[PATCH] mxs: icoll: Add function to register an interrupt as FIQ source

From: Maxime Ripard
Date: Mon Apr 29 2013 - 10:04:56 EST


MXS, unlike other ARM platforms, has no way to make a FIQ from an
interrupt from a driver, without poking directly into the icoll.

Add an exported function to do this.

Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-mxs/icoll.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/arch/arm/mach-mxs/icoll.c b/arch/arm/mach-mxs/icoll.c
index 8fb23af..1bb16da 100644
--- a/arch/arm/mach-mxs/icoll.c
+++ b/arch/arm/mach-mxs/icoll.c
@@ -16,6 +16,7 @@
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

+#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
@@ -34,6 +35,7 @@
#define HW_ICOLL_INTERRUPTn_SET(n) (0x0124 + (n) * 0x10)
#define HW_ICOLL_INTERRUPTn_CLR(n) (0x0128 + (n) * 0x10)
#define BM_ICOLL_INTERRUPTn_ENABLE 0x00000004
+#define BM_ICOLL_INTERRUPTn_FIQ_ENABLE 0x00000010
#define BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 0x1

#define ICOLL_NUM_IRQS 128
@@ -41,6 +43,15 @@
static void __iomem *icoll_base = MXS_IO_ADDRESS(MXS_ICOLL_BASE_ADDR);
static struct irq_domain *icoll_domain;

+void mxs_icoll_set_irq_fiq(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+
+ __raw_writel(BM_ICOLL_INTERRUPTn_FIQ_ENABLE,
+ icoll_base + HW_ICOLL_INTERRUPTn_SET(d->hwirq));
+}
+EXPORT_SYMBOL(mxs_icoll_set_irq_fiq);
+
static void icoll_ack_irq(struct irq_data *d)
{
/*
--
1.8.1.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/