[linux.git] / drivers / rtc / rtc-da9063.c

/* rtc-da9063.c - Real time clock device driver for DA9063
 * Copyright (C) 2013-14  Dialog Semiconductor Ltd.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/rtc.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/regmap.h>
#include <linux/mfd/da9063/registers.h>
#include <linux/mfd/da9063/core.h>

#define YEARS_TO_DA9063(year)		((year) - 100)
#define MONTHS_TO_DA9063(month)		((month) + 1)
#define YEARS_FROM_DA9063(year)		((year) + 100)
#define MONTHS_FROM_DA9063(month)	((month) - 1)

#define RTC_DATA_LEN	(DA9063_REG_COUNT_Y - DA9063_REG_COUNT_S + 1)
#define RTC_SEC		0
#define RTC_MIN		1
#define RTC_HOUR	2
#define RTC_DAY		3
#define RTC_MONTH	4
#define RTC_YEAR	5

struct da9063_rtc {
	struct rtc_device	*rtc_dev;
	struct da9063		*hw;
	struct rtc_time		alarm_time;
	bool			rtc_sync;
};

static void da9063_data_to_tm(u8 *data, struct rtc_time *tm)
{
	tm->tm_sec  = data[RTC_SEC]  & DA9063_COUNT_SEC_MASK;
	tm->tm_min  = data[RTC_MIN]  & DA9063_COUNT_MIN_MASK;
	tm->tm_hour = data[RTC_HOUR] & DA9063_COUNT_HOUR_MASK;
	tm->tm_mday = data[RTC_DAY]  & DA9063_COUNT_DAY_MASK;
	tm->tm_mon  = MONTHS_FROM_DA9063(data[RTC_MONTH] &
					 DA9063_COUNT_MONTH_MASK);
	tm->tm_year = YEARS_FROM_DA9063(data[RTC_YEAR] &
					DA9063_COUNT_YEAR_MASK);
}

static void da9063_tm_to_data(struct rtc_time *tm, u8 *data)
{
	data[RTC_SEC] &= ~DA9063_COUNT_SEC_MASK;
	data[RTC_SEC] |= tm->tm_sec & DA9063_COUNT_SEC_MASK;

	data[RTC_MIN] &= ~DA9063_COUNT_MIN_MASK;
	data[RTC_MIN] |= tm->tm_min & DA9063_COUNT_MIN_MASK;

	data[RTC_HOUR] &= ~DA9063_COUNT_HOUR_MASK;
	data[RTC_HOUR] |= tm->tm_hour & DA9063_COUNT_HOUR_MASK;

	data[RTC_DAY] &= ~DA9063_COUNT_DAY_MASK;
	data[RTC_DAY] |= tm->tm_mday & DA9063_COUNT_DAY_MASK;

	data[RTC_MONTH] &= ~DA9063_COUNT_MONTH_MASK;
	data[RTC_MONTH] |= MONTHS_TO_DA9063(tm->tm_mon) &
				DA9063_COUNT_MONTH_MASK;

	data[RTC_YEAR] &= ~DA9063_COUNT_YEAR_MASK;
	data[RTC_YEAR] |= YEARS_TO_DA9063(tm->tm_year) &
				DA9063_COUNT_YEAR_MASK;
}

static int da9063_rtc_stop_alarm(struct device *dev)
{
	struct da9063_rtc *rtc = dev_get_drvdata(dev);

	return regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y,
				  DA9063_ALARM_ON, 0);
}

static int da9063_rtc_start_alarm(struct device *dev)
{
	struct da9063_rtc *rtc = dev_get_drvdata(dev);

	return regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y,
				  DA9063_ALARM_ON, DA9063_ALARM_ON);
}

static int da9063_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
	struct da9063_rtc *rtc = dev_get_drvdata(dev);
	unsigned long tm_secs;
	unsigned long al_secs;
	u8 data[RTC_DATA_LEN];
	int ret;

