linux-kernel - Re: [PATCH 1/4] clk: sunxi-ng: a10/a20: rewrite init code to a platform driver

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Message-ID: <20200420203228.GA4734@plaes.org>
Date:   Mon, 20 Apr 2020 20:32:28 +0000
From:   Priit Laes <plaes@...es.org>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH 1/4] clk: sunxi-ng: a10/a20: rewrite init code to a
 platform driver

On Mon, Apr 20, 2020 at 02:49:35PM +0200, Maxime Ripard wrote:
> On Sat, Apr 18, 2020 at 01:17:27AM +0300, Priit Laes wrote:
> > In order to register regmap for sun7i CCU, there needs to be
> > a device structure already bound to the CCU device node.
> > 
> > Convert the sun4i/sun7i CCU setup to platform driver to use
> > it later as platform device.
> > 
> > Signed-off-by: Priit Laes <plaes@...es.org>
> 
> You can't relly do that though. We have timers that need those clocks before the
> device model is initialized.

Ok, I'm somewhat lost now... are these the affected timers on sun7i following:
- allwinner,sun4i-a10-timer (timer@...0c00)
- allwinner,sun7i-a20-hstimer (hstimer@...0000)

Any ideas on what approach I could actually use?

Also, similar timer dependency would affect then sun6i-a31 and sun9i-a80
platforms too...

> 
> Maxime