Messages in this thread Patch in this message | | | From | Gregory CLEMENT <> | Subject | [PATCH v6 11/11] ARM: mvebu: register the cpuidle driver for the Armada XP SoCs | Date | Fri, 28 Mar 2014 12:13:31 +0100 |
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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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