xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

PCI: shpchp: Add shpchp_is_native()

Browse Source 
In the same way we do for pciehp, add shpchp_is_native(), which returns
true if the bridge should be handled by the native SHPC driver.  Then
convert the driver to use this function.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Mika Westerberg
2018-05-31 11:42:11 -05:00
committed by Bjorn Helgaas
parent bed4e9cfab
commit 90cc0c3cc7
6 changed files with 35 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/pci/pci-acpi.c
View File

@@ -394,6 +394,35 @@ bool pciehp_is_native(struct pci_dev *bridge)
return host->native_pcie_hotplug;
}
/**
* shpchp_is_native - Check whether a hotplug port is handled by the OS
* @bridge: Hotplug port to check
*
* Returns true if the given @bridge is handled by the native SHPC hotplug
* driver.
*/
bool shpchp_is_native(struct pci_dev *bridge)
{
const struct pci_host_bridge *host;
if (!IS_ENABLED(CONFIG_HOTPLUG_PCI_SHPC))
return false;
/*
* It is assumed that AMD GOLAM chips support SHPC but they do not
* have SHPC capability.
*/
if (bridge->vendor == PCI_VENDOR_ID_AMD &&
bridge->device == PCI_DEVICE_ID_AMD_GOLAM_7450)
return true;
if (!pci_find_capability(bridge, PCI_CAP_ID_SHPC))
return false;
host = pci_find_host_bridge(bridge->bus);
return host->native_shpc_hotplug;
}
/**
* pci_acpi_wake_bus - Root bus wakeup notification fork function.
* @context: Device wakeup context.