	ret = regmap_bulk_read(rtc->hw->regmap, DA9063_REG_COUNT_S,
			       data, RTC_DATA_LEN);
	if (ret < 0) {
		dev_err(dev, "Failed to read RTC time data: %d\n", ret);
		return ret;
	}

	if (!(data[RTC_SEC] & DA9063_RTC_READ)) {
		dev_dbg(dev, "RTC not yet ready to be read by the host\n");
		return -EINVAL;
	}

	da9063_data_to_tm(data, tm);

	rtc_tm_to_time(tm, &tm_secs);
	rtc_tm_to_time(&rtc->alarm_time, &al_secs);

	/* handle the rtc synchronisation delay */
	if (rtc->rtc_sync == true && al_secs - tm_secs == 1)
		memcpy(tm, &rtc->alarm_time, sizeof(struct rtc_time));
	else
		rtc->rtc_sync = false;

	return rtc_valid_tm(tm);
}

static int da9063_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
	struct da9063_rtc *rtc = dev_get_drvdata(dev);
	u8 data[RTC_DATA_LEN];
	int ret;

	da9063_tm_to_data(tm, data);
	ret = regmap_bulk_write(rtc->hw->regmap, DA9063_REG_COUNT_S,
				data, RTC_DATA_LEN);
	if (ret < 0)
		dev_err(dev, "Failed to set RTC time data: %d\n", ret);

	return ret;
}

static int da9063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct da9063_rtc *rtc = dev_get_drvdata(dev);
	u8 data[RTC_DATA_LEN];
	int ret;
	unsigned int val;

	ret = regmap_bulk_read(rtc->hw->regmap, DA9063_REG_ALARM_S,
			       &data[RTC_SEC], RTC_DATA_LEN);
	if (ret < 0)
		return ret;

	da9063_data_to_tm(data, &alrm->time);

	alrm->enabled = !!(data[RTC_YEAR] & DA9063_ALARM_ON);

	ret = regmap_read(rtc->hw->regmap, DA9063_REG_EVENT_A, &val);
	if (ret < 0)
		return ret;

	if (val & (DA9063_E_ALARM))
		alrm->pending = 1;
	else
		alrm->pending = 0;

	return 0;
}

static int da9063_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct da9063_rtc *rtc = dev_get_drvdata(dev);
	u8 data[RTC_DATA_LEN];
	int ret;

	da9063_tm_to_data(&alrm->time, data);

	ret = da9063_rtc_stop_alarm(dev);
	if (ret < 0) {
		dev_err(dev, "Failed to stop alarm: %d\n", ret);
		return ret;
	}

	ret = regmap_bulk_write(rtc->hw->regmap, DA9063_REG_ALARM_S,
				data, RTC_DATA_LEN);
	if (ret < 0) {
		dev_err(dev, "Failed to write alarm: %d\n", ret);
		return ret;
	}

	rtc->alarm_time = alrm->time;

	if (alrm->enabled) {
		ret = da9063_rtc_start_alarm(dev);
		if (ret < 0) {
			dev_err(dev, "Failed to start alarm: %d\n", ret);
			return ret;
		}
	}

	return ret;
}

static int da9063_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
	if (enabled)
		return da9063_rtc_start_alarm(dev);
	else
		return da9063_rtc_stop_alarm(dev);
}

static irqreturn_t da9063_alarm_event(int irq, void *data)
{
	struct da9063_rtc *rtc = data;

	regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y,
			   DA9063_ALARM_ON, 0);

	rtc->rtc_sync = true;
	rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF);

	return IRQ_HANDLED;
}

static const struct rtc_class_ops da9063_rtc_ops = {
	.read_time = da9063_rtc_read_time,
	.set_time = da9063_rtc_set_time,
	.read_alarm = da9063_rtc_read_alarm,
	.set_alarm = da9063_rtc_set_alarm,
	.alarm_irq_enable = da9063_rtc_alarm_irq_enable,
};

