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Commit 1863178b authored by Shubhrajyoti Datta's avatar Shubhrajyoti Datta Committed by Greg Kroah-Hartman
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serial: uartps: Add support for cts-override 



Having flow is configurable. Add support for the same by
checking for cts-override.

Signed-off-by: default avatarShubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b1072b4f

drivers/tty/serial/xilinx_uartps.c

+12 −0
Original line number Diff line number Diff line
@@ -193,6 +193,7 @@ struct cdns_uart { 
	int			id;

	struct notifier_block	clk_rate_change_nb;

	u32			quirks;

	bool cts_override;

};

struct cdns_platform_data {

	u32 quirks;
@@ -1000,6 +1001,11 @@ static void cdns_uart_config_port(struct uart_port *port, int flags) 
 */

static unsigned int cdns_uart_get_mctrl(struct uart_port *port)

{

	struct cdns_uart *cdns_uart_data = port->private_data;



	if (cdns_uart_data->cts_override)

		return 0;



	return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;

}
@@ -1007,6 +1013,10 @@ static void cdns_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) 
{

	u32 val;

	u32 mode_reg;

	struct cdns_uart *cdns_uart_data = port->private_data;



	if (cdns_uart_data->cts_override)

		return;



	val = readl(port->membase + CDNS_UART_MODEMCR);

	mode_reg = readl(port->membase + CDNS_UART_MR);
@@ -1665,6 +1675,8 @@ static int cdns_uart_probe(struct platform_device *pdev) 
		console_port = NULL;

#endif



	cdns_uart_data->cts_override = of_property_read_bool(pdev->dev.of_node,

							     "cts-override");

	return 0;



err_out_pm_disable: