[U-Boot] [PATCH] arm: ls1021a: Ensure LS1021 ARM Generic Timer CompareValue Set 64-bit

[York Sun <yorksun@freescale.com>]

On 07/15/2015 12:13 AM, Alison Wang wrote:
> This patch addresses a problem mentioned recently on this mailing list:
> [1].
> 
> In that posting a LS1021 based system was locking up at about 5 minutes
> after boot, but the problem was mysteriously related to the toolchain
> used for building u-boot.  Debugging the problem reveals a stuck
> interrupt 29 on the GIC.
> 
> It appears Freescale's LS1021 support in u-boot erroneously sets the
> 64-bit ARM generic PL1 physical time CompareValue register to all-ones
> with a 32-bit value.  This causes the timer compare to fire 344 seconds
> after u-boot configures it.  Depending on how fast u-boot gets the
> kernel booted, this amounts to about 5-minutes of Linux uptime before
> locking up.
> 
> Apparently the bug is masked by some toolchains.  Perhaps this is
> explained by default compiler options, word sizes, or binutils versions.
> At any rate this patch makes the manipulation explicitly 64-bit which
> alleviates the issue.
> 
> [1]
> https://lists.yoctoproject.org/pipermail/meta-freescale/2015-June/014400.html
> 
> Signed-off-by: Chris Kilgour <techie@whiterocker.com>
> Signed-off-by: Alison Wang <alison.wang@freescale.com>
> ---

Applied to fsl-qoriq master. Thanks.

York