linux/drivers/tty/hvc
Rob Herring f377775dc0 TTY: hvc_dcc: probe for a JTAG connection before registering
Enabling the ARM DCC console and using without a JTAG connection will
simply hang the system. Since distros like to turn on all options, this
is a reoccurring problem to debug. We can do better by checking if
anything is attached and handling characters. There is no way to probe
this, so send a newline and check that it is handled.

Cc: Paolo Pisati <paolo.pisati@canonical.com>
Cc: Tim Gardner <tim.gardner@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-25 18:10:56 -07:00
..
hvc_beat.c serial: Kill off NO_IRQ 2012-01-26 17:14:50 -08:00
hvc_bfin_jtag.c hvc: add Blackfin JTAG console support 2011-02-17 11:12:40 -08:00
hvc_console.c tty/hvc_console: Add DTR/RTS callback to handle HUPCL control 2013-07-24 15:21:13 -07:00
hvc_console.h tty/hvc_console: Add DTR/RTS callback to handle HUPCL control 2013-07-24 15:21:13 -07:00
hvc_dcc.c TTY: hvc_dcc: probe for a JTAG connection before registering 2013-09-25 18:10:56 -07:00
hvc_irq.c TTY: irq: Remove IRQF_DISABLED 2011-09-22 16:08:57 -07:00
hvc_iucv.c tty/hvc_iucv: Disconnect IUCV connection when lowering DTR 2013-07-24 15:21:13 -07:00
hvc_opal.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
hvc_rtas.c serial: Kill off NO_IRQ 2012-01-26 17:14:50 -08:00
hvc_tile.c tile: various console improvements 2013-08-12 14:46:18 -04:00
hvc_udbg.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-03-21 18:55:10 -07:00
hvc_vio.c powerpc: Make device tree accesses in HVC VIO console endian safe 2013-08-14 15:33:29 +10:00
hvc_xen.c hvc_xen: Remove unnecessary __GFP_ZERO from kzalloc 2013-08-30 14:11:28 -07:00
hvcs.c drivers/tty/hvc: Use strlcpy instead of strncpy 2013-03-05 16:56:27 +11:00
hvsi_lib.c powerpc/hvsi: Increase handshake timeout from 200ms to 400ms. 2013-08-27 16:59:56 +10:00
hvsi.c TTY: add tty_port_tty_wakeup helper 2013-03-18 16:19:45 -07:00
Kconfig tty: Added a CONFIG_TTY option to allow removal of TTY 2013-01-18 16:15:27 -08:00
Makefile tty: powerpc: remove hvc_iseries 2012-03-09 10:35:17 +11:00