From: Frank Li <Frank.Li@nxp.com>
To: frank.li@nxp.com
Cc: bhelgaas@google.com, devicetree@vger.kernel.org,
gustavo.pimentel@synopsys.com, helgaas@kernel.org,
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 v12 1/3] PCI: Add macro PCIE_PME_TO_L2_TIMEOUT_US
Date: Mon, 21 Aug 2023 14:48:13 -0400 [thread overview]
Message-ID: <20230821184815.2167131-2-Frank.Li@nxp.com> (raw)
In-Reply-To: <20230821184815.2167131-1-Frank.Li@nxp.com>
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 --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;
--
2.34.1
next prev parent reply other threads:[~2023-08-21 18:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-21 18:48 [PATCH v12 0/3] dwc general suspend/resume functionality Frank Li
2023-08-21 18:48 ` Frank Li [this message]
2023-08-21 18:48 ` [PATCH v12 2/3] PCI: dwc: Implement general suspend/resume functionality for L2/L3 transitions Frank Li
2024-02-01 16:50 ` Bjorn Helgaas
2024-02-01 17:08 ` Frank Li
2024-02-01 17:53 ` Bjorn Helgaas
2023-08-21 18:48 ` [PATCH v12 3/3] PCI: layerscape: Add power management support for ls1028a Frank Li
2023-08-22 9:02 ` Lorenzo Pieralisi
2023-08-22 14:30 ` Frank Li
2023-08-23 7:53 ` Manivannan Sadhasivam
2023-08-23 14:15 ` Frank Li
2023-08-24 9:50 ` [PATCH v12 0/3] dwc general suspend/resume functionality Lorenzo Pieralisi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230821184815.2167131-2-Frank.Li@nxp.com \
--to=frank.li@nxp.com \
--cc=bhelgaas@google.com \
--cc=devicetree@vger.kernel.org \
--cc=gustavo.pimentel@synopsys.com \
--cc=helgaas@kernel.org \
--cc=imx@lists.linux.dev \
--cc=kw@linux.com \
--cc=leoyang.li@nxp.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-imx@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=lorenzo.pieralisi@arm.com \
--cc=lpieralisi@kernel.org \
--cc=mani@kernel.org \
--cc=manivannan.sadhasivam@linaro.org \
--cc=minghuan.lian@nxp.com \
--cc=mingkai.hu@nxp.com \
--cc=robh+dt@kernel.org \
--cc=roy.zang@nxp.com \
--cc=shawnguo@kernel.org \
--cc=zhiqiang.hou@nxp.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox