ARM: mvebu: register the cpuidle driver for the Armada XP SoCs

The cpuidle is a platform driver so we register the device just after
the initialization of the board in an arch_initcall.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Link: https://lkml.kernel.org/r/1397488214-20685-12-git-send-email-gregory.clement@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

diff --git a/arch/arm/mach-mvebu/pmsu.c b/arch/arm/mach-mvebu/pmsu.c
index 7902d21d7d68193d3737c42357a0d6366a979fb4..53a55c8520bf9a1fbab97919457af791f202ca2d 100644 (file)
--- a/arch/arm/mach-mvebu/pmsu.c
+++ b/arch/arm/mach-mvebu/pmsu.c
@@ -23,6 +23,7 @@
 #include <linux/init.h>
 #include <linux/of_address.h>
 #include <linux/io.h>
+#include <linux/platform_device.h>
 #include <linux/smp.h>
 #include <linux/resource.h>
 #include <asm/cacheflush.h>
@@ -65,6 +66,10 @@ static void __iomem *pmsu_mp_base;
 extern void ll_disable_coherency(void);
 extern void ll_enable_coherency(void);
 
+static struct platform_device armada_xp_cpuidle_device = {
+       .name = "cpuidle-armada-370-xp",
+};
+
 static struct of_device_id of_pmsu_table[] = {
        { .compatible = "marvell,armada-370-pmsu", },
        { .compatible = "marvell,armada-370-xp-pmsu", },
@@ -258,4 +263,36 @@ static struct notifier_block armada_370_xp_cpu_pm_notifier = {
        .notifier_call = armada_370_xp_cpu_pm_notify,
 };
 
+int __init armada_370_xp_cpu_pm_init(void)
+{
+       struct device_node *np;
+
+       /*
+        * Check that all the requirements are available to enable
+        * cpuidle. So far, it is only supported on Armada XP, cpuidle
+        * needs the coherency fabric and the PMSU enabled
+        */
+
+       if (!of_machine_is_compatible("marvell,armadaxp"))
+               return 0;
+
+       np = of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric");
+       if (!np)
+               return 0;
+       of_node_put(np);
+
+       np = of_find_matching_node(NULL, of_pmsu_table);
+       if (!np)
+               return 0;
+       of_node_put(np);
+
+       armada_370_xp_pmsu_enable_l2_powerdown_onidle();
+       armada_xp_cpuidle_device.dev.platform_data = armada_370_xp_cpu_suspend;
+       platform_device_register(&armada_xp_cpuidle_device);
+       cpu_pm_register_notifier(&armada_370_xp_cpu_pm_notifier);
+
+       return 0;
+}
+
+arch_initcall(armada_370_xp_cpu_pm_init);
 early_initcall(armada_370_xp_pmsu_init);