diff options
| author |   Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2013-01-10 11:25:05 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-15 23:02:59 -0800 |
| commit | 9660497c98e4b64e8646d7604480b40d8a0d413e (patch) | |
| tree | c24f344a43cf7032f6c996909fc4c85d8fa7cf33 /drivers/tty/serial/8250/8250.c | |
| parent | tty: Only wakeup the line discipline idle queue when queue is active (diff) | |
| download | linux-dev-9660497c98e4b64e8646d7604480b40d8a0d413e.tar.xz linux-dev-9660497c98e4b64e8646d7604480b40d8a0d413e.zip | |
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>
Diffstat (limited to 'drivers/tty/serial/8250/8250.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 0d771ec16750..e2ac25a037ef 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -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; |