Jingoo Han wrote:
> + .pwm_period_ns = 1000,
I will explain how I get the value of PWM period.
The SMDK boards use LT3591 as backlight LED driver of LTE480WV LCD
According to the LT3591 datasheet, the switching frequency should
be 1MHz. So, PWM period is calculated by following formula:
PWM period = 1/switching frequency
= 1/1MHz
= 1000 ns
You can find LT3591 datasheet easily on the Internet. Please refer to it
for more information.
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