diff options
| author | Magnus Damm <magnus.damm@gmail.com> | 2008-02-06 01:38:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-06 10:41:14 -0800 |
| commit | 75b6102257874a4ea796af686de2f72cfa0452f9 (patch) | |
| tree | 1605df88c3a77a61cc77be5eec6836793fca2143 /drivers/rtc | |
| parent | 2805b9698445e898ca6e5ffdc132e80d94664a0f (diff) | |
| download | linux-75b6102257874a4ea796af686de2f72cfa0452f9.tar.gz linux-75b6102257874a4ea796af686de2f72cfa0452f9.tar.bz2 linux-75b6102257874a4ea796af686de2f72cfa0452f9.zip | |
rtc: add support for Epson RTC-9701JE V4
Add support for the Epson RTC-9701JE SPI RTC device.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-r9701.c | 37 |
1 files changed, 10 insertions, 27 deletions
diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c index 926e8fda83c0..a64626a82d0b 100644 --- a/drivers/rtc/rtc-r9701.c +++ b/drivers/rtc/rtc-r9701.c @@ -1,10 +1,9 @@ -/* 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, |