Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/arch/arm/plat-orion/irq.c b/arch/arm/plat-orion/irq.c
new file mode 100644
index 000000000..5b63b28b0
--- /dev/null
+++ b/arch/arm/plat-orion/irq.c
@@ -0,0 +1,39 @@
+/*
+ * arch/arm/plat-orion/irq.c
+ *
+ * Marvell Orion SoC IRQ handling.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <asm/exception.h>
+#include <plat/irq.h>
+#include <plat/orion-gpio.h>
+
+void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr)
+{
+	struct irq_chip_generic *gc;
+	struct irq_chip_type *ct;
+
+	/*
+	 * Mask all interrupts initially.
+	 */
+	writel(0, maskaddr);
+
+	gc = irq_alloc_generic_chip("orion_irq", 1, irq_start, maskaddr,
+				    handle_level_irq);
+	ct = gc->chip_types;
+	ct->chip.irq_mask = irq_gc_mask_clr_bit;
+	ct->chip.irq_unmask = irq_gc_mask_set_bit;
+	irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_MASK_CACHE,
+			       IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
+}