AM335x, early printk
Hi,
I activated:
[*] Kernel low-level debugging functions
Kernel low-level debugging port (Kernel low-level debugging
messages via OMAP2PLUS UART)
Low-level debug console UART (AM33XX UART1)
[*] Early printk
and booted my am335x-evm.
I haven't seen any "early" output in the decompressor or during the kernel boot. I believe that all I saw is just regular ttyO0 output. I saw also:
|44e09000.serial: ttyO0 at MMIO 0x44e09000 (irq = 88) is a OMAP UART0 |console [ttyO0] enabled
and I would also except the bootconsole (if any) to be deactivated here.
What am I missing?
Sebastian
Hi!
You need to add 'earlyprintk' in the kernel command line, given (I suppose) by U-Boot.
I hope this helps!
Jean
Quoted 24 lines · Sebastian Andrzej Siewior
Hi,
I activated:
[*] Kernel low-level debugging functions
Kernel low-level debugging port (Kernel low-level debugging
messages via OMAP2PLUS UART)
Low-level debug console UART (AM33XX UART1)
[*] Early printkand booted my am335x-evm.
I haven't seen any "early" output in the decompressor or during the kernel boot. I believe that all I saw is just regular ttyO0 output. I saw also:
|44e09000.serial: ttyO0 at MMIO0x44e09000(irq = 88) is a OMAP UART0 |console [ttyO0] enabled
and I would also except the bootconsole (if any) to be deactivated here.What am I missing?
Sebastian
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Quoted 1 line · Jean Pihet
Hi!
Hi Jean,
Quoted 2 lines
You need to add 'earlyprintk' in the kernel command line, given (I suppose) by U-Boot.
Ah, good hint.
Quoted 2 lines
I hope this helps!
Yes. I do not see the decompress messages but I have an early console later on. Unfortunately it stops now right at the serial core:
|pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568 |Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
Quoted 2 lines
Jean
Sebastian
Hi Sebastian,
Quoted 5 lines · Sebastian Andrzej Siewior
Yes. I do not see the decompress messages but I have an early console later on. Unfortunately it stops now right at the serial core:
|pinctrl-single 44e10800.pinmux: 142 pins at pa
f9e10800size 568 |Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
I vaguely remember facing a similar issue on it's yet to be born sibling while trying to woke it up in the womb, see if placing dtb at a different location helps (probably so that images won't get corrupted)
Regards
Afzal
Hi Sebastian,
Quoted 11 lines · Sebastian Andrzej Siewior
Quoted 1 line · Jean Pihet
Hi!
Hi Jean,
Quoted 2 lines
You need to add 'earlyprintk' in the kernel command line, given (I suppose) by U-Boot.
Ah, good hint.
Quoted 1 line
Quoted 7 lines
Quoted 1 line
I hope this helps!
Yes. I do not see the decompress messages but I have an early console later on. Unfortunately it stops now right at the serial core:
|pinctrl-single 44e10800.pinmux: 142 pins at pa
f9e10800size 568 |Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
I guess you are missing the following series from Rajendra.
http://www.mail-archive.com/[email protected]/msg92515.html
Thanks and regards,
Lokesh
Quoted 10 lines
Quoted 3 lines
Jean
Sebastian
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Hi Sebastian,
Quoted 9 lines · Lokesh Vutla
Quoted 5 lines
Yes. I do not see the decompress messages but I have an early console later on. Unfortunately it stops now right at the serial core:
|pinctrl-single 44e10800.pinmux: 142 pins at pa
f9e10800size 568 |Serial: 8250/16550 driver, 4 ports, IRQ sharing enabledI guess you are missing the following series from Rajendra.
I think Lokesh's suggestion is more likely to help your case than mine.
Regards
Afzal