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From: Binbin Zhou <zhoubinbin@loongson.cn>
To: Binbin Zhou <zhoubb.aaron@gmail.com>,
	Huacai Chen <chenhuacai@loongson.cn>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jiri Slaby <jirislaby@kernel.org>,
	Haowei Zheng <zhenghaowei@loongson.cn>
Cc: Huacai Chen <chenhuacai@kernel.org>,
	Xuerui Wang <kernel@xen0n.name>,
	loongarch@lists.linux.dev, devicetree@vger.kernel.org,
	linux-serial@vger.kernel.org,
	Binbin Zhou <zhoubinbin@loongson.cn>
Subject: [PATCH 0/3] serial: 8250: Add Loongson-2K0300 and Loongson-2K3000 UART support
Date: Wed,  4 Nov 2026 15:45:44 +0800	[thread overview]
Message-ID: <cover.1793776192.git.zhoubinbin@loongson.cn> (raw)

Hi all:

This series adds UART support for two Loongson SoCs.

The Loongson-2K0300 UART is the same as the one found on the
Loongson-2K1500, so it is documented as falling back to
"loongson,ls2k1500-uart" and then "ns16550a". No driver changes are
needed.

The Loongson-2K3000 UART differs from earlier Loongson UARTs in that it
does not require MCR/MSR signal inversion. It also supports a fractional
baud rate divisor. A dedicated compatible and driver data are added so
the driver can distinguish it.

Thanks.
Binbin

Binbin Zhou (3):
  dt-bindings: serial: 8250: Document Loongson-2K0300 UART compatible
  dt-bindings: serial: 8250: Add dedicated Loongson-2K3000 UART
    compatible
  serial: 8250_loongson: Add Loongson-2K3000 UART support

 Documentation/devicetree/bindings/serial/8250.yaml | 4 ++++
 drivers/tty/serial/8250/8250_loongson.c            | 7 +++++++
 2 files changed, 11 insertions(+)


base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
-- 
2.52.0


             reply	other threads:[~2026-11-04  7:46 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-04  7:45 Binbin Zhou [this message]
2026-11-04  7:45 ` [PATCH 1/3] dt-bindings: serial: 8250: Document Loongson-2K0300 UART compatible Binbin Zhou
2026-11-04  7:45 ` [PATCH 2/3] dt-bindings: serial: 8250: Add dedicated Loongson-2K3000 " Binbin Zhou
2026-11-04  7:52   ` sashiko-bot
2026-11-04  7:45 ` [PATCH 3/3] serial: 8250_loongson: Add Loongson-2K3000 UART support Binbin Zhou
2026-11-04  7:58 ` [PATCH 0/3] serial: 8250: Add Loongson-2K0300 and " Huacai Chen

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