w1: new w1_ds2406 driver
Some preliminary work at making use of this driver led me to implement
CRC-16 checks on read and write to deal with the occasional glitchiness of
the 1-Wire bus. The revised driver (attached) returns an I/O error if the
CRC check fails. When reading the chip's state, either you get a valid
indication or you get an I/O error. When changing its state, either the
change is successful or an I/O error is returned.
Signed-off-by: Scott Alfter <scott@alfter.us>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig
index 1cdce80..fd31d2f 100644
--- a/drivers/w1/slaves/Kconfig
+++ b/drivers/w1/slaves/Kconfig
@@ -38,6 +38,13 @@
Say Y here if you want to use a 1-wire
DS2413 Dual Channel Addressable Switch device support
+config W1_SLAVE_DS2406
+ tristate "Dual Channel Addressable Switch 0x12 family support (DS2406)"
+ help
+ Say Y or M here if you want to use a 1-wire
+ DS2406 Dual Channel Addressable Switch. EPROM read/write
+ support for these devices is not implemented.
+
config W1_SLAVE_DS2423
tristate "Counter 1-wire device (DS2423)"
select CRC16