ARM: OMAP4: PM: Remove L4 wakeup depedency with MPU since errata fix exist now

With commit bfd6d021 {ARM: OMAP3+: Implement timer workaround for errata
i103 and i767}, the sync and gptimer synchronization errata got fixed.

Hence the l4_wakeup static dependency with MPU can  can be removed
now. Static dependency was one of the proposed workaround but from
power savings perspective, it isn't an ideal workaround.

Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

1 files changed, 2 insertions, 8 deletions

diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
index 9e9095c65129..3b5a5a832824 100644
--- a/arch/arm/mach-omap2/pm44xx.c
+++ b/arch/arm/mach-omap2/pm44xx.c
@@ -143,7 +143,7 @@ static void omap_default_idle(void)
 int __init omap4_pm_init(void)
 {
         int ret;
-        struct clockdomain *emif_clkdm, *mpuss_clkdm, *l3_1_clkdm, *l4wkup;
+        struct clockdomain *emif_clkdm, *mpuss_clkdm, *l3_1_clkdm;
         struct clockdomain *ducati_clkdm, *l3_2_clkdm, *l4_per_clkdm;
 
         if (omap_rev() == OMAP4430_REV_ES1_0) {
@@ -171,19 +171,14 @@ int __init omap4_pm_init(void)
          * MPUSS -> L4_PER/L3_* and DUCATI -> L3_* doesn't work as
          * expected. The hardware recommendation is to enable static
          * dependencies for these to avoid system lock ups or random crashes.
-         * The L4 wakeup depedency is added to workaround the OCP sync hardware
-         * BUG with 32K synctimer which lead to incorrect timer value read
-         * from the 32K counter. The BUG applies for GPTIMER1 and WDT2 which
-         * are part of L4 wakeup clockdomain.
          */
         mpuss_clkdm = clkdm_lookup("mpuss_clkdm");
         emif_clkdm = clkdm_lookup("l3_emif_clkdm");
         l3_1_clkdm = clkdm_lookup("l3_1_clkdm");
         l3_2_clkdm = clkdm_lookup("l3_2_clkdm");
         l4_per_clkdm = clkdm_lookup("l4_per_clkdm");
-        l4wkup = clkdm_lookup("l4_wkup_clkdm");
         ducati_clkdm = clkdm_lookup("ducati_clkdm");
-        if ((!mpuss_clkdm) || (!emif_clkdm) || (!l3_1_clkdm) || (!l4wkup) ||
+        if ((!mpuss_clkdm) || (!emif_clkdm) || (!l3_1_clkdm) ||
                 (!l3_2_clkdm) || (!ducati_clkdm) || (!l4_per_clkdm))
                 goto err2;
 
@@ -191,7 +186,6 @@ int __init omap4_pm_init(void)
         ret |= clkdm_add_wkdep(mpuss_clkdm, l3_1_clkdm);
         ret |= clkdm_add_wkdep(mpuss_clkdm, l3_2_clkdm);
         ret |= clkdm_add_wkdep(mpuss_clkdm, l4_per_clkdm);
-        ret |= clkdm_add_wkdep(mpuss_clkdm, l4wkup);
         ret |= clkdm_add_wkdep(ducati_clkdm, l3_1_clkdm);
         ret |= clkdm_add_wkdep(ducati_clkdm, l3_2_clkdm);
         if (ret) {