On Mon, 14 Jul 2014, Tony Lindgren wrote:
- Paul Walmsley paul@pwsan.com [140714 10:32]:
On Mon, 7 Jul 2014, Tony Lindgren wrote:
With v3.16-rc4 the PM features for omap3 should be working finally for device tree based booting. At lest beaglexm and 3xxevm should work.
Maybe you are using legacy booting path to idle the UARTs still?
FYI, I'm doing this to find the UART entries:
uarts=$(find /sys/class/tty/ttyO*/device/power/ -type d) for uart in $uarts; do echo 3000 > $uart/autosuspend_delay_ms done
uarts=$(find /sys/class/tty/ttyO*/power/ -type d) for uart in $uarts; do echo enabled > $uart/wakeup echo auto > $uart/control done
echo 1 > /sys/kernel/debug/pm_debug/enable_off_mode
OK thanks, I'll take a close look at it. It's not using the legacy paths, but based on a glance at the 37xxevm logs, it looks like the bus address of the UART isn't right.
Hmm for which UART? I'm using ttyO2 on my 37xxevm FYI, it can be selected on the board based on some switch settings. I may have patched my u-boot for that too but don't remember for sure.
Sorry, I should have been more specific. The path name that the script here was using to write to the 'wakeup' file contained the base address. It's probably just best to set them via /sys/class/tty as you do.
- Paul