Linux/AM5728: Changing debug UART in MLO

zhengguang yang

Expert 1390 points

Part Number: AM5728

Tool/software: Linux

I want Change debug port from ttyS2 to others.For example, ttyS2 -> ttyS1

But now uboot and kernel can output messages normally. MLO can't output message.

My configuration is as follows:

device tree:

chosen {
stdout-path = &uart2;
};

pinmux:

const struct pad_conf_entry early_padconf[] = {
{UART2_RXD, (M4 | PIN_INPUT)}, /* uart2_rxd.uart2_rxd */
{UART2_TXD, (M4 | PIN_OUTPUT)}, /* uart2_txd.uart2_txd */
{I2C2_SDA, (PIN_INPUT_PULLUP | M0)}, /* I2C2_SDA */
{I2C2_SCL, (PIN_INPUT_PULLUP | M0)}, /* I2C2_SCL */
{I2C1_SDA, (PIN_INPUT_PULLUP | M0)}, /* I2C1_SDA */
{I2C1_SCL, (PIN_INPUT_PULLUP | M0)}, /* I2C1_SCL */
};

whether there is anything else need to configure?

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

The software team have been notified. They will respond here.

0 Yordan Kovachev over 8 years ago

TI__Guru**** 161600 points

Hi,

You need to change include/configs/am57xx_evm.h as well:
#define CONSOLEDEV "ttyO2"
#define CONFIG_SYS_NS16550_COM1 UART1_BASE /* Base EVM has UART0 */
#define CONFIG_SYS_NS16550_COM2 UART2_BASE /* UART2 */
#define CONFIG_SYS_NS16550_COM3 UART3_BASE /* UART3 */
#define CONFIG_BAUDRATE 115200

Best regards,
Yordan

0 zhengguang yang over 8 years ago in reply to Yordan Kovachev

Expert 1390 points

Hi Yordan:
This configure is used to specify the kernel output interface. I have already modified it.

0 Yordan Kovachev over 8 years ago in reply to zhengguang yang

TI__Guru**** 161600 points

This is the config file used to build your bootloader (u-boot). The above defines tell the bootloader & later the kernel which uart interface will be used for debug console.

But now uboot and kernel can output messages normally. MLO can't output message.

Can you share what are you seeing on your console?

Best Regards,
Yordan

0 zhengguang yang over 8 years ago in reply to Yordan Kovachev

Expert 1390 points

Fullscreen ttyS2.txt Download

U-Boot 2016.05 (Jul 27 2017 - 10:44:42 +0800)

CPU  : DRA722-GP ES1.0
Model: AM57xx EBC-GF33
Boa       Watchdog enabled
I2C:   ready
DRAM:  2 GiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
SF: Detected W25Q32DW with page size 256 Bytes, erase size 4 KiB, total 4 MiB, mapped at 5c000000
*** Warning - bad CRC, using default environment

SF: Detected W25Q32DW with page size 256 Bytes, erase size 4 KiB, total 4 MiB, mapped at 5c000000
Read MAC from qspi.
Skipped ethaddr assignment due to invalid,using default!
booting from SD
SCSI:  SATA link 0 timeout.
AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: 64bit ncq stag pm led clo only pmp pio slum part ccc apst
scanning bus for devices...
Found 0 device(s).
Net:   eth0: ethernet@48484000
Hit any key to stop autoboot:  0
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device 0
3444784 bytes read in 165 ms (19.9 MiB/s)
93360 bytes read in 18 ms (4.9 MiB/s)
Booting from mmc0 ...
Kernel image @ 0x82000000 [ 0x000000 - 0x349030 ]
## Flattened Device Tree blob at 88000000
   Booting using the fdt blob at 0x88000000
   Loading Device Tree to 8ffe6000, end 8ffffcaf ... OK

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 4.4.19-gdb0b54cdad (root@qing) (gcc version 5.3.1 20160113 (Linaro GCC 5.3-2016.02) ) #2 SMP PREEMPT Mon Jul 24 16:39:50 CST 2017

Fullscreen ttyS1.txt Download

U-Boot SPL 2016.05-svn1715 (Jul 27 2017 - 14:46:34)
DRA752-GP ES2.0
Trying to boot from MMC1
reading u-boot.img
reading u-boot.img
reading u-boot.img
reading u-boot.img


U-Boot 2016.05-svn1715 (Jul 27 2017 - 14:46:34 +0800)

CPU  : DRA752-GP ES2.0
Model: AM57xx ROM7510
BoaI2C:   ready
DRAM:  2 GiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
SF: Detected W25Q32BV with page size 256 Bytes, erase size 4 KiB, total 4 MiB, mapped at 5c000000
*** Warning - bad CRC, using default environment

SF: Detected W25Q32BV with page size 256 Bytes, erase size 4 KiB, total 4 MiB, mapped at 5c000000
Read MAC from qspi.
Skipped ethaddr assignment due to invalid,using default!
booting from SD
SCSI:  SATA link 0 timeout.
AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: 64bit ncq stag pm led clo only pmp pio slum part ccc apst
scanning bus for devices...
Found 0 device(s).
Net:   eth0: ethernet@48484000
Hit any key to stop autoboot:  0
omap_hsmmc_send_cmd : timeout: No status update
SD/MMC found on device 0
3594112 bytes read in 179 ms (19.1 MiB/s)
100532 bytes read in 23 ms (4.2 MiB/s)
Booting from mmc0 ...
Kernel image @ 0x82000000 [ 0x000000 - 0x36d780 ]
## Flattened Device Tree blob at 88000000
   Booting using the fdt blob at 0x88000000
   Loading Device Tree to 8ffe4000, end 8ffff8b3 ... OK

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 4.4.19-gdb0b54cdad (root@AplusTC_ECG) (gcc version 5.3.1 20160113 (Linaro GCC 5.3-2016.02) ) #209 SMP PREEMPT Thu Jul 27 14:49:57 CST 2017

The above is the log information of ttyS2/ttyS1

ttyS1 lacks the following information which was printed by MLO:

U-Boot SPL 2016.05-svn1715 (Jul 27 2017 - 14:46:34)
DRA752-GP ES2.0
Trying to boot from MMC1
reading u-boot.img
reading u-boot.img
reading u-boot.img
reading u-boot.img

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Linux/AM5728: Changing debug UART in MLO