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usart6 serial error setting baudrate
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2025-11-10 8:12 PM - edited 2025-11-10 8:13 PM
hi team,
I'm facing issue in enabling usart6 of the expansion connector of stm32mp257f-ev1,
All i did was to enable the &usart6 via DT overlay, even tried disabling dmas, but no luck.
I have attached the kernel log and also attached the RIFSC debug log FYR
Hoping for a quick reply, thanks in advance.
/dts-v1/;
/plugin/;
/ {
compatible = "st,stm32mp257f-ev1";
fragment@0 {
target = <&usart6>;
__overlay__ {
status = "okay";
};
};
};$ stty -F /dev/ttySTM1 115200
E/TC:0 stm32_serc_handle_ilac:133 SERC exceptions [63:32]: 0x10
E/TC:0 stm32_serc_handle_ilac:139 SERC exception ID: 36
[ 39.106314] SError Interrupt on CPU0, code 0x00000000bf000002 -- SError
[ 39.106336] CPU: 0 PID: 1618 Comm: stty Tainted: G O 6.6.78 #1
[ 39.106344] Hardware name: STMicroelectronics STM32MP257F-EV1 Evaluation Board (DT)
[ 39.106348] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 39.106357] pc : stm32_usart_rx_dma_start_or_resume+0x80/0x234
[ 39.106375] lr : stm32_usart_startup+0x8c/0x130
[ 39.106383] sp : ffff80008352b950
[ 39.106385] x29: ffff80008352b950 x28: ffff000093789080 x27: 0000000000020800
[ 39.106399] x26: ffff800081037828 x25: ffff800081037468 x24: 0000000000000000
[ 39.106409] x23: 0000000000000000 x22: ffff00008c5b5c00 x21: ffff8000819fd088
[ 39.106419] x20: 0000000000000000 x19: ffff800081b19210 x18: 0000000000000001
[ 39.106428] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
[ 39.106437] x14: 0000000000000000 x13: 006c61697265732e x12: 3030303032323034
[ 39.106447] x11: 0000000000000037 x10: ffff80008112e9b8 x9 : 0000000000000000
[ 39.106457] x8 : ffff00008c52d0c0 x7 : 0000000000000000 x6 : ffff8000819a3ce8
[ 39.106466] x5 : ffff00008246ce08 x4 : ffff00008246cec8 x3 : 0000000000000000
[ 39.106476] x2 : ffff800081e05000 x1 : 0000000000000000 x0 : ffff0000818b2080
[ 39.106488] Kernel panic - not syncing: Asynchronous SError Interrupt
[ 39.106491] CPU: 0 PID: 1618 Comm: stty Tainted: G O 6.6.78 #1
[ 39.106497] Hardware name: STMicroelectronics STM32MP257F-EV1 Evaluation Board (DT)
[ 39.106501] Call trace:
[ 39.106505] dump_backtrace+0x94/0x114
[ 39.106517] show_stack+0x18/0x24
[ 39.106526] dump_stack_lvl+0x48/0x60
[ 39.106535] dump_stack+0x18/0x24
[ 39.106542] panic+0x324/0x380
[ 39.106550] nmi_panic+0x8c/0x90
[ 39.106557] arm64_serror_panic+0x6c/0x78
[ 39.106563] do_serror+0x3c/0x70
[ 39.106569] el1h_64_error_handler+0x30/0x48
[ 39.106578] el1h_64_error+0x64/0x68
[ 39.106584] stm32_usart_rx_dma_start_or_resume+0x80/0x234
[ 39.106592] stm32_usart_startup+0x8c/0x130
[ 39.106600] uart_startup+0x13c/0x2fc
[ 39.106609] uart_port_activate+0x34/0x9c
[ 39.106616] tty_port_open+0x8c/0x13c
[ 39.106625] uart_open+0x1c/0x30
[ 39.106632] tty_open+0x138/0x6dc
[ 39.106639] chrdev_open+0xbc/0x208
[ 39.106649] do_dentry_open+0x1b0/0x524
[ 39.106660] vfs_open+0x2c/0x38
[ 39.106666] path_openat+0xb14/0xdf0
[ 39.106676] do_filp_open+0x9c/0x14c
[ 39.106684] do_sys_openat2+0xc4/0x104
[ 39.106691] __arm64_sys_openat+0x64/0xac
[ 39.106697] invoke_syscall+0x48/0x114
[ 39.106706] el0_svc_common.constprop.0+0x40/0xe0
[ 39.106715] do_el0_svc+0x1c/0x28
[ 39.106723] el0_svc+0x38/0xc8
[ 39.106731] el0t_64_sync_handler+0x120/0x12c
[ 39.106738] el0t_64_sync+0x190/0x194
[ 39.106746] SMP: stopping secondary CPUs
[ 39.106761] Kernel Offset: disabled
[ 39.106763] CPU features: 0x0,00000000,00020000,0000421b
[ 39.106769] Memory Limit: none
[ 39.367284] ---[ end Kernel panic - not syncing: Asynchronous SError Interrupt ]---
CTRL-A Z for help | 115200 8N1 | NOR | Minicom 2.9 | VT102 | Offline | ttyACM0 root@stm32mp25-eval-e3-e4-6a:~# cat /sys/kernel/debug/stm32_firewall/rifsc
=============================================
RIFSC dump
=============================================
=============================================
RISUP dump
=============================================
| Peripheral name || Firewall ID || N/SECURE || N/PRIVILEGED || CID filtering || Semaphore mode || SCID || SEMWL |
| TIM1 || 0 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM2 || 1 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM3 || 2 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM4 || 3 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM5 || 4 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM6 || 5 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM7 || 6 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM8 || 7 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM10 || 8 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM11 || 9 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM12 || 10 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM13 || 11 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM14 || 12 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM15 || 13 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM16 || 14 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM17 || 15 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| TIM20 || 16 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| LPTIM1 || 17 || SEC || PRIV || enabled || disabled || 1 || 0x0 |
