mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2025-01-01 10:42:11 +00:00
The linux-next integration testing tree
a7137cbf6b
Currently, the Rockchip PCIe endpoint controller driver does not handle the PERST# signal, which prevents detecting when link training should actually be started or if the host resets the device. This however can be supported using the controller reset_gpios property set as an input GPIO for endpoint mode. Modify the Rockchip PCI endpoint controller driver to get the reset_gpio and its associated interrupt which is serviced using a threaded IRQ with the function rockchip_pcie_ep_perst_irq_thread() as handler. This handler function notifies a link down event corresponding to the RC side asserting the PERST# signal using pci_epc_linkdown() when the gpio is high. Once the gpio value goes down, corresponding to the RC de-asserting the PERST# signal, link training is started. The polarity of the gpio interrupt trigger is changed from high to low after the RC asserted PERST#, and conversely changed from low to high after the RC de-asserts PERST#. Also, given that the host mode controller and the endpoint mode controller use two different property names for the same PERST# signal (ep_gpios property and reset_gpios property respectively), for clarity, rename the ep_gpio field of struct rockchip_pcie to perst_gpio. Link: https://lore.kernel.org/r/20241017015849.190271-14-dlemoal@kernel.org Signed-off-by: Damien Le Moal <dlemoal@kernel.org> [kwilczynski: make log messages consistent, add missing include] Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.