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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/usb/chipidea.txt | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/usb/chipidea.txt b/Documentation/usb/chipidea.txt index 43cc0c82d393..678ebb986f55 100644 --- a/Documentation/usb/chipidea.txt +++ b/Documentation/usb/chipidea.txt @@ -77,6 +77,17 @@ compliant(with otg descriptor comply with USB OTG and EH 2.0 as a peripheral): - ether - serial +1.5 Runtime enable and disable full HNP +--------------------------------------- +One more input file is created: +/sys/bus/platform/devices/ci_hdrc.0/inputs/hnp_enable + +Defaultly USB OTG full HNP(do role switch by SW protocol, no need exchange OTG +plug) is not enabled, user can enable or disable it after disconnect from other +end device by: + echo 1 or 0 > /sys/bus/platform/devices/ci_hdrc.0/inputs/hnp_enable +If this input is 0, only OTG role switch by ID pin detection can be supported. + 2. How to enable USB as system wakeup source ----------------------------------- Below is the example for how to enable USB as system wakeup source |