From: Mark A. Greer <mgreer@animalcreek.com>
Date: Tue, 2 Sep 2014 22:12:24 +0000 (-0700)
Subject: NFC: trf7970a: Add RF technology specific guard times
X-Git-Tag: fixes-against-v3.18-rc2~144^2~39^2~72^2~57
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4e64eff837fb682dfb2a1188fb036d75ec57375c;p=pandora-kernel.git

NFC: trf7970a: Add RF technology specific guard times

When turning on the RF field, the driver must wait
an RF-technology-specific amount of time (known as
the guard time) before modulating the field.
Currently, the driver waits 5 ms but that is too
short for NFCF and too long for ISO/IEC 15693.
Fix this by determining the guard time when the
RF technology is set and delaying that amount
of time when turning on the RF field.

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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