static int da9063_rtc_probe(struct platform_device *pdev)
{
	struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
	struct da9063_rtc *rtc;
	int irq_alarm;
	u8 data[RTC_DATA_LEN];
	int ret;

	ret = regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_E,
				 DA9063_RTC_EN, DA9063_RTC_EN);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to enable RTC\n");
		goto err;
	}

	ret = regmap_update_bits(da9063->regmap, DA9063_REG_EN_32K,
				 DA9063_CRYSTAL, DA9063_CRYSTAL);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to run 32kHz oscillator\n");
		goto err;
	}

	ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_S,
			DA9063_ALARM_STATUS_TICK | DA9063_ALARM_STATUS_ALARM,
			0);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to access RTC alarm register\n");
		goto err;
	}

	ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_S,
				 DA9063_ALARM_STATUS_ALARM,
				 DA9063_ALARM_STATUS_ALARM);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to access RTC alarm register\n");
		goto err;
	}

	ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_Y,
				 DA9063_TICK_ON, 0);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to disable TICKs\n");
		goto err;
	}

	ret = regmap_bulk_read(da9063->regmap, DA9063_REG_ALARM_S,
			       data, RTC_DATA_LEN);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to read initial alarm data: %d\n",
			ret);
		goto err;
	}

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

	platform_set_drvdata(pdev, rtc);

	irq_alarm = platform_get_irq_byname(pdev, "ALARM");
	ret = devm_request_threaded_irq(&pdev->dev, irq_alarm, NULL,
					da9063_alarm_event,
					IRQF_TRIGGER_LOW | IRQF_ONESHOT,
					"ALARM", rtc);
	if (ret) {
		dev_err(&pdev->dev, "Failed to request ALARM IRQ %d: %d\n",
			irq_alarm, ret);
		goto err;
	}

	rtc->hw = da9063;
	rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, DA9063_DRVNAME_RTC,
					   &da9063_rtc_ops, THIS_MODULE);
	if (IS_ERR(rtc->rtc_dev))
		return PTR_ERR(rtc->rtc_dev);

	da9063_data_to_tm(data, &rtc->alarm_time);
	rtc->rtc_sync = false;
err:
	return ret;
}

static struct platform_driver da9063_rtc_driver = {
	.probe		= da9063_rtc_probe,
	.driver		= {
		.name	= DA9063_DRVNAME_RTC,
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(da9063_rtc_driver);

