davinci_mdio: probe of davinci_mdio.0 failed with error -22

trichet christophe said:

[    1.262481] sysfs: cannot create duplicate filename '/class/mdio_bus/0'    

It seems that the kernel is trying to register the MDIO driver twice.

Hi,

Please put a print inside the mdiobus_register() function in <linux_dir>/drivers/net/phy/mdio_bus.c to see how many times is it called. It should be called only once.

Error -22 is /* Invalid argument */ but this is caused because of sysfs_add_one() function returning error -EEXIST (/* File exists */).

Best regards,
Miroslav

Hello

thank you for your reply.

I started from evm board that has TI PHY. But my custom board has 2 Marvel PHY. So that i validated in kernel configuration marvell support (CONFIG_NET_VENDOR_MARVELL=y)
Yes your are right i have to registrations (i added in mdiobus_register(struct mii_bus *bus) the
        printk(KERN_ERR "mdiobus_register UCR %s %s\n", bus->name, bus->id); )

Can you help me to know what to do to go from TI PHY on board am335xevm to a custom board with marvell PHY ? thanks in advance

Please find below the kernel trace.

best regards

   Data Size:    3164648 Bytes = 3 MiB                                          

   Load Address: 80008000                                                       

   Entry Point:  80008000                                                       

   Verifying Checksum ... OK                                                    

   XIP Kernel Image ... OK                                                      

OK                                                                              

Starting kernel ...                                                             

Uncompressing Linux... done, booting the kernel.                                

[    0.000000] Linux version 3.2.0 (pengwyn@pengwyn-desktop) (gcc version 4.5.3 

20110311 (prerelease) (GCC) ) #70 Wed May 14 11:42:29 CEST 2014                 

[    0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7d  

[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instructio

n cache                                                                         

[    0.000000] Machine: am335xevm                                               

[    0.000000] Memory policy: ECC disabled, Data cache writeback                

[    0.000000] AM335X ES2.0 (neon )                                             

[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pag

es: 130048                                                                      

[    0.000000] Kernel command line: console=ttyO0,115200n8 root=/dev/nfs nfsroot

=192.168.213.44:/home/pengwyn/ti-sdk-am335x-evm-05.06.00.00/targetNFS,proto=tcp,

port=2049 rw ip=dhcp                                                            

[    0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)              

[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)  

[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)   

[    0.000000] Memory: 512MB = 512MB total                                      

[    0.000000] Memory: 513140k/513140k available, 11148k reserved, 0K highmem   

[    0.000000] Virtual kernel memory layout:                                    

[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)                

[    0.000000]     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)                

[    0.000000]     vmalloc : 0xe0800000 - 0xff000000   ( 488 MB)                

[    0.000000]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)                

[    0.000000]     modules : 0xbf000000 - 0xc0000000   (  16 MB)                

[    0.000000]       .text : 0xc0008000 - 0xc05a0000   (5728 kB)                

[    0.000000]       .init : 0xc05a0000 - 0xc05de000   ( 248 kB)                

[    0.000000]       .data : 0xc05de000 - 0xc0649450   ( 430 kB)                

[    0.000000]        .bss : 0xc0649474 - 0xc0674924   ( 174 kB)                

[    0.000000] NR_IRQS:396                                                      

[    0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrup

ts                                                                              

[    0.000000] Total of 128 interrupts on 1 active controller                   

[    0.000000] OMAP clockevent source: GPTIMER2 at 24000000 Hz                  

[    0.000000] OMAP clocksource: GPTIMER1 at 32768 Hz                           

[    0.000000] sched_clock: 32 bits at 32kHz, resolution 30517ns, wraps every 13

1071999ms                                                                       

[    0.000000] Console: colour dummy device 80x30                               

[    0.000183] Calibrating delay loop... 548.86 BogoMIPS (lpj=2744320)          

[    0.047149] pid_max: default: 32768 minimum: 301                             

[    0.047302] Security Framework initialized                                   

[    0.047424] Mount-cache hash table entries: 512                              

[    0.047851] CPU: Testing write buffer coherency: ok                          

[    0.068817] omap_hwmod: gfx: failed to hardreset                             

[    0.084991] omap_hwmod: pruss: failed to hardreset                           

[    0.086303] print_constraints: dummy:                                        

