target/linux/leon/patches/001-find_irq_and_timer_via_of.patch

   1 From af1da1d5a8701f39cdbae4a0ab8e04b450eef298 Mon Sep 17 00:00:00 2001
   2 From: Daniel Hellstrom <daniel@gaisler.com>
   3 Date: Wed, 8 Sep 2010 18:05:38 +0200
   4 Subject: [PATCH] SPARC/LEON: find IRQ and Timer via OF-Tree, instead of hardcoded.
   5
   6 Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
   7 ---
   8  arch/sparc/kernel/leon_kernel.c |   23 ++++++++++++++++++++++-
   9  1 files changed, 22 insertions(+), 1 deletions(-)
  10
  11 --- a/arch/sparc/kernel/leon_kernel.c
  12 +++ b/arch/sparc/kernel/leon_kernel.c
  13 @@ -105,13 +105,34 @@ static void leon_disable_irq(unsigned in
  14  void __init leon_init_timers(irq_handler_t counter_fn)
  15  {
  16         int irq;
  17 +       struct device_node *rootnp, *np;
  18 +       struct property *pp;
  19 +       int len;
  20
  21         leondebug_irq_disable = 0;
  22         leon_debug_irqout = 0;
  23         master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
  24         dummy_master_l10_counter = 0;
  25
  26 -       if (leon3_gptimer_regs && leon3_irqctrl_regs) {
  27 +       /* Find IRQMP IRQ Controller Registers base address otherwise bail out. */
  28 +       rootnp = of_find_node_by_path("/ambapp0");
  29 +       if (rootnp && (np=of_find_node_by_name(rootnp, "GAISLER_IRQMP"))) {
  30 +               pp = of_find_property(np, "reg", &len);
  31 +               if (pp)
  32 +                       leon3_irqctrl_regs = *(struct leon3_irqctrl_regs_map **)pp->value;
  33 +       }
  34 +
  35 +       /* Find GPTIMER Timer Registers base address otherwise bail out. */
  36 +       if (rootnp && (np=of_find_node_by_name(rootnp, "GAISLER_GPTIMER"))) {
  37 +               pp = of_find_property(np, "reg", &len);
  38 +               if (pp)
  39 +                       leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)pp->value;
  40 +               pp = of_find_property(np, "interrupts", &len);
  41 +               if (pp)
  42 +                       leon3_gptimer_irq = *(unsigned int *)pp->value;
  43 +       }
  44 +
  45 +       if (leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq) {
  46                 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].val, 0);
  47                 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].rld,
  48                                       (((1000000 / HZ) - 1)));