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| author | Vincent Donnefort <vdonnefort@gmail.com> | 2015-10-23 12:59:58 +0200 |
|---|---|---|
| committer | Gregory CLEMENT <gregory.clement@free-electrons.com> | 2015-10-23 17:34:37 +0200 |
| commit | 9d2ea95a599a80b08cc802f044626ea2701aade9 (patch) | |
| tree | a2b63533bdcf5dea8d9560ef6a38b071ea99bcc5 /arch/arm | |
| parent | 4904dbda41c860fd117b20f3c48adb2780eee37e (diff) | |
| download | linux-stable-9d2ea95a599a80b08cc802f044626ea2701aade9.tar.gz linux-stable-9d2ea95a599a80b08cc802f044626ea2701aade9.tar.bz2 linux-stable-9d2ea95a599a80b08cc802f044626ea2701aade9.zip | |
ARM: mvebu: add broken-idle option
The broken-idle option can be activated from the coherency-fabric DT
node. This property allows to disable the idle capability, when the
hardware doesn't support it, like the Seagate Personal Cloud boards.
Signed-off-by: Vincent Donnefort <vdonnefort@gmail.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-mvebu/pmsu.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/arch/arm/mach-mvebu/pmsu.c b/arch/arm/mach-mvebu/pmsu.c index e8fdb9ceedf0..867ec3385eb5 100644 --- a/arch/arm/mach-mvebu/pmsu.c +++ b/arch/arm/mach-mvebu/pmsu.c @@ -379,6 +379,16 @@ static struct notifier_block mvebu_v7_cpu_pm_notifier = { static struct platform_device mvebu_v7_cpuidle_device; +static int broken_idle(struct device_node *np) +{ + if (of_property_read_bool(np, "broken-idle")) { + pr_warn("CPU idle is currently broken: disabling\n"); + return 1; + } + + return 0; +} + static __init int armada_370_cpuidle_init(void) { struct device_node *np; @@ -387,7 +397,9 @@ static __init int armada_370_cpuidle_init(void) np = of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric"); if (!np) return -ENODEV; - of_node_put(np); + + if (broken_idle(np)) + goto end; /* * On Armada 370, there is "a slow exit process from the deep @@ -406,6 +418,8 @@ static __init int armada_370_cpuidle_init(void) mvebu_v7_cpuidle_device.dev.platform_data = armada_370_xp_cpu_suspend; mvebu_v7_cpuidle_device.name = "cpuidle-armada-370"; +end: + of_node_put(np); return 0; } @@ -422,6 +436,10 @@ static __init int armada_38x_cpuidle_init(void) "marvell,armada-380-coherency-fabric"); if (!np) return -ENODEV; + + if (broken_idle(np)) + goto end; + of_node_put(np); np = of_find_compatible_node(NULL, NULL, @@ -430,7 +448,6 @@ static __init int armada_38x_cpuidle_init(void) return -ENODEV; mpsoc_base = of_iomap(np, 0); BUG_ON(!mpsoc_base); - of_node_put(np); /* Set up reset mask when powering down the cpus */ reg = readl(mpsoc_base + MPCORE_RESET_CTL); @@ -450,6 +467,8 @@ static __init int armada_38x_cpuidle_init(void) mvebu_v7_cpuidle_device.dev.platform_data = armada_38x_cpu_suspend; mvebu_v7_cpuidle_device.name = "cpuidle-armada-38x"; +end: + of_node_put(np); return 0; } @@ -460,12 +479,16 @@ static __init int armada_xp_cpuidle_init(void) np = of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric"); if (!np) return -ENODEV; - of_node_put(np); + + if (broken_idle(np)) + goto end; mvebu_cpu_resume = armada_370_xp_cpu_resume; mvebu_v7_cpuidle_device.dev.platform_data = armada_370_xp_cpu_suspend; mvebu_v7_cpuidle_device.name = "cpuidle-armada-xp"; +end: + of_node_put(np); return 0; } |