linux-kernel - Re: [v2 PATCH 1/4] Documentation: bindings: add dt doc for Rockchip USB Type-C PHY

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Date:	Thu, 16 Jun 2016 00:11:11 +0200
From:	Heiko Stuebner <heiko@...ech.de>
To:	Chris Zhong <zyw@...k-chips.com>
Cc:	dianders@...omium.org, tfiga@...omium.org, yzq@...k-chips.com,
	groeck@...omium.org, linux-rockchip@...ts.infradead.org,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [v2 PATCH 1/4] Documentation: bindings: add dt doc for Rockchip USB Type-C PHY

Am Montag, 13. Juni 2016, 17:39:46 schrieb Chris Zhong:
> This patch adds a binding that describes the Rockchip USB Type-C PHY
> for rk3399
> 
> Signed-off-by: Chris Zhong <zyw@...k-chips.com>
> 
> ---
> 
> Changes in v2:
> - add some registers description
> 
> Changes in v1:
> - add extcon node description
> - move the registers in phy driver
> - remove the suffix of reset
> 
>  .../devicetree/bindings/phy/phy-rockchip-typec.txt | 77
> ++++++++++++++++++++++ 1 file changed, 77 insertions(+)
>  create mode 100644
> Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt
> 
> diff --git a/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt
> b/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt new file
> mode 100644
> index 0000000..430920c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt
> @@ -0,0 +1,77 @@
> +* ROCKCHIP type-c PHY
> +---------------------
> +
> +Required properties:
> + - compatible : should be "rockchip,rk3399-typec-phy0" or
> +			 "rockchip,rk3399-typec-phy1"
> + - reg: Address and length of the usb phy control register set
> + - rockchip,grf : phandle to the syscon managing the "general
> +   register files"
> + - clocks : phandle + clock specifier for the phy clocks
> + - clock-names : string, clock name, must be "tcpdcore", "tcpdphy_ref";
> + - resets : a list of phandle + reset specifier pairs
> + - reset-names : string reset name, must be:
> +		 "tcphy", "tcphy_pipe", "uphy_tcphy"
> + - #phy-cells : Must be 0.  See ./phy-bindings.txt for details.
> + - extcon : extcon specifier for the Power Delivery
> +
> +Note, there are 2 type-c phys for RK3399, and they are almost identical,
> except +these registers(description below), every register node contains
> 3 sections: +offset, enable bit, write mask bit.
> + - rockchip,typec_conn_dir : the register of type-c connector direction,
> +   for type-c phy0, it must be <0xe580 0 16>;
> +   for type-c phy1, it must be <0xe58c 0 16>;

I think I said this already, but these register-lists would be much happier 
being defined inside the driver - see how Frank managed this on his usb2phy 
please.

Heiko