Revert "serial: omap: fix software flow control"

commit a4f743851f74fc3e0cc40c13082e65c24139f481 upstream.

This reverts commit 957ee7270d632245b43f6feb0e70d9a5e9ea6cf6
(serial: omap: fix software flow control).

As Russell has pointed out, that commit isn't fixing
Software Flow Control at all, and it actually makes
it even more broken.

It was agreed to revert this commit and use Russell's
latest UART patches instead.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: Andreas Bießmann <andreas.devel@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h
index 3a5764494d474d42db16753eff37d0c33e9e11d9..1a52725ffcf25ca682f80c9d4004a0ce5411cfa4 100644 (file)
--- a/arch/arm/plat-omap/include/plat/omap-serial.h
+++ b/arch/arm/plat-omap/include/plat/omap-serial.h
@@ -42,10 +42,10 @@
 #define OMAP_UART_WER_MOD_WKUP 0X7F
 
 /* Enable XON/XOFF flow control on output */
-#define OMAP_UART_SW_TX                0x8
+#define OMAP_UART_SW_TX                0x04
 
 /* Enable XON/XOFF flow control on input */
-#define OMAP_UART_SW_RX                0x2
+#define OMAP_UART_SW_RX                0x04
 
 #define OMAP_UART_SYSC_RESET   0X07
 #define OMAP_UART_TCR_TRIG     0X0F

diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 22992cda572b9b2edd8fcac075485a1a33894e46..d3cda0cb2df0a9e2d7c4536c0d8638a9461abff7 100644 (file)
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -667,19 +667,19 @@ serial_omap_configure_xonxoff
 
        /*
         * IXON Flag:
-        * Flow control for OMAP.TX
-        * OMAP.RX should listen for XON/XOFF
+        * Enable XON/XOFF flow control on output.
+        * Transmit XON1, XOFF1
         */
        if (termios->c_iflag & IXON)
-               up->efr |= OMAP_UART_SW_RX;
+               up->efr |= OMAP_UART_SW_TX;
 
        /*
         * IXOFF Flag:
-        * Flow control for OMAP.RX
-        * OMAP.TX should send XON/XOFF
+        * Enable XON/XOFF flow control on input.
+        * Receiver compares XON1, XOFF1.
         */
        if (termios->c_iflag & IXOFF)
-               up->efr |= OMAP_UART_SW_TX;
+               up->efr |= OMAP_UART_SW_RX;
 
        serial_out(up, UART_EFR, up->efr | UART_EFR_ECB);
        serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);