clk: baikal-t1: Add shared xGMAC ref/ptp clocks internal parent
Baikal-T1 CCU reference manual says that both xGMAC reference and xGMAC PTP clocks are generated by two different wrappers with the same constant divider thus each producing a 156.25 MHz signal. But for some reason both of these clock sources are gated by a single switch-flag in the CCU registers space - CCU_SYS_XGMAC_BASE.BIT(0). In order to make the clocks handled independently we need to define a shared parental gate so the base clock signal would be switched off only if both of the child-clocks are disabled. Note the ID is intentionally set to -2 since we are going to add a one more internal clock identifier in the next commit. Fixes: 353afa3a ("clk: Add Baikal-T1 CCU Dividers driver") Signed-off-by:Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20220929225402.9696-4-Sergey.Semin@baikalelectronics.ru Signed-off-by:
Stephen Boyd <sboyd@kernel.org>
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