[greybus-dev] Re: [PATCH v2] staging: greybus: uart: clear unsupported c_cflag bits in set_termios

On Mon, Apr 27, 2026 at 10:24:46AM +0530, Debjeet Banerjee wrote:

gb_tty_set_termios() derives UART line configuration from a subset of termios->c_cflag bits (CSIZE, CSTOPB, PARENB, PARODD, CMSPAR, CRTSCTS, CLOCAL and CBAUD). Other bits are not interpreted by the driver and are not represented in the Greybus UART protocol.

Mask unsupported c_cflag bits so that userspace-visible termios reflects the supported bits implemented by the driver.

This addresses the existing FIXME.

Signed-off-by: Debjeet Banerjee debjeetbanerjee48@gmail.com

v2:

• Clear unsupported c_cflag bits as suggested
• Update comment to mention the change

Has this been tested? If not, I'd prefer to leave this as-is until it can be.

thanks,

greg k-h