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f3d3eab667
For ACPI devices which do not have a _PSC method, the ACPI subsys cannot query their initial state at boot, so these devices are assumed to have been put in D0 by the BIOS, but for touchscreens that is not always true. This commit adds a call to acpi_device_fix_up_power to explicitly put devices without a _PSC method into D0 state (for devices with a _PSC method it is a nop). Note we only need to do this on probe, after a resume the ACPI subsys knows the device is in D3 and will properly put it in D0. This fixes the SIS0817 i2c-hid touchscreen on a Peaq C1010 2-in-1 device failing to probe with a "hid_descr_cmd failed" error. Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.