- compatible : shall be one of the following:
"via,vt8500-pll-clock" - for a VT8500/WM8505 PLL clock
"wm,wm8650-pll-clock" - for a WM8650 PLL clock
+ "wm,wm8750-pll-clock" - for a WM8750 PLL clock
+ "wm,wm8850-pll-clock" - for a WM8850 PLL clock
"via,vt8500-device-clock" - for a VT/WM device clock
Required properties for PLL clocks: