06:59 <russell--> i have an openwrt build that boots on a beagle bone black, but the same u-boot fails "Could not initialize timer" on a pocketbeagle (here's a bootlog: https://paste.debian.net/1275602/) ... any ideas what might be happening?

13:40 <zmatt> russell--: my first guess would be that it's related to the pocketbeagle not having a 32768 Hz crystal

13:40 <zmatt> so possibly some clock source is being configured incorrectly for this board

14:05 <zmatt> on the pocketbeagle the rtc osc must be disabled (RTC_OSC_REG.OSC32K_GZ = 1) and must not be selected as clock source for the rtc (RTC_OSC_REG.SEL_32KCLK_SRC != 1), timer1 (CLKSEL_TIMER1MS_CLK.CLKSEL != 4), gpio0 debounce (CLKSEL_GPIO0_DBCLK.CLKSEL != 1), or clkout2 (CM_CLKOUT_CTRL.CLKOUT2SOURCE != 0)

14:06 <zmatt> it should be noted that all of these are power-on defaults, so if they're wrong then it's because u-boot configured them wrong

14:09 <zmatt> the internal 32768 clock source (which is the main alternative to the rtc osc clock) is generated by dividing down the 192 MHz PER_CLKOUTM2, so PLL_PER needs to be correctly initialized and locked to have it available

15:55 <Guest4494> Is there a way to physically make or set the onboard eMMC flash to read-only?  IOW, set it RO in hardware, not software?

17:03 <zmatt> Guest4494: yeah, eMMC has both temporary and permanent write-protect features, both for the whole device and individual blocks