PCI: shpchp: Add shpchp_is_native()

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>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 52b8434d4d6e..65113b6eed14 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -395,6 +395,35 @@ bool pciehp_is_native(struct pci_dev *bridge)
 }
 
 /**
+ * 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.
  */