From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rob Herring <robh@kernel.org>
Subject: Re: [PATCH v4 6/9] dt-bindings: display: hdmi-connector: Add DDC
 power supply
Date: Fri, 26 Apr 2019 13:23:37 -0500
Message-ID: <20190426182337.GA22245@bogus>
References: <20190413165418.27880-1-megous@megous.com>
 <20190413165418.27880-7-megous@megous.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Return-path: <linux-kernel-owner@vger.kernel.org>
Content-Disposition: inline
In-Reply-To: <20190413165418.27880-7-megous@megous.com>
Sender: linux-kernel-owner@vger.kernel.org
To: megous@megous.com
Cc: linux-sunxi@googlegroups.com, Maxime Ripard <maxime.ripard@bootlin.com>, Chen-Yu Tsai <wens@csie.org>, Linus Walleij <linus.walleij@linaro.org>, David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>, Mark Rutland <mark.rutland@arm.com>, Giuseppe Cavallaro <peppe.cavallaro@st.com>, Alexandre Torgue <alexandre.torgue@st.com>, Jose Abreu <joabreu@synopsys.com>, "David S. Miller" <davem@davemloft.net>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-gpio@vger.kernel.org
List-Id: linux-gpio@vger.kernel.org

On Sat, Apr 13, 2019 at 06:54:15PM +0200, megous@megous.com wrote:
> From: Ondrej Jirman <megous@megous.com>
> 
> Some Allwinner SoC using boards (Orange Pi 3 for example) need to enable
> on-board voltage shifting logic for the DDC bus to be usable. Use
> ddc-supply on the hdmi-connector to model this.
> 
> Add binding documentation for optional ddc-supply property.
> 
> Signed-off-by: Ondrej Jirman <megous@megous.com>
> ---
>  .../devicetree/bindings/display/connector/hdmi-connector.txt     | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt b/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt
> index 508aee461e0d..33085aeb0bb9 100644
> --- a/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt
> +++ b/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt
> @@ -9,6 +9,7 @@ Optional properties:
>  - label: a symbolic name for the connector
>  - hpd-gpios: HPD GPIO number
>  - ddc-i2c-bus: phandle link to the I2C controller used for DDC EDID probing
> +- ddc-supply: the power supply for the DDC bus

It's not just for DDC. It powers the chips in bridge dongles for 
example. Pretty much every diagram I find just calls it 5V or +5V.

So how about '5V-supply' or 'v5V-supply'?

Rob