Linux/AM3354: I2C EEPROM not working

please help me

Please post your DTS and boot log files.

DTS: &i2c0 { pinctrl-names = "default"; pinctrl-0 = ; status = "okay"; clock-frequency = ; tps: tps@2d { reg = ; }; eeprom: eeprom@50 { compatible = "at,24c256"; reg = ; }; }; Terminal output for the commands: root@am335x-evm:~/eeprom# i2cdump -f -y -r 0x00-0xff 0 0x50 c 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef 00: 56 69 6e 61 79 6b 75 6d 61 72 0a 7a 7a 0a 5c 30 Vinaykumar?zz?\0 10: 5c 30 5c 30 5c 30 5c 30 5c 30 0a ff ff ff ff ff \0\0\0\0\0?..... 20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ 30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ 40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ 50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ 60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ 70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ 80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ 90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ root@am335x-evm:~/eeprom# i2cset -f 0 0x50 0x50 0x65 w WARNING! This program can confuse your I2C bus, cause data loss and worse! DANGEROUS! Writing to a serial EEPROM on a memory DIMM may render your memory USELESS and make your system UNBOOTABLE! I will write to device file /dev/i2c-0, chip address 0x50, data address 0x50, data 0x65, mode word. Continue? [y/N] y root@am335x-evm:~/eeprom# i2cget -f 0 0x50 0x50 w WARNING! This program can confuse your I2C bus, cause data loss and worse! I will read from device file /dev/i2c-0, chip address 0x50, data address 0x50, using read word data. Continue? [Y/n] Y 0xffff root@am335x-evm:~/eeprom#

