Hi Astrid,
On 7/3/23 09:53, Astrid Rost wrote:
Hello Jacek,
I am having problems with the PWM controller LP5024.
https://www.ti.com/product/LP5024
There is no such a calculation in the data-sheet like:
max_brightness = max_current / constant.
I also assume it is depending on the type of LEDs and circuit, which are
connected.
It supports two current modes: 25,5 mA and and 35 mA, both is to high
for the LEDs I have.
For max_brightness seems to be everything inside the kernel, but reading
the value from devicetree. I first thought I could add it in the lp50xx
driver, but Andy and Rob thought that I better put it into the general
parts. And of course drivers having led-max-microamp should better use it.
Please, let me know if you have a better suggestion.
OK, since this LED controller is PWM-driven then there is no current per
brightness level granulation. Bindings of leds-pwm driver also use
max-brightness DT property. So, yeah, let's make it a common property,
but state clearly that it is mainly for drivers like PWM ones, where it
is not possible to map brightness level to the amount of current.
--
Best regards,
Jacek Anaszewski
