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The QCS404 platform contains a PCIe version 2.4.0 controller and a Qualcomm PCIe2 PHY. The driver already supports version 2.4.0, for the IPQ4019, but this support touches clocks and resets related to the PHY as well and there's no upstream driver for the PHY. On QCS404 we must initialize the PHY, so a separate PHY driver is implemented to take care of this and the controller driver is updated to not require the PHY related resources. This is done by relying on the fact that operations in both the clock and reset framework are NOPs when passed NULL, so we can isolate this change to only the qcom_pcie_get_resources_2_4_0() function. For QCS404 we also need to enable the AHB (iface) clock, in order to access the register space of the controller, but as this is not part of the IPQ4019 DT binding this is only added for new users of the 2.4.0 controller. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Niklas Cassel <niklas.cassel@linaro.org> Reviewed-by: Vinod Koul <vkoul@kernel.org> Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com> |
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| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
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| net | ||
| samples | ||
| scripts | ||
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| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
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| COPYING | ||
| CREDITS | ||
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| 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 Restructured Text 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.