tree d203532c936bbc2c0a16652f07c86bb1ba931939
parent 800fcf06822f69fcc30e9eb4149bab532c4dce1d
author Jan Kundrát <jan.kundrat@cesnet.cz> 1510597924 +0100
committer Jan Kundrát <jan.kundrat@cesnet.cz> 1511496189 +0100

clearfog: Enable MAX14830 quad UART

I had to be very careful when it came to clock naming; simply using
"oscillator" actually mangled the "refclk" on the SoC, which had a nice
side effect of confusing the watchdog timer. Sweet times.

Another funny point were the interrupts. The Mikrobus INT line is
actually pulled *down* by the SoC. The only accessible GPIOs with a
pull-up are J18 (unpopulated) and the UART's TX. Let's just reconfigure
MPP25 (formerly UART TX) for interrupts; this involves the pinctrl
dance, too.

Change-Id: I8a0adb3d15586797ffe6d95fda2365df87ba9e36