linux-kernel - Re: [PATCH 2/2] arm64: dts: rockchip: Add initial support for Pine64 PinePhone Pro

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Date:   Sun, 29 May 2022 13:45:52 +1000
From:   Tom Fitzhenry <tom@...-fitzhenry.me.uk>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        linux-rockchip@...ts.infradead.org
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Samuel Holland <samuel@...lland.org>,
        Ondrej Jirman <x@....cz>, Martijn Braam <martijn@...xit.nl>
Subject: Re: [PATCH 2/2] arm64: dts: rockchip: Add initial support for Pine64
 PinePhone Pro

I've sent this DT for early feedback. I've commented below on the parts 
I'm unsure about, and would appreciate any feedback.

On 29/5/22 13:17, Tom Fitzhenry wrote:
> +	cluster1_opp_ppp: opp-table1b {

I don't know which OPP should be used.

Per 
https://gitlab.com/pine64-org/linux/-/merge_requests/36/diffs?commit_id=dcf78ea8ad6f0b1c6e3279d8d752ca68d6d05756, 
using the regular RK3399 OPP table exceeds operating conditions.

Perhaps this should depend on an OPP for RK3399-T (which would need to 
be added, as the linked merge request proposes).

> +	// Per "TYPE-C", page 23.
> +	fusb0: typec-portc@22 {
> +		compatible = "fcs,fusb302";
> +		reg = <0x22>;
> +		interrupt-parent = <&gpio1>;
> +		interrupts = <RK_PA2 IRQ_TYPE_LEVEL_LOW>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&fusb0_int>;
> +		vbus-supply = <&vcc5v0_typec>;

This is the node many PinePhone Pro users have been using for >1 month, 
but I don't understand the USB subsystem well enough yet to understand 
the node.