CONFIG_SERIAL_PMACZILOG_TTYS: Use ttySn device nodes for Zilog z85c30

General informations

The Linux kernel configuration item CONFIG_SERIAL_PMACZILOG_TTYS has multiple definitions:

Use ttySn device nodes for Zilog z85c30 found in drivers/tty/serial/Kconfig

The configuration item CONFIG_SERIAL_PMACZILOG_TTYS:

• prompt: Use ttySn device nodes for Zilog z85c30
• type: bool
• depends on: CONFIG_SERIAL_PMACZILOG
• defined in drivers/tty/serial/Kconfig
• found in Linux kernels: 2.6.38–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD

Help text

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 (Power)Mac to appear as /dev/ttySn.

Use ttySn device nodes for Zilog z85c30 found in drivers/serial/Kconfig

The configuration item CONFIG_SERIAL_PMACZILOG_TTYS:

• prompt: Use ttySn device nodes for Zilog z85c30
• type: bool
• depends on: CONFIG_SERIAL_PMACZILOG
• defined in drivers/serial/Kconfig
• found in Linux kernels: 2.6.24–2.6.37

Help text

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 (Power)Mac to appear as /dev/ttySn.

Hardware

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The data is retrived from:

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• Linux Kernel Driver DataBase (LKDDb)

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