iMX6ULL Booting error

NibinDasS — Wed, 04 Nov 2020 06:59:10 GMT

Hi Team,

I have designed an board with iMX6ULL. The board is powered ON successfully and while booting, the below pint is displayed.

U-Boot 2016.03-nxp/imx_v2016.03_4.1.15_2.0.0_ga+ga57b13b (Nov 02 2020 - 12:48:26 +0530)

CPU: Freescale i.MX6ULL rev1.1 69 MHz (running at 396 MHz)
CPU: Industrial temperature grade (-40C to 105C) at 55C
Reset cause: POR
Board: i.MX6ULL iW-RAINBOW-G18M-SM
Boot Device: NAND
I2C: ready
DRAM: 256 MiB
wait_for_sr_state: Arbitration lost sr=f2 cr=98 state=202
wait_for_sr_state: failed sr=a2 cr=88 state=2000
i2c_imx_stop:trigger stop failed
i2c_init_transfer: failed for chip 0x8 retry=0
force_idle_bus: sda=0 scl=1 sda.gp=0x1d scl.gp=0x1c
wait_for_sr_state: Arbitration lost sr=f2 cr=98 state=202
wait_for_sr_state: failed sr=a2 cr=88 state=2000
i2c_imx_stop:trigger stop failed
i2c_init_transfer: failed for chip 0x8 retry=1
force_idle_bus: sda=0 scl=1 sda.gp=0x1d scl.gp=0x1c
wait_for_sr_state: Arbitration lost sr=f2 cr=98 state=202
wait_for_sr_state: failed sr=a2 cr=88 state=2000
i2c_imx_stop:trigger stop failed
i2c_init_transfer: failed for chip 0x8 retry=2
force_idle_bus: sda=0 scl=1 sda.gp=0x1d scl.gp=0x1c
i2c_init_transfer: give up i2c_regs=0x21a0000
Can't find PMIC:PFUZE3000
initcall sequence 8ff91a8c failed at call 87804914 (err=-1)
### ERROR ### Please RESET the board ###

I have tried resetting the board multiple times and observed same print.

One of the GPIO (E5 pin of CPU - CSI_PIXCLK) we are using for enabling peripheral power control for the switch. By default the GPIO is externally pulled down.

When the external pulldown is removed for the same GPIO, the board is successfully booting.

Kindly let me know what is the reason for such error when the pin is pulled down.

Thanks and Regards,

Nibin

Re: iMX6ULL Booting error

igorpadykov — Wed, 04 Nov 2020 09:43:09 GMT

Hi Nibin

by default CSI_PIXCLK E5 pin is input with keeper as described in

Table 91. 14 x 14 mm Functional Contact Assignments

i.MX 6ULL Applications Processors for Industrial Products , so you can check

suitable for pmic level with oscillocope and set external pull resistor appropriately.

Best regards
igor

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iMX6ULL Booting error

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