net: ethernet: ti: cpts: add support for ext rftclk selection

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Some CPTS instances, which can be found on KeyStone 2 1G Ethernet Switch
Subsystems, can control an external multiplexer that selects one of up to
32 clocks as time sync reference (RFTCLK) clock. This feature can be
configured through CPTS_RFTCLK_SEL register (offset: x08) in CPTS module
and can be represented as multiplexer clock.

Hence, introduce support for optional cpts-refclk-mux clock, which, once
defined will allow to select required CPTS RFTCLK by using
assigned-clock-parents DT property in board files.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Grygorii Strashko 2019-06-06 19:30:41 +03:00 • committed by David S. Miller

parent c8ad145143

commit a3047a81ba

2 changed files with 79 additions and 2 deletions

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79

drivers/net/ethernet/ti/cpts.c

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2

drivers/net/ethernet/ti/cpts.h

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