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[v3,0/2] usb: serial: add support for CH348

Message ID 20221114073736.672194-1-clabbe@baylibre.com
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Series usb: serial: add support for CH348 | expand

Message

Corentin Labbe Nov. 14, 2022, 7:37 a.m. UTC 
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