linux-kernel - Re: [PATCH v1 3/3] riscv: dts: allwinner: d1: Add QSPI pins node for pinmux PC port

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Message-ID: <10311404.nUPlyArG6x@jernej-laptop>
Date:   Mon, 31 Jul 2023 00:30:39 +0200
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     linux-spi@...r.kernel.org, Maksim Kiselev <bigunclemax@...il.com>
Cc:     Maksim Kiselev <bigunclemax@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Chen-Yu Tsai <wens@...e.org>,
        Samuel Holland <samuel@...lland.org>,
        Mark Brown <broonie@...nel.org>,
        Cristian Ciocaltea <cristian.ciocaltea@...labora.com>,
        devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 3/3] riscv: dts: allwinner: d1: Add QSPI pins node for pinmux
 PC port

Dne sobota, 24. junij 2023 ob 15:16:24 CEST je Maksim Kiselev napisal(a):
> Add pinmux node that describes pins on PC port which required for
> QSPI mode.
> 
> Signed-off-by: Maksim Kiselev <bigunclemax@...il.com>
> ---
>  arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi
> b/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi index
> 1bb1e5cae602..9f754dd03d85 100644
> --- a/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi
> +++ b/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi
> @@ -131,6 +131,13 @@ uart3_pb_pins: uart3-pb-pins {
>  				pins = "PB6", "PB7";
>  				function = "uart3";
>  			};
> +
> +			/omit-if-no-ref/
> +			qspi0_pc_pins: qspi0-pc-pins {
> +				pins = "PC2", "PC3", "PC4", "PC5", 
"PC6",
> +				       "PC7";
> +				function = "spi0";
> +			};

Sorry for late review, but it seems I'm missing something. D1 manual says 
those are pins for ordinary SPI, with HOLD and WP signals. Can they be 
repurposed for quad SPI?

Best regards,
Jernej


>  		};
> 
>  		ccu: clock-controller@...1000 {