NFC: trf7970a: Add RF technology specific guard times

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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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Mark A. Greer 2014-09-02 15:12:24 -07:00 • committed by Samuel Ortiz

parent a08e54549e

commit 4e64eff837

1 changed files with 13 additions and 1 deletions

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drivers/nfc/trf7970a.c

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