linux-kernel - Re: [PATCH 4.4 51/97] mfd: palmas: Reset the POWERHOLD mux during power off

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Date:   Tue, 03 Apr 2018 21:49:14 +0100
From:   Ben Hutchings <ben.hutchings@...ethink.co.uk>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org, Keerthy <j-keerthy@...com>,
        Lee Jones <lee.jones@...aro.org>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: Re: [PATCH 4.4 51/97] mfd: palmas: Reset the POWERHOLD mux during
 power off

On Fri, 2018-03-23 at 10:54 +0100, Greg Kroah-Hartman wrote:
> 4.4-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Keerthy <j-keerthy@...com>
> 
> 
> [ Upstream commit 85fdaf8eb9bbec1f0f8a52fd5d85659d60738816 ]
> 
> POWERHOLD signal has higher priority  over the DEV_ON bit.
> So power off will not happen if the POWERHOLD is held high.
> Hence reset the MUX to GPIO_7 mode to release the POWERHOLD
> and the DEV_ON bit to take effect to power off the PMIC.
> 
> PMIC Power off happens in dire situations like thermal shutdown
> so irrespective of the POWERHOLD setting go ahead and turn off
> the powerhold.  Currently poweroff is broken on boards that have
> powerhold enabled. This fixes poweroff on those boards.
[...]

This is not very useful by itself; I think you should pick these too:

[3.18]
0ea66f76ba17 Documentation: pinctrl: palmas: Add ti,palmas-powerhold-override property definition
7c62de5f3fc9 ARM: dts: dra7: Add power hold and power controller properties to palmas

[4.4]
0ea66f76ba17 Documentation: pinctrl: palmas: Add ti,palmas-powerhold-override property definition
1f166499ce00 ARM: dts: am57xx-beagle-x15-common: Add overide powerhold property
- apply the changes in am57xx-beagle-x15.dts
7c62de5f3fc9 ARM: dts: dra7: Add power hold and power controller properties to palmas

[4.9]
0ea66f76ba17 Documentation: pinctrl: palmas: Add ti,palmas-powerhold-override property definition
1f166499ce00 ARM: dts: am57xx-beagle-x15-common: Add overide powerhold property
8804755bfb1f ARM: dts: am57xx-idk-common: Add overide powerhold
property
7c62de5f3fc9 ARM: dts: dra7: Add power hold and power controller properties to palmas

None of the above are needed for 4.14 and 4.15, but they do have one
more board that needed this property, so please pick this:

aac4619d028e ARM: dts: DRA76-EVM: Set powerhold property for tps65917

Ben.

-- 
Ben Hutchings
Software Developer, Codethink Ltd.