[RFC v5.1 9/9] [DON'T APPLY] cache: sifive-ccache: add cache flushing capability

[Arnd Bergmann]

On Tue, Jan 3, 2023, at 22:04, Conor Dooley wrote:
> From: Daire McNamara <daire.mcnamara at microchip.com>
>
> SiFive L2 cache controller can flush L2 cache. Expose this capability via
> driver.
>
> Signed-off-by: Daire McNamara <daire.mcnamara at microchip.com>
> [Conor: rebase on top of move to cache subsystem]
> Signed-off-by: Conor Dooley <conor.dooley at microchip.com>
> ---
> This commit needs more work, and a way to enable it from errata. I've
> not gone and done this as PolarFire SoC has archid etc all set to zero.
> So we need to go figure out a workaround for this, before adding in
> errata enabling code for this. I've included it here as a second user of
> the cache management stuff, since what's currently upstream for the
> ccache driver does not do any cache management.
> ---
>  drivers/cache/sifive_ccache.c | 45 +++++++++++++++++++++++++++++++++++
>  1 file changed, 45 insertions(+)

My feeling here is that the cacheflush code is unrelated to the
EDAC code and it should just be a separate file. From what I can
tell, all of the existing contents of this file can simply
get merged into drivers/edac/sifive_edac.c, with the newly
added code becoming a standalone driver.

     Arnd