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NFC: trf7970a: Reset FIFO when 'End of TX' Interrupt Occurs

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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>
This commit is contained in:
Mark A. Greer 2014-03-25 08:54:32 -07:00 committed by Samuel Ortiz
parent b887eb09d3
commit 4dd836e46c
1 changed files with 3 additions and 1 deletions
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4
drivers/nfc/trf7970a.c
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@ -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;