linux-kernel - [PATCH 0/3] USB: musb: dsps: phy fix and DT-topology support

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Date:   Fri, 13 Apr 2018 17:15:02 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Bin Liu <b-liu@...com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Arnd Bergmann <arnd@...db.de>,
        Kishon Vijay Abraham I <kishon@...com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan@...nel.org>
Subject: [PATCH 0/3] USB: musb: dsps: phy fix and DT-topology support

I've been carrying a patch out-of-tree since my work on improving the
USB device-tree support which is needed to be able to describe USB
topologies for musb based controllers.

This patch, which associates the platform controller device with the
glue device device-tree node, did not play well with the recent changes
which added generic phy support to USB core however.

Like the recent dwc2 regression fixed by Arnd after the device-tree
#phy-cell changes, the generic phy code in USB core can now also fail
indefinitly with -EPROBE_DEFER when the controller uses a legacy USB
phy.

The second patch addresses this for musb, which handles its own (legacy
and generic) phys, but something more may possibly now be needed for
other platforms with legacy phys.

In the process of debugging this, I stumbled over another issue which
caused the dsps legacy phy init two be called twice on every probe and
which is fixed by the first patch.

Johan

Johan Hovold (3):
  USB: musb: dsps: drop duplicate phy initialisation
  USB: musb: host: prevent core phy initialisation
  USB: musb: dsps: propagate device-tree node

 drivers/usb/musb/musb_dsps.c | 3 +--
 drivers/usb/musb/musb_host.c | 1 +
 2 files changed, 2 insertions(+), 2 deletions(-)

-- 
2.17.0