This enables support for systems based on the Freescale i.MX1 family

This enables support for systems based on the Freescale i.MX2 family

This enables support for systems based on the Freescale i.MX25 family

This enables support for systems based on the Freescale i.MX3 family

This enables support for machines using Freescale's i.MX50 and i.MX51
processors.

This enables support for systems based on the Freescale i.MX51 family

Select this if you want to use prioritized IRQ handling.
This feature prevents higher priority ISR to be interrupted
by lower priority IRQ even IRQF_DISABLED flag is not set.
This may be useful in embedded applications, where are strong
requirements for timing.
Say N here, unless you have a specialized requirement.

Enable support for the i.MX PWM controller(s).

The debug board is an integral part of the MXC 3-stack(PDK)
platforms, it can be attached or removed from the peripheral
board. On debug board, several debug devices(ethernet, UART,
buttons, LEDs and JTAG) are implemented. Between the MCU and
these devices, a CPLD is added as a bridge which performs
data/address de-multiplexing and decode, signal level shift,
interrupt control and various board functions.

Use EPIT as the system timer on systems that have it. Normally you
don't have a reason to do so as the EPIT has the same features and
uses the same clocks as the GPT. Anyway, on some systems the GPT
may be in use for other purposes.