[RFC PATCH v2 0/7] Reconstruct rockchip's PCIe and PCIe-PHY driver for per-lane PHY model

[Shawn Lin <shawn.lin@rock-chips.com>]

This patchset is trying to reconstruct PCIe and PCIe-PHY driver
for rockchip platform in order to support per-lane PHY mode. And
we could idle the inactive lane(s) finally.

We deprecate the legacy PHY mode but the code could still support
it in order not to break backware compatibility of DTB. And I organize
the patches carefully so that we don't introduce git-bisect issue.

Hi Brian & Jeffy,

I tested it by backporting all things into my kernel 4.4 tree, and it
works fine for both legacy PHY mode and per-lane PHY model. However I
couldn't run 4.12 for my rk3399-evb now, so it would be nice if you
can test it with your chrome devices running v4.12.

Hi Rob,

Does the changes for rockchip-pcie.txt in patch 6 & 7 look good to you
from the perspective of DT?


Changes in v2:
- deprecate legacy PHY model
- improve rockchip_pcie_phy_of_xlate
- fix wrong calculation of pwr_cnt and add new init_cnt
- add internal locking
- introduce per-lane data to simply the code
- convert that for all rk3399 platforms
- make listing all 4 lanes as mandatory

Shawn Lin (7):
  PCI: rockchip: split out rockchip_pcie_get_phys
  PCI: rockchip: introduce per-lanes PHYs support
  phy: rockcip-pcie: reconstruct driver to support per-lane PHYs
  PCI: rockchip: idle the inactive PHY(s)
  arm64: dts: rockchip: convert PCIe to use per-lane PHYs for rk3339
  dt-bindings: PCI: rockchip: convert to use per-lane PHY model
  Documentation: bindings: convert to use per-lane Rockchip PCIe PHY

 .../devicetree/bindings/pci/rockchip-pcie.txt      |  25 ++-
 .../devicetree/bindings/phy/rockchip-pcie-phy.txt  |   7 +-
 arch/arm64/boot/dts/rockchip/rk3399.dtsi           |   8 +-
 drivers/pci/host/pcie-rockchip.c                   | 168 ++++++++++++++++++---
 drivers/phy/rockchip/phy-rockchip-pcie.c           | 128 ++++++++++++++--
 5 files changed, 297 insertions(+), 39 deletions(-)

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1.9.1