1. 12 Jan, 2006 1 commit
  2. 09 Jan, 2006 1 commit
    • Russell King's avatar
      [PATCH] IRQ type flags · 9ded96f2
      Russell King authored
      
      
      Some ARM platforms have the ability to program the interrupt controller to
      detect various interrupt edges and/or levels.  For some platforms, this is
      critical to setup correctly, particularly those which the setting is dependent
      on the device.
      
      Currently, ARM drivers do (eg) the following:
      
      	err = request_irq(irq, ...);
      
      	set_irq_type(irq, IRQT_RISING);
      
      However, if the interrupt has previously been programmed to be level sensitive
      (for whatever reason) then this will cause an interrupt storm.
      
      Hence, if we combine set_irq_type() with request_irq(), we can then safely set
      the type prior to unmasking the interrupt.  The unfortunate problem is that in
      order to support this, these flags need to be visible outside of the ARM
      architecture - drivers such as smc91x need these flags and they're
      cross-architecture.
      
      Finally, the SA_TRIGGER_* flag passed to request_irq() should reflect the
      property that the device would like.  The IRQ controller code should do its
      best to select the most appropriate supported mode.
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      9ded96f2
  3. 10 Oct, 2005 1 commit
  4. 06 Oct, 2005 1 commit
  5. 11 Sep, 2005 1 commit