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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. [1] http://www.ti.com/lit/pdf/spruil1 Signed-off-by: Nishanth Menon <nm@ti.com> Reviewed-by: Tony Lindgren <tony@atomide.com> Link: https://lore.kernel.org/r/20230531213215.602395-3-nm@ti.com Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> |
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