| LPTIM2 || 18 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| LPTIM3 || 19 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| LPTIM4 || 20 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| LPTIM5 || 21 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SPI1 || 22 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SPI2 || 23 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SPI3 || 24 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SPI4 || 25 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SPI5 || 26 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SPI6 || 27 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SPI7 || 28 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SPI8 || 29 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SPDIFRX || 30 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| USART1 || 31 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| USART2 || 32 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| USART3 || 33 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| UART4 || 34 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| UART5 || 35 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| USART6 || 36 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| UART7 || 37 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| UART8 || 38 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| UART9 || 39 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| LPUART1 || 40 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I2C1 || 41 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I2C2 || 42 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I2C3 || 43 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I2C4 || 44 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I2C5 || 45 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I2C6 || 46 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I2C7 || 47 || SEC || PRIV || enabled || disabled || 1 || 0x0 |
| I2C8 || 48 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SAI1 || 49 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SAI2 || 50 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SAI3 || 51 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SAI4 || 52 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 53 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| MDF1 || 54 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| ADF1 || 55 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| FDCAN || 56 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| HDP || 57 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| ADC12 || 58 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| ADC3 || 59 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| ETH1 || 60 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| ETH2 || 61 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 62 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| USBH || 63 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 64 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 65 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| USB3DR || 66 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| COMBOPHY || 67 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| PCIE || 68 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| UCPD1 || 69 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| ETHSW_DEIP || 70 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| ETHSW_ACM_CF || 71 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| ETHSW_ACM_MSGB || 72 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| STGEN || 73 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| OCTOSPI1 || 74 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| OCTOSPI2 || 75 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SDMMC1 || 76 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SDMMC2 || 77 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SDMMC3 || 78 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| GPU || 79 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| LTDC_CMN || 80 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| DSI_CMN || 81 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 82 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 83 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| LVDS || 84 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 85 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| CSI || 86 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| DCMIPP || 87 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| DCMI_PSSI || 88 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| VDEC || 89 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| VENC || 90 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 91 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RNG || 92 || SEC || PRIV || enabled || disabled || 1 || 0x0 |
