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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-10-09 21:33:03 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-10-09 21:33:03 +0100
commitb1add0480a95b6ceaece5caf6c50614771eae9b2 (patch)
tree06f969f37bd0f51d9ebcccdb3e3ae983edaad889 /arch/arm/mach-imx
parent3f30a09a612bac2b531a206c2a58a292dd7ff182 (diff)
parent58a85f465fb16a918a869eba05addb8f78d9e064 (diff)
Merge branch 'for-rmk' of git://pasiphae.extern.pengutronix.de/git/imx/linux-2.6.git
Merge branch 'imx-devel' into devel
Diffstat (limited to 'arch/arm/mach-imx')
-rw-r--r--arch/arm/mach-imx/include/mach/irqs.h5
-rw-r--r--arch/arm/mach-imx/irq.c32
2 files changed, 33 insertions, 4 deletions
diff --git a/arch/arm/mach-imx/include/mach/irqs.h b/arch/arm/mach-imx/include/mach/irqs.h
index eb8d5bd05d5..67812c5ac1f 100644
--- a/arch/arm/mach-imx/include/mach/irqs.h
+++ b/arch/arm/mach-imx/include/mach/irqs.h
@@ -111,6 +111,11 @@
/* decode irq number to use with IMR(x), ISR(x) and friends */
#define IRQ_TO_REG(irq) ((irq - IMX_IRQS) >> 5)
+/* all normal IRQs can be FIQs */
+#define FIQ_START 0
+/* switch betwean IRQ and FIQ */
+extern int imx_set_irq_fiq(unsigned int irq, unsigned int type);
+
#define NR_IRQS (IRQ_GPIOD(32) + 1)
#define IRQ_GPIO(x)
#endif
diff --git a/arch/arm/mach-imx/irq.c b/arch/arm/mach-imx/irq.c
index 232e3b9f880..531b95deadc 100644
--- a/arch/arm/mach-imx/irq.c
+++ b/arch/arm/mach-imx/irq.c
@@ -36,10 +36,7 @@
/*
*
* We simply use the ENABLE DISABLE registers inside of the IMX
- * to turn on/off specific interrupts. FIXME- We should
- * also add support for the accelerated interrupt controller
- * by putting offets to irq jump code in the appropriate
- * places.
+ * to turn on/off specific interrupts.
*
*/
@@ -102,6 +99,28 @@ imx_unmask_irq(unsigned int irq)
__raw_writel(irq, IMX_AITC_INTENNUM);
}
+#ifdef CONFIG_FIQ
+int imx_set_irq_fiq(unsigned int irq, unsigned int type)
+{
+ unsigned int irqt;
+
+ if (irq >= IMX_IRQS)
+ return -EINVAL;
+
+ if (irq < IMX_IRQS / 2) {
+ irqt = __raw_readl(IMX_AITC_INTTYPEL) & ~(1 << irq);
+ __raw_writel(irqt | (!!type << irq), IMX_AITC_INTTYPEL);
+ } else {
+ irq -= IMX_IRQS / 2;
+ irqt = __raw_readl(IMX_AITC_INTTYPEH) & ~(1 << irq);
+ __raw_writel(irqt | (!!type << irq), IMX_AITC_INTTYPEH);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(imx_set_irq_fiq);
+#endif /* CONFIG_FIQ */
+
static int
imx_gpio_irq_type(unsigned int _irq, unsigned int type)
{
@@ -284,4 +303,9 @@ imx_init_irq(void)
/* Release masking of interrupts according to priority */
__raw_writel(-1, IMX_AITC_NIMASK);
+
+#ifdef CONFIG_FIQ
+ /* Initialize FIQ */
+ init_FIQ();
+#endif
}