[PATCH v3 00/14] serial: liteuart: add IRQ support

Gabriel Somlo
2022-11-12T21:21:38Z

Add IRQ support to the LiteX LiteUART serial interface

Changes from v2:
- further split out "separate RX loop from poll timer" into
dedicated patches highlighting additional changes explicitly:
- factoring out tty_flip_buffer_push() (6/14)
- ack only RX events in RX loop (7/14)
- pass constant flag to uart_insert_char() directly (8/14)
- fix variable types in rx loop (9/14)
- separating RX loop from poll timer (10/14)
- added patch (11/14) to move function definitions to a more
convenient location, making subsequent changes easier to read
in diff patch form.
- fixes and clarifications for RX path IRQ support patch (now 12/14):
- only return IRQ_HANDLED for RX events
- use pr_fmt() to improve style of irq setup error message
- remove unnecessary locking from around single-register access
- modify TX path to support both IRQ-mode and polling (13/14)
- move polling-only liteuart_putchar() behind same conditional
(CONFIG_SERIAL_LITEUART_CONSOLE) as the rest of the code that's
still using it.

> Changes from v1:
> - split minor cosmetic changes out into individual patches
> (1/3 became 1..5/7)
> - patches 6/7 and 7/7 unchanged (used to be 2/3 and 3/3)

Gabriel Somlo (14):
serial: liteuart: use KBUILD_MODNAME as driver name
serial: liteuart: use bit number macros
serial: liteuart: remove unused uart_ops stubs
serial: liteuart: don't set unused port fields
serial: liteuart: minor style fix in liteuart_init()
serial: liteuart: move tty_flip_buffer_push() out of rx loop
serial: liteuart: rx loop should only ack rx events
serial: liteuart: simplify passing of uart_insert_char() flag
serial: liteuart: fix rx loop variable types
serial: liteuart: separate rx loop from poll timer
serial: liteuart: move function definitions
serial: liteuart: add IRQ support for the RX path
serial: liteuart: add IRQ support for the TX path
serial: liteuart: move polling putchar() function

drivers/tty/serial/liteuart.c | 226 +++++++++++++++++++++-------------
1 file changed, 142 insertions(+), 84 deletions(-)

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2.37.3