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Message-ID: <20171009071809.jte47cd2mt4iv6y7@flea.lan>
Date: Mon, 9 Oct 2017 09:18:09 +0200
From: Maxime Ripard <maxime.ripard@...e-electrons.com>
To: Icenowy Zheng <icenowy@...c.io>
Cc: Chen-Yu Tsai <wens@...e.org>, linux-arm-kernel@...ts.infradead.org,
linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-sunxi@...glegroups.com
Subject: Re: [PATCH 0/2] Add a regmap to Allwinner R40 CCU to export GMAC
register
On Fri, Oct 06, 2017 at 06:33:31AM +0000, Icenowy Zheng wrote:
> In the CCU of the Allwinner R40 SoC, there's a GMAC configuration register,
> which is intended to be accessed by the dwmac-sun8i driver. On SoCs already
> supported by the driver the register is placed in the syscon rather than
> the CCU.
>
> As CCU is a critical part of the SoC, so write to it should be strictly
> limited. A regmap with restricted write permission is created by the R40
> CCU driver, and can be get with dev_get_regmap. In order to tie the regmap
> to the CCU device, the R40 CCU is now a platform driver, so a platform
> device is created for it (and then tied with the regmap).
>
> The first patch does the conversion of the driver to a platform driver,
> and the second patch adds the regmap.
I'd like to see first what you want to do with it.
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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