linux-kernel - Re: [PATCH] mfd: twl4030-power: Fix poweroff with PM configuration enabled

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Message-ID: <20141107112549.GA4047@n2100.arm.linux.org.uk>
Date:	Fri, 7 Nov 2014 11:25:49 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Lee Jones <lee.jones@...aro.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org
Subject: Re: [PATCH] mfd: twl4030-power: Fix poweroff with PM configuration
 enabled

On Sun, Nov 02, 2014 at 10:07:56AM -0800, Tony Lindgren wrote:
> Commit e7cd1d1eb16f ("mfd: twl4030-power: Add generic reset
> configuration") enabled configuring the PM features for twl4030.
> 
> This caused poweroff command to fail on devices that have the
> BCI charger on twl4030 wired, or have power wired for VBUS.
> Instead of powering off, the device reboots. This is because
> voltage is detected on charger or VBUS with the default bits
> enabled for the power transition registers.
> 
> To fix the issue, let's just clear VBUS and CHG bits as we want
> poweroff command to keep the system powered off.
> 
> Fixes: e7cd1d1eb16f ("mfd: twl4030-power: Add generic reset configuration")
> Cc: stable@...r.kernel.org # v3.16+
> Reported-by: Russell King <rmk+kernel@....linux.org.uk>
> Signed-off-by: Tony Lindgren <tony@...mide.com>

This fixes the problem for me, thanks.  This needs to go into -rc as
it's a regression between booting non-DT and DT, and stands in the way
of me switching from non-DT booting on OMAP3430.

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