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author | Eric Anholt <eric@anholt.net> | 2015-09-28 14:22:03 -0700 |
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committer | Stephen Boyd <sboyd@codeaurora.org> | 2015-10-01 17:12:14 -0700 |
commit | 2c74b5399de730e3155dc3d5a8ad041fba5e93f4 (patch) | |
tree | 00b711ac83e9dee9bc08c006e02688eee0ddd1a8 /Documentation/devicetree/bindings/clock | |
parent | 4f61d8e220c110de90a02736ceb55e1e398d6be7 (diff) | |
download | op-kernel-dev-2c74b5399de730e3155dc3d5a8ad041fba5e93f4.zip op-kernel-dev-2c74b5399de730e3155dc3d5a8ad041fba5e93f4.tar.gz |
clk: bcm2835: Add binding docs for the new platform clock driver.
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>
Diffstat (limited to 'Documentation/devicetree/bindings/clock')
-rw-r--r-- | Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt new file mode 100644 index 0000000..e56a1df --- /dev/null +++ b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt @@ -0,0 +1,45 @@ +Broadcom BCM2835 CPRMAN clocks + +This binding uses the common clock binding: + Documentation/devicetree/bindings/clock/clock-bindings.txt + +The CPRMAN clock controller generates clocks in the audio power domain +of the BCM2835. There is a level of PLLs deriving from an external +oscillator, a level of PLL dividers that produce channels off of the +few PLLs, and a level of mostly-generic clock generators sourcing from +the PLL channels. Most other hardware components source from the +clock generators, but a few (like the ARM or HDMI) will source from +the PLL dividers directly. + +Required properties: +- compatible: Should be "brcm,bcm2835-cprman" +- #clock-cells: Should be <1>. The permitted clock-specifier values can be + found in include/dt-bindings/clock/bcm2835.h +- reg: Specifies base physical address and size of the registers +- clocks: The external oscillator clock phandle + +Example: + + clk_osc: clock@3 { + compatible = "fixed-clock"; + reg = <3>; + #clock-cells = <0>; + clock-output-names = "osc"; + clock-frequency = <19200000>; + }; + + clocks: cprman@7e101000 { + compatible = "brcm,bcm2835-cprman"; + #clock-cells = <1>; + reg = <0x7e101000 0x2000>; + clocks = <&clk_osc>; + }; + + i2c0: i2c@7e205000 { + compatible = "brcm,bcm2835-i2c"; + reg = <0x7e205000 0x1000>; + interrupts = <2 21>; + clocks = <&clocks BCM2835_CLOCK_VPU>; + #address-cells = <1>; + #size-cells = <0>; + }; |