[linux.git] / drivers / rtc / rtc-tps6586x.c

/*
 * rtc-tps6586x.c: RTC driver for TI PMIC TPS6586X
 *
 * Copyright (c) 2012, NVIDIA Corporation.
 *
 * Author: Laxman Dewangan <[email protected]>
 *
 * 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 version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
 * whether express or implied; 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/device.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mfd/tps6586x.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/rtc.h>
#include <linux/slab.h>

#define RTC_CTRL			0xc0
#define POR_RESET_N			BIT(7)
#define OSC_SRC_SEL			BIT(6)
#define RTC_ENABLE			BIT(5)	/* enables alarm */
#define RTC_BUF_ENABLE			BIT(4)	/* 32 KHz buffer enable */
#define PRE_BYPASS			BIT(3)	/* 0=1KHz or 1=32KHz updates */
#define CL_SEL_MASK			(BIT(2)|BIT(1))
#define CL_SEL_POS			1
#define RTC_ALARM1_HI			0xc1
#define RTC_COUNT4			0xc6

/* start a PMU RTC access by reading the register prior to the RTC_COUNT4 */
#define RTC_COUNT4_DUMMYREAD		0xc5

/*only 14-bits width in second*/
#define ALM1_VALID_RANGE_IN_SEC		0x3FFF

#define TPS6586X_RTC_CL_SEL_1_5PF	0x0
#define TPS6586X_RTC_CL_SEL_6_5PF	0x1
#define TPS6586X_RTC_CL_SEL_7_5PF	0x2
#define TPS6586X_RTC_CL_SEL_12_5PF	0x3

struct tps6586x_rtc {
	struct device		*dev;
	struct rtc_device	*rtc;
	int			irq;
	bool			irq_en;
	unsigned long long	epoch_start;
};

static inline struct device *to_tps6586x_dev(struct device *dev)
{
	return dev->parent;
}

static int tps6586x_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
	struct device *tps_dev = to_tps6586x_dev(dev);
	unsigned long long ticks = 0;
	unsigned long seconds;
	u8 buff[6];
	int ret;
	int i;

	ret = tps6586x_reads(tps_dev, RTC_COUNT4_DUMMYREAD, sizeof(buff), buff);
	if (ret < 0) {
		dev_err(dev, "read counter failed with err %d\n", ret);
		return ret;
	}

	for (i = 1; i < sizeof(buff); i++) {
		ticks <<= 8;
		ticks |= buff[i];
	}

	seconds = ticks >> 10;
	seconds += rtc->epoch_start;
	rtc_time_to_tm(seconds, tm);
	return rtc_valid_tm(tm);
}

static int tps6586x_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
	struct device *tps_dev = to_tps6586x_dev(dev);
	unsigned long long ticks;
	unsigned long seconds;
	u8 buff[5];
	int ret;

	rtc_tm_to_time(tm, &seconds);
	if (seconds < rtc->epoch_start) {
		dev_err(dev, "requested time unsupported\n");
		return -EINVAL;
	}
	seconds -= rtc->epoch_start;

	ticks = (unsigned long long)seconds << 10;
	buff[0] = (ticks >> 32) & 0xff;
	buff[1] = (ticks >> 24) & 0xff;
	buff[2] = (ticks >> 16) & 0xff;
	buff[3] = (ticks >> 8) & 0xff;
	buff[4] = ticks & 0xff;

	/* Disable RTC before changing time */
	ret = tps6586x_clr_bits(tps_dev, RTC_CTRL, RTC_ENABLE);
	if (ret < 0) {
		dev_err(dev, "failed to clear RTC_ENABLE\n");
		return ret;
	}

	ret = tps6586x_writes(tps_dev, RTC_COUNT4, sizeof(buff), buff);
	if (ret < 0) {
		dev_err(dev, "failed to program new time\n");
		return ret;
	}