Boot log:
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 4.4.41-gf9f6f0db2d (root@user-bltsp01373) (gcc version 5.3.1 20160113 (Linaro GCC 5.3-2016.02) ) #112 P7
[ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine model: TI AM335x EVM
[ 0.000000] cma: Reserved 48 MiB at 0x9d000000
[ 0.000000] Memory policy: Data cache writeback
[ 0.000000] On node 0 totalpages: 131072
[ 0.000000] free_area_init_node: node 0, pgdat c090c064, node_mem_map dcb61000
[ 0.000000] Normal zone: 1152 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 131072 pages, LIFO batch:31
[ 0.000000] CPU: All CPU(s) started in SVC mode.
[ 0.000000] AM335X ES2.1 (sgx neon )
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 129920
[ 0.000000] Kernel command line: console=ttyO0,115200n8 quiet lpj=3590144 root=PARTUUID=cf53a43f-02 rw rootfstype=ext4 rootwait
[ 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: 460284K/524288K available (6403K kernel code, 313K rwdata, 2264K rodata, 256K init, 254K bss, 14852K reserved)
[ 0.000000] Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
vmalloc : 0xe0800000 - 0xff800000 ( 496 MB)
lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
.text : 0xc0008000 - 0xc087f04c (8669 kB)
.init : 0xc0880000 - 0xc08c0000 ( 256 kB)
.data : 0xc08c0000 - 0xc090e4f0 ( 314 kB)
.bss : 0xc090e4f0 - 0xc094dd98 ( 255 kB)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] Preemptible hierarchical RCU implementation.
[ 0.000000] Build-time adjustment of leaf fanout to 32.
[ 0.000000] NR_IRQS:16 nr_irqs:16 16
[ 0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
[ 0.000000] OMAP clockevent source: timer2 at 24000000 Hz
[ 0.000016] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
[ 0.000043] clocksource: timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
[ 0.000056] OMAP clocksource: timer1 at 24000000 Hz
[ 0.000297] clocksource_probe: no matching clocksources found
[ 0.000513] Console: colour dummy device 80x30
[ 0.000545] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'
[ 0.000553] This ensures that you still see kernel messages. Please
[ 0.000561] update your kernel commandline.
[ 0.000578] Calibrating delay loop (skipped) preset value.. 718.02 BogoMIPS (lpj=3590144)
[ 0.000599] pid_max: default: 32768 minimum: 301
[ 0.000751] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.000766] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.001618] Initializing cgroup subsys io
[ 0.001657] Initializing cgroup subsys memory
[ 0.001699] Initializing cgroup subsys devices
[ 0.001718] Initializing cgroup subsys freezer
[ 0.001736] Initializing cgroup subsys perf_event
[ 0.001751] Initializing cgroup subsys pids
[ 0.001784] CPU: Testing write buffer coherency: ok
[ 0.002255] Setting up static identity map for 0x80008200 - 0x80008260
[ 0.005002] devtmpfs: initialized
[ 0.022462] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
[ 0.027475] omap_hwmod: rtc: Missing dt reg0 for /ocp/rtc@44e3e000
[ 0.027497] ------------[ cut here ]------------
[ 0.027525] WARNING: CPU: 0 PID: 1 at arch/arm/mach-omap2/omap_hwmod.c:2523 _init.constprop.22+0x1fc/0x424()
[ 0.027535] omap_hwmod: rtc: doesn't have mpu register target base
[ 0.027544] Modules linked in:
[ 0.027566] CPU: 0 PID: 1 Comm: swapper Not tainted 4.4.41-gf9f6f0db2d #112
[ 0.027575] Hardware name: Generic AM33XX (Flattened Device Tree)
[ 0.027584] Backtrace:
[ 0.027622] [<c0013508>] (dump_backtrace) from [<c0013704>] (show_stack+0x18/0x1c)
[ 0.027632] r7:c088b7c4 r6:000009db r5:00000009 r4:00000000
[ 0.027664] [<c00136ec>] (show_stack) from [<c02a8aa8>] (dump_stack+0x24/0x28)
[ 0.027689] [<c02a8a84>] (dump_stack) from [<c0031d64>] (warn_slowpath_common+0x88/0xb4)
[ 0.027707] [<c0031cdc>] (warn_slowpath_common) from [<c0031dc8>] (warn_slowpath_fmt+0x38/0x40)
[ 0.027716] r8:000000a3 r7:dc0dcbc0 r6:00000000 r5:dcb56c98 r4:c07c49f0
[ 0.027747] [<c0031d94>] (warn_slowpath_fmt) from [<c088b7c4>] (_init.constprop.22+0x1fc/0x424)
[ 0.027756] r3:c08031bc r2:c07c49f0
[ 0.027768] r4:c08c9e60
[ 0.027785] [<c088b5c8>] (_init.constprop.22) from [<c088bb1c>] (__omap_hwmod_setup_all+0x48/0x98)
[ 0.027794] r10:00000000 r9:c0880600 r8:000000a3 r7:dc0dcbc0 r6:c08c4d20 r5:c08c6fd8
[ 0.027817] r4:c08c9e60
[ 0.027836] [<c088bad4>] (__omap_hwmod_setup_all) from [<c00096bc>] (do_one_initcall+0x98/0x1e4)
[ 0.027845] r5:c088bad4 r4:c08c4d20
[ 0.027869] [<c0009624>] (do_one_initcall) from [<c0880e80>] (kernel_init_freeable+0x138/0x1cc)
[ 0.027878] r10:00000002 r9:c0880600 r8:000000a3 r7:c08b381c r6:c08bf48c r5:c090e500
[ 0.027900] r4:c090e500
[ 0.027929] [<c0880d48>] (kernel_init_freeable) from [<c0642794>] (kernel_init+0x18/0xf4)
[ 0.027938] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c064277c
[ 0.027960] r4:c090e500
[ 0.027979] [<c064277c>] (kernel_init) from [<c000fab8>] (ret_from_fork+0x14/0x3c)
[ 0.027988] r5:c064277c r4:00000000
[ 0.028042] ---[ end trace 41372e4a47dea3d8 ]---
[ 0.042959] omap_hwmod: debugss: _wait_target_disable failed
