forked from Minki/linux
2c74b5399d
Previously we've only supported a few fixed clocks based on assumptions about how the firmware sets up the clocks, but this binding will let us control the actual (audio power domain) clock manager. Signed-off-by: Eric Anholt <eric@anholt.net> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Lee Jones <lee@kernel.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
46 lines
1.4 KiB
Plaintext
46 lines
1.4 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: The external oscillator clock phandle
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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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