target/linux/omap/patches-3.12/202-ARM-OMAP2-hwmod-Extract-no-idle-and-no-reset-info-from-DT.patch

   1 Now that we have DT bindings to specify which devices should not
   2 be reset and idled during init, make hwmod extract the information
   3 (and store them in internal flags) from Device tree.
   4
   5 Signed-off-by: Rajendra Nayak <rnayak@ti.com>
   6
   7 ---
   8 arch/arm/mach-omap2/omap_hwmod.c |   23 ++++++++++++++++-------
   9  1 file changed, 16 insertions(+), 7 deletions(-)
  10
  11 --- a/arch/arm/mach-omap2/omap_hwmod.c
  12 +++ b/arch/arm/mach-omap2/omap_hwmod.c
  13 @@ -2363,11 +2363,11 @@ static struct device_node *of_dev_hwmod_
  14   * are part of the device's address space can be ioremapped properly.
  15   * No return value.
  16   */
  17 -static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data)
  18 +static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data,
  19 +                                    struct device_node *np)
  20  {
  21         struct omap_hwmod_addr_space *mem;
  22         void __iomem *va_start = NULL;
  23 -       struct device_node *np;
  24
  25         if (!oh)
  26                 return;
  27 @@ -2383,12 +2383,10 @@ static void __init _init_mpu_rt_base(str
  28                          oh->name);
  29
  30                 /* Extract the IO space from device tree blob */
  31 -               if (!of_have_populated_dt())
  32 +               if (!np)
  33                         return;
  34
  35 -               np = of_dev_hwmod_lookup(of_find_node_by_name(NULL, "ocp"), oh);
  36 -               if (np)
  37 -                       va_start = of_iomap(np, oh->mpu_rt_idx);
  38 +               va_start = of_iomap(np, oh->mpu_rt_idx);
  39         } else {
  40                 va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start);
  41         }
  42 @@ -2420,12 +2418,16 @@ static void __init _init_mpu_rt_base(str
  43  static int __init _init(struct omap_hwmod *oh, void *data)
  44  {
  45         int r;
  46 +       struct device_node *np = NULL;
  47
  48         if (oh->_state != _HWMOD_STATE_REGISTERED)
  49                 return 0;
  50
  51 +       if (of_have_populated_dt())
  52 +               np = of_dev_hwmod_lookup(of_find_node_by_name(NULL, "ocp"), oh);
  53 +
  54         if (oh->class->sysc)
  55 -               _init_mpu_rt_base(oh, NULL);
  56 +               _init_mpu_rt_base(oh, NULL, np);
  57
  58         r = _init_clocks(oh, NULL);
  59         if (r < 0) {
  60 @@ -2433,6 +2435,13 @@ static int __init _init(struct omap_hwmo
  61                 return -EINVAL;
  62         }
  63
  64 +       if (np) {
  65 +               if (of_find_property(np, "ti,no-reset-on-init", NULL))
  66 +                       oh->flags |= HWMOD_INIT_NO_RESET;
  67 +               if (of_find_property(np, "ti,no-idle-on-init", NULL))
  68 +                       oh->flags |= HWMOD_INIT_NO_IDLE;
  69 +       }
  70 +
  71         oh->_state = _HWMOD_STATE_INITIALIZED;
  72
  73         return 0;