linux-kernel - Re: [PATCH v3 0/4] add device drivers for Siemens Industrial PCs

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Message-ID: <20210329200001.7b65e4af@md1za8fc.ad001.siemens.net>
Date:   Mon, 29 Mar 2021 20:00:01 +0200
From:   Henning Schild <henning.schild@...mens.com>
To:     <linux-kernel@...r.kernel.org>, <linux-leds@...r.kernel.org>,
        <platform-driver-x86@...r.kernel.org>,
        <linux-watchdog@...r.kernel.org>
Cc:     Srikanth Krishnakar <skrishnakar@...il.com>,
        Jan Kiszka <jan.kiszka@...mens.com>,
        "Gerd Haeussler" <gerd.haeussler.ext@...mens.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Mark Gross <mgross@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Pavel Machek <pavel@....cz>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Enrico Weigelt <lkml@...ux.net>
Subject: Re: [PATCH v3 0/4] add device drivers for Siemens Industrial PCs

Guys,

sorry for the delay. This one did in fact not change too much after all.

The biggest points that are still kind of open are the naming of the
LEDs. If what is proposed here is acceptable it is not open from my
side.

The other big point was "using a generic gpio" driver as a basis. My
current understanding of that point is, that such a driver does not yet
exist. Meaning an introduction of the abstractions can and probably
should wait for a second user. Without the second user it is just hard
to test and find the right abstraction, plus we will end up with more
code meaning more work for everyone.

regards,
Henning

Am Mon, 29 Mar 2021 19:49:24 +0200
schrieb Henning Schild <henning.schild@...mens.com>:

> changes since v2:
> 
> - remove "simatic-ipc" prefix from LED names
> - fix style issues found in v2, mainly LED driver
> - fix OEM specific dmi code, and remove magic numbers
> - more "simatic_ipc" name prefixing
> - improved pmc quirk code using callbacks
> 
> changes since v1:
> 
> - fixed lots of style issues found in v1
>   - (debug) printing
>   - header ordering
> - fixed license issues GPLv2 and SPDX in all files
> - module_platform_driver instead of __init __exit
> - wdt simplifications cleanup
> - lots of fixes in wdt driver, all that was found in v1
> - fixed dmi length in dmi helper
> - changed LED names to allowed ones
> - move led driver to simple/
> - switched pmc_atom to dmi callback with global variable
> 
> --
> 
> This series adds support for watchdogs and leds of several x86 devices
> from Siemens.
> 
> It is structured with a platform driver that mainly does
> identification of the machines. It might trigger loading of the
> actual device drivers by attaching devices to the platform bus.
> 
> The identification is vendor specific, parsing a special binary DMI
> entry. The implementation of that platform identification is applied
> on pmc_atom clock quirks in the final patch.
> 
> It is all structured in a way that we can easily add more devices and
> more platform drivers later. Internally we have some more code for
> hardware monitoring, more leds, watchdogs etc. This will follow some
> day.
> 
> Henning Schild (4):
>   platform/x86: simatic-ipc: add main driver for Siemens devices
>   leds: simatic-ipc-leds: add new driver for Siemens Industial PCs
>   watchdog: simatic-ipc-wdt: add new driver for Siemens Industrial PCs
>   platform/x86: pmc_atom: improve critclk_systems matching for Siemens
>     PCs
> 
>  drivers/leds/Kconfig                          |   3 +
>  drivers/leds/Makefile                         |   3 +
>  drivers/leds/simple/Kconfig                   |  11 +
>  drivers/leds/simple/Makefile                  |   2 +
>  drivers/leds/simple/simatic-ipc-leds.c        | 202 ++++++++++++++++
>  drivers/platform/x86/Kconfig                  |  12 +
>  drivers/platform/x86/Makefile                 |   3 +
>  drivers/platform/x86/pmc_atom.c               |  57 +++--
>  drivers/platform/x86/simatic-ipc.c            | 169 ++++++++++++++
>  drivers/watchdog/Kconfig                      |  11 +
>  drivers/watchdog/Makefile                     |   1 +
>  drivers/watchdog/simatic-ipc-wdt.c            | 215
> ++++++++++++++++++ .../platform_data/x86/simatic-ipc-base.h      |
> 29 +++ include/linux/platform_data/x86/simatic-ipc.h |  72 ++++++
>  14 files changed, 769 insertions(+), 21 deletions(-)
>  create mode 100644 drivers/leds/simple/Kconfig
>  create mode 100644 drivers/leds/simple/Makefile
>  create mode 100644 drivers/leds/simple/simatic-ipc-leds.c
>  create mode 100644 drivers/platform/x86/simatic-ipc.c
>  create mode 100644 drivers/watchdog/simatic-ipc-wdt.c
>  create mode 100644 include/linux/platform_data/x86/simatic-ipc-base.h
>  create mode 100644 include/linux/platform_data/x86/simatic-ipc.h
>