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Commit 5a56d59e authored by Vineet Gupta's avatar Vineet Gupta Committed by Greg Kroah-Hartman
Browse files

serial/arc: Remove the workaround for legacy ISS 



Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 12d15e6f

drivers/tty/serial/arc_uart.c

+0 −14
Original line number Original line Diff line number Diff line
@@ -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];