Activity
From 08/12/2013 to 09/10/2013
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...
09/04/2013
- MK 03:23 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND
- Tim,
No worries! I appreciate you getting the 512MB to work!
I downloaded from three different places on the CL website, this thread, the u-boot wiki page, and the link you posted. All three binaries were the same - no joy.
Mike - TI 03:15 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND
- Mike
Sorry about that!
I did add a board type for this configuration, but didn't really document it very well. :(
Use the mityarm335x_4kpage configuration to define the MITYARM_4K_PAGE_NAND preprocessor macro.
The goal is eventuall... - MK 02:39 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND
- Jonathan,
I found the problem - looks like a bug in your u-boot code. For some reason, the MITYARM_4K_PAGE_NAND environment variable was not getting set. To the top of include/configs/mityarm335x.h I added:
@#define MITYARM_4K_PA... - JC 02:21 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND
- Jumpers only affect where the board looks for bootup code. The ubifs wiki page has my jumper config for booting from nand vs sd card.
- JC 02:19 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND
- Mike can you run "nand bad"?
Did you use an older u-boot before you got the updated one? Its possible the older u-boot already marked all the blocks bad. To clear the bad blocks you need to run "nand scrub.chip". This command will w... - MK 02:05 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND
- Jonathan,
Thanks. Yes, my suspicion is that I don't have the correct u-boot. I've built u-boot from source, the u-boot-2013.01 branch, and still not working. The results (and the uboot version - 2013.01.01-g6818f7c) are identical t... - JC 09:13 AM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND
- Mike,
I've added the correct mtdparts and other information on flashing the nand in the following wiki: http://support.criticallink.com/redmine/projects/armc8-platforms/wiki/UBIFS_Nand_Boot.
h3. U-boot
Though it sounds like you ...
09/03/2013
- MK 09:17 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND
- I am still having trouble programming the MLO and uboot into NAND from u-boot on an AM3354.
I've tried the MLO, uEnv.txt, and uboot.img posted for the 512M device, and here is what a boot into uboot from an SD Card looks like:
@U-B...
08/19/2013
- JC 02:19 PM Software Development: RE: NAND memory map question
- Thanks for the status update. Let us know how it turns out.
-Jonathan -
09:17 AM
Software Development: RE: NAND memory map question
- Jonathan,
Thanks much as your last two posts help tremendously. Our biggest concern with using NAND for both the u-boot images
(and our own) was having a block go bad. We did not want our units to end up dying in the field bec...
08/16/2013
- JC 01:29 PM Software Development: RE: NAND memory map question
- So looking in the following file you can see that there is support in the MLO for having a redundant environment partition, although we don't use it. It would probably not be difficult for someone to also add a redundant u-boot partitio...
- JC 01:08 PM Software Development: RE: NAND memory map question
- John,
Thanks for the clarification, I was looking in the kernel repository not the U-boot one.
I am not too familiar with the u-boot mlo implementation. I'm not sure what it would take to have the MLO support two locations for the... -
11:53 AM
Software Development: RE: NAND memory map question
- Hi Jonathan,
Here is the wiki for the AM335x Uboot users guide:
http://processors.wiki.ti.com/index.php/AM335x_U-Boot_User%27s_Guide#SPI_2
The mityarm335x.h is from the latest git repo as described on your wiki:
http://supp... - JC 11:15 AM Software Development: RE: NAND memory map question
- You can read up on the TI processor ROM boot process in section 26 of the AM335x Technical Reference Manual. http://www.ti.com/lsds/ti/arm/sitara_arm_cortex_a_processor/sitara_arm_cortex_a8/am335x_arm_cortex_a8/tech_docs.page?rootFamily...
- JC 11:10 AM Software Development: RE: NAND memory map question
- Could you please provide a reference to these TI wiki pages?
What git repo did you locate the referenced mityarm335x.h file?
Does this wiki page help? http://support.criticallink.com/redmine/projects/armc8-platforms/wiki/UBIFS_Nand...
08/15/2013
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04:48 PM
Software Development: NAND memory map question
- Hi,
We are currently running the AM3352 cpu module and was hoping for some clarification on where everything sits in
NAND as certain comments in files don't seem to line up with TI's wiki pages or the mityarm335x.h file
in /inc...