On Fri, Dec 5, 2014 at 12:00 PM, Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> wrote: > The audio subsystem on Exynos 5420 has separate clocks and GPIO. To > operate properly on GPIOs the main block clock 'mau_epll' must be > enabled. > > This was observed on Peach Pi/Pit and Arndale Octa (after enabling i2s0) > after introducing runtime PM to pl330 DMA driver. After that commit the > 'mau_epll' was gated, because the "amba" clock was disabled and there > were no more users of mau_epll. > > The system hang just before probing i2s0 because > samsung_pinmux_setup() tried to access memory from audss block which was > gated. > > Add a clock property to the pinctrl driver and enable the clock during > GPIO setup. During normal GPIO operations (set, get, set_direction) the > clock is not enabled. > > Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> > Tested-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx> Tomasz, is this OK and should I apply it for fixes or next? Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
