I cannot find pinctrl for gpio mux selecting in kvim3_linux.dts

VIM3
#1

I want to change mux mode of gpio for

I need multiple GPIOs. So we want to modify dts to modify the mux mode of the gpio pin.
But I don’t know what part to fix in kvim3_linux.dts.
Can you tell me which part I need to modify for gpio mux selectging?

#2

Which PINs you want to use?

#3

I need PIN29, PIN30, PIN31, PIN32,PIN32, PIN33 of VIM3

But it not GPIO,

I cant write 1 to these GPIO with /sys/class/gpio/gpioxxx .

so i want to change mux seleting fot these gpios.

Thanks

Regards

#4

These PINs are default configured as I2S, if you want to use them as normal GPIOs, you can edit the dts to disable I2S in auge_sound node.

#5

I deleted the auge_sound node with kvim3_linux.dtb and dtb.img and tried status =“disabled” in the auge_sound node.

I also modified kvim3_linux.dtb and also dtb.img. However, either way I can’t set it to gpio. its is not working as gpio.

Could you please tell me how to do it in more detail?

#6

I have another question.
at VIM3 , there are two dtb file , one is dtb.img , another is kvim3_linux.dtb

Which file should I use?

#7

Hello @Frank

Please help to check this issue.

#8

@debian

index 5183c62b27df..f6401be41679 100644
--- a/arch/arm64/boot/dts/amlogic/kvim3_linux.dts
+++ b/arch/arm64/boot/dts/amlogic/kvim3_linux.dts
@@ -571,6 +571,7 @@
        auge_sound {
                compatible = "amlogic, g12a-sound-card";
                aml-audio-card,name = "AML-AUGESOUND";
+        status = "disabled";
 
                //aml-audio-card,aux-devs = <&amlogic_codec>;
                /*for audio effect ,eqdrc */
@@ -978,6 +979,7 @@
                 * 4: spdifout_b;
                 */
                samesource_sel = <3>;
+        status = "disabled";
        };
 
        aml_tdmc: tdmc {
1 Like
#9

Okay. It work well.

Thanks you