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Commit c7213fc4 authored by Jesper Nilsson's avatar Jesper Nilsson
Browse files

CRIS: Fix RS485 delay handling. 



Very recently, the RS485 interface has been fixed by adding two further
fields (see commit 1b633184).

Check the value of the flag SER_RS485_RTS_BEFORE_SEND before delaying.

Signed-off-by: default avatarClaudio Scordino <claudio@evidence.eu.com>
Signed-off-by: default avatarJesper Nilsson <jesper.nilsson@axis.com>
parent 94479c01

drivers/serial/crisv10.c

+14 −7
Original line number Diff line number Diff line
@@ -1411,11 +1411,12 @@ e100_enable_rs485(struct tty_struct *tty, struct serial_rs485 *r) 
		       CONFIG_ETRAX_RS485_LTC1387_RXEN_PORT_G_BIT, 1);

#endif



	info->rs485.flags = r->flags;

	if (r->delay_rts_before_send >= 1000)

	info->rs485 = *r;



	/* Maximum delay before RTS equal to 1000 */

	if (info->rs485.delay_rts_before_send >= 1000)

		info->rs485.delay_rts_before_send = 1000;

	else

		info->rs485.delay_rts_before_send = r->delay_rts_before_send;



/*	printk("rts: on send = %i, after = %i, enabled = %i",

		    info->rs485.rts_on_send,

		    info->rs485.rts_after_sent,
@@ -3234,8 +3235,8 @@ rs_write(struct tty_struct *tty, 
		e100_disable_rx(info);

		e100_enable_rx_irq(info);

#endif



		if (info->rs485.delay_rts_before_send > 0)

		if ((info->rs485.flags & SER_RS485_RTS_BEFORE_SEND) &&

			(info->rs485.delay_rts_before_send > 0))

				msleep(info->rs485.delay_rts_before_send);

	}

#endif /* CONFIG_ETRAX_RS485 */
@@ -3694,6 +3695,11 @@ rs_ioctl(struct tty_struct *tty, struct file * file, 


		rs485data.delay_rts_before_send = rs485ctrl.delay_rts_before_send;

		rs485data.flags = 0;

		if (rs485data.delay_rts_before_send != 0)

			rs485data.flags |= SER_RS485_RTS_BEFORE_SEND;

		else

			rs485data.flags &= ~(SER_RS485_RTS_BEFORE_SEND);



		if (rs485ctrl.enabled)

			rs485data.flags |= SER_RS485_ENABLED;

		else
@@ -4527,6 +4533,7 @@ static int __init rs_init(void) 
		/* Set sane defaults */

		info->rs485.flags &= ~(SER_RS485_RTS_ON_SEND);

		info->rs485.flags |= SER_RS485_RTS_AFTER_SEND;

		info->rs485.flags &= ~(SER_RS485_RTS_BEFORE_SEND);

		info->rs485.delay_rts_before_send = 0;

		info->rs485.flags &= ~(SER_RS485_ENABLED);

#endif