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Re: [PATCH 6/6] regulator: anatop: set default voltage selector for pcie

From Dong Aisheng <dongas86@gmail.com>
Newsgroups linux.kernel
Subject Re: [PATCH 6/6] regulator: anatop: set default voltage selector for pcie
Date 2017-04-12 17:50 +0200
Message-ID <tvsGS-6f3-19@gated-at.bofh.it> (permalink)
References <tvaJX-3qG-9@gated-at.bofh.it> <tvaTE-3ut-23@gated-at.bofh.it> <tvaTE-3ut-21@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, Apr 11, 2017 at 09:40:03PM +0100, Mark Brown wrote:
> On Wed, Apr 12, 2017 at 09:58:47AM +0800, Dong Aisheng wrote:
> > Set the initial voltage selector for vddpcie in case it's disabled
> > by default.
> 
> Why is this the only anatop regulator which can have this problem and
> how do we know this is a good value?

Anatop regulator has no separate gate bit.
e.g.
00000 Power gated off
00001 Target core voltage = 0.725V
...
So it may have no valid default voltage in case it's disabled in
bootloader.
e.g. regulator_enable() may not work.

The default voltage 1.100v this patch sets is defined in reference
manual.

Regards
Dong Aisheng

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Thread

Re: [PATCH 6/6] regulator: anatop: set default voltage selector for  pcie Mark Brown <broonie@kernel.org> - 2017-04-11 22:50 +0200
  Re: [PATCH 6/6] regulator: anatop: set default voltage selector for  pcie Mark Brown <broonie@kernel.org> - 2017-04-12 17:50 +0200
    Re: [PATCH 6/6] regulator: anatop: set default voltage selector for pcie Dong Aisheng <dongas86@gmail.com> - 2017-04-12 18:20 +0200
  Re: [PATCH 6/6] regulator: anatop: set default voltage selector for  pcie Dong Aisheng <dongas86@gmail.com> - 2017-04-12 17:50 +0200
    Re: [PATCH 6/6] regulator: anatop: set default voltage selector for  pcie Lucas Stach <l.stach@pengutronix.de> - 2017-04-12 18:20 +0200
      Re: [PATCH 6/6] regulator: anatop: set default voltage selector for  pcie Mark Brown <broonie@kernel.org> - 2017-04-12 18:20 +0200

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