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i.MX6UL - I2C1 and UART4 pin conflict?

Question asked by J S on Mar 14, 2016
Latest reply on Mar 14, 2016 by igorpadykov

Using kernel 4.4, I cannot get I2C1 and UART4 working together on i.MX6UL EVK. As soon as UART4 is enabled in device tree, I2C1 stops working. I2C1 is working correctly both in kernel with UART4 disabled and in u-boot.

 

Device tree config:

 

MX6UL_PAD_CSI_MCLK__I2C1_SDA 0x4001b8b1

MX6UL_PAD_CSI_PIXCLK__I2C1_SCL 0x4001b8b1

 

MX6UL_PAD_UART4_TX_DATA__UART4_DCE_TX 0x1f0b1

MX6UL_PAD_UART4_RX_DATA__UART4_DCE_RX 0x1f0b1

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