linux-kernel - Re: [PATCH] dt-bindings: serial: Describe ARM dcc interface

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Message-ID: <170319311633.101509.1532196763061569676.robh@kernel.org>
Date: Thu, 21 Dec 2023 15:11:56 -0600
From: Rob Herring <robh@...nel.org>
To: Michal Simek <michal.simek@....com>
Cc: linux-kernel@...r.kernel.org, michal.simek@...inx.com, Conor Dooley <conor+dt@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jiri Slaby <jirislaby@...nel.org>, linux-serial@...r.kernel.org, monstr@...str.eu, Rob Herring <robh+dt@...nel.org>, git@...inx.com, devicetree@...r.kernel.org, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Subject: Re: [PATCH] dt-bindings: serial: Describe ARM dcc interface


On Thu, 21 Dec 2023 15:05:09 +0100, Michal Simek wrote:
> Debug Communication Channel (DCC) provides the way how to pass data between
> target CPU and host via JTAG interface. Every CPU has own interface for
> communication via dbgdtrtx_el0 and dbgdtrrx_el0 registers.
> 
> Signed-off-by: Michal Simek <michal.simek@....com>
> ---
> 
> This communication interface is used for flash programming on Xilinx
> SOCs from U-Boot.
> https://source.denx.de/u-boot/u-boot/-/blob/master/drivers/serial/arm_dcc.c
> 
> ---
>  .../devicetree/bindings/serial/arm,dcc.yaml   | 30 +++++++++++++++++++
>  1 file changed, 30 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/serial/arm,dcc.yaml
> 

Reviewed-by: Rob Herring <robh@...nel.org>