[U-Boot] [PATCH v2 0/4] Migrate Vybrid USB driver to driver model

[Sanchayan Maity <maitysanchayan@gmail.com>]

Hello,

This is the second version of the patchset for migrating Vybrid
USB driver to driver model.

Compare to the first version, this version takes care of dr_mode
property and correctly handles OTG as well when gpio is specified
for use as ID detection pin. This is an essential requirement for
OTG as Vybrid USB controller is not a true OTG though it can be
configured as either host or device. The ID pin which is unique
for OTG operation is not present on Vybrid.

The problem with client that I was observing was related to sequence
numbers. While trying to implement the OTG functionality I observed
that if during probe of USB0 if it returns ENODEV, the probe of USB1
provides a sequence number of 0 while we expect 1. The code relies
on sequence numbers for initialising the appropriate peripherals.
I use the bind operation to force a sequence number. This also seems
to solve the problems I was having with USB client and mentioned
in the previous version of the patchset.

Host and client functionality are both functional with this patch.
Patch series is based on top of latest u-boot master at the moment
of this writing. Tested on Toradex Colibri Vybrid VF61 module.

Thanks to Lukasz and Stefan for their comments.

V1 Patches:
[1].
https://patchwork.ozlabs.org/patch/655370/
[2].
https://patchwork.ozlabs.org/patch/655371/
[3].
https://patchwork.ozlabs.org/patch/655372/
[4].
https://patchwork.ozlabs.org/patch/655373/

Sanchayan Maity (4):
  usb: host: ehci-vf: Migrate Vybrid USB to driver model
  ARM: dts: vf: Add device tree node for USB on Vybrid
  ARM: dts: vf-colibri: Enable USB device tree node for Colibri Vybrid
  configs: colibri_vf_defconfig: Enable USB driver model for Colibri Vybrid

 arch/arm/dts/vf-colibri.dtsi |  11 +++
 arch/arm/dts/vf.dtsi         |  14 +++
 configs/colibri_vf_defconfig |   1 +
 drivers/usb/host/ehci-vf.c   | 208 +++++++++++++++++++++++++++++++++++++++++--
 4 files changed, 227 insertions(+), 7 deletions(-)

-- 
2.9.2