summaryrefslogtreecommitdiffstats
path: root/Documentation/serial/serial-rs485.txt
Commit message (Collapse)AuthorAgeFilesLines
* RS485: fix inconsistencies in the meaning of some variablesClaudio Scordino2011-11-151-3/+11
| | | | | | | | | | | | | | | | | | | | | | | The crisv10.c and the atmel_serial.c serial drivers intepret the fields of the serial_rs485 structure in a different way. In particular, crisv10.c uses SER_RS485_RTS_AFTER_SEND and SER_RS485_RTS_ON_SEND for the voltage of the RTS pin; atmel_serial.c, instead, uses these values to know if a delay must be set before and after sending. This patch makes the usage of these variables consistent across all drivers and fixes the Documentation as well. From now on, SER_RS485_RTS_AFTER_SEND and SER_RS485_RTS_ON_SEND will be used to set the voltage of the RTS pin (as in the crisv10.c driver); the delay will be understood by looking only at the value of delay_rts_before_send and delay_rts_after_send. Signed-off-by: Claudio Scordino <claudio@evidence.eu.com> Signed-off-by: Darron Black <darron@griffin.net> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty/serial: RS485 bindings for device treeNicolas Ferre2011-10-181-0/+5
| | | | | | | | | | Generic bindings for RS485 feature included in some UARTs. Those bindings have to be used withing an UART device tree node. Documentation updated to link to the bindings definition. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* atmel_serial: RS485: receiving enabled when sending dataBernhard Roth2011-08-241-0/+3
| | | | | | | | | | | By default the atmel_serial driver in RS485 mode disables receiving data until all data in the send buffer has been sent. This flag allows to receive data even whilst sending data. Signed-off-by: Bernhard Roth <br@pwrnet.de> Signed-off-by: Claudio Scordino <claudio@evidence.eu.com> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* RS485 documentation: add 16C950 UART descriptionYegor Yefremov2010-11-301-4/+5
| | | | | | | Add a notion about 16C950 UART, that is using DTR signal for RS485 mode. Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* serial: add Documentation about RS485 serial communicationsClaudio Scordino2010-11-111-0/+119
Documentation about RS485 serial communications Signed-off-by: Claudio Scordino <claudio@evidence.eu.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Russell King <linux@arm.linux.org.uk> Acked-by: Grant Edwards <grant.b.edwards@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
OpenPOWER on IntegriCloud