	/* Enable RTC */
	ret = tps6586x_set_bits(tps_dev, RTC_CTRL, RTC_ENABLE);
	if (ret < 0) {
		dev_err(dev, "failed to set RTC_ENABLE\n");
		return ret;
	}
	return 0;
}

static int tps6586x_rtc_alarm_irq_enable(struct device *dev,
			 unsigned int enabled)
{
	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);

	if (enabled && !rtc->irq_en) {
		enable_irq(rtc->irq);
		rtc->irq_en = true;
	} else if (!enabled && rtc->irq_en)  {
		disable_irq(rtc->irq);
		rtc->irq_en = false;
	}
	return 0;
}

static int tps6586x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
	struct device *tps_dev = to_tps6586x_dev(dev);
	unsigned long seconds;
	unsigned long ticks;
	unsigned long rtc_current_time;
	unsigned long long rticks = 0;
	u8 buff[3];
	u8 rbuff[6];
	int ret;
	int i;

	rtc_tm_to_time(&alrm->time, &seconds);

	if (alrm->enabled && (seconds < rtc->epoch_start)) {
		dev_err(dev, "can't set alarm to requested time\n");
		return -EINVAL;
	}

	ret = tps6586x_rtc_alarm_irq_enable(dev, alrm->enabled);
	if (ret < 0) {
		dev_err(dev, "can't set alarm irq, err %d\n", ret);
		return ret;
	}

	seconds -= rtc->epoch_start;
	ret = tps6586x_reads(tps_dev, RTC_COUNT4_DUMMYREAD,
			sizeof(rbuff), rbuff);
	if (ret < 0) {
		dev_err(dev, "read counter failed with err %d\n", ret);
		return ret;
	}

	for (i = 1; i < sizeof(rbuff); i++) {
		rticks <<= 8;
		rticks |= rbuff[i];
	}

	rtc_current_time = rticks >> 10;
	if ((seconds - rtc_current_time) > ALM1_VALID_RANGE_IN_SEC)
		seconds = rtc_current_time - 1;

	ticks = (unsigned long long)seconds << 10;
	buff[0] = (ticks >> 16) & 0xff;
	buff[1] = (ticks >> 8) & 0xff;
	buff[2] = ticks & 0xff;

	ret = tps6586x_writes(tps_dev, RTC_ALARM1_HI, sizeof(buff), buff);
	if (ret)
		dev_err(dev, "programming alarm failed with err %d\n", ret);

	return ret;
}

static int tps6586x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
	struct device *tps_dev = to_tps6586x_dev(dev);
	unsigned long ticks;
	unsigned long seconds;
	u8 buff[3];
	int ret;

	ret = tps6586x_reads(tps_dev, RTC_ALARM1_HI, sizeof(buff), buff);
	if (ret) {
		dev_err(dev, "read RTC_ALARM1_HI failed with err %d\n", ret);
		return ret;
	}

	ticks = (buff[0] << 16) | (buff[1] << 8) | buff[2];
	seconds = ticks >> 10;
	seconds += rtc->epoch_start;

	rtc_time_to_tm(seconds, &alrm->time);
	return 0;
}

static const struct rtc_class_ops tps6586x_rtc_ops = {
	.read_time	= tps6586x_rtc_read_time,
	.set_time	= tps6586x_rtc_set_time,
	.set_alarm	= tps6586x_rtc_set_alarm,
	.read_alarm	= tps6586x_rtc_read_alarm,
	.alarm_irq_enable = tps6586x_rtc_alarm_irq_enable,
};

static irqreturn_t tps6586x_rtc_irq(int irq, void *data)
{
	struct tps6586x_rtc *rtc = data;

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

static int tps6586x_rtc_probe(struct platform_device *pdev)
{
	struct device *tps_dev = to_tps6586x_dev(&pdev->dev);
	struct tps6586x_rtc *rtc;
	int ret;

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

	rtc->dev = &pdev->dev;
	rtc->irq = platform_get_irq(pdev, 0);

	/* Set epoch start as 00:00:00:01:01:2009 */
	rtc->epoch_start = mktime(2009, 1, 1, 0, 0, 0);

