[ARM] pxa: allow IRQ_BOARD_END to be customized and make zylonite to use it

The default value is 16 IRQs. Zylonite needs 32, ASIC3 based boards need 70.

My problem is still that due to the way IRQ_GPIO is hardcoded, ASIC3 based boards
need 70 IRQs starting at IRQ_BOARD_START. If I define ASIC3 IRQs similar to LoCoMo
or SA1111, things break as soon as something selects PXA_HAVE_BOARD_IRQS.
Increasing the default number of board IRQs to 70 instead doesn't seem very nice.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>

2 files changed, 12 insertions, 5 deletions

diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 47747f96f125..3b34f34db204 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -280,6 +280,7 @@ config MACH_ZYLONITE
         select PXA3xx
         select PXA_SSP
         select HAVE_PWM
+        select PXA_HAVE_BOARD_IRQS
 
 config MACH_LITTLETON
         bool "PXA3xx Form Factor Platform (aka Littleton)"
diff --git a/arch/arm/mach-pxa/include/mach/irqs.h b/arch/arm/mach-pxa/include/mach/irqs.h
index 32bb4a2eb7f1..ebf38bbb347f 100644
--- a/arch/arm/mach-pxa/include/mach/irqs.h
+++ b/arch/arm/mach-pxa/include/mach/irqs.h
@@ -91,13 +91,21 @@
 #define IRQ_TO_GPIO(i)  (((i) < IRQ_GPIO(2)) ? ((i) - IRQ_GPIO0) : IRQ_TO_GPIO_2_x(i))
 
 /*
- * The next 16 interrupts are for board specific purposes.  Since
+ * The following interrupts are for board specific purposes. Since
  * the kernel can only run on one machine at a time, we can re-use
- * these.  If you need more, increase IRQ_BOARD_END, but keep it
- * within sensible limits.
+ * these.  There will be 16 IRQs by default.  If it is not enough,
+ * IRQ_BOARD_END is allowed be customized for each board, but keep
+ * the numbers within sensible limits and in descending order, so
+ * when multiple config options are selected, the maximum will be
+ * used.
  */
 #define IRQ_BOARD_START         (PXA_GPIO_IRQ_BASE + PXA_GPIO_IRQ_NUM)
+
+#if defined(CONFIG_MACH_ZYLONITE)
+#define IRQ_BOARD_END           (IRQ_BOARD_START + 32)
+#else
 #define IRQ_BOARD_END           (IRQ_BOARD_START + 16)
+#endif
 
 #define IRQ_SA1111_START        (IRQ_BOARD_END)
 #define IRQ_GPAIN0              (IRQ_BOARD_END + 0)
@@ -188,8 +196,6 @@
 #define NR_IRQS                 (IRQ_LOCOMO_SPI_TEND + 1)
 #elif defined(CONFIG_PXA_HAVE_BOARD_IRQS)
 #define NR_IRQS                 (IRQ_BOARD_END)
-#elif defined(CONFIG_MACH_ZYLONITE)
-#define NR_IRQS                 (IRQ_BOARD_START + 32)
 #else
 #define NR_IRQS                 (IRQ_BOARD_START)
 #endif