Cannot set GPIO05 output-pulldown in the cboot

Xzz · April 25, 2023, 7:17am

My pinmux spreadsheet set is here:

After that, I use pinmux-dts2cfg.py to update my BCT cfg:

diff --git a/bootloader/t186ref/BCT/tegra19x-mb1-pinmux-p3668-a01.cfg b/bootloader/t186ref/BCT/tegra19x-mb1-pinmux-p3668-a01.cfg
index 09ff5d8..da7aa27 100644
--- a/bootloader/t186ref/BCT/tegra19x-mb1-pinmux-p3668-a01.cfg
+++ b/bootloader/t186ref/BCT/tegra19x-mb1-pinmux-p3668-a01.cfg
@@ -2,7 +2,7 @@
 ## Pinmux version 1.6
 ## Input pinmux file name: tegra19x-jetson_xavier_nx_module-pinmux.dtsi
 ## Input gpio file name: tegra19x-jetson_xavier_nx_module-gpio-default.dtsi
-## Generation date: 2023-04-10 16:30
+## Generation date: 2023-04-25 14:26
 ## PLEASE DO NOT EDIT THIS FILE
 ## This is autogenerated file using the script pinmux-dts2cfg.py
 ##
@@ -86,10 +86,6 @@ pinmux.0x0c2f1200 = 0x00000003; # CONFIG CC0
 pinmux.0x0c2f120c = 0x00000000; # CONTROL CC0
 pinmux.0x0c2f1210 = 0x00000000; # OUTPUT CC0
 pinmux.0x0c302048 = 0x00000000; # GPIO spi2_sck_pcc0
-pinmux.0x0c2f1240 = 0x00000003; # CONFIG CC2
-pinmux.0x0c2f124c = 0x00000000; # CONTROL CC2
-pinmux.0x0c2f1250 = 0x00000000; # OUTPUT CC2
-pinmux.0x0c302028 = 0x00000000; # GPIO spi2_mosi_pcc2
 pinmux.0x0c2f1260 = 0x00000003; # CONFIG CC3
 pinmux.0x0c2f126c = 0x00000000; # CONTROL CC3
 pinmux.0x0c2f1270 = 0x00000000; # OUTPUT CC3
@@ -226,7 +222,7 @@ pinmux.0x0c301038 = 0x00000058; # power_on_pee4: rsvd0, pull-up, tristate-enable
 pinmux.0x0c303028 = 0x0000c000; # can0_en_paa5: rsvd0, tristate-disable, input-disable
 pinmux.0x0c302048 = 0x00000002; # spi2_sck_pcc0: rsvd2, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
 pinmux.0x0c302050 = 0x00000002; # spi2_miso_pcc1: rsvd2, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
-pinmux.0x0c302028 = 0x00000002; # spi2_mosi_pcc2: rsvd2, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
+pinmux.0x0c302028 = 0x00000406; # spi2_mosi_pcc2: rsvd2, pull-down, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
 pinmux.0x0c302038 = 0x00000002; # spi2_cs0_pcc3: rsvd2, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
 pinmux.0x0c302000 = 0x00000056; # touch_clk_pcc4: rsvd2, pull-down, tristate-enable, input-enable, lpdr-disable

But when booting up, GPIO05 is not pulled down.
And I read the port, the result is not the same to the above cfg:

root@tegra-ubuntu:~#  cat /sys/kernel/debug/tegra_pinctrl_reg | grep 0x0c302028
Bank: 1 Reg: 0x0c302028 Val: 0x00000006 -> spi2_mosi_pcc2

KevinFFF · April 25, 2023, 8:21am

Hi Xzz,

Why you configure this pin as “GPIO_PCC.02” instead of SPI use?
Do you want use this pin as GPIO or SPI interface (MOSI)?

Xzz · April 25, 2023, 8:24am

Hi，KevinFFF，
Actually there is only two options

And I want use this pin as GPIO

KevinFFF · April 25, 2023, 9:52am

The default one for “GPIO05” is showed as SPI2_MOSI, which is expected to be used.
If you don’t want to use SPI function and use GPIO instead, please set all SPI2 related pins to GPIO in pinmux table.

