xref: /freebsd/sys/contrib/device-tree/Bindings/clock/marvell,pxa1928.txt (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)
1*c66ec88fSEmmanuel Vadot* Marvell PXA1928 Clock Controllers
2*c66ec88fSEmmanuel Vadot
3*c66ec88fSEmmanuel VadotThe PXA1928 clock subsystem generates and supplies clock to various
4*c66ec88fSEmmanuel Vadotcontrollers within the PXA1928 SoC. The PXA1928 contains 3 clock controller
5*c66ec88fSEmmanuel Vadotblocks called APMU, MPMU, and APBC roughly corresponding to internal buses.
6*c66ec88fSEmmanuel Vadot
7*c66ec88fSEmmanuel VadotRequired Properties:
8*c66ec88fSEmmanuel Vadot
9*c66ec88fSEmmanuel Vadot- compatible: should be one of the following.
10*c66ec88fSEmmanuel Vadot  - "marvell,pxa1928-apmu" - APMU controller compatible
11*c66ec88fSEmmanuel Vadot  - "marvell,pxa1928-mpmu" - MPMU controller compatible
12*c66ec88fSEmmanuel Vadot  - "marvell,pxa1928-apbc" - APBC controller compatible
13*c66ec88fSEmmanuel Vadot- reg: physical base address of the clock controller and length of memory mapped
14*c66ec88fSEmmanuel Vadot  region.
15*c66ec88fSEmmanuel Vadot- #clock-cells: should be 1.
16*c66ec88fSEmmanuel Vadot- #reset-cells: should be 1.
17*c66ec88fSEmmanuel Vadot
18*c66ec88fSEmmanuel VadotEach clock is assigned an identifier and client nodes use the clock controller
19*c66ec88fSEmmanuel Vadotphandle and this identifier to specify the clock which they consume.
20*c66ec88fSEmmanuel Vadot
21*c66ec88fSEmmanuel VadotAll these identifiers can be found in <dt-bindings/clock/marvell,pxa1928.h>.
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