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usb address in imx7ulp and imx7d

Question asked by Asma Alekar on Jun 30, 2019
Latest reply on Jul 6, 2019 by igorpadykov

Hello All,

 

 First of all sorry if my question is silly,but I am trying to understand android build process. So, When I checked fstab.freescale for 7ulp evk and sabresd_7d I found following difference in the file.

 

evk -7ulp

/devices/platform/40000000.ahb-bridge0/40330000.usb/ci_hdrc.0* auto auto defaults voldmanaged=usb:auto

 

sabresd-7d

/devices/soc0/soc/30800000.aips-bus/30b20000.usb/ci_hdrc.1* auto auto defaults voldmanaged=usb:auto

 

After reading some documentation I understand 40000000.ahb-bridge0/40330000.usb & 30800000.aips-bus/30b20000.usb are the usb otg addresses as given in device tree.

 

but what I dont understand is: 

1. /devices/platform/ in 7ulp and /devices/soc0/soc/ in sabresd_7d

why there is no platform in 7d and extra soc0?

 

2. usb/ci_hdrc.0 & usb/ci_hdrc.1

why is this difference of 1 and 0 in the files?

 

can someone please explain me this difference. Your help would be much appreciated.

 

Regards,

Asma

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