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Subject[PATCH 3/9] serial/arc: Remove the workaround for legacy ISS
Date
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
drivers/tty/serial/arc_uart.c | 14 --------------
1 file changed, 14 deletions(-)

diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c
index 4d971281e3d9..a6da10f84293 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)
@@ -387,17 +386,6 @@ 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);
@@ -520,8 +508,6 @@ 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];
--
1.8.3.2


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