| PKA || 93 || SEC || PRIV || enabled || disabled || 1 || 0x0 |
| SAES || 94 || SEC || PRIV || enabled || disabled || 1 || 0x0 |
| HASH || 95 || SEC || PRIV || enabled || disabled || 1 || 0x0 |
| CRYP1 || 96 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| CRYP2 || 97 || SEC || PRIV || enabled || disabled || 2 || 0x0 |
| IWDG1 || 98 || SEC || PRIV || enabled || disabled || 1 || 0x0 |
| IWDG2 || 99 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| IWDG3 || 100 || SEC || PRIV || enabled || disabled || 2 || 0x0 |
| IWDG4 || 101 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| IWDG5 || 102 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| WWDG1 || 103 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| WWDG2 || 104 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 105 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| VREFBUF || 106 || SEC || PRIV || enabled || disabled || 1 || 0x0 |
| DTS || 107 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RAMCFG || 108 || SEC || PRIV || enabled || disabled || 1 || 0x0 |
| CRC || 109 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| SERC || 110 || SEC || PRIV || enabled || disabled || 1 || 0x0 |
| OCTOSPIM || 111 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| GICV2M || 112 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 113 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I3C1 || 114 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I3C2 || 115 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I3C3 || 116 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| I3C4 || 117 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| ICACHE_DCACHE || 118 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| LTDC_L1L2 || 119 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| LTDC_L3 || 120 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| LTDC_ROT || 121 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| DSI_TRIG || 122 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| DSI_RDFIFO || 123 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| RESERVED || 124 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| OTFDEC1 || 125 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| OTFDEC2 || 126 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
| IAC || 127 || NSEC || NPRIV || disabled || disabled || 0 || 0x0 |
=============================================
RIMU dump
=============================================
| Initiator name || CIDSEL || MCID || N/SECURE || N/PRIVILEGED |
| ETR || CIDSEL || 1 || NSEC || PRIV |
| SDMMC1 || || 0 || NSEC || PRIV |
| SDMMC2 || || 0 || NSEC || PRIV |
| SDMMC3 || || 0 || NSEC || PRIV |
| USB3DR || || 0 || NSEC || PRIV |
| USBH || || 0 || NSEC || PRIV |
| ETH1 || || 0 || NSEC || PRIV |
| ETH2 || || 0 || NSEC || PRIV |
| PCIE || || 0 || NSEC || PRIV |
| GPU || || 0 || NSEC || PRIV |
| DMCIPP || || 0 || NSEC || PRIV |
| LTDC_L1/L2 || CIDSEL || 0 || NSEC || PRIV |
| LTDC_L3 || CIDSEL || 0 || NSEC || PRIV |
| LTDC_ROT || CIDSEL || 0 || NSEC || PRIV |
| VDEC || || 0 || NSEC || PRIV |
| VENC || || 0 || NSEC || PRIV |
=============================================
RISAL dump
=============================================
| Memory || Subreg. || N/SECURE || N/PRIVILEGED || Subreg. CID || Resource lock || Subreg. enable || Subreg. start || Subreg. end |
| LPSRAM1 || A || NSEC || NPRIV || 0x1 || unlocked (0) || enabled || 0x200c0000 || 0x200c1fff |
| LPSRAM1 || B || NSEC || NPRIV || 0x3 || unlocked (0) || enabled || 0x200c0000 || 0x200c1fff |
| LPSRAM2 || A || NSEC || NPRIV || 0x1 || unlocked (0) || enabled || 0x200c2000 || 0x200c3fff |
| LPSRAM2 || B || NSEC || NPRIV || 0x3 || unlocked (0) || enabled || 0x200c2000 || 0x200c3fff |
| LPSRAM3 || A || NSEC || NPRIV || 0x1 || unlocked (0) || enabled || 0x200c4000 || 0x200c7fff |
| LPSRAM3 || B || NSEC || NPRIV || 0x3 || unlocked (0) || enabled || 0x200c4000 || 0x200c7fff |
root@stm32mp25-eval-e3-e4-6a:~#
Labels:
- Labels:
-
DMA
-
OpenSTLinux
-
STM32MP25 Lines
-
UART-USART
0 REPLIES 0
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