Olliver Schinagl d960673681 drivers: pn532_i2c: Add retry on error mechanism ...

Currently, we very occasionally can EXNIO errors from pn532_i2c_write() ->
i2c_write() -> write(). This may happen about once every 30 seconds.
Based from the kernel sources, EXNIO happens if the chip no longer
responds to its own address.

To make sure we do not loose any sent packets, we retry to send
PN532_SEND_RETRIES number of times. Since we miss 1 every 30 or so
seconds, doing 1 retry should be fine.

This might be considered a hack as the failure may be some other timing
related issue.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>

2016-10-24 13:05:42 +02:00

..

acr122_pcsc.c

Fix out-of-bounds access in driver acr122_pcsc

2013-09-22 01:47:15 +02:00

acr122_pcsc.h

Adding link to AUTHORS in the copyright headers

2013-07-17 13:57:56 +02:00

acr122_usb.c

added support for ACR1222U-C1

2016-06-23 18:20:39 +06:00

acr122_usb.h

Adding link to AUTHORS in the copyright headers

2013-07-17 13:57:56 +02:00

acr122s.c

Fix typo baud<>bauds thanks to Polluks

2014-03-05 17:48:55 +01:00

acr122s.h

Adding link to AUTHORS in the copyright headers

2013-07-17 13:57:56 +02:00

arygon.c

Fix typo baud<>bauds thanks to Polluks

2014-03-05 17:48:55 +01:00

arygon.h

Adding link to AUTHORS in the copyright headers

2013-07-17 13:57:56 +02:00

Makefile.am

Add I2C protocol support for PN532.

2013-06-14 23:59:46 +02:00

pn53x_usb.c

Add SCM_SCL3712 support

2015-11-04 20:15:56 +01:00

pn53x_usb.h

Adding link to AUTHORS in the copyright headers

2013-07-17 13:57:56 +02:00

pn532_i2c.c

drivers: pn532_i2c: Add retry on error mechanism

2016-10-24 13:05:42 +02:00

pn532_i2c.h

Adding link to AUTHORS in the copyright headers

2013-07-17 13:57:56 +02:00

pn532_spi.c

Fix memory leak

2013-09-19 23:34:52 +02:00

pn532_spi.h

Adding link to AUTHORS in the copyright headers

2013-07-17 13:57:56 +02:00

pn532_uart.c

Fix typo baud<>bauds thanks to Polluks

2014-03-05 17:48:55 +01:00

pn532_uart.h

Adding link to AUTHORS in the copyright headers

2013-07-17 13:57:56 +02:00