[U-Boot Patch v2 0/4] Fix currently available support for flash on HiFive Unleashed

[Bin Meng]

Hi Sagar,

On Wed, Jan 29, 2020 at 2:02 AM Sagar Shrikant Kadam
<sagar.kadam at sifive.com> wrote:
>
> Currently device ID for flash mounted on HiFive Unleashed is added to
> U-Boot. Also there are few patches about to go in mainline (Thanks to
> Jagan Tekki and Bin Meng).
>
> This series addresses few issues discussed there:
> Patch 1:Add num-cs to device tree which is used by spi-uclass to detect
>         valid chip select numbers
> Patch 2:Handles valid chip selects only. Flash device is now detected only
>         on chip select 0.
> Patch 3:Over-ride spi tx/rx width specified in hifive-unleshed-a00.dts file
>         from 4 to 1 in corresponding -u-boot.dtsi
>

Thank you for fixing all these SPI flash issues!

> This series is based on mainline commit c05b38df477a ("common: fix
> regression on block cache init") and two below mentioned patches from [1]
> [U-Boot,v2,4/5] riscv: dts: hifive-unleashed-a00: Add -u-boot.dtsi
> [U-Boot,v2,5/5] sifive: fu540: Enable spi-nor flash support
>
> [1] https://patchwork.ozlabs.org/patch/1177979/
>
> The above series is available for testing here[2]
> [2] https://github.com/sagsifive/u-boot/tree/dev/sagark/test_spi-nor_v2
>
> Change History:
> V1-V2:
> 1. Dropped 6th and 7th patch sent in V1 from this series so as to separate
>    out spi-nor related changes in different series and avoid adding TODO
>    fixes to spi-nor-core framework.

Did you resend the 6th and 7th patches as a separate series? I can't
find them on the ML.

> 2. Removed patch to include -uboot.dts, as it gets automatically included.
> 3. Over-ride tx/rx width from hifive-unleashed-a00.dts using hifive
>    -unleashed-a00-u-boot.dtsi
> 4. Print fdt base address in board info for debugging.
>
> V1: First version of series
>
>
> ================Log for reference=====================
> Flash detection only at valid Chip select
> => sf probe 0:0
> SF: Detected is25wp256 with page size 256 Bytes, erase size 4 KiB, total 32 MiB
> => sf probe 0:1
> Invalid cs number = 1
> Failed to initialize SPI flash at 0:1 (error -22)
> => sf probe 0:2
> Invalid cs number = 2
> Failed to initialize SPI flash at 0:2 (error -22)
> => sf probe 0:0
> SF: Detected is25wp256 with page size 256 Bytes, erase size 4 KiB, total 32 MiB
>
> =>----------------------------------------------------------------
> Full flash memory erase/write/read/validate
> => mw 0x80600000 0x12348765 0x800000
> => sf erase 0x0 0x2000000
> SF: 33554432 bytes @ 0x0 Erased: OK
> => sf write 0x80600000 0x0 0x2000000
> device 0 whole chip
> SF: 33554432 bytes @ 0x0 Written: OK
> => sf read  0x82600000 0x0 0x2000000
> device 0 whole chip
> SF: 33554432 bytes @ 0x0 Read: OK
> => cmp.b 0x80600000 0x82600000 0x2000000
> Total of 33554432 byte(s) were the same
> =>----------------------------------------------------------------

Regards,
Bin