From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Michal Simek <michal.simek@amd.com>,
linux-kernel@vger.kernel.org, monstr@monstr.eu,
michal.simek@xilinx.com, git@xilinx.com
Cc: Conor Dooley <conor+dt@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jirislaby@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
devicetree@vger.kernel.org, linux-serial@vger.kernel.org
Subject: Re: [PATCH] dt-bindings: serial: Describe ARM dcc interface
Date: Fri, 22 Dec 2023 09:20:09 +0100 [thread overview]
Message-ID: <de6370c5-5cd1-409a-8716-99dd7738d30d@linaro.org> (raw)
In-Reply-To: <9d7e85914eb1cdb313b28cb019093a84dd9b4773.1703167505.git.michal.simek@amd.com>
On 21/12/2023 15:05, 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@amd.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
>
> diff --git a/Documentation/devicetree/bindings/serial/arm,dcc.yaml b/Documentation/devicetree/bindings/serial/arm,dcc.yaml
> new file mode 100644
> index 000000000000..fd0589356617
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/arm,dcc.yaml
> @@ -0,0 +1,30 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/serial/arm,dcc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ARM DCC (Data communication channel) serial emulation
> +
> +maintainers:
> + - Michal Simek <michal.simek@amd.com>
> +
> +description: |
> + ARM DCC (Data communication channel) serial emulation interface available
> + via JTAG can be also used as one of serial line tightly coupled with every
> + ARM CPU available in the system.
> +
> +properties:
> + compatible:
> + const: arm,dcc
> +
> +required:
> + - compatible
no allOf: with $ref to serial.yaml? Does it differ somehow?
Best regards,
Krzysztof
next prev parent reply other threads:[~2023-12-22 8:20 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-21 14:05 [PATCH] dt-bindings: serial: Describe ARM dcc interface Michal Simek
2023-12-21 21:11 ` Rob Herring
2023-12-22 8:20 ` Krzysztof Kozlowski [this message]
2024-01-02 15:32 ` Michal Simek
2024-01-03 20:22 ` Rob Herring
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