On Wednesday 04 February 2015 15:21:44 Zubair Lutfullah Kakakhel wrote:
>
> +/ {
> + ext: clock@0 {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <12000000>;
> + };
> +
> + rtc: clock@1 {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <32768>;
> + };
> +
> + &cgu {
> + clocks = <&ext> <&rtc>;
> + clock-names: "ext", "rtc";
> + };
> +};
> diff --git a/include/dt-bindings/clock/jz4740-cgu.h b/include/dt-bindings/clock/jz4740-cgu.h
> new file mode 100644
> index 0000000..43153d3
> --- /dev/null
> +++ b/include/dt-bindings/clock/jz4740-cgu.h
> @@ -0,0 +1,37 @@
> +/*
> + * This header provides clock numbers for the ingenic,jz4740-cgu DT binding.
> + *
> + * They are roughly ordered as:
> + * - external clocks
> + * - PLLs
> + * - muxes/dividers in the order they appear in the jz4740 programmers manual
> + * - gates in order of their bit in the CLKGR* registers
> + */
> +
> +#ifndef __DT_BINDINGS_CLOCK_JZ4740_CGU_H__
> +#define __DT_BINDINGS_CLOCK_JZ4740_CGU_H__
> +
> +#define JZ4740_CLK_EXT 0
> +#define JZ4740_CLK_RTC 1
> +#define JZ4740_CLK_PLL 2
> +#define JZ4740_CLK_PLL_HALF 3
So there are fixed clocks for ext and rtc that are used as inputs
to the cgu, but also outputs with the same name. How do these relate?
Arnd
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