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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 @@
1From 3f819713f3c7ccfd56146f4c007155bc47a170ac Mon Sep 17 00:00:00 2001
2From: Vikram Pandita <vikram.pandita@ti.com>
3Date: Mon, 22 Jun 2009 17:58:47 -0500
4Subject: [PATCH 4/8] serial: 8250: add IRQ trigger support
5
6There is currently no provision for passing IRQ trigger flags for
7serial IRQs with triggering requirements (such as GPIO IRQs)
8
9This patch adds irqflags to plat_serial8250_port that can be passed
10from board file to reqest_irq() of 8250 driver
11
12Changes are backward compatible with boards passing UPF_SHARE_IRQ flag
13
14Tested on Zoom2 board that has IRQF_TRIGGER_RISING requirement for 8250 irq
15
16Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
17---
18 drivers/serial/8250.c | 14 +++++++++-----
19 drivers/serial/8250.h | 1 +
20 include/linux/serial_8250.h | 1 +
21 include/linux/serial_core.h | 1 +
22 4 files changed, 12 insertions(+), 5 deletions(-)
23
24diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
25index 606fabb..6474fe4 100644
26--- a/drivers/serial/8250.c
27+++ b/drivers/serial/8250.c
28@@ -1681,7 +1681,7 @@ static int serial_link_irq_chain(struct uart_8250_port *up)
29 INIT_LIST_HEAD(&up->list);
30 i->head = &up->list;
31 spin_unlock_irq(&i->lock);
32-
33+ irq_flags |= up->port.irqflags;
34 ret = request_irq(up->port.irq, serial8250_interrupt,
35 irq_flags, "serial", i);
36 if (ret < 0)
37@@ -2030,7 +2030,7 @@ static int serial8250_startup(struct uart_port *port)
38 * allow register changes to become visible.
39 */
40 spin_lock_irqsave(&up->port.lock, flags);
41- if (up->port.flags & UPF_SHARE_IRQ)
42+ if (up->port.irqflags & IRQF_SHARED)
43 disable_irq_nosync(up->port.irq);
44
45 wait_for_xmitr(up, UART_LSR_THRE);
46@@ -2043,7 +2043,7 @@ static int serial8250_startup(struct uart_port *port)
47 iir = serial_in(up, UART_IIR);
48 serial_out(up, UART_IER, 0);
49
50- if (up->port.flags & UPF_SHARE_IRQ)
51+ if (up->port.irqflags & IRQF_SHARED)
52 enable_irq(up->port.irq);
53 spin_unlock_irqrestore(&up->port.lock, flags);
54
55@@ -2688,6 +2688,7 @@ static void __init serial8250_isa_init_ports(void)
56 i++, up++) {
57 up->port.iobase = old_serial_port[i].port;
58 up->port.irq = irq_canonicalize(old_serial_port[i].irq);
59+ up->port.irqflags = old_serial_port[i].irqflags;
60 up->port.uartclk = old_serial_port[i].baud_base * 16;
61 up->port.flags = old_serial_port[i].flags;
62 up->port.hub6 = old_serial_port[i].hub6;
63@@ -2696,7 +2697,7 @@ static void __init serial8250_isa_init_ports(void)
64 up->port.regshift = old_serial_port[i].iomem_reg_shift;
65 set_io_from_upio(&up->port);
66 if (share_irqs)
67- up->port.flags |= UPF_SHARE_IRQ;
68+ up->port.irqflags |= IRQF_SHARED;
69 }
70 }
71
72@@ -2886,6 +2887,7 @@ int __init early_serial_setup(struct uart_port *port)
73 p->iobase = port->iobase;
74 p->membase = port->membase;
75 p->irq = port->irq;
76+ p->irqflags = port->irqflags;
77 p->uartclk = port->uartclk;
78 p->fifosize = port->fifosize;
79 p->regshift = port->regshift;
80@@ -2959,6 +2961,7 @@ static int __devinit serial8250_probe(struct platform_device *dev)
81 port.iobase = p->iobase;
82 port.membase = p->membase;
83 port.irq = p->irq;
84+ port.irqflags = p->irqflags;
85 port.uartclk = p->uartclk;
86 port.regshift = p->regshift;
87 port.iotype = p->iotype;
88@@ -2971,7 +2974,7 @@ static int __devinit serial8250_probe(struct platform_device *dev)
89 port.serial_out = p->serial_out;
90 port.dev = &dev->dev;
91 if (share_irqs)
92- port.flags |= UPF_SHARE_IRQ;
93+ port.irqflags |= IRQF_SHARED;
94 ret = serial8250_register_port(&port);
95 if (ret < 0) {
96 dev_err(&dev->dev, "unable to register port at index %d "
97@@ -3113,6 +3116,7 @@ int serial8250_register_port(struct uart_port *port)
98 uart->port.iobase = port->iobase;
99 uart->port.membase = port->membase;
100 uart->port.irq = port->irq;
101+ uart->port.irqflags = port->irqflags;
102 uart->port.uartclk = port->uartclk;
103 uart->port.fifosize = port->fifosize;
104 uart->port.regshift = port->regshift;
105diff --git a/drivers/serial/8250.h b/drivers/serial/8250.h
106index 5202603..9b34b04 100644
107--- a/drivers/serial/8250.h
108+++ b/drivers/serial/8250.h
109@@ -20,6 +20,7 @@ struct old_serial_port {
110 unsigned int baud_base;
111 unsigned int port;
112 unsigned int irq;
113+ unsigned long irqflags;
114 unsigned int flags;
115 unsigned char hub6;
116 unsigned char io_type;
117diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
118index d4d2a78..fb46aba 100644
119--- a/include/linux/serial_8250.h
120+++ b/include/linux/serial_8250.h
121@@ -22,6 +22,7 @@ struct plat_serial8250_port {
122 void __iomem *membase; /* ioremap cookie or NULL */
123 resource_size_t mapbase; /* resource base */
124 unsigned int irq; /* interrupt number */
125+ unsigned long irqflags; /* request_irq flags */
126 unsigned int uartclk; /* UART clock rate */
127 void *private_data;
128 unsigned char regshift; /* register shift */
129diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
130index 23d2fb0..3cd255f 100644
131--- a/include/linux/serial_core.h
132+++ b/include/linux/serial_core.h
133@@ -265,6 +265,7 @@ struct uart_port {
134 unsigned int (*serial_in)(struct uart_port *, int);
135 void (*serial_out)(struct uart_port *, int, int);
136 unsigned int irq; /* irq number */
137+ unsigned long irqflags; /* irq flags */
138 unsigned int uartclk; /* base uart clock */
139 unsigned int fifosize; /* tx fifo size */
140 unsigned char x_char; /* xon/xoff char */
141--
1421.6.3.2
143
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-06-27 12:16:26 +0000