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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>
This commit is contained in:
Vineet Gupta 2014-06-24 13:55:08 +05:30 committed by Greg Kroah-Hartman
parent 12d15e6f63
commit 5a56d59e85
1 changed files with 0 additions and 14 deletions
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14
drivers/tty/serial/arc_uart.c
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@ -102,7 +102,6 @@
struct arc_uart_port { struct arc_uart_port {
struct uart_port port; struct uart_port port;
unsigned long baud; 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) #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; uartl = hw_val & 0xFF;
uarth = (hw_val >> 8) & 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); spin_lock_irqsave(&port->lock, flags);
UART_ALL_IRQ_DISABLE(port); UART_ALL_IRQ_DISABLE(port);
@ -512,8 +500,6 @@ arc_uart_init_one(struct platform_device *pdev, int dev_id)
if (!plat_data) if (!plat_data)
return -ENODEV; return -ENODEV;
uart->is_emulated = !!plat_data[0]; /* workaround ISS bug */
if (is_early_platform_device(pdev)) { if (is_early_platform_device(pdev)) {
port->uartclk = plat_data[1]; port->uartclk = plat_data[1];
uart->baud = plat_data[2]; uart->baud = plat_data[2];