On Thu, Mar 23, 2017 at 09:37:49PM +0100, Pavel Machek wrote: > Hi! > > > The Light Pulse Generator (LPG) is a PWM-block found in a wide range of > > PMICs from Qualcomm. It can operate on fixed parameters or based on a > > lookup-table, altering the duty cycle over time - which provides the > > means for e.g. hardware assisted transitions of LED brightness. > > Ok, this is not first hardware that supports something like this. We > have similar hardware that can do blinking on Nokia N900 -- please > take a look at leds-lp55*.c And perhaps some alignment on the bindings too if the N900 has bindings. > And it would be really good to provide hardware abstraction. We really > don't want to have different userspace for LPG and for N900 and for I'm interested in what this looks like as several AOSP platforms do tri-color LEDs with custom sysfs extensions. Do any of the Dragonboards have tri-color LEDs? Rob
