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Fabrice Gasnier authored
Analog clock input is mandatory on stm32f4. But newer version of ADC hardware block allow to select either bus clock or asynchronous clock, for analog circuitry. So, make it optional by default, but enforce clk presence on stm32f4. Signed-off-by:
Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by:
Jonathan Cameron <jic23@kernel.org>
9fd243c4