20 Sep, 2011

1 commit

• eef24afb2   irq: Fix check for already initialized irq_domain in irq_domain_add ... Browse Code »

  The sanity check in irq_domain_add() tests desc->irq_data != NULL or
  irq_data->domain != NULL. This prevents adding an irq_domain to a irq
  descriptor when irq_data exists, which true when the irq descriptor
  exists.

  This went unnoticed so far as the simple domain code did not enter
  this code path because domain->nr_irqs is always 0 for the simple domains.

  Split the check for irq_data == NULL out and have a separate warning
  for it.

  [ tglx: Made the check for irq_data == NULL separate ]

  Signed-off-by: Rob Herring
  Cc: Grant Likely
  Cc: marc.zyngier@arm.com
  Cc: thomas.abraham@linaro.org
  Cc: jamie@jamieiles.com
  Cc: b-cousson@ti.com
  Cc: shawn.guo@linaro.org
  Cc: linux-arm-kernel@lists.infradead.org
  Cc: devicetree-discuss@lists.ozlabs.org
  Link: http://lkml.kernel.org/r/1316017900-19918-3-git-send-email-robherring2@gmail.com
  Signed-off-by: Thomas Gleixner

  Rob Herring

  2011-09-20 18:16:22 +0800  

28 Jul, 2011

2 commits

• 7e7133016   dt/irq: add irq_domain_generate_simple() helper ... Browse Code »

  irq_domain_generate_simple() is an easy way to generate an irq translation
  domain for simple irq controllers. It assumes a flat 1:1 mapping from
  hardware irq number to an offset of the first linux irq number assigned
  to the controller

  Signed-off-by: Grant Likely

  Grant Likely

  2011-07-28 15:32:04 +0800  
• 08a543ad3   irq: add irq_domain translation infrastructure ... Browse Code »

  This patch adds irq_domain infrastructure for translating from
  hardware irq numbers to linux irqs. This is particularly important
  for architectures adding device tree support because the current
  implementation (excluding PowerPC and SPARC) cannot handle
  translation for more than a single interrupt controller. irq_domain
  supports device tree translation for any number of interrupt
  controllers.

  This patch converts x86, Microblaze, ARM and MIPS to use irq_domain
  for device tree irq translation. x86 is untested beyond compiling it,
  irq_domain is enabled for MIPS and Microblaze, but the old behaviour is
  preserved until the core code is modified to actually register an
  irq_domain yet. On ARM it works and is required for much of the new
  ARM device tree board support.

  PowerPC has /not/ been converted to use this new infrastructure. It
  is still missing some features before it can replace the virq
  infrastructure already in powerpc (see documentation on
  irq_domain_map/unmap for details). Followup patches will add the
  missing pieces and migrate PowerPC to use irq_domain.

  SPARC has its own method of managing interrupts from the device tree
  and is unaffected by this change.

  Acked-by: Ralf Baechle
  Signed-off-by: Grant Likely

  Grant Likely

  2011-07-28 15:32:04 +0800