[PATCH v3 0/9] Tegra xHCI support

[Andrew Bresticker <abrestic@chromium.org>]

This series adds support for xHCI on NVIDIA Tegra SoCs.  This includes:
 - patches 1 and 2: adding a driver for the mailbox used to communicate
   with the xHCI controller's firmware,
 - patches 3 and 4: extending the XUSB pad controller driver to support
   the USB PHY types (UTMI, HSIC, and USB3),
 - patches 5 and 6: adding a xHCI host-controller driver, and
 - patches 7, 8, and 9: updating the relevant DT files.

The PHY and host drivers have compile-time dependencies on the mailbox
driver, and the host driver has compile-time dependencies on the PHY
driver.  It is probably best if these all get merged through the Tegra
tree.

Based on 3.17-rc3, Jassi Brar's common mailbox framework [0], and my
xHCI modules series [1].

Tested on Venice2, Jetson TK1, and Big with a variety of USB2.0 and
USB3.0 memory sticks and ethernet dongles using controller firmware
recently posted by Andrew Chew [2].

Notes:
 - HSIC support is mostly untested and I think there are still some issues
   to work out there.  I do have a Tegra124 board with a HSIC hub so I'll
   try to sort those out later.
 - The XUSB padctl driver doesn't play nice with the existing Tegra USB2.0
   PHY driver, so all ports should be assigned to the XHCI controller.

Based on work by:
  a lot of people, but from what I can tell from the L4T tree [3], the
  original authors of the Tegra xHCI driver are:
    Ajay Gupta <ajayg@nvidia.com>
    Bharath Yadav <byadav@nvidia.com>

Chagnes from v2:
 - Dropped mailbox channel specifier.  The mailbox driver allocates virtual
   channels backed by the single physical channel.
 - Added support for HS_CURR_LEVEL adjustment pinconfig property, which
   will be required for the Blaze board.
 - Addressed Stephen's review comments.

Changes from v1:
 - Converted mailbox driver to use the common mailbox framework.
 - Fixed up host driver so that it can now be built and used as a module.
 - Addressed Stephen's review comments.
 - Misc. cleanups.

Changes from RFC:
 - Dropped Tegra114 support.
 - Split out mailbox into separate driver.
 - Stopped using child xhci-plat device in xHCI host-controller driver.
 - Added PHY support to Thierry's XUSB padctl driver instead of in a separate
   USB PHY driver.
 - Added Jetson TK1 support.
 - Misc. cleanups.

[0] https://lkml.org/lkml/2014/8/1/200
[1] https://lkml.org/lkml/2014/8/18/504
[2] https://patchwork.ozlabs.org/patch/384013/
[3] git://nv-tegra.nvidia.com/linux-3.10.git

Andrew Bresticker (9):
  of: Add NVIDIA Tegra XUSB mailbox binding
  mailbox: Add NVIDIA Tegra XUSB mailbox driver
  of: Update Tegra XUSB pad controller binding for USB
  pinctrl: tegra-xusb: Add USB PHY support
  of: Add NVIDIA Tegra xHCI controller binding
  usb: xhci: Add NVIDIA Tegra xHCI host-controller driver
  ARM: tegra: Add Tegra124 XUSB mailbox and xHCI controller
  ARM: tegra: jetson-tk1: Add xHCI support
  ARM: tegra: venice2: Add xHCI support

 .../bindings/mailbox/nvidia,tegra124-xusb-mbox.txt |   32 +
 .../pinctrl/nvidia,tegra124-xusb-padctl.txt        |   56 +-
 .../bindings/usb/nvidia,tegra124-xhci.txt          |  104 ++
 arch/arm/boot/dts/tegra124-jetson-tk1.dts          |   48 +-
 arch/arm/boot/dts/tegra124-venice2.dts             |   79 +-
 arch/arm/boot/dts/tegra124.dtsi                    |   41 +
 drivers/mailbox/Kconfig                            |    3 +
 drivers/mailbox/Makefile                           |    2 +
 drivers/mailbox/tegra-xusb-mailbox.c               |  290 +++++
 drivers/pinctrl/Kconfig                            |    1 +
 drivers/pinctrl/pinctrl-tegra-xusb.c               | 1233 +++++++++++++++++++-
 drivers/usb/host/Kconfig                           |    9 +
 drivers/usb/host/Makefile                          |    1 +
 drivers/usb/host/xhci-tegra.c                      |  905 ++++++++++++++
 include/dt-bindings/pinctrl/pinctrl-tegra-xusb.h   |   20 +
 include/soc/tegra/xusb.h                           |   53 +
 16 files changed, 2796 insertions(+), 81 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt
 create mode 100644 Documentation/devicetree/bindings/usb/nvidia,tegra124-xhci.txt
 create mode 100644 drivers/mailbox/tegra-xusb-mailbox.c
 create mode 100644 drivers/usb/host/xhci-tegra.c
 create mode 100644 include/soc/tegra/xusb.h

-- 
2.1.0.rc2.206.gedb03e5