The Preset Register (PR), Flag Register (FLAG), and Filter Clock Prescaler (PSC) have common usage patterns. Wrap up such usage into dedicated functions to improve code clarity. Link: https://lore.kernel.org/r/a2d663337bf2907e0283023c06b1ddcbb32f7f6d.1681753140.git.william.gray@linaro.org/ Signed-off-by: William Breathitt Gray <william.gray@linaro.org>