[    0.086730] NET: Registered protocol family 16                               

[    0.089233] OMAP GPIO hardware version 0.1                                   

[    0.092132] am335x_ucr_init**                                                

[    0.092407] omap_mux_init: Add partition: #1: core, flags: 0                 

[    0.094512]  omap_i2c.1: alias fck already exists                            

[    0.095306]  d_can.1: alias fck already exists                               

[    0.095581] am33xx_d_can_init(1) for UCR                                     

[    0.095977]  omap2_mcspi.1: alias fck already exists                         

[    0.096221]  omap2_mcspi.2: alias fck already exists                         

[    0.097351]  edma.0: alias fck already exists                                

[    0.097381]  edma.0: alias fck already exists                                

[    0.097381]  edma.0: alias fck already exists                                

[    0.130981] bio: create slab <bio-0> at 0                                    

[    0.133789] SCSI subsystem initialized                                       

[    0.135742] usbcore: registered new interface driver usbfs                   

[    0.136138] usbcore: registered new interface driver hub                     

[    0.136352] usbcore: registered new device driver usb                        

[    0.136535] musb-ti81xx musb-ti81xx: musb0, board_mode=0x13, plat_mode=0x3   

[    0.136871] musb-ti81xx musb-ti81xx: musb1, board_mode=0x13, plat_mode=0x1   

[    0.138214] omap_i2c omap_i2c.1: bus 1 rev2.4.0 at 100 kHz                   

[    0.139190] pcf857x: probe of 1-0040 failed with error -121                  

[    0.139465] i2c i2c-1: Invalid 7-bit I2C address 0xa0                        

[    0.139495] i2c i2c-1: Can't create device at 0xa0                           

[    0.140655] Advanced Linux Sound Architecture Driver Version 1.0.24.         

[    0.141937] Switching to clocksource gp timer                                

[    0.161132] musb-hdrc: version 6.0, ?dma?, otg (peripheral+host)             

[    0.161315] musb-hdrc musb-hdrc.0: dma type: pio                             

[    0.161743] MUSB0 controller's USBSS revision = 4ea20800                     

[    0.161773] musb0: Enabled SW babble control                                 

[    0.162628] musb-hdrc musb-hdrc.0: USB OTG mode controller at e083c000 using 

PIO, IRQ 18                                                                     

[    0.162811] musb-hdrc musb-hdrc.1: dma type: pio                             

[    0.163177] MUSB1 controller's USBSS revision = 4ea20800                     

[    0.163177] musb1: Enabled SW babble control                                 

[    0.163391] musb-hdrc musb-hdrc.1: MUSB HDRC host driver                     

[    0.163482] musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus numbe

r 1                                                                             

[    0.163635] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002    

[    0.163665] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=

1                                                                               

[    0.163665] usb usb1: Product: MUSB HDRC host driver                         

[    0.163696] usb usb1: Manufacturer: Linux 3.2.0 musb-hcd                     

[    0.163696] usb usb1: SerialNumber: musb-hdrc.1                              

[    0.164703] hub 1-0:1.0: USB hub found                                       

[    0.164733] hub 1-0:1.0: 1 port detected                                     

[    0.165435] musb-hdrc musb-hdrc.1: USB Host mode controller at e083e800 using

 PIO, IRQ 19                                                                    

[    0.165893] NET: Registered protocol family 2                                

[    0.166107] IP route cache hash table entries: 4096 (order: 2, 16384 bytes)  

[    0.166473] TCP established hash table entries: 16384 (order: 5, 131072 bytes

)                                                                               

[    0.166839] TCP bind hash table entries: 16384 (order: 4, 65536 bytes)       

[    0.167053] TCP: Hash tables configured (established 16384 bind 16384)       

[    0.167083] TCP reno registered                                              

[    0.167083] UDP hash table entries: 256 (order: 0, 4096 bytes)               

[    0.167114] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)          

[    0.167327] NET: Registered protocol family 1                                

[    0.167633] RPC: Registered named UNIX socket transport module.              

[    0.167663] RPC: Registered udp transport module.                            

[    0.167663] RPC: Registered tcp transport module.                            

[    0.167663] RPC: Registered tcp NFSv4.1 backchannel transport module.        

