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Subject[PATCH v6 11/11] ARM: mvebu: register the cpuidle driver for the Armada XP SoCs
Date
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>
---
arch/arm/mach-mvebu/pmsu.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)

diff --git a/arch/arm/mach-mvebu/pmsu.c b/arch/arm/mach-mvebu/pmsu.c
index 9ea2bb44d573..e105e33cf3f0 100644
--- 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", },
@@ -281,4 +286,36 @@ 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);
--
1.8.1.2


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