linux-kernel - RE: [EXT] Re: [PATCHv2] arm64: dts: ls1028a: add flexspi nodes

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Date:   Thu, 23 May 2019 08:06:42 +0000
From:   Xiaowei Bao <xiaowei.bao@....com>
To:     Shawn Guo <shawnguo@...nel.org>
CC:     Leo Li <leoyang.li@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] Re: [PATCHv2] arm64: dts: ls1028a: add flexspi nodes

Hi Shawn,

-----Original Message-----
From: Shawn Guo <shawnguo@...nel.org> 
Sent: 2019年5月23日 16:01
To: Xiaowei Bao <xiaowei.bao@....com>
Cc: Leo Li <leoyang.li@....com>; robh+dt@...nel.org; mark.rutland@....com; linux-arm-kernel@...ts.infradead.org; devicetree@...r.kernel.org; linux-kernel@...r.kernel.org
Subject: [EXT] Re: [PATCHv2] arm64: dts: ls1028a: add flexspi nodes

Caution: EXT Email

On Wed, May 15, 2019 at 11:09:25AM +0000, Xiaowei Bao wrote:
> From: Xiaowei Bao <xiaowei.bao@....com>
>
> Add fspi node property for LS1028A SoC for FlexSPI driver.
> Property added for the FlexSPI controller and for the connected slave 
> device for the LS1028ARDB and LS1028AQDS target.
> This is having one SPI-NOR flash device, mt35xu02g connected at CS0.
>
> Signed-off-by: Xiaowei Bao <xiaowei.bao@....com>
> ---
> v2:
>  - modify the commit message and the dts format.
>
>  arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts |   15 +++++++++++++++
>  arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts |   15 +++++++++++++++
>  arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi    |   12 ++++++++++++
>  3 files changed, 42 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts 
> b/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts
> index 5bcd491..6e12806 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts
> @@ -158,6 +158,21 @@
>       };
>  };
>
> +&fspi {

Keep the labeling node sort alphabetically.  That said, &fspi should be added before &i2c0.

> +     status = "okay";

Please have newline between property and child node.

> +     mt35xu02g: flash@0 {
> +             #address-cells = <1>;
> +             #size-cells = <1>;
> +             compatible = "spansion,m25p80";

Please start properties with compatible.
[Xiaowei Bao] I have submit the v3 patch to fix this issue.

> +             m25p,fast-read;
> +             spi-max-frequency = <20000000>;
> +             reg = <0>;
> +             /* The following setting enables 1-1-8 (CMD-ADDR-DATA) mode */
> +             spi-rx-bus-width = <8>; /* 8 SPI Rx lines */
> +             spi-tx-bus-width = <1>; /* 1 SPI Tx line */
> +     };
> +};
> +
>  &sai1 {
>       status = "okay";
>  };
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts 
> b/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts
> index 25d2370..5d39616 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts
> @@ -136,6 +136,21 @@
>       };
>  };
>
> +&fspi {
> +     status = "okay";
> +     mt35xu02g: flash@0 {
> +             #address-cells = <1>;
> +             #size-cells = <1>;
> +             compatible = "spansion,m25p80";
> +             m25p,fast-read;
> +             spi-max-frequency = <20000000>;
> +             reg = <0>;
> +             /* The following setting enables 1-1-8 (CMD-ADDR-DATA) mode */
> +             spi-rx-bus-width = <8>; /* 8 SPI Rx lines */
> +             spi-tx-bus-width = <1>; /* 1 SPI Tx line */
> +     };
> +};
> +
>  &duart0 {
>       status = "okay";
>  };
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi 
> b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> index ba71a33..a27cd60 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> @@ -109,6 +109,18 @@
>               };
>       };
>
> +     fspi: spi@...0000 {

Are you sure you want to add this device node outside of 'soc' node?

> +             compatible = "nxp,lx2160a-fspi", "simple-bus";
> +             #address-cells = <1>;
> +             #size-cells = <0>;
> +             reg = <0x0 0x20c0000 0x0 0x10000>,
> +                 <0x0 0x20000000 0x0 0x10000000>;

Fix the indentation to git it aligned with above '<'.
[Xiaowei Bao] this is aligned, I don't know why it is not aligned in email. Thanks.

> +             reg-names = "FSPI", "FSPI-memory";
> +             interrupts = <0 25 0x4>; /* Level high type */

interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;

Shawn

> +             clocks = <&clockgen 4 3>, <&clockgen 4 3>;
> +             clock-names = "fspi_en", "fspi";
> +     };
> +
>       soc: soc {
>               compatible = "simple-bus";
>               #address-cells = <2>;
> --
> 1.7.1
>