Hi Paul,
> Am 05.07.2019 um 18:10 schrieb Paul Boddie <[email protected]>:
>
> On Friday 14. June 2019 11.13.16 H. Nikolaus Schaller wrote:
>>
>> And it should not be too difficult to find the relevant patches and
>> forward-port them to mainline or simply add the missing LED nodes to the
>> ci20.dts. I'll give it a try in the next days.
>
> I looked into this with the 5.1.8 kernel. The following configuration
> settings
> are required:
>
> CONFIG_LEDS_CLASS=y
> CONFIG_LEDS_GPIO=y
> CONFIG_LEDS_TRIGGERS=y
> CONFIG_LEDS_TRIGGER_MTD=y
> CONFIG_LEDS_TRIGGER_CPU=y
>
> With the device tree file, the following from 3.18 seems to be necessary
> under
> the / node:
>
> leds {
> compatible = "gpio-leds";
> led3 {
> gpios = <&gpc 0 0>;
> linux,default-trigger = "cpu0";
> };
> led2 {
> gpios = <&gpc 1 0>;
> linux,default-trigger = "cpu1";
> };
> led1 {
> gpios = <&gpc 2 0>;
> linux,default-trigger = "nand-disk";
> };
> led0 {
> gpios = <&gpc 3 0>;
> linux,default-trigger = "mmc0";
> };
> };
>
> With this, I can get led3 (cpu0) and led0 (mmc0) working. Maybe led1 (nand-
> disk) works if the NAND flash is accessed, but I don't use it. The led0
> assignment could have been done as follows:
>
> sudo sh -c "echo 'mmc0' > /sys/class/leds/led0/trigger"
It seems that I have forgotten to announce that I have added similar patches in
5.2-rc5 a while
ago to get the LEDs blink - and (untested) Infrared support:
http://git.goldelico.com/?p=letux-kernel.git;a=shortlog;h=refs/heads/letux/dt-ci20
http://git.goldelico.com/?p=letux-kernel.git;a=shortlog;h=refs/heads/letux/mips_defconfig
I did not yet backport to letux-4.19.x or letux-5.1.x. It was too low prio on
my to-do list
to get done.
So I too your mail as a reminder and just have prepared it and it will appear
with the next
stable release build of LetuxOS kernels. You will get a letux-5.1.17 tree soon.
>
> Another thing with 5.1.8 is that the second core in the CPU (cpu1) is not
> active.
Oh really! I think there is no cpufreq-info driver for the jz4780 so I did not
yet
notice.
> I don't know how that got broken: it's probably the usual breaking up
> of functionality into morsels that upstream might like, with the rest getting
> dumped over the side.
This is something to discuss on the mips-creator mailing list.
BR and thanks,
Nikolaus
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