linux-kernel - Re: [PATCH] HPE BMC GXP SUPPORT

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Message-ID: <YfrJ8JWjyH9ptV4z@ravnborg.org>
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>,
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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