This patchset fixes mysterious boot hang on Exynos 4210 SoCs, when IOMMU is enabled. There is no direct dependency between IOMMU devices and MDMA1. However enabling IOMMU changes the device probe order, what results in LCD0 power domain being turned off for some time. During that time the registration of MDMA1 device happens, what results in system hangs, because the common bus code tries to read PID/CID registers from turned-off device. The first patch adds support for enabling power domain during AMBA device registration process, which require access to device's registers to read PID/CID values. The second assigns MDMA1 device on Exynos 4210 to proper power domain. Best regards Marek Szyprowski Samsung R&D Institute Poland Patch summary: Marek Szyprowski (2): drivers: amba: properly handle devices with power domains ARM: dts: exynos4210: MDMA1 device belongs to LCD0 power domain arch/arm/boot/dts/exynos4210.dtsi | 4 ++++ drivers/amba/bus.c | 7 +++++++ 2 files changed, 11 insertions(+) -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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