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authorAlan Cox <alan@linux.intel.com>2010-10-18 14:38:02 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2010-10-22 13:20:10 -0400
commitaf7f3743567e3d5b40e2f9c21541b7f40b99c103 (patch)
treed5a8ef131861af6620d3a7947db167f2e0ebe1bf /drivers/serial/8250.c
parent4e4e66029af090c98cb10fafd13e8dd5039037a9 (diff)
serial: abstraction for 8250 legacy ports
Not every platform that has generic legacy 8250 ports manages to have them clocked the right way or without errata. Provide a generic interface to allow platforms to override the default behaviour in a manner that dumps the complexity in *their* code not the 8250 driver. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial/8250.c')
-rw-r--r--drivers/serial/8250.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 6994afb5571a..37f19a678c97 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2672,6 +2672,16 @@ static struct uart_ops serial8250_pops = {
2672 2672
2673static struct uart_8250_port serial8250_ports[UART_NR]; 2673static struct uart_8250_port serial8250_ports[UART_NR];
2674 2674
2675static void (*serial8250_isa_config)(int port, struct uart_port *up,
2676 unsigned short *capabilities);
2677
2678void serial8250_set_isa_configurator(
2679 void (*v)(int port, struct uart_port *up, unsigned short *capabilities))
2680{
2681 serial8250_isa_config = v;
2682}
2683EXPORT_SYMBOL(serial8250_set_isa_configurator);
2684
2675static void __init serial8250_isa_init_ports(void) 2685static void __init serial8250_isa_init_ports(void)
2676{ 2686{
2677 struct uart_8250_port *up; 2687 struct uart_8250_port *up;
@@ -2717,6 +2727,9 @@ static void __init serial8250_isa_init_ports(void)
2717 up->port.regshift = old_serial_port[i].iomem_reg_shift; 2727 up->port.regshift = old_serial_port[i].iomem_reg_shift;
2718 set_io_from_upio(&up->port); 2728 set_io_from_upio(&up->port);
2719 up->port.irqflags |= irqflag; 2729 up->port.irqflags |= irqflag;
2730 if (serial8250_isa_config != NULL)
2731 serial8250_isa_config(i, &up->port, &up->capabilities);
2732
2720 } 2733 }
2721} 2734}
2722 2735
@@ -3178,6 +3191,10 @@ int serial8250_register_port(struct uart_port *port)
3178 if (port->pm) 3191 if (port->pm)
3179 uart->port.pm = port->pm; 3192 uart->port.pm = port->pm;
3180 3193
3194 if (serial8250_isa_config != NULL)
3195 serial8250_isa_config(0, &uart->port,
3196 &uart->capabilities);
3197
3181 ret = uart_add_one_port(&serial8250_reg, &uart->port); 3198 ret = uart_add_one_port(&serial8250_reg, &uart->port);
3182 if (ret == 0) 3199 if (ret == 0)
3183 ret = uart->port.line; 3200 ret = uart->port.line;