On Fri, Jan 31, 2020 at 12:20:03PM +0100, Krzysztof Kozlowski wrote: > On Fri, 31 Jan 2020 at 11:37, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> wrote: > > > > The bootloader on Odroid U2/X2/U3 boards configures main ARM clock to > > 1GHz. During the system shutdown procedure Linux kernel selects so called > > 'suspend-opp' for the CPU cores, what means that ARM clock is set to > > 800MHz and the CPU supply voltage is adjusted to that value. PMIC > > configuration is preserved during the board reboot. Later when the > > bootloader tries to enter the 1GHz mode, the voltage value configured by > > the kernel might be not high enough for the CPU to operate stable. This > > depends on the individual physical properties of each SoC (usually it is > > related to the production series) and varies between the boards. > > Typically most of the Odroid U3 boards work fine, while most of the U2 > > and X2 hangs during the reboot. > > > > This commit switches suspend-opp to 1GHz for the Odroid U2/X2/U3 boards, > > what finally fixes this issue. > > > > Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> > > --- > > arch/arm/boot/dts/exynos4412-odroid-common.dtsi | 9 +++++++++ Thanks, applied. Best regards, Krzysztof
