Messages in this thread | | | Date | Thu, 12 Jan 2012 11:49:13 +0000 | From | Alan Cox <> | Subject | Re: tty/serial: Need clarification on Support for 4+M Baudrate |
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On Thu, 12 Jan 2012 10:49:38 +0100 Rajanikanth H V <rajanikanth.hv@stericsson.com> wrote:
> Alan, > > Thanks for your response, suggested modification helped to get 4.8M baud > but not 4.05M as this is being approximated to 4.0M baud which happens in > tty_termios_encode_baud_rate(...).
Only if you don't have the BOTHER flag set and only for returned data to user space.
When you do a TCSETS2 ioctl and have BOTHER set as the rate as well as a c_ispeed/c_ospeed the exactly value is given to the driver.
Alan
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