[PATCH V3 0/5] Add support to defer core initialization

From: Vidya Sagar
Date: Mon Feb 17 2020 - 07:10:47 EST

EPC/DesignWare core endpoint subsystems assume that the core registers are
available always for SW to initialize. But, that may not be the case always.
For example, Tegra194 hardware has the core running on a clock that is derived
from reference clock that is coming into the endpoint system from host.
Hence core is made available asynchronously based on when host system is going
for enumeration of devices. To accommodate this kind of hardwares, support is
required to defer the core initialization until the respective platform driver
informs the EPC/DWC endpoint sub-systems that the core is indeed available for
initiaization. This patch series is attempting to add precisely that.
This series is based on Kishon's patch that adds notification mechanism
support from EPC to EPF @ http://patchwork.ozlabs.org/patch/1236793/ from the
series @ http://patchwork.ozlabs.org/project/linux-pci/list/?series=158088

* Rebased this series on top of kishon's new patch series as mentioned above
* Added Acked-by: Kishon Vijay Abraham I <kishon@xxxxxx>

* Addressed review comments from Kishon

Vidya Sagar (5):
PCI: endpoint: Add core init notifying feature
PCI: dwc: Refactor core initialization code for EP mode
PCI: endpoint: Add notification for core init completion
PCI: dwc: Add API to notify core initialization completion
PCI: pci-epf-test: Add support to defer core initialization

.../pci/controller/dwc/pcie-designware-ep.c | 79 +++++++-----
drivers/pci/controller/dwc/pcie-designware.h | 11 ++
drivers/pci/endpoint/functions/pci-epf-test.c | 118 ++++++++++++------
drivers/pci/endpoint/pci-epc-core.c | 19 ++-
include/linux/pci-epc.h | 2 +
include/linux/pci-epf.h | 5 +
6 files changed, 164 insertions(+), 70 deletions(-)