[ 0.109187] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.113799] pinctrl core: initialized pinctrl subsystem
[ 0.115388] NET: Registered protocol family 16
[ 0.118144] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.148712] cpuidle: using governor ladder
[ 0.178701] cpuidle: using governor menu
[ 0.184185] gpiochip_add: registered GPIOs 0 to 31 on device: gpio
[ 0.184563] OMAP GPIO hardware version 0.1
[ 0.185524] gpiochip_add: registered GPIOs 32 to 63 on device: gpio
[ 0.186516] gpiochip_add: registered GPIOs 64 to 95 on device: gpio
[ 0.187490] gpiochip_add: registered GPIOs 96 to 127 on device: gpio
[ 0.195532] omap-gpmc 50000000.gpmc: could not find pctldev for node /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/nandflash_pins_se
[ 0.199298] hw-breakpoint: debug architecture 0x4 unsupported.
[ 0.239711] edma 49000000.edma: TI EDMA DMA engine driver
[ 0.240177] of_get_named_gpiod_flags: can't parse 'gpio' property of node '/fixedregulator@0[0]'
[ 0.240564] of_get_named_gpiod_flags: can't parse 'gpio' property of node '/fixedregulator@1[0]'
[ 0.244114] omap_i2c 44e0b000.i2c: could not find pctldev for node /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/pinmux_i2c0_pins, e
[ 0.244189] omap_i2c 4819c000.i2c: could not find pctldev for node /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/pinmux_i2c2_pins, e
[ 0.244369] media: Linux media interface: v0.10
[ 0.244459] Linux video capture interface: v2.00
[ 0.244524] pps_core: LinuxPPS API ver. 1 registered
[ 0.244535] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 0.244576] PTP clock support registered
[ 0.244665] EDAC MC: Ver: 3.0.0
[ 0.246125] omap-mailbox 480c8000.mailbox: omap mailbox rev 0x400
[ 0.246547] Advanced Linux Sound Architecture Driver Initialized.
[ 0.248074] clocksource: Switched to clocksource timer1
[ 0.262353] NET: Registered protocol family 2
[ 0.263306] TCP established hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.263379] TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.263439] TCP: Hash tables configured (established 4096 bind 4096)
[ 0.263527] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.263552] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.263746] NET: Registered protocol family 1
[ 0.264222] RPC: Registered named UNIX socket transport module.
[ 0.264239] RPC: Registered udp transport module.
[ 0.264249] RPC: Registered tcp transport module.
[ 0.264257] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.264287] PCI: CLS 0 bytes, default 64
[ 0.265420] hw perfevents: enabled with armv7_cortex_a8 PMU driver, 5 counters available
[ 0.267976] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.278958] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.279994] NFS: Registering the id_resolver key type
[ 0.280090] Key type id_resolver registered
[ 0.280100] Key type id_legacy registered
[ 0.280202] ntfs: driver 2.1.32 [Flags: R/O].
[ 0.284637] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 247)
[ 0.284674] io scheduler noop registered
[ 0.284694] io scheduler deadline registered
[ 0.284921] io scheduler cfq registered (default)
[ 0.286764] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568
[ 0.290802] pwm-backlight backlight: GPIO lookup for consumer enable
[ 0.290833] pwm-backlight backlight: using device tree for GPIO lookup
[ 0.290852] of_get_named_gpiod_flags: can't parse 'enable-gpios' property of node '/backlight[0]'
[ 0.290866] of_get_named_gpiod_flags: can't parse 'enable-gpio' property of node '/backlight[0]'
[ 0.290879] pwm-backlight backlight: using lookup tables for GPIO lookup
[ 0.290894] pwm-backlight backlight: lookup for GPIO enable failed
[ 0.290923] backlight supply power not found, using dummy regulator
[ 0.372751] Serial: 8250/16550 driver, 10 ports, IRQ sharing disabled
[ 0.377854] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 158, base_baud = 3000000) is a 8250
[ 0.407846] console [ttyS0] enabled
[ 0.409401] 48022000.serial: ttyS1 at MMIO 0x48022000 (irq = 159, base_baud = 3000000) is a 8250
[ 0.410780] [drm] Initialized drm 1.1.0 20060810
[ 0.411281] panel panel: found backlight
[ 0.411305] panel panel: GPIO lookup for consumer enable
[ 0.411319] panel panel: using device tree for GPIO lookup
[ 0.411336] of_get_named_gpiod_flags: can't parse 'enable-gpios' property of node '/panel[0]'
[ 0.411349] of_get_named_gpiod_flags: can't parse 'enable-gpio' property of node '/panel[0]'
[ 0.411362] panel panel: using lookup tables for GPIO lookup
[ 0.411376] panel panel: lookup for GPIO enable failed
[ 0.412986] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 0.413005] [drm] No driver support for vblank timestamp query.
[ 0.446100] Console: switching to colour frame buffer device 100x30
[ 0.454218] tilcdc 4830e000.lcdc: fb0: frame buffer device
[ 0.478290] [drm] Initialized tilcdc 1.0.0 20121205 on minor 0
[ 0.487030] loop: module loaded
[ 0.492068] libphy: Fixed MDIO Bus: probed
[ 0.558118] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6
[ 0.558148] davinci_mdio 4a101000.mdio: detected phy mask fffffffe
