Hi all,
This RFC patch series contains updates to the Renesas SCI UART driver,
related to hardware flow control:
- Device Tree binding updates for GPIO-controlled modem lines, and for
dedicated RTS/CTS modem lines,
- Driver support for GPIO-controlled modem lines, using the
SERIAL_MCTRL_GPIO helpers,
- Some preparations for fixing hardware-assisted flow control using
the dedicated RTS/CTS modem lines later.
This was tested on r8a7791/koelsch, using UART and GPIO pins on expansion
connectors (I've pushed a few more DT overlays for testing to the
topic/renesas-overlays branch of
https://git.kernel.org/cgit/linux/kernel/git/geert/renesas-drivers.git)
Testing for regressions on platforms without DT and/or GPIOLIB support
(SuperH) would be appreciated.
Compile-tested on ecovec24_defconfig(GPIOLIB=y) and se7780_defconfig
(GPIOLIB=n).
Thanks for your comments!
Geert Uytterhoeven (5):
serial: sh-sci: Update DT binding documentation for GPIO modem lines
serial: sh-sci: Update DT binding documentation for dedicated RTS/CTS
serial: sh-sci: Always set TIOCM_CTS in .get_mctrl() callback
serial: sh-sci: Add support for GPIO-controlled modem lines
serial: sh-sci: Replace SCIx_HAVE_RTSCTS by standard UPF_HARD_FLOW
.../bindings/serial/renesas,sci-serial.txt | 8 +++++
drivers/tty/serial/Kconfig | 1 +
drivers/tty/serial/sh-sci.c | 41 +++++++++++++++++++---
include/linux/serial_sci.h | 6 ----
4 files changed, 46 insertions(+), 10 deletions(-)
--
1.9.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