	/* 1 kHz tick mode, enable tick counting */
	ret = tps6586x_update(tps_dev, RTC_CTRL,
		RTC_ENABLE | OSC_SRC_SEL |
		((TPS6586X_RTC_CL_SEL_1_5PF << CL_SEL_POS) & CL_SEL_MASK),
		RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK);
	if (ret < 0) {
		dev_err(&pdev->dev, "unable to start counter\n");
		return ret;
	}

	device_init_wakeup(&pdev->dev, 1);

	platform_set_drvdata(pdev, rtc);
	rtc->rtc = devm_rtc_device_register(&pdev->dev, dev_name(&pdev->dev),
				       &tps6586x_rtc_ops, THIS_MODULE);
	if (IS_ERR(rtc->rtc)) {
		ret = PTR_ERR(rtc->rtc);
		dev_err(&pdev->dev, "RTC device register: ret %d\n", ret);
		goto fail_rtc_register;
	}

	ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL,
				tps6586x_rtc_irq,
				IRQF_ONESHOT | IRQF_EARLY_RESUME,
				dev_name(&pdev->dev), rtc);
	if (ret < 0) {
		dev_err(&pdev->dev, "request IRQ(%d) failed with ret %d\n",
				rtc->irq, ret);
		goto fail_rtc_register;
	}
	disable_irq(rtc->irq);
	return 0;

fail_rtc_register:
	tps6586x_update(tps_dev, RTC_CTRL, 0,
		RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK);
	return ret;
};

static int tps6586x_rtc_remove(struct platform_device *pdev)
{
	struct device *tps_dev = to_tps6586x_dev(&pdev->dev);

	tps6586x_update(tps_dev, RTC_CTRL, 0,
		RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK);
	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int tps6586x_rtc_suspend(struct device *dev)
{
	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);

	if (device_may_wakeup(dev))
		enable_irq_wake(rtc->irq);
	return 0;
}

static int tps6586x_rtc_resume(struct device *dev)
{
	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);

	if (device_may_wakeup(dev))
		disable_irq_wake(rtc->irq);
	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_rtc_suspend,
			tps6586x_rtc_resume);

static struct platform_driver tps6586x_rtc_driver = {
	.driver	= {
		.name	= "tps6586x-rtc",
		.pm	= &tps6586x_pm_ops,
	},
	.probe	= tps6586x_rtc_probe,
	.remove	= tps6586x_rtc_remove,
};
module_platform_driver(tps6586x_rtc_driver);

