This series adds ns16550 support for two PCIe serial adapters found on
market:

 - WCH (Nanjing Qinheng Microelectronics) CH382, available as
   CH382 2S [1c00:3253] and CH382 2S1P [1c00:3250].
 - ASIX AX99100 PCIe to Multi-I/O Controller [125b:9910].

Both chips expose 16550-compatible UARTs through PCI I/O BAR0 and
work with the existing ns16550 driver once a matching device table
entry and parameter set are added.

v4:
 - Add Reviewed-by from Stefano.

v3:
 - New patch 2/2: add support for ASIX AX99100.
 - Add forgotten Reviewed-by from Denis in patch 1/2 (WCH CH382).

v2:
 - Reorder entries in ns16550_config to keep them sorted by device ID.
 - Rename PCI_VENDOR_ID_WCH to PCI_VENDOR_ID_WCHIC as WCH has multiple
   vendor IDs.

Jiaqing Zhao (2):
  ns16550: add support for WCH CH382 serial adapters
  ns16550: add support for ASIX AX99100 PCIe Multi-I/O controller

 xen/drivers/char/ns16550.c | 38 ++++++++++++++++++++++++++++++++++++++
 xen/include/xen/pci_ids.h  |  4 ++++
 2 files changed, 42 insertions(+)

-- 
2.53.0

On 02.06.2026 07:34, Jiaqing Zhao wrote:
> This series adds ns16550 support for two PCIe serial adapters found on
> market:
> 
>  - WCH (Nanjing Qinheng Microelectronics) CH382, available as
>    CH382 2S [1c00:3253] and CH382 2S1P [1c00:3250].
>  - ASIX AX99100 PCIe to Multi-I/O Controller [125b:9910].
> 
> Both chips expose 16550-compatible UARTs through PCI I/O BAR0 and
> work with the existing ns16550 driver once a matching device table
> entry and parameter set are added.
> 
> v4:
>  - Add Reviewed-by from Stefano.

There's no need to re-submit just for this. Mail volume is already high
enough. The fact that this wasn't merged yet doesn't indicate any need
to re-submit: This series simply needs to wait until the tree re-opens
for the 4.23 dev cycle.

Jan