HI,everyone. I want to add ch934.c to source code /driver/tty/serial,and I add the followed txt into the kernel file:$kernel_src\drivers\tty\serial\Konfig config SERIAL_CH9434 tristate “SERIAL_CH9434 serial support” depends on SPI select SERIAL_CORE help This selects support for ch9434 serial…

[image] sjz_SH: SPI0.0 is not found under /de It is expected since you use ch943x_spi driver instead. It seems you could probe the ch9434 driver successfully since you get the new /dev/ttyWCH* node. Sorry that I’m not familiar with how this driver works. I would suggest you asking the help…

Hi sjz_shaohua, [image] sjz_SH: I want to add ch934.c to source code /driver/tty/serial, It seems a custom driver, do you get the porting guide from your vendor? [image] sjz_SH: But when I make -j5 Image and make -j5 modules,I don’t get ch9434.ko Is CONFIG_SERIAL_CH943X included in .…

Hi,Kevin I modified it according to the supplier’s guidance. And,I also added CONFIG_SERIAL_CH943X=y in kernel_src/kernel/kernel-5.10/arch/arm64/configs/tegra_defconfig. Also, sudo make tegra_defconfig in kernel_src/kernel/kernel-5.10 [pic]

Is it included in .config? Or you could just define as the following: obj-y+= ch9434.o Please check if there’s any object built for ch9434 after your run make command

Hi,Kevin Now CH934.ko is loaded to the system, but when I restart the device after updating the Image, the system fails to boot and this error message appears in the log message. [1706152559432] And,What is the reason for this? Thanks!

Please share the log file instead of screenshot for us to check. It seems your ch943x probe failed during boot up. You have to add debug message in your driver to check how error -22 comes from. I would suggest you could build the driver as kernel module with the following definition. obj-m+= ch…

I’m clear about what you added in ch934 driver to debug It seems the probe failed. Are you using PCC.03 for ch934? It seems this pin is used for CAM_I2C_MUX by default and pulled low in the following line. gpio@c2f0000 { gpio-init-names = "default"; gpio-init-0 = <&gpio_aon_default>; gpio_ao…

Hi,KevinFFF I have modified the GPIO interrupt and can also use it. Now I have encountered a new problem, and there is an error in the process of data transmission from spi to CH9434. I want to know if /drivers/spi/ spi-tegra114. c needs to be modified, and how should it be modified? And, SPI0.0 is…

Hi,Kevin By adding print information to source/drivers/spi/spi.c, it is found that __spi_validate_bits_per_word() appears on line 3593 in function __spi_validate(). -EINVAL(-22), bits_per_word(239) > 32. This error occurs when I execute echo “123” > ttyWCH0. [pic3] [pic4]

How to add new ch9434.c(SPI to UART) on Orin nx

Robotics & Edge Computing Jetson Systems Jetson Orin NX

sjz_SH February 1, 2024, 2:22am 8

Hi,Kevin
When I loaded CH934.KO, the error message in the figure appeared through dmesg, I used GPIO06(PCC.03) as the interrupt, is the error message because of GPIO06(PCC.03)? Thank you

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How to add new ch9434.c(SPI to UART) on Orin nx

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