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Date:   Wed, 2 Feb 2022 19:14:08 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     nick.hawkins@....com
Cc:     verdun@....com, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Corey Minyard <minyard@....org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-K├Ânig 
        <u.kleine-koenig@...gutronix.de>, Lee Jones <lee.jones@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Brown <broonie@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
        soc@...nel.org, Shawn Guo <shawnguo@...nel.org>,
        Stanislav Jakubek <stano.jakubek@...il.com>,
        Hao Fang <fanghao11@...wei.com>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        Mark Rutland <mark.rutland@....com>,
        Marc Zyngier <maz@...nel.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Wang Kefeng <wangkefeng.wang@...wei.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-i2c@...r.kernel.org,
        openipmi-developer@...ts.sourceforge.net,
        linux-mtd@...ts.infradead.org, netdev@...r.kernel.org,
        linux-pwm@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-spi@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-watchdog@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] HPE BMC GXP SUPPORT

Hi Nick,

good to see all this stuff coming mainline,

On Wed, Feb 02, 2022 at 10:52:50AM -0600, nick.hawkins@....com wrote:
> From: Nick Hawkins <nick.hawkins@....com>
> 
> GXP is the name of the HPE SoC.
> This SoC is used to implement BMC features of HPE servers
> (all ProLiant, Synergy, and many Apollo, and Superdome machines)
> It does support many features including:
> 	ARMv7 architecture, and it is based on a Cortex A9 core
> 	Use an AXI bus to which
> 		a memory controller is attached, as well as
>                  multiple SPI interfaces to connect boot flash,
>                  and ROM flash, a 10/100/1000 Mac engine which
>                  supports SGMII (2 ports) and RMII
> 		Multiple I2C engines to drive connectivity with a host infrastructure
> 		A video engine which support VGA and DP, as well as
>                  an hardware video encoder
> 		Multiple PCIe ports
> 		A PECI interface, and LPC eSPI
> 		Multiple UART for debug purpose, and Virtual UART for host connectivity
> 		A GPIO engine
> This Patch Includes:
> 	Documentation for device tree bindings
> 	Device Tree Bindings
> 	GXP Timer Support
> 	GXP Architecture Support
> 
> Signed-off-by: Nick Hawkins <nick.hawkins@....com>
> ---
>  .../bindings/display/hpe,gxp-thumbnail.txt    |  21 +
>  .../devicetree/bindings/gpio/hpe,gxp-gpio.txt |  16 +
...

All new bindings must be in the DT-schema format (yaml files).
This enables a lot of syntax checks and validation.

We are slowly migrating away from the .txt based bindings.

Also, for new bindings please follow the guide lines listed in
Documentation/devicetree/bindings/submitting-patches.rst

Consider including the bindings with the drivers using the bindings so
things have a more natural split.

	Sam

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