leon3/gptimer: Set IP bit on interrupt

Setting the IP bit in the GPTIMER CTRL register is
necessary, if using shared interrupts, to determine
which of the timers generated the interrupt.

The IP bit is cleared when a one is written to it.

1 files changed, 8 insertions, 0 deletions

diff --git a/grlib.c b/grlib.c
index c2d2acf..29785d3 100644
--- a/grlib.c
+++ b/grlib.c
@@ -753,6 +753,8 @@ gpt_intr (int32 i)
 	}
       if (gpt_ctrl[i] & 8)
 	{
+	  /* Set Interrupt Pending (IP) bit to allow for shared interrupt handling */
+	  gpt_ctrl[i] |= 0x10;
 	  grlib_set_irq (gpt_irq + i);
 	}
       gpt_add_intr (i);
@@ -827,6 +829,12 @@ gpt_ctrl_write (uint32 val, int i)
       gpt_add_intr (i);
     }
   gpt_ctrl[i] = val & 0xb;
+
+  if (val & 0x10)
+    {
+      /* Clear Interrupt Pending (IP) bit if a 1 is written to it */
+      gpt_ctrl[i] &= ~0x10;
+    }
 }
 
 static uint32