From: Vineet Gupta Date: Tue, 24 Jun 2014 08:25:08 +0000 (+0530) Subject: serial/arc: Remove the workaround for legacy ISS X-Git-Tag: firefly_0821_release~176^2~3490^2~63 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5a56d59e853b3dcd97e9497c1c7d3834b24f0664;p=firefly-linux-kernel-4.4.55.git serial/arc: Remove the workaround for legacy ISS Signed-off-by: Vineet Gupta Reviewed-by: Rob Herring Signed-off-by: Greg Kroah-Hartman --- 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];