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 --- a/arch/arm/mach-omap2/opp.c
  18 +++ b/arch/arm/mach-omap2/opp.c
  19 @@ -17,6 +17,7 @@
  20   * GNU General Public License for more details.
  21   */
  22  #include <linux/module.h>
  23 +#include <linux/of.h>
  24  #include <linux/opp.h>
  25  #include <linux/cpu.h>
  26
  27 @@ -40,6 +41,9 @@ int __init omap_init_opp_table(struct om
  28  {
  29         int i, r;
  30
  31 +       if (of_have_populated_dt())
  32 +               return -EINVAL;
  33 +
  34         if (!opp_def || !opp_def_size) {
  35                 pr_err("%s: invalid params!\n", __func__);
  36                 return -EINVAL;