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>
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@ -1911,9 +1911,12 @@ static int serial8250_startup(struct uart_port *port)
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if (port->type == PORT_8250_CIR)
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return -ENODEV;
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port->fifosize = uart_config[up->port.type].fifo_size;
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up->tx_loadsz = uart_config[up->port.type].tx_loadsz;
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up->capabilities = uart_config[up->port.type].flags;
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if (!port->fifosize)
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port->fifosize = uart_config[port->type].fifo_size;
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if (!up->tx_loadsz)
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up->tx_loadsz = uart_config[port->type].tx_loadsz;
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if (!up->capabilities)
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up->capabilities = uart_config[port->type].flags;
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up->mcr = 0;
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if (port->iotype != up->cur_iotype)
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@ -2746,9 +2749,12 @@ static void
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serial8250_init_fixed_type_port(struct uart_8250_port *up, unsigned int type)
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{
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up->port.type = type;
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up->port.fifosize = uart_config[type].fifo_size;
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up->capabilities = uart_config[type].flags;
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up->tx_loadsz = uart_config[type].tx_loadsz;
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if (!up->port.fifosize)
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up->port.fifosize = uart_config[type].fifo_size;
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if (!up->tx_loadsz)
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up->tx_loadsz = uart_config[type].tx_loadsz;
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if (!up->capabilities)
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up->capabilities = uart_config[type].flags;
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}
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static void __init
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@ -3182,6 +3188,10 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
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uart->bugs = up->bugs;
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uart->port.mapbase = up->port.mapbase;
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uart->port.private_data = up->port.private_data;
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uart->port.fifosize = up->port.fifosize;
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uart->tx_loadsz = up->tx_loadsz;
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uart->capabilities = up->capabilities;
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if (up->port.dev)
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uart->port.dev = up->port.dev;
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