Messages in this thread | | | Date | Thu, 10 Nov 2011 11:11:22 +0900 | From | Tomoya MORINAGA <> | Subject | Re: [PATCH 2/2] pch_uart: Delete modem status interrupt enable code |
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Hi Alan,
(2011/11/02 20:00), Alan Cox wrote: >> Called ".get_mctrl" function, other software can know incoming carrier >> detection. >> Or you mean a uart driver must detect incoming carrier with interrupt ? > > If a user opens a tty port which has no carrier signal then the open is > supposed to block until the carrier is raised unless either clocal > termios or O_NDELAY open flags are set. > > That usually means you need to take the carrier raise interrupt in order > to wake out of open in this case. >
I understand. We need to add modem status interrupt processing.
Thanks, -- tomoya ROHM Co., Ltd.
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