ar71xx: simplify misc IRQ handling

SVN-Revision: 32948

diff --git a/target/linux/ar71xx/patches-3.3/210-MIPS-ath79-simplify-misc-irq-handling.patch b/target/linux/ar71xx/patches-3.3/210-MIPS-ath79-simplify-misc-irq-handling.patch
new file mode 100644 (file)
index 0000000..84a8ca3
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.3/210-MIPS-ath79-simplify-misc-irq-handling.patch
@@ -0,0 +1,66 @@
+--- a/arch/mips/ath79/irq.c
++++ b/arch/mips/ath79/irq.c
+@@ -35,44 +35,17 @@ static void ath79_misc_irq_handler(unsig
+       pending = __raw_readl(base + AR71XX_RESET_REG_MISC_INT_STATUS) &
+                 __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
+ 
+-      if (pending & MISC_INT_UART)
+-              generic_handle_irq(ATH79_MISC_IRQ_UART);
+-
+-      else if (pending & MISC_INT_DMA)
+-              generic_handle_irq(ATH79_MISC_IRQ_DMA);
+-
+-      else if (pending & MISC_INT_PERFC)
+-              generic_handle_irq(ATH79_MISC_IRQ_PERFC);
+-
+-      else if (pending & MISC_INT_TIMER)
+-              generic_handle_irq(ATH79_MISC_IRQ_TIMER);
+-
+-      else if (pending & MISC_INT_TIMER2)
+-              generic_handle_irq(ATH79_MISC_IRQ_TIMER2);
+-
+-      else if (pending & MISC_INT_TIMER3)
+-              generic_handle_irq(ATH79_MISC_IRQ_TIMER3);
+-
+-      else if (pending & MISC_INT_TIMER4)
+-              generic_handle_irq(ATH79_MISC_IRQ_TIMER4);
+-
+-      else if (pending & MISC_INT_OHCI)
+-              generic_handle_irq(ATH79_MISC_IRQ_OHCI);
+-
+-      else if (pending & MISC_INT_ERROR)
+-              generic_handle_irq(ATH79_MISC_IRQ_ERROR);
+-
+-      else if (pending & MISC_INT_GPIO)
+-              generic_handle_irq(ATH79_MISC_IRQ_GPIO);
+-
+-      else if (pending & MISC_INT_WDOG)
+-              generic_handle_irq(ATH79_MISC_IRQ_WDOG);
++      if (!pending) {
++              spurious_interrupt();
++              return;
++      }
+ 
+-      else if (pending & MISC_INT_ETHSW)
+-              generic_handle_irq(ATH79_MISC_IRQ_ETHSW);
++      while (pending) {
++              int bit = __ffs(pending);
+ 
+-      else
+-              spurious_interrupt();
++              generic_handle_irq(ATH79_MISC_IRQ(bit));
++              pending &= ~BIT(bit);
++      }
+ }
+ 
+ static void ar71xx_misc_irq_unmask(struct irq_data *d)
+--- a/arch/mips/include/asm/mach-ath79/irq.h
++++ b/arch/mips/include/asm/mach-ath79/irq.h
+@@ -14,6 +14,7 @@
+ 
+ #define ATH79_MISC_IRQ_BASE   8
+ #define ATH79_MISC_IRQ_COUNT  32
++#define ATH79_MISC_IRQ(_x)    (ATH79_MISC_IRQ_BASE + (_x))
+ 
+ #define ATH79_PCI_IRQ_BASE    (ATH79_MISC_IRQ_BASE + ATH79_MISC_IRQ_COUNT)
+ #define ATH79_PCI_IRQ_COUNT   6