[U-Boot Patch v2 3/4] dts: u-boot.dtsi: override flash tx-rx width

[Bin Meng]

Hi Sagar,

On Wed, Jan 29, 2020 at 2:02 AM Sagar Shrikant Kadam
<sagar.kadam at sifive.com> wrote:
>
> The hifive-unleashed-a00.dts has flash spi-tx/rx width set
> to 4-bit mode. During sf probe, spi_nor_scan fails to read the
> JEDEC ID with reg_proto set to SNOR_PROTO_1_1_1. Setting it to
> 1-bit mode as of now will help read the JEDEC-ID and perform other
> flash operations.

So previously with Jagan's series that did not have these changes in
this commit, the flash driver worked well. I wonder what real issue
was fixed in this commit?

>
> Signed-off-by: Sagar Shrikant Kadam <sagar.kadam at sifive.com>
> ---
>  arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi b/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi
> index d7a6413..dae9f87 100644
> --- a/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi
> +++ b/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi
> @@ -9,3 +9,11 @@
>                 spi2 = &qspi2;
>         };
>  };
> +
> +&qspi0 {
> +       flash at 0 {
> +               spi-tx-bus-width = <1>;
> +               spi-rx-bus-width = <1>;
> +       };
> +};
> +

Regards,
Bin