Merge tag 'mvebu-fixes-4.0' of git://git.infradead.org/linux-mvebu into fixes

Merge "ARM: mvebu: fixes for v4.0" from Gregory Clement:

mvebu fix for 4.0

Disable CPU Idle on Armada 38x

* tag 'mvebu-fixes-4.0' of git://git.infradead.org/linux-mvebu:
  ARM: mvebu: Disable CPU Idle on Armada 38x

Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 15 insertions, 1 deletions

diff --git a/arch/arm/mach-mvebu/pmsu.c b/arch/arm/mach-mvebu/pmsu.c
index 8b9f5e202ccf..4f4e22206ae5 100644
--- a/arch/arm/mach-mvebu/pmsu.c
+++ b/arch/arm/mach-mvebu/pmsu.c
@@ -415,6 +415,9 @@ static __init int armada_38x_cpuidle_init(void)
         void __iomem *mpsoc_base;
         u32 reg;
 
+        pr_warn("CPU idle is currently broken on Armada 38x: disabling");
+        return 0;
+
         np = of_find_compatible_node(NULL, NULL,
                                      "marvell,armada-380-coherency-fabric");
         if (!np)
@@ -476,6 +479,16 @@ static int __init mvebu_v7_cpu_pm_init(void)
                 return 0;
         of_node_put(np);
 
+        /*
+         * Currently the CPU idle support for Armada 38x is broken, as
+         * the CPU hotplug uses some of the CPU idle functions it is
+         * broken too, so let's disable it
+         */
+        if (of_machine_is_compatible("marvell,armada380")) {
+                cpu_hotplug_disable();
+                pr_warn("CPU hotplug support is currently broken on Armada 38x: disabling");
+        }
+
         if (of_machine_is_compatible("marvell,armadaxp"))
                 ret = armada_xp_cpuidle_init();
         else if (of_machine_is_compatible("marvell,armada370"))
@@ -489,7 +502,8 @@ static int __init mvebu_v7_cpu_pm_init(void)
                 return ret;
 
         mvebu_v7_pmsu_enable_l2_powerdown_onidle();
-        platform_device_register(&mvebu_v7_cpuidle_device);
+        if (mvebu_v7_cpuidle_device.name)
+                platform_device_register(&mvebu_v7_cpuidle_device);
         cpu_pm_register_notifier(&mvebu_v7_cpu_pm_notifier);
 
         return 0;