Can't set GPIO default value

[liteblue]

Hello NVIDIA,
我遇到个问题，感觉这个GPIO默认值不受控制，我在Linux_for_Tegra\bootloader\generic\BCT\tegra234-mb1-bct-pinmux-p3767-dp-a03.dtsi 已经更改pinmux了，也在Linux_for_Tegra\bootloader\tegra234-mb1-bct-gpio-p3767-dp-a03.dtsi设置默认值了，我开机读寄存器感觉设置的不对：

希望是开机将PH.00设置输出为高，PG.06设置输出为低，都是双向高阻态
root@nv-desktop:/home/nv# busybox devmem 0x02434040
0x00000050
root@nv-desktop:/home/nv# busybox devmem 0x02434080
0x00000051
root@nv-desktop:/home/nv# gpioinfo |grep PH.00
line 43: “PH.00” unused output active-high
root@nv-desktop:/home/nv# gpioinfo |grep PG.06
line 41: “PG.06” unused output active-high
root@nv-desktop:/home/nv#
root@nv-desktop:/home/nv# cat /sys/kernel/debug/gpio|grep “PH.00”
gpio-391 (PH.00 )
root@nv-desktop:/home/nv# cat /sys/kernel/debug/gpio|grep “PG.06”
gpio-389 (PG.06 )

我用配寄存器的方式试过，必须高阻态+内部上下拉才能正确点亮熄灭

root@nv-desktop:/home/nv# busybox devmem 0x02434040 w 0x54
root@nv-desktop:/home/nv# busybox devmem 0x02434040 w 0x58

root@nv-desktop:/home/nv# busybox devmem 0x02434080 w 0x54
root@nv-desktop:/home/nv# busybox devmem 0x02434080 w 0x58

DTS config:

                        soc_gpio19_pg6 {
                                nvidia,pins = "soc_gpio19_pg6";
                                nvidia,function = "rsvd1";
                                nvidia,pull = <TEGRA_PIN_PULL_NONE>;
                                nvidia,tristate = <TEGRA_PIN_ENABLE>;
                                nvidia,enable-input = <TEGRA_PIN_ENABLE>;
                                nvidia,lpdr = <TEGRA_PIN_DISABLE>;
                        };
                        soc_gpio21_ph0 {
                                nvidia,pins = "soc_gpio21_ph0";
                                nvidia,function = "rsvd0";
                                nvidia,pull = <TEGRA_PIN_PULL_NONE>;
                                nvidia,tristate = <TEGRA_PIN_ENABLE>;
                                nvidia,enable-input = <TEGRA_PIN_ENABLE>;
                                nvidia,lpdr = <TEGRA_PIN_DISABLE>;
                        };

excel config:

目前的问题：

1. 为什么dts配置后，默认值不对？
2. gpioset也感觉不受控制，设置后，用devmem读寄存器值没变

root@nv-desktop:/home/nv# gpioset --mode=wait `gpiofind 'PG.06'`=0

root@nv-desktop:/home/nv# gpioset --mode=wait `gpiofind 'PG.06'`=1

root@nv-desktop:/home/nv# 
root@nv-desktop:/home/nv# 
root@nv-desktop:/home/nv# busybox devmem 0x02434080
0x00000451

[JerryChang]

hello liteblue,

may I know which Jetpack release version you’re working with?
and… the board SKU of your Orin NX?

[liteblue]

@JerryChang

SKU

My BSP package version is jetpack6.0 ， r36.3.

Board ID(3767) version(301) sku(0000) revision(G.1)
Chip SKU(00:00:00:D3) ramcode(00:00:00:01) fuselevel(fuselevel_production) board_FAB(301)

[JerryChang]

please see-also Topic 301171 to apply the patch for verification.

[liteblue]

Hi Jerry,
应用补丁后gpio工具不会导致pinmux变化了，但是gpioget好像得到的值与实际测量不同，以下set为0后，读到的是1，实际测量刚开始是0V，随后几秒后变成1.2V。
gpioget gpiofind 'PCC.01'
1

怎么读GPIO寄存器的？我可以看下是不是被正确改了

[liteblue]

Hi Jerry,
应用补丁后gpio工具不会导致pinmux变化了，但是gpioget好像得到的值与实际测量不同，以下set为0后，读到的是1，实际测量刚开始是0V，随后几秒后变成1.2V。

gpioget `gpiofind 'PCC.01'`
1

gpioset为1后，退出gpioset程序，会在十多秒后从1.8V降到1.2V。

pinmux始终未变化

# busybox devmem 0x0c302050
0x00000041

对应GPIO寄存器怎么查找的？我可以看下是不是被正确改了

[JerryChang]

hello liteblue,

(1) please set the GPIO with --mode=wait for keeping its state.
(2) pinmux it’s the default settings of bpmp, it’s not used by kernel stage.