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authorVineet Gupta <Vineet.Gupta1@synopsys.com>2014-06-24 12:25:08 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-07-11 02:43:27 +0400
commit5a56d59e853b3dcd97e9497c1c7d3834b24f0664 (patch)
tree6d02533a10b69452b7278c406be376f1ba0c9a06 /drivers/tty/serial/arc_uart.c
parent12d15e6f6377fe46b1f9dc51133890a732f1ae05 (diff)
downloadlinux-5a56d59e853b3dcd97e9497c1c7d3834b24f0664.tar.xz
serial/arc: Remove the workaround for legacy ISS
Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/arc_uart.c')
-rw-r--r--drivers/tty/serial/arc_uart.c14
1 files changed, 0 insertions, 14 deletions
diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c
index b58544de4e86..ea954c3be18b 100644
--- a/drivers/tty/serial/arc_uart.c
+++ b/drivers/tty/serial/arc_uart.c
@@ -102,7 +102,6 @@
struct arc_uart_port {
struct uart_port port;
unsigned long baud;
- int is_emulated; /* H/w vs. Instruction Set Simulator */
};
#define to_arc_port(uport) container_of(uport, struct arc_uart_port, port)
@@ -380,17 +379,6 @@ arc_serial_set_termios(struct uart_port *port, struct ktermios *new,
uartl = hw_val & 0xFF;
uarth = (hw_val >> 8) & 0xFF;
- /*
- * UART ISS(Instruction Set simulator) emulation has a subtle bug:
- * A existing value of Baudh = 0 is used as a indication to startup
- * it's internal state machine.
- * Thus if baudh is set to 0, 2 times, it chokes.
- * This happens with BAUD=115200 and the formaula above
- * Until that is fixed, when running on ISS, we will set baudh to !0
- */
- if (uart->is_emulated)
- uarth = 1;
-
spin_lock_irqsave(&port->lock, flags);
UART_ALL_IRQ_DISABLE(port);
@@ -512,8 +500,6 @@ arc_uart_init_one(struct platform_device *pdev, int dev_id)
if (!plat_data)
return -ENODEV;
- uart->is_emulated = !!plat_data[0]; /* workaround ISS bug */
-
if (is_early_platform_device(pdev)) {
port->uartclk = plat_data[1];
uart->baud = plat_data[2];