[U-Boot] [PATCH] mxs: mmc: spi: dma: Better wrap the MXS differences

[Stefano Babic <sbabic@denx.de>]

On 02/02/2013 06:55, Marek Vasut wrote:
> This patch streamlines the differences between the MX23 and MX28 by
> implementing a few helper functions to handle different DMA channel
> mapping, different clock domain for SSP block and fixes a few minor
> bugs.
> 
> First of all, the DMA channel mapping is now fixed in dma.h by defining
> the actual channel map for both MX23 and MX28. Thus, MX23 now does no
> longer use MX28 channel map which was wrong. Also, there is a fix for
> MX28 DMA channel map, where the last four channels were incorrect.
> 
> Next, because correct DMA channel map is in place, the mxs_dma_init_channel()
> call now bases the channel ID starting from SSP port #0. This removes the
> need for DMA channel offset being added and cleans up the code. For the
> same reason, the SSP0 offset can now be used in mxs_dma_desc_append(), thus
> no need to adjust dma channel number in the driver either.
> 
> Lastly, the SSP clock ID is now retrieved by calling mxs_ssp_clock_by_bus()
> which handles the fact that MX23 has shared SSP clock for both ports, while
> MX28 has per-port SSP clock.
> 
> Finally, the mxs_ssp_bus_id_valid() pulls out two implementations of the
> same functionality from MMC and SPI driver into common code.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Fabio Estevam <fabio.estevam@freescale.com>
> Cc: Otavio Salvador <otavio@ossystems.com.br>
> Cc: Stefano Babic <sbabic@denx.de>
> ---
>  arch/arm/include/asm/arch-mxs/dma.h      |   19 ++++++++++++++++++-
>  arch/arm/include/asm/arch-mxs/regs-ssp.h |   26 ++++++++++++++++++++++++++
>  drivers/mmc/mxsmmc.c                     |   20 ++++----------------
>  drivers/spi/mxs_spi.c                    |    4 ++--
>  4 files changed, 50 insertions(+), 19 deletions(-)
> 
> NOTE: COMPILE TESTED ONLY!!! I need someone to actually test this stuff.

Hi all,

I am thinking about how to proceed with this. Is there any plan to test
it ? It would prefer that it runs at least once else merging it now
without any test and fix later.

Regards,
Stefano

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