sravan/system76-coreboot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

pci_device: Add a helper function for determining if PCI device is wake source

Browse Source 
This change adds a helper function `pci_dev_is_wake_source()` that
checks PME_STATUS and PME_ENABLE bits in PM control and status
register to determine if the given device is the source of wake.

BUG=b:169802515
BRANCH=zork

Change-Id: I06e9530b568543ab2f05a4f38dc5c3a527ff391e
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46030
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Rob Barnes <robbarnes@google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
This commit is contained in:
Furquan Shaikh
2020-10-03 16:23:55 -07:00
parent 35a77428b2
commit 494f319be7
2 changed files with 26 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/include/device/pci.h
View File

@@ -80,6 +80,14 @@ void pci_bus_reset(struct bus *bus);
struct device *pci_probe_dev(struct device *dev, struct bus *bus,
unsigned int devfn);
/*
* Determine if the given PCI device is the source of wake from sleep by checking PME_STATUS and
* PME_ENABLE bits in PM control and status register.
*
* Returns true if PCI device is wake source, false otherwise.
*/
bool pci_dev_is_wake_source(const struct device *dev);
void do_pci_scan_bridge(struct device *dev,
void (*do_scan_bus)(struct bus *bus,
unsigned int min_devfn, unsigned int max_devfn));