We are developing produce based on i.MX6UL. We are facing an issue while booting the board from uSDHC2 port. We are using below mention pinmux for uSCHD2. We have set the boot config register to boot device from uSDHC2 port along with boot mode setting to internal boot. When we power up the device, The i.MX6UL Boot ROM is not generate any clock on usdhc2.CLK (LCD_DATA19) pin to boot from uSDHC2
During debugging, we found,The i.MX6UL boot ROM generates clock on "NAND_RE_B" pin.
Is there any way available to set Boot ROM to generate CLK on "usdhc2.CLK (LCD_DATA19)" and boot from uSDHC2 port with above mentioned pin settings?
From reference manual section 18.104.22.168 IOMUX Configuration for SD/MMC;
It seems that for USDHC boot you can only use specific pads and not other alternatives.
For your case, booting from USDHC2 seems to be only supported through NAND_... pads.