ramips: add a baurate hack

When talking to an atmel controller we need 9600 or 250000 baud.
as 250000 does not exist we use 2500000.

Signed-off-by: John Crispin <blogic@openwrt.org>
Backport of r47204

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@47228 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ramips/patches-3.18/999-baud_250000.patch b/target/linux/ramips/patches-3.18/999-baud_250000.patch
new file mode 100644 (file)
index 0000000..eebe31c
--- /dev/null
+++ b/target/linux/ramips/patches-3.18/999-baud_250000.patch
@@ -0,0 +1,12 @@
+--- a/drivers/tty/serial/serial_core.c
++++ b/drivers/tty/serial/serial_core.c
+@@ -356,6 +356,9 @@
+       else if (flags == UPF_SPD_WARP)
+               altbaud = 460800;
+ 
++      if (tty_termios_baud_rate(termios) == 2500000)
++              return 250000;
++
+       for (try = 0; try < 2; try++) {
+               baud = tty_termios_baud_rate(termios);
+