linux-kernel - Re: [PATCH v4 13/13] phy: usb: Add support for wake and USB low power mode for 7211 S2/S5

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Date:   Fri, 3 Jan 2020 10:28:49 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Al Cooper <alcooperx@...il.com>, linux-kernel@...r.kernel.org
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE" 
        <bcm-kernel-feedback-list@...adcom.com>,
        Srinath Mannam <srinath.mannam@...adcom.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:BROADCOM BCM7XXX ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v4 13/13] phy: usb: Add support for wake and USB low power
 mode for 7211 S2/S5

On 1/3/20 10:18 AM, Al Cooper wrote:
> Add support for 7211 USB wake. Disable all possible 7211 USB logic
> for S2/S5 if USB wake is not enabled.
> 
> On the 7211, the XHCI wake signal was not connected properly and
> only goes to the USB1_USB1_CTRL_TP_DIAG1 diagonstic register.
> The workaround is to have VPU code running that polls for the
> proper bit in the DIAG register and to wake the system when
> the bit is asserted.
> 
> Signed-off-by: Al Cooper <alcooperx@...il.com>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian