Hello all,
I have the following system:
Colibri IMX6ULL 512MB
Operating system: The Ångström distribution v2017.12
Kernel: Linux 4.9.220-2.8.7+g57229263ff65
I want to use the following pins as GPIOs.
SW_MUX_CTL_PAD_UART4_RX_DATA
SW_MUX_CTL_PAD_UART4_TX_DATA
SW_MUX_CTL_PAD_GPIO1_IO04
SW_MUX_CTL_PAD_GPIO1_IO05
For this I have set the MUX_MODE to 0101. After a certain time the MUX_MODE is reset by the system. Can someone tell me how to turn off this behavior?
Hi @Wilhelm !
I don’t know how this can happen… Could you please share how you changed the MUX_MODE in first place?
You should do it on the device tree and this will not be changed on the running system.
Best regards,
Hi @henrique.tx ,
i mapped the IOMUXC register via mmap and wrote the 0101 for ALT5 (GPIO-Mode) direct to the register.
Best regards,
Wilhelm
Hi @Wilhelm !
You should perform MUX changes on the device tree.
Please refer to the Device Tree Customization Examples | Toradex Developer Center article for some examples.
Best regards,
