Question
spi3 can't be used in stm32mp257f-ev1
I flash the image from FlashLayout_sdcard_stm32mp257f-ev1-ca35tdcid-ostl-m33-examples-optee.tsv
pi@inspiron:~/yocto/build-openstlinuxweston-stm32mp2/tmp-glibc/deploy/images/stm32mp2$ STM32_Programmer_CLI -c port=usb1 -w flashlayout_st-image-weston/optee/FlashLayout_sdcard_stm32mp257f-ev1-ca35tdcid-ostl-m33-examples-optee.tsv
I copy stm32mp257f-ev1-ca35tdcid-ostl-m33-examples.dts from the following directory.
pi@inspiron:~/yocto/build-openstlinuxweston-stm32mp2/tmp-glibc/work-shared/stm32mp2/external-dt/linux$ ls
Makefile stm32mp257f-dk-ca35tdcid-ostl-resmem.dtsi
stm32mp135f-dk-rt.dts stm32mp257f-ev1-ca35tdcid-ostl.dts
stm32mp157f-dk2-rt.dts stm32mp257f-ev1-ca35tdcid-ostl-m33-examples.dts
stm32mp157f-ev1-rt.dts stm32mp257f-ev1-ca35tdcid-ostl-m33-examples-resmem.dtsi
stm32mp257f-dk-ca35tdcid-ostl.dts stm32mp257f-ev1-ca35tdcid-ostl-resmem.dtsi
stm32mp257f-dk-ca35tdcid-ostl-m33-examples.dts stm32mp257f-ev1-rt.dts
stm32mp257f-dk-ca35tdcid-ostl-m33-examples-resmem.dtsi
I carefully checked the dts and found the spi3 was not enabled.
But after I enabled the spi3(line 754), the spi bus can't be probed.
root@stm32mp2:~# dmesg | grep spi
[ 0.274005] stm32-sys-bus 42080000.rifsc: spi@400c0000: Peripheral will not be probed
So how to enable spi3 in stm32mp257f-ev1?
even I didn't enable the spi3, the SPI3_SCLK(PB7)/SPI3_MOSI(PB8)/SPI3_MISO(PB10) has been already occupied.
but I in deed can't found which one has used the pins.
root@stm32mp2:~# gpioinfo -c 1
gpiochip1 - 16 lines:
line 0: "PB0" input
line 1: "PB1" input consumer="kernel"
line 2: "PB2" input consumer="kernel"
line 3: "PB3" input
line 4: "PB4" input consumer="kernel"
line 5: "PB5" input consumer="kernel"
line 6: "PB6" input consumer="kernel"
line 7: "PB7" input consumer="kernel"
line 8: "PB8" input consumer="kernel"
line 9: "PB9" input
line 10: "PB10" input consumer="kernel"
line 11: "PB11" input consumer="kernel"
line 12: "PB12" input
line 13: "PB13" input
line 14: "PB14" input
line 15: "PB15" input