linux-kernel - Re: [PATCH v3 2/6] Add the main bulk of core driver for SI476x code

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Date:	Sat, 27 Oct 2012 19:08:11 -0700
From:	Andrey Smirnov <andrey.smirnov@...vergeddevices.net>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC:	<hverkuil@...all.nl>, <mchehab@...hat.com>,
	<sameo@...ux.intel.com>, <perex@...ex.cz>, <tiwai@...e.de>,
	<linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/6] Add the main bulk of core driver for SI476x code

On 10/27/2012 02:31 PM, Mark Brown wrote:
> On Thu, Oct 25, 2012 at 03:26:02PM -0700, Andrey Smirnov wrote:
>> On 10/25/2012 12:45 PM, Mark Brown wrote:
>>> This really makes little sense to me, why are you doing this?  Does the
>>> device *really* layer a byte stream on top of I2C for sending messages
>>> that look like marshalled register reads and writes?
>> The SI476x chips has a concept of a "property". Each property having
>> 16-bit address and 16-bit value. At least a portion of a chip
>> configuration is done by modifying those properties. In order to
> Right, that's what I remembered from previous code.  There's no way this
> should be a regmap bus - a bus is something that gets data serialised by
> the core into a byte stream, having the data rendered down into a byte
> stream and then reparsing it is a bit silly.  The device should be
> hooking in before the data gets marshalled which we can't currently do
> but it shouldn't be too hard to make it so that we can have register
> read and write functions supplied in the regmap config.

Oh, now I think I see what you mean. I have two agree with you, I don't
think I like what I am doing in my code.
I'll try to familiarize myself with 'regmap' code and come up with the
way to extend the framework.

And I just wanted to upstream my simple radio driver... :-)



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