GPIO H-I / gpiochip7-gpiochip8 Doesn't work

[RSTurgay]

Hi,

I am using NuMaker-IoT-MA35D16F90-V2 Kit. I booting kernel on SD. There is no problem here. I want to use Raspberry Pi Connector. Raspberry Pi connector has a few H and I ports. But I write to pin PH0-PH1-PH2-PH3 and has no effect. Pins are always high. I write doesnt work on Pin. I try another pins PG4-PG5-PG6. it is work. I using tools are sysfs, libgiod and python-periphery. Same result in all.

# gpiodetect
gpiochip0 [gpioa] (16 lines)
gpiochip1 [gpiob] (16 lines)
gpiochip10 [gpiok] (16 lines)
gpiochip11 [gpiol] (16 lines)
gpiochip12 [gpiom] (16 lines)
gpiochip13 [gpion] (16 lines)
gpiochip2 [gpioc] (16 lines)
gpiochip3 [gpiod] (16 lines)
gpiochip4 [gpioe] (16 lines)
gpiochip5 [gpiof] (16 lines)
gpiochip6 [gpiog] (16 lines)
gpiochip7 [gpioh] (16 lines)
gpiochip8 [gpioi] (16 lines)
gpiochip9 [gpioj] (16 lines)

Also I changes effect this place.

# gpioinfo
gpiochip0 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip1 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused  output  active-high
        line   9:      unnamed       unused  output  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip10 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip11 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip12 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip13 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed   "Key Down"   input   active-low [used]
        line   3:      unnamed     "Key Up"   input   active-low [used]
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       "LED0"  output   active-low [used]
        line   7:      unnamed       "LED1"  output   active-low [used]
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       "LED2"  output   active-low [used]
        line  11:      unnamed "volt1_sdhci1" output active-high [used]
        line  12:      unnamed   "Key Left"   input   active-low [used]
        line  13:      unnamed  "Key Right"   input   active-low [used]
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip2 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused  output  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip3 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed  "powerdown"  output  active-high [used]
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip4 - 16 lines:
        line   0:      unnamed       kernel   input  active-high [used]
        line   1:      unnamed       kernel   input  active-high [used]
        line   2:      unnamed       kernel   input  active-high [used]
        line   3:      unnamed       kernel   input  active-high [used]
        line   4:      unnamed       kernel   input  active-high [used]
        line   5:      unnamed       kernel   input  active-high [used]
        line   6:      unnamed       kernel   input  active-high [used]
        line   7:      unnamed       kernel   input  active-high [used]
        line   8:      unnamed       kernel   input  active-high [used]
        line   9:      unnamed       kernel   input  active-high [used]
        line  10:      unnamed       kernel   input  active-high [used]
        line  11:      unnamed       kernel   input  active-high [used]
        line  12:      unnamed       kernel   input  active-high [used]
        line  13:      unnamed       kernel   input  active-high [used]
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip5 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip6 - 16 lines:
        line   0:      unnamed       kernel  output  active-high [used]
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused  output  active-high
        line   5:      unnamed       unused  output  active-high
        line   6:      unnamed       unused  output  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       kernel   input  active-high [used]
        line   9:      unnamed       kernel   input  active-high [used]
        line  10:      unnamed       kernel   input  active-high [used]
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip7 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip8 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high
gpiochip9 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed       unused   input  active-high
        line   3:      unnamed       unused   input  active-high
        line   4:      unnamed         "wp"   input   active-low [used]
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high

I check sysfs gpio

# echo 114 >/sys/class/gpio/export
# echo out >/sys/class/gpio/gpio114/direction
# echo 1 >/sys/class/gpio/gpio114/value
# cat /sys/class/gpio/gpio114/value
1
# echo 0 >/sys/class/gpio/gpio114/value
# cat /sys/class/gpio/gpio114/value
1

# echo 115 >/sys/class/gpio/export
# echo out >/sys/class/gpio/gpio115/direction
# echo 1 >/sys/class/gpio/gpio115/value
# cat /sys/class/gpio/gpio115/value
1
# echo 0 >/sys/class/gpio/gpio115/value
# cat /sys/class/gpio/gpio115/value
1

I check this table.

gpiochip7 - 16 lines:
        line   0:      unnamed       unused   input  active-high
        line   1:      unnamed       unused   input  active-high
        line   2:      unnamed      "sysfs"  output  active-high [used]
        line   3:      unnamed      "sysfs"  output  active-high [used]
        line   4:      unnamed       unused   input  active-high
        line   5:      unnamed       unused   input  active-high
        line   6:      unnamed       unused   input  active-high
        line   7:      unnamed       unused   input  active-high
        line   8:      unnamed       unused   input  active-high
        line   9:      unnamed       unused   input  active-high
        line  10:      unnamed       unused   input  active-high
        line  11:      unnamed       unused   input  active-high
        line  12:      unnamed       unused   input  active-high
        line  13:      unnamed       unused   input  active-high
        line  14:      unnamed       unused   input  active-high
        line  15:      unnamed       unused   input  active-high

When I check the schematic, there is no connection anywhere. But I can't use it. Why can't I use it? I would be very happy if you could help me with this subject. Thank you for your interest.

[ychuang3]

It has been confirmed that the GPIO failure was caused by u-boot enabling display, which modifies MFP of many GPIOs including H and I. To fix this issue, we have disabled u-boot display by default and updated it on GitHub. Please update your u-boot version.