Messages in this thread | | | Date | Sat, 6 Aug 2011 23:27:06 +0200 | Subject | AT91SAM9261EK kit is broken, commit bd60299 has broken it | From | Remy Bohmer <> |
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Hi Jean-Christophe,
Currently the Atmel AT91SAM9261-EK kit is broken within Linux 3.0, 3.01 and latest git.
These are the symptoms: * Booting stops if LCD driver is enabled in the kernel. It stops within the probe of the LCD driver. (at a msleep(10)) * schedule_timeout is broken. * The jiffies based sched_clock does not run properly and stalls during boot, before the LCD driver is being initialised. (You can see this with printk-timestamps enabled) * When LCD driver disabled, boards boots up to a prompt, but every tool (e.g. 'top') that does a nanosleep syscall stays blocked in the kernel.
After bisecting the tree searching for the offending commit, I came to the following patch, after reverting it in mainline, everything works again as normal. I do not see immediately what is wrong with this commit, do you have an idea? Otherwise I will dig deeper in this commit...
bd60299594fb1d28ae66563c9e76a0b89b0412cf is the first bad commit commit bd60299594fb1d28ae66563c9e76a0b89b0412cf Author: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Date: Wed Feb 2 07:27:07 2011 +0100
at91: switch to CLKDEV_LOOKUP
we do not change the clock naming convention so does not need to switch the AVR32 yet
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Patrice Vilchez <patrice.vilchez@atmel.com>
Kind regards,
Remy
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