kernel will automatically use the first serial line, /dev/ttyS0, as
system console.
- you can set that using a kernel command line option such as
+ You can set that using a kernel command line option such as
"console=uart8250,io,0x3f8,9600n8"
"console=uart8250,mmio,0xff5e0000,115200n8".
- and it will switch to normal serial console when correponding port is
- ready.
+ and it will switch to normal serial console when the corresponding
+ port is ready.
"earlycon=uart8250,io,0x3f8,9600n8"
"earlycon=uart8250,mmio,0xff5e0000,115200n8".
it will not only setup early console.
config SERIAL_BFIN_DMA
bool "DMA mode"
- depends on DMA_UNCACHED_1M && !KGDB_UART
+ depends on !DMA_UNCACHED_NONE && !KGDB_UART
help
This driver works under DMA mode. If this option is selected, the
blackfin simple dma driver is also enabled.
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