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

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

Signed-off-by: Peter Chen <peter.chen@nxp.com>
This commit is contained in:
Peter Chen 2016-04-13 15:16:52 +08:00
parent 4e332df634
commit 764763f0a0
1 changed files with 8 additions and 5 deletions
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13
Documentation/usb/chipidea.txt
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@ -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
-------------------