[ 0.559047] libphy: 4a101000.mdio: probed
[ 0.559075] davinci_mdio 4a101000.mdio: phy[0]: device 4a101000.mdio:00, driver SMSC LAN8710/LAN8720
[ 0.559922] cpsw 4a100000.ethernet: Detected MACID = 6c:ec:eb:f9:6f:96
[ 0.560099] cpsw 4a100000.ethernet: cpts: overflow check period 850
[ 0.562387] mousedev: PS/2 mouse device common for all mice
[ 0.563265] rtc-mcp795 spi1.0: SPI-RTC setup done....
[ 0.568987] rtc-mcp795 spi1.0: Read RTC called....!!!!
[ 0.574160] rtc-mcp795 spi1.0: Read from mcp795: 2017-11-28 18:36:18
[ 0.574468] rtc rtc0: rtc-mcp795: dev (254:0)
[ 0.574503] rtc-mcp795 spi1.0: rtc core: registered rtc-mcp795 as rtc0
[ 0.574583] i2c /dev entries driver
[ 0.576183] cpuidle: enable-method property 'ti,am3352' found operations
[ 0.577030] omap_hsmmc 48060000.mmc: GPIO lookup for consumer cd
[ 0.577050] omap_hsmmc 48060000.mmc: using device tree for GPIO lookup
[ 0.577068] of_get_named_gpiod_flags: can't parse 'cd-gpios' property of node '/ocp/mmc@48060000[0]'
[ 0.577082] of_get_named_gpiod_flags: can't parse 'cd-gpio' property of node '/ocp/mmc@48060000[0]'
[ 0.577095] omap_hsmmc 48060000.mmc: using lookup tables for GPIO lookup
[ 0.577110] omap_hsmmc 48060000.mmc: lookup for GPIO cd failed
[ 0.577126] omap_hsmmc 48060000.mmc: GPIO lookup for consumer wp
[ 0.577138] omap_hsmmc 48060000.mmc: using device tree for GPIO lookup
[ 0.577151] of_get_named_gpiod_flags: can't parse 'wp-gpios' property of node '/ocp/mmc@48060000[0]'
[ 0.577163] of_get_named_gpiod_flags: can't parse 'wp-gpio' property of node '/ocp/mmc@48060000[0]'
[ 0.577175] omap_hsmmc 48060000.mmc: using lookup tables for GPIO lookup
[ 0.577187] omap_hsmmc 48060000.mmc: lookup for GPIO wp failed
[ 0.598978] ledtrig-cpu: registered to indicate activity on CPUs
[ 0.603766] NET: Registered protocol family 10
[ 0.605410] sit: IPv6 over IPv4 tunneling driver
[ 0.606471] NET: Registered protocol family 17
[ 0.606857] Key type dns_resolver registered
[ 0.607191] omap_voltage_late_init: Voltage driver support not added
[ 0.617380] omap-gpmc 50000000.gpmc: GPMC revision 6.0
[ 0.617416] gpmc_mem_init: disabling cs 0 mapped at 0x0-0x1000000
[ 0.617432] gpiochip_find_base: found new base at 510
[ 0.617632] gpiochip_add: registered GPIOs 510 to 511 on device: omap-gpmc
[ 0.618983] omap2-nand 8000000.nand: GPIO lookup for consumer rb
[ 0.619009] omap2-nand 8000000.nand: using device tree for GPIO lookup
[ 0.619059] of_get_named_gpiod_flags: parsed 'rb-gpios' property of node '/ocp/gpmc@50000000/nand@0,0[0]' - status (0)
[ 0.619128] nand: device found, Manufacturer ID: 0x98, Chip ID: 0xda
[ 0.619138] nand: Toshiba NAND 256MiB 3,3V 8-bit
[ 0.619150] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 128
[ 0.619201] nand: using OMAP_ECC_BCH8_CODE_HW ECC scheme
[ 0.619337] 10 ofpart partitions found on MTD device 8000000.nand
[ 0.619348] Creating 10 MTD partitions on "8000000.nand":
[ 0.619369] 0x000000000000-0x000000080000 : "NAND.SPL"
[ 0.621276] 0x000000080000-0x000000100000 : "NAND.SPL.backup1"
[ 0.622919] 0x000000100000-0x000000180000 : "NAND.SPL.backup2"
[ 0.624481] 0x000000180000-0x000000200000 : "NAND.SPL.backup3"
[ 0.626060] 0x000000200000-0x000000280000 : "NAND.u-boot-spl-os"
[ 0.627858] 0x000000280000-0x000000380000 : "NAND.u-boot"
[ 0.629932] 0x000000380000-0x000000400000 : "NAND.u-boot-env"
[ 0.631590] 0x000000400000-0x000000480000 : "NAND.u-boot-env.backup1"
[ 0.633100] 0x000000480000-0x000000b80000 : "NAND.kernel"
[ 0.637233] 0x000000b80000-0x000040000000 : "NAND.file-system"
[ 0.637253] mtd: partition "NAND.file-system" extends beyond the end of device "8000000.nand" -- size truncated to 0xf480000
[ 0.758343] tps65910 0-002d: No interrupt support, no core IRQ
[ 0.758594] tps65910-gpio tps65910-gpio: ti,en-gpio-sleep not specified
[ 0.758617] gpiochip_find_base: found new base at 504
[ 0.758784] gpiochip_add: registered GPIOs 504 to 509 on device: tps65910
[ 0.784333] at24 0-0050: 32768 byte 24c256 EEPROM, writable, 1 bytes/write
[ 0.784395] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 400 kHz
[ 0.786019] omap_i2c 4819c000.i2c: bus 2 rev0.11 at 400 kHz
[ 0.786714] omap_hsmmc 48060000.mmc: GPIO lookup for consumer cd
[ 0.786738] omap_hsmmc 48060000.mmc: using device tree for GPIO lookup
[ 0.786759] of_get_named_gpiod_flags: can't parse 'cd-gpios' property of node '/ocp/mmc@48060000[0]'
[ 0.786774] of_get_named_gpiod_flags: can't parse 'cd-gpio' property of node '/ocp/mmc@48060000[0]'
[ 0.786788] omap_hsmmc 48060000.mmc: using lookup tables for GPIO lookup
[ 0.786803] omap_hsmmc 48060000.mmc: lookup for GPIO cd failed
[ 0.786821] omap_hsmmc 48060000.mmc: GPIO lookup for consumer wp
[ 0.786833] omap_hsmmc 48060000.mmc: using device tree for GPIO lookup
[ 0.786845] of_get_named_gpiod_flags: can't parse 'wp-gpios' property of node '/ocp/mmc@48060000[0]'
[ 0.786858] of_get_named_gpiod_flags: can't parse 'wp-gpio' property of node '/ocp/mmc@48060000[0]'
[ 0.786870] omap_hsmmc 48060000.mmc: using lookup tables for GPIO lookup
