target/linux/coldfire/patches/050-mcfv4e_irq_magic_bit.patch

   1 From 3487b77acbb12f4174f46237f942918651b23aa7 Mon Sep 17 00:00:00 2001
   2 From: Kurt Mahan <kmahan@freescale.com>
   3 Date: Tue, 15 Apr 2008 17:14:55 -0600
   4 Subject: [PATCH] Fix setting low 31 interrupts to deal with magic bit 0
   5  of the IMRL register.
   6
   7 LTIBName: mcfv4e-irq-magic-bit
   8 Signed-off-by: Kurt Mahan <kmahan@freescale.com>
   9 ---
  10  arch/m68k/coldfire/ints.c |    9 ++++++---
  11  1 files changed, 6 insertions(+), 3 deletions(-)
  12
  13 --- a/arch/m68k/coldfire/ints.c
  14 +++ b/arch/m68k/coldfire/ints.c
  15 @@ -420,10 +420,13 @@ void m547x_8x_irq_enable(unsigned int ir
  16         }
  17  #endif
  18
  19 -       if (irq < 32)
  20 -               MCF_IMRL &= ~(1 << irq);
  21 -       else
  22 +       if (irq < 32) {
  23 +               /* *grumble* don't set low bit of IMRL */
  24 +               MCF_IMRL &= (~(1 << irq) & 0xfffffffe);
  25 +       }
  26 +       else {
  27                 MCF_IMRH &= ~(1 << (irq - 32));
  28 +       }
  29  }
  30
  31  void m547x_8x_irq_disable(unsigned int irq)