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authorMark A. Greer <mgreer@animalcreek.com>2014-09-02 22:12:42 (GMT)
committerSamuel Ortiz <sameo@linux.intel.com>2014-09-07 21:13:45 (GMT)
commit851ee3cbf850501104e76683e439a4061f378a96 (patch)
tree698b971d53ad0a2876e1eb3b1e85bd53f42eafdc /drivers/mailbox
parent7149d6bfecadc255e9d964782a9fdd70f610f1ea (diff)
downloadlinux-851ee3cbf850501104e76683e439a4061f378a96.tar.xz
NFC: trf7970a: Don't turn on RF if there is already an RF field
Currently, the trf7970a driver blindly turns on its RF field when configuring its framing. This isn't a good idea if there is already a device generating an RF field. Instead, check if there is already an RF field present before turning on this device's RF field and, if there is, return EBUSY. Signed-off-by: Mark A. Greer <mgreer@animalcreek.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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