MODULE_AUTHOR("S Twiss <[email protected]>");
MODULE_DESCRIPTION("Real time clock device driver for Dialog DA9063");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DA9063_DRVNAME_RTC);
Commit	Line	Data
c2a57550 OST	1	/* rtc-da9063.c - Real time clock device driver for DA9063
	2	* Copyright (C) 2013-14 Dialog Semiconductor Ltd.
	3	*
	4	* This library is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Library General Public
	6	* License as published by the Free Software Foundation; either
	7	* version 2 of the License, or (at your option) any later version.
	8	*
	9	* This library is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Library General Public License for more details.
	13	*/
	14
	15	#include <linux/kernel.h>
	16	#include <linux/module.h>
	17	#include <linux/init.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/rtc.h>
	21	#include <linux/slab.h>
	22	#include <linux/delay.h>
	23	#include <linux/regmap.h>
	24	#include <linux/mfd/da9063/registers.h>
	25	#include <linux/mfd/da9063/core.h>
	26
	27	#define YEARS_TO_DA9063(year) ((year) - 100)
	28	#define MONTHS_TO_DA9063(month) ((month) + 1)
	29	#define YEARS_FROM_DA9063(year) ((year) + 100)
	30	#define MONTHS_FROM_DA9063(month) ((month) - 1)
	31
	32	#define RTC_DATA_LEN (DA9063_REG_COUNT_Y - DA9063_REG_COUNT_S + 1)
	33	#define RTC_SEC 0
	34	#define RTC_MIN 1
	35	#define RTC_HOUR 2
	36	#define RTC_DAY 3
	37	#define RTC_MONTH 4
	38	#define RTC_YEAR 5
	39
	40	struct da9063_rtc {
	41	struct rtc_device *rtc_dev;
	42	struct da9063 *hw;
	43	struct rtc_time alarm_time;
	44	bool rtc_sync;
	45	};
	46
	47	static void da9063_data_to_tm(u8 data, struct rtc_time tm)
	48	{
	49	tm->tm_sec = data[RTC_SEC] & DA9063_COUNT_SEC_MASK;
	50	tm->tm_min = data[RTC_MIN] & DA9063_COUNT_MIN_MASK;
	51	tm->tm_hour = data[RTC_HOUR] & DA9063_COUNT_HOUR_MASK;
	52	tm->tm_mday = data[RTC_DAY] & DA9063_COUNT_DAY_MASK;
	53	tm->tm_mon = MONTHS_FROM_DA9063(data[RTC_MONTH] &
	54	DA9063_COUNT_MONTH_MASK);
	55	tm->tm_year = YEARS_FROM_DA9063(data[RTC_YEAR] &
	56	DA9063_COUNT_YEAR_MASK);
	57	}
	58
	59	static void da9063_tm_to_data(struct rtc_time tm, u8 data)
	60	{
	61	data[RTC_SEC] &= ~DA9063_COUNT_SEC_MASK;
	62	data[RTC_SEC] \|= tm->tm_sec & DA9063_COUNT_SEC_MASK;
	63
	64	data[RTC_MIN] &= ~DA9063_COUNT_MIN_MASK;
65	data[RTC_MIN] \|= tm->tm_min & DA9063_COUNT_MIN_MASK;
66
67	data[RTC_HOUR] &= ~DA9063_COUNT_HOUR_MASK;
68	data[RTC_HOUR] \|= tm->tm_hour & DA9063_COUNT_HOUR_MASK;
69
70	data[RTC_DAY] &= ~DA9063_COUNT_DAY_MASK;
71	data[RTC_DAY] \|= tm->tm_mday & DA9063_COUNT_DAY_MASK;
72
73	data[RTC_MONTH] &= ~DA9063_COUNT_MONTH_MASK;
74	data[RTC_MONTH] \|= MONTHS_TO_DA9063(tm->tm_mon) &
75	DA9063_COUNT_MONTH_MASK;
76
77	data[RTC_YEAR] &= ~DA9063_COUNT_YEAR_MASK;
78	data[RTC_YEAR] \|= YEARS_TO_DA9063(tm->tm_year) &
79	DA9063_COUNT_YEAR_MASK;
80	}
81
82	static int da9063_rtc_stop_alarm(struct device *dev)
83	{
84	struct da9063_rtc *rtc = dev_get_drvdata(dev);
85
86	return regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y,
87	DA9063_ALARM_ON, 0);
88	}
89
90	static int da9063_rtc_start_alarm(struct device *dev)
91	{
92	struct da9063_rtc *rtc = dev_get_drvdata(dev);
93
