Commit 4dd836e4 authored Mar 25, 2014 by Mark A. Greer Committed by Samuel Ortiz Apr 22, 2014

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>

parent b887eb09

drivers/nfc/trf7970a.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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;

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