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authorMika Westerberg <mika.westerberg@linux.intel.com>2018-05-23 17:40:23 -0500
committerBjorn Helgaas <bhelgaas@google.com>2018-06-02 00:18:28 -0500
commit1df81a6d6e01ff3f351c614c5bc35b49847e1dc5 (patch)
treeda574d3095c83692bccf5ae669415ece176ea8a2 /drivers/acpi/pci_root.c
parent82280f7af729125b89d47cb420cac0a761664b32 (diff)
PCI: shpchp: Request SHPC control via _OSC when adding host bridge
The SHPC driver now must be builtin (it cannot be a module). If it is present, request SHPC control immediately when adding the ACPI host bridge. This is similar to how we handle native PCIe hotplug via pciehp. Suggested-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> [bhelgaas: split to separate patch] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/pci_root.c')
-rw-r--r--drivers/acpi/pci_root.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 032a578da5d4..d9b8407ce4e8 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -477,6 +477,9 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm)
if (IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE))
control |= OSC_PCI_EXPRESS_NATIVE_HP_CONTROL;
+ if (IS_ENABLED(CONFIG_HOTPLUG_PCI_SHPC))
+ control |= OSC_PCI_SHPC_NATIVE_HP_CONTROL;
+
if (pci_aer_available()) {
if (aer_acpi_firmware_first())
dev_info(&device->dev,
@@ -903,6 +906,8 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
host_bridge = to_pci_host_bridge(bus->bridge);
if (!(root->osc_control_set & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL))
host_bridge->native_pcie_hotplug = 0;
+ if (!(root->osc_control_set & OSC_PCI_SHPC_NATIVE_HP_CONTROL))
+ host_bridge->native_shpc_hotplug = 0;
if (!(root->osc_control_set & OSC_PCI_EXPRESS_AER_CONTROL))
host_bridge->native_aer = 0;
if (!(root->osc_control_set & OSC_PCI_EXPRESS_PME_CONTROL))