imx6dl eth0 interface is not up... lan8740 is used as phy

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imx6dl eth0 interface is not up... lan8740 is used as phy

Contributor II

I'm using Imx6dl processor for an embedded application. In which i am  using  lan8740 PHY chip for 'eth0' interface.  I am using a yocto build linux and the kernel version is 4.9.11.   Even though the kernel is able to detect the PHY, it is not up and working. 

The DTB used is 

&fec {
   pinctrl-names = "default";
   pinctrl-0 = <&pinctrl_enet_4>;
   phy-mode = "rmii";
   phy-reset-gpios = <&gpio5 5 0>;
   phy-handle = <&ethphy>;
   status = "okay";
   mdio {
      #address-cells = <1>;
      #size-cells = <0>;
      ethphy: ethernet-phy@0 {
         compatible = "smsc,lan8740";
         device_type = "ethernet-phy";
         reg = <0>;

The following is the kernel log:

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Booting Linux on physical CPU 0x0
Linux version 4.9.11-1.0.0+gc27010d (oe-user@oe-host) (gcc version 7.3.0 (GCC) ) #27 SMP PREEMPT Tue May 8 10:38:40 UTC 2018
CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
OF: fdt:Machine model: Freescale i.MX6 DualLite SABRE Smart Device Board
OF: reserved mem: failed to allocate memory for node 'linux,cma'
Memory policy: Data cache writealloc
percpu: Embedded 14 pages/cpu @8fdc0000 s25996 r8192 d23156 u57344
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024
Kernel command line: console=ttymxc4,115200 root=/dev/nfs nfsroot= ip= V3
PID hash table entries: 1024 (order: 0, 4096 bytes)
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 248580K/262144K available (6144K kernel code, 330K rwdata, 2168K rodata, 1024K init, 437K bss, 13564K reserved, 0K cma-reserved, 0K highmem)
Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
vmalloc : 0x90800000 - 0xff800000 (1776 MB)
lowmem : 0x80000000 - 0x90000000 ( 256 MB)
pkmap : 0x7fe00000 - 0x80000000 ( 2 MB)
modules : 0x7f000000 - 0x7fe00000 ( 14 MB)
.text : 0x80008000 - 0x80700000 (7136 kB)
.init : 0x80a00000 - 0x80b00000 (1024 kB)
.data : 0x80b00000 - 0x80b52b40 ( 331 kB)
.bss : 0x80b54000 - 0x80bc17b4 ( 438 kB)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
Preemptible hierarchical RCU implementation.
Build-time adjustment of leaf fanout to 32.
RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
RCU: Adjusting geometry for rcu_fanout_leaf=32, nr_cpu_ids=2
NR_IRQS:16 nr_irqs:16 16
L2C: DT/platform modifies aux control register: 0x32050000 -> 0x32450000
L2C-310 erratum 769419 enabled
L2C-310 enabling early BRESP for Cortex-A9
L2C-310 full line of zeros enabled for Cortex-A9
L2C-310 ID prefetch enabled, offset 16 lines
L2C-310 dynamic clock gating enabled, standby mode enabled
L2C-310 cache controller enabled, 16 ways, 512 kB
L2C-310: CACHE_ID 0x410000c8, AUX_CTRL 0x76450001
Switching to timer-based delay loop, resolution 333ns
sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 715827882841ns
clocksource: mxc_timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 637086815595 ns
Console: colour dummy device 80x30
Calibrating delay loop (skipped), value calculated using timer frequency.. 6.00 BogoMIPS (lpj=30000)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
CPU: Testing write buffer coherency: ok
CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0x10100000 - 0x10100058
CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
Brought up 2 CPUs
SMP: Total of 2 processors activated (12.00 BogoMIPS).
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
pinctrl core: initialized pinctrl subsystem
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
cpuidle: using governor menu
CPU identified as i.MX6DL, silicon rev 1.1
hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers.
hw-breakpoint: maximum watchpoint size is 4 bytes.
imx6dl-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver
imx-gpc 20dc000.gpc: Registered imx-gpc
mxs-dma 110000.dma-apbh: initialized
SCSI subsystem initialized
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <>
PTP clock support registered
imx-ipuv3 2400000.ipu: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)
mxc_mipi_csi2 21dc000.mipi_csi: i.MX MIPI CSI2 driver probed
mxc_mipi_csi2 21dc000.mipi_csi: i.MX MIPI CSI2 dphy version is 0x3130302a
MIPI CSI2 driver module loaded
imx rpmsg driver is registered.
clocksource: Switched to clocksource mxc_timer1
VFS: Disk quotas dquot_6.6.0
VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
NET: Registered protocol family 2
TCP established hash table entries: 2048 (order: 1, 8192 bytes)
TCP bind hash table entries: 2048 (order: 2, 16384 bytes)
TCP: Hash tables configured (established 2048 bind 2048)
UDP hash table entries: 256 (order: 1, 8192 bytes)
UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7 counters available
Bus freq driver module loaded
futex hash table entries: 512 (order: 3, 32768 bytes)
workingset: timestamp_bits=30 max_order=16 bucket_order=0
squashfs: version 4.0 (2009/01/31) Phillip Lougher
NFS: Registering the id_resolver key type
