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| author | Mark A. Greer <mgreer@animalcreek.com> | 2014-03-25 08:54:32 -0700 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2014-04-22 00:37:27 +0200 |
| commit | 4dd836e46c3ddcb2020646c867be589658440be0 (patch) | |
| tree | dcf43b03c625a20c53610effcd727efe4b0d91eb /drivers/nfc | |
| parent | b887eb09d3cbda145d9fff4b9a56c384edd07ed7 (diff) | |
| download | linux-rpi-4dd836e46c3ddcb2020646c867be589658440be0.tar.gz linux-rpi-4dd836e46c3ddcb2020646c867be589658440be0.tar.bz2 linux-rpi-4dd836e46c3ddcb2020646c867be589658440be0.zip | |
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.c | 4 |
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; |