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Ts'o" To: Muni Sekhar Cc: linux-serial , linux-kernel@vger.kernel.org Subject: Re: serial: custom baud rate Message-ID: <20180503175401.GD29205@thunk.org> Mail-Followup-To: "Theodore Y. Ts'o" , Muni Sekhar , linux-serial , linux-kernel@vger.kernel.org References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.5 (2018-04-13) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on imap.thunk.org); SAEximRunCond expanded to false Sender: linux-serial-owner@vger.kernel.org X-Mailing-List: linux-serial@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Thu, May 03, 2018 at 06:09:13PM +0530, Muni Sekhar wrote: > Hi All, > > From include/asm-generic/termbits.h , I see baudrate can be one of the > standard values: 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, > 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 500000, > 576000, 921600, 1000000, 1152000, 1500000, 2000000, 2500000, 3000000, > 3500000, 4000000. > > If I need to set a custom baud rates(e.g. 14400, 128000, 256000), does > Linux serial framework has any supporting method? See the setserial man page:t https://linux.die.net/man/8/setserial Not all serial devices support the spd_cust and divisor, however. In general, only devices where the kernel directly programs the 8250/16450/16550 UART directly will support this feature. - Ted