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>

diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
index 9e9095c65129a7a6a1274d1d3be4d2be2d4e986c..3b5a5a8328249a7e83a5603bf57ff9d03376e579 100644 (file)
--- 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) {