MODULE_ALIAS("platform:rtc-tps6586x");
MODULE_DESCRIPTION("TI TPS6586x RTC driver");
MODULE_AUTHOR("Laxman dewangan <[email protected]>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
dc59ed38 LD	1	/*
	2	* rtc-tps6586x.c: RTC driver for TI PMIC TPS6586X
	3	*
	4	* Copyright (c) 2012, NVIDIA Corporation.
	5	*
	6	* Author: Laxman Dewangan <[email protected]>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation version 2.
	11	*
	12	* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
	13	* whether express or implied; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* 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
	20	* 02111-1307, USA
	21	*/
	22
	23	#include <linux/device.h>
	24	#include <linux/err.h>
	25	#include <linux/init.h>
	26	#include <linux/kernel.h>
	27	#include <linux/mfd/tps6586x.h>
	28	#include <linux/module.h>
	29	#include <linux/platform_device.h>
	30	#include <linux/pm_runtime.h>
	31	#include <linux/rtc.h>
	32	#include <linux/slab.h>
	33
	34	#define RTC_CTRL 0xc0
	35	#define POR_RESET_N BIT(7)
	36	#define OSC_SRC_SEL BIT(6)
	37	#define RTC_ENABLE BIT(5) /* enables alarm */
	38	#define RTC_BUF_ENABLE BIT(4) /* 32 KHz buffer enable */
	39	#define PRE_BYPASS BIT(3) /* 0=1KHz or 1=32KHz updates */
	40	#define CL_SEL_MASK (BIT(2)\|BIT(1))
	41	#define CL_SEL_POS 1
	42	#define RTC_ALARM1_HI 0xc1
	43	#define RTC_COUNT4 0xc6
	44
	45	/* start a PMU RTC access by reading the register prior to the RTC_COUNT4 */
	46	#define RTC_COUNT4_DUMMYREAD 0xc5
	47
	48	/only 14-bits width in second/
	49	#define ALM1_VALID_RANGE_IN_SEC 0x3FFF
	50
	51	#define TPS6586X_RTC_CL_SEL_1_5PF 0x0
	52	#define TPS6586X_RTC_CL_SEL_6_5PF 0x1
	53	#define TPS6586X_RTC_CL_SEL_7_5PF 0x2
	54	#define TPS6586X_RTC_CL_SEL_12_5PF 0x3
	55
	56	struct tps6586x_rtc {
	57	struct device *dev;
	58	struct rtc_device *rtc;
	59	int irq;
	60	bool irq_en;
	61	unsigned long long epoch_start;
	62	};
	63
	64	static inline struct device to_tps6586x_dev(struct device dev)
65	{
66	return dev->parent;
67	}
68
69	static int tps6586x_rtc_read_time(struct device dev, struct rtc_time tm)
70	{
71	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
72	struct device *tps_dev = to_tps6586x_dev(dev);
73	unsigned long long ticks = 0;
74	unsigned long seconds;
75	u8 buff[6];
76	int ret;
77	int i;
78
79	ret = tps6586x_reads(tps_dev, RTC_COUNT4_DUMMYREAD, sizeof(buff), buff);
80	if (ret < 0) {
81	dev_err(dev, "read counter failed with err %d\n", ret);
82	return ret;
83	}
84
85	for (i = 1; i < sizeof(buff); i++) {
86	ticks <<= 8;
87	ticks \|= buff[i];
88	}
89
90	seconds = ticks >> 10;
91	seconds += rtc->epoch_start;
92	rtc_time_to_tm(seconds, tm);
93	return rtc_valid_tm(tm);
94	}
95
96	static int tps6586x_rtc_set_time(struct device dev, struct rtc_time tm)
97	{
98	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
99	struct device *tps_dev = to_tps6586x_dev(dev);
100	unsigned long long ticks;
101	unsigned long seconds;
102	u8 buff[5];
103	int ret;
104
105	rtc_tm_to_time(tm, &seconds);
106	if (seconds < rtc->epoch_start) {
107	dev_err(dev, "requested time unsupported\n");
108	return -EINVAL;
109	}
110	seconds -= rtc->epoch_start;
111
112	ticks = (unsigned long long)seconds << 10;
113	buff[0] = (ticks >> 32) & 0xff;
114	buff[1] = (ticks >> 24) & 0xff;
115	buff[2] = (ticks >> 16) & 0xff;
116	buff[3] = (ticks >> 8) & 0xff;
117	buff[4] = ticks & 0xff;
118
