[PATCH 1/1] ARM: imx: spi: Add NXP IMX8 Flex SPI/QSPI support

[Ahmad Fatoum]

Hello Joacim,

On 28.02.22 17:57, Joacim Zetterling wrote:
> This driver is ported from the linux kernel and adapted to barebox
> for the NXP IMX8 platforms.
> 
> This commit add support for the NXP IMX8 Flex SPI controller in master
> mode. Up to four slave devices can be connected on two buses with two
> chip selects each. This controller does not support generic SPI messages
> and only supports the high-level SPI memory interface.
> 
> Tested on the NXP IMX8MN-EVK evaluation board as well as on a 
> IMX8MN custom board supporting a Micron N25Q00 QSPI flash.

I haven't reviewed the driver itself, but some general feedback below.

> 
> Signed-off-by: Joacim Zetterling <joacim.zetterling at westermo.com>
> ---
>  drivers/spi/Kconfig                |   10 +
>  drivers/spi/Makefile               |    1 +
>  drivers/spi/spi-nxp-fspi.c         | 1061 ++++++++++++++++++++++++++++
>  dts/Bindings/spi/spi-nxp-fspi.yaml |    1 +
>  4 files changed, 1073 insertions(+)
>  create mode 100644 drivers/spi/spi-nxp-fspi.c
> 
> diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
> index b0137d21e073..f7e92665d5a8 100644
> --- a/drivers/spi/Kconfig
> +++ b/drivers/spi/Kconfig
> @@ -114,6 +114,16 @@ config DRIVER_SPI_STM32
>  	  Enable the STM32 Serial Peripheral Interface (SPI) driver for STM32MP
>  	  SoCs.
>  
> +config SPI_NXP_FLEXSPI
> +	tristate "NXP Flex SPI controller"
> +	depends on ARCH_IMX8M || HAS_IOMEM

HAS_IOMEM doesn't exist in barebox. You can replace this with COMPILE_TEST

> diff --git a/dts/Bindings/spi/spi-nxp-fspi.yaml b/dts/Bindings/spi/spi-nxp-fspi.yaml
> index 283815d59e85..62930d0cf43f 100644
> --- a/dts/Bindings/spi/spi-nxp-fspi.yaml
> +++ b/dts/Bindings/spi/spi-nxp-fspi.yaml
> @@ -17,6 +17,7 @@ properties:
>      enum:
>        - nxp,imx8dxl-fspi
>        - nxp,imx8mm-fspi
> +      - nxp,imx8mn-fspi
>        - nxp,imx8mp-fspi
>        - nxp,imx8qxp-fspi
>        - nxp,lx2160a-fspi

dts/ is imported from Linux as-is. You shouldn't edit stuff there.

Cheers,
Ahmad

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