[U-Boot] [PATCH v3 1/3] spi: nxp_fspi: new driver for the FlexSPI controller

Michael Walle michael at walle.cc
Thu Nov 21 12:47:33 UTC 2019

Am 2019-11-06 00:03, schrieb Michael Walle:
> This is a port of the kernel's spi-nxp-fspi driver. It uses the new
> spi-mem interface and does not expose the more generic spi-xfer
> interface. The source was taken from the v5.3-rc3 tag.
> The port was straightforward:
>  - remove the interrupt handling and the completion by busy polling the
>    controller
>  - remove locks
>  - move the setup of the memory windows into claim_bus()
>  - move the setup of the speed into set_speed()
>  - port the device tree bindings from the original fspi_probe() to
>    ofdata_to_platdata()
> There were only some style change fixes, no change in any logic. For
> example, there are busy loops where the return code is not handled
> correctly, eg. only prints a warning with WARN_ON(). This port
> intentionally left most functions unchanged to ease future bugfixes.
> This was tested on a custom LS1028A board. Because the LS1028A doesn't
> have proper clock framework support, changing the clock speed was not
> tested. This also means that it is not possible to change the SPI
> speed on LS1028A for now (neither is it possible in the linux driver).
> Signed-off-by: Michael Walle <michael at walle.cc>
> Reviewed-by: Jagan Teki <jagan at amarulasolutions.com>
> ---
> changes since v1:
>  - fixed typo, thanks Jagan
> changes since v2:
>  - none

Ping. any news on this?


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