| From: |
| Jason Li <jason.lee651024-AT-gmail.com> |
| To: |
| jason.li-AT-cortina-access.com, Greg Kroah-Hartman <gregkh-AT-linuxfoundation.org>, Jiri Slaby <jirislaby-AT-kernel.org> |
| Subject: |
| [PATCH 0/3] tty: serial: Add Cortina-Access UART driver and platform support |
| Date: |
| Wed, 10 Jun 2026 19:28:17 +0800 |
| Message-ID: |
| <20260610112821.3030099-1-jason.li@cortina-access.com> |
| Cc: |
| Rob Herring <robh-AT-kernel.org>, Krzysztof Kozlowski <krzk+dt-AT-kernel.org>, Conor Dooley <conor+dt-AT-kernel.org>, Catalin Marinas <catalin.marinas-AT-arm.com>, Will Deacon <will-AT-kernel.org>, Arnd Bergmann <arnd-AT-arndb.de>, linux-serial-AT-vger.kernel.org, linux-arm-kernel-AT-lists.infradead.org, devicetree-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org |
| Archive-link: |
| Article |
Patch 1 adds the DT binding schema for the UART controller and the
top-level ARM board binding document for the Cortina-Access SoC family,
along with the vendor prefix.
Patch 2 introduces the serial driver (serial_cortina-access.c). The
UART IP has a simple FIFO-based design with a single interrupt line.
The driver uses uart_port_tx() for TX, handles earlycon initialisation
when the bootloader leaves the UART disabled, and provides a TX FIFO
kick-start in start_tx() to work around edge-triggered interrupt
behaviour. Clock frequency is obtained exclusively via the clk
framework.
Patch 3 adds the device tree sources for the CA8289 SoC and its
engineering board, covering the minimal hardware description needed to
boot a kernel with an INITRD rootfs.
Tested on CA8289 engineering board; console and earlycon both verified
at 115200 baud.
Any feedback or comments are highly appreciated.
Jason Li (3):
dt-bindings: serial: Add binding for Cortina-Access UART
tty: serial: Add UART driver for Cortina-Access platform
arm64: dts: cortina-access: Add DTS for CA8289 SoC and Venus board
.../bindings/arm/cortina-access.yaml | 29 +
.../serial/cortina-access,serial.yaml | 46 ++
.../devicetree/bindings/vendor-prefixes.yaml | 2 +
MAINTAINERS | 14 +
arch/arm64/Kconfig.platforms | 10 +
arch/arm64/boot/dts/Makefile | 1 +
arch/arm64/boot/dts/cortina-access/Makefile | 2 +
.../dts/cortina-access/ca8289-engboard.dts | 31 +
.../boot/dts/cortina-access/ca8289-soc.dtsi | 118 +++
drivers/tty/serial/Kconfig | 21 +
drivers/tty/serial/Makefile | 1 +
drivers/tty/serial/serial_cortina-access.c | 755 ++++++++++++++++++
12 files changed, 1030 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/cortina-access.yaml
create mode 100644 Documentation/devicetree/bindings/serial/cortina-access,serial.yaml
create mode 100644 arch/arm64/boot/dts/cortina-access/Makefile
create mode 100644 arch/arm64/boot/dts/cortina-access/ca8289-engboard.dts
create mode 100644 arch/arm64/boot/dts/cortina-access/ca8289-soc.dtsi
create mode 100644 drivers/tty/serial/serial_cortina-access.c
--
2.39.5
