diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
commit | d0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch) | |
tree | 7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /arch/arm/mach-omap2/omap-mpuss-lowpower.c | |
parent | e914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff) |
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'arch/arm/mach-omap2/omap-mpuss-lowpower.c')
-rw-r--r-- | arch/arm/mach-omap2/omap-mpuss-lowpower.c | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/arch/arm/mach-omap2/omap-mpuss-lowpower.c b/arch/arm/mach-omap2/omap-mpuss-lowpower.c index 65024af16..ad982465e 100644 --- a/arch/arm/mach-omap2/omap-mpuss-lowpower.c +++ b/arch/arm/mach-omap2/omap-mpuss-lowpower.c @@ -62,7 +62,9 @@ #include "prm44xx.h" #include "prm-regbits-44xx.h" -#ifdef CONFIG_SMP +static void __iomem *sar_base; + +#if defined(CONFIG_PM) && defined(CONFIG_SMP) struct omap4_cpu_pm_info { struct powerdomain *pwrdm; @@ -90,7 +92,6 @@ struct cpu_pm_ops { static DEFINE_PER_CPU(struct omap4_cpu_pm_info, omap4_pm_info); static struct powerdomain *mpuss_pd; -static void __iomem *sar_base; static u32 cpu_context_offset; static int default_finish_suspend(unsigned long cpu_state) @@ -366,9 +367,6 @@ int __init omap4_mpuss_init(void) return -ENODEV; } - if (cpu_is_omap44xx()) - sar_base = omap4_get_sar_ram_base(); - /* Initilaise per CPU PM information */ pm_info = &per_cpu(omap4_pm_info, 0x0); if (sar_base) { @@ -444,3 +442,26 @@ int __init omap4_mpuss_init(void) } #endif + +/* + * For kexec, we must set CPU1_WAKEUP_NS_PA_ADDR to point to + * current kernel's secondary_startup() early before + * clockdomains_init(). Otherwise clockdomain_init() can + * wake CPU1 and cause a hang. + */ +void __init omap4_mpuss_early_init(void) +{ + unsigned long startup_pa; + + if (!cpu_is_omap44xx()) + return; + + sar_base = omap4_get_sar_ram_base(); + + if (cpu_is_omap443x()) + startup_pa = virt_to_phys(omap4_secondary_startup); + else + startup_pa = virt_to_phys(omap4460_secondary_startup); + + writel_relaxed(startup_pa, sar_base + CPU1_WAKEUP_NS_PA_ADDR_OFFSET); +} |