synopsys designware 8250 uart driver · Supported

Maintainers

• M Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
• R Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Paths

• F drivers/tty/serial/8250/8250_dw.c
• F drivers/tty/serial/8250/8250_dwlib.*
• F drivers/tty/serial/8250/8250_lpss.c

Last 30 days

Recent patches

Most-recent 30 patches in this subsystem on linux-devicetree (capped at 30), ordered by date desc.

• STALE78d REVIEWED: 7 (7M) [PATCH v7 4/4] serial: 8250_dw: Use a fixed CPR value for UltraRISC DP1000 UART
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com>
• STALE78d [PATCH v7 2/4] serial: 8250_dw: build Renesas RZN1 CPR value from DW_UART_CPR_* definitions
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com>
• STALE78d REVIEWED: 7 (7M) [PATCH v7 1/4] serial: 8250_dwlib: move DesignWare register definitions to header
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com>
• STALE90d REVIEWED: 7 (7M) [PATCH v6 4/4] serial: 8250_dw: Use a fixed CPR value for UltraRISC DP1000 UART
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com>
• STALE90d REVIEWED: 7 (7M) [PATCH v6 1/4] serial: 8250_dwlib: move DesignWare register definitions to header
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com>
• STALE90d REVIEWED: 7 (7M) [PATCH v6 2/4] serial: 8250_dw: build Renesas RZN1 CPR value from DW_UART_CPR_* definitions
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com>
• STALE90d [PATCH v5 2/4] serial: 8250_dw: build Renesas RZN1 CPR value from DW_UART_CPR_* definitions
  2026-04-28 · Jia Wang <wangjia@ultrarisc.com>
• STALE90d [PATCH v5 4/4] serial: 8250_dw: Use a fixed CPR value for UltraRISC DP1000 UART
  2026-04-28 · Jia Wang <wangjia@ultrarisc.com>
• STALE90d [PATCH v5 1/4] serial: 8250_dwlib: move DesignWare register definitions to header
  2026-04-28 · Jia Wang <wangjia@ultrarisc.com>
• STALE92d [PATCH v4 4/4] serial: 8250_dw: Use a fixed CPR value for UltraRISC DP1000 UART
  2026-04-24 · Jia Wang <wangjia@ultrarisc.com>
• STALE92d [PATCH v4 2/4] serial: 8250_dw: build Renesas RZN1 CPR value from DW_UART_CPR_* definitions
  2026-04-24 · Jia Wang <wangjia@ultrarisc.com>
• STALE92d [PATCH v4 1/4] serial: 8250_dwlib: move DesignWare register definitions to header
  2026-04-24 · Jia Wang <wangjia@ultrarisc.com>
• STALE97d [PATCH v3 2/2] serial: 8250_dw: Use a fixed CPR value for UltraRISC DP1000 UART
  2026-04-21 · Jia Wang <wangjia@ultrarisc.com>
• STALE99d [PATCH v2 2/2] riscv: ultrarisc: 8250_dw: support DP1000 uart
  2026-03-16 · Jia Wang via B4 Relay <devnull+wangjia.ultrarisc.com@kernel.org>
• STALE642d LANDED: 14 (14M) [PATCH v3 3/3] serial: 8250_dw: Add Sophgo SG2044 quirk
  2024-10-24 · Inochi Amaoto <inochiama@gmail.com>
• STALE642d [PATCH v2 2/2] serial: 8250_dw: Add Sophgo SG2044 quirk
  2024-10-21 · Inochi Amaoto <inochiama@gmail.com>
• STALE655d [PATCH 2/2] serial: 8250_dw: Add Sophgo SG2044 quirk
  2024-10-09 · Inochi Amaoto <inochiama@gmail.com>
• STALE735d LANDED [PATCH v2 2/3] serial: 8250_dw: Use reset array API to get resets
  2024-06-04 · Hal Feng <hal.feng@starfivetech.com>
• STALE799d [PATCH v1 2/3] serial: 8250_dw: Use reset array API to get resets
  2024-05-17 · Hal Feng <hal.feng@starfivetech.com>
• STALE1016d [PATCH] serial: 8250_dw: Allow TX FIFO to drain before writing to UART_LCR An issue has been observed on the Broadcom BCM56160 serial port which appears closely related to a similar issue on the Marvell Armada 38x serial port.
  2023-10-16 · Richard Laing <hidden>
• STALE1036d [PATCH v2 08/11] serial: 8250_dw: Add Sophgo SG2042 support
  2023-09-20 · Chen Wang <hidden>
• STALE1040d [PATCH 10/12] serial: 8250_dw: Add Sophgo SG2042 support
  2023-09-15 · Wang Chen <hidden>
• STALE1072d LANDED [PATCH v2 2/2] serial: 8250_dw: fall back to poll if there's no interrupt
  2023-08-06 · Jisheng Zhang <jszhang@kernel.org>
• STALE1087d [PATCH 2/2] serial: 8250_dw: fall back to poll if there's no interrupt
  2023-08-02 · Jisheng Zhang <jszhang@kernel.org>
• STALE1579d [PATCH 2/4] serial: 8250_dw: Add MStar MSC313 quirk
  2022-03-24 · Daniel Palmer <hidden>
• STALE1685d LANDED: 3 (2M) [PATCH v4 14/16] serial: 8250_dw: Add StarFive JH7100 quirk
  2021-11-16 · Emil Renner Berthing <kernel@esmil.dk>
• STALE1709d [PATCH v3 14/16] serial: 8250_dw: Add StarFive JH7100 quirk
  2021-11-02 · Emil Renner Berthing <kernel@esmil.dk>
• STALE1733d [PATCH v2 14/16] serial: 8250_dw: Add skip_clk_set_rate quirk
  2021-10-21 · Emil Renner Berthing <kernel@esmil.dk>
• STALE1742d [PATCH v1 14/16] serial: 8250_dw: Add skip_clk_set_rate quirk
  2021-10-12 · Emil Renner Berthing <kernel@esmil.dk>
• STALE3527d REVIEWED: 7 (7M) [PATCH v6 2/2] DW DMAC: add multi-block property to device tree
  2016-11-25 · Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE90d REVIEWED: 7 (7M) [PATCH v6 2/4] serial: 8250_dw: build Renesas RZN1 CPR value from DW_UART_CPR_* definitions
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com> · 1 Reviewed-by
• STALE90d REVIEWED: 7 (7M) [PATCH v6 4/4] serial: 8250_dw: Use a fixed CPR value for UltraRISC DP1000 UART
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com> · 1 Reviewed-by
• STALE90d REVIEWED: 7 (7M) [PATCH v6 1/4] serial: 8250_dwlib: move DesignWare register definitions to header
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com> · 1 Reviewed-by
• STALE78d REVIEWED: 7 (7M) [PATCH v7 4/4] serial: 8250_dw: Use a fixed CPR value for UltraRISC DP1000 UART
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com> · 1 Reviewed-by
• STALE78d REVIEWED: 7 (7M) [PATCH v7 1/4] serial: 8250_dwlib: move DesignWare register definitions to header
  2026-04-29 · Jia Wang <wangjia@ultrarisc.com> · 1 Reviewed-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE92d [PATCH v4 4/4] serial: 8250_dw: Use a fixed CPR value for UltraRISC DP1000 UART
  2026-04-24 · Jia Wang <wangjia@ultrarisc.com>