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SK-AM62: How to enable GPIO command in U-Boot?

Lie Koon Kee
Prodigy 80 points
Part Number: SK-AM62

Hi,

I downloaded the SDK from https://www.ti.com/tool/PROCESSOR-SDK-AM62X, which I can see the gpio.c command file in /board-support/u-boot/cmd. In order to enable the command in U-boot console, I set 'CONFIG_CMD_GPIO=y' in the config file I am using to build my uboot.img which is am62x_evm_a53_defconfig. Once I did that, I can see that gpio.c is compiled in my build but here's the error I found:

In this case, I believe I got the above errors because I am missing the driver gpio.c in this build. So I went to drivers/gpio to see that there are a lot of different gpio drivers in the folder which I have no idea which one is the exact gpio driver I should use. Can anyone please give some advice? 

Thanks,

Koon Kee

  • 0
    TI__Guru 69070 points

    Hello,
    I think GPIO command at u-boot is not fully enabled/tested on K3 SoC (including AM62x).
    Let me check internally, and keep you posted...
    Best,
    -Hong

  • 0 in reply to Hong Guan64
    TI__Guru 69070 points

    Hello,
    I'm attaching a log file on "gpio" cmd @u-boot I captured on AM62x-SK
    - The u-boot is based off SDK 8.6 release (www.ti.com/.../08.06.00.42)
    - a simple u-boot patch to enable "gpio" cmd
    Hopefully it is helpful for your user case.
    Best,
    -Hong

    https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/7043.am62x_5F00_gpio.patch

    Fullscreen 4137.am62x_8.6_gpio.log Download 
    U-Boot SPL 2021.01-00001-g45cb7e4-dirty (Mar 14 2023 - 22:58:17 -0500)
SYSFW ABI: 3.1 (firmware rev 0x0008 '8.6.4--v08.06.04 (Chill Capybar')
SPL initial stack usage: 13424 bytes
Trying to boot from MMC2
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Loading Environment from MMC... *** Warning - No MMC card found, using default environment

Starting ATF on ARM64 core...

NOTICE:  BL31: v2.8(release):v2.8-226-g2fcd408bb3-dirty
NOTICE:  BL31: Built : 05:06:58, Feb 24 2023

U-Boot SPL 2021.01-00001-g45cb7e4-dirty (Mar 14 2023 - 22:57:08 -0500)
SYSFW ABI: 3.1 (firmware rev 0x0008 '8.6.4--v08.06.04 (Chill Capybar')
Trying to boot from MMC2


U-Boot 2021.01-00001-g45cb7e4-dirty (Mar 14 2023 - 22:57:08 -0500)