[    0.167938] NetWinder Floating Point Emulator V0.97 (double precision)       

[    0.187164] VFS: Disk quotas dquot_6.5.2                                     

[    0.187255] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)       

[    0.187896] msgmni has been set to 1002                                      

[    0.191558] alg: No test for stdrng (krng)                                   

[    0.192382] io scheduler noop registered                                     

[    0.192413] io scheduler deadline registered                                 

[    0.192504] io scheduler cfq registered (default)                            

[    0.194366] omap_uart.0: ttyO0 at MMIO 0x44e09000 (irq = 72) is a OMAP UART0 

[    0.764495] console [ttyO0] enabled                                          

[    0.768737] omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1 

[    0.776397] omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2 

[    0.784057] omap_uart.3: ttyO3 at MMIO 0x481a6000 (irq = 44) is a OMAP UART3 

[    0.791625] omap_uart.4: ttyO4 at MMIO 0x481a8000 (irq = 45) is a OMAP UART4 

[    0.799285] omap_uart.5: ttyO5 at MMIO 0x481aa000 (irq = 46) is a OMAP UART5 

[    0.807495] omap4_rng omap4_rng: OMAP4 Random Number Generator ver. 2.00     

[    0.825683] brd: module loaded                                               

[    0.834930] loop: module loaded                                              

[    0.838317] i2c-core: driver [tsl2550] using legacy suspend method           

[    0.844604] i2c-core: driver [tsl2550] using legacy resume method            

[    0.850860] at24 1-0050: 32768 byte 24c256 EEPROM, writable, 64 bytes/write  

[    0.857910] MAC address Pengwyn                                              

[    0.861083] UCR Board                                                        

[    0.863403] Board name: UCR                                                  

[    0.866302] Board version: #1.0                                              

[    0.869476] The board is UCR.                                                

[    0.873291] _omap_mux_get_by_name: Could not find signal mcasp0_aclkr.gpio3_1

5                                                                               

[    0.880676]  omap_hsmmc.0: alias fck already exists                          

[    0.886749] omap-gpmc omap-gpmc: GPMC revision 6.0                           

[    0.891601] Registering NAND on CS0                                          

[    0.896514] The board UCR has no phy_register_fixup_for_uid.                 

[    0.902557] registered am33xx_sr device                                      

[    0.908538] mtdoops: mtd device (mtddev=name/number) must be supplied        

[    0.915679] omap2-nand driver initializing                                   

[    0.920166] NAND device: Manufacturer ID: 0x20, Chip ID: 0x76 (ST Micro NAND 

64MiB 3,3V 8-bit)                                                               

[    0.929138] Creating 8 MTD partitions on "omap2-nand.0":                     

[    0.934570] 0x000000000000-0x000000080000 : "SPL"                            

[    0.942718] 0x000000080000-0x000000100000 : "SPL.backup1"                    

[    0.951263] 0x000000100000-0x000000180000 : "SPL.backup2"                    

[    0.959808] 0x000000180000-0x000000200000 : "SPL.backup3"                    

[    0.968414] 0x000000200000-0x000000380000 : "U-Boot"                         

[    0.979827] 0x000000380000-0x000000400000 : "U-Boot Env"                     

[    0.988372] 0x000000400000-0x000001000000 : "Kernel"                         

[    1.032440] usb 1-1: new high-speed USB device number 2 using musb-hdrc      

[    1.040618] 0x000001000000-0x000004000000 : "File System"                    

[    1.202850] OneNAND driver initializing                                      

[    1.207580] _init marvell_init marvell.c                                     

[    1.214111] mdiobus_register UCR Fixed MDIO Bus 0                            

[    1.219329] Fixed MDIO Bus: probed                                           

[    1.222778] vcan: Virtual CAN interface driver                               

[    1.227294] CAN device driver interface                                      

[    1.231170] CAN bus driver for Bosch D_CAN controller 1.0                    

[    1.237548] d_can d_can.1: device registered (irq=55, irq_obj=56)            

[    1.244628] mdiobus_register UCR davinci_mdio.0 0                            

[    1.249450] ------------[ cut here ]------------                             

[    1.254180] WARNING: at fs/sysfs/dir.c:481 sysfs_add_one+0xa4/0xb4()         

[    1.260620] sysfs: cannot create duplicate filename '/class/mdio_bus/0'      

[    1.267333] Modules linked in:                                               

[    1.270416] Backtrace:                                                       

[    1.272949] [<c0017978>] (dump_backtrace+0x0/0x110) from [<c0423700>] (dump_s

tack+0x18/0x1c)                                                                 

[    1.281494]  r6:c0519c14 r5:000001e1 r4:d802dd28 r3:c05ff948                 

[    1.287261] [<c04236e8>] (dump_stack+0x0/0x1c) from [<c003e49c>] (warn_slowpa

th_common+0x5c/0x6c)                                                            

[    1.296295] [<c003e440>] (warn_slowpath_common+0x0/0x6c) from [<c003e550>] (w

arn_slowpath_fmt+0x38/0x40)                                                     

[    1.305877]  r8:00000001 r7:d8022000 r6:d8232950 r5:d8022000 r4:ffffffef     

[    1.312530] r3:00000009                                                      

[    1.315216] [<c003e518>] (warn_slowpath_fmt+0x0/0x40) from [<c01004cc>] (sysf

s_add_one+0xa4/0xb4)                                                            

[    1.324188]  r3:d8022000 r2:c0519c48                                         

[    1.327819] [<c0100428>] (sysfs_add_one+0x0/0xb4) from [<c0100d68>] (sysfs_do

_create_link+0x108/0x1f4)                                                       

[    1.337249]  r7:d80b0a40 r6:d8232a90 r5:d802dd80 r4:d8232950                 

[    1.343048] [<c0100c60>] (sysfs_do_create_link+0x0/0x1f4) from [<c0100e68>] (

sysfs_create_link+0x14/0x18)                                                    

[    1.352752] [<c0100e54>] (sysfs_create_link+0x0/0x18) from [<c0223320>] (devi

ce_add+0x284/0x588)                                                             

[    1.361663] [<c022309c>] (device_add+0x0/0x588) from [<c0223640>] (device_reg

ister+0x1c/0x20)                                                                

[    1.370300] [<c0223624>] (device_register+0x0/0x20) from [<c0279d80>] (mdiobu

s_register+0xb0/0x18c)                                                          

[    1.379486]  r4:d822b400 r3:00000000                                         

[    1.383117] [<c0279cd0>] (mdiobus_register+0x0/0x18c) from [<c041e610>] (davi

nci_mdio_probe+0x228/0x2e0)                                                     

[    1.392730]  r8:00000000 r7:d81e4b00 r6:d81e6e08 r5:d8230700 r4:d81e6e00     

[    1.399353] r3:00000000                                                      

[    1.402038] [<c041e3e8>] (davinci_mdio_probe+0x0/0x2e0) from [<c022727c>] (pl

atform_drv_probe+0x20/0x24)                                                     

[    1.411651]  r7:c0626e3c r6:c0643738 r5:c06699c0 r4:d81e6e08                 

[    1.417419] [<c022725c>] (platform_drv_probe+0x0/0x24) from [<c0225c94>] (dri

ver_probe_device+0xc0/0x2dc)                                                    

[    1.427124] [<c0225bd4>] (driver_probe_device+0x0/0x2dc) from [<c0225f44>] (_

_driver_attach+0x94/0x98)                                                       

[    1.436553]  r8:00000000 r7:00000000 r6:d81e6e3c r5:c0626e3c r4:d81e6e08     

[    1.443389] [<c0225eb0>] (__driver_attach+0x0/0x98) from [<c0224bf8>] (bus_fo

r_each_dev+0x58/0x84)                                                           

[    1.452453]  r6:00000000 r5:c0225eb0 r4:c0626e3c r3:c0225eb0                 

[    1.458221] [<c0224ba0>] (bus_for_each_dev+0x0/0x84) from [<c022588c>] (drive

r_attach+0x24/0x28)                                                             

[    1.467132]  r6:d822eb40 r5:c061f400 r4:c0626e3c                             

[    1.471832] [<c0225868>] (driver_attach+0x0/0x28) from [<c02254f8>] (bus_add_

driver+0x19c/0x26c)                                                             

[    1.480743] [<c022535c>] (bus_add_driver+0x0/0x26c) from [<c02264e8>] (driver

_register+0x80/0x138)                                                           

[    1.489807] [<c0226468>] (driver_register+0x0/0x138) from [<c022774c>] (platf

orm_driver_register+0x5c/0x60)                                                  

[    1.499694]  r8:00000000 r7:00000000 r6:d802c000 r5:c05dd3f8 r4:c0649480     

[    1.506317] r3:00000000                                                      

[    1.509002] [<c02276f0>] (platform_driver_register+0x0/0x60) from [<c05c1ec0>

] (davinci_mdio_init+0x18/0x1c)                                                 

[    1.518981] [<c05c1ea8>] (davinci_mdio_init+0x0/0x1c) from [<c000876c>] (do_o

ne_initcall+0x3c/0x180)                                                         

[    1.528259] [<c0008730>] (do_one_initcall+0x0/0x180) from [<c05a0884>] (kerne

l_init+0x9c/0x130)                                                              

[    1.537078] [<c05a07e8>] (kernel_init+0x0/0x130) from [<c004151c>] (do_exit+0

x0/0x67c)                                                                       

[    1.545104]  r5:c05a07e8 r4:00000000                                         

[    1.548797] ---[ end trace 848036c861c61084 ]---                             

[    1.553771] mii_bus 0 failed to register                                     

[    1.557769] davinci_mdio: probe of davinci_mdio.0 failed with error -22      

[    1.564910] usbcore: registered new interface driver zd1201                  

[    1.570800] usbcore: registered new interface driver cdc_ether               

[    1.576904] usbcore: registered new interface driver cdc_eem                 

[    1.582855] usbcore: registered new interface driver dm9601                  

[    1.588500] cdc_ncm: 04-Aug-2011                                             

[    1.591949] usbcore: registered new interface driver cdc_ncm                 

[    1.597717] Initializing USB Mass Storage driver...                          

[    1.602935] usbcore: registered new interface driver usb-storage             

[    1.609008] USB Mass Storage support registered.                             

[    1.614135] usbcore: registered new interface driver usbserial               

[    1.620208] USB Serial support registered for generic                        

[    1.642822] usb 1-1: New USB device found, idVendor=0424, idProduct=2513     

[    1.649597] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0

[    1.657836] hub 1-1:1.0: USB hub found                                       

[    1.661743] hub 1-1:1.0: 3 ports detected                                    

[    1.666961] usbcore: registered new interface driver usbserial_generic       

[    1.673614] usbserial: USB Serial Driver core                                

[    1.678222] USB Serial support registered for FTDI USB Serial Device         

[    1.685058] usbcore: registered new interface driver ftdi_sio                

[    1.690887] ftdi_sio: v1.6.0:USB FTDI Serial Converters Driver               

[    1.697387] mousedev: PS/2 mouse device common for all mice                  

[    1.704193] omap_rtc am33xx-rtc: rtc core: registered am33xx-rtc as rtc0     

[    1.711242] i2c /dev entries driver                                          

[    1.715301] Linux video capture interface: v2.00                             

[    1.720367] usbcore: registered new interface driver uvcvideo                

[    1.726226] USB Video Class driver (1.1.1)                                   

[    1.732635] OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec             

[    1.739013] _regulator_get: deviceless supply vdd_mpu not found, using dummy 

regulator                                                                       

[    1.747558] cpuidle: using governor ladder                                   

[    1.752288] cpuidle: using governor menu                                     

[    1.758728] omap4_aes_mod_init: loading AM33X AES driver                     

[    1.764251] omap4-aes omap4-aes: AM33X AES hw accel rev: 3.02                

[    1.770965] omap4_aes_probe: probe() done                                    

[    1.775543] omap4_sham_mod_init: loading AM33X SHA/MD5 driver                

[    1.781524] omap4-sham omap4-sham: AM33X SHA/MD5 hw accel rev: 4.03          

[    1.797149] omap4_sham_probe: probe() done                                   

[    1.807617] usbcore: registered new interface driver usbhid                  

[    1.813293] usbhid: USB HID core driver                                      

[    1.817901] usbcore: registered new interface driver snd-usb-audio           

[    1.826080] ALSA device list:                                                

[    1.829071]   No soundcards found.                                           

[    1.832519] oprofile: hardware counters not available                        

[    1.837677] oprofile: using timer interrupt.                                 

[    1.842010] nf_conntrack version 0.5.0 (8017 buckets, 32068 max)             

[    1.848724] ip_tables: (C) 2000-2006 Netfilter Core Team                     

[    1.854278] TCP cubic registered                                             

[    1.857543] NET: Registered protocol family 17                               

[    1.862060] can: controller area network core (rev 20090105 abi 8)           

[    1.868438] NET: Registered protocol family 29                               

[    1.872955] can: raw protocol (rev 20090105)                                 

[    1.877288] can: broadcast manager protocol (rev 20090105 t)                 

[    1.883087] Registering the dns_resolver key type                            

[    1.887939] VFP support v0.3: implementor 41 architecture 3 part 30 variant c

 rev 3                                                                          

[    1.895721] ThumbEE CPU extension supported.                                 

