[PATCH 2/6] arm64: dts: ti: k3-j721e: Configure pinctrl for timer IO

[Tony Lindgren]

* Nishanth Menon <nm at ti.com> [230531 21:32]:
> There are timer IO pads in the MCU domain, and in the MAIN domain. These
> pads can be muxed for the related timers.
> 
> There are timer IO control registers for input and output. The registers
> for CTRLMMR_TIMER*_CTRL and CTRLMMR_MCU_TIMER*_CTRL are used to control
> the input. The registers for CTCTRLMMR_TIMERIO*_CTRL and
> CTRLMMR_MCU_TIMERIO*_CTRL the output.
> 
> The multiplexing is documented in Technical Reference Manual[1] under
> "Timer IO Muxing Control Registers" and "Timer IO Muxing Control
> Registers", and the "Timers Overview" chapters.
> 
> We do not expose the cascade_en bit due to the racy usage of
> independent 32 bit registers in-line with the timer instantiation in
> the device tree. The MCU timer controls are also marked as reserved for
> usage by the MCU firmware.

Reviewed-by: Tony Lindgren <tony at atomide.com>