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PLLs are composed of multiple channels. Each channel outputs one clock signal. They are modeled as one device taking the PLL generated clock as input, and outputting a new clock. A channel shares the CM register with its parent PLL, and has its own A2W_CTRL register. A write to the CM register will trigger an update of the PLL and all its channels, while a write to an A2W_CTRL channel register will update the required channel only. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Luc Michel <luc@lmichel.fr> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>