[ 0.786883] omap_hsmmc 48060000.mmc: lookup for GPIO wp failed
[ 0.787330] vmmc: supplied by vbat
[ 0.818582] vdd_mpu: supplied by vbat
[ 0.824234] of_get_named_gpiod_flags: parsed 'gpios' property of node '/volume_keys@0/switch@9[0]' - status (0)
[ 0.824289] of_get_named_gpiod_flags: parsed 'gpios' property of node '/volume_keys@0/switch@10[0]' - status (0)
[ 0.824878] input: volume_keys@0 as /devices/platform/volume_keys@0/input/input0
[ 0.825735] rtc-mcp795 spi1.0: Read RTC called....!!!!
[ 0.831105] rtc-mcp795 spi1.0: Read from mcp795: 2017-11-28 18:36:18
[ 0.831154] rtc-mcp795 spi1.0: setting system clock to 2017-12-28 18:36:18 UTC (1514486178)
[ 0.839924] lis3_reg: disabling
[ 0.840336] ALSA device list:
[ 0.840352] No soundcards found.
[ 0.841824] Waiting for root device PARTUUID=cf53a43f-02...
[ 0.908747] mmc0: host does not support reading read-only switch, assuming write-enable
[ 0.911049] mmc0: new high speed SDHC card at address aaaa
[ 0.911914] mmcblk0: mmc0:aaaa SU04G 3.69 GiB
[ 0.913445] mmcblk0: p1 p2
[ 0.966181] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[ 0.966285] VFS: Mounted root (ext4 filesystem) on device 179:2.
[ 0.975771] devtmpfs: mounted
[ 0.976231] Freeing unused kernel memory: 256K (c0880000 - c08c0000)
[ 0.976241] This architecture does not have kernel memory protection.
[ 1.253115] systemd[1]: RTC configured in localtime, applying delta of 0 minutes to system time.
[ 1.327110] random: systemd: uninitialized urandom read (16 bytes read, 28 bits of entropy available)
[ 1.337066] random: systemd: uninitialized urandom read (16 bytes read, 28 bits of entropy available)
[ 1.364567] systemd[1]: systemd 229 running in system mode. (+PAM -AUDIT -SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP -LIBCRYPT)
[ 1.366264] systemd[1]: Detected architecture arm.
[ 1.370419] systemd[1]: Set hostname to <am335x-evm>.
[ 1.513179] random: systemd-gpt-aut: uninitialized urandom read (16 bytes read, 31 bits of entropy available)
[ 1.513617] random: systemd-gpt-aut: uninitialized urandom read (16 bytes read, 31 bits of entropy available)
[ 1.516599] random: systemd-sysv-ge: uninitialized urandom read (16 bytes read, 31 bits of entropy available)
[ 1.541948] random: systemd-sysv-ge: uninitialized urandom read (16 bytes read, 32 bits of entropy available)
[ 1.567350] random: systemd-sysv-ge: uninitialized urandom read (16 bytes read, 33 bits of entropy available)
[ 1.649763] random: systemd: uninitialized urandom read (16 bytes read, 37 bits of entropy available)
[ 1.650386] random: systemd: uninitialized urandom read (16 bytes read, 37 bits of entropy available)
[ 1.652309] random: systemd: uninitialized urandom read (16 bytes read, 37 bits of entropy available)
[ 2.066947] systemd[1]: [/lib/systemd/system/gadget-init.service:15] Unknown lvalue 'ExecStopPre' in section 'Service'
[ 2.204731] systemd[1]: Configuration file /lib/systemd/system/psplash-stop.service is marked executable. Please remove executabl.
[ 2.310498] systemd[1]: Configuration file /lib/systemd/system/psplash-start.service is marked executable. Please remove executab.
[ 2.311738] systemd[1]: [/lib/systemd/system/psplash-start.service:4] Unknown lvalue 'OnBootSec' in section 'Unit'
[ 2.372590] systemd[1]: basic.target: Found ordering cycle on basic.target/start
[ 2.372653] systemd[1]: basic.target: Found dependency on sockets.target/start
[ 2.372691] systemd[1]: basic.target: Found dependency on dbus.socket/start
[ 2.372720] systemd[1]: basic.target: Found dependency on sysinit.target/start
[ 2.372747] systemd[1]: basic.target: Found dependency on alignment.service/start
[ 2.372773] systemd[1]: basic.target: Found dependency on basic.target/start
[ 2.372803] systemd[1]: basic.target: Breaking ordering cycle by deleting job sockets.target/start
[ 2.372835] systemd[1]: sockets.target: Job sockets.target/start deleted to break ordering cycle starting with basic.target/start
[ 2.385658] systemd[1]: basic.target: Found ordering cycle on basic.target/start
[ 2.385704] systemd[1]: basic.target: Found dependency on sysinit.target/start
[ 2.385738] systemd[1]: basic.target: Found dependency on alignment.service/start
[ 2.385771] systemd[1]: basic.target: Found dependency on basic.target/start
[ 2.385799] systemd[1]: basic.target: Breaking ordering cycle by deleting job alignment.service/start
[ 2.385833] systemd[1]: alignment.service: Job alignment.service/start deleted to break ordering cycle starting with basic.targett
[ 2.405865] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[ 2.409374] systemd[1]: Created slice System Slice.
[ 2.435718] systemd[1]: Listening on Journal Socket (/dev/log).
[ 2.436284] systemd[1]: Listening on Journal Socket.
[ 2.442179] systemd[1]: Mounting Debug File System...
[ 2.458998] systemd[1]: Mounting POSIX Message Queue File System...
[ 2.473663] systemd[1]: Mounting Temporary Directory...
[ 2.552122] systemd[1]: Starting Load Kernel Modules...
[ 2.557915] systemd[1]: Starting Setup Virtual Console...
[ 2.587446] systemd[1]: Reached target Swap.
