From 5da6b1c079e6804a81e63ab8337224cbd2148c91 Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Tue, 1 Sep 2020 14:03:29 +0200 Subject: [PATCH] sc16is7xx: Set iobase to device index Some derivates of sc16is7xx devices expose more than one tty device to userspace. If multiple such devices exist in a system, userspace currently has no clean way to infer which tty maps to which physical line. Set the .iobase value to the relative index within the device to allow infering the order through sysfs. Signed-off-by: Daniel Mack Link: https://lore.kernel.org/r/20200901120329.4176302-1-daniel@zonque.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sc16is7xx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 809610b37c71..f86ec2d2635b 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -1271,6 +1271,7 @@ static int sc16is7xx_probe(struct device *dev, s->p[i].port.type = PORT_SC16IS7XX; s->p[i].port.fifosize = SC16IS7XX_FIFO_SIZE; s->p[i].port.flags = UPF_FIXED_TYPE | UPF_LOW_LATENCY; + s->p[i].port.iobase = i; s->p[i].port.iotype = UPIO_PORT; s->p[i].port.uartclk = freq; s->p[i].port.rs485_config = sc16is7xx_config_rs485;