94	return regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y,
95	DA9063_ALARM_ON, DA9063_ALARM_ON);
96	}
97
98	static int da9063_rtc_read_time(struct device dev, struct rtc_time tm)
99	{
100	struct da9063_rtc *rtc = dev_get_drvdata(dev);
101	unsigned long tm_secs;
102	unsigned long al_secs;
103	u8 data[RTC_DATA_LEN];
104	int ret;
105
106	ret = regmap_bulk_read(rtc->hw->regmap, DA9063_REG_COUNT_S,
107	data, RTC_DATA_LEN);
108	if (ret < 0) {
109	dev_err(dev, "Failed to read RTC time data: %d\n", ret);
110	return ret;
111	}
112
113	if (!(data[RTC_SEC] & DA9063_RTC_READ)) {
114	dev_dbg(dev, "RTC not yet ready to be read by the host\n");
115	return -EINVAL;
116	}
117
118	da9063_data_to_tm(data, tm);
119
120	rtc_tm_to_time(tm, &tm_secs);
121	rtc_tm_to_time(&rtc->alarm_time, &al_secs);
122
123	/* handle the rtc synchronisation delay */
124	if (rtc->rtc_sync == true && al_secs - tm_secs == 1)
125	memcpy(tm, &rtc->alarm_time, sizeof(struct rtc_time));
126	else
127	rtc->rtc_sync = false;
128
129	return rtc_valid_tm(tm);
130	}
131
132	static int da9063_rtc_set_time(struct device dev, struct rtc_time tm)
133	{
134	struct da9063_rtc *rtc = dev_get_drvdata(dev);
135	u8 data[RTC_DATA_LEN];
136	int ret;
137
138	da9063_tm_to_data(tm, data);
139	ret = regmap_bulk_write(rtc->hw->regmap, DA9063_REG_COUNT_S,
140	data, RTC_DATA_LEN);
141	if (ret < 0)
142	dev_err(dev, "Failed to set RTC time data: %d\n", ret);
143
144	return ret;
145	}
146
147	static int da9063_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
148	{
149	struct da9063_rtc *rtc = dev_get_drvdata(dev);
150	u8 data[RTC_DATA_LEN];
151	int ret;
152	unsigned int val;
153
154	ret = regmap_bulk_read(rtc->hw->regmap, DA9063_REG_ALARM_S,
155	&data[RTC_SEC], RTC_DATA_LEN);
156	if (ret < 0)
157	return ret;
158
159	da9063_data_to_tm(data, &alrm->time);
160
161	alrm->enabled = !!(data[RTC_YEAR] & DA9063_ALARM_ON);
162
163	ret = regmap_read(rtc->hw->regmap, DA9063_REG_EVENT_A, &val);
164	if (ret < 0)
165	return ret;
166
167	if (val & (DA9063_E_ALARM))
168	alrm->pending = 1;
169	else
170	alrm->pending = 0;
171
172	return 0;
173	}
174
175	static int da9063_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
176	{
177	struct da9063_rtc *rtc = dev_get_drvdata(dev);
178	u8 data[RTC_DATA_LEN];
179	int ret;
180
181	da9063_tm_to_data(&alrm->time, data);
182
183	ret = da9063_rtc_stop_alarm(dev);
184	if (ret < 0) {
185	dev_err(dev, "Failed to stop alarm: %d\n", ret);
186	return ret;
187	}
188
189	ret = regmap_bulk_write(rtc->hw->regmap, DA9063_REG_ALARM_S,
190	data, RTC_DATA_LEN);
191	if (ret < 0) {
192	dev_err(dev, "Failed to write alarm: %d\n", ret);
193	return ret;
194	}
195
196	rtc->alarm_time = alrm->time;
197
198	if (alrm->enabled) {
199	ret = da9063_rtc_start_alarm(dev);
200	if (ret < 0) {
201	dev_err(dev, "Failed to start alarm: %d\n", ret);
202	return ret;
203	}
204	}
205
206	return ret;
207	}
208
209	static int da9063_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
210	{
211	if (enabled)
212	return da9063_rtc_start_alarm(dev);
213	else
214	return da9063_rtc_stop_alarm(dev);
215	}
216
217	static irqreturn_t da9063_alarm_event(int irq, void *data)
218	{
219	struct da9063_rtc *rtc = data;
220
