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arm: socfpga: socrates: make rtc work

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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>
This commit is contained in:
Simon Goldschmidt 2019-03-28 21:11:50 +01:00 committed by Marek Vasut
parent 4e829e9841
commit d1aa159d99
1 changed files with 1 additions and 1 deletions
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2
board/ebv/socrates/qts/iocsr_config.h
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@ -108,7 +108,7 @@ const unsigned long iocsr_scan_chain2_table[] = {
0x00018004,
0x06001209,
0x00004000,
0x20002412,
0x20042412,
0x00904800,
0x00000030,
0x80000000,