dts: mpc512x: add clock related device tree specs

this addresses the clock driver aka provider's side of clocks
- introduce a 'clocks' subtree with an 'osc' node for the crystal
  or oscillator SoC input (fixed frequency)
- the 'clock@f00' clock-control-module node references the 'osc' for
  its input, and is another provider for all the clocks which the
  CCM component manages
- prepare for future references to clocks from peripheral nodes
  by means of the <&clks ID> syntax and symbolic ID names which a
  header file provides
- provide default values with 33MHz oscillator frequency in the
  common include (the 66MHz IPS bus already was there), and add
  override values for the ifm AC14xx board which deviates from
  the reference design (25MHz xtal, 80MHz IPS bus)

Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: devicetree@vger.kernel.org
Reviewed-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Gerhard Sittig <gsi@denx.de>
Signed-off-by: Anatolij Gustschin <agust@denx.de>

diff --git a/arch/powerpc/boot/dts/ac14xx.dts b/arch/powerpc/boot/dts/ac14xx.dts
index a543c4088cba1ea026062a45df2c4ca0c95648ab..a1b883730b3169d8171c06c4fdc2d50cfe874b41 100644 (file)
--- 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 2d7cb04ac962ba3cfed781f408646d7669e50d7d..1d533e083e3c5c9b38ea66defcc14f47052a06ce 100644 (file)
--- 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 +75,17 @@
                ranges = <0x0 0x0 0xfc000000 0x04000000>;
        };
 
+       clocks {
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               osc: osc {
+                       compatible = "fixed-clock";
+                       #clock-cells = <0>;
+                       clock-frequency = <33000000>;
+               };
+       };
+
        soc@80000000 {
                compatible = "fsl,mpc5121-immr";
                #address-cells = <1>;
@@ -117,9 +130,12 @@
                };
 
                /* Clock control */
-               clock@f00 {
+               clks: clock@f00 {
                        compatible = "fsl,mpc5121-clock";
                        reg = <0xf00 0x100>;
+                       #clock-cells = <1>;
+                       clocks = <&osc>;
+                       clock-names = "osc";
                };
 
                /* Power Management Controller */