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 <[email protected]> Reviewed-by: Stefan Roese <[email protected]>
lukasauer · Apr 24, 2019 · d1aa159 · d1aa159
1 parent 4e829e9
commit d1aa159
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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,