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>
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@ -1,10 +1,9 @@
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/* drivers/rtc/rtc-r9701.c
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*
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/*
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* Driver for Epson RTC-9701JE
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*
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* Copyright (C) 2008 Magnus Damm
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*
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* Based on drivers/rtc/rtc-max6902.c
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* Based on rtc-max6902.c
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*
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* Copyright (C) 2006 8D Technologies inc.
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* Copyright (C) 2004 Compulab Ltd.
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@ -72,13 +71,12 @@ static int read_regs(struct device *dev, unsigned char *regs, int no_regs)
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static int r9701_get_datetime(struct device *dev, struct rtc_time *dt)
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{
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struct spi_device *spi = to_spi_device(dev);
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unsigned long time;
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int ret;
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unsigned char buf[] = { RSECCNT, RMINCNT, RHRCNT,
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RDAYCNT, RMONCNT, RYRCNT };
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ret = read_regs(&spi->dev, buf, ARRAY_SIZE(buf));
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ret = read_regs(dev, buf, ARRAY_SIZE(buf));
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if (ret)
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return ret;
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@ -96,17 +94,7 @@ static int r9701_get_datetime(struct device *dev, struct rtc_time *dt)
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* according to the data sheet. make sure they are valid.
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*/
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ret = rtc_valid_tm(dt);
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if (ret)
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return ret;
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/* don't bother with yday, wday and isdst.
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* let the rtc core calculate them for us.
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*/
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rtc_tm_to_time(dt, &time);
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rtc_time_to_tm(time, dt);
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return 0;
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return rtc_valid_tm(dt);
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}
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static int r9701_set_datetime(struct device *dev, struct rtc_time *dt)
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@ -118,12 +106,12 @@ static int r9701_set_datetime(struct device *dev, struct rtc_time *dt)
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return -EINVAL;
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ret = write_reg(dev, RHRCNT, BIN2BCD(dt->tm_hour));
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ret |= write_reg(dev, RMINCNT, BIN2BCD(dt->tm_min));
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ret |= write_reg(dev, RSECCNT, BIN2BCD(dt->tm_sec));
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ret |= write_reg(dev, RDAYCNT, BIN2BCD(dt->tm_mday));
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ret |= write_reg(dev, RMONCNT, BIN2BCD(dt->tm_mon + 1));
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ret |= write_reg(dev, RYRCNT, BIN2BCD(dt->tm_year - 100));
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ret |= write_reg(dev, RWKCNT, 1 << dt->tm_wday);
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ret = ret ? ret : write_reg(dev, RMINCNT, BIN2BCD(dt->tm_min));
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ret = ret ? ret : write_reg(dev, RSECCNT, BIN2BCD(dt->tm_sec));
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ret = ret ? ret : write_reg(dev, RDAYCNT, BIN2BCD(dt->tm_mday));
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ret = ret ? ret : write_reg(dev, RMONCNT, BIN2BCD(dt->tm_mon + 1));
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ret = ret ? ret : write_reg(dev, RYRCNT, BIN2BCD(dt->tm_year - 100));
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ret = ret ? ret : write_reg(dev, RWKCNT, 1 << dt->tm_wday);
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return ret;
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}
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@ -146,10 +134,6 @@ static int __devinit r9701_probe(struct spi_device *spi)
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dev_set_drvdata(&spi->dev, rtc);
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spi->mode = SPI_MODE_3;
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spi->bits_per_word = 8;
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spi_setup(spi);
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tmp = R100CNT;
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res = read_regs(&spi->dev, &tmp, 1);
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if (res || tmp != 0x20) {
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@ -171,7 +155,6 @@ static int __devexit r9701_remove(struct spi_device *spi)
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static struct spi_driver r9701_driver = {
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.driver = {
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.name = "rtc-r9701",
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.bus = &spi_bus_type,
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.owner = THIS_MODULE,
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},
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.probe = r9701_probe,
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