linux-kernel - Re: [PATCH 1/2] dt-bindings: phy-mtk-tphy: add the property about force

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Message-ID: <20200429213034.GA29572@bogus>
Date:   Wed, 29 Apr 2020 16:30:34 -0500
From:   Rob Herring <robh@...nel.org>
To:     Macpaul Lin <macpaul.lin@...iatek.com>
Cc:     Min Guo <min.Guo@...iatek.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org,
        Mediatek WSD Upstream <wsd_upstream@...iatek.com>,
        Macpaul Lin <macpaul.lin@...il.com>
Subject: Re: [PATCH 1/2] dt-bindings: phy-mtk-tphy: add the property about
 force_vbus

On Fri, Apr 17, 2020 at 01:23:05PM +0800, Macpaul Lin wrote:
> For some platforms, they don't have vbus pin connection between usb's phy
> and mac. Hence we need to control force_vbus related registers to keep
> hardware works normal.
> This patch add the required bool property force_vbus.
> 
> Signed-off-by: Macpaul Lin <macpaul.lin@...iatek.com>
> ---
>  Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
> index dd75b676b71d..6b49b651becc 100644
> --- a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
> +++ b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
> @@ -37,6 +37,9 @@ Optional properties (controller (parent) node):
>  		  calibrate
>   - mediatek,src-coef	: coefficient for slew rate calibrate, depends on
>  		  SoC process
> + - force_vbus	: if the platform has no vbus connection between phy and mac,

mediatek,force-vbus

This is board specific? If SoC specific, you should drop and imply this 
from the compatible string.

> +		  (force_vbus mode), then this property should be exist.
> +		  Otherwise not to add this property.
>  
>  Required properties (port (child) node):
>  - reg		: address and length of the register set for the port.
> -- 
> 2.18.0