[PATCH v4 00/13] riscv: Add SPI support for Kendryte K210

[Jagan Teki]

On Sat, Oct 17, 2020 at 4:28 AM Sean Anderson <seanga2 at gmail.com> wrote:
>
> This series adds support for SPI on the Kendryte K210. This covers the MMC
> slot and SPI flash on the Sipeed Maix Bit.
>
> This series makes significant changes to the designware SPI driver. I would
> really appreciate if the maintainers I CC'd could test this series and ensure
> that SPI still works on all their devices. I have tried my best not to affect
> existing devices, but I'd rather find out if this breaks stuff now rather than
> later. In particular, the method of detecting SSI_MAX_XFER_SIZE has changed
> since the last revision, and will need to be re-tested.
>
> This series was previously part of
> https://patchwork.ozlabs.org/project/uboot/list/?series=161576
>
> Changes in v4:
> - Auto-detect SSI_MAX_XFER_SIZE
> - Consolidate log messages in dw_spi_xfer. We don't need to print twice in such
>   short succession.
> - Convert most log_xxx messages to dev_xxx. Since ceb70bb870 ("dm: Print device
>   name in dev_xxx like Linux"), dev_xxx can be controlled at runtime in the same
>   way as log_xxx. The log messages in dw_reader/dw_writer are not converted to
>   reduce the amount of instructions in those loops, even with logging enabled.
> - Enable booting from MMC
> - Fix MMC transfer errors
> - Place env in spi flash
> - Rearrange headers in designware_spi.c
> - Remove spi_enable_chip
> - Update documentation
>
> Changes in v3:
> - Lower the log level of some messages
> - Prefix user-facing logs with SPI@<address>
> - Rebase onto U-Boot master
> - Remove env and bootcmd configuration. I'm going to punt on those for now,
>   since I haven't worked out the best way to boot with SPI yet. Those
>   settings may be added back in a follow-up patch.
> - Reword error messages as "message (error %d)"
> - Synchronize compatible strings between docs and driver
> - Use constant 0x10000 instead of SZ_64K. The latter is not included on
>   some platforms and I'm too lazy to figure out what the correct header is.
>
> Changes in v2:
> - Add Gigadevice SPI chips to dependencies
> - Add external gpio cs support
> - Clean up exec_op
> - Configure ctrlr0 register layout based on compatible string
> - Convert debug calls to log_ instead of removing the ones which affect
>   timing
> - Document new compatible strings
> - Limit data transfers to 64k
> - Remove broken-wp property (implicit due to no wp gpio)
> - Remove ctrl0 field offsets from device tree
> - Switch to new compatible strings
> - Switch to new pinmux binding style
>
> Sean Anderson (13):
>   spi: dw: Fix driving MOSI low while recieving
>   spi: dw: Convert calls to debug to dev_*
>   spi: dw: Rename "cs-gpio" to "cs-gpios"
>   spi: dw: Use generic function to read reg address
>   spi: dw: Rename registers to match datasheet
>   spi: dw: Remove spi_enable_chip
>   spi: dw: Rearrange struct dw_spi_priv
>   spi: dw: Add SoC-specific compatible strings
>   spi: dw: Add support for multiple CTRLR0 layouts
>   spi: dw: Document devicetree binding
>   spi: dw: Add mem_ops
>   riscv: Add device tree bindings for SPI
>   riscv: Add support for SPI on Kendryte K210

Except for this patch with HUSH PARSER missing rest look fine for me.

Reviewed-by: Jagan Teki <jagan at amarulasolutions.com>