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ubports_kernel_google_msm/include/linux
Pavankumar Kondeti 1f98b2440e USB: msm_otg: Fix data contact detection issue
Data contact detection (DCD) involves applying small amount of current on
D+ and waiting for it to go low.  The D+ is pulled to low when the data
pins get contacted with the other device data pins.

The current code does not disable D+ pull-down resistor during DCD. If this
resistor is not disabled, the current applied on D+ becomes low immediately
even without connecting to any device.  Fix it.  Remove enable_dcd flag
from platform data as data contact detection is working reliably on all
targets supported by this driver.

(cherry picked from commit 768dcb817554a29b43e269e7cf77785a7f960754)

Change-Id: Idb34508f09dc74983fd2b55bd11f4073ec354e2f
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Neha Pandey <nehap@codeaurora.org>
2013-03-07 15:17:50 -08:00
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