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Commit 764763f0 authored by Peter Chen's avatar Peter Chen
Browse files

doc: usb: chipidea: update the doc for OTG FSM 



Since we have added otg version and HNP polling support, update
related documentation.

Signed-off-by: default avatarPeter Chen <peter.chen@nxp.com>
parent 4e332df6

Documentation/usb/chipidea.txt

+8 −5
Original line number Diff line number Diff line
@@ -3,14 +3,17 @@ 
To show how to demo OTG HNP and SRP functions via sys input files

with 2 Freescale i.MX6Q sabre SD boards.



1.1 How to enable OTG FSM in menuconfig

1.1 How to enable OTG FSM

---------------------------------------

Select CONFIG_USB_OTG_FSM, rebuild kernel Image and modules.

If you want to check some internal variables for otg fsm,

mount debugfs, there are 2 files which can show otg fsm

variables and some controller registers value:

1.1.1 Select CONFIG_USB_OTG_FSM in menuconfig, rebuild kernel

Image and modules. If you want to check some internal

variables for otg fsm, mount debugfs, there are 2 files

which can show otg fsm variables and some controller registers value:

cat /sys/kernel/debug/ci_hdrc.0/otg

cat /sys/kernel/debug/ci_hdrc.0/registers

1.1.2 Add below entries in your dts file for your controller node

	otg-rev = <0x0200>;

	adp-disable;



1.2 Test operations

-------------------