linux-kernel - RE: [EXT] [PATCH v2 04/16] ARM: dts: ls1021a-qds: Add node for QSPI flash

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Date:   Fri, 1 Oct 2021 05:24:20 +0000
From:   Kuldeep Singh <kuldeep.singh@....com>
To:     Leo Li <leoyang.li@....com>, Shawn Guo <shawnguo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Oleksij Rempel <linux@...pel-privat.de>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Leo Li <leoyang.li@....com>
Subject: RE: [EXT] [PATCH v2 04/16] ARM: dts: ls1021a-qds: Add node for QSPI
 flash

Hi Leo,

> -----Original Message-----
> From: Li Yang <leoyang.li@....com>
> Sent: Friday, October 1, 2021 5:34 AM
> To: Shawn Guo <shawnguo@...nel.org>; Rob Herring
> <robh+dt@...nel.org>; devicetree@...r.kernel.org; Oleksij Rempel
> <linux@...pel-privat.de>; linux-arm-kernel@...ts.infradead.org; linux-
> kernel@...r.kernel.org
> Cc: Leo Li <leoyang.li@....com>
> Subject: [EXT] [PATCH v2 04/16] ARM: dts: ls1021a-qds: Add node for QSPI
> flash
> 
> Caution: EXT Email
> 
> Add the missing node for qspi flash.
> 
> Signed-off-by: Li Yang <leoyang.li@....com>
> ---
>  arch/arm/boot/dts/ls1021a-qds.dts | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/ls1021a-qds.dts
> b/arch/arm/boot/dts/ls1021a-qds.dts
> index e2aa569ff404..522e1dc51059 100644
> --- a/arch/arm/boot/dts/ls1021a-qds.dts
> +++ b/arch/arm/boot/dts/ls1021a-qds.dts
> @@ -286,6 +286,21 @@ tbi0: tbi-phy@8 {
>         };
>  };
> 
> +&qspi {
> +       num-cs = <2>;

Please drop "num-cs" property as it is not used by qspi driver.

> +       status = "okay";
> +
> +       qflash0: flash@0 {

Can we have flash chip name instead of qflash?
There is no hard requirement, it will help in aligning node properties with other board properties such as LX2160A-RDB, LS1046A-RDB etc.

With above fixed,
Reviewed-by: Kuldeep Singh <kuldeep.singh@....com>

> +               compatible = "jedec,spi-nor";
> +               #address-cells = <1>;
> +               #size-cells = <1>;
> +               spi-max-frequency = <20000000>;
> +               reg = <0>;
> +               spi-rx-bus-width = <4>;
> +               spi-tx-bus-width = <4>;
> +       };
> +};
> +
>  &sai2 {
>         status = "okay";
>  };
> --
> 2.25.1