A recent rt5640 codec update requires mclk definition in the device tree. Without mclk defined sound will not work. Robert Eckelmann (1): ARM: tegra: nexus7: add missing clock binding into sound node .../boot/dts/nvidia/tegra30-asus-nexus7-grouper-common.dtsi | 3 +++ 1 file changed, 3 insertions(+) -- 2.40.1