Hi All,
I am using i.MX 535 with LTC3589-2 as PMIC. On power ON LDO1 of PMIC is given to NVCC_SRTC_PWR which is always on LDO. after that i am supposed to receive the PMIC_ON_REQ from processor to wake the PMIC for other supplies to ramp up, but processor not sending the PMIC_ON_REQ to PMIC resulting it is not booting, so i have added a pull up resistor to PMIC_ON_REQ with the LDO1 level, then processor started booting but after loading the U-Boot it struct at loading kernel.
I have tried using external regulator for VDD_ANA_PLL and tried to boot the processor but still struct at loading the kernel. If i remove the Pull up resistor to PMIC_ON_REQ, PMIC wont wake up at all as signal is not coming from the processor even at external supply used for VDD_ANA_PLL.
We are in production of this design and facing problem in few cards, production done with pull up resistor at PMIC_ON_REQ and without external regulator for VDD_ANA_PLL.
Boot message is shared below.
U-Boot 2009.08 (Oct 20 2011 - 13:11:26)
CPU: Freescale i.MX53 family 2.1V at 800 MHz
mx53 pll1: 800MHz
mx53 pll2: 400MHz
mx53 pll3: 432MHz
mx53 pll4: 455MHz
ipg clock : 66666666Hz
ipg per clock : 33333333Hz
uart clock : 66666666Hz
cspi clock : 108000000Hz
ahb clock : 133333333Hz
axi_a clock : 400000000Hz
axi_b clock : 200000000Hz
emi_slow clock: 133333333Hz
ddr clock : 400000000Hz
esdhc1 clock : 80000000Hz
esdhc2 clock : 80000000Hz
esdhc3 clock : 80000000Hz
esdhc4 clock : 80000000Hz
nfc clock : 26666666Hz
Board: MX53-LOCO 1.0 Rev. A
Boot Reason: [POR]
Boot Device: SD
I2C: ready
DRAM: 1 GB
MMC: FSL_ESDHC: 0,FSL_ESDHC: 1
In: serial
Out: serial
Err: serial
Error: Dont't found mc34708 or da9052 on board.
Net: got MAC address from IIM: 00:00:00:00:00:00
FEC0 [PRIME]
Hit any key to stop autoboot: 0
MMC read: dev # 0, block # 2048, count 6144 ... 6144 blocks read: OK
## Booting kernel from Legacy Image at 70800000 ...
Image Name: Linux-2.6.35.3-1129-g691c08a
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2793344 Bytes = 2.7 MB
Load Address: 70008000
Entry Point: 70008000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK
Starting kernel ...
After this no clock is sent to SD1. All supplies at this time are fine as same as at the start of boot.
With regards
Sanket Nadagoud
Sanket
This discussion is closed since no activity. If you still need help, please feel free to reply with an update to this discussion, or create another discussion.
Thanks,
Yixing
Sanket
We are sorry for getting back to you so late. Are you still stuck with the issue? If you have somehow resolved the issue, can we close the discussion? If you still need help, please feel free to reply with an update to this discussion.
Thanks,
Yixing
Hello Karina,
Somehow it came to, although I am a Vybrid support person.
May you "redirect" it, please?
Regards, Naoum Gitnik.