linux-kernel - Re: Tegra boots failing due to as3722 I/O errors

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Message-ID: <20160330164646.GH2350@sirena.org.uk>
Date:	Wed, 30 Mar 2016 09:46:46 -0700
From:	Mark Brown <broonie@...nel.org>
To:	Jon Hunter <jonathanh@...dia.com>
Cc:	Laxman Dewangan <ldewangan@...dia.com>,
	"Maciej S. Szmigiero" <mail@...iej.szmigiero.name>,
	Lee Jones <lee.jones@...aro.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
	Liam Girdwood <lgirdwood@...il.com>
Subject: Re: Tegra boots failing due to as3722 I/O errors

On Wed, Mar 30, 2016 at 02:15:16PM +0100, Jon Hunter wrote:

> On second thoughts, is this the correct way to fix this? I see that
> there are some operators defined for get/set_bypass for a regulator and
> these are not specified for LDO6 either. However, even if they were I
> don't believe this will fix the problem alone.

If this is trying to implement bypass support it should use bypass
support (and the other things doing this fixed to do so).

> The failure is caused by _regulator_get_voltage() returning an error.
> This function does not check if the regulator is bypassed, but I am
> wondering if it should and then return the bypass voltage?

Yes, like we already do for switches.  I'll send an untested patch
shortly.

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