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Subject[PATCH v2 0/2] tty: serial: add DT bindings and serial driver for the SiFive FU540 UART
This series adds a serial driver, with console support, for the
UART IP block present on the SiFive FU540 SoC. The programming
model is straightforward, but unique.

Boot-tested on a SiFive FU540 HiFive-U board (with appropriate patches
to the DT data).

The patches in this series can also be found at:

This second version fixes a few problems identified by the 0-day
build system, mostly focused around remnants relating to
CONFIG_CONSOLE_POLL, and a missing spin_unlock() in the ISR.

Paul Walmsley (2):
dt-bindings: serial: add documentation for the SiFive UART driver
tty: serial: add driver for the SiFive UART

.../bindings/serial/sifive-serial.txt | 21 +
drivers/tty/serial/Kconfig | 24 +
drivers/tty/serial/Makefile | 1 +
drivers/tty/serial/sifive.c | 1067 +++++++++++++++++
include/uapi/linux/serial_core.h | 3 +
5 files changed, 1116 insertions(+)
create mode 100644 Documentation/devicetree/bindings/serial/sifive-serial.txt
create mode 100644 drivers/tty/serial/sifive.c

Cc: Greg Kroah-Hartman <>
Cc: Jiri Slaby <>
Cc: Palmer Dabbelt <>
Cc: Wesley Terpstra <>


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