[POWERPC] Adapt ipic driver to new host_ops interface, add set_irq_type to set IRQ sense

This converts ipic code to Benh's IRQ mods.  For the IPIC, IRQ sense values in the device tree equal those in include/linux/irq.h; that's 8 for low assertion (most internal IRQs on mpc83xx), and 2 for high-to-low change.

spinlocks added to [un]mask, ack operations; default handler and type now set in host_map; and redundant condition check eliminated.
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/sysdev/ipic.h

@@ -15,7 +15,18 @@
 
 #include <asm/ipic.h>
 
-#define MPC83xx_IPIC_SIZE	(0x00100)
+#define NR_IPIC_INTS 128
+
+/* External IRQS */
+#define IPIC_IRQ_EXT0 48
+#define IPIC_IRQ_EXT1 17
+#define IPIC_IRQ_EXT7 23
+
+/* Default Priority Registers */
+#define IPIC_SIPRR_A_DEFAULT 0x05309770
+#define IPIC_SIPRR_D_DEFAULT 0x05309770
+#define IPIC_SMPRR_A_DEFAULT 0x05309770
+#define IPIC_SMPRR_B_DEFAULT 0x05309770
 
 /* System Global Interrupt Configuration Register */
 #define	SICFR_IPSA	0x00010000
@@ -31,7 +42,15 @@
 
 struct ipic {
 	volatile u32 __iomem	*regs;
-	unsigned int		irq_offset;
+
+	/* The remapper for this IPIC */
+	struct irq_host		*irqhost;
+
+	/* The "linux" controller struct */
+	struct irq_chip		hc_irq;
+
+	/* The device node of the interrupt controller */
+	struct device_node	*of_node;
 };
 
 struct ipic_info {