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    SubjectRe: [PATCH 4/4] arm64: dts: lx2160a: update fspi node
    On Thu,  4 Oct 2018 14:18:40 +0530
    Yogesh Gaur <yogeshnarayan.gaur@nxp.com> wrote:

    > Flash mt35xu512aba connected to FlexSPI controller supports
    > 1-1-8 protocol.
    > Added flag spi-rx-bus-width and spi-tx-bus-width with values as
    > 8 and 1 respectively for both flashes connected at CS0 and CS1.
    >
    > Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
    > ---
    > arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts | 4 ++++
    > 1 file changed, 4 insertions(+)
    >
    > diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts
    > index 901ca346..817175a 100644
    > --- a/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts
    > +++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts
    > @@ -42,6 +42,8 @@
    > m25p,fast-read;
    > spi-max-frequency = <20000000>;
    > reg = <0>;
    > + spi-rx-bus-width = <8>;
    > + spi-tx-bus-width = <1>;

    Why 1? The flash is already flagged with SPI_NOR_OCTAL_READ, which
    means only the read path will use 1-1-8 mode, so you can safely set
    spi-tx-bus-width here and let the framework choose the appropriate mode
    based on the flash capabilities.

    > };
    >
    > mt35xu512aba1: flash@1 {
    > @@ -51,6 +53,8 @@
    > m25p,fast-read;
    > spi-max-frequency = <20000000>;
    > reg = <1>;
    > + spi-rx-bus-width = <8>;
    > + spi-tx-bus-width = <1>;
    > };
    > };
    >

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