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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>
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1 changed files with 37 additions and 0 deletions
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@ -23,6 +23,7 @@
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#include <linux/init.h>
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#include <linux/of_address.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/smp.h>
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#include <linux/resource.h>
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#include <asm/cacheflush.h>
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@ -65,6 +66,10 @@ static void __iomem *pmsu_mp_base;
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extern void ll_disable_coherency(void);
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extern void ll_enable_coherency(void);
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static struct platform_device armada_xp_cpuidle_device = {
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.name = "cpuidle-armada-370-xp",
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};
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static struct of_device_id of_pmsu_table[] = {
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{ .compatible = "marvell,armada-370-pmsu", },
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{ .compatible = "marvell,armada-370-xp-pmsu", },
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@ -258,4 +263,36 @@ static struct notifier_block armada_370_xp_cpu_pm_notifier = {
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.notifier_call = armada_370_xp_cpu_pm_notify,
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};
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int __init armada_370_xp_cpu_pm_init(void)
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{
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struct device_node *np;
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/*
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* Check that all the requirements are available to enable
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* cpuidle. So far, it is only supported on Armada XP, cpuidle
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* needs the coherency fabric and the PMSU enabled
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*/
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if (!of_machine_is_compatible("marvell,armadaxp"))
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return 0;
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np = of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric");
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if (!np)
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return 0;
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of_node_put(np);
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np = of_find_matching_node(NULL, of_pmsu_table);
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if (!np)
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return 0;
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of_node_put(np);
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armada_370_xp_pmsu_enable_l2_powerdown_onidle();
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armada_xp_cpuidle_device.dev.platform_data = armada_370_xp_cpu_suspend;
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platform_device_register(&armada_xp_cpuidle_device);
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cpu_pm_register_notifier(&armada_370_xp_cpu_pm_notifier);
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return 0;
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}
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arch_initcall(armada_370_xp_cpu_pm_init);
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early_initcall(armada_370_xp_pmsu_init);
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