linux-kernel - Re: [RFC 0/7] iio: inv_mpu6050: Support i2c master and external readings

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Message-ID: <20160502152328.GG6292@sirena.org.uk>
Date:	Mon, 2 May 2016 16:23:28 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Jonathan Cameron <jic23@...nel.org>
Cc:	Crestez Dan Leonard <leonard.crestez@...el.com>,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	Hartmut Knaack <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald-Stadler <pmeerw@...erw.net>,
	Daniel Baluta <daniel.baluta@...el.com>,
	Ge Gao <GGao@...ensense.com>, Peter Rosin <peda@...ntia.se>
Subject: Re: [RFC 0/7] iio: inv_mpu6050: Support i2c master and external
 readings

On Sun, May 01, 2016 at 06:04:08PM +0100, Jonathan Cameron wrote:

> If you were to break these registers up into regmap fields it might solve 
> this..  Regmap writes always go through whatever - whether they match the
> existing state of the cache or not.  If fields are involved the write will get
> built up from whatever field you change and whatever the cache has for other
> elements.  I guess it only works if they volatile bits are contiguous though.
> Maybe hand rolling it is cleaner here.

> Mark, any clever thoughts on this?

I don't have enough context here to be sure what the problem you're
trying to solve is, sorry.

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