SoC:   AM62X SR1.0 GP
Model: Texas Instruments AM625 SK
EEPROM not available at 0x50, trying to read at 0x51
Board: AM62-SKEVM rev E2
DRAM:  2 GiB
MMC:   mmc@fa10000: 0, mmc@fa00000: 1, mmc@fa20000: 2
Loading Environment from MMC... OK
In:    serial@2800000
Out:   serial@2800000
Err:   serial@2800000
Net:   eth0: ethernet@8000000port@1
Hit any key to stop autoboot:  2  0
=> dm tree
 Class     Index  Probed  Driver                Name
-----------------------------------------------------------
 root          0  [ + ]   root_driver           root_driver
 simple_bus    0  [ + ]   simple_bus            |-- bus@f0000
 simple_bus    1  [ + ]   simple_bus            |   |-- bus@4000000
 pinctrl       0  [ + ]   single-pinctrl        |   |   |-- pinctrl@4084000
 remoteproc    0  [   ]   k3_m4                 |   |   `-- m4fss@5000000
 simple_bus    2  [ + ]   simple_bus            |   |-- bus@2b000000
 syscon        0  [ + ]   syscon                |   |   `-- syscon@43000000
 soc           0  [ + ]   soc_ti_k3             |   |       `-- chipid@14
 syscon        1  [   ]   syscon                |   |-- syscon@100000
 simple_bus    3  [ + ]   simple_bus            |   |-- bus@48000000
 mailbox       0  [ + ]   k3-secure-proxy       |   |   |-- mailbox@4d000000
 dma           0  [   ]   ti-udma               |   |   |-- dma-controller@485c0100
 dma           1  [   ]   ti-udma               |   |   `-- dma-controller@485c0000
 firmware      0  [ + ]   ti_sci                |   |-- system-controller@44043000
 power_doma    0  [ + ]   ti-sci-pm-domains     |   |   |-- power-controller
 clk           0  [ + ]   ti-sci-clk            |   |   |-- clock-controller
 reset         0  [   ]   ti-sci-reset          |   |   |-- reset-controller
 sysreset      0  [   ]   ti-sci-sysreset       |   |   `-- sysreset-controller
 pinctrl       1  [ + ]   single-pinctrl        |   |-- pinctrl@f4000
 pinconfig     0  [ + ]   pinconfig             |   |   |-- main-uart0-pins-default
 pinconfig     1  [   ]   pinconfig             |   |   |-- main-i2c0-pins-default
 pinconfig     2  [   ]   pinconfig             |   |   |-- main-i2c1-pins-default
 pinconfig     3  [   ]   pinconfig             |   |   |-- main-i2c2-pins-default
 pinconfig     4  [ + ]   pinconfig             |   |   |-- main-mmc0-pins-default
 pinconfig     5  [ + ]   pinconfig             |   |   |-- main-mmc1-pins-default
 pinconfig     6  [   ]   pinconfig             |   |   |-- usr-led-pins-default
 pinconfig     7  [ + ]   pinconfig             |   |   |-- main-mdio1-pins-default
 pinconfig     8  [ + ]   pinconfig             |   |   |-- main-rgmii1-pins-default
 pinconfig     9  [ + ]   pinconfig             |   |   |-- main-rgmii2-pins-default
 pinconfig    10  [   ]   pinconfig             |   |   |-- vdd-sd-dv-pins-default
 pinconfig    11  [   ]   pinconfig             |   |   |-- extcon-usb0-gpio-id-pins-default
 pinconfig    12  [   ]   pinconfig             |   |   |-- main-usb1-pins-default
 pinconfig    13  [   ]   pinconfig             |   |   `-- ospi0-pins-default
 serial        0  [ + ]   omap_serial           |   |-- serial@2800000
 i2c           0  [   ]   i2c_omap              |   |-- i2c@20000000
 i2c           1  [   ]   i2c_omap              |   |-- i2c@20010000
 gpio          0  [   ]   pca953x               |   |   `-- gpio@22
 gpio          1  [   ]   ti_dm6441_gpio        |   |-- gpio@600000
 gpio          2  [   ]   ti_dm6441_gpio        |   |-- gpio@601000
 mmc           0  [ + ]   am654_sdhci           |   |-- mmc@fa10000
 blk           0  [ + ]   mmc_blk               |   |   `-- mmc@fa10000.blk
 mmc           1  [ + ]   am654_sdhci           |   |-- mmc@fa00000
 blk           1  [   ]   mmc_blk               |   |   `-- mmc@fa00000.blk
 mmc           2  [ + ]   am654_sdhci           |   |-- mmc@fa20000
 blk           2  [   ]   mmc_blk               |   |   `-- mmc@fa20000.blk
 nop           0  [   ]   dwc3-ti               |   |-- dwc3-usb@f900000
 usb           0  [   ]   dwc3-generic-periphe  |   |   `-- usb@31000000
 nop           1  [   ]   dwc3-ti               |   |-- dwc3-usb@f910000
 usb           0  [   ]   dwc3-generic-host     |   |   `-- usb@31100000
 simple_bus    4  [   ]   simple_bus            |   |-- bus@fc00000
 spi           0  [   ]   cadence_spi           |   |   `-- spi@fc40000
 spi_flash     0  [   ]   jedec_spi_nor         |   |       `-- flash@0
 misc          0  [ + ]   am65_cpsw_nuss        |   `-- ethernet@8000000
 eth           0  [ + ]   am65_cpsw_nuss_port   |       `-- ethernet@8000000port@1
 regulator     0  [   ]   regulator_fixed       |-- regulator-0
 regulator     1  [   ]   regulator_fixed       |-- regulator-1
 regulator     2  [   ]   regulator_fixed       |-- regulator-2
 regulator     3  [   ]   regulator_fixed       |-- fixed-regulator-sd
 regulator     4  [   ]   gpio regulator        |-- gpio-regulator-TLV71033
 firmware      1  [   ]   psci                  `-- psci
=> gpio
gpio - query and control gpio pins