[ 2.608939] systemd[1]: Created slice system-getty.slice.
[ 2.614568] systemd[1]: Starting Remount Root and Kernel File Systems...
[ 2.615624] systemd[1]: Listening on Network Service Netlink Socket.
[ 2.652733] systemd[1]: Starting Synchronize System and HW clocks...
[ 2.653377] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
[ 2.674274] cryptodev: driver 1.8 loaded.
[ 2.694565] systemd[1]: Listening on Syslog Socket.
[ 2.726815] systemd[1]: Starting Journal Service...
[ 2.767287] systemd[1]: Starting Create list of required static device nodes for the current kernel...
[ 2.767985] systemd[1]: Listening on udev Control Socket.
[ 2.773653] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[ 2.780597] rtc-mcp795 spi1.0: Set mcp795: 1917-11-28 18:36:20
[ 2.780629] rtc-mcp795 spi1.0: Write RTC called.....!!!!!
[ 2.786197] rtc-mcp795 spi1.0: Read RTC called....!!!!
[ 2.825457] rtc-mcp795 spi1.0: Read from mcp795: 2017-11-28 18:36:20
[ 2.871177] systemd[1]: Starting Psplash Boot Screen...
[ 2.871425] systemd[1]: Reached target Remote File Systems.
[ 2.872859] systemd[1]: Listening on udev Kernel Socket.
[ 2.874922] systemd[1]: Created slice system-serial\x2dgetty.slice.
[ 2.875684] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
[ 2.875902] systemd[1]: Reached target Paths.
[ 2.912057] systemd[1]: Created slice User and Session Slice.
[ 2.912335] systemd[1]: Reached target Slices.
[ 2.999532] systemd[1]: Mounted Debug File System.
[ 2.999820] systemd[1]: Mounted POSIX Message Queue File System.
[ 3.000035] systemd[1]: Mounted Temporary Directory.
[ 3.004229] systemd[1]: Started Load Kernel Modules.
[ 3.006487] systemd[1]: Started Setup Virtual Console.
[ 3.019584] systemd[1]: Started Remount Root and Kernel File Systems.
[ 3.022025] systemd[1]: Started Synchronize System and HW clocks.
[ 3.024209] systemd[1]: Started Create list of required static device nodes for the current kernel.
[ 3.034337] systemd[1]: Started Psplash Boot Screen.
[ 3.333301] systemd[1]: Started Journal Service.
[ 4.975205] systemd-journald[105]: Received request to flush runtime journal from PID 1
[ 7.160248] of_get_named_gpiod_flags: parsed 'row-gpios' property of node '/matrix_keypad@0[0]' - status (0)
[ 7.160304] of_get_named_gpiod_flags: parsed 'row-gpios' property of node '/matrix_keypad@0[1]' - status (0)
[ 7.160343] of_get_named_gpiod_flags: parsed 'row-gpios' property of node '/matrix_keypad@0[2]' - status (0)
[ 7.160388] of_get_named_gpiod_flags: parsed 'row-gpios' property of node '/matrix_keypad@0[3]' - status (0)
[ 7.160410] of_get_named_gpiod_flags: parsed 'col-gpios' property of node '/matrix_keypad@0[0]' - status (0)
[ 7.160439] of_get_named_gpiod_flags: parsed 'col-gpios' property of node '/matrix_keypad@0[1]' - status (0)
[ 7.161103] input: matrix_keypad@0 as /devices/platform/matrix_keypad@0/input/input1
[ 7.502188] input: ti-tsc as /devices/platform/ocp/44e0d000.tscadc/TI-am335x-tsc/input/input2
[ 7.534058] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec
[ 7.599576] am335x-phy-driver 47401300.usb-phy: GPIO lookup for consumer reset
[ 7.599617] am335x-phy-driver 47401300.usb-phy: using device tree for GPIO lookup
[ 7.599641] of_get_named_gpiod_flags: can't parse 'reset-gpios' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
[ 7.599656] of_get_named_gpiod_flags: can't parse 'reset-gpio' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
[ 7.599670] am335x-phy-driver 47401300.usb-phy: using lookup tables for GPIO lookup
[ 7.599685] am335x-phy-driver 47401300.usb-phy: lookup for GPIO reset failed
[ 7.599700] am335x-phy-driver 47401300.usb-phy: GPIO lookup for consumer vbus-detect
[ 7.599713] am335x-phy-driver 47401300.usb-phy: using device tree for GPIO lookup
[ 7.599727] of_get_named_gpiod_flags: can't parse 'vbus-detect-gpios' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
[ 7.599740] of_get_named_gpiod_flags: can't parse 'vbus-detect-gpio' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
[ 7.599753] am335x-phy-driver 47401300.usb-phy: using lookup tables for GPIO lookup
[ 7.599766] am335x-phy-driver 47401300.usb-phy: lookup for GPIO vbus-detect failed
[ 7.599859] 47401300.usb-phy supply vcc not found, using dummy regulator
[ 7.670858] am335x-phy-driver 47401b00.usb-phy: GPIO lookup for consumer reset
[ 7.670897] am335x-phy-driver 47401b00.usb-phy: using device tree for GPIO lookup
[ 7.670920] of_get_named_gpiod_flags: can't parse 'reset-gpios' property of node '/ocp/usb@47400000/usb-phy@47401b00[0]'
[ 7.670934] of_get_named_gpiod_flags: can't parse 'reset-gpio' property of node '/ocp/usb@47400000/usb-phy@47401b00[0]'
[ 7.670948] am335x-phy-driver 47401b00.usb-phy: using lookup tables for GPIO lookup
[ 7.670963] am335x-phy-driver 47401b00.usb-phy: lookup for GPIO reset failed
[ 7.670978] am335x-phy-driver 47401b00.usb-phy: GPIO lookup for consumer vbus-detect
[ 7.670991] am335x-phy-driver 47401b00.usb-phy: using device tree for GPIO lookup
[ 7.671005] of_get_named_gpiod_flags: can't parse 'vbus-detect-gpios' property of node '/ocp/usb@47400000/usb-phy@47401b00[0]'