[    1.900085] mux: Failed to setup hwmod io irq -22                            

[    1.905548] Power Management for AM33XX family                               

[    1.910278] Trying to load am335x-pm-firmware.bin (60 secs timeout)          

[    1.916748] Copied the M3 firmware to UMEM                                   

[    1.921081] smartreflex smartreflex: am33xx_sr_probe: Smartreflex requires ES

 1.0                                                                            

[    1.928710] smartreflex: probe of smartreflex failed with error -22          

[    1.935638] sr_init: platform driver register failed                         

[    1.944580] clock: disabling unused clocks to save power                     

[    1.963409] mmc0: host does not support reading read-only switch. assuming wr

ite-enable.                                                                     

[    1.973449] mmc0: new high speed SD card at address 0260                     

[    1.979675] mmcblk0: mmc0:0260 SD    977 MiB                                 

[    1.986053] Detected MACID=1c:ba:8c:b7:27:3e                                 

[    1.991912] cpsw: Detected MACID = 1c:ba:8c:b7:27:40                         

[    1.997589]  mmcblk0: p1 p2 < >                                              

[    2.002563] omap_rtc am33xx-rtc: setting system clock to 2000-01-01 00:00:00 

UTC (946684800)                                                                 

[    2.015991] PHY 0:16 not found                                               

The Sitara MDIO has only one bus, which you can use to control two PHYs. You should not register a second mdio bus. Instead, the mdiobus_register() function should bring up all the PHYs connected to the bus.

Here is an excerpt from the AM335x StarterKit's boot log:

[    1.289062] davinci_mdio davinci_mdio.0: davinci mdio revision 1.6
[    1.295501] davinci_mdio davinci_mdio.0: detected phy mask fffffffc
[    1.303802] davinci_mdio.0: probed
[    1.307342] davinci_mdio davinci_mdio.0: phy[0]: device 0:00, driver unknown
[    1.314727] davinci_mdio davinci_mdio.0: phy[1]: device 0:01, driver unknown

The StarterKit initialization code is a good reference if you want to connect two PHYs to this MDIO bus.

This is done inside the <linux_dir>/drivers/net/ethernet/ti/davinci_mdio.c: davinci_mdio_probe():

    /* register the mii bus */
    ret = mdiobus_register(data->bus);
    if (ret)
        goto bail_out;

    /* scan and dump the bus */
    for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
        phy = data->bus->phy_map[addr];
        if (phy) {
            dev_info(dev, "phy[%d]: device %s, driver %s\n",
                 phy->addr, dev_name(&phy->dev),
                 phy->drv ? phy->drv->name : "unknown");
        }
    }

Best regards,
Miroslav

Hello

thank you for your reply

1As my PHY are both marvell, i have to include the drivers/net/ethernet/marvell repertory ?

2 How can i do that (there is no option in make menuconfig) ?

3 or should i start from drivers/net/ethernet/ti  (by validating CONFIG_TI_DAVINCI_MDIO=y in menu config) and adapt it to marvell ?

best regards

Hello,

I validated TI support in kernel and got :

[    1.024871] davinci_mdio davinci_mdio.0: davinci mdio revision 1.6           
[    1.031158] davinci_mdio davinci_mdio.0: detected phy mask effeffff          
[    1.039093] davinci_mdio.0: probed                                           
[    1.042541] davinci_mdio davinci_mdio.0: phy[16]: device 0:10, driver Marvell
 88E3018                                                                        
[    1.050506] davinci_mdio davinci_mdio.0: phy[28]: device 0:1c, driver Marvell
 88E1118                                                                        

indicating my 2 PHYs are seen on MDIO bus. But linux then recognize only eth interface 0:10 as described in interdaces.c :

    {
        .slave_reg_ofs  = 0x200,
        .sliver_reg_ofs = 0xd80,
        .phy_id        = "0:1C",
        .dual_emac_reserved_vlan = CPSW_PORT_VLAN_SLAVE_0,
    },
    {
        .slave_reg_ofs  = 0x300,
        .sliver_reg_ofs = 0xdc0,
        .phy_id        = "0:10",
        .dual_emac_reserved_vlan = CPSW_PORT_VLAN_SLAVE_1,
    },

[    1.534332] PHY 0:1C not found                                               
[    1.537445] UCR m88e3018_config_init                                         
[    1.543334] net eth0: CPSW phy found : id is : 0x1410e20                     
[    4.539489] PHY: 0:10 - Link is Up - 100/Full                                
[    4.568695] Sending DHCP requests ., OK      

Have you any idea why 1C is not seen (but PHY found on bus MDIO) ?

thanks

regards

Hello ,