Hi, On Mon, May 09, 2016 at 04:07:35PM -0500, Rob Herring wrote: > There's already a pwm-led binding that can be used. Though there > may be missing consumer IR to LED subsystem support in the kernel. > You could list both compatibles, use the rx51 IR driver now, and > then move to pwm-led driver in the future. Well from a purely HW point of view it's a PWM connected led. The usage is completely different though. Usually PWM is used to control the LED's brightness via the duty cycle (basic concept: enabling led only 50% of time reduces brightness to 50%). In the IR led's case the aim is generating a specific serial pattern instead. For this task it uses a dmtimer in PWM mode and a second one to reconfigure the pwm timer. I don't know about a good name, but rx51 should be replaced with n900 in the compatible string. So maybe "nokia,n900-infrared-diode". -- Sebastian
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