct rtc_time rtc_tm)
fef931ff AJ	62	{
fef931ff AJ	63	int ret;
03cc1625 AW	64	uint8_t v[2][5];
	65	int idx = 1;
	66	int timeout = DA9052_GET_TIME_RETRIES;
fef931ff	67
03cc1625 AW	68	ret = da9052_group_read(rtc->da9052, DA9052_ALARM_MI_REG, 5, &v[0][0]);
03cc1625 AW	69	if (ret) {
7c994c08	70	rtc_err(rtc, "Failed to group read ALM: %d\n", ret);
fef931ff AJ	71	return ret;
	72	}
	73
03cc1625 AW	74	do {
	75	ret = da9052_group_read(rtc->da9052,
	76	DA9052_ALARM_MI_REG, 5, &v[idx][0]);
	77	if (ret) {
	78	rtc_err(rtc, "Failed to group read ALM: %d\n", ret);
	79	return ret;
	80	}
fef931ff	81
03cc1625 AW	82	if (memcmp(&v[0][0], &v[1][0], 5) == 0) {
	83	rtc_tm->tm_year = (v[0][4] & DA9052_RTC_YEAR) + 100;
	84	rtc_tm->tm_mon = (v[0][3] & DA9052_RTC_MONTH) - 1;
	85	rtc_tm->tm_mday = v[0][2] & DA9052_RTC_DAY;
	86	rtc_tm->tm_hour = v[0][1] & DA9052_RTC_HOUR;
	87	rtc_tm->tm_min = v[0][0] & DA9052_RTC_MIN;
	88
	89	ret = rtc_valid_tm(rtc_tm);
	90	return ret;
	91	}
	92
	93	idx = (1-idx);
	94	msleep(20);
	95
	96	} while (timeout--);
	97
	98	rtc_err(rtc, "Timed out reading alarm time\n");
	99
	100	return -EIO;
fef931ff AJ	101	}
fef931ff AJ	102
7c994c08	103	static int da9052_set_alarm(struct da9052_rtc rtc, struct rtc_time rtc_tm)
fef931ff	104	{
7c994c08 AO	105	struct da9052 *da9052 = rtc->da9052;
7c994c08 AO	106	unsigned long alm_time;
fef931ff AJ	107	int ret;
	108	uint8_t v[3];
	109
7c994c08 AO	110	ret = rtc_tm_to_time(rtc_tm, &alm_time);
	111	if (ret != 0)
	112	return ret;
	113
	114	if (rtc_tm->tm_sec > 0) {
	115	alm_time += 60 - rtc_tm->tm_sec;
	116	rtc_time_to_tm(alm_time, rtc_tm);
	117	}
	118	BUG_ON(rtc_tm->tm_sec); /* it will cause repeated irqs if not zero */
	119
fef931ff AJ	120	rtc_tm->tm_year -= 100;
	121	rtc_tm->tm_mon += 1;
	122
	123	ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG,
	124	DA9052_RTC_MIN, rtc_tm->tm_min);
	125	if (ret != 0) {
7c994c08	126	rtc_err(rtc, "Failed to write ALRM MIN: %d\n", ret);
fef931ff AJ	127	return ret;
	128	}
	129
	130	v[0] = rtc_tm->tm_hour;
	131	v[1] = rtc_tm->tm_mday;
	132	v[2] = rtc_tm->tm_mon;
	133
	134	ret = da9052_group_write(da9052, DA9052_ALARM_H_REG, 3, v);
	135	if (ret < 0)
	136	return ret;
	137
	138	ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
	139	DA9052_RTC_YEAR, rtc_tm->tm_year);
	140	if (ret != 0)
7c994c08	141	rtc_err(rtc, "Failed to write ALRM YEAR: %d\n", ret);
fef931ff AJ	142
	143	return ret;
	144	}
	145
7c994c08	146	static int da9052_rtc_get_alarm_status(struct da9052_rtc *rtc)
fef931ff AJ	147	{
	148	int ret;
	149
7c994c08	150	ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_Y_REG);
fef931ff	151	if (ret < 0) {
7c994c08	152	rtc_err(rtc, "Failed to read ALM: %d\n", ret);
fef931ff AJ	153	return ret;
fef931ff AJ	154	}
7c994c08 AO	155
