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path: root/drivers/rtc/mc13783-rtc.c
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Diffstat (limited to 'drivers/rtc/mc13783-rtc.c')
-rw-r--r--drivers/rtc/mc13783-rtc.c43
1 files changed, 37 insertions, 6 deletions
diff --git a/drivers/rtc/mc13783-rtc.c b/drivers/rtc/mc13783-rtc.c
index 35b1b8b..b6e1501 100644
--- a/drivers/rtc/mc13783-rtc.c
+++ b/drivers/rtc/mc13783-rtc.c
@@ -24,34 +24,50 @@
#include <rtc.h>
#include <spi.h>
+static struct spi_slave *slave;
+
int rtc_get(struct rtc_time *rtc)
{
u32 day1, day2, time;
u32 reg;
int err, tim, i = 0;
- spi_select(1, 0, SPI_MODE_2 | SPI_CS_HIGH);
+ if (!slave) {
+ /* FIXME: Verify the max SCK rate */
+ slave = spi_setup_slave(1, 0, 1000000,
+ SPI_MODE_2 | SPI_CS_HIGH);
+ if (!slave)
+ return -1;
+ }
+
+ if (spi_claim_bus(slave))
+ return -1;
do {
reg = 0x2c000000;
- err = spi_xfer(0, 32, (uchar *)&reg, (uchar *)&day1);
+ err = spi_xfer(slave, 32, (uchar *)&reg, (uchar *)&day1,
+ SPI_XFER_BEGIN | SPI_XFER_END);
if (err)
return err;
reg = 0x28000000;
- err = spi_xfer(0, 32, (uchar *)&reg, (uchar *)&time);
+ err = spi_xfer(slave, 32, (uchar *)&reg, (uchar *)&time,
+ SPI_XFER_BEGIN | SPI_XFER_END);
if (err)
return err;
reg = 0x2c000000;
- err = spi_xfer(0, 32, (uchar *)&reg, (uchar *)&day2);
+ err = spi_xfer(slave, 32, (uchar *)&reg, (uchar *)&day2,
+ SPI_XFER_BEGIN | SPI_XFER_END);
if (err)
return err;
} while (day1 != day2 && i++ < 3);
+ spi_release_bus(slave);
+
tim = day1 * 86400 + time;
to_tm(tim, rtc);
@@ -65,16 +81,31 @@ void rtc_set(struct rtc_time *rtc)
{
u32 time, day, reg;
+ if (!slave) {
+ /* FIXME: Verify the max SCK rate */
+ slave = spi_setup_slave(1, 0, 1000000,
+ SPI_MODE_2 | SPI_CS_HIGH);
+ if (!slave)
+ return;
+ }
+
time = mktime(rtc->tm_year, rtc->tm_mon, rtc->tm_mday,
rtc->tm_hour, rtc->tm_min, rtc->tm_sec);
day = time / 86400;
time %= 86400;
+ if (spi_claim_bus(slave))
+ return;
+
reg = 0x2c000000 | day | 0x80000000;
- spi_xfer(0, 32, (uchar *)&reg, (uchar *)&day);
+ spi_xfer(slave, 32, (uchar *)&reg, (uchar *)&day,
+ SPI_XFER_BEGIN | SPI_XFER_END);
reg = 0x28000000 | time | 0x80000000;
- spi_xfer(0, 32, (uchar *)&reg, (uchar *)&time);
+ spi_xfer(slave, 32, (uchar *)&reg, (uchar *)&time,
+ SPI_XFER_BEGIN | SPI_XFER_END);
+
+ spi_release_bus(slave);
}
void rtc_reset(void)