linux-kernel - Re: [PATCH v3] ARM: dts: rockchip: Add usb host0 ohci node for rk3288

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Date:   Thu, 23 Jul 2020 00:16:55 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Heiko Stuebner <heiko@...ech.de>,
        Robin Murphy <robin.murphy@....com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Suniel Mahesh <sunil@...rulasolutions.com>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-amarula <linux-amarula@...rulasolutions.com>,
        William Wu <william.wu@...k-chips.com>
Subject: Re: [PATCH v3] ARM: dts: rockchip: Add usb host0 ohci node for rk3288

Hi Heiko,

On Thu, Jul 23, 2020 at 12:04 AM Heiko Stuebner <heiko@...ech.de> wrote:
>
> Hi Jaganm
>
> Am Montag, 20. Juli 2020, 12:58:46 CEST schrieb Jagan Teki:
> > rk3288 and rk3288w have a usb host0 ohci controller.
> >
> > Although rk3288 ohci doesn't actually work on hardware, but
> > rk3288w ohci can work well.
> >
> > So add usb host0 ohci node in rk3288 dtsi and the quirk in
> > ohci platform driver will disable ohci on rk3288.
>
> If I remember the discussion correctly, we expect the board dts
> or the bootloader to enable the ohci, right?
> So that block go away ... just making sure, I don't remember
> untrue stuff ;-)

Our (with Robin) initial discussion [1] is to manage OHCI enablement
in the bootloader but since it requires many checks at bootloader
level we finally rely on board dts to enable it as normal.

[1] https://lkml.org/lkml/2020/7/3/424

Jagan.