pwm: meson: Use devm_clk_get_optional() to get the input clock

Simplify the code which fetches the input clock for a PWM channel by
using devm_clk_get_optional().
This comes with a small functional change: previously all errors except
EPROBE_DEFER were ignored. Now all other errors are also treated as
errors. If no input clock is present devm_clk_get_optional() will return
NULL instead of an error which matches the behavior of the old code.

Reviewed-by: Neil Armstrong <[email protected]>
Reviewed-by: Uwe Kleine-König <[email protected]>
Signed-off-by: Martin Blumenstingl <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>

0 files changed, 0 insertions, 0 deletions