target/linux/omap/patches-3.12/802-ARM_OMAP3plus_do_not register_non-dt_OPP_tables_for_device_tree_boot.patch

   1 From 92d51856d7405fa55bcf3d6f20d7e97e0bf2656c Mon Sep 17 00:00:00 2001
   2 From: Nishanth Menon <nm@ti.com>
   3 Date: Wed, 16 Oct 2013 15:39:01 +0000
   4 Subject: ARM: OMAP3+: do not register non-dt OPP tables for device tree boot
   5
   6 OMAP3+ supports both device tree and non-device tree boot.
   7 Device tree bindings for OMAP3+ is supposed to be added via dts following:
   8 Documentation/devicetree/bindings/power/opp.txt
   9
  10 Since we now have device tree entries for OMAP3+ cpu OPPs,
  11 The current code wrongly adds duplicate OPPs. So, dont register OPPs
  12 when booting using device tree.
  13
  14 Signed-off-by: Nishanth Menon <nm@ti.com>
  15 Signed-off-by: Tony Lindgren <tony@atomide.com>
  16 ---
  17 diff --git a/arch/arm/mach-omap2/opp.c b/arch/arm/mach-omap2/opp.c
  18 index bd41d59..82fd8c7 100644
  19 --- a/arch/arm/mach-omap2/opp.c
  20 +++ b/arch/arm/mach-omap2/opp.c
  21 @@ -17,6 +17,7 @@
  22   * GNU General Public License for more details.
  23   */
  24  #include <linux/module.h>
  25 +#include <linux/of.h>
  26  #include <linux/opp.h>
  27  #include <linux/cpu.h>
  28
  29 @@ -40,6 +41,9 @@ int __init omap_init_opp_table(struct omap_opp_def *opp_def,
  30  {
  31         int i, r;
  32
  33 +       if (of_have_populated_dt())
  34 +               return -EINVAL;
  35 +
  36         if (!opp_def || !opp_def_size) {
  37                 pr_err("%s: invalid params!\n", __func__);
  38                 return -EINVAL;
  39 --
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