diff options
author | Flavio Suligoi <f.suligoi@asem.it> | 2020-11-20 12:11:25 +0100 |
---|---|---|
committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-11-23 17:59:49 +0100 |
commit | 390029c27ea74099a7f56f7ae502d11953fa1187 (patch) | |
tree | c14da597d50ba537ddd95a83e22677c3451855c8 /lib | |
parent | a8b6cfdf978602dbbb0b9b19e74f25af7a8ca389 (diff) | |
download | linux-390029c27ea74099a7f56f7ae502d11953fa1187.tar.gz linux-390029c27ea74099a7f56f7ae502d11953fa1187.tar.bz2 linux-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 <f.suligoi@asem.it>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions