linux-kernel - Re: [PATCH] arm64: dts: stratix10: Add QSPI support for Stratix10

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Date:   Fri, 11 May 2018 07:31:45 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     thor.thayer@...ux.intel.com
Cc:     Dinh Nguyen <dinguyen@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>, devicetree@...r.kernel.org,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: stratix10: Add QSPI support for Stratix10

On Thu, May 10, 2018 at 3:46 PM,  <thor.thayer@...ux.intel.com> wrote:
> From: Thor Thayer <thor.thayer@...ux.intel.com>
>
> Add qspi_clock
>    The qspi_clk frequency is updated by U-Boot before starting Linux.
> Add QSPI interface node.
> Add QSPI flash memory child node.
>    Setup the QSPI memory in 2 partitions.
>
> Signed-off-by: Thor Thayer <thor.thayer@...ux.intel.com>
> ---
>  arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi  | 22 +++++++++++++++
>  .../boot/dts/altera/socfpga_stratix10_socdk.dts    | 31 ++++++++++++++++++++++
>  2 files changed, 53 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi b/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi
> index e6b059378dc0..ed47dfce3ba6 100644
> --- a/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi
> +++ b/arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi
> @@ -119,6 +119,12 @@
>                                 #clock-cells = <0>;
>                                 compatible = "fixed-clock";
>                         };
> +
> +                       qspi_clk: qspi_clk {

s/_/-/

> +                               #clock-cells = <0>;
> +                               compatible = "fixed-clock";
> +                               clock-frequency = <200000000>;
> +                       };
>                 };
>
>                 gmac0: ethernet@...00000 {
> @@ -466,5 +472,21 @@
>                                 interrupts = <16 4>, <48 4>;
>                         };
>                 };
> +
> +               qspi: spi@...d2000 {
> +                       compatible = "cdns,qspi-nor";
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +                       reg = <0xff8d2000 0x100>,
> +                             <0xff900000 0x100000>;
> +                       interrupts = <0 3 4>;
> +                       cdns,fifo-depth = <128>;
> +                       cdns,fifo-width = <4>;
> +                       cdns,trigger-address = <0x00000000>;
> +                       clocks = <&qspi_clk>;
> +                       bus-num = <1>;
> +
> +                       status = "disabled";
> +               };
>         };
>  };
> diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
> index f9b1ef12db48..60251462067a 100644
> --- a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
> +++ b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts
> @@ -147,3 +147,34 @@
>                 reg = <0x68>;
>         };
>  };
> +
> +&qspi {
> +       flash0: n25q00@0 {

flash@0

> +               #address-cells = <1>;
> +               #size-cells = <1>;
> +               compatible = "n25q00aa";
> +               reg = <0>;
> +               spi-max-frequency = <50000000>;
> +
> +               m25p,fast-read;
> +               cdns,page-size = <256>;
> +               cdns,block-size = <16>;
> +               cdns,read-delay = <1>;
> +               cdns,tshsl-ns = <50>;
> +               cdns,tsd2d-ns = <50>;
> +               cdns,tchsh-ns = <4>;
> +               cdns,tslch-ns = <4>;
> +
> +               partition@...i-boot {

use a 'partitions' node to contain all the partitions.

> +                       label = "Boot and fpga data";
> +                       /* 64MB for boot and FPGA data */
> +                       reg = <0x0 0x4000000>;
> +               };
> +
> +               partition@...i-rootfs {
> +                       label = "Root Filesystem - JFFS2";
> +                       /* 64MB for Linux jffs2 */
> +                       reg = <0x4000000 0x4000000>;
> +               };
> +       };
> +};
> --
> 2.7.4
>