linux-kernel - Re: [PATCH 18/18] ipu3: Add driver for dummy INT3472 ACPI device

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4181e6a6-a60f-0a2b-1b46-13a2359d8753@gmail.com>
Date:   Tue, 1 Dec 2020 20:59:53 +0000
From:   Dan Scally <djrscally@...il.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-media@...r.kernel.org, devel@...ica.org, rjw@...ysocki.net,
        lenb@...nel.org, gregkh@...uxfoundation.org,
        mika.westerberg@...ux.intel.com, linus.walleij@...aro.org,
        bgolaszewski@...libre.com, wsa@...nel.org, yong.zhi@...el.com,
        sakari.ailus@...ux.intel.com, bingbu.cao@...el.com,
        tian.shu.qiu@...el.com, mchehab@...nel.org, robert.moore@...el.com,
        erik.kaneda@...el.com, pmladek@...e.com, rostedt@...dmis.org,
        sergey.senozhatsky@...il.com, linux@...musvillemoes.dk,
        kieran.bingham+renesas@...asonboard.com, jacopo+renesas@...ndi.org,
        laurent.pinchart+renesas@...asonboard.com,
        jorhand@...ux.microsoft.com, kitakar@...il.com,
        heikki.krogerus@...ux.intel.com
Subject: Re: [PATCH 18/18] ipu3: Add driver for dummy INT3472 ACPI device

Hi Andy

On 01/12/2020 18:49, Andy Shevchenko wrote:

>  P.S. Dan, can you drop unrelated text when replying?

Ah - sure, sorry.
> Seems we can do this, by locating intel_int3472.c under PDx86 hood and dropping
> ACPI ID table from TPS68470 MFD driver. The PMIC can be instantiated via
> i2c_acpi_new_device() (IIRC the API name).
>
> And actually it makes more sense since it's not and MFD and should not be there.
>
> (Dan, patch wise the one creates intel_int3472.c followed by another one that
>  moves ACPI ID from PMIC and introduces its instantiation via I²C board info
>  structure)

I'm mostly following this, but why would we need an i2c_board_info or
i2c_acpi_new_device()? The INT3472 entries that refer to actual tps68470
devices do have an I2cSerialBusV2 enumerated in _CRS so in their case
there's an i2c device registered with the kernel already.


I think we need those things when we get round to handling the
VCM/EEPROM that's hidden within the sensor's ACPI entry, but I've not
done any work on that yet at all.