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-rw-r--r--meta/packages/linux/linux-omap3-pm-git/zoom2/0004-serial-8250-add-IRQ-trigger-support.patch143
1 files changed, 143 insertions, 0 deletions
diff --git a/meta/packages/linux/linux-omap3-pm-git/zoom2/0004-serial-8250-add-IRQ-trigger-support.patch b/meta/packages/linux/linux-omap3-pm-git/zoom2/0004-serial-8250-add-IRQ-trigger-support.patch
new file mode 100644
index 0000000000..05ca90512e
--- /dev/null
+++ b/meta/packages/linux/linux-omap3-pm-git/zoom2/0004-serial-8250-add-IRQ-trigger-support.patch
@@ -0,0 +1,143 @@
+From 3f819713f3c7ccfd56146f4c007155bc47a170ac Mon Sep 17 00:00:00 2001
+From: Vikram Pandita <vikram.pandita@ti.com>
+Date: Mon, 22 Jun 2009 17:58:47 -0500
+Subject: [PATCH 4/8] serial: 8250: add IRQ trigger support
+
+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
+
+Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
+---
+ drivers/serial/8250.c | 14 +++++++++-----
+ drivers/serial/8250.h | 1 +
+ include/linux/serial_8250.h | 1 +
+ include/linux/serial_core.h | 1 +
+ 4 files changed, 12 insertions(+), 5 deletions(-)
+
+diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
+index 606fabb..6474fe4 100644
+--- a/drivers/serial/8250.c
++++ b/drivers/serial/8250.c
+@@ -1681,7 +1681,7 @@ 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)
+@@ -2030,7 +2030,7 @@ 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);
+@@ -2043,7 +2043,7 @@ 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);
+
+@@ -2688,6 +2688,7 @@ 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;
+@@ -2696,7 +2697,7 @@ 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;
+ }
+ }
+
+@@ -2886,6 +2887,7 @@ 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;
+@@ -2959,6 +2961,7 @@ 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;
+@@ -2971,7 +2974,7 @@ 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 "
+@@ -3113,6 +3116,7 @@ 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;
+diff --git a/drivers/serial/8250.h b/drivers/serial/8250.h
+index 5202603..9b34b04 100644
+--- a/drivers/serial/8250.h
++++ b/drivers/serial/8250.h
+@@ -20,6 +20,7 @@ struct old_serial_port {
+ unsigned int baud_base;
+ unsigned int port;
+ unsigned int irq;
++ unsigned long irqflags;
+ unsigned int flags;
+ unsigned char hub6;
+ unsigned char io_type;
+diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
+index d4d2a78..fb46aba 100644
+--- a/include/linux/serial_8250.h
++++ b/include/linux/serial_8250.h
+@@ -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 */
+diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
+index 23d2fb0..3cd255f 100644
+--- a/include/linux/serial_core.h
++++ b/include/linux/serial_core.h
+@@ -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 */
+--
+1.6.3.2
+