13 Mar
2019
13 Mar
'19
6:47 a.m.
On 12.03.19 22:01, Simon Goldschmidt wrote:
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
Thanks, Stefan