ti,sci-clk.txt
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Texas Instruments TI-SCI Clocks
All clocks on Texas Instruments' SoCs that contain a System Controller
core, are only controlled by this entity. Communication between a
host processor running an OS and the System Controller happens through a
protocol known as TI SCI. This clock implementation plugs into the
common clock framework and makes use of the TI SCI protocol on clock
API requests.
Required properties:
- compatible: Must be "ti,sci-clk"
- #clock-cells: Shall be 2.
In clock consumers, this cell represents the device ID and clock ID
exposed by the PM firmware. The assignments can be found in the header
files <dt-bindings/genpd/<soc>.h> (which covers the device IDs) and
<dt-bindings/clock/<soc>.h> (which covers the clock IDs), where <soc>
is the SoC involved, for example 'k2g'.
- ti,sci: Phandle to the TI SCI device to use for managing the clocks
Optional properties:
- ti,ssc-clocks: Array of phandle clocks that shall enable spread spectrum
clocking while enabled
- ti,allow-freq-change-clocks: Array of phandle clocks that shall allow
dynamic clock frequency changes by firmware
- ti,input-term-clocks: Array of phandle clocks that shall enable input
termination
Examples:
k2g_clks: k2g_clks {
compatible = "ti,sci-clk";
ti,sci = <&pmmc>;
#clock-cells = <2>;
};
dummy_node@1234 {
clocks = <&k2g_clks K2G_DEV_DUMMY K2G_DEV_DUMMY_FCK>;
};
dummy_node2@2345 {
clocks = <&k2g_clks K2G_DEV_DUMMY2 K2G_DEV_DUMMY_X1_CLK>;
};
&k2g_clks {
ti,ssc-clocks = <&k2g_clks K2G_DEV_DUMMY K2G_DEV_DUMMY_FCK>;
};