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>
diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c
index 926e8fd..a64626a 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 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 @@
* 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 @@
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 @@
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 struct spi_driver r9701_driver = {
.driver = {
.name = "rtc-r9701",
- .bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = r9701_probe,