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serial: 8250: add /dev/ttySx when uart is enable

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before the patch:
ls /dev/ttyS
ttyS0 ttyS1 ttyS2 ttyS3 ttyS4 ttyS5  ttyS6 ttyS7

after the patch:
ls /dev/ttyS
ttyS3  ttyS4  ttyS6

Change-Id: I844523408751cb579bbfb50fafb7923d5c2cafdf
Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>
This commit is contained in:
Huibin Hong 2018-11-05 15:56:03 +08:00 committed by Tao Huang
parent 987c3373f8
commit f7382476af
1 changed files with 5 additions and 1 deletions
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6
drivers/tty/serial/8250/8250_core.c
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@ -558,6 +558,7 @@ static void __init serial8250_isa_init_ports(void)
static void __init
serial8250_register_ports(struct uart_driver *drv, struct device *dev)
{
#ifndef CONFIG_ARCH_ROCKCHIP
int i;
for (i = 0; i < nr_uarts; i++) {
@ -574,6 +575,7 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev)
serial8250_apply_quirks(up);
uart_add_one_port(drv, &up->port);
}
#endif
}
#ifdef CONFIG_SERIAL_8250_CONSOLE
@ -1019,7 +1021,9 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
uart->rs485_start_tx = up->rs485_start_tx;
uart->rs485_stop_tx = up->rs485_stop_tx;
uart->dma = up->dma;
#ifdef CONFIG_ARCH_ROCKCHIP
uart->port.line = up->port.line;
#endif
/* Take tx_loadsz from fifosize if it wasn't set separately */
if (uart->port.fifosize && !uart->tx_loadsz)
uart->tx_loadsz = uart->port.fifosize;