Hi all,
This patch series splits the 8250 driver into a universal/legacy driver
and a separate base port operations module.
Legacy IRQ chaining, RSA port resource management and probe config,
port storage, driver and console definition, module parameters and
linkage remain in the universal/legacy driver in 8250_core.c, which is
combined with 8250_pnp.c to form the 8250.ko driver binary (which retains
the 8250_core module alias)
The base port operations and the uart_config[] table are split into a
separate source file, 8250_port.c, which is combined with 8250_dma.c to
form the 8250_base.ko port operations module.
The universal/legacy 8250 driver continues to support every current
method of instantiating an 8250 port, including:
1. ISA ports via arch-defined SERIAL_PORT_DFNS macro
2. early_serial_setup() ports
3. userspace-defined "phantom" ports
4. "serial8250" platform devices
5. via serial8250_register_8250_port(), which includes PNP, PCI and multi-fn cards
This split retains support for all kinds of legacy behavior without the
maintenance burden or footprint when legacy support is not required.
The legacy support limited to this universal driver:
o ISA ports defined via SERIAL_PORT_DFNS macro
o serial8250_set_isa_configurator() hack for Intel CE4100 support
o IRQ chaining
o timer-based port polling
o PNP ports
o probing and resource allocation for Remote Supervisor Adapter (RSA)
o serial8250_register_8250_port() and its existing behavior of replacing
"found" ports with new ports and restoring/re-probing old ports
@ unregistration time
o user-definable 8250 ports
o early_serial_setup()
o cooperative ttyS port sharing with sun serial drivers
o all module parameters
The idea behind this split is to enable further development of
o a minimal, standalone 8250 platform driver (probably w/o PCI support)
o standalone 8250_omap driver
none of which are done ;)
This also provides a basis for some kind of ttyS port sharing since the
objectionable legacy behavior is isolated (because the universal/legacy driver
would not participate in ttyS port sharing).
NB: this series requires 'Extensible console matching & direct earlycon' series
Regards,
Peter Hurley (17):
serial: core: Add minor field to uart_port
serial: 8250: Compute ttyS index from port minor
serial: 8250: Remove duplicate ->handle_irq initialization
serial: 8250: Simplify capabilities reset at port unregister
serial: 8250: Move ns16550a_goto_hispeed() to local header
serial: 8250: Decouple core from skip_txen_test module param
serial: 8250: Separate 8250 console interface
serial: 8250: Separate legacy irq handling from core port operations
serial: 8250: Separate port initialization
serial: 8250: Encapsulate port i/o method init
serial: 8250: Initialize fixed type fields when setting defaults
serial: 8250: Initialize default dma handlers when setting defaults
serial: 8250: Get RSA resource iff CONFIG_SERIAL_8250_RSA
serial: 8250: Only get RSA resource when required
serial: 8250: Decouple RSA probe
serial: 8250: Declare base port operations const
serial: 8250: Split base port operations from universal driver
drivers/tty/serial/8250/8250.h | 32 +-
drivers/tty/serial/8250/8250_core.c | 2978 ++---------------------------------
drivers/tty/serial/8250/8250_port.c | 2849 +++++++++++++++++++++++++++++++++
drivers/tty/serial/8250/Makefile | 5 +-
drivers/tty/serial/serial_core.c | 1 +
include/linux/serial_8250.h | 22 +
include/linux/serial_core.h | 1 +
7 files changed, 3036 insertions(+), 2852 deletions(-)
create mode 100644 drivers/tty/serial/8250/8250_port.c
--
2.3.0
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