Activity
From 09/05/2013 to 10/04/2013
09/19/2013
- JC 03:00 PM Software Development: RE: Writing UBIFS rootfs to AM3354 with 512MB NAND
- Thanks for the procedure. In case you weren't aware I wrote up a guide on doing this without the kernel being stored in the ubifs partition. [[UBIFS_Nand_Boot]]
I'll definitely try to take some time to add your method as an alternati... - MK 02:41 PM Software Development: RE: Writing UBIFS rootfs to AM3354 with 512MB NAND
- The procedure is simple - I create a UBI image (mkfs.ubifs & ubinize) with uImage and rootfile system volumes and programmed it into flash. There are lots of places on the web that explain this process, and once you have a UBI image you...
09/17/2013
- JC 02:50 PM Software Development: RE: Writing UBIFS rootfs to AM3354 with 512MB NAND
- Michael,
I've added your changes including my alternative change to a test branch on my machine. If you could test my alternative change I'll happily post it up on our site.
Thanks - JC 02:48 PM Software Development: RE: Writing UBIFS rootfs to AM3354 with 512MB NAND
- Ok cool. We've never tried storing the kernel in a ubifs partition. If you have it working I'd be interested in your procedure.
- MK 02:31 PM Software Development: RE: Writing UBIFS rootfs to AM3354 with 512MB NAND
- JC 02:17 PM Software Development: RE: Writing UBIFS rootfs to AM3354 with 512MB NAND
- Do you have a reference for your first change? Or did you find this through trial and error?
- JC 02:14 PM Software Development: RE: Writing UBIFS rootfs to AM3354 with 512MB NAND
- Michael,
You should be able to replace your second change with: - MK 01:41 PM Software Development: RE: Writing UBIFS rootfs to AM3354 with 512MB NAND
- To boot from UBI with the 512MB NAND, I had to modify the 2013.01 branch bootloader:
09/09/2013
- MK 03:40 PM Software Development: RE: Yocto in the future?
- One other thing... you will need to set defconfig to the appropriate config file - it is easiest just to copy this from the repo to meta-mityarm/recipes-kernel/linux/linux-yocto-custom/defconfig .
Also, I set CONFIG_LEGACY_PTYS=y in ... - MK 02:48 PM Software Development: RE: Yocto in the future?
- Sure. First I should make clear the Yocto version - it is *dylan*-9.0.0 , not denzil. This is also Yocto/Poky... lately Yocto has been claiming Angstrom and Linaro, though I can't say I completly get the nuance here... if anyone can ex...
- JC 08:42 AM Software Development: RE: Yocto in the future?
- Thanks Michael for the update. Would you be willing to share the steps you did to get it working or maybe just the working .bb files?
Thanks
Jonathan
09/07/2013
- MK 04:32 PM Software Development: RE: Yocto in the future?
- 3.2 Kernel appears to run fine under Yocto (denzil-9.0.0).
- MW 07:35 AM Software Development: RE: High Latency for GPIO Interrupts in 3.2 Kernel
- Thanks Michael,
We'll get it applied in the local tree (which came from TI, really).
Sorry for the inconvenience.
-Mike
- MK 03:37 AM Software Development: RE: High Latency for GPIO Interrupts in 3.2 Kernel
- This is a bug in the kernel. Lines 215-219 of the file arch/arm/mach-omap2/irq.c should be modified:
09/06/2013
- MK 11:25 PM Software Development: RE: High Latency for GPIO Interrupts in 3.2 Kernel
- The GPIO interrupt is on GPIO bank 0. Is there any chance that there is power management being applied to the GPIO or the GPIO 0 bank clock (clk_rc32k_ck) has changed? The fact that the latency goes down when I load the processor is aw...
- MK 11:06 PM Software Development: RE: High Latency for GPIO Interrupts in 3.2 Kernel
- Kernel Module.
- MW 08:12 PM Software Development: RE: High Latency for GPIO Interrupts in 3.2 Kernel
- Are you handling the interrupts in a kernel module or via the gpio sysfs file hooks?
- Just switched over to the 3.2 Kernel from 3.1 to support programming of the 512MB flash, and the latency for a GPIO Interrupt has gone through the roof - from ~20usec on 3.1 to >400usec on 3.2. Kind of odd: 3.2 the interrupt tends to ge...