linux-wandboard

MLK-16973-4 pwm: imx: Use ipg and per clks in ->config, ->enable and ->disable

For the i.MX8QM SoC, it turns out that both ipg and per clocks
are needed to be enabled when the PWM registers are configured.
Hence, we use the two clocks in the ->config, ->enable and
disable hooks.  For other SoCs unlike i.MX8QM, it could bring
some additional trivial power consumptions due to the additional
active ipg clock when PWM is enabled.

Signed-off-by: Liu Ying <victor.liu@nxp.com>