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| author | Flavio Suligoi <[email protected]> | 2020-11-20 11:11:25 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <[email protected]> | 2020-11-23 16:59:49 +0000 |
| commit | 390029c27ea74099a7f56f7ae502d11953fa1187 (patch) | |
| tree | c14da597d50ba537ddd95a83e22677c3451855c8 /drivers/pci/controller/vmd.c | |
| parent | Documentation: ACPI: _DSD: enable hyperlink in final references (diff) | |
| download | kernel-390029c27ea74099a7f56f7ae502d11953fa1187.tar.gz kernel-390029c27ea74099a7f56f7ae502d11953fa1187.zip | |
Documentation: ACPI: enumeration: add PCI hierarchy representation
For "fixed" PCI devices, such as chips directly soldered
on the main board (ethernet, Wi-Fi, serial ports, etc.),
it is possible to find an ACPI enumeration.
This allows to add useful properties to these devices.
Just for an example: the property "gpio-line-names" can be
added to the pins of a GPIO expander on the PCI bus.
In order to find the ACPI name of a PCI device, it's necessary
to disassemble the BIOS ACPI tables (in particular the DSDT)
and also to analyze the PCI bus topology of the board.
This patch, with a practical example, show how to do this.
Signed-off-by: Flavio Suligoi <[email protected]>
Reviewed-by: Mika Westerberg <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Diffstat (limited to 'drivers/pci/controller/vmd.c')
0 files changed, 0 insertions, 0 deletions