[U-Boot] [PATCH] Add ARM errata workaround 852421 and 852423 for Cortex-A17

[Fabio Estevam]

On Sun, Apr 16, 2017 at 7:50 PM, Nisal Menuka <nisalmenuka23 at gmail.com> wrote:
> ARM errata 852421 and 852423 applies to r1p0, r1p1 and r1p2
> revisions of Cortex-A17 processors. These workarounds
> exist in Linux kernel and I thought it would be better
> to add them in to U-Boot.
>
> Signed-off-by: Nisal Menuka <nisalmenuka23 at gmail.com>
> ---
>  arch/arm/cpu/armv7/start.S | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
> index 1a6aee9..f06fd28 100644
> --- a/arch/arm/cpu/armv7/start.S
> +++ b/arch/arm/cpu/armv7/start.S
> @@ -283,6 +283,18 @@ skip_errata_621766:
>  skip_errata_725233:
>  #endif
>
> +#ifdef CONFIG_ARM_ERRATA_852421
> +       mrc     p15, 0, r0, c15, c0, 1  @ read diagnostic register
> +       orr     r0, r0, #1 << 24        @ set bit #24
> +       mcr     p15, 0, r0, c15, c0, 1  @ write diagnostic register
> +#endif

No entries to arch/arm/Kconfig ?