On Fri, Nov 20, 2020 at 12:11:25PM +0100, Flavio Suligoi wrote: > 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@xxxxxxx> Reviewed-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
