diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2007-04-04 18:19:43 +0400 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-09-22 08:49:21 +0400 |
| commit | e4533b243e5e0c3a26287a902a1ed0f8f5b1cec0 (patch) | |
| tree | 806ef6091f0a434c7c95560d6b24bcde113614ef /drivers/serial/Kconfig | |
| parent | c4d5e375470862fd741f93bf0686d7ac2f7fdce4 (diff) | |
| download | linux-e4533b243e5e0c3a26287a902a1ed0f8f5b1cec0.tar.xz | |
[POWERPC] Optionally use new device number for pmac_zilog
This adds the option for the pmac_zilog driver to use the major/minor
numbers recently allocated specifically for it (/dev/ttyPZn) instead
of the /dev/ttySn numbers. The advantage of doing this is that it
allows the pmac_zilog and 8250 drivers to coexist. The disadvantage
of doing this is that it is a user-visible ABI change and it will
break existing working setups on powermacs, and could be confusing to
users.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'drivers/serial/Kconfig')
| -rw-r--r-- | drivers/serial/Kconfig | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 81b52b7cca21..d6ae38e55d01 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -986,6 +986,31 @@ config SERIAL_PMACZILOG PowerMac machines. Say Y or M if you want to be able to these serial ports. +config SERIAL_PMACZILOG_TTYS + bool "Use ttySn device nodes for Zilog z85c30" + depends on SERIAL_PMACZILOG + help + The pmac_zilog driver for the z85C30 chip on many powermacs + historically used the device numbers for /dev/ttySn. The + 8250 serial port driver also uses these numbers, which means + the two drivers being unable to coexist; you could not use + both z85C30 and 8250 type ports at the same time. + + If this option is not selected, the pmac_zilog driver will + use the device numbers allocated for /dev/ttyPZn. This allows + the pmac_zilog and 8250 drivers to co-exist, but may cause + existing userspace setups to break. Programs that need to + access the built-in serial ports on powermacs will need to + be reconfigured to use /dev/ttyPZn instead of /dev/ttySn. + + If you enable this option, any z85c30 ports in the system will + be registered as ttyS0 onwards as in the past, and you will be + unable to use the 8250 module for PCMCIA or other 16C550-style + UARTs. + + Say N unless you need the z85c30 ports on your powermac + to appear as /dev/ttySn. + config SERIAL_PMACZILOG_CONSOLE bool "Console on PowerMac z85c30 serial port" depends on SERIAL_PMACZILOG=y |