Tool/software:
Hello
We are trying to read the I2c Configuration register(Listed Below) using devmem2
|
Bus |
I2C_PSC |
I2C_SCLL |
I2C_SCLH |
|
WKUP_I2C0 |
0x421200B0 |
0x421200B4 |
0x421200B8 |
|
I2C0 |
0x020000B0 |
0x020000B4 |
0x020000B8 |
|
I2C1 |
0x020100B0 |
0x020100B4 |
0x020100B8 |
|
I2C3 |
0x0203 00B0 |
0x020300B4 |
0x020300B8 |
|
MCU_I2C0 |
0x40B0 00B0 |
0x40B000B4 |
0x40B000B8 |
|
MCU_I2C1 |
0x40B1 00B0 |
0x40B100B4 |
0x40B100B8 |
We cannot able to read the register high lighted in Red. added the Error log during the read operation.
root@j784s4-evm:~# devmem2 0x020300B0 /dev/mem opened. [ 262.587319] SError Interrupt on CPU7, code 0x00000000bf000000 -- SError [ 262.587330] CPU: 7 PID: 1009 Comm: devmem2 Not tainted 6.1.80-00004-g1800603e29ef-dirty #18 [ 262.587334] Hardware name: **************** [ 262.587336] pstate: 40000000 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 262.587340] pc : 0000ffff9db89c68 [ 262.587342] lr : 0000ffff9db8bed0 [ 262.587343] sp : 0000ffffd4b879b0 [ 262.587344] x29: 0000ffffd4b879b0 x28: 0000000000000000 x27: 0000000000412000 [ 262.587350] x26: 0000ffff9dbad0b0 x25: 0000ffffd4b87d78 x24: 0000ffffd4b87b80 [ 262.587355] x23: 0000000000000003 x22: 0000000000000002 x21: 0000000000000048 [ 262.587359] x20: 0000ffff9dbb6360 x19: 0000000000412018 x18: 0000000000000000 [ 262.587364] x17: 0000ffff9db8be88 x16: 0000000000411ff8 x15: 0000000000000001 [ 262.587368] x14: 0000000000000001 x13: 2073736572646461 x12: 0000ffff9dbad000 [ 262.587372] x11: 000000000000000e x10: 000000000000000a x9 : 0000ffffd4b879f4 [ 262.587376] x8 : 0000000000000040 x7 : 3030306461626439 x6 : 0000000000400358 [ 262.587380] x5 : 0000000000000000 x4 : 0000000000411f68 x3 : 0000000000000000 [ 262.587384] x2 : 00000000004003b8 x1 : 0000000000000008 x0 : 0000000000400550 [ 262.587390] Kernel panic - not syncing: Asynchronous SError Interrupt [ 262.587392] CPU: 7 PID: 1009 Comm: devmem2 Not tainted 6.1.80-00004-g1800603e29ef-dirty #18 [ 262.587395] Hardware name: *************** [ 262.587397] Call trace: [ 262.587399] dump_backtrace.part.0+0xdc/0xf0 [ 262.587415] show_stack+0x18/0x30 [ 262.587419] dump_stack_lvl+0x68/0x84 [ 262.587424] dump_stack+0x18/0x34 [ 262.587427] panic+0x188/0x348 [ 262.587433] nmi_panic+0xac/0xb0 [ 262.587438] arm64_serror_panic+0x6c/0x7c [ 262.587443] do_serror+0x58/0x5c [ 262.587447] __el0_error_handler_common+0x40/0xa4 [ 262.587451] el0t_64_error_handler+0x10/0x20 [ 262.587455] el0t_64_error+0x18c/0x190 [ 262.587458] SMP: stopping secondary CPUs [ 262.587464] Kernel Offset: disabled [ 262.587465] CPU features: 0x40000,20028084,0000420b [ 262.587468] Memory Limit: none [ 262.773881] ---[ end Kernel panic - not syncing: Asynchronous SError Interrupt ]---