221	regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y,
222	DA9063_ALARM_ON, 0);
223
224	rtc->rtc_sync = true;
225	rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF \| RTC_AF);
226
227	return IRQ_HANDLED;
228	}
229
230	static const struct rtc_class_ops da9063_rtc_ops = {
231	.read_time = da9063_rtc_read_time,
232	.set_time = da9063_rtc_set_time,
233	.read_alarm = da9063_rtc_read_alarm,
234	.set_alarm = da9063_rtc_set_alarm,
235	.alarm_irq_enable = da9063_rtc_alarm_irq_enable,
236	};
237
238	static int da9063_rtc_probe(struct platform_device *pdev)
239	{
240	struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
241	struct da9063_rtc *rtc;
242	int irq_alarm;
243	u8 data[RTC_DATA_LEN];
244	int ret;
245
246	ret = regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_E,
247	DA9063_RTC_EN, DA9063_RTC_EN);
248	if (ret < 0) {
249	dev_err(&pdev->dev, "Failed to enable RTC\n");
250	goto err;
251	}
252
253	ret = regmap_update_bits(da9063->regmap, DA9063_REG_EN_32K,
254	DA9063_CRYSTAL, DA9063_CRYSTAL);
255	if (ret < 0) {
256	dev_err(&pdev->dev, "Failed to run 32kHz oscillator\n");
257	goto err;
258	}
259
260	ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_S,
261	DA9063_ALARM_STATUS_TICK \| DA9063_ALARM_STATUS_ALARM,
262	0);
263	if (ret < 0) {
264	dev_err(&pdev->dev, "Failed to access RTC alarm register\n");
265	goto err;
266	}
267
268	ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_S,
269	DA9063_ALARM_STATUS_ALARM,
270	DA9063_ALARM_STATUS_ALARM);
271	if (ret < 0) {
272	dev_err(&pdev->dev, "Failed to access RTC alarm register\n");
273	goto err;
274	}
275
276	ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_Y,
277	DA9063_TICK_ON, 0);
278	if (ret < 0) {
279	dev_err(&pdev->dev, "Failed to disable TICKs\n");
280	goto err;
281	}
282
283	ret = regmap_bulk_read(da9063->regmap, DA9063_REG_ALARM_S,
284	data, RTC_DATA_LEN);
285	if (ret < 0) {
286	dev_err(&pdev->dev, "Failed to read initial alarm data: %d\n",
287	ret);
288	goto err;
289	}
290
291	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
292	if (!rtc)
293	return -ENOMEM;
294
295	platform_set_drvdata(pdev, rtc);
296
297	irq_alarm = platform_get_irq_byname(pdev, "ALARM");
298	ret = devm_request_threaded_irq(&pdev->dev, irq_alarm, NULL,
299	da9063_alarm_event,
300	IRQF_TRIGGER_LOW \| IRQF_ONESHOT,
301	"ALARM", rtc);
302	if (ret) {
303	dev_err(&pdev->dev, "Failed to request ALARM IRQ %d: %d\n",
304	irq_alarm, ret);
305	goto err;
306	}
307
308	rtc->hw = da9063;
309	rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, DA9063_DRVNAME_RTC,
310	&da9063_rtc_ops, THIS_MODULE);
311	if (IS_ERR(rtc->rtc_dev))
312	return PTR_ERR(rtc->rtc_dev);
313
314	da9063_data_to_tm(data, &rtc->alarm_time);
315	rtc->rtc_sync = false;
316	err:
317	return ret;
318	}
319
320	static struct platform_driver da9063_rtc_driver = {
321	.probe = da9063_rtc_probe,
322	.driver = {
323	.name = DA9063_DRVNAME_RTC,
324	.owner = THIS_MODULE,
325	},
326	};
327
328	module_platform_driver(da9063_rtc_driver);
329
330	MODULE_AUTHOR("S Twiss <[email protected]>");
331	MODULE_DESCRIPTION("Real time clock device driver for Dialog DA9063");
332	MODULE_LICENSE("GPL v2");
333	MODULE_ALIAS("platform:" DA9063_DRVNAME_RTC);