tty: Cris has a nice RS485 ioctl so we should steal it
JP Tosoni observed:
"About a RS485 ioctl: could you consider the attached files which are
already in the Linux kernel (in include/asm-cris). They define a
TIOCSERSETRS485 (ioctl.h), and the data structure (rs485.h)
with allows to specify timings. Sounds just like what we want ?"
and he's right: sort of. Rework the structure to use flag bits and make the
time delay a fixed sized field so we don't get 32/64bit problems. Add the ioctls
to x86 so that people know what to add to their platform of choice.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/asm-x86/ioctls.h b/include/asm-x86/ioctls.h
index 3366035..1a8ac45 100644
--- a/include/asm-x86/ioctls.h
+++ b/include/asm-x86/ioctls.h
@@ -51,6 +51,8 @@
#define TCSETS2 _IOW('T', 0x2B, struct termios2)
#define TCSETSW2 _IOW('T', 0x2C, struct termios2)
#define TCSETSF2 _IOW('T', 0x2D, struct termios2)
+#define TIOCGRS485 0x542E
+#define TIOCSRS485 0x542F
#define TIOCGPTN _IOR('T', 0x30, unsigned int)
/* Get Pty Number (of pty-mux device) */
#define TIOCSPTLCK _IOW('T', 0x31, int) /* Lock/unlock Pty */