119	/* Disable RTC before changing time */
120	ret = tps6586x_clr_bits(tps_dev, RTC_CTRL, RTC_ENABLE);
121	if (ret < 0) {
122	dev_err(dev, "failed to clear RTC_ENABLE\n");
123	return ret;
124	}
125
126	ret = tps6586x_writes(tps_dev, RTC_COUNT4, sizeof(buff), buff);
127	if (ret < 0) {
128	dev_err(dev, "failed to program new time\n");
129	return ret;
130	}
131
132	/* Enable RTC */
133	ret = tps6586x_set_bits(tps_dev, RTC_CTRL, RTC_ENABLE);
134	if (ret < 0) {
135	dev_err(dev, "failed to set RTC_ENABLE\n");
136	return ret;
137	}
138	return 0;
139	}
140
141	static int tps6586x_rtc_alarm_irq_enable(struct device *dev,
142	unsigned int enabled)
143	{
144	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
145
146	if (enabled && !rtc->irq_en) {
147	enable_irq(rtc->irq);
148	rtc->irq_en = true;
149	} else if (!enabled && rtc->irq_en) {
150	disable_irq(rtc->irq);
151	rtc->irq_en = false;
152	}
153	return 0;
154	}
155
156	static int tps6586x_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
157	{
158	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
159	struct device *tps_dev = to_tps6586x_dev(dev);
160	unsigned long seconds;
161	unsigned long ticks;
162	unsigned long rtc_current_time;
163	unsigned long long rticks = 0;
164	u8 buff[3];
165	u8 rbuff[6];
166	int ret;
167	int i;
168
169	rtc_tm_to_time(&alrm->time, &seconds);
170
171	if (alrm->enabled && (seconds < rtc->epoch_start)) {
172	dev_err(dev, "can't set alarm to requested time\n");
173	return -EINVAL;
174	}
175
176	ret = tps6586x_rtc_alarm_irq_enable(dev, alrm->enabled);
177	if (ret < 0) {
178	dev_err(dev, "can't set alarm irq, err %d\n", ret);
179	return ret;
180	}
181
182	seconds -= rtc->epoch_start;
183	ret = tps6586x_reads(tps_dev, RTC_COUNT4_DUMMYREAD,
184	sizeof(rbuff), rbuff);
185	if (ret < 0) {
186	dev_err(dev, "read counter failed with err %d\n", ret);
187	return ret;
188	}
189
190	for (i = 1; i < sizeof(rbuff); i++) {
191	rticks <<= 8;
192	rticks \|= rbuff[i];
193	}
194
195	rtc_current_time = rticks >> 10;
196	if ((seconds - rtc_current_time) > ALM1_VALID_RANGE_IN_SEC)
197	seconds = rtc_current_time - 1;
198
199	ticks = (unsigned long long)seconds << 10;
200	buff[0] = (ticks >> 16) & 0xff;
201	buff[1] = (ticks >> 8) & 0xff;
202	buff[2] = ticks & 0xff;
203
204	ret = tps6586x_writes(tps_dev, RTC_ALARM1_HI, sizeof(buff), buff);
205	if (ret)
206	dev_err(dev, "programming alarm failed with err %d\n", ret);
207
208	return ret;
209	}
210
211	static int tps6586x_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
212	{
213	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
214	struct device *tps_dev = to_tps6586x_dev(dev);
215	unsigned long ticks;
216	unsigned long seconds;
217	u8 buff[3];
218	int ret;
219
220	ret = tps6586x_reads(tps_dev, RTC_ALARM1_HI, sizeof(buff), buff);
221	if (ret) {
222	dev_err(dev, "read RTC_ALARM1_HI failed with err %d\n", ret);
223	return ret;
224	}
225
226	ticks = (buff[0] << 16) \| (buff[1] << 8) \| buff[2];
227	seconds = ticks >> 10;
228	seconds += rtc->epoch_start;
229
230	rtc_time_to_tm(seconds, &alrm->time);
231	return 0;
232	}
233
234	static const struct rtc_class_ops tps6586x_rtc_ops = {
235	.read_time = tps6586x_rtc_read_time,
236	.set_time = tps6586x_rtc_set_time,
237	.set_alarm = tps6586x_rtc_set_alarm,
238	.read_alarm = tps6586x_rtc_read_alarm,
239	.alarm_irq_enable = tps6586x_rtc_alarm_irq_enable,
240	};
241
