[PATCH v7 11/11] ARM: mvebu: register the cpuidle driver for the Armada XP SoCs
From: Gregory CLEMENT <hidden>
Date: 2014-04-14 15:11:00
Also in:
linux-pm, lkml
Subsystem:
arm port, arm/marvell kirkwood and armada 370, 375, 38x, 39x, xp, 3700, 7k/8k, cn9130 soc support, the rest · Maintainers:
Russell King, Andrew Lunn, Gregory Clement, Sebastian Hesselbarth, Linus Torvalds
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 <redacted> --- 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);
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1.8.1.2