7c994c08 AO	156	return !!(ret&DA9052_ALARM_Y_ALARM_ON);
fef931ff AJ	157	}
	158
	159	static int da9052_rtc_read_time(struct device dev, struct rtc_time rtc_tm)
	160	{
	161	struct da9052_rtc *rtc = dev_get_drvdata(dev);
fef931ff	162	int ret;
03cc1625 AW	163	uint8_t v[2][6];
	164	int idx = 1;
	165	int timeout = DA9052_GET_TIME_RETRIES;
fef931ff	166
03cc1625 AW	167	ret = da9052_group_read(rtc->da9052, DA9052_COUNT_S_REG, 6, &v[0][0]);
03cc1625 AW	168	if (ret) {
7c994c08	169	rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
fef931ff AJ	170	return ret;
	171	}
	172
03cc1625 AW	173	do {
	174	ret = da9052_group_read(rtc->da9052,
	175	DA9052_COUNT_S_REG, 6, &v[idx][0]);
	176	if (ret) {
	177	rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
	178	return ret;
	179	}
fef931ff	180
03cc1625 AW	181	if (memcmp(&v[0][0], &v[1][0], 6) == 0) {
	182	rtc_tm->tm_year = (v[0][5] & DA9052_RTC_YEAR) + 100;
	183	rtc_tm->tm_mon = (v[0][4] & DA9052_RTC_MONTH) - 1;
	184	rtc_tm->tm_mday = v[0][3] & DA9052_RTC_DAY;
	185	rtc_tm->tm_hour = v[0][2] & DA9052_RTC_HOUR;
	186	rtc_tm->tm_min = v[0][1] & DA9052_RTC_MIN;
	187	rtc_tm->tm_sec = v[0][0] & DA9052_RTC_SEC;
	188
	189	ret = rtc_valid_tm(rtc_tm);
	190	return ret;
	191	}
	192
	193	idx = (1-idx);
	194	msleep(20);
	195
	196	} while (timeout--);
	197
	198	rtc_err(rtc, "Timed out reading time\n");
	199
	200	return -EIO;
fef931ff AJ	201	}
	202
	203	static int da9052_rtc_set_time(struct device dev, struct rtc_time tm)
	204	{
	205	struct da9052_rtc *rtc;
	206	uint8_t v[6];
7c994c08	207	int ret;
fef931ff	208
ae824c48 AW	209	/* DA9052 only has 6 bits for year - to represent 2000-2063 */
	210	if ((tm->tm_year < 100) \|\| (tm->tm_year > 163))
	211	return -EINVAL;
	212
fef931ff AJ	213	rtc = dev_get_drvdata(dev);
	214
	215	v[0] = tm->tm_sec;
	216	v[1] = tm->tm_min;
	217	v[2] = tm->tm_hour;
	218	v[3] = tm->tm_mday;
	219	v[4] = tm->tm_mon + 1;
	220	v[5] = tm->tm_year - 100;
	221
7c994c08 AO	222	ret = da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v);
	223	if (ret < 0)
	224	rtc_err(rtc, "failed to set RTC time: %d\n", ret);
	225	return ret;
fef931ff AJ	226	}
	227
	228	static int da9052_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
	229	{
	230	int ret;
	231	struct rtc_time *tm = &alrm->time;
	232	struct da9052_rtc *rtc = dev_get_drvdata(dev);
	233
7c994c08 AO	234	ret = da9052_read_alarm(rtc, tm);
	235	if (ret < 0) {
	236	rtc_err(rtc, "failed to read RTC alarm: %d\n", ret);
fef931ff	237	return ret;
7c994c08	238	}
fef931ff	239
7c994c08	240	alrm->enabled = da9052_rtc_get_alarm_status(rtc);
fef931ff AJ	241	return 0;
	242	}
	243
	244	static int da9052_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
	245	{
	246	int ret;
	247	struct rtc_time *tm = &alrm->time;
	248	struct da9052_rtc *rtc = dev_get_drvdata(dev);
