linux-kernel - Re: [PATCH v2] ARM: dts: BCM5301X: Make usb3 phy use mdio phy driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 9 May 2018 08:08:06 -0400
From:   Vivek Unune <npcomplete13@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     hauke@...ke-m.de, zajec5@...il.com, jonmason@...adcom.com,
        bcm-kernel-feedback-list@...adcom.com, robh+dt@...nel.org,
        mark.rutland@....com, linux@...linux.org.uk,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ARM: dts: BCM5301X: Make usb3 phy use mdio phy driver

On Wed, Apr 18, 2018 at 03:31:17PM -0700, Florian Fainelli wrote:
> On 04/09/2018 03:31 PM, Vivek Unune wrote:
> > Currently, usb3 phy in bcm5301x.dtsi uses platform driver which
> > requires register range "ccb-mii" <0x18003000 0x1000>. This range
> > overlaps with mdio cmd and param registers (<0x18003000 0x8>).
> > Essentially, the platform driver partly acts like a mdio bus
> > driver, hence to use of this register range.
> > 
> > In some Northstar devices like Linksys EA9500, secondary switch
> > is connected via external mdio. The only way to access and
> > configure the external switch is via mdio bus. When we enable the
> > mdio bus in it's current state, the mdio bus and any child buses
> > fail to register because of the register range overlap.
> > 
> > On Northstar, the usb3 phy is connected at address 0x10 on the
> > internal mdio bus. This change moves the usb3_phy node and makes
> > it a child node of internal mdio bus.
> > 
> > Thanks to Rafał Miłecki's commit af850e14a7ae
> > ("phy: bcm-ns-usb3: add MDIO driver using proper bus layer") the
> > same usb3 platform driver can now act as usb3 phy mdio driver.
> > 
> > Tested on Linksys Panamera (EA9500)
> > 
> > Signed-off-by: Vivek Unune <npcomplete13@...il.com>
> > ---
> > v2: Disabled usb3_phy by default, then enabled in dts where
> >     necessary
> 
> Rafal, Hauke, this looks good to me, can you review? Thanks
> -- 
> Florian

Rafał, Hauke,

I'm sure you are super busy :) Just want to bring this to your
attention. 

Thanks,

Vivek