arm: socfpga: socrates: make rtc work
This patch makes the on-board RTC work on the socfpga_socrates board.
This rtc is present on the board, but it does not work (fails with a
timeout).
This patch adds a weak pull-up on the I2C0-SCL pin connected to the m41t82
RTC on this board. While the SDA line has a pull-up on the pcb, the pull-up
on the SCL line seems to be missing. To work around this, enable the
weak-pull-up feature on this pin.
After applying this patch, the rtc timeout is gone and the 'date' command
can access the rtc chip.
Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/board/ebv/socrates/qts/iocsr_config.h b/board/ebv/socrates/qts/iocsr_config.h
index 011fa2b..18b9c6c 100644
--- a/board/ebv/socrates/qts/iocsr_config.h
+++ b/board/ebv/socrates/qts/iocsr_config.h
@@ -108,7 +108,7 @@
0x00018004,
0x06001209,
0x00004000,
- 0x20002412,
+ 0x20042412,
0x00904800,
0x00000030,
0x80000000,