linux-kernel - Re: [PATCH 1/2] sh: dma: fix `dmaor_read_reg`/`dmaor_write

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Date:   Mon, 08 May 2023 13:27:57 +0200
From:   John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Artur Rojek <contact@...ur-rojek.eu>
Cc:     Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Rafael Ignacio Zurita <rafaelignacio.zurita@...il.com>,
        linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] sh: dma: fix `dmaor_read_reg`/`dmaor_write_reg`
 macros

Hi Geert!

On Mon, 2023-05-08 at 13:20 +0200, Geert Uytterhoeven wrote:
> Looks like this is still broken on e.g. SH7751R, which has 8 channels,
> both handled by a single DMAOR register at offset 0x40...
> 
> While e.g. dma_base_addr() seems to have some provision for this
> (cfr. the "chan >= 9" (not "8") check), dma_find_base() will fail, as
> arch/sh/include/cpu-sh4/cpu/dma.h defines SH_DMAC_BASE1.
> Anyway, that's not new, so I have no objection to your patch.

Was SH7751R broken by 7f47c7189b3e8f19 as well?

Adrian

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