imx8 支持PCIE Endpoint
插上模块，输入以下命令：$ dmesg| grep pci$ lspci -v
MYZR-IMX8M-EK300输出以下信息：
root@myzr:~# dmesg| grep pci
[ 3.291149] ehci-pci: EHCI PCI platform driver
[ 3.314253] ohci-pci: OHCI PCI platform driver
[ 5.563865] imx6q-pcie 33800000.pcie: 33800000.pcie supply epdev_on not found, using dummy regulator
[ 5.572501] OF: PCI: host bridge /pcie@0x33800000 ranges:
[ 5.576752] OF: PCI: No bus range found for /pcie@0x33800000, using
[ 5.593555] imx6q-pcie 33800000.pcie: pcie phy pll is locked.
[ 5.842329] imx6q-pcie 33800000.pcie: phy link never came up
[ 5.846713] imx6q-pcie 33800000.pcie: failed to initialize host
[ 5.851339] imx6q-pcie 33800000.pcie: unable to add pcie port.
[ 5.856799] imx6q-pcie: probe of 33800000.pcie failed with error -110
[ 5.864915] imx6q-pcie 33c00000.pcie: 33c00000.pcie supply epdev_on not found, using dummy regulator
[ 5.873059] OF: PCI: host bridge /pcie@0x33c00000 ranges:
[ 5.877227] OF: PCI: No bus range found for /pcie@0x33c00000, using
[ 5.894067] imx6q-pcie 33c00000.pcie: pcie phy pll is locked.
[ 5.971961] imx6q-pcie 33c00000.pcie: Speed change timeout
[ 5.976153] imx6q-pcie 33c00000.pcie: Roll back to GEN1 link!
[ 5.980606] imx6q-pcie 33c00000.pcie: Link up, Gen1
[ 5.987200] imx6q-pcie 33c00000.pcie: PCI host bridge to bus 0000:00
[ 5.992283] pci_bus 0000:00: root bus resource
[ 5.996545] pci_bus 0000:00: root bus resource (bus address )
[ 6.004231] pci_bus 0000:00: root bus resource
[ 6.009932] pci 0000:00:00.0: type 01 class 0x060400
[ 6.009971] pci 0000:00:00.0: reg 0x10:
[ 6.009982] pci 0000:00:00.0: reg 0x38:
[ 6.010040] pci 0000:00:00.0: supports D1
[ 6.010048] pci 0000:00:00.0: PME# supported from D0 D1 D3hot D3cold
[ 6.010645] pci 0000:01:00.0: type 00 class 0x028000
[ 6.010784] pci 0000:01:00.0: reg 0x10:
[ 6.011224] pci 0000:01:00.0: PME# supported from D0 D3hot D3cold
[ 6.022488] pci 0000:00:00.0: BAR 0: assigned
[ 6.028597] pci 0000:00:00.0: BAR 14: assigned
[ 6.034248] pci 0000:00:00.0: BAR 6: assigned
[ 6.040247] pci 0000:01:00.0: BAR 0: assigned
[ 6.046325] pci 0000:00:00.0: PCI bridge to
[ 6.050338] pci 0000:00:00.0: bridge window
[ 6.056721] pcieport 0000:00:00.0: Signaling PME with IRQ 271
[ 6.061499] pcieport 0000:00:00.0: AER enabled with IRQ 271
root@myzr:~# lspci -v
00:00.0 PCI bridge: Synopsys, Inc. Device abcd (rev 01) (prog-if 00 )
Flags: bus master, fast devsel, latency 0, IRQ 271
Memory at 20000000 (64-bit, non-prefetchable)
Bus: primary=00, secondary=01, subordinate=ff, sec-latency=0
Memory behind bridge: 20100000-201fffff
Expansion ROM at 20200000
Capabilities: Power Management version 3
Capabilities: MSI: Enable+ Count=1/1 Maskable+ 64bit+
Capabilities: Express Root Port (Slot-), MSI 00
Capabilities: Advanced Error Reporting
Capabilities: L1 PM Substates
Kernel driver in use: pcieport
01:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN Network Connection (rev 61)
Subsystem: Intel Corporation PRO/Wireless 4965 AG or AGN Network Connection
Flags: fast devsel
Memory at 20100000 (64-bit, non-prefetchable)
Capabilities: Power Management version 3
Capabilities: MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: Express Endpoint, MSI 00
Capabilities: Advanced Error Reporting
Capabilities: Device Serial Number 00-1f-3b-ff-ff-1c-b8-fd
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