OCTVO-3P-OSD62X: SD card boot support for OSD62x

Hello,

Please see the following thread:

e2e.ti.com/.../sk-am62p-lp-how-to-set-sd-card-to-3-3v-only-low-speed

Hello Prashant,

I cannot find these lines in my dts file 

- ti,otap-del-sel-sdr12 = <0xf>;
- ti,otap-del-sel-sdr25 = <0xf>;
- ti,otap-del-sel-sdr50 = <0xc>;
- ti,otap-del-sel-ddr50 = <0x9>;
- ti,otap-del-sel-sdr104 = <0x6>;

I am using k3-am625-osd625-brk.dts file made image using this reference https://github.com/octavosystems/osd62-pm-brk-tisdk/wiki/Modifying-a-Beagleboard.org%C2%AE-image-for-OSD62%E2%80%90PM%E2%80%90BRK


Regards
Mohit

Hello Prashant,

I have made the changes in k3-am625-osod625-brk.dts But got the same error while booting via SD card

U-Boot SPL 2024.04-dirty (Sep 01 2025 - 11:47:03 +0530)
SYSFW ABI: 4.0 (firmware rev 0x000a '10.1.8--v10.01.08 (Fiery Fox)')
SPL initial stack usage: 13392 bytes
Trying to boot from MMC2
Authentication passed
Authentication passed
Authentication passed
Authentication passed
Authentication passed
Starting ATF on ARM64 core...

NOTICE:  BL31: v2.11.0(release):v2.11.0-906-g58b25570c9-dirty
NOTICE:  BL31: Built : 04:20:32, Nov  1 2024

U-Boot SPL 2024.04-dirty (Sep 01 2025 - 11:47:23 +0530)
SYSFW ABI: 4.0 (firmware rev 0x000a '10.1.8--v10.01.08 (Fiery Fox)')
SPL initial stack usage: 1888 bytes
Card did not respond to voltage select! : -110
** Bad device specification mmc 1 **
Couldn't find partition mmc 1:1
Error: could not access storage.
Trying to boot from MMC2
Card did not respond to voltage select! : -110
spl: mmc init failed with error: -95
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###



Below I am attaching the changes I had made in the file /home/<user_name>/ti-processor-sdk-linux-am62xx-evm-10.01.10.04/board-support/ti-linux-kernel-6.6.58+git-ti/arch/arm64/boot/dts/ti/k3-am625-osd625-brk.dts

&sdhci1 {
             /* SD/MMC */
             vmmc-supply = <&vdd_mmc1>;
             vqmmc-supply = <&vdd_sd_dv>;
             bootph-all;
             status = "okay";
             sdhci-caps-mask = <0x00000007 0x00000000>;
             pinctrl-names = "default";
             pinctrl-0 = <&main_mmc1_pins_default>;
             disable-wp;
};

After this I have followed 2 instructions
1. make linux-dtbs

2. sudo cp board-support/ti-linux-kernel-6.6.58+git-ti/arch/arm64/boot/dts/ti/k3-am625-osd625-brk.dtb /media/<user_name>/BOOT/ti/

Regards
Mohit

Hello Prashant,

I had made changes in kernel and uboot, now the board boots, but when selecting the CHOICE:4(SD card default), It gives me the below error repeatedly.

Starting kernel ...

[    1.244818] omap8250 2820000.serial: failed to get alias
[    1.251141] omap8250 2850000.serial: failed to get alias
[    1.260261] am65-cpsw-nuss 8000000.ethernet: /bus@f0000/ethernet@8000000/ethernet-ports/port@1 read phy-mode err -22
[   14.303501] mmc1: Timeout waiting for hardware interrupt.
[   14.308922] mmc1: sdhci: ============ SDHCI REGISTER DUMP ===========
[   14.315356] mmc1: sdhci: Sys addr:  0x00000058 | Version:  0x00001004
[   14.321789] mmc1: sdhci: Blk size:  0x00007200 | Blk cnt:  0x00000002
[   14.328222] mmc1: sdhci: Argument:  0x00000000 | Trn mode: 0x00000023
[   14.334654] mmc1: sdhci: Present:   0x01f70001 | Host ctl: 0x0000001b
[   14.341087] mmc1: sdhci: Power:     0x0000000f | Blk gap:  0x00000080
[   14.347520] mmc1: sdhci: Wake-up:   0x00000000 | Clock:    0x00000203
[   14.353953] mmc1: sdhci: Timeout:   0x0000000e | Int stat: 0x00000000
[   14.360385] mmc1: sdhci: Int enab:  0x03ff008b | Sig enab: 0x03ff008b
[   14.366817] mmc1: sdhci: ACmd stat: 0x00000000 | Slot int: 0x00000000
[   14.373249] mmc1: sdhci: Caps:      0x3de8c801 | Caps_1:   0x18002407
[   14.379682] mmc1: sdhci: Cmd:       0x00000c1b | Max curr: 0x00000000
[   14.386113] mmc1: sdhci: Resp[0]:   0x00000900 | Resp[1]:  0x0076b27f
[   14.392546] mmc1: sdhci: Resp[2]:   0x325b5900 | Resp[3]:  0x00000900
[   14.398978] mmc1: sdhci: Host ctl2: 0x00000000
[   14.403416] mmc1: sdhci: ADMA Err:  0x00000000 | ADMA Ptr: 0x0000000084468284

Regards
Mohit

Hello,

Could you please share the full Kernel logs?

Please use the "Insert -> Code" options to attach any logs for better readability.

Thanks!

Hello Prashant,

The board is booted, there are some connectivity issues after changing the legacy speed to 3.3V. Thanks for your help.

Regards
Mohit