AnsweredAssumed Answered


Question asked by Christophe Cholet on Sep 20, 2013
Latest reply on Jan 16, 2015 by PraveenM

Hi all,


I've connected a lan8720 with imx6q, following doc recommandations. Component seems to correctly respond but there's no way to ping .

I've read in posts that imx6 kernel doesn't support rmii no longer, and that a patch is necessary. Is it the case ? I join schematics and config.


Sans titre.png












MX6Q_PAD_EIM_D17__GPIO_3_17,                    /* Reset RMII */

MX6Q_PAD_EIM_D16__GPIO_3_16,                    /* Int RMII */



I use an external 50 MHz ref clock. Init in the kernel is like below:


- reset MX6Q_PAD_EIM_D17__GPIO_3_1

- Bit 21 to 0: mxc_iomux_set_gpr_register(1, 21, 1, 0);

- imx6_init_fec(fec_data);


static struct fec_platform_data fec_data __initdata =


    .init = mx6q_sabresd_fec_phy_init,





In uboot:


   * get enet tx reference clk from internal clock from anatop

   * GPR1[21] = 1



  reg =  readl(IOMUXC_BASE_ADDR + 0x4);

  // reg |= (0x1 << 21);

  reg |= (0x0 << 21);                   /* External clock chosen */

  writel(reg, IOMUXC_BASE_ADDR + 0x4);


And the modif  in fec_init()

#if defined(CONFIG_MX6Q) || defined(CONFIG_MX6DL)

  /* RGMII */

//    fecp->rcr &= ~(0x100);

//    fecp->rcr |= 0x44;

  /* RMII */

    fecp->rcr &= ~(0x40);

    fecp->rcr |= 0x104;




And the log:

CPU: Freescale i.MX6 family TO1.2 at 792 MHz

Temperature:   40 C, calibration data 0x5b350a7d

mx6q pll1: 792MHz

mx6q pll2: 528MHz

mx6q pll3: 480MHz

mx6q pll8: 50MHz

ipg clock     : 66000000Hz

ipg per clock : 66000000Hz

uart clock    : 80000000Hz

cspi clock    : 60000000Hz

ahb clock     : 132000000Hz

axi clock   : 264000000Hz

emi_slow clock: 132000000Hz

ddr clock     : 528000000Hz

usdhc1 clock  : 198000000Hz

usdhc2 clock  : 198000000Hz

usdhc3 clock  : 198000000Hz

usdhc4 clock  : 198000000Hz

nfc clock     : 24000000Hz

Board: i.MX6Q-SABRESD: unknown-board Board: 0x63012 [POR ]

Boot Device: SD

I2C:   ready

DRAM:   1 GB


CLKCTL_CSCDR3    108410x


In:    serial

Out:   serial

Err:   serial

Found PFUZE100! deviceid=10,revid=11

Net:   got MAC address from IIM: 00:00:00:00:00:00


Hit any key to stop autoboot:  0

mmc0 is current device


MMC read: dev # 0, block # 2048, count 8192 ... 8192 blocks read: OK

## Booting kernel from Legacy Image at 10800000 ...

   Image Name:   Linux-3.0.35-2310-gc27cb38

   Image Type:   ARM Linux Kernel Image (uncompressed)

   Data Size:    3430328 Bytes =  3.3 MB

   Load Address: 10008000

   Entry Point:  10008000

   Verifying Checksum ... OK

   Loading Kernel Image ... OK



Starting kernel ...


Uncompressing Linux... done, booting the kernel.

Linux version 3.0.35-2310-gc27cb38 (lucid@ubuntu) (gcc version 4.6.2 20110630 (prerelease) (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) ) #156 SMP PREEMPT Fri Sep 20 08:40:07 CEST 2013

CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d

CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache

Machine: Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board

Ignoring unrecognised tag 0x54410008

Memory policy: ECC disabled, Data cache writealloc

CPU identified as i.MX6Q, silicon rev 1.2

PERCPU: Embedded 7 pages/cpu @8c008000 s5440 r8192 d15040 u32768

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 227328

Kernel command line: console=ttymxc0,115200 video=mxcfb0:dev=lcd,720P60R1,if=RGB24 video=mxcfb1:dev=ldb,LDB-XGA,if=RGB666 video=mxcfb2:dev=lcd,720P60R1,if=RGB32 video=mxcfb3:off root=/dev/mmcblk0p1 rw rootwait

PID hash table entries: 4096 (order: 2, 16384 bytes)

Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)

Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)

Memory: 640MB 256MB = 896MB total

Memory: 901296k/901296k available, 147280k reserved, 0K highmem

Virtual kernel memory layout:

    vector  : 0xffff0000 - 0xffff1000   (   4 kB)

