Thread (269 messages) 269 messages, 18 authors, 2014-11-11

[linux-sunxi] Re: [PATCH 4/4] simplefb: add clock handling code

From: broonie@kernel.org (Mark Brown)
Date: 2014-09-30 17:39:28
Also in: linux-fbdev

On Tue, Sep 30, 2014 at 07:09:24AM +0200, Thierry Reding wrote:
On Mon, Sep 29, 2014 at 04:55:17PM +0100, Mark Brown wrote:
quoted
So long as we're ensuring that when we don't start supporting resources
without DT additions or at least require DT additions to actively manage
them (which can then include simplefb hookup) we should be fine.
I'm not sure I understand what you mean. If we add a driver for the PMIC
that exposes these regulators and then add a DT node for the PMIC, we'd
still need to fix the firmware to generate the appropriate DT properties
to allow simplefb to enable the regulators.
No, you don't.  It's only if you start describing the regulators in the
PMIC in DT that you run into problems.  Unconfigured regulators won't be
touched.
So unless firmware is updated at the same time, regulators will get
disabled because they are unused.
That won't happen unless the regulators are explicitly described, if
they are described as unused then this will of course happen.
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