[v3,16/31] dts: mpc512x: add clock related device tree specs

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 <gsi@denx.de>
---
 arch/powerpc/boot/dts/ac14xx.dts   |    7 +++++++
 arch/powerpc/boot/dts/mpc5121.dtsi |   15 ++++++++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

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 <gsi@denx.de>

Reviewed-by: Mike Turquette <mturquette@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