[U-Boot] [PATCH] arm: mvebu: increase delay after setting ddr3 training patterns
The mv78260 needs atleast 10ms after setting the ddr3 training patterns or else the cpu will hang.
This patch increases said delay to 20ms just to be safe.
Signed-off-by: Anton Schubert anton.schubert@gmx.de Cc: Stefan Roese sr@denx.de Cc: Luka Perkov luka.perkov@sartura.hr --- drivers/ddr/mvebu/ddr3_hw_training.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/ddr/mvebu/ddr3_hw_training.c b/drivers/ddr/mvebu/ddr3_hw_training.c index a8c5e6a..c9c9272 100644 --- a/drivers/ddr/mvebu/ddr3_hw_training.c +++ b/drivers/ddr/mvebu/ddr3_hw_training.c @@ -674,7 +674,7 @@ int ddr3_load_patterns(MV_DRAM_INFO *dram_info, int resume)
reg_write(REG_DRAM_TRAINING_ADDR, reg);
- udelay(100); + mdelay(20);
/* Check if Successful */ if (reg_read(REG_DRAM_TRAINING_ADDR) &
Hi Anton,
On 15.07.2015 11:12, Anton Schubert wrote:
The mv78260 needs atleast 10ms after setting the ddr3 training patterns
s/atleast/at least
or else the cpu will hang.
Is this documented somewhere? Or just a value from your experiments / tests?
This patch increases said delay to 20ms just to be safe.
Signed-off-by: Anton Schubert anton.schubert@gmx.de Cc: Stefan Roese sr@denx.de Cc: Luka Perkov luka.perkov@sartura.hr
In general I'm fine with this patch. But I noticed that this patch breaks booting on my AXP board. I then remembered another issue I has with timer functions in SPL on MVEBU (A38x). The timer functionality is not enabled at all at this early boot time. I'll send another patch shortly. Please give it a try and let me know if this works. And if you still need this delay increasing patch here.
Thank, Stefan
Hi Stefan,
Your timer patch fixes the booting problems for me so this delay isn't necessary anymore.
Thanks, Anton
Hi Anton, hi Stefan,
On Wed, Jul 15, 2015 at 04:47:55PM +0200, Anton Schubert wrote:
Hi Stefan,
Your timer patch fixes the booting problems for me so this delay isn't necessary anymore.
I've pushed the two patches from you guys to marvell/master:
http://git.denx.de/?p=u-boot/u-boot-marvell.git;a=summary
I'll leave them there for some time before sending pull request.
Luka
Hi Luka,
My Patch isn't necessary anymore and as Stefan said potentially breaking on other chip versions.
Anton
Hi Anton,
On Wed, Jul 15, 2015 at 05:00:21PM +0200, Anton Schubert wrote:
My Patch isn't necessary anymore and as Stefan said potentially breaking on other chip versions.
I think everything is merged correctly as was intended. Please check.
Luka
Hi Luka
2015-07-15 17:04 GMT+02:00 Luka Perkov luka.perkov@sartura.hr:
I think everything is merged correctly as was intended. Please check.
Is correct.
Thanks, Anton
Hi Luka,
On 15.07.2015 16:56, Luka Perkov wrote:
On Wed, Jul 15, 2015 at 04:47:55PM +0200, Anton Schubert wrote:
Hi Stefan,
Your timer patch fixes the booting problems for me so this delay isn't necessary anymore.
I've pushed the two patches from you guys to marvell/master:
http://git.denx.de/?p=u-boot/u-boot-marvell.git;a=summary
I'll leave them there for some time before sending pull request.
Thanks.
Could you please add the A38x SPL patch series (with the SERDES/PHY and DDR setup) as well now that the merge window has opened? Just let me know if it does not apply clean any more. I'll respin the patchset then.
Thanks, Stefan
Hi Stefan,
On Wed, Jul 15, 2015 at 05:00:44PM +0200, Stefan Roese wrote:
Your timer patch fixes the booting problems for me so this delay isn't necessary anymore.
I've pushed the two patches from you guys to marvell/master:
http://git.denx.de/?p=u-boot/u-boot-marvell.git;a=summary
I'll leave them there for some time before sending pull request.
Thanks.
Could you please add the A38x SPL patch series (with the SERDES/PHY and DDR setup) as well now that the merge window has opened? Just let me know if it does not apply clean any more. I'll respin the patchset then.
Can you please respin the patchset? Thanks!
Luka
participants (3)
-
Anton Schubert -
Luka Perkov -
Stefan Roese