sh: extend INTC with force_disable

Extend the shared INTC code with force_disable support to
allow keeping mask bits statically disabled. Needed for
SDHI support to mask out unsupported interrupt sources.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

drivers/sh/intc.c

@@ -851,6 +851,9 @@ void __init register_intc_controller(struct intc_desc *desc)
 		d->chip.mask_ack = intc_mask_ack;
 	}
 
+	/* disable bits matching force_disable before registering irqs */
+	if (desc->force_disable)
+		intc_enable_disable_enum(desc, d, desc->force_disable, 0);
 
 	/* disable bits matching force_enable before registering irqs */
 	if (desc->force_enable)

include/linux/sh_intc.h

@@ -72,6 +72,7 @@ struct intc_hw_desc {
 struct intc_desc {
 	char *name;
 	intc_enum force_enable;
+	intc_enum force_disable;
 	struct intc_hw_desc hw;
 };