Re: [PATCH 0/7] dw_dmac: introduce autoconfiguration

Hein Tibosch
2012-09-17T18:16:51Z

On 9/17/2012 3:39 PM, Andy Shevchenko wrote:
> Here is a patchset that allows to adapt the driver to the hardware
> configuration during probe time. The hardware should have the specific optional
> parameters enabled. Otherwise the driver will consider values stored in the
> platform data.
>
> Additionally it brings support of the software LLP transfers. It means that
> normal linked list transfer is substituted by set of single block transfers
> transparently to the user.
>
> Comments are welcome.
>
> Andy Shevchenko (7):
> dw_dmac: mark dwc_dump_chan_regs as inline
> dw_dmac: fill optional encoded parameters in register structure
> dw_dmac: get number of channels from hardware if possible
> dw_dmac: autoconfigure block_size or use platform data
> dw_dmac: autoconfigure data_width or get it via platform data
> dw_dmac: check if controller supports LLP
> dw_dmac: introduce software emulation of LLP transfers
>
> arch/arm/mach-spear13xx/spear13xx.c | 3 +
> arch/avr32/mach-at32ap/at32ap700x.c | 3 +
> drivers/dma/dw_dmac.c | 207 +++++++++++++++++++++++++++++------
> drivers/dma/dw_dmac_regs.h | 48 ++++++++
> include/linux/dw_dmac.h | 7 ++
> 5 files changed, 235 insertions(+), 33 deletions(-)
Thanks a lot Andy,

I will soon test these patches on my avr32 platform and make a separate
patch for the 'configurable' endianness. I'm sure this can also be detected
automatically but at the cost of performance

Hein