[PATCH v2 3/7] ARM: dts: kirkwood: gpio-leds fixes for linkstation ls-wxl/wsxl

[Roger Shimizu]

On Thu, Jan 21, 2016 at 2:16 AM, Andrew Lunn <andrew at lunn.ch> wrote:
> On Thu, Jan 21, 2016 at 12:33:54AM +0900, Roger Shimizu wrote:
>> Make all leds initially to "off" state except power indicator, so pins below
>> change from active_low to active_high:
>
> So what happens when you echo 1 to /sys/class/led/lswxl:red:func/brightness ?
>
> 1 should turn the LED on, 0 off. This is what
> GPIO_ACTIVE_LOW/GPIO_ACTIVE_HIGH is about, and these are independent
> of the initial off/on state.

after reboot,
# cat /sys/class/leds/lswxl\:red\:func/brightness
0
# echo 1 > /sys/class/leds/lswxl\:red\:func/brightness

1st command shows the initial value is 0.
2nd command will turn the LED to on state.

I guess board will set the value to 0 when boot, so as
GPIO_ACTIVE_LOW/GPIO_ACTIVE_HIGH can change the initial state of LED.

Cheers,
Roger