[ 7.671018] of_get_named_gpiod_flags: can't parse 'vbus-detect-gpio' property of node '/ocp/usb@47400000/usb-phy@47401b00[0]'
[ 7.671031] am335x-phy-driver 47401b00.usb-phy: using lookup tables for GPIO lookup
[ 7.671044] am335x-phy-driver 47401b00.usb-phy: lookup for GPIO vbus-detect failed
[ 7.671159] 47401b00.usb-phy supply vcc not found, using dummy regulator
[ 8.216968] edt_ft5x06 2-0038: GPIO lookup for consumer reset
[ 8.217005] edt_ft5x06 2-0038: using device tree for GPIO lookup
[ 8.217027] of_get_named_gpiod_flags: can't parse 'reset-gpios' property of node '/ocp/i2c@4819c000/edt-ft5406@38[0]'
[ 8.217043] of_get_named_gpiod_flags: can't parse 'reset-gpio' property of node '/ocp/i2c@4819c000/edt-ft5406@38[0]'
[ 8.217056] edt_ft5x06 2-0038: using lookup tables for GPIO lookup
[ 8.217070] edt_ft5x06 2-0038: lookup for GPIO reset failed
[ 8.217085] edt_ft5x06 2-0038: GPIO lookup for consumer wake
[ 8.217097] edt_ft5x06 2-0038: using device tree for GPIO lookup
[ 8.217110] of_get_named_gpiod_flags: can't parse 'wake-gpios' property of node '/ocp/i2c@4819c000/edt-ft5406@38[0]'
[ 8.217123] of_get_named_gpiod_flags: can't parse 'wake-gpio' property of node '/ocp/i2c@4819c000/edt-ft5406@38[0]'
[ 8.217135] edt_ft5x06 2-0038: using lookup tables for GPIO lookup
[ 8.217148] edt_ft5x06 2-0038: lookup for GPIO wake failed
[ 8.248869] input: EP0790M09 as /devices/platform/ocp/4819c000.i2c/i2c-2/2-0038/input/input3
[ 8.329581] omap_rng 48310000.rng: OMAP Random Number Generator ver. 20
[ 8.869921] omap_hwmod: pruss: _wait_target_ready failed: -16
[ 8.979735] ti-pruss 4a300000.pruss: couldn't enable pruss
[ 8.985388] ti-pruss: probe of 4a300000.pruss failed with error -16
[ 10.140512] omap-sham 53100000.sham: hw accel on OMAP rev 4.3
[ 10.261376] random: nonblocking pool is initialized
[ 10.439829] remoteproc0: wkup_m3 is available
[ 10.439860] remoteproc0: Note: remoteproc is still under development and considered experimental.
[ 10.439873] remoteproc0: THE BINARY FORMAT IS NOT YET FINALIZED, and backward compatibility isn't yet guaranteed.
[ 10.939589] remoteproc0: powering up wkup_m3
[ 10.940810] remoteproc0: Booting fw image am335x-pm-firmware.elf, size 217232
[ 10.941134] remoteproc0: remote processor wkup_m3 is now up
[ 10.941171] wkup_m3_ipc 44e11324.wkup_m3_ipc: CM3 Firmware Version = 0x192
[ 11.019430] omap-aes 53500000.aes: OMAP AES hw accel rev: 3.2
[ 11.643941] [drm] Initialized pvr 1.14.3699939 20110701 on minor 1
[ 11.650274] PM: no-rtc available, rtc-only mode disabled.
[ 11.916940] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[ 15.470314] NET: Registered protocol family 15
[ 16.206243] Bluetooth: Core ver 2.21
[ 16.206382] NET: Registered protocol family 31
[ 16.206394] Bluetooth: HCI device and connection manager initialized
[ 16.206426] Bluetooth: HCI socket layer initialized
[ 16.206445] Bluetooth: L2CAP socket layer initialized
[ 16.206490] Bluetooth: SCO socket layer initialized
[ 16.886357] Initializing XFRM netlink socket
[ 17.278724] net eth0: initializing cpsw version 1.12 (0)
[ 17.278777] net eth0: initialized cpsw ale version 1.4
[ 17.278792] net eth0: ALE Table size 1024
[ 17.281637] net eth0: phy found : id is : 0x7c0f1
[ 17.281737] libphy: PHY 4a101000.mdio:01 not found
[ 17.286567] net eth0: phy "4a101000.mdio:01" not found on slave 1, err -19
[ 17.312604] usbcore: registered new interface driver usbfs
[ 17.312743] usbcore: registered new interface driver hub
[ 17.353004] usbcore: registered new device driver usb
[ 17.559028] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 17.581450] musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)
[ 17.581486] musb-hdrc: MHDRC RTL version 2.0
[ 17.581500] musb-hdrc: setup fifo_mode 4
[ 17.581526] musb-hdrc: 28/31 max ep, 16384/16384 memory
[ 17.581712] musb-hdrc musb-hdrc.0.auto: MUSB HDRC host driver
[ 17.581765] musb-hdrc musb-hdrc.0.auto: new USB bus registered, assigned bus number 1
[ 17.596362] hub 1-0:1.0: USB hub found
[ 17.596465] hub 1-0:1.0: 1 port detected
[ 17.739003] musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)
[ 17.739041] musb-hdrc: MHDRC RTL version 2.0
[ 17.739054] musb-hdrc: setup fifo_mode 4
[ 17.739081] musb-hdrc: 28/31 max ep, 16384/16384 memory
[ 17.739274] musb-hdrc musb-hdrc.1.auto: MUSB HDRC host driver
[ 17.739320] musb-hdrc musb-hdrc.1.auto: new USB bus registered, assigned bus number 2
[ 17.749201] musb-hdrc musb-hdrc.0.auto: VBUS_ERROR in a_wait_vrise (89, <AValid), retry #1, port1 00000104
[ 17.755102] hub 2-0:1.0: USB hub found
[ 17.755179] hub 2-0:1.0: 1 port detected
[ 17.901643] musb-hdrc musb-hdrc.0.auto: VBUS_ERROR in a_wait_vrise (89, <AValid), retry #2, port1 00000104
[ 18.054073] musb-hdrc musb-hdrc.0.auto: VBUS_ERROR in a_wait_vrise (89, <AValid), retry #3, port1 00000104
[ 18.206493] musb-hdrc musb-hdrc.0.auto: VBUS_ERROR in a_wait_vrise (88, <AValid), retry #3, port1 0008010c
[ 27.164729] PVR_K: UM DDK-(3699939) and KM DDK-(3699939) match. [ OK ]

