Quoting Gerhard Sittig (2013-07-22 05:14:43)
> this addresses the clock driver aka provider's side of clocks
> - prepare for future '<&clks ID>' phandle references for device tree
> based clock lookup in client drivers
> - introduce a 'clocks' subtree with an 'osc' node for the crystal
> or oscillator SoC input (fixed frequency)
> - provide default values with 33MHz oscillator frequency in the
> common include (the 66MHz IPS bus already was there), add
> override values for the ifm AC14xx board which deviates from
> the reference design (25MHz xtal, 80MHz IPS bus)
>
> Signed-off-by: Gerhard Sittig <g...@denx.de>
Reviewed-by: Mike Turquette <mturque...@linaro.org>
> ---
> arch/powerpc/boot/dts/ac14xx.dts | 7 +++++++
> arch/powerpc/boot/dts/mpc5121.dtsi | 15 ++++++++++++++-
> 2 files changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/boot/dts/ac14xx.dts
> b/arch/powerpc/boot/dts/ac14xx.dts
> index a543c40..a1b8837 100644
> --- a/arch/powerpc/boot/dts/ac14xx.dts
> +++ b/arch/powerpc/boot/dts/ac14xx.dts
> @@ -139,7 +139,14 @@
> };
> };
>
> + clocks {
> + osc {
> + clock-frequency = <25000000>;
> + };
> + };
> +
> soc@80000000 {
> + bus-frequency = <80000000>; /* 80 MHz ips bus */
>
> clock@f00 {
> compatible = "fsl,mpc5121rev2-clock",
> "fsl,mpc5121-clock";
> diff --git a/arch/powerpc/boot/dts/mpc5121.dtsi
> b/arch/powerpc/boot/dts/mpc5121.dtsi
> index bd14c00..8f4cba0 100644
> --- a/arch/powerpc/boot/dts/mpc5121.dtsi
> +++ b/arch/powerpc/boot/dts/mpc5121.dtsi
> @@ -9,6 +9,8 @@
> * option) any later version.
> */
>
> +#include <dt-bindings/clock/mpc512x-clock.h>
> +
> /dts-v1/;
>
> / {
> @@ -73,6 +75,16 @@
> ranges = <0x0 0x0 0xfc000000 0x04000000>;
> };
>
> + clocks {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + osc {
> + compatible = "fsl,mpc512x-osc", "fixed-clock";
> + clock-frequency = <33000000>;
> + };
> + };
> +
> soc@80000000 {
> compatible = "fsl,mpc5121-immr";
> #address-cells = <1>;
> @@ -118,9 +130,10 @@
> };
>
> /* Clock control */
> - clock@f00 {
> + clks: clock@f00 {
> compatible = "fsl,mpc5121-clock";
> reg = <0xf00 0x100>;
> + #clock-cells = <1>;
> };
>
> /* Power Management Controller */
> --
> 1.7.10.4
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