[PATCH] ARM: socfpga: Set reset-names property for &mmc

[Ahmad Fatoum]

Hello Ian,

On 01.11.21 18:40, Ian Abbott wrote:
> Since commit 90bdf1e5d1e4 ("mci: dw_mmc: match against StarFive MMC
> compatibles"), the dw_mmc driver requires a reset line called "reset".
> The slightly earlier commit a3cf324593ea ("mci: dw_mmc: add optional
> reset line") introduced the reset line support, but made it optional.

Ouch. That doesn't look intended. Perhaps it's an artifact of a rebase. :/
I've sent out a partial revert. We can still apply this patch here to
actually use the reset, but forcing platforms to specify a reset was
not my intention as described in the first commit you referenced.

> The device tree node for SoCFPGA's MMC device has the "resets" property,
> but is missing the "reset-names" property, so MMC no longer works.
> Barebox produces the error message:
> 
> ERROR: dw_mmc ff704000.dwmmc0 at ff704000.of: probe failed: Invalid argument
> 
> Add the missing "reset-names" property to the "&mmc" node in
> "arch/arm/dts/socfpga.dtsi".  It probably needs fixing in the upstream
> Linux device tree sources too!
> 
> Cc: Ahmad Fatoum <a.fatoum at pengutronix.de>
> Cc: Steffen Trumtrar <s.trumtrar at pengutronix.de>
> Signed-off-by: Ian Abbott <abbotti at mev.co.uk>
> ---
>  arch/arm/dts/socfpga.dtsi | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
> index 7789c9d3b5..56dbf0b97d 100644
> --- a/arch/arm/dts/socfpga.dtsi
> +++ b/arch/arm/dts/socfpga.dtsi
> @@ -4,6 +4,10 @@
>  	};
>  };
>  
> +&mmc {
> +	reset-names = "reset";

FWIW, this now adheres to the synopsys-dw-mshc-common binding:

Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>

> +};
> +
>  &watchdog0 {
>  	resets = <&rst L4WD0_RESET>;
>  };
> 


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