On 10/2/25 10:22 AM, Yegor Yefremov wrote:
Hi Simon and Marek,
On Wed, Oct 1, 2025 at 1:09 AM Simon Glass <[email protected]> wrote:
Hi Yegor,
On Tue, 30 Sept 2025 at 08:48, Yegor Yefremov
<[email protected]> wrote:
Hi Simon,
On Tue, Sep 30, 2025 at 4:13 PM Simon Glass <[email protected]> wrote:
Hi Yegor,
On Tue, 30 Sept 2025 at 06:35, Yegor Yefremov
<[email protected]> wrote:
On Tue, Sep 30, 2025 at 12:29 PM Yegor Yefremov
<[email protected]> wrote:
Hi all,
I added the following LED definition to the am335x-baltos.dts:
leds {
pinctrl-names = "default";
pinctrl-0 = <&user_leds>;
compatible = "gpio-leds";
led-power {
label = "led-red";
gpios = <&gpio3 0 GPIO_ACTIVE_LOW>;
default-state = "on";
};
};
user_leds: user-leds-pins {
pinctrl-single,pins = <
AM33XX_PADCONF(AM335X_PIN_MII1_COL,
PIN_OUTPUT_PULLDOWN, MUX_MODE7) /* mii1_col.gpio3_0 PWR LED */
>;
};
The gpio-leds driver is working and I can toggle the led-red via the
led command.
Then, I created an am335x-baltos-u-boot.dtsi file with the following content:
/ {
config {
u-boot,activity-led = "led-red";
};
};
I have also tried "led-power" instead of "led-red".
In my final DTS files I have the following nodes:
leds {
pinctrl-names = "default";
pinctrl-0 = <0x56>;
compatible = "gpio-leds";
led-power {
label = "led-red";
gpios = <0x57 0x00 0x01>;
default-state = "on";
};
};
config {
u-boot,activity-led = "led-red";
};
U-Boot cannot find the activity-led node.
ofnode_options_get_by_phandle("activity-led", &led_node); returns -22,
because ofnode_path("/options/u-boot") fails.
When driver debug is enabled, I also see the following messages:
bind node config
Device 'config' has no compatible string
My am335x-baltos-u-boot.dtsi code is similar to what I could find in
arch/arm/dts for the boot-led usage.
Where should I debug further?
It is a bit confusing as there is still 'legacy' LED stuff in the
tree. For your problem I would suggest checking that the LED device is
configured correctly.
For sandbox in test.dts you can see:
options {
u-boot {
compatible = "u-boot,config";
boot-led = <&sandbox_led_green>;
activity-led = <&sandbox_led_red>;
...
};
};
Check that led_init() is being called in the LED uclass.
It is working now using your suggestion. Thanks.
Should activity-led be also mentioned in doc/device-tree-bindings/config.txt?
We should be using /options/u-boot for this[1]
This means, everything that can be found via the following command
won't work and should be removed?
grep -r --include='*.dts[i]' boot-led arch/arm/dts
Yes. I did a series to remove the legacy LED stuff last year but it
wasn't applied because people wanted me to do more, probably what you
are looking at doing now :-)
This would be great if this patch series could be merged. Marek has a
board (arch/arm/dts/stm32mp157a-dhcor-avenger96-u-boot.dtsi) that can
be reworked too.
AFAIK, led_activity_blink() is used very seldom. For example, in
cmd/ubi.c it is only used for writing [1]. mmc is omitted completely.
Is this intentional or is this functionality just missing?
[1] https://github.com/u-boot/u-boot/blob/master/cmd/ubi.c#L494
As far as I understand it, the series was incomplete ?
--
Best regards,
Marek Vasut
