[PATCH v9 1/3] PCI: Add macro PCIE_PME_TO_L2_TIMEOUT_US

[Frank Li <Frank.Li@xxxxxxx>]

Introduces the PCIE_PME_TO_L2_TIMEOUT_US macro to facilitate checking the
PME (Power Management Event) timeout in the PCI subsystem.

Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
 drivers/pci/pci.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index a4c3974340576..da8156663c825 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -13,6 +13,12 @@
 
 #define PCIE_LINK_RETRAIN_TIMEOUT_MS	1000
 
+/*
+ * PCIe r6.0, sec 5.3.3.2.1 <PME Synchronization>
+ * Recommends 1ms to 10ms timeout to check L2 ready.
+ */
+#define PCIE_PME_TO_L2_TIMEOUT_US	10000
+
 extern const unsigned char pcie_link_speed[];
 extern bool pci_early_dump;
 
-- 
2.34.1