Usage:
gpio <input|set|clear|toggle> <pin>
    - input/set/clear/toggle the specified pin
gpio status [-a] [<bank> | <pin>]  - show [all/claimed] GPIOs
=> gpio status -a
Bank gpio@22_:
gpio@22_0: input: 1 [ ]
gpio@22_1: input: 1 [ ]
gpio@22_2: input: 1 [ ]
gpio@22_3: output: 1 [ ]
gpio@22_4: input: 0 [ ]
gpio@22_5: input: 0 [ ]
gpio@22_6: input: 0 [ ]
gpio@22_7: input: 1 [ ]
gpio@22_8: input: 1 [ ]
gpio@22_9: input: 1 [ ]
gpio@22_10: input: 1 [ ]
gpio@22_11: input: 0 [ ]
gpio@22_12: input: 1 [ ]
gpio@22_13: input: 0 [ ]
gpio@22_14: input: 0 [ ]
gpio@22_15: input: 0 [ ]
gpio@22_16: input: 1 [ ]
gpio@22_17: input: 1 [ ]
gpio@22_18: input: 0 [ ]
gpio@22_19: input: 0 [ ]
gpio@22_20: input: 1 [ ]
gpio@22_21: input: 1 [ ]
gpio@22_22: input: 1 [ ]
gpio@22_23: input: 0 [ ]
0: input: 0 [ ]
1: input: 0 [ ]
2: input: 0 [ ]
3: input: 0 [ ]
4: input: 0 [ ]
5: input: 0 [ ]
6: input: 0 [ ]
7: input: 0 [ ]
8: input: 0 [ ]
9: input: 0 [ ]
10: input: 0 [ ]
11: input: 0 [ ]
12: input: 0 [ ]
13: input: 0 [ ]
14: input: 0 [ ]
15: input: 1 [ ]
16: input: 1 [ ]
17: input: 1 [ ]
18: input: 1 [ ]
19: input: 1 [ ]
20: input: 1 [ ]
21: input: 1 [ ]
22: input: 1 [ ]
23: input: 0 [ ]
24: input: 0 [ ]
25: input: 0 [ ]
26: input: 0 [ ]
27: input: 0 [ ]
28: input: 0 [ ]
29: input: 0 [ ]
30: input: 0 [ ]
31: output: 0 [ ]
32: input: 0 [ ]
33: input: 0 [ ]
34: input: 0 [ ]
35: input: 0 [ ]
36: input: 0 [ ]
37: input: 0 [ ]
38: input: 0 [ ]
39: input: 0 [ ]
40: input: 0 [ ]
41: input: 0 [ ]
42: input: 0 [ ]
43: input: 0 [ ]
44: input: 0 [ ]
45: input: 0 [ ]
46: input: 0 [ ]
47: input: 0 [ ]
48: input: 0 [ ]
49: input: 0 [ ]
50: input: 0 [ ]
51: input: 0 [ ]
52: input: 0 [ ]
53: input: 0 [ ]
54: input: 0 [ ]
55: input: 0 [ ]
56: input: 0 [ ]
57: input: 0 [ ]
58: input: 0 [ ]
59: input: 0 [ ]
60: input: 0 [ ]
61: input: 0 [ ]
62: input: 0 [ ]
63: input: 0 [ ]
64: input: 0 [ ]
65: input: 0 [ ]
66: input: 0 [ ]
67: input: 0 [ ]
68: input: 0 [ ]
69: input: 0 [ ]
70: input: 0 [ ]
71: input: 0 [ ]
72: input: 0 [ ]
73: input: 0 [ ]
74: input: 0 [ ]
75: input: 0 [ ]
76: input: 0 [ ]
77: input: 0 [ ]
78: input: 0 [ ]
79: input: 0 [ ]
80: input: 0 [ ]
81: input: 0 [ ]
82: input: 0 [ ]
83: input: 0 [ ]
84: input: 0 [ ]
85: input: 1 [ ]
86: input: 0 [ ]
0: input: 0 [ ]
1: input: 0 [ ]
2: input: 1 [ ]
3: input: 0 [ ]
4: input: 0 [ ]
5: input: 0 [ ]
6: input: 0 [ ]
7: input: 1 [ ]
8: input: 0 [ ]
9: input: 0 [ ]
10: input: 0 [ ]
11: input: 0 [ ]
12: input: 0 [ ]
13: input: 1 [ ]
14: input: 0 [ ]
15: input: 0 [ ]
16: input: 0 [ ]
17: input: 0 [ ]
18: input: 0 [ ]
19: input: 0 [ ]
20: input: 1 [ ]
21: input: 0 [ ]
22: input: 0 [ ]
23: input: 0 [ ]
24: input: 0 [ ]
25: input: 0 [ ]
26: input: 1 [ ]
27: input: 1 [ ]
28: input: 1 [ ]
29: input: 1 [ ]
30: input: 0 [ ]
31: input: 0 [ ]
32: input: 1 [ ]
33: input: 1 [ ]
34: input: 1 [ ]
35: input: 1 [ ]
36: input: 1 [ ]
37: input: 1 [ ]
38: input: 1 [ ]
39: input: 1 [ ]
40: input: 0 [ ]
41: input: 1 [ ]
42: input: 1 [ ]
43: input: 1 [ ]
44: input: 1 [ ]
45: input: 1 [ ]
46: input: 0 [ ]
47: input: 1 [ ]
48: input: 0 [ ]
49: input: 0 [ ]
50: input: 0 [ ]
51: input: 0 [ ]
52: input: 0 [ ]
53: input: 0 [ ]
54: input: 0 [ ]
55: input: 0 [ ]
56: input: 0 [ ]
57: input: 0 [ ]
58: input: 0 [ ]
59: input: 0 [ ]
60: input: 0 [ ]
61: input: 0 [ ]
62: input: 0 [ ]
63: input: 0 [ ]
64: input: 0 [ ]
65: input: 0 [ ]
66: input: 0 [ ]
67: input: 0 [ ]
68: input: 0 [ ]
69: input: 0 [ ]
70: input: 0 [ ]
71: input: 0 [ ]
72: input: 0 [ ]
73: input: 0 [ ]
74: input: 0 [ ]
75: input: 0 [ ]
76: input: 0 [ ]
77: input: 0 [ ]
78: input: 0 [ ]
79: input: 0 [ ]
80: input: 0 [ ]
81: input: 0 [ ]
82: input: 0 [ ]
83: input: 0 [ ]
84: input: 0 [ ]
85: input: 0 [ ]
86: input: 0 [ ]
87: input: 0 [ ]
=>