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

[viveksundarthir]

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>;
   fsl,magic-packet;
   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=10.151.50.110:/nfs/ ip=10.151.30.12:10.151.50.110:10.151.1.1:255.255.0.0:wand:eth0:off 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 <giometti@linux.it>
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?

[igorpadykov]

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

[viveksundarthir]

Hi 

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.  

Thanks,

Vivek