linux-kernel - Re: [PATCH 0/2] use correct values for startup time bits for AXP22X/AXP8XX PEKs

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Message-ID: <ce4d0385-a88b-d0cf-ee99-8b4b93f11244@free-electrons.com>
Date:   Mon, 17 Jul 2017 13:15:07 +0200
From:   Quentin Schulz <quentin.schulz@...e-electrons.com>
To:     dmitry.torokhov@...il.com, wens@...e.org, lee.jones@...aro.org
Cc:     hdegoede@...hat.com, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, thomas.petazzoni@...e-electrons.com,
        maxime.ripard@...e-electrons.com
Subject: Re: [PATCH 0/2] use correct values for startup time bits for
 AXP22X/AXP8XX PEKs

Hi all,

On 17/07/2017 11:53, Quentin Schulz wrote:
> According to their datasheets, the AXP221, AXP223, AXP288, AXP803,
> AXP809 and AXP813 PEK have different values for startup time bits from
> the AXP20X PEK (which are currently used for all the aforementioned PMICs).
> 
> This patch series adds support for platform_device_id to axp20x-pek driver
> to support different startup time bits depending on PMIC's variant and set
> the correct platform_device_id in the mfd.
> 
> This has been tested on AXP813. To perform the test, modify the value of
> startup and/or shutdown of the pek in sysfs. Press the button soldered to
> PEK input of the AXP the amount of time you set in sysfs. The PMIC shuts
> down the board without needing to unplug any power supply. Press PEK button
> the amount of time you set in sysfs for startup and the PMIC will start the
> board. Note that the time bits are obivoulsy hardware reset to their
> default when you unplug all power supplies from the board.
> 

I forgot to add that it depends on this patch series (particularly the
third patch (3/6) "mfd: axp20x: Add support for AXP813 PMIC") from
Chen-Yu:
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1428284.html

Quentin

> Thanks,
> Quentin
> 
> Quentin Schulz (2):
>   Input: axp20x-pek: add support for AXP221 PEK
>   mfd: axp20x: use correct platform device id for many PEK
> 
>  drivers/input/misc/axp20x-pek.c | 62 ++++++++++++++++++++++++++++++++++-------
>  drivers/mfd/axp20x.c            | 12 ++++----
>  2 files changed, 58 insertions(+), 16 deletions(-)
> 

-- 
Quentin Schulz, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com