recipes-kernel/linux/linux-3.0/for_3.1/pm-misc/0002-OMAP3-SR-enable-disable-SR-only-on-need.patch

   1 From 2c555d8ee3544326033cb3b0ead6c0eb48cb4919 Mon Sep 17 00:00:00 2001
   2 From: Nishanth Menon <nm@ti.com>
   3 Date: Mon, 14 Feb 2011 21:14:17 +0530
   4 Subject: [PATCH 2/7] OMAP3+: SR: enable/disable SR only on need
   5
   6 Since we already know the state of the autocomp enablement, we can
   7 see if the requested state is different from the current state and
   8 enable/disable SR only on the need basis.
   9
  10 Signed-off-by: Nishanth Menon <nm@ti.com>
  11 Signed-off-by: Kevin Hilman <khilman@ti.com>
  12 ---
  13  arch/arm/mach-omap2/smartreflex.c |   11 +++++++----
  14  1 files changed, 7 insertions(+), 4 deletions(-)
  15
  16 diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
  17 index 998b57f..a4b4319 100644
  18 --- a/arch/arm/mach-omap2/smartreflex.c
  19 +++ b/arch/arm/mach-omap2/smartreflex.c
  20 @@ -809,10 +809,13 @@ static int omap_sr_autocomp_store(void *data, u64 val)
  21                 return -EINVAL;
  22         }
  23
  24 -       if (!val)
  25 -               sr_stop_vddautocomp(sr_info);
  26 -       else
  27 -               sr_start_vddautocomp(sr_info);
  28 +       /* control enable/disable only if there is a delta in value */
  29 +       if (sr_info->autocomp_active != val) {
  30 +               if (!val)
  31 +                       sr_stop_vddautocomp(sr_info);
  32 +               else
  33 +                       sr_start_vddautocomp(sr_info);
  34 +       }
  35
  36         return 0;
  37  }
  38 --
  39 1.6.6.1
  40