Eric Anholt | 2c74b53 | 2015-09-28 14:22:03 -0700 | [diff] [blame] | 1 | Broadcom BCM2835 CPRMAN clocks |
| 2 | |
| 3 | This binding uses the common clock binding: |
| 4 | Documentation/devicetree/bindings/clock/clock-bindings.txt |
| 5 | |
| 6 | The CPRMAN clock controller generates clocks in the audio power domain |
| 7 | of the BCM2835. There is a level of PLLs deriving from an external |
| 8 | oscillator, a level of PLL dividers that produce channels off of the |
| 9 | few PLLs, and a level of mostly-generic clock generators sourcing from |
| 10 | the PLL channels. Most other hardware components source from the |
| 11 | clock generators, but a few (like the ARM or HDMI) will source from |
| 12 | the PLL dividers directly. |
| 13 | |
| 14 | Required properties: |
| 15 | - compatible: Should be "brcm,bcm2835-cprman" |
| 16 | - #clock-cells: Should be <1>. The permitted clock-specifier values can be |
| 17 | found in include/dt-bindings/clock/bcm2835.h |
| 18 | - reg: Specifies base physical address and size of the registers |
| 19 | - clocks: The external oscillator clock phandle |
| 20 | |
| 21 | Example: |
| 22 | |
| 23 | clk_osc: clock@3 { |
| 24 | compatible = "fixed-clock"; |
| 25 | reg = <3>; |
| 26 | #clock-cells = <0>; |
| 27 | clock-output-names = "osc"; |
| 28 | clock-frequency = <19200000>; |
| 29 | }; |
| 30 | |
| 31 | clocks: cprman@7e101000 { |
| 32 | compatible = "brcm,bcm2835-cprman"; |
| 33 | #clock-cells = <1>; |
| 34 | reg = <0x7e101000 0x2000>; |
| 35 | clocks = <&clk_osc>; |
| 36 | }; |
| 37 | |
| 38 | i2c0: i2c@7e205000 { |
| 39 | compatible = "brcm,bcm2835-i2c"; |
| 40 | reg = <0x7e205000 0x1000>; |
| 41 | interrupts = <2 21>; |
| 42 | clocks = <&clocks BCM2835_CLOCK_VPU>; |
| 43 | #address-cells = <1>; |
| 44 | #size-cells = <0>; |
| 45 | }; |