diff options
| author | Anup Patel <anup@brainfault.org> | 2018-12-04 19:25:05 +0530 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@sifive.com> | 2019-01-09 14:59:57 -0800 |
| commit | 27de1f541f1f911bc2242ae68ef7375247b36c7d (patch) | |
| tree | 1f88825dd6ee4aa8424f9f71f9ca1e6a0aed3158 /drivers/tty/serial/Kconfig | |
| parent | 801009424e05cf110f016d7fac7fcf20ef94941a (diff) | |
| download | linux-27de1f541f1f911bc2242ae68ef7375247b36c7d.tar.bz2 | |
tty/serial: Add RISC-V SBI earlycon support
In RISC-V, the M-mode runtime firmware provide SBI calls for
debug prints. This patch adds earlycon support using RISC-V
SBI console calls. To enable it, just pass "earlycon=sbi" in
kernel parameters.
Signed-off-by: Anup Patel <anup@brainfault.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'drivers/tty/serial/Kconfig')
| -rw-r--r-- | drivers/tty/serial/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 67b9bf3b500e..089a6f285d5e 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -85,6 +85,18 @@ config SERIAL_EARLYCON_ARM_SEMIHOST with "earlycon=smh" on the kernel command line. The console is enabled when early_param is processed. +config SERIAL_EARLYCON_RISCV_SBI + bool "Early console using RISC-V SBI" + depends on RISCV + select SERIAL_CORE + select SERIAL_CORE_CONSOLE + select SERIAL_EARLYCON + help + Support for early debug console using RISC-V SBI. This enables + the console before standard serial driver is probed. This is enabled + with "earlycon=sbi" on the kernel command line. The console is + enabled when early_param is processed. + config SERIAL_SB1250_DUART tristate "BCM1xxx on-chip DUART serial support" depends on SIBYTE_SB1xxx_SOC=y |