How to configuration for STM32MP151

[bkwak]

I want to change the environment with STM32MP151.

but I can't find about this information ,

question

1) How to configure STM32MP151 for uboot ?

how to change to single core from dual core ?

2) How to configure STM32MP151 for linux kernel?

3) Is it possible to test the operation by setting the dual core of the STM32MP157C-DK2 to single core?

[Christophe Guibout]

Hi @bkwak​ ,

1) default config is generic for all STM32MP15x

2) Not sure to catch the question, but if your board contains a STM32MP151, its kernel device tree needs to inherit from stm32mp151.dtsi.

3 Yes, second CPU of the STM32MP157C-DK2 can easily be "unplugged" by executing the following command in the kernel console :

echo 0 > /sys/devices/system/cpu/cpu1/online

BR,

Christophe

[Olivier GALLIEN]

Hi @bkwak​ 

@Christophe Guibout​ antipate a bit what we target to deliver mid-july in coming V2.0 release and which simplify adaptation to mp151.

In the meantime using V1.2 you can refer to this article :

https://community.st.com/s/article/FAQ-STM32MP1-how-to-adapt-DT-to-MP151-and-MP153

Olivier

[UWeis.1 · Accepted solution]

​Hello,

i need to change the chip and the package:

MP157 -> MP151 and STM32MP15xxAA: TFBGA448 18x18 -> STM32MP15xxAB: LFBGA354 16x16

I followed this recommendation https://community.st.com/s/article/FAQ-STM32MP1-how-to-adapt-DT-to-MP151-and-MP153

It was also nessesary to blacklist the device_id in drivers/cpufreq/cpufreq-dt-platdev.c

static const struct of_device_id blacklist[] __initconst = {

...

{ .compatible = "st,stm32mp157", },

+++ { .compatible = "st,stm32mp151", },

…

Are there some other actions necessary?

The driver tries to load the pinctrl-z, which is not avalaible in this package?

Hopefully that's not the cause of other problems.

stm32mp157-pinctrl soc:pin-controller-z@54004000: No package detected, use default one

stm32mp157-pinctrl soc:pin-controller-z@54004000: at least one GPIO bank is required

stm32mp157-pinctrl: probe of soc:pin-controller-z@54004000 failed with error -22

Next is a problem with the Interrupt?:

[   1.508663] stpmic1 1-0033: PMIC Chip Version: 0x21

[   1.514297] BUCK1: supplied by regulator-dummy

[   1.520372] BUCK2: supplied by regulator-dummy

[   1.526303] BUCK3: supplied by regulator-dummy

[   1.532204] BUCK4: supplied by regulator-dummy

[   1.542394] ------------[ cut here ]------------

[   1.545556] WARNING: CPU: 0 PID: 0 at kernel/sched/core.c:3260 of_find_node_by_phandle+0xc4/0x13c

[   1.554408] Unable to handle kernel NULL pointer dereference at virtual address 000000c8

[   1.554418] pgd = 704b3cd0

[   1.554423] [000000c8] *pgd=00000000

[   1.554436] Internal error: Oops: 5 [#1] PREEMPT ARM

[   1.554443] Modules linked in:

[   1.554456] CPU: 0 PID: 0 Comm: Not tainted 4.19.94 #19

[   1.554460] Hardware name: Generic DT based system

[   1.554472] PC is at account_system_index_time+0x30/0xf4

[   1.554480] LR is at account_system_time+0x7c/0x90

[   1.554486] pc : [<c014ec18>]   lr : [<c014ed58>]   psr: 00000193

[   1.554491] sp : d309fd58 ip : d309e090 fp : c018fe64

[   1.554496] r10: ffffe000 r9 : ffffe000 r8 : c0ea3d94

[   1.554501] r7 : 00000002 r6 : d309e090 r5 : 00000000 r4 : 00989680

[   1.554507] r3 : 00000000 r2 : 00000000 r1 : 00000002 r0 : d309e090

[   1.554515] Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none

[   1.554521] Control: 10c53c7d Table: c0004059 DAC: 00000051

[   1.554527] Process (pid: 0, stack limit = 0x05296946)

[   1.554534] Stack: (0xd309fd58 to 0x613d6e4f)

Any recommendations?

Are the new dts files already available for test?

best regards

Ulrich