Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 75b61022 authored by Magnus Damm's avatar Magnus Damm Committed by Linus Torvalds
Browse files

rtc: add support for Epson RTC-9701JE V4 



Add support for the Epson RTC-9701JE SPI RTC device.

Signed-off-by: default avatarMagnus Damm <damm@igel.co.jp>
Acked-by: default avatarAlessandro Zummo <a.zummo@towertech.it>
Acked-by: default avatarDavid Brownell <david-b@pacbell.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2805b969

drivers/rtc/rtc-r9701.c

+10 −27
Original line number Diff line number Diff line 
/* drivers/rtc/rtc-r9701.c

 *

/*

 * Driver for Epson RTC-9701JE

 *

 * Copyright (C) 2008 Magnus Damm

 *

 * Based on drivers/rtc/rtc-max6902.c

 * Based on rtc-max6902.c

 *

 * Copyright (C) 2006 8D Technologies inc.

 * Copyright (C) 2004 Compulab Ltd.
@@ -72,13 +71,12 @@ static int read_regs(struct device *dev, unsigned char *regs, int no_regs) 


static int r9701_get_datetime(struct device *dev, struct rtc_time *dt)

{

	struct spi_device *spi = to_spi_device(dev);

	unsigned long time;

	int ret;

	unsigned char buf[] = { RSECCNT, RMINCNT, RHRCNT,

				RDAYCNT, RMONCNT, RYRCNT };



	ret = read_regs(&spi->dev, buf, ARRAY_SIZE(buf));

	ret = read_regs(dev, buf, ARRAY_SIZE(buf));

	if (ret)

		return ret;
@@ -96,17 +94,7 @@ static int r9701_get_datetime(struct device *dev, struct rtc_time *dt) 
	 * according to the data sheet. make sure they are valid.

	 */



	ret = rtc_valid_tm(dt);

	if (ret)

		return ret;



	/* don't bother with yday, wday and isdst.

	 * let the rtc core calculate them for us.

	 */



	rtc_tm_to_time(dt, &time);

	rtc_time_to_tm(time, dt);

	return 0;

	return rtc_valid_tm(dt);

}



static int r9701_set_datetime(struct device *dev, struct rtc_time *dt)
@@ -118,12 +106,12 @@ static int r9701_set_datetime(struct device *dev, struct rtc_time *dt) 
		return -EINVAL;



	ret = write_reg(dev, RHRCNT, BIN2BCD(dt->tm_hour));

	ret |= write_reg(dev, RMINCNT, BIN2BCD(dt->tm_min));

	ret |= write_reg(dev, RSECCNT, BIN2BCD(dt->tm_sec));

	ret |= write_reg(dev, RDAYCNT, BIN2BCD(dt->tm_mday));

	ret |= write_reg(dev, RMONCNT, BIN2BCD(dt->tm_mon + 1));

	ret |= write_reg(dev, RYRCNT, BIN2BCD(dt->tm_year - 100));

	ret |= write_reg(dev, RWKCNT, 1 << dt->tm_wday);

	ret = ret ? ret : write_reg(dev, RMINCNT, BIN2BCD(dt->tm_min));

	ret = ret ? ret : write_reg(dev, RSECCNT, BIN2BCD(dt->tm_sec));

	ret = ret ? ret : write_reg(dev, RDAYCNT, BIN2BCD(dt->tm_mday));

	ret = ret ? ret : write_reg(dev, RMONCNT, BIN2BCD(dt->tm_mon + 1));

	ret = ret ? ret : write_reg(dev, RYRCNT, BIN2BCD(dt->tm_year - 100));

	ret = ret ? ret : write_reg(dev, RWKCNT, 1 << dt->tm_wday);



	return ret;

}
@@ -146,10 +134,6 @@ static int __devinit r9701_probe(struct spi_device *spi) 


	dev_set_drvdata(&spi->dev, rtc);



	spi->mode = SPI_MODE_3;

	spi->bits_per_word = 8;

	spi_setup(spi);



	tmp = R100CNT;

	res = read_regs(&spi->dev, &tmp, 1);

	if (res || tmp != 0x20) {
@@ -171,7 +155,6 @@ static int __devexit r9701_remove(struct spi_device *spi) 
static struct spi_driver r9701_driver = {

	.driver = {

		.name	= "rtc-r9701",

		.bus	= &spi_bus_type,

		.owner	= THIS_MODULE,

	},

	.probe	= r9701_probe,