linux-kernel - [PATCH v3 0/2] usb: serial: add support for CH348

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Date:   Mon, 14 Nov 2022 07:37:34 +0000
From:   Corentin Labbe <clabbe@...libre.com>
To:     gregkh@...uxfoundation.org, johan@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH v3 0/2] usb: serial: add support for CH348

Hello

The CH348 is an octo serial to USB adapter.
The following patch adds a driver for supporting it.
Since there is no public datasheet, unfortunatly it remains some magic values.

It was tested with a large range of baud from 1200 to 1500000 and used with
success in one of our kernel CI testlab.

Regards

Changes since v1:
- use a data structure for encoding/decoding messages.
- check if needed endpoints exists
- fix URB leak in ch348_allocate_status_read error case
- test for maximum baud rate as stated by datasheet

Changes since v2:
- specify ch348_rxbuf data length
- Use correct speed_t dwDTERate instead of __le32
- test for maximum baud rate supported according to datasheet
- Use a define for CH348_TX_HDRSIZE

Corentin Labbe (2):
  usb: serial: add support for CH348
  usb: serial: add myself as maintainer of CH348

 MAINTAINERS                 |   5 +
 drivers/usb/serial/Kconfig  |   9 +
 drivers/usb/serial/Makefile |   1 +
 drivers/usb/serial/ch348.c  | 739 ++++++++++++++++++++++++++++++++++++
 4 files changed, 754 insertions(+)
 create mode 100644 drivers/usb/serial/ch348.c

-- 
2.37.4