linux-kernel - Re: [PATCH v2,1/5] powerpc: 85xx: make FSL_85XX_CACHE

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Message-ID: <36961f9d8c533d8b576043a2c6fc4859accfd9f1.camel@buserror.net>
Date:   Wed, 15 Apr 2020 13:53:48 -0500
From:   Scott Wood <oss@...error.net>
To:     Wang Wenhu <wenhu.wang@...o.com>, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, christophe.leroy@....fr,
        linuxppc-dev@...ts.ozlabs.org
Cc:     kernel@...o.com, Michael Ellerman <mpe@...erman.id.au>
Subject: Re: [PATCH v2,1/5] powerpc: 85xx: make FSL_85XX_CACHE_SRAM
 configurable

On Wed, 2020-04-15 at 08:24 -0700, Wang Wenhu wrote:
> Enable FSL_85XX_CACHE_SRAM selection. On e500 platforms, the cache
> could be configured and used as a piece of SRAM which is hignly
> friendly for some user level application performances.
> 
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Christophe Leroy <christophe.leroy@....fr>
> Cc: Scott Wood <oss@...error.net>
> Cc: Michael Ellerman <mpe@...erman.id.au>
> Cc: linuxppc-dev@...ts.ozlabs.org
> Signed-off-by: Wang Wenhu <wenhu.wang@...o.com>
> ---
> Changes since v1:
>  * None
> ---
>  arch/powerpc/platforms/85xx/Kconfig    | 2 +-
>  arch/powerpc/platforms/Kconfig.cputype | 5 +++--
>  2 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/powerpc/platforms/85xx/Kconfig
> b/arch/powerpc/platforms/85xx/Kconfig
> index fa3d29dcb57e..6debb4f1b9cc 100644
> --- a/arch/powerpc/platforms/85xx/Kconfig
> +++ b/arch/powerpc/platforms/85xx/Kconfig
> @@ -17,7 +17,7 @@ if FSL_SOC_BOOKE
>  if PPC32
>  
>  config FSL_85XX_CACHE_SRAM
> -	bool
> +	bool "Freescale 85xx Cache-Sram"
>  	select PPC_LIB_RHEAP
>  	help
>  	  When selected, this option enables cache-sram support

NACK

As discussed before, the driver that uses this API should "select" this
symbol.

-Scott