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author | Hui Wang <jason77.wang@gmail.com> | 2011-08-24 17:41:47 +0800 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-08-24 15:27:59 -0700 |
commit | 019dc9ea8d528eb3640bbba604e1e5a2f6994b1f (patch) | |
tree | 7acf8e0361af95ea8ab490a6cd2fff4f6a4ac5b9 /Documentation/serial | |
parent | 9a234349de01de3437784c0ef03d95353f055fae (diff) | |
download | linux-019dc9ea8d528eb3640bbba604e1e5a2f6994b1f.tar.bz2 |
serial/imx: support to handle break character
The imx UART hardware controller can identify BREAK character and the
imx_set_termios() can accept BRKINT set by users, but current existing
imx_rxint() can't pass BREAK character and TTY_BREAK to the tty layer
as other serial drivers do (8250.c omap_serial.c).
Here add code to handle BREAK character and pass it to tty layer.
To detect error occurrence, i use URXD_ERR to replace (URXD_OVRRUN |
URXD_FRMERR | ...) because any kind of error occurs, URXD_ERR will
always be set to 1.
I put the URXD_BRK to the first place to check since when BREAK error
occurs, not only URXD_BRK is set to 1, but also URXD_PRERR and
URXD_FRMERR are all set to 1. This arrangement can filter out fake
parity and frame errors when BREAK error occurs.
Signed-off-by: Hui Wang <jason77.wang@gmail.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/serial')
0 files changed, 0 insertions, 0 deletions