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authorJavier Martinez Canillas <javier@osg.samsung.com>2016-08-21 03:27:45 -0400
committerKrzysztof Kozlowski <k.kozlowski@samsung.com>2016-08-30 10:49:18 +0200
commitb030485220caf862c71db6fb8b8ad016ce7f7565 (patch)
tree2cab2e89758ecf0a616c2c3285585a74755cceb6 /arch
parent29617e1cfc2aa869154f5ed2580b756ec2c3cb28 (diff)
ARM: EXYNOS: Clear OF_POPULATED flag from PMU node in IRQ init callback
The Exynos PMU node is an interrupt, clock and PMU (Power Management Unit) controller, and these functionalities are supported by different drivers that matches the same compatible strings. Since commit 15cc2ed6dcf9 ("of/irq: Mark initialised interrupt controllers as populated") the OF core flags interrupt controllers registered with the IRQCHIP_DECLARE() macro as OF_POPULATED, so platform devices with the same compatible string as the interrupt controller will not be registered. This prevents the PMU platform device to be registered so the Exynos PMU driver is never probed. This breaks (among other things) Suspend-to-RAM. Fix this by clearing the OF_POPULATED flag in the PMU IRQ init callback, to allow the Exynos PMU platform driver to be probed. The patch is based on Philipp Zabel's "ARM: imx6: mark GPC node as not populated after irq init to probe pm domain driver". Fixes: 15cc2ed6dcf9 ("of/irq: Mark initialised interrupt controllers as populated") Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-exynos/suspend.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/suspend.c b/arch/arm/mach-exynos/suspend.c
index 3750575c73c5..06332f626565 100644
--- a/arch/arm/mach-exynos/suspend.c
+++ b/arch/arm/mach-exynos/suspend.c
@@ -255,6 +255,12 @@ static int __init exynos_pmu_irq_init(struct device_node *node,
return -ENOMEM;
}
+ /*
+ * Clear the OF_POPULATED flag set in of_irq_init so that
+ * later the Exynos PMU platform device won't be skipped.
+ */
+ of_node_clear_flag(node, OF_POPULATED);
+
return 0;
}