ARM: dts: exynos: Add DMC bus node for Exynos3250

This patch adds the DMC (Dynamic Memory Controller) bus node for Exynos3250 SoC.
The DMC is an AMBA AXI-compliant slave to interface external JEDEC standard
SDRAM devices. The bus includes the OPP tables and the source clock for DMC
block.

Following list specifies the detailed relation between the clock and DMC block:
- The source clock of DMC block : div_dmc

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
index 137f9015d4e87a89ed30732a70bd5bd5c134a6cf..1ae72c4fa55e151703a35df1b6509a60f4c6ecdc 100644 (file)
--- a/arch/arm/boot/dts/exynos3250.dtsi
+++ b/arch/arm/boot/dts/exynos3250.dtsi
@@ -688,6 +688,40 @@
                        clock-names = "ppmu";
                        status = "disabled";
                };
+
+               bus_dmc: bus_dmc {
+                       compatible = "samsung,exynos-bus";
+                       clocks = <&cmu_dmc CLK_DIV_DMC>;
+                       clock-names = "bus";
+                       operating-points-v2 = <&bus_dmc_opp_table>;
+                       status = "disabled";
+               };
+
+               bus_dmc_opp_table: opp_table1 {
+                       compatible = "operating-points-v2";
+                       opp-shared;
+
+                       opp@50000000 {
+                               opp-hz = /bits/ 64 <50000000>;
+                               opp-microvolt = <800000>;
+                       };
+                       opp@100000000 {
+                               opp-hz = /bits/ 64 <100000000>;
+                               opp-microvolt = <800000>;
+                       };
+                       opp@134000000 {
+                               opp-hz = /bits/ 64 <134000000>;
+                               opp-microvolt = <800000>;
+                       };
+                       opp@200000000 {
+                               opp-hz = /bits/ 64 <200000000>;
+                               opp-microvolt = <825000>;
+                       };
+                       opp@400000000 {
+                               opp-hz = /bits/ 64 <400000000>;
+                               opp-microvolt = <875000>;
+                       };
+               };
        };
 };