242	static irqreturn_t tps6586x_rtc_irq(int irq, void *data)
243	{
244	struct tps6586x_rtc *rtc = data;
245
246	rtc_update_irq(rtc->rtc, 1, RTC_IRQF \| RTC_AF);
247	return IRQ_HANDLED;
248	}
249
250	static int tps6586x_rtc_probe(struct platform_device *pdev)
251	{
252	struct device *tps_dev = to_tps6586x_dev(&pdev->dev);
253	struct tps6586x_rtc *rtc;
254	int ret;
255
256	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
257	if (!rtc)
258	return -ENOMEM;
259
260	rtc->dev = &pdev->dev;
261	rtc->irq = platform_get_irq(pdev, 0);
262
263	/* Set epoch start as 00:00:00:01:01:2009 */
264	rtc->epoch_start = mktime(2009, 1, 1, 0, 0, 0);
265
266	/* 1 kHz tick mode, enable tick counting */
267	ret = tps6586x_update(tps_dev, RTC_CTRL,
268	RTC_ENABLE \| OSC_SRC_SEL \|
269	((TPS6586X_RTC_CL_SEL_1_5PF << CL_SEL_POS) & CL_SEL_MASK),
270	RTC_ENABLE \| OSC_SRC_SEL \| PRE_BYPASS \| CL_SEL_MASK);
271	if (ret < 0) {
272	dev_err(&pdev->dev, "unable to start counter\n");
273	return ret;
274	}
275
5a280844 DO	276	device_init_wakeup(&pdev->dev, 1);
5a280844 DO	277
dc59ed38	278	platform_set_drvdata(pdev, rtc);
77cf81b3	279	rtc->rtc = devm_rtc_device_register(&pdev->dev, dev_name(&pdev->dev),
dc59ed38 LD	280	&tps6586x_rtc_ops, THIS_MODULE);
	281	if (IS_ERR(rtc->rtc)) {
	282	ret = PTR_ERR(rtc->rtc);
	283	dev_err(&pdev->dev, "RTC device register: ret %d\n", ret);
	284	goto fail_rtc_register;
	285	}
	286
190ab4af JH	287	ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL,
190ab4af JH	288	tps6586x_rtc_irq,
dc59ed38 LD	289	IRQF_ONESHOT \| IRQF_EARLY_RESUME,
	290	dev_name(&pdev->dev), rtc);
	291	if (ret < 0) {
	292	dev_err(&pdev->dev, "request IRQ(%d) failed with ret %d\n",
	293	rtc->irq, ret);
ad3f3cf4	294	goto fail_rtc_register;
dc59ed38 LD	295	}
dc59ed38 LD	296	disable_irq(rtc->irq);
dc59ed38 LD	297	return 0;
dc59ed38 LD	298
dc59ed38 LD	299	fail_rtc_register:
	300	tps6586x_update(tps_dev, RTC_CTRL, 0,
	301	RTC_ENABLE \| OSC_SRC_SEL \| PRE_BYPASS \| CL_SEL_MASK);
	302	return ret;
	303	};
	304
	305	static int tps6586x_rtc_remove(struct platform_device *pdev)
	306	{
dc59ed38 LD	307	struct device *tps_dev = to_tps6586x_dev(&pdev->dev);
	308
	309	tps6586x_update(tps_dev, RTC_CTRL, 0,
	310	RTC_ENABLE \| OSC_SRC_SEL \| PRE_BYPASS \| CL_SEL_MASK);
dc59ed38 LD	311	return 0;
	312	}
	313
	314	#ifdef CONFIG_PM_SLEEP
	315	static int tps6586x_rtc_suspend(struct device *dev)
	316	{
	317	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
	318
	319	if (device_may_wakeup(dev))
	320	enable_irq_wake(rtc->irq);
	321	return 0;
	322	}
	323
	324	static int tps6586x_rtc_resume(struct device *dev)
	325	{
	326	struct tps6586x_rtc *rtc = dev_get_drvdata(dev);
	327
	328	if (device_may_wakeup(dev))
	329	disable_irq_wake(rtc->irq);
	330	return 0;
	331	}
	332	#endif
	333
8070d053 JH	334	static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_rtc_suspend,
8070d053 JH	335	tps6586x_rtc_resume);
dc59ed38 LD	336
	337	static struct platform_driver tps6586x_rtc_driver = {
	338	.driver = {
	339	.name = "tps6586x-rtc",
dc59ed38 LD	340	.pm = &tps6586x_pm_ops,
	341	},
	342	.probe = tps6586x_rtc_probe,
	343	.remove = tps6586x_rtc_remove,
	344	};
	345	module_platform_driver(tps6586x_rtc_driver);
	346
	347	MODULE_ALIAS("platform:rtc-tps6586x");
	348	MODULE_DESCRIPTION("TI TPS6586x RTC driver");
	349	MODULE_AUTHOR("Laxman dewangan <[email protected]>");
	350	MODULE_LICENSE("GPL v2");