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serial: 8250: Allow drivers to deliver capabilities 

Modern UARTs are able to provide information about their
capabilities such as FIFO size. This allows the drivers to
deliver this information to 8250.c when they are registering
ports.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Heikki Krogerus 2013-01-10 11:25:05 +02:00 committed by Greg Kroah-Hartman
parent bd5d7ce9af
commit 9660497c98
1 changed files with 16 additions and 6 deletions
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22
drivers/tty/serial/8250/8250.c
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@ -1911,9 +1911,12 @@ static int serial8250_startup(struct uart_port *port)
if (port->type == PORT_8250_CIR)
return -ENODEV;
port->fifosize = uart_config[up->port.type].fifo_size;
up->tx_loadsz = uart_config[up->port.type].tx_loadsz;
up->capabilities = uart_config[up->port.type].flags;
if (!port->fifosize)
port->fifosize = uart_config[port->type].fifo_size;
if (!up->tx_loadsz)
up->tx_loadsz = uart_config[port->type].tx_loadsz;
if (!up->capabilities)
up->capabilities = uart_config[port->type].flags;
up->mcr = 0;
if (port->iotype != up->cur_iotype)
@ -2746,9 +2749,12 @@ static void
serial8250_init_fixed_type_port(struct uart_8250_port *up, unsigned int type)
{
up->port.type = type;
up->port.fifosize = uart_config[type].fifo_size;
up->capabilities = uart_config[type].flags;
up->tx_loadsz = uart_config[type].tx_loadsz;
if (!up->port.fifosize)
up->port.fifosize = uart_config[type].fifo_size;
if (!up->tx_loadsz)
up->tx_loadsz = uart_config[type].tx_loadsz;
if (!up->capabilities)
up->capabilities = uart_config[type].flags;
}
static void __init
@ -3182,6 +3188,10 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
uart->bugs = up->bugs;
uart->port.mapbase = up->port.mapbase;
uart->port.private_data = up->port.private_data;
uart->port.fifosize = up->port.fifosize;
uart->tx_loadsz = up->tx_loadsz;
uart->capabilities = up->capabilities;
if (up->port.dev)
uart->port.dev = up->port.dev;