[PATCH] sunxi: don't define MACPWR and SATAPWR to empty strings

[Andre Przywara]

On 18/01/2021 00:18, Peter Robinson wrote:

Hi Peter,

> There's checks in board/sunxi/board.c if either MACPWR or SATAPWR are
> defined and they are defined by default to a empty string which means
> on vast majority of AllWinner boards when they're not required the
> code is still run and with SATAPWR we even get an unnecessary 500ms
> delay booting. So let's not define a default for these options so the
> code is only run for boards that need it.
> 
> Signed-off-by: Peter Robinson <pbrobinson at gmail.com>
> ---
>  arch/arm/mach-sunxi/Kconfig | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
> index 49ef217f08..a566e10315 100644
> --- a/arch/arm/mach-sunxi/Kconfig
> +++ b/arch/arm/mach-sunxi/Kconfig
> @@ -578,7 +578,6 @@ config OLD_SUNXI_KERNEL_COMPAT
>  
>  config MACPWR
>  	string "MAC power pin"
> -	default ""

But that doesn't really help, does it? The kernel Kconfig documentation
doesn't mention this explicitly, but the implicit default for strings is
actually "", so I still see CONFIG_MACPWR="" in my .config, even after
your patch. And consequently I see all the code still being executed.

I made a patch the does the check in the board.c, I would be grateful if
you could test this.

Cheers,
Andre

>  	help
>  	  Set the pin used to power the MAC. This takes a string in
> the format understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of
> port H. @@ -969,7 +968,6 @@ endchoice
>  
>  config SATAPWR
>  	string "SATA power pin"
> -	default ""
>  	help
>  	  Set the pins used to power the SATA. This takes a string
> in the format understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of
>