From: Frank Li <Frank.Li@nxp.com>
To: helgaas@kernel.org
Cc: Frank.li@nxp.com, bhelgaas@google.com,
devicetree@vger.kernel.org, gustavo.pimentel@synopsys.com,
imx@lists.linux.dev, kw@linux.com, leoyang.li@nxp.com,
linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
lorenzo.pieralisi@arm.com, lpieralisi@kernel.org,
mani@kernel.org, manivannan.sadhasivam@linaro.org,
minghuan.lian@nxp.com, mingkai.hu@nxp.com, robh+dt@kernel.org,
roy.zang@nxp.com, shawnguo@kernel.org, zhiqiang.hou@nxp.com
Subject: [PATCH v9 1/3] PCI: Add macro PCIE_PME_TO_L2_TIMEOUT_US
Date: Fri, 4 Aug 2023 14:06:35 -0400 [thread overview]
Message-ID: <20230804180637.462573-2-Frank.Li@nxp.com> (raw)
In-Reply-To: <20230804180637.462573-1-Frank.Li@nxp.com>
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
next prev parent reply other threads:[~2023-08-04 18:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-04 18:06 [PATCH v9 0/3] dwc general suspend/resume functionality Frank Li
2023-08-04 18:06 ` Frank Li [this message]
2023-08-07 13:19 ` [PATCH v9 1/3] PCI: Add macro PCIE_PME_TO_L2_TIMEOUT_US Manivannan Sadhasivam
2023-08-04 18:06 ` [PATCH v9 2/3] PCI: dwc: Implement general suspend/resume functionality for L2/L3 transitions Frank Li
2023-08-07 13:35 ` Manivannan Sadhasivam
2023-08-04 18:06 ` [PATCH v9 3/3] PCI: layerscape: Add power management support for ls1028a Frank Li
2023-08-07 13:41 ` Manivannan Sadhasivam
2023-08-07 16:20 ` [PATCH v9 0/3] dwc general suspend/resume functionality Frank Li
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