Re: [PATCH 0/3] dmaengine: Stear users towards dma_request_slave_chan()

[Geert Uytterhoeven]

Hi Adrian,

On Mon, Feb 3, 2020 at 9:21 PM John Paul Adrian Glaubitz
<glaubitz@xxxxxxxxxxxxxxxxxxx> wrote:
> On 2/3/20 2:32 PM, Geert Uytterhoeven wrote:
> > Both rspi and sh-msiof have users on legacy SH (i.e. without DT):
>
> FWIW, there is a patch set by Yoshinori Sato to add device tree support
> for classical SuperH hardware. It was never merged, unfortunately :(.

True.

> > Anyone who cares for DMA on SuperH?
>
> What is DMA used for on SuperH? Wouldn't dropping it cut support for
> essential hardware features?

It may make a few things slower.

Does any of your SuperH boards use DMA?
Anything interesting in /proc or /sys w.r.t. DMA?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds