diff options
Diffstat (limited to 'drivers/tty/serial/8250')
| -rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 3 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_dwlib.c | 6 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 4 |
3 files changed, 8 insertions, 5 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 914e0e6251bf..3449f8790e46 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -497,6 +497,7 @@ static struct uart_8250_port *serial8250_setup_port(int index) up = &serial8250_ports[index]; up->port.line = index; + up->port.port_id = index; serial8250_init_port(up); if (!base_ops) @@ -1040,6 +1041,7 @@ int serial8250_register_8250_port(const struct uart_8250_port *up) uart_remove_one_port(&serial8250_reg, &uart->port); uart->port.ctrl_id = up->port.ctrl_id; + uart->port.port_id = up->port.port_id; uart->port.iobase = up->port.iobase; uart->port.membase = up->port.membase; uart->port.irq = up->port.irq; @@ -1202,6 +1204,7 @@ void serial8250_unregister_port(int line) uart->port.flags &= ~UPF_BOOT_AUTOCONF; uart->port.type = PORT_UNKNOWN; uart->port.dev = &serial8250_isa_devs->dev; + uart->port.port_id = line; uart->capabilities = 0; serial8250_init_port(uart); serial8250_apply_quirks(uart); diff --git a/drivers/tty/serial/8250/8250_dwlib.c b/drivers/tty/serial/8250/8250_dwlib.c index 75f32f054ebb..84843e204a5e 100644 --- a/drivers/tty/serial/8250/8250_dwlib.c +++ b/drivers/tty/serial/8250/8250_dwlib.c @@ -244,7 +244,7 @@ void dw8250_setup_port(struct uart_port *p) struct dw8250_port_data *pd = p->private_data; struct dw8250_data *data = to_dw8250_data(pd); struct uart_8250_port *up = up_to_u8250p(p); - u32 reg; + u32 reg, old_dlf; pd->hw_rs485_support = dw8250_detect_rs485_hw(p); if (pd->hw_rs485_support) { @@ -270,9 +270,11 @@ void dw8250_setup_port(struct uart_port *p) dev_dbg(p->dev, "Designware UART version %c.%c%c\n", (reg >> 24) & 0xff, (reg >> 16) & 0xff, (reg >> 8) & 0xff); + /* Preserve value written by firmware or bootloader */ + old_dlf = dw8250_readl_ext(p, DW_UART_DLF); dw8250_writel_ext(p, DW_UART_DLF, ~0U); reg = dw8250_readl_ext(p, DW_UART_DLF); - dw8250_writel_ext(p, DW_UART_DLF, 0); + dw8250_writel_ext(p, DW_UART_DLF, old_dlf); if (reg) { pd->dlf_size = fls(reg); diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 16aeb1420137..483bb552cdc4 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -703,9 +703,6 @@ static void serial8250_set_sleep(struct uart_8250_port *p, int sleep) static void serial8250_clear_IER(struct uart_8250_port *up) { - /* Port locked to synchronize UART_IER access against the console. */ - lockdep_assert_held_once(&up->port.lock); - if (up->capabilities & UART_CAP_UUE) serial_out(up, UART_IER, UART_IER_UUE); else @@ -3278,6 +3275,7 @@ void serial8250_init_port(struct uart_8250_port *up) spin_lock_init(&port->lock); port->ctrl_id = 0; + port->pm = NULL; port->ops = &serial8250_pops; port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE); |