[PATCH v8 1/3] PCI: Add macro PCIE_PME_TO_L2_TIMEOUT_US
From: Frank Li <Frank.Li@nxp.com>
Date: 2023-08-03 15:04:44
Also in:
imx, linux-arm-kernel, linux-pci, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
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@nxp.com> --- 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