Messages in this thread | | | From | Arnd Bergmann <> | Date | Wed, 7 Jun 2017 09:58:04 +0200 | Subject | Re: [PATCH 12/17] tty: New RISC-V SBI Console Driver |
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On Wed, Jun 7, 2017 at 9:15 AM, Geert Uytterhoeven <geert@linux-m68k.org> wrote: > CC (hypervisor) console folks > > On Wed, Jun 7, 2017 at 1:00 AM, Palmer Dabbelt <palmer@dabbelt.com> wrote: >> This patch adds a new driver for the console availiable via the RISC-V >> SBI. This console is specified to be used for early boot messages, and >> is designed to be a very simple (albiet somewhat slow) console that is >> always availiable. All RISC-V systems have an SBI console. >> >> The SBI console is made availiable for early printk messages and is also >> availiable as a regular console. >> >> Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com> >> --- >> drivers/tty/hvc/Kconfig | 11 +++++ >> drivers/tty/hvc/Makefile | 1 + >> drivers/tty/hvc/hvc_sbi.c | 102 ++++++++++++++++++++++++++++++++++++++++++++++ >> 3 files changed, 114 insertions(+) >> create mode 100644 drivers/tty/hvc/hvc_sbi.c >> >> diff --git a/drivers/tty/hvc/Kconfig b/drivers/tty/hvc/Kconfig >> index 574da15fe618..f3774adab240 100644 >> --- a/drivers/tty/hvc/Kconfig >> +++ b/drivers/tty/hvc/Kconfig >> @@ -114,4 +114,15 @@ config HVCS >> which will also be compiled when this driver is built as a >> module. >> >> +config HVC_SBI >> + bool "SBI console support" >> + depends on RISCV >> + select HVC_DRIVER >> + default y >> + help >> + This enables support for console output via RISC-V SBI calls, which >> + is normally used only during boot to output printk. >> + >> + If you don't know what do to here, say Y. >> + >> endif # TTY
Please move this a little higher along with the other HVC_DRIVER implementations.
>> + * RISC-V SBI interface to hvc_console.c >> + * based on drivers-tty/hvc/hvc_udbg.c >> + * >> + * Copyright (C) 2008 David Gibson, IBM Corporation >> + * Copyright (C) 2012 Regents of the University of California
2017?
Arnd
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