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According to Documentation/devicetree/bindings/iio/adc/vf610-adc.txt this is a recommended property. Signed-off-by: Fabio Estevam Acked-by: Fugang Duan --- arch/arm/boot/dts/imx6sx.dtsi | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi index 167f77b..da42566 100644 --- a/arch/arm/boot/dts/imx6sx.dtsi +++ b/arch/arm/boot/dts/imx6sx.dtsi @@ -1152,6 +1152,8 @@ interrupts = ; clocks = <&clks IMX6SX_CLK_IPG>; clock-names = "adc"; + fsl,adck-max-frequency = <30000000>, <40000000>, + <20000000>; status = "disabled"; }; @@ -1161,6 +1163,8 @@ interrupts = ; clocks = <&clks IMX6SX_CLK_IPG>; clock-names = "adc"; + fsl,adck-max-frequency = <30000000>, <40000000>, + <20000000>; status = "disabled"; };