linux-kernel - Re: [PATCH] i2c/busses: Add i2c-icy for I2C on m68k/Amiga

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Message-ID: <0d61e12f-5fc5-7cb6-755f-298ebf4c935f@enpas.org>
Date:   Tue, 13 Aug 2019 00:21:03 +0200
From:   Max Staudt <max@...as.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Linux I2C <linux-i2c@...r.kernel.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Linux/m68k <linux-m68k@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Subject: Re: [PATCH] i2c/busses: Add i2c-icy for I2C on m68k/Amiga

On 08/12/2019 11:37 AM, Geert Uytterhoeven wrote:
>> +       iowrite8(val, address);
> 
> As this is on a Zorro bus, z_writeb()?

I forgot to ask about this.

What is the reasoning behind having a separate z_writeb() for Zorro?
As far as I can see in arch/m68k/include/asm this maps 1:1 to a direct memory access, and it prohibits cross-arch code as in i2c-elektor.


Thanks,
Max