linux-kernel - Re: [PATCH v2 15/20] i2c: cht-wc: Make charger i2c-client instantiation board/device-model specific

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Message-ID: <af5c448d-0552-abb7-eaf3-8c95116d7733@redhat.com>
Date:   Sun, 28 Nov 2021 15:04:17 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Wolfram Sang <wsa@...-dreams.de>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Mark Gross <markgross@...nel.org>,
        Andy Shevchenko <andy@...radead.org>,
        Sebastian Reichel <sre@...nel.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Ard Biesheuvel <ardb@...nel.org>, Len Brown <lenb@...nel.org>,
        linux-acpi@...r.kernel.org, Yauhen Kharuzhy <jekhor@...il.com>,
        Tsuchiya Yuto <kitakar@...il.com>,
        platform-driver-x86@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-efi@...r.kernel.org
Subject: Re: [PATCH v2 15/20] i2c: cht-wc: Make charger i2c-client
 instantiation board/device-model specific

Hi,

On 11/23/21 09:24, Wolfram Sang wrote:
> On Sun, Nov 14, 2021 at 06:03:30PM +0100, Hans de Goede wrote:
>> The i2c-controller on the Cherry Trail - Whiskey Cove PMIC is special
>> in that it is always connected to the I2C charger IC of the board on
>> which the PMIC is used; and the charger IC is not described in ACPI,
>> so the i2c-cht-wc code needs to instantiate an i2c-client for it itself.
>>
>> So far this was hardcoded to instantiate an i2c-client for the
>> bq24292i, with all properties, etc. set to match how this charger
>> is used on the GPD win and GPD pcoket devices.
>>
>> There is a rudimentary check to make sure the ACPI tables are at least
>> somewhat as expected, but this is far from accurate, leading to
>> a wrong i2c-client being instantiated for the charger on some boards.
>>
>> Switch to the new DMI based intel_cht_wc_get_model() helper which is
>> exported by the MFD driver for the CHT Whiskey Cove PMIC to help PMIC
>> cell drivers like the i2c-cht-wc code reliably detect which board
>> they are running on.
>>
>> And add board_info for the charger ICs as found on the other 2 known
>> boards with a Whisky Cove PMIC.
>>
>> This has been tested on all 3 known boards.
>>
>> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
> 
> Here is my Ack to take this via some other tree:
> 
> Acked-by: Wolfram Sang <wsa@...nel.org>

Great, thank you.

> No need to send further versions of this series to the i2c-list, I'd
> think.

Ok I will drop the i2c-list from the Cc for further versions of this series.

Regards,

Hans