Only a select set of modes (function, action, etc.) are valid for a
given device configuration. This patch ensures that invalid modes result
in a return -EINVAL. Such a situation should never occur in reality, but
it's good to define a default switch cases for the sake of making the
intent of the code clear.
Cc: Kamel Bouhara <kamel.bouhara@xxxxxxxxxxx>
Cc: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
Cc: Alexandre Torgue <alexandre.torgue@xxxxxx>
Cc: David Lechner <david@xxxxxxxxxxxxxx>
Acked-by: Syed Nayyar Waris <syednwaris@xxxxxxxxx>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@xxxxxxxxxxx>
Signed-off-by: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
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