    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

    DMA     : 0xf4600000 - 0xffe00000   ( 184 MB)

    vmalloc : 0xc0800000 - 0xf2000000   ( 792 MB)

    lowmem  : 0x80000000 - 0xc0000000   (1024 MB)

    pkmap   : 0x7fe00000 - 0x80000000   (   2 MB)

    modules : 0x7f000000 - 0x7fe00000   (  14 MB)

      .init : 0x80008000 - 0x80036000   ( 184 kB)

      .text : 0x80036000 - 0x8065081c   (6251 kB)

      .data : 0x80652000 - 0x806ac300   ( 361 kB)

       .bss : 0x806ac324 - 0x806f6d74   ( 299 kB)

SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=2, Nodes=1

Preemptible hierarchical RCU implementation.


MXC GPIO hardware

sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms


MXC_Early serial console at MMIO 0x2020000 (options '115200')

bootconsole [ttymxc0] enabled

Console: colour dummy device 80x30

Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available

CPU1: Booted secondary processor

Brought up 2 CPUs

SMP: Total of 2 processors activated (3162.11 BogoMIPS).

print_constraints: dummy:

NET: Registered protocol family 16

print_constraints: vddpu: 725 <--> 1300 mV at 700 mV fast normal

print_constraints: vddcore: 725 <--> 1300 mV at 1150 mV fast normal

print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal

print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal

print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal

print_constraints: vdd3p0: 2625 <--> 3400 mV at 3000 mV fast normal

hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.

hw-breakpoint: 1 breakpoint(s) reserved for watchpoint single-step.

hw-breakpoint: maximum watchpoint size is 4 bytes.

L310 cache controller enabled

l2x0: 16 ways, CACHE_ID 0x410000c7, AUX_CTRL 0x02070000, Cache size: 1048576 B

bio: create slab <bio-0> at 0

mxs-dma mxs-dma-apbh: initialized

print_constraints: vmmc: 3300 mV

SCSI subsystem initialized

spi_imx imx6q-ecspi.0: probed

spi_imx imx6q-ecspi.1: probed

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

Freescale USB OTG Driver loaded, $Revision: 1.55 $

i2c i2c-1: Failed to register i2c client pfuze100 at 0x08 (-16)

i2c i2c-1: Can't create device at 0x08

i2c i2c-2: Invalid 7-bit I2C address 0x00

i2c i2c-2: Can't create device at 0x00

imx-ipuv3 imx-ipuv3.0: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)

imx-ipuv3 imx-ipuv3.1: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)

mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 driver probed

mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 dphy version is 0x3130302a

MIPI CSI2 driver module loaded

Advanced Linux Sound Architecture Driver Version 1.0.24.

i2c-core: driver [max17135] using legacy suspend method

i2c-core: driver [max17135] using legacy resume method

Switching to clocksource mxc_timer1

NET: Registered protocol family 2

IP route cache hash table entries: 32768 (order: 5, 131072 bytes)

TCP established hash table entries: 131072 (order: 8, 1048576 bytes)

TCP bind hash table entries: 65536 (order: 7, 786432 bytes)

TCP: Hash tables configured (established 131072 bind 65536)

TCP reno registered

UDP hash table entries: 512 (order: 2, 16384 bytes)

UDP-Lite hash table entries: 512 (order: 2, 16384 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.

PMU: registered new PMU device of type 0

Static Power Management for Freescale i.MX6

wait mode is enabled for i.MX6

cpaddr = c0880000 suspend_iram_base=c08fc000

PM driver module loaded

IMX usb wakeup probe

add wake up source irq 75

IMX usb wakeup probe

cpu regulator init ldo=0

i.MXC CPU frequency driver

JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.

msgmni has been set to 1760

alg: No test for stdrng (krng)

io scheduler noop registered

io scheduler deadline registered

io scheduler cfq registered (default)

mxc_mipi_dsi mxc_mipi_dsi: i.MX MIPI DSI driver probed

MIPI DSI driver module loaded

mxc_sdc_fb mxc_sdc_fb.0: register mxc display driver lcd

Register driver LCD MODE IPU0 DI0 : 720P60R1

Console: switching to colour frame buffer device 90x80

mxc_sdc_fb mxc_sdc_fb.1: register mxc display driver ldb

_regulator_get: get() with no identifier

mxc_sdc_fb mxc_sdc_fb.2: register mxc display driver lcd

Register driver LCD MODE IPU0 DI0 : 720P60R1

mxc_sdc_fb mxc_sdc_fb.2: ipu0-di0 already in use

mxc_sdc_fb: probe of mxc_sdc_fb.2 failed with error -16

mxc_sdc_fb mxc_sdc_fb.3: Can't get fb option for mxcfb3!

imx-sdma imx-sdma: loaded firmware 1.1

imx-sdma imx-sdma: initialized

Serial: IMX driver

imx-uart.0: ttymxc0 at MMIO 0x2020000 (irq = 58) is a IMX

console [ttymxc0] enabled, bootconsole disabled

console [ttymxc0] enabled, bootconsole disabled

loop: module loaded

GPMI NAND driver registered. (IMX)

FEC Ethernet Driver

fec_enet_mii_bus: probed

ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller

fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1

fsl-ehci fsl-ehci.0: irq 75, io base 0x02184000

fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 1 port detected

add wake up source irq 72

fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller

fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2

fsl-ehci fsl-ehci.1: irq 72, io base 0x02184200

fsl-ehci fsl-ehci.1: USB 2.0 started, EHCI 1.00

hub 2-0:1.0: USB hub found

hub 2-0:1.0: 1 port detected

Initializing USB Mass Storage driver...

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

ARC USBOTG Device Controller driver (1 August 2005)

egalax_ts 1-0004: egalax_ts: failed to read firmware version

egalax_ts: probe of 1-0004 failed with error -5

egalax_ts 2-0004: egalax_ts: failed to read firmware version

egalax_ts: probe of 2-0004 failed with error -5

snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc0

i2c /dev entries driver

Linux video capture interface: v2.00

mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video16

mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video17

mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video18

imx2-wdt imx2-wdt.0: IMX2+ Watchdog Timer enabled. timeout=60s (nowayout=1)

sdhci: Secure Digital Host Controller Interface driver

sdhci: Copyright(c) Pierre Ossman

sdhci sdhci-esdhc-imx.0: no write-protect pin available!

sdhci sdhci-esdhc-imx.0: no card-detect pin available!

mmc0: no vmmc regulator found

mmc0: SDHCI controller on platform [sdhci-esdhc-imx.0] using DMA

mmc1: SDHCI controller on platform [sdhci-esdhc-imx.1] using DMA

mxc_vdoa mxc_vdoa: i.MX Video Data Order Adapter(VDOA) driver probed

VPU initialized

mxc_asrc registered

Thermal calibration data is 0x5b350a7d

Anatop Thermal registered as thermal_zone0

anatop_thermal_probe: default cooling device is cpufreq!

usbcore: registered new interface driver usbhid

usbhid: USB HID core driver

usbcore: registered new interface driver snd-usb-audio

Cirrus Logic CS42888 ALSA SoC Codec Driver

i2c-core: driver [cs42888] using legacy suspend method

i2c-core: driver [cs42888] using legacy resume method

imx_3stack asoc driver

ALSA device list:

  No soundcards found.

NET: Registered protocol family 26

TCP cubic registered

NET: Registered protocol family 17

lib80211: common routines for IEEE802.11 drivers

VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4

Bus freq driver module loaded

Bus freq driver Enabled


DVFS driver module loaded

snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 00:00:00 UTC (0)

Waiting for root device /dev/mmcblk0p1...

mmc0: host does not support reading read-only switch. assuming write-enable.

mmc0: new high speed SDHC card at address e624

mmcblk0: mmc0:e624 SU04G 3.69 GiB

mmcblk0: p1

EXT3-fs: barriers not enabled

EXT3-fs (mmcblk0p1): warning: maximal mount count reached, running e2fsck is recommended

kjournald starting.  Commit interval 5 seconds

EXT3-fs (mmcblk0p1): using internal journal

EXT3-fs (mmcblk0p1): recovery complete

EXT3-fs (mmcblk0p1): mounted filesystem with writeback data mode

VFS: Mounted root (ext3 filesystem) on device 179:1.

Freeing init memory: 184K

starting pid 1242, tty '': '/etc/rc.d/rcS'

Mounting /proc and /sys

Starting the hotplug events dispatcher udevd

udevd (1251): /proc/1251/oom_adj is deprecated, please use /proc/1251/oom_score_adj instead.

Synthesizing initial hotplug events

Mounting filesystems

mount: mounting usbfs on /proc/bus/usb failed: No such file or directory

Changing password for root

New password:

Bad password: too short

Retype password:

passwd: can't create '/etc/shadow+': File exists

passwd: can't update password file /etc/shadow


eth0: Freescale FEC PHY driver [Generic PHY] (mii_bus:phy_addr=1:00, irq=-1)

PHY: 1:00 - Link is Up - 100/Full


root@ /$ ifconfig -a

eth0      Link encap:Ethernet  HWaddr 1E:ED:19:27:1A:B3

          inet addr:  Bcast:  Mask:


          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)


lo        Link encap:Local Loopback

          LOOPBACK  MTU:16436  Metric:1

          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)



Thank for your help,