linux-kernel - Re: dma_declare_coherent

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Message-ID: <CAFr9PXnuFWFy-3mUAo63aiP5qXmD9ULycWVn=_YG96ReohJAjg@mail.gmail.com>
Date:   Mon, 28 Jun 2021 18:29:51 +0900
From:   Daniel Palmer <daniel@...f.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        Christoph Hellwig <hch@....de>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: dma_declare_coherent_memory and SuperH

Hi Geert,

On Mon, 28 Jun 2021 at 17:57, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > There is an unmerged patch set by Yoshinori Sato that adds device tree support for SH.
>
> But it does not include support for SH7724 yet, only for SH775[01]
> (note to myself: still have to try it on my landisk).

I have some landisks. Is there a sane u-boot for them? I think mine
still have the hacked up lilo thing.

> Fortunately most core devices on SH7724 and Ecovec should already
> have DT support in their drivers. The main missing pieces are
> interrupt and clock support.

This sounds like a fun project. I'm not sure if I could manage it
without the Hitachi/Renesas debugging dongle though.

Anyhow, it would be a shame to remove the ecovec just because it
doesn't have DT as it pretty much fully works with a few small patches
to fix some bit rot like ethernet and the LCD not working.
I sent a patch a few years ago for the ethernet and never got a response. :(

Cheers,

Daniel