summaryrefslogtreecommitdiffstats
path: root/drivers/nfc
diff options
context:
space:
mode:
authorMark A. Greer <mgreer@animalcreek.com>2014-03-25 08:54:32 -0700
committerSamuel Ortiz <sameo@linux.intel.com>2014-04-22 00:37:27 +0200
commit4dd836e46c3ddcb2020646c867be589658440be0 (patch)
treedcf43b03c625a20c53610effcd727efe4b0d91eb /drivers/nfc
parentb887eb09d3cbda145d9fff4b9a56c384edd07ed7 (diff)
downloadlinux-4dd836e46c3ddcb2020646c867be589658440be0.tar.bz2
NFC: trf7970a: Reset FIFO when 'End of TX' Interrupt Occurs
Sometimes after sending a frame there is tx data leftover in the FIFO which the driver will think is part of the receive frame. That data can be cleared when an 'End of TX' interrupt is received by issuing the 'FIFO Reset' command. Signed-off-by: Mark A. Greer <mgreer@animalcreek.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc')
-rw-r--r--drivers/nfc/trf7970a.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index df634498c81b..a2e0a21d6ea2 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -681,7 +681,9 @@ static irqreturn_t trf7970a_irq(int irq, void *dev_id)
trf->ignore_timeout =
!cancel_delayed_work(&trf->timeout_work);
trf7970a_drain_fifo(trf, status);
- } else if (!(status & TRF7970A_IRQ_STATUS_TX)) {
+ } else if (status == TRF7970A_IRQ_STATUS_TX) {
+ trf7970a_cmd(trf, TRF7970A_CMD_FIFO_RESET);
+ } else {
trf7970a_send_err_upstream(trf, -EIO);
}
break;