linux-kernel - Re: [PATCH 2/8] ARM: OMAP2+: Remove unconfigured midlemode for am3 lcdc

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Date:   Tue, 23 Jul 2019 14:03:12 -0500
From:   Suman Anna <s-anna@...com>
To:     Tony Lindgren <tony@...mide.com>, <linux-omap@...r.kernel.org>,
        Jyri Sarha <jsarha@...com>
CC:     Dave Gerlach <d-gerlach@...com>, Faiz Abbas <faiz_abbas@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Keerthy <j-keerthy@...com>, Nishanth Menon <nm@...com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Roger Quadros <rogerq@...com>, Tero Kristo <t-kristo@...com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/8] ARM: OMAP2+: Remove unconfigured midlemode for am3
 lcdc

+ Jyri

On 7/23/19 6:28 AM, Tony Lindgren wrote:
> We currently get a warning for lcdc because of a difference
> with dts provided configuration compared to the legacy platform
> data. This is because lcdc has SYSC_HAS_MIDLEMODE configured in
> the platform data without configuring the modes.

Hi Tony,
While I understand that you are trying to match the DT data with the
existing legacy data, do you know if there was a reason why this was
omitted in the first place? Should we be really adding the MSTANDBY_
flags and fix up the DTS node accordingly? I tried looking through the
git log, and the initial commit itself didn't add the MSTANDBY_ flags
but used the SYSC_HAS_MIDLEMODE.

Jyri,
Do you know the history?

regards
Suman

> 
> Let's fix the warning by removing SYSC_HAS_MIDLEMODE. Note that
> the am335x TRM lists SYSC_HAS_MIDLEMODE, but it is unused.



> 
> Signed-off-by: Tony Lindgren <tony@...mide.com>
> ---
>  arch/arm/mach-omap2/omap_hwmod_33xx_data.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-omap2/omap_hwmod_33xx_data.c b/arch/arm/mach-omap2/omap_hwmod_33xx_data.c
> --- a/arch/arm/mach-omap2/omap_hwmod_33xx_data.c
> +++ b/arch/arm/mach-omap2/omap_hwmod_33xx_data.c
> @@ -231,7 +231,7 @@ static struct omap_hwmod am33xx_control_hwmod = {
>  static struct omap_hwmod_class_sysconfig lcdc_sysc = {
>  	.rev_offs	= 0x0,
>  	.sysc_offs	= 0x54,
> -	.sysc_flags	= (SYSC_HAS_SIDLEMODE | SYSC_HAS_MIDLEMODE),
> +	.sysc_flags	= SYSC_HAS_SIDLEMODE,
>  	.idlemodes	= (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART),
>  	.sysc_fields	= &omap_hwmod_sysc_type2,
>  };
>