diff mbox series

[v12,1/3] PCI: Add macro PCIE_PME_TO_L2_TIMEOUT_US

Message ID 20230821184815.2167131-2-Frank.Li@nxp.com (mailing list archive)
State Accepted
Headers show
Series dwc general suspend/resume functionality | expand

Commit Message

Frank Li Aug. 21, 2023, 6:48 p.m. UTC 
Introduce the PCIE_PME_TO_L2_TIMEOUT_US macro to facilitate checking the
L2 ready timeout in the PCI subsystem.

Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/pci/pci.h | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index a4c397434057..da8156663c82 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;