[PATCH v4 18/21] serial: omap: fix software flow control
From: Felipe Balbi <hidden>
Date: 2012-09-06 12:51:13
Also in:
linux-omap, linux-serial, lkml
Subsystem:
arm port, the rest, tty layer and serial drivers · Maintainers:
Russell King, Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
From: Vikram Pandita <redacted> Software flow control register bits were not defined correctly. Also clarify the IXON and IXOFF logic to reflect what userspace wants. Cc: stable at vger.kernel.org Tested-by: Shubhrajyoti D <redacted> Signed-off-by: Vikram Pandita <redacted> Signed-off-by: Shubhrajyoti D <redacted> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Felipe Balbi <redacted> --- arch/arm/plat-omap/include/plat/omap-serial.h | 4 ++-- drivers/tty/serial/omap-serial.c | 12 ++++++------ 2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h
index 90d2d74..a79ed8b 100644
--- 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 0x04 +#define OMAP_UART_SW_TX 0x8 /* Enable XON/XOFF flow control on input */ -#define OMAP_UART_SW_RX 0x04 +#define OMAP_UART_SW_RX 0x2 #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 6a58f4f..1ba1f43 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c@@ -617,19 +617,19 @@ serial_omap_configure_xonxoff /* * IXON Flag: - * Enable XON/XOFF flow control on output. - * Transmit XON1, XOFF1 + * Flow control for OMAP.TX + * OMAP.RX should listen for XON/XOFF */ if (termios->c_iflag & IXON) - up->efr |= OMAP_UART_SW_TX; + up->efr |= OMAP_UART_SW_RX; /* * IXOFF Flag: - * Enable XON/XOFF flow control on input. - * Receiver compares XON1, XOFF1. + * Flow control for OMAP.RX + * OMAP.TX should send XON/XOFF */ if (termios->c_iflag & IXOFF) - up->efr |= OMAP_UART_SW_RX; + up->efr |= OMAP_UART_SW_TX; serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);
--
1.7.12.rc3