Key type id_resolver registered
Key type id_legacy registered
jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
fuse init (API version 7.26)
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
OF: PCI: host bridge /soc/pcie@0x01000000 ranges:
OF: PCI: No bus range found for /soc/pcie@0x01000000, using [bus 00-ff]
OF: PCI: IO 0x01f80000..0x01f8ffff -> 0x00000000
OF: PCI: MEM 0x01000000..0x01efffff -> 0x01000000
imx6q-pcie 1ffc000.pcie: Link up, Gen1
imx6q-pcie 1ffc000.pcie: PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [bus 00-ff]
pci_bus 0000:00: root bus resource [io 0x0000-0xffff]
pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff]
PCI: bus0: Fast back to back transfers disabled
PCI: bus1: Fast back to back transfers disabled
pci 0000:00:00.0: BAR 0: assigned [mem 0x01000000-0x010fffff]
pci 0000:00:00.0: BAR 8: assigned [mem 0x01100000-0x011fffff]
pci 0000:00:00.0: BAR 6: assigned [mem 0x01200000-0x0120ffff pref]
pci 0000:00:00.0: BAR 7: assigned [io 0x1000-0x1fff]
pci 0000:01:00.0: BAR 0: assigned [mem 0x01100000-0x0111ffff]
pci 0000:01:00.0: BAR 3: assigned [mem 0x01120000-0x01123fff]
pci 0000:01:00.0: BAR 2: assigned [io 0x1000-0x101f]
pci 0000:00:00.0: PCI bridge to [bus 01]
pci 0000:00:00.0: bridge window [io 0x1000-0x1fff]
pci 0000:00:00.0: bridge window [mem 0x01100000-0x011fffff]
pcieport 0000:00:00.0: Signaling PME through PCIe PME interrupt
pci 0000:01:00.0: Signaling PME through PCIe PME interrupt
ldb 2000000.aips-bus:ldb@020e0008: crtc not specified or invalid
ldb: probe of 2000000.aips-bus:ldb@020e0008 failed with error -22
imx-sdma 20ec000.sdma: no iram assigned, using external mem
imx-sdma 20ec000.sdma: loaded firmware 3.3
imx-uart 2020000.serial: Can't Init GPIO for uart1
imx-uart 2020000.serial: Device structure assigned
2020000.serial: ttymxc0 at MMIO 0x2020000 (irq = 26, base_baud = 5000000) is a IMX
imx-uart 21f4000.serial: Device structure assigned
21f4000.serial: ttymxc4 at MMIO 0x21f4000 (irq = 66, base_baud = 5000000) is a IMX
console [ttymxc4] enabled
imx sema4 driver is registered.
brd: module loaded
loop: module loaded
libphy: Fixed MDIO Bus: probed
2188000.ethernet supply phy not found, using dummy regulator
pps pps0: new PPS source ptp0
libphy: fec_enet_mii_bus: probed
mdio_bus 2188000.ethernet:00: mdio_device_register
fec 2188000.ethernet eth0: registered PHC device 0
e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
igb: Intel(R) Gigabit Ethernet Network Driver - version 5.4.0-k
igb: Copyright (c) 2007-2014 Intel Corporation.
igb 0000:01:00.0: enabling device (0140 -> 0142)
pps pps1: new PPS source ptp1
igb 0000:01:00.0: added PHC on eth1
igb 0000:01:00.0: Intel(R) Gigabit Ethernet Network Connection
igb 0000:01:00.0: eth1: (PCIe:2.5Gb/s:Width x1) 00:23:0f:00:0f:17
igb 0000:01:00.0: eth1: PBA No: FFFFFF-0FF
igb 0000:01:00.0: Using MSI interrupts. 1 rx queue(s), 1 tx queue(s)
snvs_rtc 20cc000.snvs:snvs-rtc-lp: rtc core: registered 20cc000.snvs:snvs-r as rtc0
i2c /dev entries driver
imx2-wdt 20c0000.wdog: timeout 60 sec (nowayout=0)
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci-pltfm: SDHCI platform and OF driver helper
sdhci-esdhc-imx 2194000.usdhc: Got CD GPIO
sdhci-esdhc-imx 2194000.usdhc: Got WP GPIO
mmc1: SDHCI controller on 2194000.usdhc [2194000.usdhc] using ADMA
sdhci-esdhc-imx 2198000.usdhc: Got CD GPIO
sdhci-esdhc-imx 2198000.usdhc: Got WP GPIO
mmc2: SDHCI controller on 2198000.usdhc [2198000.usdhc] using ADMA
mmc3: SDHCI controller on 219c000.usdhc [219c000.usdhc] using ADMA
mxc_vpu 2040000.vpu_fsl: VPU initialized
mxc_vdoa 21e4000.vdoa: i.MX Video Data Order Adapter(VDOA) driver probed
NET: Registered protocol family 26
NET: Registered protocol family 10
sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
NET: Registered protocol family 17
8021q: 802.1Q VLAN Support v1.8
Key type dns_resolver registered
cpu cpu0: Registered imx6q-cpufreq
imx_epdc_fb 20f4000.epdc: can't get/select pinctrl
mmc3: new DDR MMC card at address 0001
snvs_rtc 20cc000.snvs:snvs-rtc-lp: setting system clock to 1970-01-01 00:00:00 UTC (0)
mmcblk3: mmc3:0001 MMC02G 1.79 GiB
IP-Config: Failed to open eth0
IP-Config: Device `eth0' not found
mmcblk3boot0: mmc3:0001 MMC02G partition 1 1.00 MiB
mmcblk3boot1: mmc3:0001 MMC02G partition 2 1.00 MiB
mmcblk3rpmb: mmc3:0001 MMC02G partition 3 128 KiB
mmcblk3: p1 p2 p3 p4 < p5 p6 p7 >
vddpu: bypassed regulator has no supply!
vddpu: bypassed regulator has no supply!

Can any one help?

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2 Replies

NXP Employee
NXP Employee

Hi Vivek

one can check clocks (they are set in uboot) as suggested on

RMII interface on i.MX6 Solo 

and check if it is working in uboot.

Best regards
Note: If this post answers your question, please click the Correct Answer button. Thank you!

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Contributor II


In uboot the eth0 interface is working fine.  I able to do a tftpboot uboot.  But when the kernel starts eth0 interface does not come up.  



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