DTS:

&i2c0 {
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins>;

status = "okay";
clock-frequency = <400000>;

tps: tps@2d {
reg = <0x2d>;
};

eeprom: eeprom@50 {
compatible = "at,24c256";
reg = <0x50>;
};
};

Hi Pavel,

I am colleague of Thejeswarareddy

Yes, we have verified the PINMUX. Also we have checked that i2cdetect is working fine its is detecting 2 I2C (0 and 2). I2C 0 is connected with EEPROM

I am able to write in EEPROM using direct echo as per below

Echo “hello” > /sys/bus/i2c/devices/1-0050/eeprom

Here is the log for your ref for few commands:

root@am335x-evm:~/bin# eeprom -f data -w
-sh: ./eeprom: No such file or directory
root@am335x-evm:~/bin# eeprom -f data -w
base-address of eeproms       : 0x50
number of pages to read       : 8 (0x50 .. 0x57)
file opened for reading       : data
            on filedescriptor : 3
i2c-devicenode is             : /dev/i2c-0
            on filedescriptor : 4

**WARNING**
 -      You have chosen to WRITE to this eeprom.
        Make sure that this tiny chip is *NOT* vital to the
        operation of your computer as you can easily corrupt
        the configuration memory of your SDRAM-memory-module,
        your IBM ThinkPad or whatnot...! Fixing these errors can be
        a time-consuming and very costly process!

Things to consider:
 -      You can have more than one i2c-bus, check in /proc/bus/i2c
        and specify the correct one with -d
        right now you have chosen to use '/dev/i2c-0'
 -      A eeprom can occupy several i2c-addresses (one per page)
        so please make sure that there is no vital eeprom in your computer
        sitting at addresses between 0x50 and 0x57
Enter 'yes' to continue:yes
Wrote 8 bytes to eeprom at 0x50, offset 00000000
ioctl(): Remote I/O error
ioctl returned -1

 

Note: Even after eeprom read (eeprom –r –f data) I am getting same ioctl error

root@am335x-evm:~# i2cget -f -y 0 0x50 0x00

0xff

 

 

root@am335x-evm:~# i2cset -f -y -r 0 0x50 0x00 0x32 b

Warning - data mismatch - wrote 0x32, read back 0xff

 

 

root@am335x-evm:~# i2cget -f -y 0 0x50 0x00

0xff

root@am335x-evm:~# i2cdump -f -y -r 0x00-0xff 0 0x50

No size specified (using byte-data access)

0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef

00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

root@am335x-evm:~# 

Hi Pavel,

I tried all the things but it is not writing, for more info please go through the below results.

=> i2c bus
Bus 0: i2c@44e0b000
Bus 1: i2c@4802a000
=> i2c dev 0
Setting bus to 0
=> i2c probe 0x50
Valid chip addresses: 50
=> i2c speed
Current bus speed=400000
=> i2c md 0x50 0
0000: 68 65 6c 6c 6f 5c 6e 0a 69 5c 6e 31 32 33 34 2d hello\n.i\n1234-
=> i2c md 0x50 0 1
0000: 68 h
=> i2c mw 0x50 0 0xab
=> i2c md 0x50 0 1
0000: 68 h
=> i2c mw 0x50 0 0x32
=> i2c md 0x50 0 1
0000: 68 h
=> i2c md 0x50 0 10
0000: 68 65 6c 6c 6f 5c 6e 0a 69 5c 6e 31 32 33 34 2d hello\n.i\n1234-
=>

Thanks in Advance!
Thejeswara Reddy R

Do you use TI board (EVM, SK, BBB) or custom board?

Hi Pavel,

We are using custom board which is having AM3354 SOC (AM335x EVM Link: www.ti.com/.../TMDXEVM3358).

Thanks in Advance!
Thejeswara Reddy R

Thejeswara,

This seems to me a HW malfunction of your custom board. Because I have the same EEPROM chip (cat24c256) in AM335x TI SK board, on i2c0 (addr 0x50), and it is working fine with the default u-boot code base. Have you change anything in the u-boot code base regarding cat24c256 and i2c?

ti-processor-sdk-linux-am335x-evm-x/board-support/u-boot-x/

I would suggest you to probe the I2C0 pins with scope to check if you have valid and expected signals when doing u-boot read/write commands to the eeprom chip.

We have also I2C diagnostic test that you might try to re-use for your custom board:

processors.wiki.ti.com/.../AM335x_Starter_Kit_Diagnostics

You can also compare the schematics of AM335x TI SK and your custom board (in the I2C part) and check for differences.

Regards,
Pavel