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59 lines
1.7 KiB
Plaintext
59 lines
1.7 KiB
Plaintext
Broadcom BCM2835 CPRMAN clocks
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This binding uses the common clock binding:
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Documentation/devicetree/bindings/clock/clock-bindings.txt
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The CPRMAN clock controller generates clocks in the audio power domain
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of the BCM2835. There is a level of PLLs deriving from an external
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oscillator, a level of PLL dividers that produce channels off of the
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few PLLs, and a level of mostly-generic clock generators sourcing from
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the PLL channels. Most other hardware components source from the
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clock generators, but a few (like the ARM or HDMI) will source from
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the PLL dividers directly.
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Required properties:
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- compatible: Should be "brcm,bcm2835-cprman"
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- #clock-cells: Should be <1>. The permitted clock-specifier values can be
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found in include/dt-bindings/clock/bcm2835.h
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- reg: Specifies base physical address and size of the registers
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- clocks: phandles to the parent clocks used as input to the module, in
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the following order:
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- External oscillator
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- DSI0 byte clock
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- DSI0 DDR2 clock
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- DSI0 DDR clock
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- DSI1 byte clock
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- DSI1 DDR2 clock
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- DSI1 DDR clock
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Only external oscillator is required. The DSI clocks may
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not be present, in which case their children will be
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unusable.
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Example:
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clk_osc: clock@3 {
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compatible = "fixed-clock";
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reg = <3>;
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#clock-cells = <0>;
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clock-output-names = "osc";
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clock-frequency = <19200000>;
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};
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clocks: cprman@7e101000 {
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compatible = "brcm,bcm2835-cprman";
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#clock-cells = <1>;
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reg = <0x7e101000 0x2000>;
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clocks = <&clk_osc>;
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};
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i2c0: i2c@7e205000 {
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compatible = "brcm,bcm2835-i2c";
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reg = <0x7e205000 0x1000>;
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interrupts = <2 21>;
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clocks = <&clocks BCM2835_CLOCK_VPU>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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