diff options
| -rw-r--r-- | arch/arm/boot/dts/sun9i-a80.dtsi | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/sun9i-a80.dtsi b/arch/arm/boot/dts/sun9i-a80.dtsi index a4ce348c0831..eb69a62f6bc4 100644 --- a/arch/arm/boot/dts/sun9i-a80.dtsi +++ b/arch/arm/boot/dts/sun9i-a80.dtsi @@ -128,6 +128,17 @@ */ ranges = <0 0 0 0x20000000>; + /* + * This clock is actually configurable from the PRCM address + * space. The external 24M oscillator can be turned off, and + * the clock switched to an internal 16M RC oscillator. Under + * normal operation there's no reason to do this, and the + * default is to use the external good one, so just model this + * as a fixed clock. Also it is not entirely clear if the + * osc24M mux in the PRCM affects the entire clock tree, which + * would also throw all the PLL clock rates off, or just the + * downstream clocks in the PRCM. + */ osc24M: osc24M_clk { #clock-cells = <0>; compatible = "fixed-clock"; @@ -135,6 +146,13 @@ clock-output-names = "osc24M"; }; + /* + * The 32k clock is from an external source, normally the + * AC100 codec/RTC chip. This clock is by default enabled + * and clocked at 32768 Hz, from the oscillator connected + * to the AC100. It is configurable, but no such driver or + * bindings exist yet. + */ osc32k: osc32k_clk { #clock-cells = <0>; compatible = "fixed-clock"; |