Xzz · April 26, 2023, 1:23am

Hi,KevinFFF,

I found that the default GPIO5 is set to GPIO3_PCC.02 .
And there are only two options in the picture, no options related to SPI were found
So I’m confused where the SPI related settings are

What’s more, all SPI2 related pin are GPIO in default.

Xzz · April 27, 2023, 6:16am

Hi,KevinFFF,
And I find a question:
What I set pinmux in the BSP was 0x00000406:

-pinmux.0x0c302028 = 0x00000002; # spi2_mosi_pcc2: rsvd2, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable
+pinmux.0x0c302028 = 0x00000406; # spi2_mosi_pcc2: rsvd2, pull-down, tristate-disable, input-disable, io_high_voltage-disable, lpdr-disable

But I read 0x00000006 in the system:

Why these two result defferent?
This is my flash method:
sudo ./flash.sh jetson-xavier-nx-devkit-emmc mmcblk0p1

KevinFFF · April 27, 2023, 7:00am

0x00000406 => For SFIO
0x00000006 => For GPIO

It seems that you want to use these SPI related pins as GPIO, so please set 0x0c302028 to 0x00000006(GPIO, pull down).

Xzz · April 28, 2023, 2:26am

So you mean My config is right?
But GPIO05 is pull up when booting up now.
I want it pull down.

KevinFFF · April 28, 2023, 2:55am

Do you mean that you measure the GPIO05 after boot up and it is high now?

Xzz · April 28, 2023, 5:43am

yes, I measure it when power on.

KevinFFF · April 28, 2023, 9:40am

I mean the time after boot up, not after power on.
What’s the state of GPIO.05 after you boot up and enter into the desktop?

Xzz · May 4, 2023, 6:48am

Hi，KevinFFF,
Sorry for reply late.
GPIO05 is high after boot up.

KevinFFF · May 5, 2023, 5:19am

Could you control GPIO05(PCC.02) through sysfs?

#echo 319 > /sys/class/gpio/export
#cat /sys/class/gpio/PCC.02/direction
#cat /sys/class/gpio/PCC.02/value

Xzz · May 5, 2023, 6:27am

Yes , I could.
I can control this GPIO in the kernel.
But I can’t control it before powering on to the kernel.

KevinFFF · May 7, 2023, 3:03am

It should be depending on the pinmux configuration.
Could you help to provide the pinmux spreadsheet as file here for further check?

Xzz · May 8, 2023, 2:34am

Sorry for late,
this is our Spread.
Jetson_Xavier_NX_Pinmux_Configuration_Template_v1.06-sx.rar (743.2 KB)

KevinFFF · May 8, 2023, 5:24am

Could you help to provide your device tree (dtb file) for further check?

Xzz · May 8, 2023, 7:33am

tegra194-p3668-all-p3509-0000.dtb (201.9 KB)

KevinFFF · May 8, 2023, 7:59am

Could you help to find if there’s the following node in your BSP package?

If yes, please help to disable it.

		w-disable1 {
			gpio-hog;
			output-high;
			gpios = <TEGRA194_AON_GPIO(CC, 2) GPIO_ACTIVE_LOW>;
			label = "w-disable1";
-			status = "okay";
+			status = "disabled";
		};

Xzz · May 8, 2023, 8:31am

Hi，
I have do this change before.

+++ b/hardware/nvidia/platform/t19x/jakku/kernel-dts/common/tegra194-p3668-common.dtsi
@@ -328,13 +328,13 @@
                        label = "pex_refclk_sel_high";
                        status = "disabled";
                };
-               w-disable1 {
-                       gpio-hog;
-                       output-high;
-                       gpios = <TEGRA194_AON_GPIO(CC, 2) GPIO_ACTIVE_LOW>;
-                       label = "w-disable1";
-                       status = "okay";
-               };
+               //w-disable1 {
+               //      gpio-hog;
+               //      output-high;
+               //      gpios = <TEGRA194_AON_GPIO(CC, 2) GPIO_ACTIVE_LOW>;
+               //      label = "w-disable1";
+               //      status = "okay";
+               //};

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Cannot set GPIO05 output-pulldown in the cboot

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