Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-26 21:02:19 +00:00
Code Issues Packages Projects Releases Wiki Activity

serial: 8250: add IRQ trigger support

Browse Source 
There is currently no provision for passing IRQ trigger flags for
serial IRQs with triggering requirements (such as GPIO IRQs)

This patch adds irqflags to plat_serial8250_port that can be passed
from board file to reqest_irq() of 8250 driver

Changes are backward compatible with boards passing UPF_SHARE_IRQ flag

Tested on Zoom2 board that has IRQF_TRIGGER_RISING requirement for 8250 irq

[Moved new flag to end to fix bugs in the original with the old_serial array
	-- Alan]

Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Vikram Pandita 2009-09-19 13:13:19 -07:00 committed by Live-CD User
parent 1e066d803a
commit 1c2f04937b
4 changed files with 12 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/serial/8250.c
View File

@ -1677,7 +1677,7 @@ static int serial_link_irq_chain(struct uart_8250_port *up)
INIT_LIST_HEAD(&up->list);
i->head = &up->list;
spin_unlock_irq(&i->lock);
irq_flags |= up->port.irqflags;
ret = request_irq(up->port.irq, serial8250_interrupt,
irq_flags, "serial", i);
if (ret < 0)
@ -2026,7 +2026,7 @@ static int serial8250_startup(struct uart_port *port)
* allow register changes to become visible.
*/
spin_lock_irqsave(&up->port.lock, flags);
if (up->port.flags & UPF_SHARE_IRQ)
if (up->port.irqflags & IRQF_SHARED)
disable_irq_nosync(up->port.irq);
wait_for_xmitr(up, UART_LSR_THRE);
@ -2039,7 +2039,7 @@ static int serial8250_startup(struct uart_port *port)
iir = serial_in(up, UART_IIR);
serial_out(up, UART_IER, 0);
if (up->port.flags & UPF_SHARE_IRQ)
if (up->port.irqflags & IRQF_SHARED)
enable_irq(up->port.irq);
spin_unlock_irqrestore(&up->port.lock, flags);
@ -2671,6 +2671,7 @@ static void __init serial8250_isa_init_ports(void)
i++, up++) {
up->port.iobase = old_serial_port[i].port;
up->port.irq = irq_canonicalize(old_serial_port[i].irq);
up->port.irqflags = old_serial_port[i].irqflags;
up->port.uartclk = old_serial_port[i].baud_base * 16;
up->port.flags = old_serial_port[i].flags;
up->port.hub6 = old_serial_port[i].hub6;
@ -2679,7 +2680,7 @@ static void __init serial8250_isa_init_ports(void)
up->port.regshift = old_serial_port[i].iomem_reg_shift;
set_io_from_upio(&up->port);
if (share_irqs)
up->port.flags |= UPF_SHARE_IRQ;
up->port.irqflags |= IRQF_SHARED;
}
}
@ -2869,6 +2870,7 @@ int __init early_serial_setup(struct uart_port *port)
p->iobase = port->iobase;
p->membase = port->membase;
p->irq = port->irq;
p->irqflags = port->irqflags;
p->uartclk = port->uartclk;
p->fifosize = port->fifosize;
p->regshift = port->regshift;
@ -2942,6 +2944,7 @@ static int __devinit serial8250_probe(struct platform_device *dev)
port.iobase = p->iobase;
port.membase = p->membase;
port.irq = p->irq;
port.irqflags = p->irqflags;
port.uartclk = p->uartclk;
port.regshift = p->regshift;
port.iotype = p->iotype;
@ -2954,7 +2957,7 @@ static int __devinit serial8250_probe(struct platform_device *dev)
port.serial_out = p->serial_out;
port.dev = &dev->dev;
if (share_irqs)
port.flags |= UPF_SHARE_IRQ;
port.irqflags |= IRQF_SHARED;
ret = serial8250_register_port(&port);
if (ret < 0) {
dev_err(&dev->dev, "unable to register port at index %d "
@ -3096,6 +3099,7 @@ int serial8250_register_port(struct uart_port *port)
uart->port.iobase = port->iobase;
uart->port.membase = port->membase;
uart->port.irq = port->irq;
uart->port.irqflags = port->irqflags;
uart->port.uartclk = port->uartclk;
uart->port.fifosize = port->fifosize;
uart->port.regshift = port->regshift;

1
drivers/serial/8250.h
View File

@ -25,6 +25,7 @@ struct old_serial_port {
unsigned char io_type;
unsigned char *iomem_base;
unsigned short iomem_reg_shift;
unsigned long irqflags;
};
/*

1
include/linux/serial_8250.h
View File

@ -22,6 +22,7 @@ struct plat_serial8250_port {
void __iomem *membase; /* ioremap cookie or NULL */
resource_size_t mapbase; /* resource base */
unsigned int irq; /* interrupt number */
unsigned long irqflags; /* request_irq flags */
unsigned int uartclk; /* UART clock rate */
void *private_data;
unsigned char regshift; /* register shift */

1
include/linux/serial_core.h
View File

@ -265,6 +265,7 @@ struct uart_port {
unsigned int (*serial_in)(struct uart_port *, int);
void (*serial_out)(struct uart_port *, int, int);
unsigned int irq; /* irq number */
unsigned long irqflags; /* irq flags */
unsigned int uartclk; /* base uart clock */
unsigned int fifosize; /* tx fifo size */
unsigned char x_char; /* xon/xoff char */