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Enable cpuidle driver on XU3/4 #357

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Enable cpuidle driver on XU3/4 #357

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a55373b
arm: exynos: Add odroid xu3/4 to cpuidle driver
Emerald-Phoenix Jun 27, 2018
b68fdeb
config: odroid xu3/4: Remove coupled cpuidle from config
Emerald-Phoenix Jun 27, 2018
6028508
cpuidle: exynos: Setup idle state for odroid xu3/4
Emerald-Phoenix Jun 27, 2018
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2 changes: 1 addition & 1 deletion arch/arm/configs/odroidxu4_defconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -720,7 +720,7 @@ CONFIG_CPU_IDLE_GOV_MENU=y
# CONFIG_ARM_CPUIDLE is not set
# CONFIG_ARM_BIG_LITTLE_CPUIDLE is not set
CONFIG_ARM_EXYNOS_CPUIDLE=y
CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED=y
# CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED is not set

#
# Floating point emulation
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5 changes: 4 additions & 1 deletion arch/arm/mach-exynos/exynos.c
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Expand Up @@ -199,7 +199,10 @@ static void __init exynos_dt_machine_init(void)
(of_machine_is_compatible("samsung,exynos4412") &&
of_machine_is_compatible("samsung,trats2")) ||
of_machine_is_compatible("samsung,exynos3250") ||
of_machine_is_compatible("samsung,exynos5250"))
of_machine_is_compatible("samsung,exynos5250") ||
of_machine_is_compatible("hardkernel,odroid-xu3") ||
of_machine_is_compatible("hardkernel,odroid-xu3-lite") ||
of_machine_is_compatible("hardkernel,odroid-xu4"))
platform_device_register(&exynos_cpuidle);
}

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24 changes: 23 additions & 1 deletion drivers/cpuidle/cpuidle-exynos.c
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Expand Up @@ -76,6 +76,21 @@ static int exynos_enter_lowpower(struct cpuidle_device *dev,
return new_index;
}

static struct cpuidle_driver exynos_idle_driver_5422 = {
.name = "exynos_idle",
.owner = THIS_MODULE,
.states = {
[0] = {
.enter = arm_cpuidle_simple_enter,
.exit_latency = 1,
.target_residency = 500,
.name = "WFI",
.desc = "ARM clock gating",
},
},
.state_count = 1,
};

static struct cpuidle_driver exynos_idle_driver = {
.name = "exynos_idle",
.owner = THIS_MODULE,
Expand Down Expand Up @@ -125,7 +140,14 @@ static int exynos_cpuidle_probe(struct platform_device *pdev)
} else {
exynos_enter_aftr = (void *)(pdev->dev.platform_data);

ret = cpuidle_register(&exynos_idle_driver, NULL);
if (of_machine_is_compatible("hardkernel,odroid-xu3") ||
of_machine_is_compatible("hardkernel,odroid-xu3-lite") ||
of_machine_is_compatible("hardkernel,odroid-xu4")) {

ret = cpuidle_register(&exynos_idle_driver_5422, NULL);
} else {
ret = cpuidle_register(&exynos_idle_driver, NULL);
}
}

if (ret) {
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