Add support for QCA IPQ806x Ethernet GMAC controller

This patch set adds support for the integrated Ethernet GMAC controller on QCA IPQ806x SoC. This controller is based on a Gigabit Synopsys DesignWare IP, already supported in the stmmac driver located in drivers/net/ethernet/stmicro/stmmac.

This change is done as a follow-up to the following thread:
*http://www.spinics.net/lists/netdev/msg311265.html
While previous attempt was creating a new driver to drive this controller, this new post leverages the existing stmmac driver by implementing the SoC specific glue to it.

Aside from the pure stmmac glue layer, we have a couple of related patches:
*IPQ806x NSS clock addition is cherry-picked and refreshed from the
following thread: https://lkml.org/lkml/2014/8/6/390
*phy-handle and fixed-link support are also added in this change set so the
driver can be fully functional on platforms using device-trees as well as ethernet switches.

V2:
*Fix MODULE_LICENSE to "Dual BSD/GPL" as the dwmac-ipq806x.c is using
ISC license.

Mathieu Olivari (4):
stmmac: add phy-handle support to the platform layer
stmmac: add fixed-link device-tree support
stmmac: add ipq806x glue layer
net: stmmac: ipq806x: document device tree bindings

Stephen Boyd (1):
clk: qcom: Add support for NSS/GMAC clocks and resets

 .../devicetree/bindings/net/ipq806x-dwmac.txt      |  35 ++
 drivers/clk/qcom/gcc-ipq806x.c                     | 594 ++++++++++++++++++++-
 drivers/net/ethernet/stmicro/stmmac/Kconfig        |  14 +
 drivers/net/ethernet/stmicro/stmmac/Makefile       |   1 +
 .../net/ethernet/stmicro/stmmac/dwmac-ipq806x.c    | 365 +++++++++++++
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |  30 +-
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |  18 +-
 include/dt-bindings/clock/qcom,gcc-ipq806x.h       |   2 +
 include/dt-bindings/reset/qcom,gcc-ipq806x.h       |  43 ++
 include/linux/stmmac.h                             |   1 +
 10 files changed, 1089 insertions(+), 14 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/ipq806x-dwmac.txt
 create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c

2.1.4