[ARM] 5233/1: Allow PXA to have ISA IRQs numbered 0-15

Allow PXA IRQs to be numbered starting at 16, leaving 0 to 15 for the
ISA IRQs, if needed.

This patch depends on RMK's PXA_HAVE_BOARD_IRQS patch.

Signed-off-by: Marc Zyngier <marc.zyngier@altran.com>
Acked-by: Russel King <linux@arm.linux.org.uk>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 15 insertions, 5 deletions

diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index c9643bd4849c..b0417122d4e4 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -353,4 +353,7 @@ config TOSA_BT
 config PXA_HAVE_BOARD_IRQS
         bool
 
+config PXA_HAVE_ISA_IRQS
+        bool
+
 endif
diff --git a/arch/arm/mach-pxa/include/mach/entry-macro.S b/arch/arm/mach-pxa/include/mach/entry-macro.S
index de16c12d5232..f6b4bf3e73d2 100644
--- a/arch/arm/mach-pxa/include/mach/entry-macro.S
+++ b/arch/arm/mach-pxa/include/mach/entry-macro.S
@@ -41,7 +41,7 @@
                 and     \irqstat, \irqstat, \irqnr
                 clz     \irqnr, \irqstat
                 rsb     \irqnr, \irqnr, #31
-                add     \irqnr, \irqnr, #32
+                add     \irqnr, \irqnr, #(32 + PXA_IRQ(0))
                 b       1001f
 1003:
                 mrc     p6, 0, \irqstat, c0, c0, 0      @ ICIP
@@ -52,6 +52,6 @@
                 rsb     \irqstat, \irqnr, #0
                 and     \irqstat, \irqstat, \irqnr
                 clz     \irqnr, \irqstat
-                rsb     \irqnr, \irqnr, #31
+                rsb     \irqnr, \irqnr, #(31 + PXA_IRQ(0))
 1001:
                 .endm
diff --git a/arch/arm/mach-pxa/include/mach/irqs.h b/arch/arm/mach-pxa/include/mach/irqs.h
index ce3ce17ce3d3..9c163e19ada9 100644
--- a/arch/arm/mach-pxa/include/mach/irqs.h
+++ b/arch/arm/mach-pxa/include/mach/irqs.h
@@ -11,7 +11,14 @@
  */
 
 
-#define PXA_IRQ(x)      (x)
+#ifdef CONFIG_PXA_HAVE_ISA_IRQS
+#define PXA_ISA_IRQ(x)  (x)
+#define PXA_ISA_IRQ_NUM (16)
+#else
+#define PXA_ISA_IRQ_NUM (0)
+#endif
+
+#define PXA_IRQ(x)      (PXA_ISA_IRQ_NUM + (x))
 
 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
 #define IRQ_SSP3        PXA_IRQ(0)      /* SSP3 service request */
@@ -73,7 +80,7 @@
 #define IRQ_MMC3        PXA_IRQ(55)     /* MMC3 Controller (PXA310) */
 #endif
 
-#define PXA_GPIO_IRQ_BASE       (64)
+#define PXA_GPIO_IRQ_BASE       PXA_IRQ(64)
 #define PXA_GPIO_IRQ_NUM        (128)
 
 #define GPIO_2_x_TO_IRQ(x)      (PXA_GPIO_IRQ_BASE + (x))
diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index 5e95c5372fec..fa69c3a6a38e 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -57,7 +57,7 @@ void __init pxa_init_irq(int irq_nr, set_wake_t fn)
 
         pxa_internal_irq_nr = irq_nr;
 
-        for (irq = 0; irq < irq_nr; irq += 32) {
+        for (irq = PXA_IRQ(0); irq < PXA_IRQ(irq_nr); irq += 32) {
                 _ICMR(irq) = 0; /* disable all IRQs */
                 _ICLR(irq) = 0; /* all IRQs are IRQ, not FIQ */
         }