[PATCH v4 0/4] spi: sophgo: Add SPI NOR controller for SG2042

[Chen Wang]

On 2025/7/20 16:31, Zixian Zeng wrote:
> Add support SPI NOR flash memory controller for SG2042, using upstreamed
> SG2044 SPI NOR driver.
>
> Tested on SG2042 Pioneer Box, read, write operations.
> Thanks Chen Wang who provided machine and guidance.
>
> Signed-off-by: Zixian Zeng <sycamoremoon376 at gmail.com>

Reviewed-by: Chen Wang <unicorn_wang at outlook.com> & Tested-by: Chen Wang 
<unicorn_wang at outlook.com>

Note I just have pioneerbox/sg2042 so I can only run with my board in hand.

Hi, Longbin,

As you are auther of this SPI driver, can you please help review and 
test it on sg2044?

Thanks,

Chen.

> ---
> Changes in v4:
> - patch1: Explain why SG2042 is not compatible with SG2044 and add Fixes tag.
> - patch2: Explain the hardware differences between SG2042 and SG2044.
> - patch4: Remove the extra "sophgo,sg2044-spifmc-nor" compatible property.
> - Link to v3: https://lore.kernel.org/r/20250629-sfg-spifmc-v3-0-28db1f27e999@gmail.com
>
> Changes in v3:
> - Drop the patch which adds additional flash_info into gigadevice.c
> - patch1: Because of the incompatibility, separate the SG2042 from the previous fallback mechanism to independent one.
> - patch2: Newly add configurable options to spi-sg2044-nor driver.
> - patch3: Fix reading bytes issue that causes the spi_nor_check_sfdp_signature() failure on SG2042.
> - Link to v2: https://lore.kernel.org/r/20250525-sfg-spifmc-v2-0-a3732b6f5ab4@gmail.com
>
> Changes in v2:
> - patch1: Accept devicetree nodes whose compatible contains only
>    "sophgo,sg2044-spifmc-nor" to avoid breaking existing devicetrees.
> - patch1: Improve the commit subject message.
> - patch2: Dump the SFDP information to commit message.
> - Link to v1: https://lore.kernel.org/r/20250523-sfg-spifmc-v1-0-4cf16cf3fd2a@gmail.com
>
> ---
> Zixian Zeng (4):
>        spi: dt-bindings: spi-sg2044-nor: Change SOPHGO SG2042
>        spi: spi-sg2044-nor: Add configurable chip_info
>        spi: spi-sg2044-nor: Add SPI-NOR controller for SG2042
>        riscv: dts: sophgo: Add SPI NOR node for SG2042
>
>   .../devicetree/bindings/spi/spi-sg2044-nor.yaml    |  9 +++----
>   .../riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts | 24 ++++++++++++++++++
>   arch/riscv/boot/dts/sophgo/sg2042.dtsi             | 24 ++++++++++++++++++
>   drivers/spi/spi-sg2044-nor.c                       | 29 +++++++++++++++++++---
>   4 files changed, 77 insertions(+), 9 deletions(-)
> ---
> base-commit: 8727665368cd4af112146b650ec0ebac038b5cf5
> change-id: 20250523-sfg-spifmc-7a910290e964
>
> Best regards,