[PATCH v6 6/9] ARM: vexpress: Motherboard RS1 memory map support
From: Pawel Moll <hidden>
Date: 2012-01-19 17:31:33
Also in:
linux-devicetree
Possibly related (same subject, not in this thread)
- 2012-01-30 · Re: [PATCH v6 6/9] ARM: vexpress: Motherboard RS1 memory map support · Dave Martin <hidden>
- 2012-01-30 · Re: [PATCH v6 6/9] ARM: vexpress: Motherboard RS1 memory map support · Dave Martin <hidden>
- 2012-01-19 · Re: [PATCH v6 6/9] ARM: vexpress: Motherboard RS1 memory map support · Pawel Moll <hidden>
- 2012-01-04 · Re: [PATCH v6 6/9] ARM: vexpress: Motherboard RS1 memory map support · David Vrabel <hidden>
- 2011-12-15 · [PATCH v6 6/9] ARM: vexpress: Motherboard RS1 memory map support · Pawel Moll <hidden>
On Thu, 2012-01-19 at 16:46 +0000, David Vrabel wrote:
quoted
It does for me: # zcat /proc/config.gz | grep EARLY_PRINTK CONFIG_EARLY_PRINTK=y # cat /proc/device-tree/motherboard/arm,v2m-memory-map && echo rs1 #earlyprintk needs to be on the kernel command line to enable it. Without this option it will work fine.
# cat /proc/cmdline console=ttyAMA0,38400 earlyprintk rootwait root=/dev/mmcblk0p2 mmci.fmax=12000000 debug I'll investigate the matter to the bottom, though. Your kernel config would be helpful, thanks!
It's also a problem when running as a guest under a hypervisor as there won't be any stage 2 translation table entries for non-existent peripherals. I think there needs to be someway of finding out from the DTB which UART to use.
Yess... The DT+earlyprintk problem was discussed several times already, without any happy resolution so far... Pawe?