This option changes the default clockevent/clocksource to PWM Timer, and is required by Loongson1 CPUFreq support. If unsure, say N.
Use PWM Timer 0 as the default clockevent/clocksourcer.
Use PWM Timer 1 as the default clockevent/clocksourcer.
Use PWM Timer 2 as the default clockevent/clocksourcer.
Use PWM Timer 3 as the default clockevent/clocksourcer.