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ChromiumOS uses ACPI device with HID "GOOG0003" for power delivery related events. The existing cros-usbpd-charger driver relies on these events without ever actually receiving them on ACPI platforms. This is because in the ChromeOS kernel trees, the GOOG0003 device is owned by an ACPI driver that offers firmware updates to USB-C chargers. Introduce a new platform driver under cros-ec, the ChromeOS embedded controller, that handles these PD events and dispatches them appropriately over a notifier chain to all drivers that use them. On platforms that don't have the ACPI device defined, the driver gets instantiated for ECs which support the EC_FEATURE_USB_PD feature bit, and the notification events will get delivered using the MKBP event handling mechanism. Co-Developed-by: Prashant Malani <pmalani@chromium.org> Reviewed-by: Gwendal Grignou <gwendal@chromium.org> Reviewed-by: Benson Leung <bleung@chromium.org> Signed-off-by: Jon Flatley <jflat@chromium.org> Signed-off-by: Prashant Malani <pmalani@chromium.org> Acked-By: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Benson Leung <bleung@chromium.org> |
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| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
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| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
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| 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 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.