From 7272272025c2ebb04642924526211f0d8e6e18c2 Mon Sep 17 00:00:00 2001 From: Santosh Shilimkar Date: Tue, 8 Mar 2011 18:24:30 +0530 Subject: [PATCH] --- yaml --- r: 281858 b: refs/heads/master c: 12f27826bdaf56b01cbdfc8bdeb577ebc106dee3 h: refs/heads/master v: v3 --- [refs] | 2 +- trunk/arch/arm/mach-omap2/pm44xx.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+), 1 deletion(-) diff --git a/[refs] b/[refs] index bcacb87ab024..1d0cd0e63900 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 501f0c751de06d8484b4279131c26f58bd49a69d +refs/heads/master: 12f27826bdaf56b01cbdfc8bdeb577ebc106dee3 diff --git a/trunk/arch/arm/mach-omap2/pm44xx.c b/trunk/arch/arm/mach-omap2/pm44xx.c index 8edb015f5618..715035d0512a 100644 --- a/trunk/arch/arm/mach-omap2/pm44xx.c +++ b/trunk/arch/arm/mach-omap2/pm44xx.c @@ -99,6 +99,8 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused) static int __init omap4_pm_init(void) { int ret; + struct clockdomain *emif_clkdm, *mpuss_clkdm, *l3_1_clkdm; + struct clockdomain *ducati_clkdm, *l3_2_clkdm, *l4_per_clkdm; if (!cpu_is_omap44xx()) return -ENODEV; @@ -111,6 +113,34 @@ static int __init omap4_pm_init(void) goto err2; } + /* + * The dynamic dependency between MPUSS -> MEMIF and + * 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. + */ + 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"); + ducati_clkdm = clkdm_lookup("ducati_clkdm"); + if ((!mpuss_clkdm) || (!emif_clkdm) || (!l3_1_clkdm) || + (!l3_2_clkdm) || (!ducati_clkdm) || (!l4_per_clkdm)) + goto err2; + + ret = clkdm_add_wkdep(mpuss_clkdm, emif_clkdm); + 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(ducati_clkdm, l3_1_clkdm); + ret |= clkdm_add_wkdep(ducati_clkdm, l3_2_clkdm); + if (ret) { + pr_err("Failed to add MPUSS -> L3/EMIF/L4PER, DUCATI -> L3 " + "wakeup dependency\n"); + goto err2; + } + #ifdef CONFIG_SUSPEND suspend_set_ops(&omap_pm_ops); #endif /* CONFIG_SUSPEND */