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.goldschm...@gmail.com>
---
board/ebv/socrates/qts/iocsr_config.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/board/ebv/socrates/qts/iocsr_config.h
b/board/ebv/socrates/qts/iocsr_config.h
index 011fa2bac3..18b9c6ce4d 100644
--- a/board/ebv/socrates/qts/iocsr_config.h
+++ b/board/ebv/socrates/qts/iocsr_config.h
@@ -108,7 +108,7 @@ const unsigned long iocsr_scan_chain2_table[] = {
0x00018004,
0x06001209,
0x00004000,
- 0x20002412,
+ 0x20042412,
0x00904800,
0x00000030,
0x80000000,
--
2.17.1
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