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Diffstat (limited to 'drivers/tty/Kconfig')
| -rw-r--r-- | drivers/tty/Kconfig | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index 33175504bb39..8816f53e004d 100644 --- a/drivers/tty/Kconfig +++ b/drivers/tty/Kconfig @@ -354,3 +354,37 @@ config TRACE_SINK If you select this option, you need to select "Trace data router for MIPI P1149.7 cJTAG standard". + +config PPC_EPAPR_HV_BYTECHAN + tristate "ePAPR hypervisor byte channel driver" + depends on PPC + help + This driver creates /dev entries for each ePAPR hypervisor byte + channel, thereby allowing applications to communicate with byte + channels as if they were serial ports. + +config PPC_EARLY_DEBUG_EHV_BC + bool "Early console (udbg) support for ePAPR hypervisors" + depends on PPC_EPAPR_HV_BYTECHAN + help + Select this option to enable early console (a.k.a. "udbg") support + via an ePAPR byte channel. You also need to choose the byte channel + handle below. + +config PPC_EARLY_DEBUG_EHV_BC_HANDLE + int "Byte channel handle for early console (udbg)" + depends on PPC_EARLY_DEBUG_EHV_BC + default 0 + help + If you want early console (udbg) output through a byte channel, + specify the handle of the byte channel to use. + + For this to work, the byte channel driver must be compiled + in-kernel, not as a module. + + Note that only one early console driver can be enabled, so don't + enable any others if you enable this one. + + If the number you specify is not a valid byte channel handle, then + there simply will be no early console output. This is true also + if you don't boot under a hypervisor at all. |