	249
ae824c48 AW	250	/* DA9052 only has 6 bits for year - to represent 2000-2063 */
	251	if ((tm->tm_year < 100) \|\| (tm->tm_year > 163))
	252	return -EINVAL;
	253
7c994c08	254	ret = da9052_rtc_enable_alarm(rtc, 0);
fef931ff AJ	255	if (ret < 0)
	256	return ret;
	257
7c994c08 AO	258	ret = da9052_set_alarm(rtc, tm);
7c994c08 AO	259	if (ret < 0)
fef931ff AJ	260	return ret;
fef931ff AJ	261
7c994c08	262	ret = da9052_rtc_enable_alarm(rtc, 1);
fef931ff AJ	263	return ret;
	264	}
	265
	266	static int da9052_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
	267	{
	268	struct da9052_rtc *rtc = dev_get_drvdata(dev);
	269
7c994c08	270	return da9052_rtc_enable_alarm(rtc, enabled);
fef931ff AJ	271	}
	272
	273	static const struct rtc_class_ops da9052_rtc_ops = {
	274	.read_time = da9052_rtc_read_time,
	275	.set_time = da9052_rtc_set_time,
	276	.read_alarm = da9052_rtc_read_alarm,
	277	.set_alarm = da9052_rtc_set_alarm,
	278	.alarm_irq_enable = da9052_rtc_alarm_irq_enable,
	279	};
	280
5a167f45	281	static int da9052_rtc_probe(struct platform_device *pdev)
fef931ff AJ	282	{
	283	struct da9052_rtc *rtc;
	284	int ret;
	285
	286	rtc = devm_kzalloc(&pdev->dev, sizeof(struct da9052_rtc), GFP_KERNEL);
	287	if (!rtc)
	288	return -ENOMEM;
	289
	290	rtc->da9052 = dev_get_drvdata(pdev->dev.parent);
	291	platform_set_drvdata(pdev, rtc);
7c994c08 AO	292
	293	ret = da9052_reg_write(rtc->da9052, DA9052_BBAT_CONT_REG, 0xFE);
	294	if (ret < 0) {
	295	rtc_err(rtc,
	296	"Failed to setup RTC battery charging: %d\n", ret);
	297	return ret;
	298	}
	299
	300	ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
	301	DA9052_ALARM_Y_TICK_ON, 0);
	302	if (ret != 0)
	303	rtc_err(rtc, "Failed to disable TICKS: %d\n", ret);
	304
6406d96e ST	305	device_init_wakeup(&pdev->dev, true);
	306	rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
	307	&da9052_rtc_ops, THIS_MODULE);
	308
	309	if (IS_ERR(rtc->rtc))
	310	return PTR_ERR(rtc->rtc);
	311
c2c0eed7	312	ret = da9052_request_irq(rtc->da9052, DA9052_IRQ_ALARM, "ALM",
925e8ea6	313	da9052_rtc_irq, rtc);
fef931ff	314	if (ret != 0) {
7c994c08	315	rtc_err(rtc, "irq registration failed: %d\n", ret);
007def04	316	return ret;
fef931ff AJ	317	}
fef931ff AJ	318
6406d96e	319	return 0;
fef931ff AJ	320	}
fef931ff AJ	321
fef931ff AJ	322	static struct platform_driver da9052_rtc_driver = {
fef931ff AJ	323	.probe = da9052_rtc_probe,
fef931ff AJ	324	.driver = {
fef931ff AJ	325	.name = "da9052-rtc",
fef931ff AJ	326	},
	327	};
	328
	329	module_platform_driver(da9052_rtc_driver);
	330
7c994c08	331	MODULE_AUTHOR("Anthony Olech <Anthony.Olech@diasemi.com>");
fef931ff AJ	332	MODULE_DESCRIPTION("RTC driver for Dialog DA9052 PMIC");
	333	MODULE_LICENSE("GPL");
	334	MODULE_ALIAS("platform:da9052-rtc");