linux-kernel - Re: [PATCH 2/2] i2c: slave-eeprom: support additional models

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Date:   Mon, 20 Apr 2020 15:23:10 -0500
From:   Patrick Williams <patrick@...cx.xyz>
To:     Wolfram Sang <wsa@...-dreams.de>
Cc:     Patrick Williams <alpawi@...zon.com>,
        Björn Ardö <bjorn.ardo@...s.com>,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] i2c: slave-eeprom: support additional models

On Mon, Apr 20, 2020 at 06:46:19PM +0200, Wolfram Sang wrote:
> On Tue, Oct 01, 2019 at 11:40:06AM -0500, Patrick Williams wrote:
> > Add support for emulating the following EEPROMs:
> >     * 24c01  - 1024 bit
> >     * 24c128 - 128k bit
> >     * 24c256 - 256k bit
> >     * 24c512 - 512k bit
> > 
> > The flag bits in the device id were shifted up 1 bit to make
> > room for saving the 24c512's size.  24c512 uses the full 16-bit
> > address space of a 2-byte addressable EEPROM.
> > 
> > Signed-off-by: Patrick Williams <alpawi@...zon.com>
> 
> Do you really need them or is it just nice to have?
> 
> I am undecided. I definately don't want all the EEPROM types which
> exist, but the full 16 bit address range makes sense...
> 
> More opinions welcome.
> 

I don't remember exactly which ones we needed (and I am no longer at
Amazon), but it was pretty trivial to add them all to the table so I
went ahead and did it.  As long as we had one of the 2-byte addressable
EEPROMs, anything else necessary could be handleded as a small
out-of-tree patch.

-- 
Patrick Williams

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