ACPI 5.0 specification introduces enumeration support for SPB buses. This
patch set adds the UART serial bus enumeration support to Linux using such
mechanism.
NOTE: The [PATCH 4/4] is only for the demonstration purpose and should not
be merged into any of the published Linux source tree.
History:
v1:
1. Add uart bus type subsystem (uart_bus).
2. Add physical uart target device and description
(uart_device/uart_board_info).
3. Add logical uart host adapter (klist).
4. Add uart target device attributes (tty_dev/tty_attrs/modem_lines).
5. Create tty_device<->uart_device links (host_node/target_node).
v2.
1. Change uart layer related stuff to tty layer.
2. Modify the order of the function parameters.
v3:
1. Add comments for the uart_board_info and the uart_device.
2. Add platform_data/archdata support.
3. Add ACPI binding and test the binding.
4. Add SERIAL_BUS kconfig item.
RFCs:
1. Do we need to rename uart_bus to tty_bus and rename uart_device to
tty_target?
2. Do we need a kernel driver for the uart_device?
3. Do we need to split uart_board_info.type into uart_board_info.id and
uart_board_info.type? How can ACPI fill the uart_board_info.type?
4. Do we need to set line discipline for the uart_board_info?
Lv Zheng (4):
UART: Add UART subsystem as a bus.
ACPI / UART: Add ACPI enumeration support for UART bus.
UART / 8250: Add declearation of serial8250 driver.
UART: Add dummy devices to test the enumeration.
drivers/acpi/Kconfig | 7 +
drivers/acpi/Makefile | 1 +
drivers/acpi/acpi_uart.c | 263 ++++++++++++++++++++
drivers/acpi/scan.c | 1 +
drivers/tty/serial/8250/8250.c | 17 +-
drivers/tty/serial/8250/8250_dummy.c | 129 ++++++++++
drivers/tty/serial/8250/Kconfig | 10 +
drivers/tty/serial/8250/Makefile | 1 +
drivers/tty/serial/Kconfig | 8 +
drivers/tty/serial/Makefile | 1 +
drivers/tty/serial/serial_bus.c | 435 ++++++++++++++++++++++++++++++++++
include/linux/acpi_uart.h | 40 ++++
include/linux/mod_devicetable.h | 5 +
include/linux/serial_8250.h | 2 +
include/linux/serial_bus.h | 126 ++++++++++
15 files changed, 1043 insertions(+), 3 deletions(-)
create mode 100644 drivers/acpi/acpi_uart.c
create mode 100644 drivers/tty/serial/8250/8250_dummy.c
create mode 100644 drivers/tty/serial/serial_bus.c
create mode 100644 include/linux/acpi_uart.h
create mode 100644 include/linux/serial_bus.h
--
1.7.10
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