>-----Original Message----- >From: Maupin, Chase >Sent: Monday, October 21, 2013 4:44 PM >To: [email protected] >Cc: Maupin, Chase >Subject: [PATCH][for-dora] udev: update local rules for new >touchscreen device
Please ignore this in favor of the patch from Tom Rini. > >* While working with a new capacitive touchscreen it was found > that the existing udev rule that creates the > /dev/input/touchscreen0 symlink was too restrictive and did not > match the MODALAIS entry for this touchscreen. which is: > > MODALIAS=input:b0018v0000p0000e0000- >e0,1,3,k14A,ra0,1,2F,35,36,39,mlsfw > >* By looking at the input_print_modalias function in the Linux > kernel drivers/input/input.c file and referencing the meaning > of the evbits and attributes of the input_dev structure it seems > that for identification of a touchscreen the match with ,18 > which was matching part of the absbit structure is overkill. > >* It seems that the absbit entry is used for devices like > touchscreens and if that the the "a" is followed by 0 and 1 this > is sufficient. > >* So the logic has now been changed to check for the "e" 0 and 3 > values which correspond to EV_SYN and EV_ABS, then check for > the "a" attribute with 0 and 1. > >Signed-off-by: Chase Maupin <[email protected]> >--- > meta/recipes-core/udev/udev/local.rules | 4 +++- > 1 files changed, 3 insertions(+), 1 deletions(-) > >diff --git a/meta/recipes-core/udev/udev/local.rules >b/meta/recipes-core/udev/udev/local.rules >index 72d92ef..d0cbf91 100644 >--- a/meta/recipes-core/udev/udev/local.rules >+++ b/meta/recipes-core/udev/udev/local.rules >@@ -17,5 +17,7 @@ > ACTION=="add", DEVPATH=="/devices/*", ENV{MODALIAS}=="?*", >RUN+="/sbin/modprobe $env{MODALIAS}" > > # Create a symlink to any touchscreen input device >-SUBSYSTEM=="input", KERNEL=="event[0-9]*", >ATTRS{modalias}=="input:*-e0*,3,*a0,1,*18,*", >SYMLINK+="input/touchscreen0" >+# Trigger based on input type, that the evbit (-e) has EV_SYN and >EV_ABS, >+# has an EV_ABS value (-a) which is used for touchscreen type >devices. >+SUBSYSTEM=="input", KERNEL=="event[0-9]*", >ATTRS{modalias}=="input:*-e0*,3,*a0,1,*", >SYMLINK+="input/touchscreen0" > >-- >1.7.0.4 _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
