linux-kernel - [PATCH 0/4] usb: davinci: Add PM runtime support and improve HOST only mode support

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Message-ID: <20240528102026.40136-1-bastien.curutchet@bootlin.com>
Date: Tue, 28 May 2024 12:20:22 +0200
From: Bastien Curutchet <bastien.curutchet@...tlin.com>
To: Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Bin Liu <b-liu@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-phy@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	herve.codina@...tlin.com,
	christophercordahi@...ometrics.ca,
	Bastien Curutchet <bastien.curutchet@...tlin.com>
Subject: [PATCH 0/4] usb: davinci: Add PM runtime support and improve HOST only mode support

Hi all,

I've worked on adding PM runtime support on the DAVINCI's USB PHY
controller. It revealed some bugs in the MUSB controller that I fixed in
the last three patches.

The platform I work on uses the MUSB controller in HOST-only mode and has
been designed to save as much energy as possible. To do so, the USB's
VBUS supply can be cut off by toggling a GPIO, this triggers the bug
fixed by patch 2.

If an USB stick gets unplugged, then plugged back while the PHY is in
suspend state, a BABBLE error happens. This BABBLE can't be recovered.
This is fixed by last patch.

Bastien Curutchet (4):
  phy: ti: phy-da8xx-usb: Add runtime PM support
  Revert "usb: musb: da8xx: Set phy in OTG mode by default"
  usb: musb: da8xx: Remove try_idle implementation from host-only mode
  usb: musb: da8xx: Implement BABBLE recovery

 drivers/phy/ti/phy-da8xx-usb.c | 49 ++++++++++++++++++++++++++++++++++
 drivers/usb/musb/da8xx.c       | 20 ++++++++------
 2 files changed, 61 insertions(+), 8 deletions(-)

-- 
2.44.0