[PATCH 0/6] DT early console initialization

Rob Herring
2014-05-08T22:23:59Z

This series adds support for early serial console initialization using
DT. This enables determining the serial port type and address using the
FDT and allows enabling the console before platform specific
initialization runs. I've tested this on arm64. ARM support is dependent
on adding fixmap support.

Currently, the earlycon is only enabled if "earlycon" is present on the
kernel command line. The FDT needs to have /chosen/stdout-path set to
the path of the serial port.

This series is dependent on generic earlycon[1], libfdt support[2], and
vmlinux.lds.h clean-ups[3]. The first 2 are in linux-next already. A git
branch is available here:

git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git earlycon-dt

Rob

[1] https://lkml.org/lkml/2014/4/18/573
[2] https://lkml.org/lkml/2014/4/22/1202
[3] https://lkml.org/lkml/2014/3/27/285

Rob Herring (6):
of: align RESERVEDMEM_OF_DECLARE function callbacks to other callbacks
of: consolidate linker section OF match table declarations
serial: earlycon: add DT support
of/fdt: add FDT address translation support
of/fdt: add FDT serial scanning for earlycon
tty/serial: pl011: add DT based earlycon support

drivers/clocksource/clksrc-of.c | 2 +-
drivers/irqchip/irqchip.h | 7 +-
drivers/of/Makefile | 2 +
drivers/of/fdt.c | 56 +++++++++
drivers/of/fdt_address.c | 241 ++++++++++++++++++++++++++++++++++++++
drivers/of/of_reserved_mem.c | 2 +-
drivers/tty/serial/amba-pl011.c | 1 +
drivers/tty/serial/earlycon.c | 27 +++++
include/asm-generic/vmlinux.lds.h | 4 +-
include/linux/clk-provider.h | 5 +-
include/linux/clocksource.h | 16 +--
include/linux/of.h | 22 ++++
include/linux/of_fdt.h | 1 +
include/linux/of_reserved_mem.h | 22 +---
include/linux/serial_core.h | 6 +
15 files changed, 372 insertions(+), 42 deletions(-)
create mode 100644 drivers/of/fdt_address.c

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1.9.1